查询词典 science

Therefore it is necessary to research the mechanism of greensand used for high compacted molding methods thoroughly.This subject is one section of the National Natural Science Foundation subject ""Ivestigation on Predicting Method and Mechanism of Springback for High Compacted Sand Molds"", followed of the other completed one named ""Research on Microdeformation of Molding Sand"". A serious of experiments has been done on the reequipped three axial machine under certain technological conditions, and the mechanics, material science, rheologic science. It is systematically studied that the influences on the springback of sand mold were caused by the main influence factors: pressure, compacted rate and the content of soil. Through the analyzed experiments' data, the experienced stress-strain relationship concerning the main influence factors were obtained;under different technical parameter, the springback and spingback's potential energy are compared, the differences and indifferences between them are found out, and the springback's mechanism is discussed;according to the tests' data of YangGuoping coming from Tinghua University, experienced formula of molding sand's springback displacement is induced, the displacement and springback are compared, the margin of error's reasons are analyzed, and they are tested and verified mutually.

本课题为国家自然科学基金项目"高紧实度砂型预测方法及回弹机理的探讨"的一部分，是已结题的国家自然科学基金项目"铸造型砂微变形的研究"的后继，运用力学、材料学及流变学理论，利用改装的三轴仪，在一定的工艺条件下，作了大量系列实验，系统的研究了压实比压、紧实率和膨润土含量对砂型回弹的影响；对实验数据进行了分析和处理，得出了型砂关于压实比压、紧实率和膨润土含量的本构关系的经验公式；把各工艺参数下的型砂产生的回弹量与回弹势能进行比较，找出两者存在的异同点，并对回弹机理进行了探讨；通过清华大学杨国平的实验数据，推导出型砂回弹位移场的经验公式，并与实验测出的回弹量进行比较，分析误差造成的原因，并互相进行了验证。

Is a science of breathing,is a science of health,is the oldest science of life.

瑜伽是呼吸的科学，是健康的科学，是最古老的生活科学。

Yoga is a science of breathing, is a science of health, is the oldest science of life.

瑜伽是呼吸的科学，是健康的科学，是最古老的生活科学。

Secondly, philosophy of science is during interim, and it faces reproach which empiricism meets with, argument of determinism and indeterminism, and controversy of view on causality. The philosophy of science of Suppes just solves the questions in some sense in a kind of idea and way, and exceeds logical empiricism and 'postempiricism' to open up a new way for philosophy of science.

第二，科学哲学处于过渡时期，面对经验主义所遭受的非议、决定论与非决定论之争以及因果论的争议，苏佩斯的科学哲学以一种全新的思想和方法对这些问题做了某种程度的解决，并超越逻辑经验主义和"后经验主义"，为科学哲学另辟新径。

We can do many interesting experiments in science class. That's why we like science class very much. However, some experiments are difficult and dangerous. For example, something acid and alkaline will erode our body. Besides, indicators are very dangerous. So, be very careful to do any experiments inscience class! This is our experiment in science class.

我们喜欢上自然课，因为上自然课可以做实验，我们的自然实验有些有趣，有些困难，不过全都非常好玩，可是有些实验会使我们得生命有危险，像水溶液实验，因为酸、碱性的水溶液，会是我们的身体腐蚀，指示剂也非常危险，所以做实验要非常小心，以上就是我们的自然实验。

Actuarial science applies mathematical methods in insurance and is a science between applied mathematics and insurance. Bonus-malus system of automobile insurance is an important topic in actuarial science. Markov chain, Bayes theory, the theory of delay differential equation and dynamic programming are used to study BMS, especially optimal BMS, of automobile third-party liability insurance in this dissertation, which is organized as follows:First, we study the properties of Chinese present BMS.

精算学是将数学方法应用于金融保险所形成的一套理论体系，是应用数学研究领域和金融保险研究领域这两者之间的一个边缘学科，汽车保险奖惩系统是现代精算学中的一个重要研究课题，本文主要用马尔可夫链、贝叶斯理论、时滞微分方程理论与动态规划等研究汽车第三者责任保险奖惩系统，特别是最优奖惩系统。

Industrial Engineering emphasizes on "system conception","engineering consciousness" and "over all plans, integer optimization and synthesis", and it mainly involves system science, management science, computer science, operation research and ergonomics, etc.

工业工程领域的特点是强调"系统观念"和"工程意识"，重视研究对象的"统筹规划、整体优化和综合原理"。因此，工业工程领域涉及的主要学科领域有系统科学、现代管理科学、计算机科学、运筹学、人因工程等。

The approaches in organic chemistry reveal the essence of bonding of atoms within the oranic chemicals which constituent the matters in the world, the law of organic molecules interconversion, and designs and synthesizes organic molecules with special structures. Meanwhile, it provides theory, technology and materials for related subjects such as material science, life science and environmental science.

有机化学学科的发展，揭示了构成物质世界的有机化合物分子中各原子间键合的本质以及有机分子转化的规律并设计、合成了具有特定结构的有机分子；它又为材料科学、生命科学、环境科学等相关学科的发展提供了理论、技术和材料。

The intersection and interpenetrate of life science and engineering science are the conspicuous character of recent development of science and tenology. Envoluation, as an important self-adapt method drawn from life phenomena, has been generally recongnized and widely applied to problem solving. But the current evolving models have a common deficiency: they can not well reflect that the evoluation of the system is in fact the co-evolution under numerous local reciprocity.

生命科学与工程科学的相互交叉、相互渗透和相互促进是近代科学技术发展的显著特点之一，进化行为作为从生命现象中抽取的重要的自适应机制已被人们普遍认识并得到了广泛的应用，然而现有的进化模型存在一个共同的不足——未能很好地反映出一个普遍存在的事实：多数情况下，整个系统复杂的自适应进化过程，事实上，是一个构成系统的众多子系统局部相互作用的协同进化过程。

SCIENCE (for Grades 7 -9) is a newly assigned comprehensive course in the new round of educational course reform. Science course takes training the science attainment of students as purpose, it covers the original contents of Physics, Chemistry, Biology and Geography for junior high school, also Astronomy and some intersectional subjects are involved.

科学》(7～9年级)课程是新一轮基础教育课程改革中新设置的一门综合性课程，它以培养学生的科学素养为宗旨，涵盖了原有的初中物理、化学、生物以及地理的内容，同时在天文学及一些交叉学科领域有所涉及。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。