查询词典 first-order theory

This is the first main crux of dynamic theory.

这是动态学说第一个主要的难题。

The thesis can be divided into five parts as follows: First, the structural characteristics of finned-pipe evaporator are analyzed. After selecting suitable microelement controller, the heat-transfer and mass-transfer processes are analyzed for every microelement under the conditions of dryness, wetness and frostiness. Based on previous equations, some parameters of frostiness are confirmed and the frost-growing model is set up under frost condition. Some hypotheses are postulated and with the help of the equation of mass-conservation, energy-conservation and momentum-conservation, the evaporation model which fits in the dynamic simulation is built, which set a solid foundation for system simulation. Second, the starting and stopping behaviors under disturbed condition are analyzed and calculated by using the dynamic concentrative parameter model, which gives some advice to better prescribe refrigeration system and set theoretic foundation for carrying out automatic control of refrigeration system. Third, the normal running process is analyzed and calculated by means of rational matching theory, which gives some advice on how to better understand the parameter change under steady state and the affection of inlet-parameter on evaporator. Fourth, the simulation software with dynamic characteristic is designed, which can be applied to calculate thernio-parameter of cryogen, air humidity and frost thickness under different initial and boundary conditions, and to carry out dynamic simulation under conditions of dryness, wetness and frostiness, at the same time, to achieve detection and simulation at any stage from starting to stopping.

本文的主要内容如下：1对翅片管蒸发器结构特点进行分析，选取适当的微元控制体，就干、湿和霜工况下对每个微元分别进行传热传质分析，基于经验关系式确定霜的有关参数，对于霜工况下的霜生长建立模型，经适当假设，运用质量守恒、能量守恒和动量守恒方程建立适合动态仿真的蒸发器数学模型，为系统仿真奠定基础； 2对蒸发在大扰动下的开、停机过程，运用动态集中参数模型进行分析和计算，为更好地描述制冷系统运行的全过程奠定基础，同时也为制冷系统实现自动控制提供一定的理论基础； 3对蒸发器正常运行过程，运用动态分布参数和参数间定量耦合的观点来分析和计算，为更好地了解稳态工况下各点参数的变化情况及各入口参数对蒸发器动态特性的影响即蒸发器性能对各参数变化的敏感性； 4编写翅片管蒸发器动态特性仿真计算程序，可以计算不同边界条件和初始条件下的制冷剂热力参数、空气温湿度和霜厚度分布场，实现对翅片管蒸发器在干、湿和霜工况下的动态仿真。

In the early days of cryonics, the theory was that future medical technology would be able to fix this damage, along with curing whatever illness killed the patient in the first place.

在人体冰冻处理的早些时候，理论上是未来的医学研究可以弥补细胞的破裂，随同医治任何可以导致病人死亡的疾病。

This paper studies a class of cubic system with planar polynomial.We use the qualitative theory of ordinary differential equations method of analysis, reached the following conclusions of four parts: First, we analyze the quality of all critical points of the system,and draw the conditions of existence of singular integrals for the system , in front based on the analysis, using Pioncare form series method to calculate the focal value of o(0,0). Finally, we also study the behavior of critical points at infinity.

中文摘要：本文研究了一类平面三次多项式系统，我们采用常微分方程的定性理论的分析方法，得出如下四个部分结论：第一部分，分析系统所有奇点的性态，并得出系统存在奇异积分直线的条件；在前面分析的基础上，用Pioncare形式级数法，计算出了系统在奇点o(0，0)的三个焦点量；最后，研究了系统无穷远奇点的性态。

Kettle cleverly bellows theory, design, can be issued for assignment of the clock and the song of the cuckoo is similar to, and completion of the worlds first cuckoo clock, a cuckoo clock industry since then has grown rapidly.

凯特尔先生巧妙地用风箱原理，设计出让钟可以发出与布谷鸟相似的歌声，而完成了世界上第一座咕咕钟，咕咕钟业自此迅速发展。

First a hierarchically structured genotype is applied to represent cycloid parameters, and selection and mutation operators with evolutionary art are used to generate diverse patterns. Those with higher user rating are stored into the pattern database. Then fractal theory is introduced to configure these patterns on the basis of two distinct methods-Pythagoras tree design and Curlicue Fractal design.

采用层次结构化基因型表示摆线参数，使用进化艺术思想进行选择、变异操作，生成造型各异的花形图案，将用户评分较高的图案存入图案数据库；引入分形理论将图案库中的元件进行组装，提出基于Pythagoras树和花体分形原理的2套组装方案。

First, on the basis of the theory of fairness and efficiency in tax, expense deducting is analyzed referring to the juristic principle, which provides theoretical basis and reference for the adjustment in expense deducting system. Second, by the method of induction and comparing, the author analyzes and introduces the expense deducting system in other countries or regions. Third, defects which exist in current expense deducting system of individual income tax are demonstrated. At last, connected to the reform of patterns of individual income tax, relative suggestions regarding to the adjustment of expense deducting system in our country are put forward, which is adopting mixed tax jurisdiction. The two patterns of family tax and individual tax exist at the same time and family tax should be prevailing. These two patterns can be chosen by taxpayer voluntarily. Referring to the methods in other countries and regions, the items and standard of expense deducting of individual income tax should be improved.

首先以税收的公平和效率理论为基础，结合税收扣除的法律原则，对费用扣除进行分析，为我国的费用扣除制度调整提供了理论依据及参考；其次，运用归纳比较的方法，对国外的费用扣除制度进行了分析介绍；再次，论证了我国现行个人所得税费用扣除制度存在的缺陷；最后，本文结合个税税制模式的改革，提出调整我国费用扣除制度的相关建议：实行混合制；选择家庭课税和个人课税并存的模式，以家庭课税为主，由纳税人纳税时自愿选择；参考国外的做法，完善个人所得税费用扣除项目及标准。

First, the basic theory of curve resolution was systematically studied.

本文的工作以组分分辨能力为中心，从组分分辨的基本规律入手解决这个问题。

In 1957, Prange first began to study cyclic codes over field GF, and then the study of cyclic codes over GF was made great progress both on theory and on practice.

1957年普朗格首先开始在域GF上研究循环码，此后人们对域GF上循环码的研究在理论和实践方面都取得了很大进展。

Its applications in probability theory was first introduced in 1920s by Daniell (1921) and Wiener (1923),(see[7][24][25]), but then almost being forgotten after Kolmogorov's Axioms.

Peng在[18][19][20]中利用Daniell积分的方法定义了非线性数学期望并进行了相关问题的研究。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。