查询词典 function variable

What is achieved by prefixing the 'static' keyword to a file-level function or file-level variable declaration?

字面理解：使用static修饰词使函数和变量具有文件作用域的目的是什么？

The life of the variable is determined by the life of the function.

变量的值是由函数的值决定的。

The part of calculus that deals with the variation of a function with respect to changes in the independent variable by means of the concepts of derivative and differential.

微积分学中有关用导数与微分的观念讨论函数随独立变量改变的部分。

Occurrence and development of winter-time natural convection cooling effect in the fractured-rock embankment of Qinghai-Tibet highway were investigated using the governing equations based on air-flow function for natural convection in porous media with variable permeability.

通过变渗透率多孔介质流函数控制方程，分析了青藏公路碎石路堤冬季自然对流降温效应的发生和演化过程。结果表明：公路碎石路堤冬季自然对流降温效应从边坡区域最先开始形成，并随着冬季路面温度下降而逐渐向路堤中间区域发展。

It is difficult to control a single inverted pendulum system because of the characteristics of multi-variable, nonlinear and absolutely instability of the system. A controller based on adaptative neuro-fuzzy inference system is designed by using Matlab/Simulink software in the paper. For the sampling data the hybrid algorithm of back propagation algorithm and least squares algorithm is applied in the paper. Thus the parameters of membership function are adjusted and all of the fuzzy rules are generated automatically.

摘 要：针对单级倒立摆系统具有多变量、非线性、绝对不稳定的特点，本文应用Matlab/Simulink 设计了用于倒立摆系统的基于自适应神经模糊推理系统的ANFIS控制器，采用反向传播算法和最小二乘算法的混合算法对倒立摆控制样本数据进行学习，调整各变量的隶属度函数，自动产生模糊规则。

More precisely, all variableassignments in a function store the value in the local symbol table;whereas variable references first look in the local symbol table, thenin the global symbol table, and then in the table of built-in names.thus, global variables cannot be directly assigned a value within afunction (unless named in a global statement), althoughthey may be referenced.

所有的局部变量都存储在这个局部符号表中。引用参数时，会先从局部符号表中查找，然后是全局符号表，然后是内置命名表。因此，全局参数虽然可以被引用，但它们不能在函数中直接赋值（除非它们用global 语句命名）。

This method is more accurate than the conventional ventilatory volume approach and more comprehensive than EMG of diaphragm. It can be used to measure respiratory regulation function in normal and morbid state, and in the study of apneustic center chemical sensitivity and output variable under chemical and mechanical load.

该方法比通常使用的通气量法准确，比心膈肌电图法反映全面，可广泛应用于人在正常和疾病状况下呼吸调节功能的测量，也可用于化学性及机械性负荷条件下对呼吸中枢化学敏感性及输出变量变化的研究。

The main achievements of the project are as follows: 1 the hypothesis that a decrease in seed mass causes an increase in mean dispersal distance has been tested based on the experiments of weed dispersal by wind. The experimental results partly support the hypothesis. The results will help farmers to make an optimal strategy of weed control; 2 a statistic method for inferring probabilistic distribution function of a random variable has been developed, by which probabilistic distribution functions of weed species dispersal have been determined; 3 the reproduction structure of Bromus sterilis has been studied; 4 a more complex CA model with 25 neighborhood cells were built, which can simulate spread of a weed population. This work promotes developments in both theory and application of CA models; 5 the "mean law" in weed control has been proposed. Accordingly, the algorism of patch spring may be calibrated; 6 the "patch" and "true patch" have been mathematically defined so that herbicide can be efficiently applied; 7 simulation validates that initial configurations of weed will affect dispersal of its population and strategies of controlling it, or its distribution patterns affect its dispersal progresses.

主要完成的工作和取得的成果有：1）用实验证实了重量较轻的杂草种子并不一定飞得比较重的远，其结果有助于农民制订杂草的优化控制策略；2）发展了一种推断随机变量分布函数的统计方法并用它来获得了几个杂草种的扩散分布函数；3）对杂草Bromus sterilis的繁殖结构进行了研究；4）建立了一个具有25邻的较复杂的能模拟杂草扩散的CA模型，并在理论和应用方面促进了CA模型的发展；5）在杂草控制方面提出了&平均法则&，据此可对按块施药方法进行校正；6）精确地定义了&块&和&真块&以便在杂草控制中能更有效地使用除草剂；7）模拟证实杂草种群的初始配置影响其扩散和控制策略，或者格局影响过程。

To study the contents of amino acids of the samples of mulberry leaves from five varieties,the amino acids of mulberry leaves were derived with o-phthaldialdehyde and 9-fluorenylmetloyl chloroformate in pre-column,and DAD variable-wavelength as measure function,and separated by RP-HPLC.

以邻苯二甲醛与9-芴基羰酰氯作衍生剂，正缬氨酸为内标利用二极管阵列可变波长检测程序，采用柱前衍生反相高效液相色谱法测定5个桑叶品种的氨基酸含量。

Combining Newton two state model with step function,a u nified dynamic model between separation and collision process for the linkage me chanism with clearance connections,and with variable rotating speed of the cran k was developed in the paper.

将阶跃函数与牛顿二状态相结合，考虑曲柄非匀速运转，对含间隙平面连杆机构的副间分离与碰撞过程建立了动力学统一模型，利用该模型，引入粘弹性阻尼被动控制技术，通过算例分析了被动控制的效果。

The concept of equivalent rotationally rigidity is offered and the formula of rotationally rigidity is obtained.

主要做了如下几个方面的工作：对伸臂位于顶部的单层框架—筒体模型进行分析，提出了等效转动约束的概念和转动约束刚度的表达式。

Male cats normally do not need aftercare with the exception of the night after the anesthetic.

男猫通常不需要善后除了晚上的麻醉。