-
1 branches of mathematics
Макаров: разделы математикиУниверсальный англо-русский словарь > branches of mathematics
-
2 количественные методы
Включают в себя те разделы теории вероятности и статистики, которые относятся к управлению, методы исследования операций, разделы математики, которые использовались при разработке общественных наук (экономики, психологии, социологии и других наук). — These include those branches of probability and statistics that are relevant to management, operational research techniques, the branches of mathematics that have been employed in the development of social sciences (economics, psychology, sociology, etc.).
Russian-English Dictionary "Microeconomics" > количественные методы
-
3 разделы математики
Makarov: branches of mathematicsУниверсальный русско-английский словарь > разделы математики
-
4 ветви нетривиальных решений, ответвляющихся от тривиальной ветви
Универсальный русско-английский словарь > ветви нетривиальных решений, ответвляющихся от тривиальной ветви
-
5 несовмещённые ветви
Mathematics: not superposed branchesУниверсальный русско-английский словарь > несовмещённые ветви
-
6 Artificial Intelligence
In my opinion, none of [these programs] does even remote justice to the complexity of human mental processes. Unlike men, "artificially intelligent" programs tend to be single minded, undistractable, and unemotional. (Neisser, 1967, p. 9)Future progress in [artificial intelligence] will depend on the development of both practical and theoretical knowledge.... As regards theoretical knowledge, some have sought a unified theory of artificial intelligence. My view is that artificial intelligence is (or soon will be) an engineering discipline since its primary goal is to build things. (Nilsson, 1971, pp. vii-viii)Most workers in AI [artificial intelligence] research and in related fields confess to a pronounced feeling of disappointment in what has been achieved in the last 25 years. Workers entered the field around 1950, and even around 1960, with high hopes that are very far from being realized in 1972. In no part of the field have the discoveries made so far produced the major impact that was then promised.... In the meantime, claims and predictions regarding the potential results of AI research had been publicized which went even farther than the expectations of the majority of workers in the field, whose embarrassments have been added to by the lamentable failure of such inflated predictions....When able and respected scientists write in letters to the present author that AI, the major goal of computing science, represents "another step in the general process of evolution"; that possibilities in the 1980s include an all-purpose intelligence on a human-scale knowledge base; that awe-inspiring possibilities suggest themselves based on machine intelligence exceeding human intelligence by the year 2000 [one has the right to be skeptical]. (Lighthill, 1972, p. 17)4) Just as Astronomy Succeeded Astrology, the Discovery of Intellectual Processes in Machines Should Lead to a Science, EventuallyJust as astronomy succeeded astrology, following Kepler's discovery of planetary regularities, the discoveries of these many principles in empirical explorations on intellectual processes in machines should lead to a science, eventually. (Minsky & Papert, 1973, p. 11)5) Problems in Machine Intelligence Arise Because Things Obvious to Any Person Are Not Represented in the ProgramMany problems arise in experiments on machine intelligence because things obvious to any person are not represented in any program. One can pull with a string, but one cannot push with one.... Simple facts like these caused serious problems when Charniak attempted to extend Bobrow's "Student" program to more realistic applications, and they have not been faced up to until now. (Minsky & Papert, 1973, p. 77)What do we mean by [a symbolic] "description"? We do not mean to suggest that our descriptions must be made of strings of ordinary language words (although they might be). The simplest kind of description is a structure in which some features of a situation are represented by single ("primitive") symbols, and relations between those features are represented by other symbols-or by other features of the way the description is put together. (Minsky & Papert, 1973, p. 11)[AI is] the use of computer programs and programming techniques to cast light on the principles of intelligence in general and human thought in particular. (Boden, 1977, p. 5)The word you look for and hardly ever see in the early AI literature is the word knowledge. They didn't believe you have to know anything, you could always rework it all.... In fact 1967 is the turning point in my mind when there was enough feeling that the old ideas of general principles had to go.... I came up with an argument for what I called the primacy of expertise, and at the time I called the other guys the generalists. (Moses, quoted in McCorduck, 1979, pp. 228-229)9) Artificial Intelligence Is Psychology in a Particularly Pure and Abstract FormThe basic idea of cognitive science is that intelligent beings are