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A synthetic hexaploidy wheat with resistant to preharvest sprout and hard glume was employed to cross with a common wheat line with character of susceptible to preharvest sprout and normal glume hardness, and then built up the F3 population, aiming at studying the relationship between the resistance to preharvest sprout and its glume hardness.

本研究利用抗穗发芽、硬颖壳的人工合成小麦与正常颖壳硬度、穗发芽的普通小麦杂交构建的杂种F3代群体，研究穗发芽与颖壳硬度之间的关系。

However, common polyacrylate emulsion has some disadvantages such as poor water-resistance, poor film-forming in low temperature, becoming pastiness in high temperature, polluting environment with emulsifier and so on.

由于聚丙烯酸酯乳液具有耐热、耐光和耐老化等优点在涂料工业中得到了广泛的应用，但普通的聚丙烯酸酯乳液还存在耐水性差、低温下不易成膜、高温发粘以及含乳化剂的废液会对环境造成污染等缺点，因此，本文结合无皂乳液聚合和核壳乳液聚合技术，合成了聚丙烯酸丁酯/丙烯酸钠齐聚物，并以此为乳化剂，采用种子半连续法合成了以聚丙烯酸丁酯为核，聚甲基丙烯酸甲酯-苯乙烯为壳的无皂核壳聚丙烯酸酯乳液。

The nonlinear dynamic behaviors of a single layer reticulated spherical shell were investigated.

重点研究了单层球面网壳的非线性动力回应行为，对网壳结构在地震作用下的动力失稳状态以及倒塌现象作了理论上的研究，为"结构倒塌"作出了合理的定义，并进而探讨了网壳结构失稳机理。

It is concerned with the optimal design of cylindrical shell on minimax deflection and minimal compliancy with arbitrary axisymmetrical boundary conditions and radial pressure, under the condition of the volume being constant.

研究在任意轴对称边界条件下和任意轴对称分布载荷作用下体积保持常数的圆柱壳的两类优化设计问题：极小化圆柱壳的最大挠度和极小化圆柱壳的柔度。

Through simple correlation and progressive regression analysis, with circs of leaves growth, sets up the mathematical simulation model between diameter, height growth of Calophyllum inophyllum L. and meteorological conditions, educes the appropriate meteorological conditions indexes of Calophyllum inophyllum L..

通过简单相关及逐步回归分析，建立了红厚壳的围径、株高生长量与气象条件间的数学模拟模型，结合红厚壳叶片的生长情况，得出了红厚壳生长适宜的气象条件指标。

Thiscontributes greatly to t he uncertainty of the research result, and limits the use of cosmogenic nuclides in theresearch on soil and weathering profile.

简要介绍了土壤和风化壳剖面中宇成核素的收支情况和累积，并通过几个实例介绍了国外和境外一些土壤和风化壳的宇成核素研究情况：土壤和风化壳的年龄和表面侵蚀速率，坡地土壤的生成速率和蠕滑速率，土壤面的地貌演化过程，以及一些土壤侵蚀事件研究。

The filter includes a cavity formed by metal hull, the inner of the cavity has a PCB double-faced board which fixed at the side wall of the metal hull, between the up and down inner wall there has a certain air height; one side of PCB double-faced board etches cross nodel line transmission line with destined type.

滤波器包括由金属壳形成的一腔体，腔体内设置一PCB双面板，PCB双面板固定在金属壳的侧壁上，与金属壳的上下内壁具有一定空气高度；PCB双面板的一面蚀刻有预定形状的十字节级联传输线。

The results for the double-ayered show that, owing to the presence of concrete outer layer of the shell, the maximum boundary stress of steel is reduced to about 20—25%, and the pressure distribution between these two layers takes the sha...

在此基础上，作者提出了计算双层蜗壳的近似方法。在三夹层蜗壳的试验中，测量了内外层钢板的应力，发现这种结构不仅在工艺上有其特点，而且能在很大程度上消除蜗壳边界的应力高峯。

Based on the pattern of partial double-layer LICS, different analysis models of nonlinear, linear, rigid joint and pin joint were compared, linear property of double-layer region and nonlinear property of single-layer region was disclosed, and then a nonlinear-linear combine method was put forward with a definite object in view.

针对局部双层叉筒网壳的布局特点，本文对局部双层叉筒网壳进行了非线性、线性、刚接、铰接等多种分析方法的比较，揭示了双层区域的线性性质和单层区域的非线性性质，进而有的放矢地提出了&非线性-线性联合&这种适合局部双层网壳分析的合理、准确、高效的方法。

An energy-saving lamps to determine if it is safe to bring it close look at the hands of six areas: head and a combination of plastic parts is tight; tube and plastic parts under the shell is a solid combination; on shell plastic parts Plastic shell and the next bit is fastening cards, whether from a high temperature; shell plastic parts whether or not to use flame-retardant high temperature (180 ℃) Materials; electronic ballast circuit of the skeleton, whether or not the use of fire-retardant PCB Materials .

判断一只节能灯是否安全，要拿在手中仔细观察6个方面：灯头与塑件的结合是否紧；灯管与下壳的塑件结合是否牢靠；上壳塑件与下壳塑件卡位是否紧固，高温下是否能脱离；外壳塑件是否采用阻燃耐高温（180℃）材料；电子镇流器线路中的骨架、线路板有无采用阻燃材料。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。