参数变化

This paper presented the research and exploration of mechanism and technics as well as the design of the magnetic circuit of this new compound machining, based on above, establishing the parameter model, meantime, analyzing influential effects on productivity of magnetic and EDM compound machining the holes through large numbers of experiments, including velcoity contrast experiments of pre-compound and after-compound machining with the change of current, velcoity contrast experiments of pre-compound and after-compound machining with the change of magnetic induction, velcoity contrast experiments of pre-compound and after-compound machining with the change of impulse width, experiments of the superficial roughness, experiments of the Electrode wastage, and intersectant experiments analysis as well as the change experiments of current waveforms. Through a number of experiments we analysed the influential effects of magnetic and EDM compound machining, compared the factors with EDM by oneself. A large of experiment records and deducibility have demonstrated that the productivity of magnetic and EDM compound machining is developed by 20%～400% than traditional EDM.

本论文对磁场电火花复合加工这种新的复合加工的机理、工艺和复合加工的磁路设计进行了研究和探索，在此基础上，建立了磁场电火花复合加工的参数模型，同时通过大量的随着电流变化磁场电火花复合前后加工速度对比实验、磁感应强度变化时的加工速度变化实验、随脉冲宽度变化的加工速度实验、表面粗糙度实验、电极损耗量实验、磁场电火花复合加工正交实验分析、电流波形变化等实验，实验分析了影响磁场电火花小孔加工效率的因素，并且跟单一的电火花加工中的影响因数进行了比较，大量的实验数据和理论推导证明磁场电火花复合加工比传统的单一电火花加工的效率提高了20％～400％左右。

Then a part family model supporting PSV and MSV was put forward aiming at the variety in parameter tier.

针对参数层变化性，提出了一种支持产品结构变化性和制造结构变化性的零件族模型，并通过一个实例进行了验证，结果表明，基于VRP的产品变化性在提供多样化产品的同时，可以有效控制产品成本、缩短产品交货期。

The critical nitrogen content in heading period was used to calculate the biggest accumulation quantity of nitrogen. The latent distribution index of leaf and stem, which was the variety heredity parameter, were used to distinguish the difference in nitrogen assignment in different varieties. The dynamic content of the nitrogen accumulation before anthesis could be described with a Richards model. The dynamic content of the nitrogen remobilization in leaf with leaf area index could be described with a power model, and the nitrogen absorption of grain from soil with dry weight could be described with a power model. The dynamic content of nitrogen density in stem and spike with physiological development time could be described with a nonlinear model.

模型利用抽穗期植株临界含氮量来表达氮素最大积累量，引入叶片潜在分配指数和茎鞘潜在分配指数2个品种遗传参数来区别不同品种在器官间的氮素分配差异，采用Richards方程来描述大麦花前氮素积累动态变化；采用指数函数方程来描述叶片氮的转移量随叶面积指数的动态变化以及籽粒从土壤中吸收的氮量随干物重的动态变化；采用非线性函数方程描述茎鞘和穗部的氮浓度随生理发育时间的动态变化。

After the rigidity matrix calculations, the FEM analysis program ANSYS is used to create models, with the truss structure and box cross-sectioned cantilever board beam as models.

在完成结构刚度矩阵计算的前提下，以桁架结构和矩形截面悬臂板为模型，利用有限元程序ANSYS进行建模，分析了不同类型的结构在温度变化作用下的响应，从而得知温度变化对桁架结构的模态参数影响不大，而对矩形截面悬臂板梁的模态参数有一定的影响。

Regulation of the alternation of the postoperative measuring value of the breast and corelative area is the objective designing basement to estimate the postoperative effect and to instruct the clinical routine .

为了掌握隆乳术后乳房及相关部位体表参数的变化规律，借以为手术设计提供依据，预测术后效果，指导临床工作。通过对受术者进行术前、术后乳房及相关部位体表测量，应用GRAFTOOL软件对数据进行分析，获得标准体形及身高与胸围的关系曲线和隆乳术前后经乳头胸围标准参数的变化数值。

And objective parameters (texturized degree, color, hardness, springiness, chewing, water absorption, yield, etc.) were investigated in the high moisture soy protein extrusion process, and the statistical models of system and objective parameters were built, using the step-by-step regression analysis; A comprehensive evaluation of the products, and the process optimization of high moisture extrusion were obtained,using factor analysis; Secondly, residence time distribution and soy isoflavones losses kinetics were studied in the high moisture extrusion; Finally, chemical bonding process, the micro-structure and protein secondary structure changes were investigated in the texturization of soy protein, then the mechanism assumptions of texturization soy protein by moisture extrusion were proposed.

本文对大豆蛋白高水分挤压组织化技术和机理进行了研究，研究内容包括：首先采用系统分析法，研究了大豆蛋白高水分挤压过程中，挤压机操作参数(螺杆转速、物料水分、喂料速度和机筒温度)对系统参数(系统压力、扭矩、单位机械能等)、目标参数(组织化度、色泽、硬度、弹性、咀嚼性、吸水率、产量等)的影响规律，建立了各因变参数的统计模型；采用因子分析法对产品进行了综合评价，并对高水分挤压组织化工艺进行了优化；其次，研究了大豆蛋白高水分挤压中的停留时间分布以及大豆异黄酮的损失动力学；最后，研究了大豆蛋白组织化过程中化学键、微观结构和蛋白质二级结构的变化规律，提出了大豆蛋白高水分挤压组织化的机理假设。

The interval finite element analysis method is extended from one-dimension truss member and beam structure to two-dimension plane structure.3 Genetic algorithm has powerful capability of global search and lower capability of local search, however, simulated annealing algorithm has powerful capability of local search and lower capability of global search.

5为了解某一参数的变化对结构响应的影响程度，提出了参数敏感性的区间分析方法，可以获得模型参数对决策目标的敏感性因子矩阵；通过对一平面应变结构地基模型的分析，得出了土体Duncan-Chang E_t-ν_t模型的八个参数的敏感性因子矩阵。

According to a torque feedback rate gyro,it designs the rebalance loop.The experimentation concludes the change tendency of parameter of the head of meter in different input frequency,so that the change tendency of damping ratio and torsion pendulum in the whole frequency is determined.

针对某力矩反馈速率陀螺仪设计了再平衡回路，试验确定了不同输入频率下陀螺表头参数的变化趋势，从而得出陀螺的主要性能参数阻尼比及转动惯量在整个频段内的变化趋势。

Under spraying humidification state, the parameters of JYPW-1 spraying axial fans for textile enterprises such as flow, total pressure, efficiency, shaft power and acoustic power level changing with water-air ratio were tested, and the performance parameter curve changing with water-air ratio was obtained. The approximate formula of its pneumatic performance in different water-air ratio condition were deduced which can be referenced for of selection and project application.

在喷雾加湿工况下，对纺织空调系统所用的JYPW-1型喷雾轴流通风机的流量、全压、全压效率、轴功率和比A声级噪声等性能参数随喷淋水气比的变化进行了测试，得到了喷雾风机性能参数随水气比变化的曲线，并整理出喷雾风机在不同水气比时，其气动性能的近似计算公式，可供喷雾风机选型和工程应用时参考。

The expression of space-charge field is given out in the paper with two time constants τpa and τpb. When considering and not considering the photovoltaic effect, the diagrams of the two time constants as a function of irradiance in units of 1/ are the same.

理论研究表明，空间电荷场的形成和擦除与两个时间参数有关，在考虑或者不考虑光生伏打效应两种情况下，这两个参数随擦除光强的变化有基本相同的变化规律，光栅的写入和擦除有相同的结果。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。