semantic engines-in other words, automatic formal systems with interpretations under which they consistently make sense. We can now see why this includes psychology and artificial intelligence on a more or less equal footing: people and intelligent computers (if and when there are any) turn out to be merely different manifestations of the same underlying phenomenon. Moreover, with universal hardware, any semantic engine can in principle be formally imitated by a computer if only the right program can be found. And that will guarantee semantic imitation as well, since (given the appropriate formal behavior) the semantics is "taking care of itself" anyway. Thus we also see why, from this perspective, artificial intelligence can be regarded as psychology in a particularly pure and abstract form. The same fundamental structures are under investigation, but in AI, all the relevant parameters are under direct experimental control (in the programming), without any messy physiology or ethics to get in the way. (Haugeland, 1981b, p. 31)There are many different kinds of reasoning one might imagine:Formal reasoning involves the syntactic manipulation of data structures to deduce new ones following prespecified rules of inference. Mathematical logic is the archetypical formal representation. Procedural reasoning uses simulation to answer questions and solve problems. When we use a program to answer What is the sum of 3 and 4? it uses, or "runs," a procedural model of arithmetic. Reasoning by analogy seems to be a very natural mode of thought for humans but, so far, difficult to accomplish in AI programs. The idea is that when you ask the question Can robins fly? the system might reason that "robins are like sparrows, and I know that sparrows can fly, so robins probably can fly."Generalization and abstraction are also natural reasoning process for humans that are difficult to pin down well enough to implement in a program. If one knows that Robins have wings, that Sparrows have wings, and that Blue jays have wings, eventually one will believe that All birds have wings. This capability may be at the core of most human learning, but it has not yet become a useful technique in AI.... Meta- level reasoning is demonstrated by the way one answers the question What is Paul Newman's telephone number? You might reason that "if I knew Paul Newman's number, I would know that I knew it, because it is a notable fact." This involves using "knowledge about what you know," in particular, about the extent of your knowledge and about the importance of certain facts. Recent research in psychology and AI indicates that meta-level reasoning may play a central role in human cognitive processing. (Barr & Feigenbaum, 1981, pp. 146-147)Suffice it to say that programs already exist that can do things-or, at the very least, appear to be beginning to do things-which ill-informed critics have asserted a priori to be impossible. Examples include: perceiving in a holistic as opposed to an atomistic way; using language creatively; translating sensibly from one language to another by way of a language-neutral semantic representation; planning acts in a broad and sketchy fashion, the details being decided only in execution; distinguishing between different species of emotional reaction according to the psychological context of the subject. (Boden, 1981, p. 33)Can the synthesis of Man and Machine ever be stable, or will the purely organic component become such a hindrance that it has to be discarded? If this eventually happens-and I have... good reasons for thinking that it must-we have nothing to regret and certainly nothing to fear. (Clarke, 1984, p. 243)The thesis of GOFAI... is not that the processes underlying intelligence can be described symbolically... but that they are symbolic. (Haugeland, 1985, p. 113)14) Artificial Intelligence Provides a Useful Approach to Psychological and Psychiatric Theory FormationIt is all very well formulating psychological and psychiatric theories verbally but, when using natural language (even technical jargon), it is difficult to recognise when a theory is complete; oversights are all too easily made, gaps too readily left. This is a point which is generally recognised to be true and it is for precisely this reason that the behavioural sciences attempt to follow the natural sciences in using "classical" mathematics as a more rigorous descriptive language. However, it is an unfortunate fact that, with a few notable exceptions, there has been a marked lack of success in this application. It is my belief that a different approach-a different mathematics-is needed, and that AI provides just this approach. (Hand, quoted in Hand, 1985, pp. 6-7)We might distinguish among four kinds of AI.Research of this kind involves building and programming computers to perform tasks which, to paraphrase Marvin Minsky, would require intelligence if they were done by us. Researchers in nonpsychological AI make no claims whatsoever about the psychological realism of their programs or the devices they build, that is, about whether or not computers perform tasks as humans do.Research