参数变量

Firstly, based on the force acting on a single-particle, establish a discriminant formula of the sand threshold, and prove that the sand threshold belongs to the cusp catastrophe. Then establish the basic equation of the cusp catastrophe using coordinate transformation and catastrophe theory. Finally, while particle Reynold number and equivalend diameter are the state variables and Shields parameter is the control variables, we can obtain the model of cusp catastrophe of sand threshold, putting those variables into the basic equations of the cusp catastrophe. The model is derived from the mathematics, which has a certain mathematical theory foundation.

首先从单颗沙粒受力分析出发，建立沙床沙粒起动条件判别公式，进而证明了风沙起动属于尖点型突变；然后通过坐标变换和突变理论建立了尖点突变的基本方程；最后本文选择颗粒雷诺数和等效粒径作为控制变量，希尔兹参数作为状态变量，并把它们代入尖点突变的基本方程，经过拓扑变换得到风沙起动的尖点突变模型，并与前人的公式及实验数据进行比较。

Then, in 1996, a man named Chris Nystrom took that code, and ported it to Standard C. However, it was a very literal port (much like Mr. Birken's C# version): virtually all variables are global, maintaining their cryptic one or two letter names, and nearly all functions pass their parameters and return values using global variables.

然后，在1996年，名为克里斯尼斯特伦1名男子的代码，并把它移植到标准长不过，这是一个非常字面端口（很像比尔肯先生的C＃版）：几乎所有的变量是全局，保持其神秘的一个或两个字母的名字，几乎所有的功能，通过其参数和返回值使用全局变量。

As an example,the study about slider-crank mechanism is provided to show the relationship between joint-gap and kinematical reliability of mechanism.

所以，在上述影响因素为随机变量的情况下，机构运动规律的输出参数也是一个多元随机变量。

Through adding new state variable and using supplement functions,the problem with restriction conditions was converted into nonrestriction problem.

通过增加新的状态变量和用补偿函数法，将本课题的有约束条件问题化为无约束条件问题，并提出了最优步长参数的动态搜索法来修改传统的梯度法，从而较完善地解决了多变量最优周期控制的计算问题。

Through adding new state variable and using supplement functions,the problem with restriction conditions was converted into nonrestriction problem.In addition,the dynamic searching method of optimal step coefficient was developed to modify the conventional gradient method,consequently the calculation problem of the multivariable optimal periodic control was able to be resolved better.

通过增加新的状态变量和用补偿函数法，将本课题的有约束条件问题化为无约束条件问题，并提出了最优步长参数的动态搜索法来修改传统的梯度法，从而较完善地解决了多变量最优周期控制的计算问题。

The damage represents complex mechanism. In this research based on T300/HT3 laminate structure, fatigue life is predicted phenomenologically, dealing mainly with in-plane stresses without accounting for out-of-plane failures such as craze. Fatigue modulus, based on damage mechanics, is used as a physical parameter which helps to describe the basic fatigue behaviors of unidirectional laminates and obtain expressions for cumulative damages defined by strains and stress. Based on some typical fatigue test data for unidirectional composite laminates, residual modulus sequence is found out.

本文以T300/HT3复合材料层压结构为研究对象，从唯象的观点出发，以损伤力学为基础构造损伤函数，考虑了剩余刚度和应变比率对复合材料的疲劳性能的影响，以这些变化着的机械性能作为损伤变量，建立了复合材料的疲劳损伤模型，基于层压板拉—拉疲劳试验数据，拟合出损伤模型中的参数，从而得到层压板拉—拉疲劳损伤变化规律，并建立损伤变量与内部损伤及疲劳寿命的联系，从而预测常幅应力作用下疲劳寿命。

For the process of synthesizing of Phosphonic Acid Dimethyl, the significance of application of MSPC on it is discussed, the parameters and original data are deduced and estimated, and process monitoring and diagnostic simulation are given based on simplified model.

对于亚磷酸二甲酯生产过程，论述了对其进行多变量统计过程控制的意义，对该生产过程的物性参数和初始数据进行了推导和估计，并在经过简化的生产控制模型基础上进行了多变量统计过程监控和诊断仿真。

Many template tags take a single argumenta string or a template variable referenceand return a string after doing some processing based solely on the input argument and some external information.

许多模板标签接收单一的字符串参数或者一个模板变量引用，然后独立地根据输入变量和一些其它外部信息进行处理并返回一个字符串。

Prefer using named variables, not temporaries, as constructor parameters.

尽量使用定义的变量，而不是临时变量作为构造函数的参数。

In the design procedure, we do not need to know the specific values of the system parameters . We only require that the member functions of the input variable are triangular-shaped and the central values of the output variable member functions are selected in order to satisfy the stability expressions.

在模糊控制器的设计过程中，不需要知道对象的系统参数（A，b，c或A，B，C）的具体值，而只要求输入变量的隶属函数为三角形和输出变量的隶属函数中心值的取值满足稳定性条件所要求的关系式。

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。