切换

Based on the approximation expression of the oil film force of CSFD presented in chapter 6 for the short bearing, effectiveness of the active vibration control of CSFD on the rigid rotor、flexible rotors with one disk and two disks are studied both theoretically and experimentally.

在第六章推导出了CSFD在短轴承π油膜假设下油膜力的计算公式之后，分别从理论及试验两方面详细地分析了CSFD对刚性转子、单盘柔性转子、双盘柔性转子系统的振动进行分段控制的控制作用；讨论了不同的控制规律、切换滞后、切换次数以及转子角加速度等对控制效果的影响，以及在双稳态区切换时转子运动的方向性问题。

The connecting unit can receive electric signal, the internal memory can store data, the processing unit can choose switching between the first and second operation modes in accordance with the electric signal, and access of data according to the chosen operation mode, and the display can show the information of control and condition of the storing device.

一种可携带的存储装置，可切换于第一操作模式与第二操作模式，存储装置包括有：连接单元、处理单元、内存和显示器，连接单元可接收电信号，内存用以存取数据，处理单元依据电信号选择性地于该第一与第二操作模式间做切换，并依所切换的操作模式进行数据的存取，显示器可显示存储装置的控制及状态信息。

For the whole switched system, a suitable switched law is designed to ensure: 1 the state of the closed-loop system, at the time of the transition, resides in the stability region of the mode that the system is switched into; 2 the Lyapunov function for each mode is nonincreasing wherever the mode is reactivated, thereby guaranteeing the stability.

对整个切换系统，设计适当的切换律以保证： 1在切换时刻，闭环系统的状态处在切入系统的稳定区域内； 2切入模块的Lyapunov函数是非增的，从而可保证稳定性。

The chattering mode in the dynamic process of the unforced switched systems isinvestigated. The relations between the rotation directions of trajectory, the increase ordecrease the polar radius of trajectory, and the convergent chattering mode are revealed.

分析了二阶切换线性系统的收敛震颤现象与相轨迹的旋向以及相轨迹极半径增减趋势之间的关系，进而得到忽略切换延迟时二阶切换线性系统出现收敛震颤模态的充分条件。

Common multiple compound control is switched automatically by program based on predeterminate error value. Therefore, how to select suitable error value and disturbance during switching are unavoidable defects.

由于常规多模复合控制是按照事先设计的切换阀值由程序自动进行切换，所以它们存在阀值如何选取和切换扰动等问题。

An instantaneous optimal semi-active control method is put forward. Combined sliding mode control with lyapunov's stability theory, the control weights matrix, which can minimize structural instantaneous energy, is designed. Simulation and shaking table test is conducted to validated the method's effectiveness. To solve combination explosion of controlled structural state encountered in high-rise building control, the semi-active control strategy, which can drive structural state point to reach the sliding mode switching band, is designed by using sliding mode control theory, and genetic algorithm is used to find the optimal semi-active switching to drive the structural state point to sliding mode switching band at prestissimo speed.

提出了一种瞬时最优半主动结构控制方法，利用滑模变结构控制理论和Lyapunov稳定性理论设计使结构瞬时能量最小的半主动控制权矩阵，仿真实例和振动台试验验证了本文所提方法的有效性和实用性；为解决在高层建筑半主动控制中半主动控制器状态组合爆炸的问题，利用滑模变结构控制理论设计在Lapunov稳定意义下使结构在运动状态空间中任一相点于以最快速率到达滑模切换带的半主动控制策略，并用遗传算法找出了最快到达滑模切换带的半主动控制切换组合。

The present invention discloses a method and system of holding session continuity, the system includes: network, hand off source point faction entity, hand off destination point faction entity, hand off anchor point faction control panel entity and hand off anchor point faction user panel entity.

要约 本发明公开了一种保持会话连续性的方法和系统，该系统包括：所述网络、切换源端点功能实体、切换目的端点功能实体、切换锚点功能控制面实体和切换锚点功能用户面实体。

You can ask your team to hold position by pressing the Toggle Team Hold key. To have them rejoin you, simply press the Toggle Team Hold key again. To switch between different team members, press the Next Team Member and Previous Team Member keys, or press and hold the Operative Menu key.