here is guided by the view that the computer is a useful tool in the study of mind. In particular, we can write computer programs or build devices that simulate alleged psychological processes in humans and then test our predictions about how the alleged processes work. We can weave these programs and devices together with other programs and devices that simulate different alleged mental processes and thereby test the degree to which the AI system as a whole simulates human mentality. According to weak psychological AI, working with computer models is a way of refining and testing hypotheses about processes that are allegedly realized in human minds.... According to this view, our minds are computers and therefore can be duplicated by other computers. Sherry Turkle writes that the "real ambition is of mythic proportions, making a general purpose intelligence, a mind." (Turkle, 1984, p. 240) The authors of a major text announce that "the ultimate goal of AI research is to build a person or, more humbly, an animal." (Charniak & McDermott, 1985, p. 7)Research in this field, like strong psychological AI, takes seriously the functionalist view that mentality can be realized in many different types of physical devices. Suprapsychological AI, however, accuses strong psychological AI of being chauvinisticof being only interested in human intelligence! Suprapsychological AI claims to be interested in all the conceivable ways intelligence can be realized. (Flanagan, 1991, pp. 241-242)16) Determination of Relevance of Rules in Particular ContextsEven if the [rules] were stored in a context-free form the computer still couldn't use them. To do that the computer requires rules enabling it to draw on just those [ rules] which are relevant in each particular context. Determination of relevance will have to be based on further facts and rules, but the question will again arise as to which facts and rules are relevant for making each particular determination. One could always invoke further facts and rules to answer this question, but of course these must be only the relevant ones. And so it goes. It seems that AI workers will never be able to get started here unless they can settle the problem of relevance beforehand by cataloguing types of context and listing just those facts which are relevant in each. (Dreyfus & Dreyfus, 1986, p. 80)Perhaps the single most important idea to artificial intelligence is that there is no fundamental difference between form and content, that meaning can be captured in a set of symbols such as a semantic net. (G. Johnson, 1986, p. 250)Artificial intelligence is based on the assumption that the mind can be described as some kind of formal system manipulating symbols that stand for things in the world. Thus it doesn't matter what the brain is made of, or what it uses for tokens in the great game of thinking. Using an equivalent set of tokens and rules, we can do thinking with a digital computer, just as we can play chess using cups, salt and pepper shakers, knives, forks, and spoons. Using the right software, one system (the mind) can be mapped into the other (the computer). (G. Johnson, 1986, p. 250)19) A Statement of the Primary and Secondary Purposes of Artificial IntelligenceThe primary goal of Artificial Intelligence is to make machines smarter.The secondary goals of Artificial Intelligence are to understand what intelligence is (the Nobel laureate purpose) and to make machines more useful (the entrepreneurial purpose). (Winston, 1987, p. 1)The theoretical ideas of older branches of engineering are captured in the language of mathematics. We contend that mathematical logic provides the basis for theory in AI. Although many computer scientists already count logic as fundamental to computer science in general, we put forward an even stronger form of the logic-is-important argument....AI deals mainly with the problem of representing and using declarative (as opposed to procedural) knowledge. Declarative knowledge is the kind that is expressed as sentences, and AI needs a language in which to state these sentences. Because the languages in which this knowledge usually is originally captured (natural languages such as English) are not suitable for computer representations, some other language with the appropriate properties must be used. It turns out, we think, that the appropriate properties include at least those that have been uppermost in the minds of logicians in their development of logical languages such as the predicate calculus. Thus, we think that any language for expressing knowledge in AI systems must be at least as expressive as the first-order predicate calculus. (Genesereth & Nilsson, 1987, p. viii)21) Perceptual Structures Can Be Represented as Lists of Elementary PropositionsIn artificial intelligence studies, perceptual structures are represented as assemblages of description lists, the elementary components of which are propositions asserting that certain relations hold among elements. (Chase & Simon, 1988, p. 490)Artificial intelligence (AI) is sometimes defined as the study of how to build and/or program computers to