以...作基础

Based on the solution for incompressible materials, the asymptotic solution of the order up to ∈~2 is obtained.

第一种方法以学术界普遍接受的高玉臣与Rice等的不可压缩(ν=1/2)理想弹塑性扩展裂纹尖端场为基础，以ε=1/2-ν为小参数作摄动展开，得到了直到ε~2阶的渐近解。

To give the definition of the mass concrete and to concrete\'s cracks together with practical meanings of control ,and give a brief review on the research in the field at home and abroad, at last, methods to control temperature crack of the mass concrete from several aspects such as design measures,concrets material, construction schedules.etc are summed up; To explain the physical mechanics of the concrete and computing methods-Difference Method and Finite Element Method, and illustrate the application of their specific methods repectively;Several temperature factors that can influence the temperature stress of mass concrete baseplate are analyzed. The influence degree of temperature factor can be got through the ANSYS simulation computation the control of temperature can control the temperature stress, consequently control the temperature crack of mass concert baseplate; through the influence of the crack resistance ability of mass concrete baseplate which takes the reinforcement as a part is analyzed. By ANSYS simulation, the best suited volume ratio of reinforcement is found out, at same time the layout of reinforcement with the same volume ratio can also affect the resistance ability of mass concrete baseplate. Sum up of above analysis, anti-crack function of steel bar in early mass concrete baseplate is obvious, so it\'s necessary to consider beneficial effect of construction steel bar in research of temperature control on mass concrete baseplate.

本文先容了大体积混凝土及混凝土裂缝的基本概念，对国内外在这个领域里的研究现状作了扼要叙述，并从结构设计、混凝土材质、施工措施等方面总结了大体积混凝土温度裂缝控制的方法及防止措施；阐述了混凝土的基本物理力学性能，总结了大体积混凝土温度计算的方法——差分法和有限元法，并分别举例说明其具体应用的方法；分析了影响大体积混凝土底板温度应力的几种温度因素，利用ANSYS模拟计算，得出了每种因素的影响程度，通过分析提出了在这几种温度影响因素下如何通过控制温度以达到控制温度应力从而来控制裂缝的具体建议；针对大体积混凝土基础底板中配筋的不同对混凝土底板抗裂能力的影响不同，利用ANSYS进行模拟分析，得出底板中最合适的体积配筋率，同时分析了在相同体积配筋率下钢筋的具体布置对大体积混凝土基础底板抗裂能力的影响，分析表明，配置钢筋对混凝土结构的开裂阻止作用明显，在研究大体积混凝土温度裂缝题目时，要考虑钢筋在其中的有利作用。

According to the demand of high magnetic field power supply, reference is increased with a set ramp rate and stops at a set stable value, so reference system is composed of digital setting and digit to analog converting circuit. But the stability of reference is mostly guaranteed by the performance of D/A circuit, so D/A circuit is particularly studied in reference system. The scheme of D/A circuit, the selection of DAC and its voltage reference, hardware anti-jamming design and PCB design are discussed in detail, and software of remote control and PLC are discussed in brief. Zero-flux DC current transformer well satisfies the demands of the high stability of Load current detection unit, so the principle of zero-flux DC current transformer is analyzed; in the mean time a project which detects the long term stability is designed. During 8 hours, analog signal which is detected with high precision digit multimeter is recorded in computer at 1HZ frequency by GPIB communication. The drift error source and related parameters are explained in the compare-amplify part. Detailed subtraction circuit is designed; also amplifier chip and periphery components are selected and verified according to the theory of error analysis.

根据强磁场电源的需求，参考源应按照软件设定的斜率逐渐上升到设定稳态值，则参考源系统应由数字给定和数模转换电路两大部分组成，而参考源的稳定度主要依靠完成数模转换功能的模拟电路的性能来保证，因此本文对参考源系统的研究以数模转换电路为重点，分别从电路方案的确定、数模转换芯片及其基准电压源的选取和验证、电路板硬件抗干扰和PCB设计几方面进行了论述，然后对数字给定部分的远控组态和PLC程序设计作了简要介绍；采用零磁通原理的直流电流转换器很好地满足了对负载电流检测单元高稳定度的需求，本文详细分析了零磁通检测的原理，并在选定此种类型电流转换器的基础上设计了一套检测长期稳定度的方案，8小时内以1秒为采样周期，通过计算机Labview程序和高精度数字电压表的GPIB通讯，将被高精度数字电压表数字化后的模拟信号采样值连续记录至计算机中；比较放大环节简要阐述了漂移产生的原因和相关参数指标，确定了具体的减法电路形式，并根据误差分析理论对运算放大器和外围元器件进行了选取和验证。

Through the results of surveys, this article modeled a generalized phenomenon of a conventional wedding ceremony corresponding to socioeconomic background, and divided the period into four sub-periods. This article took time as the ordinate axis and investigated the wedding ceremony and instruments across history. Based on the conventional wedding model, we tried to observe the veins of change and analysis the cultural significance.

