Analysis of the statistical characteristics of the randomly varying stress in structure

The maximum likelihood function of varying stress accelerated life is a nonlinear multi-dimension complex object function with five evaluated parameters, whose parameter estimation is easy to get into local optimization with grads descending algorithm while has low searching efficiency with global optimal algorithm.

变应力加速寿命试验的极大似然函数是高维非线性复杂目标函数，其待估参数多，采用梯度下降优化方法进行参数估计容易陷入局部极值，而采用全局优化方法又存在寻优效率低的问题。

One method solving parameter estimation of varying stress accelerated life test

一类解决变应力加速寿命试验参数估计的方法

Time-varying element method and its application

时变元法及其应用

A theoretical analysis of the varying pitch screw in mathematics, physics and shaping principle was presented.

对变螺距螺纹的成形原理进行了分析。

A Study of Screw Machining for Varying Pitch

变螺距螺杆加工的研究

An Improved Design of Machining for Varying Pitch

加工变螺距螺杆的一种改进设计

Design of Electric Control System of Varying Pitch Propeller on-board

舰船液压变距桨控制系统的改进设计

The mechanism analysis for uniform motion of chain with varying pitch

变节距链的匀速机理分析

Machining Varying Pitch Screw with Universal Machine Tool

变螺距螺杆的通用机床加工

The Reforming of Machine Tool Based on Machining for Varying Pitch Screw

基于变螺距螺纹加工的普通机床改造

Multi-Objective and Varying Parameter Optimization of Machining Parameters Based on NC Simulation Data

基于仿真数据的数控铣削加工多目标变参数优化

Time Varying Parameter Choice Model and Analysis of Time Varying Responses of Monetary Policy

时变参数选择模型与货币政策的时变反应分析

Interference and the damping methods for a slowly varying parameter measuring system

缓变测量系统的干扰及抑制方法

A analytic method for circuits with linear and time-varying parameter

线性时变参量电路分析法

A Study of a Varying Parameter Object Control Scheme Based on Compensator

基于补偿器的某变参数对象控制方案研究

Grey Time Varying Parameter Model and Its Application to Climatic Prediction

灰色时变参数模型及其对气候预报的应用

Time varying parameter estimation is very important to the control of dynamic system.

时变参数的估计问题，对于动态系统的控制是十分重要的。

You select a spot on the screen to set a rendezvous and watch as a car-shaped icon inches toward it.

在屏幕上选定上车地点后，就可以等着看车型图标一点点向这个点靠近。

If you have a few survivors in the dinghy with you, you need to set up a watch system. So that you can get some sleep. Someone else can watch for the rest of you.

如果在救生筏上还有其他逃生者，你需要建立一个观察体系，这样你们可以轮流睡觉，其他人可以帮助监护你们。

Set the new fashion in women's clothing.

创立妇女时装新风尚。