enable them to do the sorts of things that minds can do. Some of these things are commonly regarded as requiring intelligence: offering a medical diagnosis and/or prescription, giving legal or scientific advice, proving theorems in logic or mathematics. Others are not, because they can be done by all normal adults irrespective of educational background (and sometimes by non-human animals too), and typically involve no conscious control: seeing things in sunlight and shadows, finding a path through cluttered terrain, fitting pegs into holes, speaking one's own native tongue, and using one's common sense. Because it covers AI research dealing with both these classes of mental capacity, this definition is preferable to one describing AI as making computers do "things that would require intelligence if done by people." However, it presupposes that computers could do what minds can do, that they might really diagnose, advise, infer, and understand. One could avoid this problematic assumption (and also side-step questions about whether computers do things in the same way as we do) by defining AI instead as "the development of computers whose observable performance has features which in humans we would attribute to mental processes." This bland characterization would be acceptable to some AI workers, especially amongst those focusing on the production of technological tools for commercial purposes. But many others would favour a more controversial definition, seeing AI as the science of intelligence in general-or, more accurately, as the intellectual core of cognitive science. As such, its goal is to provide a systematic theory that can explain (and perhaps enable us to replicate) both the general categories of intentionality and the diverse psychological capacities grounded in them. (Boden, 1990b, pp. 1-2)Because the ability to store data somewhat corresponds to what we call memory in human beings, and because the ability to follow logical procedures somewhat corresponds to what we call reasoning in human beings, many members of the cult have concluded that what computers do somewhat corresponds to what we call thinking. It is no great difficulty to persuade the general public of that conclusion since computers process data very fast in small spaces well below the level of visibility; they do not look like other machines when they are at work. They seem to be running along as smoothly and silently as the brain does when it remembers and reasons and thinks. On the other hand, those who design and build computers know exactly how the machines are working down in the hidden depths of their semiconductors. Computers can be taken apart, scrutinized, and put back together. Their activities can be tracked, analyzed, measured, and thus clearly understood-which is far from possible with the brain. This gives rise to the tempting assumption on the part of the builders and designers that computers can tell us something about brains, indeed, that the computer can serve as a model of the mind, which then comes to be seen as some manner of information processing machine, and possibly not as good at the job as the machine. (Roszak, 1994, pp. xiv-xv)The inner workings of the human mind are far more intricate than the most complicated systems of modern technology. Researchers in the field of artificial intelligence have been attempting to develop programs that will enable computers to display intelligent behavior. Although this field has been an active one for more than thirty-five years and has had many notable successes, AI researchers still do not know how to create a program that matches human intelligence. No existing program can recall facts, solve problems, reason, learn, and process language with human facility. This lack of success has occurred not because computers are inferior to human brains but rather because we do not yet know in sufficient detail how intelligence is organized in the brain. (Anderson, 1995, p. 2)Historical dictionary of quotations in cognitive science > Artificial Intelligence
-
7 воспользоваться
1) General subject: avail of, avail oneself, avail oneself of (случаем, предложением), capitalize on, embrace (случаем, предложением), improve (случаем), partake (гостеприимством и т. п.; of), partake of (напр., гостеприимством), play (чем-либо), pounce (ошибкой, промахом и т. п.; upon), put to use, redeem, seize (случаем, предлогом), take advantage, take advantage (преимуществом), take advantage of, take hold, take hold of, use, use opportunity, avail of (чем-л.), make advantage of (чем-л.), take advantage of (чем-л.), take an advantage of (чем-л.), feed off (She feeds off her boyfriend's naivety to go out with other men. ; Many branches feed off customers' pursuit of wealth to launch more and more new products into the market.), exercise (an option), capitalise on, take2) Literal: make a draft on a fund (дружбой, хорошим отношением, доверием)3) Engineering: make use of, take into use, utilize4) Mathematics: be in service in, be used (up), be useful, be utilized, employ, exploit, invoke, make use5) Economy: profit by6) Australian slang: take on board (чем-л.)7) Diplomatic term: avail oneself of (ч-л), improve (чем-л.), take advantage of (чем-л.)8) Jargon: cash in on, ace (в своих целях, обычно обманным путем: a friend who aced me out of a good job)9) Business: improve, profit, capitalize (capitalize on the relatively low rent)10) Makarov: gain advantage, cash in -
