查询词典 first-order theory

First the theory of grey system and of principle grey prediction model is presented.Based on the data of sown areas of farm crops in Hubei Province for 9 years,the GM(1,1) grey prediction model is established and the precision of prediction is higher by checking the result,so the model may be applied to the prediction of sown areas of farm crops in Hubei Province for futural severe years.

中文摘要：首先介绍了灰色系统理论及灰色预测建模原理，以湖北省连续9年的农作物播种面积数据为基础，建立GM(1，1)灰色预测模型，对湖北省未来8年的农作物播种面积进行了预测，并对预测结果进行检验，预测结果精度较高，可以用来对湖北省未来几年的农作物播种面积进行预测。

On the basis of the correct understanding of porphine structure, the S4 axis of protonated porphine is obtained first in theory by MP2 and B3LYP methods considering electron correlation energy, which is in agreement with crystal analysis experiments.

在正确认识卟吩结构的基础上，选用考虑电子相关的MP2和B3LYP方法，从理论上得到质子化卟吩的S轴，与晶体衍射实验的结果一致。

By use of the first principles theory,the segregation energies of light impurities P、N on the ∑3(111) grain boundary and the(111) surface of body-centered cubic Fe were computed, and the brittleductile mechanisms of P、N were discussed energetically.

利用第一原理理论计算了轻杂质P、N在体心F e∑3[110](111)晶界和F e(111)表面的偏聚能，从能量方面对P、N的韧脆机制进行了探讨。

First, the theory of fretting wear and studies on fretting fatigue were introduced and the parametric method was used in the process of creating the model of dovetail joints in UG software. The elastic contact problem is analyzed in finite element method and is used to the parameters' distribution and contact stress of the joint are obtained on the base of ANSYS code. With the effect factor of load frequency, the prediction method of fretting fatigue life of dovetail joint under low and high/low cycle complex load is proposed. The proposed model and the approach were verified by experiments.

本文介绍了微动损伤的机理和微动疲劳寿命的研究方法；利用UG软件对燕尾榫联接结构创建了参数化实体模型；基于ANSYS软件平台求解弹性接触问题，获得了榫联接结构接触应力及接触状态量的分布；在已有微动疲劳寿命预测模型的基础上，引入载荷频率影响因子，对低周、高低周复合载荷作用下的燕尾榫联接结构进行了微动疲劳寿命的预测，与试验结果对比表明采用本文提出的方法预测榫联接结构的微动疲劳寿命是有效的。

At first,the theory and the happening conditions of cavitation damage are presented,at the same time,the reasons of cavitation damage and the position where the cavitation damage usually takes place are analyzed in tunnel spillways.

首先介绍了空蚀破坏的原理以及发生空蚀破坏的条件，并分析了龙抬头式泄洪洞发生空蚀破坏的原因和易发生空蚀破坏的部位。

The pleasure-pain doctrine was quickly borrowed by economists and applied to the sphere of consumer expenditures in what became the first systematic theory of motivated consumer behavior; the basic economic thesis was that rational consumers would, quite intentionally, manage their purchases of goods

这个所谓&快乐—痛苦&定律很快就被经济学家借鉴，并应用于顾客消费领域，它成为第一个促进顾客消费行为的系统的理论。

First,the theory of the IEEE1588(Precision clock synchronization protocol)is expounded,and then a study of the real synchronization system is discussed.

同时根据对实际同步系统测试结果的分析，提出了同步系统中影响同步精度的几个主要因素。采用系统晶振补偿和O ffsetTime滤波的方法对系统进行了完善，并进一步进行了测试。

Moreover, the first-quantized theory of photons is established, and a quantum-mechanical equation of photons inside a waveguide is presented, these are important for us to study photons locality in three dimensional spaces.

其中给出了光子的一次量子化理论，建立了波导内光子的相对论量子力学方程，这些研究对于光子的空间局域性理论研究有着重要意义。

From the perspective of classical First Amendment theory, some cases are easy.

从经典的美国宪法第一修正案的理论来看，有些事很简单。

So, this dissertation discusses and analysis the following three issues : First, the theory and practice of the radical economic transition model, Shock Therapy; Second, the progress and evaluation of the economic transition of the Czech Republic; Third, the economic crises and opportunities following the economic transition in the Czech Republic.

因此，本文全篇主要探讨与分析下列三个问题：第一，经济转型模式中「震荡疗法」激进转型模式的理论与实务；第二，捷克共和国经济转型历程与成效评估；第三，捷克共和国经济转型后之危机与转机。

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。