你可以按下「切换小队等候」来要求你的小队在原地等候；只要再按一次「切换小队等候」就可以让他们重新加入你；若要切换到其他队员身上，可以按「下一个队员」与「上一个队员」，你也可以按住「干员选单」来选择要切换到的队员。

This thesis proposed the design and implementation of an ASIC for the motor control with DTC technology. Note that this ASIC is implemented by cell-based Design style with Verilog language.The basic principle of the Direct Torque Control is to select the switch sequence of the inverter. Those switches will control the magnetism and torque of the stator, to induce a fast response of the induction motor. Furthermore, the d-q axle's static coordinate, which is transferred from both the three-phase current and voltage, is used to compute the stator's magnetism and torque. By comparing with original values, those magnetism and torque will be calculated and set to new data. Then the switching table and the hysteresis controller are decided with the new data to generate a voltage vector and to control the stator magnetism and torque.

直接转矩控制的基本原理为经由侦测马达定子磁通与转子转速，来适当的选择变频器功率电晶体的切换状态，以获得快速且不易受外在环境影响的马达控制响应；首先，根据量测三相电流与利用变频器的切换状态取得马达的三相电压，将其转换至d-q轴静止座标，然后藉此估测马达的磁通量与转矩量，再分别与侦测的定子磁通量和转矩量比较后，得到定子磁通量与转矩量比较的结果，再利用DTC电压向量切换表(DTC Voltage Vector Switching table)，依定子磁通与转矩的比较值及马达所在的角度位置，来选择一个适当的电压向量，进而依切换顺序来激发功率电晶体，达到控制感应马达的目的。

Shandong journey from the journey from Canton Electronics are electronics factory in Jinan in Shandong to set up offices, is responsible for "PCER journey from" Series Products in Shandong Province and other channels of distribution and after-sales service, Canton journey from an electronics factory (line forming the Department of cable) is a professional manufacturer of VGA lines / HDMI Digital Line / DVI digital line / USB Line / Parallel Port Print Line / 1394 digital line / KVM and three lines / MP3 Line / MP4 Line / power cord / AV Audio Video Cable / PS2 mouse keyboard line / network and other computer peripherals jumper cable; 2 are specialized in the production line RVV jacket / RVVP shield / 75-3 75-5 SYV Coaxial / 3 +4 3 +6 five core RGB coaxial lines and other projects large-screen security monitor cable; are specializing in the production of three VGA divider / VGA switch / VGA video devices extended / KVM Switch / KVM Extender / PC to TV (VGA signal transduction AV signal) converter / DVI digital signal splitter / DVI Switch / HDMI Splitter / HDMI switches and other products.

山东征途者电子是广州征途者电子厂在山东济南成立的办事处，主要负责&PCER征途者&系列产品在山东省的渠道分销及售后服务等，广州征途者电子厂一部是专业生产VGA线/HDMI数字线/DVI数字线/USB线/并口打印线/1394数码线/KVM三并线/MP3线/MP4线/电源线/AV音视频线/PS2鼠标键盘线/网络跳线等电脑周边连接线；二部是专业生产RVV护套线/RVVP屏蔽线/75-3 75-5 SYV同轴线/3+4 3+6 五芯同轴RGB大屏幕线等工程安防监控线缆；三部是专业生产VGA分频器/VGA切换器/VGA影音延长器/KVM切换器/KVM延长器/PC转TV转换器/DVI数字信号分配器/DVI切换器/HDMI分配器/HDMI切换器等产品。

Fancy gold-plated dangling earrings with facetted White Opal crystals.

花式镀金悬垂耳环与facetted白欧泊水晶。

This essay chooses the study aim from biology teachers in middle school in Shi Jiazhuang which tells us that most of the middle school biology teachers in Shi Jiazhuang have the"burnout", lower successfulness, individualize.

本文选取石家庄市初中生物教师作为研究对象，运用问卷调查的方法对石家庄市初中生物教师职业倦怠的现状进行调查，调查结果发现，石家庄市初中生物教师这一群体普遍存在职业倦怠，情感枯竭程度偏高，成就感偏低，去个性化程度最为严重。