8 счётное множество
1) Computers: denumerable density2) Mathematics: countable collection, countable ensemble (enumerable), countable set, countable set (There is a countable infinity of non-trivial solutions branches bifurcating from the trivial branch.), denumerable many, denumerable set (Существует счетное множество различных пар решений.), enumerable set3) Information technology: denumerable set4) Makarov: numerable set -
9 arborescence
arborescence [aʀbɔʀesɑ̃s]feminine noun(Agriculture) arborescence ; (Linguistics, mathematics) tree (diagram) ; (Computing) tree (structure)* * *aʀbɔʀesɑ̃s nf(représentation en arbre) tree structure, LINGUISTIQUE tree diagram, INFORMATIQUE tree diagram* * *arborescence nf1 ( de végétal) tree-like aspect, arborescence spéc;2 (de veines, branches) branching;[arbɔresɑ̃s] nom féminin[forme] arborescence[diagramme] tree diagram -
10 point
point [pɔɪnt]pointe ⇒ 1 (a) point ⇒ 1 (b), 1 (c), 1 (e), 1 (f),1(i)-(l), 1 (n), 1 (o) endroit ⇒ 1 (c) moment ⇒ 1 (d) essentiel ⇒ 1 (g) but ⇒ 1 (h) virgule ⇒ 1 (m) diriger ⇒ 2 (a) pointer ⇒ 2 (a) indiquer ⇒ 2 (b) montrer du doigt ⇒ 3 (a)1 noun(a) (tip → of sword, nail, pencil etc) pointe f;∎ trim one end of the stick into a point taillez un des bouts de la branche en pointe;∎ his beard ended in a neat point sa barbe était soigneusement taillée en pointe;∎ draw a star with five points dessinez une étoile à cinq branches;∎ a dog with white points un chien aux pattes et aux oreilles blanches;∎ an eight-point stag un cerf huit cors;∎ to dance on points faire des pointes;∎ on (full) point (ballet dancer) sur la pointe;∎ on demi-point (ballet dancer) sur la demi-pointe;∎ not to put too fine a point on it… pour dire les choses clairement…(b) (small dot) point m;∎ a tiny point of light un minuscule point de lumière(c) (specific place) point m, endroit m, lieu m;∎ intersection point point m d'intersection;∎ meeting point (sign) point rencontre;∎ the runners have passed the halfway point les coureurs ont dépassé la mi-parcours;∎ we're back to our point of departure or our starting point nous sommes revenus au ou à notre point de départ;∎ the point where the accident occurred l'endroit où l'accident a eu lieu;∎ at that point you'll see a church on the left à ce moment-là, vous verrez une église sur votre gauche;∎ the terrorists claim they can strike at any point in the country les terroristes prétendent qu'ils peuvent frapper n'importe où dans le pays;∎ the bus service to Dayton and points west le service de bus à destination de Dayton et des villes situées plus à l'ouest;∎ points south of here get little rainfall les régions situées au sud d'ici n'ont pas une grande pluviosité∎ the country is at a critical point in its development le pays traverse une période ou phase critique de son développement;∎ we are at a critical point nous voici à un point critique;∎ there comes a point when a decision has to be made il arrive un moment où il faut prendre une décision;∎ when it comes to the point of actually doing it quand vient le moment de passer à l'acte;∎ when it came to the point quand le moment critique est arrivé;∎ at one point in the discussion à un moment de la discussion;∎ at one point in my travels au cours de mes voyages;∎ at one point, I thought the roof was going to cave in à un moment (donné), j'ai cru que le toit allait s'effondrer;∎ at one point in the book à un moment donné dans le livre;∎ at this point the phone rang c'est alors que le téléphone a sonné, à ce moment-là le téléphone a sonné;∎ at that point, I was still undecided à ce moment-là, je n'avais pas encore pris de décision;∎ at that point in China's history à ce moment précis de l'histoire de la Chine;∎ it's too late by this point il est déjà trop tard à l'heure qu'il est;∎ by that point, I was too tired to move j'étais alors tellement fatigué que je ne pouvais plus bouger(e) (stage in development or process) point m;∎ she had reached the point of wanting a divorce elle en était (arrivée) au point de vouloir divorcer;∎ thank God we haven't reached that point! Dieu merci, nous n'en sommes pas (encore arrivés) là!;∎ to reach the point of no return atteindre le point de non-retour;∎ to be at the point of death être sur le point de mourir;∎ the conflict has gone beyond the point where negotiations are possible le conflit a atteint le stade où toute négociation est impossible;∎ the regime is on the point of collapse le régime est au bord de l'effondrement;∎ I was on the point of admitting everything j'étais sur le point de tout avouer;∎ she had worked to the point of exhaustion elle avait travaillé jusqu'à l'épuisement;∎ he was jealous to the point of madness sa jalousie confinait à la folie;∎ he stuffed himself to the point of being sick il s'est gavé à en être malade(f) (for discussion or debate) point m;∎ a seven-point