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Response surface methodology was introduced into the cross sectional optimization of truss, in which the stress and displacement constraints were expressed as linear functions dependent on the reciprocals of cross sections.

把响应面方法引入桁架截面优化中，将应力和位移约束近似表达为桁架截面倒变量的线性函数。

The main research contents are as follows:1. Through massive calculation, analysis and comparison, sum up the similarities and differences between the special-shaped cross sections and rectangular cross sections in mechanical features, between reinforced concrete special-shaped columns and rectangular columns in load-bearing capacity, ductility performance and provide necessary basic concepts and data for further understanding the characteristics of the special-shaped columns;2. Through massive elastic calculations and elasto-plastic analysis, under the preconditions of satisfying the code's requirements for axial compression ratio, limit value of lateral displacement and load-bearing capacity of normal section,oblique section and beam-column joint, under circumstances of different intensity of earthquake, structure dead weight, sort of site and column grid bay dimension, the variation regularity of maximum suitable height of structure, and thus sum up the maximum suitable height of structure for code for the purpose of macro-control while deciding the design scheme;3. Make a preliminary study on the stress feature of reinforced concrete special-shaped column and Z-shaped column of which the ratio of limb length to limb thickness is between 4~5 ,and the preliminary design method is suggested;4. Through elato-plastic time history dynamic analysis of typical projects, check up the weak storey of the special-shaped column structure and yielding, breaking and collapse mechanism to satisfy the earthquake resistant requirement to buildings of remaining stand under strong earthquake;5. Derive for project use simplified calculation formula of vibration period, suitable vibration period, suitable rigidity of special-shaped column structure through theoretical analysis, and provide an easy and practical method for deciding the structure scheme economically, safely and reasonably;6. Based on the study achievements in theory and massive analysis and calculations of this paper, sum up the regularities of inner force, deformation of special-shaped column structure and seismic conceptual design, and thus the suggection of seismic design of special-shaped column structures is presented.

本文研究的主要内容如下：通过大量的计算、分析和对比，总结出异形截面与矩形截面在力学特性、钢筋混凝土异形截面柱与矩形截面柱在承载能力、延性性能等方面的异同，为深入了解异形截面柱的特点提供必要的基本概念和数据；通过大量的弹性及弹塑性计算分析，在满足规程对轴压比、侧移限值及正截面、斜截面、节点承载力抗震验算要求的前提下，在不同抗震设防烈度、结构自重、场地类别及柱网开间尺寸情况下最大适宜高度的变化规律，并在此基础上总结归纳出异形柱结构的最大适用高度规定，可用于规程，以便于在确定方案时起到宏观控制的作用；对肢长与肢厚比在4～5的钢筋混凝土异形截面柱及Z形柱的受力特点进行初步探讨，提出初步的设计方法；通过对典型工程的弹塑性动力时程分析，检验异形柱结构的薄弱层及屈服、破坏、倒塌机制，以达到建筑物大震不倒的抗震设防要求；通过理论分析，推导出异形柱结构自振周期，以及适宜自振周期、适宜刚度的工程实用简化计算公式，为经济、安全、合理地确定结构方案提供简便实用的方法；在本文理论分析、计算以及大量的研究成果基础上，总结归纳出异形柱结构内力、变形的规律及抗震概念设计内容，并在此基础上提出异形柱结构的抗震设计建议。

So during monitoring the gel forming in mineral field, for Cr3+ and composite ion cross-linked gel made by produced water and Al3+ cross-linked gel made by fresh water, we advice that the index of viscosity or conventional transition pressure is used to proceed valuation.

当聚合物凝胶体系为区域性网状分子构型时，粘度或传统的转变压力是可以替代阻力系数和残余阻力系数的简单、快捷和有效的评价指标；当聚合物凝胶体系为局部性网状分子构型时，粘度或传统的转变压力指标都很难反映聚合物分子构型特征；在矿场对聚合物凝胶体系成胶效果进行监测时，对于污水配制Cr3+和复合离子交联凝胶体系和清水配制Al3+交联凝胶体系，建议采用粘度或传统转变压力指标进行评价；对于污水配制Al3+交联凝胶体系，建议采用阻力系数和残余阻力系数或本课题提出的转变压力指标进行评价。

The result shows that the effective cross-link fraction of the cross-linkers in copolymerization gels is, in general, very low.

结果表明：共聚合成的凝胶网络中，有效交联分数普遍较低。

Besides, the organic cross-link system and dualistic organic cross-link system developed can enhance oil recovery greatly, separately enhancing recovery by about 12 and 35 percent.

应用情况表明，研制的弱交联凝胶有机交联体系和有机复合交联体系能够大幅度提高采收率，可分别提高采收率12％和35％左右。

Their catalytic activity effects not only the formation of cross-links but also desulfuration of polysulfides and decomposition of cross-link.

后来将这种使橡胶线型长链分子通过化学交联而形成三维网状结构的过程称为硫化[3]。

The suitable experimental conditions for the swelling test to determine the cross-link density of NEPE propellant were studied to analyze the relations between the cross-link network and the mechanical properties of the propellant.

为分析NEPE推进剂的交联网络与推进剂性能的相互关系，研究了溶胀法的试验条件对推进剂相对交联密度的影响。

Full automation control for all track and effect variables using keyframes (cropping, zooming, panning, volume, rotation, opacity, key-color etc...)- Full cross integration of audio and video.(noise gates triggering video effects. video brightness controlling volume etc.) Here is an example video.- Looping of both audio and video signals simultaneously, with adjustable cross-fade on loop boundaries.

而 ZS4 的使用方式也相当简单，它是采用时间滚动条的方式来进行编辑的，让使用者能够把影片、声音或是图片加入时间滚动条中的任一个时刻，并且设定播放的速度以及时间间隔，如此就能完成一部影片了。

While letters "cross in the mail" in days, faxes and emails "cross in the wires" in hours and minutes.

传统邮件在邮路上的传输时间以日表示，而传真和电子邮件在电线上的传输时间以时、分表示。

While letters "cross in the mail" in days, faxes and emails "cross in the wires" in hours and minutes.

因为传统邮件传递可能要几天，但传真和电子杂志的传递则只需要几个小时或几分钟。

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。