流控制

The theoretical development of internal flow of turbomachinery is then summarized in terms of separation theory, vortex dynamics and flow pattern.

然后分别从分离流动理论、涡动力学和叶轮机械流型三个层次介绍叶轮机械内部流动理论的发展；从平面叶栅、环形叶栅、动态试验和试验技术等方面回顾叶轮机械试验研究进展；从控制方程、数值方法、网格生成等方面综述叶轮机械数值计算研究方法、研究内容及成果等，并概括改善叶轮机械气动性能的方法和现状。最后对叶轮机械内部流动研究进行展望。

The results show that the flow area and the high speed of the solenoid valve are the key factors in all of the factors, in order to improve the performance of the system, a high speed and great flow area solenoid valve must be used.

对所得到的优化结果分析说明，控制电磁阀的通流面积和响应速度是影响系统工作性能的最为关键的参数，要提高系统的工作性能必须要选用高速大流量电磁阀。

A variable valve gear and a method of adjusting valve opening rates capable of accurately controlling the rate of air and the intensity of swirl flow in cylinders.

本发明涉及一种可变气门操作装置和一种气门打开量调节方法，并且能够精确地控制缸内空气的量和旋涡流的强度。

This paper presents the concurrency control scheduling for the object-oriented distributed transaction processing in the workflow management system with massage queue and thread architecture by using lock of page unit.

使用消息队列和多线程，以页为封锁单元，给出一个基于工作流管理系统的面向对象分布事务的并发控制调度算法。

Company develops and manufactures chargers mainstream products are applicable to a variety of nickel-metal hydride, nickel cadmium rechargeable batteries, saturation in the charge automatically from the state-of-charge to trickle charge, but also has a discharge, detection, negative voltage control and overheating protection function, is the leading high-tech, high-end charger.

公司开发并生产的主流充电器系列产品是适用于各种镍氢、镍镉可充电池，在充电饱和状态下，自动从充电状态转为涓流充电，还具有放电、检测功能、负电压控制及过热保护等功能，是领导潮流的高科技、高档充电器。

PWM-controlled single-chip switching power supply lithium-ion battery chargers, effectively overcome the general charge, under-charging, low efficiency of the shortcomings, the charger for charging the overall management process, To be completed by pre-charge, fast charge and trickle charge function of the basic charge and battery safety monitoring functions and display functions, the realization of the intelligent charging, and to ensure that the charging effect .

PWM 控制的单片开关电源式锂电池充电器，有效地克服了一般充电、充电不足、效率低的缺点，该充电器对充电过程进行全面管理，可完成预充电、快速充电和涓流充电的基本充电功能和电池安全监测功能以及显示功能，实现了智能化充电，且保证了充电效果。

Ompare the experimental results with analytical results and sum up the factors which affect the flow front of underfill to find the method which can control the flow front, reduce the chance of short shot and air trap; therefore, enhance the reliable of underfill process of Flip-Chip.

AE(Computer-Aided-Engineering)模流分析模拟其流动情况；在完成实验与分析模拟之后，进行实验与模拟结果比较，归纳出影响底部充填波前形状的因素，并寻求控制底部充填流动波前形状的方法，降低短射与包风的发生，提高覆晶底部充填制程的可靠度。

The topologies of the FCL proposed for three-phase four-wire and three-phase three-wire power systems are investigated in detail. Parameter design and optimization are presented.

文中详细论述了用于三相系统的限流器的主电路拓扑结构、控制策略、参数设计与优化方法等。

The weak form of the governing equations of coupled thermo-hydro-mechanical problems in porous media within the element is established on the basis of the Hu-Washizu three-field variational principle.

基于胡海昌-Washizu 三变量广义变分原理给出的多孔介质中热-渗流-力学耦合问题控制方程的单元弱形式，导出了单元公式。

The system is mainly used for 140 horizontal continuous casting machine power plant, control of the working point tank movements, As the system configuration on a level of temperature, pressure relay (HED10A20), the solenoid valve, valve, safety valve, and so can the system oil temperature, pressure and other remote control and compact design of the structure, convenient operation and reliable performance, energy conservation is SLD-140 horizontal continuous casting machine hydraulic devices supporting the ideals of hydraulic equipment.

该系统主要用于140水平连铸机的动力装置，控制各工作点油缸动作，由于该系统配置有液位液温器、压力继电器（HED10A20）、电磁阀、溢流阀、安全阀等，因此可对系统的油液温度、系统压力等实现远程监控，其结构设计紧凑、操作方便、性能可靠、节约能源是SLD-140水平连铸机液力装置的理想配套液压设备。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。