memorandum un mémorandum en sept points;∎ let's go on to the next point passons à la question suivante ou au point suivant;∎ on this point we disagree sur ce point nous ne sommes pas d'accord;∎ I want to emphasize this point je voudrais insister sur ce point;∎ are there any points I haven't covered? y a-t-il des questions que je n'ai pas abordées?;∎ to make or to raise a point faire une remarque;∎ to make the point that… faire remarquer que… + indicative;∎ my point or the point I'm making is that… là où je veux en venir c'est que…;∎ all right, you've made your point! d'accord, on a compris!;∎ the points raised in her article les points qu'elle soulève dans son article;∎ the main points to keep in mind les principaux points à garder à l'esprit;∎ let me illustrate my point laissez-moi illustrer mon propos;∎ to prove his point he showed us a photo pour prouver ses affirmations, il nous a montré une photo;∎ I see or take your point je vois ce que vous voulez dire ou où vous voulez en venir;∎ point taken! c'est juste!;∎ he may not be home - you've got a point there! il n'est peut-être pas chez lui - ça c'est vrai!;∎ the fact that he went to the police is a point in his favour/a point against him le fait qu'il soit allé à la police est un bon/mauvais point pour lui;∎ I corrected her on a point of grammar je l'ai corrigée sur un point de grammaire;∎ she was disqualified on a technical point elle a été disqualifiée pour ou sur une faute technique;∎ to make a point of doing sth tenir à faire qch;∎ he made a point of speaking to her il a tenu à lui adresser la parole;∎ kindly make a point of remembering next time faites-moi le plaisir de ne pas oublier la prochaine fois∎ I get the point je comprends, je vois;∎ the point is (that) we're overloaded with work le fait est que nous sommes débordés de travail;∎ we're getting off or away from the point nous nous éloignons ou écartons du sujet;∎ that's the (whole) point! (that's the problem) c'est là (tout) le problème!; (that's the aim) c'est ça, le but!;∎ that's not the point! là n'est pas la question!;∎ the money is/your feelings are beside the point l'argent n'a/vos sentiments n'ont rien à voir là-dedans;∎ get or come to the point! dites ce que vous avez à dire!, ne tournez pas autour du pot!;∎ I'll come straight to the point je serai bref;∎ to keep to the point ne pas s'écarter du sujet∎ the point of the game is to get rid of all your cards le but du jeu est de se débarrasser de toutes ses cartes;∎ there's no point in asking him now ça ne sert à rien ou ce n'est pas la peine de le lui demander maintenant;∎ what's the point of all this? à quoi ça sert tout ça?;∎ I don't see the point (of re-doing it) je ne vois pas l'intérêt (de le refaire);∎ oh, what's the point anyway! oh, et puis à quoi bon, après tout!(i) (feature, characteristic) point m;∎ the boss has his good points le patron a ses bons côtés;∎ it's my weak/strong point c'est mon point faible/fort;∎ her strong point is her sense of humour son point fort, c'est son sens de l'humour;∎ tact has never been one of your strong points la délicatesse n'a jamais été ton fort∎ the Dow Jones index is up/down two points l'indice Dow Jones a augmenté/baissé de deux points;∎ who scored the winning point? qui a marqué le point gagnant?;∎ an ace is worth 4 points un as vaut 4 points;∎ to win/to lead on points (in boxing) gagner/mener aux points;∎ American familiar to make points with sb (find favour with) faire bonne impression à qn□ ;∎ School merit points bons points mpl;∎ points competition (in cycling) classement m par points(k) (on compass) point m;∎ the four points of the compass les quatre points mpl cardinaux;∎ the 32 points of the compass les 32 points mpl de la rose des vents;∎ to alter course 16 points venir de 16 quarts;∎ our people were scattered to all points of the compass notre peuple s'est retrouvé éparpillé aux quatre coins du monde∎ a straight line between two points une droite reliant deux points(m) (in decimals) virgule f;∎ five point one cinq virgule un(n) (punctuation mark) point m;∎ three or ellipsis points points mpl de suspension∎ 6-point type caractères mpl de 6 points∎ (power) point prise f (de courant);∎ eight-point distributor (in engine) distributeur m (d'allumage) à huit plots∎ points aiguillage m(t) (on backgammon board) flèche f, pointe f(a) (direct, aim → vehicle) diriger; (→ flashlight, hose) pointer, braquer; (→ finger) pointer, tendre; (→ telescope) diriger, braquer;∎ to point one's finger at sb/sth montrer qn/qch du doigt;∎ he pointed his finger accusingly at Gus il pointa un doigt accusateur vers Gus, il montra ou désigna Gus d'un doigt accusateur;∎ to point a gun at sb braquer une arme sur qn;∎ he pointed the rifle/the camera at me il braqua le fusil/l'appareil photo sur moi;∎ she pointed the truck towards the garage elle tourna le camion vers le garage;∎ he pointed the boat out to sea il a mis le cap vers le large;∎ if anybody shows up, just point them in my direction si quelqu'un arrive, tu n'as qu'à me l'envoyer;∎ just point me in the right direction dites-moi simplement quelle direction je dois prendre;∎ just point him to the