Investigating from the component of the cost , the expenditure of the labor share about 60 % in the total cost . the result also tells us the production of the china ' s oil crops is labor - intensive , and the degree of the mechanization is very low . using the method of econometrical , the technical efficiency ( te ) , the resources allocation efficiency ( ae ) and economy efficiency ( ee ) are calculated for each main province from 1993 to 1998 从我国油料作物生产投入的成本结构来看，我国油料作物的生产成本中劳动力的投入占据了较大的比重，平均在60的水平；而就是在较小比例物质费用的投入当中，以种子、肥料、农药为主的直接费用又占有85以上的比例，代表机械化程度的间接费用(资本折旧费、农具修理费等)只占有很小的一部分比例。
The volume of sweeping is calculated for evaluating the necessary assembly space . in chapter 4 , several characteristics of collision detection are clarified . based on layered envelops bounding box and subdividing the set of the possible interference components step by step , swiftly dynamic interference checking is carried out 第四章分析了虚拟装配中干涉检测的特点，通过不可能干涉对象的快速筛选、基于零件级和装配体级多层次包围盒树的方法、通过基本几何元素之间精确相交测试，实现了零件静态干涉检测、运动零件与虚拟装配环境中环境对象间的动态干涉检测方法。
The strain softening of dam body and foundation is the necessary condition for dam instability . according to observation data of dam cracks , a gray cusp catastrophe model is established to judge the stability of the crack . according to the slope observation data of a certain hydropower plant , a nonlinear dynamic model is developed by means of reversion and the lyapunov exponent spectrum , and the lyapunov information dimension are calculated for judgement of the stability of the slope （ 5 ）基于变分原理，研究建立了能量形式的失稳准则，并说明坝体、岩基的材料具有应变软化的性质，是大坝失稳的必要条件；并利用大坝的裂缝实测资料，建立了相应的灰色尖点突变模型，由此判断裂缝的稳定性；根据某水电站库区滑坡体的变形实测资料，反演其非线性动力学模型，进而计算lyapunov指数谱、 lyapunov信息维来判定边坡的稳定性及稳定程度。
Presented in this paper is the investigation of some problems existing in the far - field method widely used in hpm measurement . first , the errors are analyzed from the practical calculation of the directivity for the radiation of the te11 mode in the circular waveguide . secondly , the results obtained from simulation and experiments are compared with each other on the effective area of the receiving antenna of certain types , and the power capacity are calculated for these antenna 首先,对圆波导te11主模辐射方向性系数实际计算中存在的误差进行了分析;其次,对一些型号的接收喇叭有效面积进行了模拟和实测对比,并通过计算给出了这些型号的接收喇叭的功率容量;最后,实验测定了微波脉宽对一些微波器件? ?同轴型检波器、同轴型衰减器及微波电缆性能的影响。
In this paper a newly develoed helical coordinates is used to make out the solution of electromagnetic fields in the helix gap and calculate dispersion characteristics of tape helix slow wave structure for the first time . strict boundary conditions for magnetic fields are adopted and are treated rigorously by fourier expansion . besides , the radial propagation constant of every layer in the dielectric - loaded region is differentiated . some of practical tape helix slow wave structures have been calculated for dispersion characteristics and the calculated values accord with measured values very well . the authors also compare the calculated results with experiments for different structures by changing tape thickness or other structure parameters and find that the theory in the paper is universal 本文首次运用螺旋坐标系给出了带状螺旋线缝隙内的电磁场解，并据此计算了带状螺旋慢波结构的色散特性.文中采用了严格的边界条件，并以傅立叶展开进行了严格的数学处理.另外还首次对有介质区域内各层的径向传输系数作了区别.本文使用这种方法计算了我们已研制的一些宽带高功率行波管所用的慢波线结构的色散特性，理论与实验符合得很好.我们还计算了不同结构参数对色散特性的影响，并与实验作了对照，发现本文的理论有一定的普适性
If the permission state used in the imperative demand , link demand , assert , permit only , or deny can be determined statically , and it is certain to be not dependent on any state available only at run time , then the effect of such security action on application assemblies can be determined and is calculated for the effects of declarative security actions on the minimum grant permission set of all profiled assemblies 如果可以静态确定在命令性要求、链接要求、断言、只允许或拒绝中使用的权限状态，并且确认该状态不依赖于运行时的任何可用状态，则可以确定此类安全操作对应用程序程序集的影响，并可以计算出声明性安全操作对所有已配置程序集的最低授予权限集的影响。
