精确地

The crystal structure of trioxane was accurately determinated. By using the crystal structure model of trioxane, the ring-opening polymerization mechanism of trioxane by γ-irradiation may be fairly well explained. Polyoxymethylene obtained by solid state polymerization of trioxane may have two types of molecular chains with different orientations, one parallel to the C...

我们精确测定了三聚甲醛的晶体结构，利用三聚甲醛晶体结构模型，可以很好地阐明三聚甲醛在受到γ射线辐照后开环聚合的机理，由三聚甲醛晶体固相聚合得到的聚三聚甲醛，应该有两种不同取向的分子链，一种与三聚甲醛的c轴平行；另一种与c轴成75°37′的交角。

The boy was startled by the preciseness of the date and he repeated it before he asked,"How did it come about?"

男孩惊讶于这个精确的年份，口中不由地重复了一遍。然后他问："那是怎么发生的？"

The main advantage of factory-industrialized building is that the prefabricate d units can be produced to a very high standard of precision and a consistently high quality.

工业化建筑的主要优点是能相当精确、始终高质量地生产预制构件。

Therefore,a series studies of ice-pier vibration are performed from different aspects in this paper.The main work of this his thesis is summarized as follows:(1) Ice response spectra is proposed based on the idea of a seismic response spectra analysis of str .. uctures.Firstly,ice response spectra on the basis of power spectra density function is established;Secondly,based on the assumption of quadratic parabolic interpolation method,the nonlinear interpolation analysis method of ice response spectra is studied from both theoretical and practical points of view,and the successive computation formulas including ice displacement,velocity and acceleration response spectrum are deduced by Duhamel integral.Furthermore,to analyze the effectivity and applicability of the method, the real temporal curves of ice pressure are used to be studied.The results show that the presented method is more convenient and accurate to study the structural response induced by ice force,also it can be effectively applied in the design of ice resistance.

鉴于此，本文针对冰激桥墩结构振动问题从不同方面展开了一系列与之相关的研究，主要研究内容如下：(1)根据结构抗震反应分析思想提出了冰振反应谱，首先建立了基于功率谱密度函数的冰振反应谱；其次借鉴地震反应谱内插法的思想从理论和实际观点出发，假定在等距离微小时间间隔内冰荷载按二次抛物线规律变化，由Duhamel积分推导出冰振位移、速度以及加速度反应谱的一系列连锁公式，建立了基于非线性内插法的冰振反应谱，并利用实际冰压力时程曲线进行了冰振反应谱数值分析，为以后冰激结构振动的研究提供一种方便、简捷、精确的分析方法，也能够将其有效地应用到结构的抗冰计算中。

Integrating C-type of traveling wave location method with AC signal injection method, a compositive location method for single-phase earth fault in 35kV distribution network is proposed, in which firstly the fault is presumedly located by C-type of traveling wave location method to preliminarily determine the position where fault occurs; then the fault is accurately located by AC signal injection method.

基于C型行波法和交流信号注入法提出35 kV配电网单相接地故障的综合定位方法：首先采用C型行波法进行初步定位，确定故障距离和故障所在区段，然后用交流信号注入法进行精确定位。

We put forward a kind of filter frequency selective constructing rule which is based on correlation of filter"s frequency response integration,and took a prime sequence as Gabor filter bank"s wavelengths.As a result,we realized a novel effective scale-adaptive algorithm,which could effectively achieve high accuracy and wide disparity range.

我们针对多尺度滤波器的构造问题提出了一种基于频率响应积分面积相关的选择规则，并采用质数序列作为Gabor滤波器组的波长，实现了一种新颖高效的尺度自适应算法，不仅能够鲁棒地得到精确的视差估计，且能预测很大的视差范围，而且具有很高的计算效率。

Experimental results show that the method can compute path domain more accurately than PRT method, and random testing efficiency can thus be remarkably enhanced.

结果表明，该方法计算出的路径输入域更加精确，可有效地减少对无效域的测试生成，提高了随机测试的效率。

It also states that students "should know how to use quadratic functions to solve extremum problems in everyday life". It seems to me that befe all these, students should be properly taught the technique of completing the square (which underlies the solution of extremum problems of any kind) and the quadratic formula (which would then give *exact* solutions of quadratic equations).

我认为，在学习这些之前，应该适当地教给学生配平方的技巧（它是解决任何最值问题的基础），以及二次求根公式（它能给出二次方程的精确解）。

If want to make quadrupole mass spectrometer work high-efficient、accurate and conveniently, must make it is work with the computer , finish relevant data gathering and data processing.

要使四极质谱计系统能够高效、精确、方便地工作，必须使之与计算机联用，完成相关的数据采集和数据处理。

A new method to accurately and quantitatively study the chemical durability of glass was put forward.

提出了一种精确定量地研究玻璃化学稳定性的新方法。

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。