nearest bar tu n'as qu'à lui indiquer le chemin du bar le plus proche∎ to point the way indiquer la direction ou le chemin; figurative montrer le chemin, indiquer la direction à suivre;∎ he pointed the way to future success il a montré le chemin de la réussite;∎ her research points the way to a better understanding of the phenomenon ses recherches vont permettre une meilleure compréhension du phénomène;∎ they point the way (in) which reform must go ils indiquent la direction dans laquelle les réformes doivent aller∎ to point one's toes tendre le pied(e) (sharpen → stick, pencil) tailler(f) Linguistics mettre des signes diacritiques à∎ to point at or to or towards sth montrer qch du doigt;∎ she pointed left elle fit un signe vers la gauche;∎ he pointed back down the corridor il fit un signe vers le fond du couloir;∎ he pointed at or to me with his pencil il pointa son crayon vers moi;∎ he was pointing at me son doigt était pointé vers moi;∎ it's rude to point ce n'est pas poli de montrer du doigt(b) (road sign, needle on dial)∎ the signpost points up the hill le panneau est tourné vers le haut de la colline;∎ a compass needle always points north l'aiguille d'une boussole indique toujours le nord;∎ the weather vane is pointing north la girouette est orientée au nord;∎ when the big hand points to twelve quand la grande aiguille est sur le douze∎ hold the gun with the barrel pointing downwards tenez le canon de l'arme pointé vers le bas;∎ the rifle/the camera was pointing straight at me la carabine/la caméra était braquée sur moi;∎ point your flashlight over there éclaire là-bas;∎ insert the disk with the arrow pointing right insérez la disquette, la flèche pointée ou pointant vers la droite;∎ the aerial should be pointing in the direction of the transmitter l'antenne devrait être tournée dans la direction de ou tournée vers l'émetteur;∎ he walks with his feet pointing outwards il marche les pieds en dehorspour l'instant;∎ no more details are available at this point in time pour l'instant, nous ne disposons pas d'autres détailsen fait, à vrai direpertinentjusqu'à un certain point;∎ did the strategy succeed? - up to a point est-ce que la stratégie a réussi? - dans une certaine mesure;∎ productivity can be increased up to a point la productivité peut être augmentée jusqu'à un certain point;∎ she can be persuaded, but only up to a point il est possible de la convaincre, mais seulement jusqu'à un certain point►► Marketing point of delivery lieu m de livraison;British point duty (of police officer, traffic warden) service m de la circulation;∎ to be on point duty diriger la circulation;point guard (in basketball) meneur(euse) m,f;point of intersection point m d'intersection;point of order point m de procédure;∎ he rose on a point of order il a demandé la parole pour soulever un point de procédure;American point man (in the forefront) précurseur m;Computing point of presence point m de présence, point m d'accès;Marketing point of purchase lieu m d'achat, lieu m de vente;point of reference point m de référence;Marketing point of sale lieu m de vente, point m de vente;∎ at the point of sale sur le lieu de vente;point shoes (for ballet) (chaussons mpl à) pointes fpl;Typography & Computing point size corps m;point source source f ponctuelle;point of view Television & Cinema angle m du regard; (opinion) point m de vue, opinion f;∎ from my point of view, it doesn't make much difference en ce qui me concerne, ça ne change pas grand-chose;∎ to consider sth from all points of view considérer qch sous tous ses aspects;point work (of ballet dancer) pointes fplMathematics (decimals) séparer par une virgule(a) (indicate) indiquer, montrer;∎ I'll point the church out to you as we go by je vous montrerai ou vous indiquerai l'église quand nous passerons devant∎ she pointed out several mistakes to us elle nous a signalé plusieurs erreurs, elle a attiré notre attention sur plusieurs erreurs;∎ I'd like to point out that it was my idea in the first place je vous ferai remarquer que l'idée est de moi;∎ might I point out that…? permettez-moi de vous faire observer ou remarquer que…;∎ he pointed out that two people were missing il fit remarquer qu'il manquait deux personnes∎ the facts point to only one conclusion les faits ne permettent qu'une seule conclusion;∎ all the evidence points to him toutes les preuves indiquent que c'est lui;∎ everything points to CIA involvement tout indique que la CIA est impliquée(b) (call attention to) attirer l'attention sur;∎ ecologists point to the destruction of forest land les écologistes attirent notre attention sur la destruction des forêts;∎ they proudly point to the government's record ils invoquent avec fierté le bilan du gouvernement(of person, report) souligner, mettre l'accent sur; (of event) faire ressortir;∎ his account points up the irony of the defeat son exposé met l'accent sur l'ironie de la défaite;∎ the accident points up the need for closer cooperation l'accident fait ressortir le besoin d'une coopération plus étroite -
11 Lippman, Gabriel