依据调查结果，将传统婚俗的普遍现象整理出一个模式，再将婚俗型态相近者划分为同一时期，同时，配合其社经背景将整个婚俗变迁的过程分为四个时期，全文以时间为纵轴；以婚俗仪式及器物作横向探讨，在传统婚俗模式的基础上，进行四个时期的比较，目的在观察该区婚俗变迁之脉络，并分析其内在文化意涵。

Actually she definitely may use another way life, but, Cong Jiaque chose has made the gambling stake by the body, take the sentiment as the sacrifice, led the way the foundation the emotion and the human body achievement.

其实她完全可以用另一种方式生活，但是，丛佳却选择了以身体作赌注，以感情为牺牲，把情感和肉体作为前行的基础。

In short, this explorative study for self-identity concept, theory and practice is for the purpose of (1) trying to unitarily understand self-identity concept, in turn to minutely examine the new development of self-identity theory, and to introduce self-identity theories and research methods in western psychology to domestic psychology in order to cause the interest of domestic psychologist to self-identity thesis; and (2) through the empirical study on self-identity of college student, revealing the meaning of self-identity to student development, and the personality characteristics of self-identity status of student, and the characteristics and influential factors of student self-identity development, and the relationship between student self-identity status and mental health condition in order to provide the measurement of empirical study and systematic study data for self-identity researches, in turn to provide basis of theory and method for setting up the theoretical model of Chinese students self-identity; and (3) making up the gaps in empirical researches on self-identity in domestic psychology, opening up a new research domain in colleges and universities student psychology, and enrich the theory on student development researches.

总之，本文对自我同一性概念、理论和实践进行探索性研究，旨在(1)尝试对自我同一性作整合统一的理解并在此基础上，详细考察自我同一性理论的新发展，试图将西方心理学自我同一性理论的发展引入国内心理学，以引起国内学者更多的关注；(2)通过对大学生自我同一性的研究，揭示自我同一性对大学生发展的含义、大学生自我同一性状态的人格特征、大学生自我同一性发展的特征和影响因素、大学生自我同一性状态与心理健康水平的关系，进而为自我同一性的研究提供实证研究的测量工具以及系统的实证资料，为建立中国大学生自我同一性的理论模型提供理论和方法上的基础；(3)弥补国内自我同一性实证研究的空白，开辟大学生心理学研究的新领域，丰富大学生发展研究的理论；(4)当代大学生自我同一性问题的研究既是青年心理学、教育心理学和学校心理学的重要课题，也能为大学生发展和大学教育实践提供心理学依据，特别是在强调创新教育和推进大学素质教育的今天具有重要的实践意义。

Chapter 7: The COD〓 distribution in Yangtze River is researched, especially the diffusive coefficient and decay coefficient.

第七章，在流场计算的基础上，以某一流线作边界，重新划分网格，结合环境流体力学的特点对COD浓度的对流、扩散问题进行了专门研究，结合长江及其支流的大量实地资料对扩散系数、衰减系数进行了统计研究及模型率定，得出了一些合理的参数为以后进一步的研究打下了良好的基础。

Jiyou768 was selected and bred from the hybridized combination between Line 326 and Line 322.The female parent Line326 possessed Bt toxic protein gene,and the male parent Line 322 possessed sea-island cotton,upland cotton and wild cotton genetic background.

冀优768是利用携带有外源抗棉铃虫Bt基因的326作母本，以具有海岛棉、陆地棉、野生棉遗传基础的322系作父本，其后代在黄枯萎混生重病地、不防治棉铃虫的高压胁迫下，经过连续定向选择育成。

Materials And Methods 1, The animal model of Sprague-Dawley rat for maxillary protraction was made in this study, and an appliance based on the principle of protraction headgear was designed and made for maxillary protraction treatment which was hooked over the front of the zygomatic arch ,and a hole was made on the skull in the experimental group rat .

以面具式前牵引矫治器为原理制作特殊的前牵引支架，以外科方法安装支架挂在大鼠颧弓前端，在实验加力组大鼠头颅上打孔，安放挂钩，通过弹性牵引提供支架向前牵引的支抗。2、以该动物模型为基础，选用90只五周龄的Sprague—Dawley健康雌性大鼠作实验动物，随机分到实验加力组、正常对照组、手术对照组。

By studying comprehensively the distribution, formal characteristics and function of the diminutive of YBTH, the dissertation shows the basic features of the diminutive of YBTH and analyses objectively internal relations and development skeleton of the three kinds of diminutives in YBTH.

本文拟对这三种不同形式小称的分布、形式特点及其功能作较为详细的描写，以展示粤北土话小称的基本面貌，并在这一基础上对粤北土话三种小称形式的内在联系及其发展脉络作客观的分析。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。