原理

During the calculation of the early age temperature field, the early age physical and mechanical performance of concrete varies with its age, therefore in the second chapter we discuss the early age physical and mechanical performance of concrete and its development regulation with time, we emphasize elastic module and the development about the early age strength of concrete varying with time, at the same time consider the effect of shrink and creep upon the early age of concrete, in succession discuss how to confirm the physical parameter of thermodynamics of concrete.

之后讨论了混凝土的热物理参数的确定。为了能够正确合理的应用有限元方法求解早期混凝土温度场问题，第三章论述了求解温度场的有限元方法。第三章首先对热传导的微分方程作了阐述。之后确定温度场的边界条件。本章采用变分原理推导有限单元法计算温度场的公式。因此在第二小节叙述了变分原理，然后阐明了不稳定温度场的计算的三种方法，确定第四章分析中将采用向后差分法求解0#箱梁早期的温度场。

Denialists often claim that HIV has never met "Koch's postulates"- a list of conditions that must be met to prove that a particular infectious agent causes a disease, drawn up by 19th-century German scientist Robert Koch.

反对者们的理由是HIV并不满足&科赫基本原理&——19世纪德国科学家罗伯特·科赫提出的这项原理列举了一系列要证明某种疾病是由某种病原体引发所需的必要条件。

The scanning principle of CT or MRI and the fundamental principle of RPT are logically accordant. Data format conversion and modeling are a key of integrating this two advanced technologies.

CT或MI扫描原理与快速原型技术的基本原理从逻辑上是一致的，数据格式转换和建模是这两种先进技术结合的关键问题。

This paper is based on theories knowledge of the database, compiler implementation, data construction and program design. It mainly makes use of the syntax phrasing system with translation principle to realize the semantic analysis of the search language QL.

论文摘要：本文是基于数据库、编译原理、数据结构、程序设计等理论知识，主要是运用语法制导翻译原理，对数据定义语言中的查询语句进行语义分析与实现。

The methods how to judge the character of anti-peel-back of phenolic resin according to viscosity curve was also anaoyzed.

分析了覆膜砂脱壳的原理以及根据粘度变化曲线判断树脂抗脱壳性的原理。

In the dissertation, I find the informativeness contains the controllability, and the controllability does not contain the informativeness.

在绩效指标的选取中，理论上的指导原则是信息性原理；而实务中常用的指导原则是可控性原理。

In addition, the detailed introduction is given on the endstation of atomic and molecular physics. The formative mechanism of molecular beam is discussed. The theory of time of flight mass spectrometry and multi-photoionization chamber are also discussed in this chapter. Last, the method of data acquisition is described.

另外，对原子分子物理实验站作了具体介绍，讨论了分子束的形成机理、飞行时间质谱仪的设计原理及多级光电离室的原理和结构，给出了该实验站仪器配备情况，并简要介绍了该实验站配套的数据采集方法。

Based on the law of electromagnetic induction, a method to measure the magnetic susceptibility variation of liquid metals was proposed and the instrument was developed. The fundamental of the instrument was also analyzed.

摘 要：提出一种基于电磁感应原理的测量液态金属材料磁化率变化的方法并开发相应装置，分析该装置的基本工作原理。

The DC sensing theory and method based on magnetic potential self-balance and feedback compensation are studied in this paper.

本论文研究了一种基于开环原理与闭环原理相结合的磁势自平衡回馈补偿式直流传感机理与方法及其实现。

Rotating speed detection circuit and inspire current detection circuit principle and magnetic current detection principle of which is similar.

转动速度检测电路和激发电流检测电路的原理和磁场电流检测的原理是相似的。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。