SUBJECT AREA: Photography, film and optics[br]b. 16 August 1845 Hallerick, Luxembourgd. 14 July 1921 at sea, in the North Atlantic[br]French physicist who developed interference colour photography.[br]Born of French parents, Lippman's work began with a distinguished career in classics, philosophy, mathematics and physics at the Ecole Normale in Luxembourg. After further studies in physics at Heidelberg University, he returned to France and the Sorbonne, where he was in 1886 appointed Director of Physics. He was a leading pioneer in France of research into electricity, optics, heat and other branches of physics.In 1886 he conceived the idea of recording the existence of standing waves in light when it is reflected back on itself, by photographing the colours so produced. This required the production of a photographic emulsion that was effectively grainless: the individual silver halide crystals had to be smaller than the shortest wavelength of light to be recorded. Lippman succeeded in this and in 1891 demonstrated his process. A glass plate was coated with a grainless emulsion and held in a special plate-holder, glass towards the lens. The back of the holder was filled with mercury, which provided a perfect reflector when in contact with the emulsion. The standing waves produced during the exposure formed laminae in the emulsion, with the number of laminae being determined by the wavelength of the incoming light at each point on the image. When the processed plate was viewed under the correct lighting conditions, a theoretically exact reproduction of the colours of the original subject could be seen. However, the Lippman process remained a beautiful scientific demonstration only, since the ultra-fine-grain emulsion was very slow, requiring exposure times of over 10,000 times that of conventional negative material. Any method of increasing the speed of the emulsion also increased the grain size and destroyed the conditions required for the process to work.[br]Principal Honours and DistinctionsRoyal Photographic Society Progress Medal 1897. Nobel Prize (for his work in interference colour photography) 1908.Further ReadingJ.S.Friedman, 1944, History of Colour Photography, Boston.Brian Coe, 1978, Colour Photography: The First Hundred Years, London. Gert Koshofer, 1981, Farbfotografie, Vol. I, Munich.BC
См. также в других словарях:
mathematics — /math euh mat iks/, n. 1. (used with a sing. v.) the systematic treatment of magnitude, relationships between figures and forms, and relations between quantities expressed symbolically. 2. (used with a sing. or pl. v.) mathematical procedures,… … Universalium
MATHEMATICS — Bible The Bible does not deal directly with proper mathematical subjects; however there are some parts that do relate indirectly to different mathematical topics. These are widely discussed by the various commentators on the Bible and Talmud: the … Encyclopedia of Judaism
Mathematics education — A mathematics lecture at Aalto University School of Science and Technology. Educational Research … Wikipedia
mathematics, foundations of — Scientific inquiry into the nature of mathematical theories and the scope of mathematical methods. It began with Euclid s Elements as an inquiry into the logical and philosophical basis of mathematics in essence, whether the axioms of any system… … Universalium
mathematics, philosophy of — Branch of philosophy concerned with the epistemology and ontology of mathematics. Early in the 20th century, three main schools of thought called logicism, formalism, and intuitionism arose to account for and resolve the crisis in the foundations … Universalium
mathematics, East Asian — Introduction the discipline of mathematics as it developed in China and Japan. When speaking of mathematics in East Asia, it is necessary to take into account China, Japan, Korea, and Vietnam as a whole. At a very early time in their… … Universalium
Mathematics and Physical Sciences — ▪ 2003 Introduction Mathematics Mathematics in 2002 was marked by two discoveries in number theory. The first may have practical implications; the second satisfied a 150 year old curiosity. Computer scientist Manindra Agrawal of the… … Universalium
mathematics — I (New American Roget s College Thesaurus) n. computation, calculation, reckoning, arithmetic. See numeration. II (Roget s IV) n. Syn. science of numbers, language of numbers, computation, reckoning, calculation, correlation and deduction of… … English dictionary for students
Mathematics — Maths and Math redirect here. For other uses see Mathematics (disambiguation) and Math (disambiguation). Euclid, Greek mathematician, 3r … Wikipedia
Definitions of mathematics — Mathematics has no generally accepted definition. Different schools of thought, particularly in philosophy, have put forth radically different definitions. All are controversial. Contents 1 Survey of leading definitions 1.1 Early definitions 1.2… … Wikipedia
Mathematics of radio engineering — A complex valued function. The mathematics of radio engineering is a pleasant and very useful subject. This article is an attempt to provide a reasonably comprehensive summary of this almost limitless topic. While the ideas have historically… … Wikipedia