查询词典 feedback control system

With regards to the learning motive of music, after excluding the pretest influence, it is the finding of the study that the students belonging to the experimentation group score higher in the areas of "Total score","Internal goal orientation","Work value","Controlled belief","Expectation to succeed" and "Test on anxiety" than the control group, amongst which "Work value" reaches significant difference on the measurement chart; of all the students scoring high on "Selective attention" during pretest, the experimentation group scores higher than the control group on posttest scores; regarding the students with lower pretest scores, the control group performs better than the experimentation group; of the students with higher pretest scores on "Discrete attention", the posttest scores of experimentation group are higher than those of the control group; regarding students with lower pretest scores, the control group performs better than the experimentation group; on "Sustained attention", the posttest scores of the experimentation group are higher than those of the control group; on the "Total score" of multidimensional attention measurement, the posttest scores of the experimentation group are higher than those of the control group.

研究结果发现，在音乐学习动机方面，经排除前测影响后，实验组学生在「总分」及「内在目标导向」、「工作价值」、「控制信念」、「期望成功」、「测试焦虑」等分量表上皆高於对照组，其中在「工作价值」分量表上达到显著性差异；在「选择性注意力」前测分数较高学生中，后测成绩为实验组显著优於对照组，对前测分数较低学生而言，则是对照组显著优於实验组；在「分离性注意力」前测分数较高学生中，后测成绩为实验组显著优於对照组，对前测分数较低学生而言，则是对照组显著优於实验组；在「持续性注意力」方面，后测成绩为实验组显著优於对照组；在多向度注意力量表「总分」方面，后测成绩为实验组显著优於对照组。

Building Products: fan coil digital LCD temperature controller, mechanical temperature control panel, electronic temperature control switch, three-speed switch, fan-coil electric two-way valve (three-way valve) and matching drives, proportional-integral regulation of electric valves, electric actuators, pressure side of the control-way valve, temperature and humidity sensors, electrical valve drive, pressure controllers, pressure sensors, pressure switches, gas flow switches, liquid flow switches, network control unit and related software, direct digital controller, communication modules, expansion modules, such as air-conditioning control products, inverter device control products; with Honeywell,×é, Siemens AG, Johnson, etc. from multiple vendors and agents set up a good relationship of cooperation; Security Equipment: Card, canteen consumption machine, access control systems, attendance punch card machines, parking, smart key counters, video intercom doorbell, hotel lock, the types of RF cards, shaped cards, business card printing produced; network equipment: routers, switches, group telephone, wire and cable materials such as sales; with CISCO, Huawei-3COM,, INTEL, D-LINK, Paul, NEC, SAMSUNG multiple vendors, such as set up a good relationship of cooperation, to become special agents; company by selling products ranging from consulting, purchasing, installation, after-sale tracking security services; company to "innovative, pragmatic, enterprising" as the forward power enterprises; always adhering to the "to perfection ---- Switch TO Perfection" design philosophy, the "customer first" as our business purpose.

楼宇设备产品：风机盘管液晶数显温控器、机械式温控面板、电子温控开关、三速开关、风机盘管电动二通阀及配套驱动器、比例积分调节电动阀、电动执行器、压差旁控制通阀、温湿度传感器、电动风阀驱动器、压力控制器、压差传感器、压差开关、气体流量开关、液体流量开关、网络控制单元及相关软件、直接数字控制器、通讯模块、扩展模块等空调控制产品、变频器设备控制产品；与霍尼韦尔、卓灵、西门子、江森等多家厂商及代理商建立了良好的合作关系；安防设备：一卡通、食堂消费机、门禁系统、打卡考勤机、停车场、智能钥匙柜、可视对讲门铃、酒店锁、各种射频卡、异型卡、证卡制作印刷业务；网络设备：路由器、交换机、集团电话、电线电缆等材料的销售；与CISCO、华为3COM、、INTEL、D-LINK、国威、NEC、SAMSUNG等多家厂商建立了良好的合作关系，成为特约代理商；公司对所销售产品提供从咨询、选购、安装、售后的全程跟踪保障服务；公司以&创新、求实、进取&作为企业的前进动力；始终秉承&至臻完美----Switch TO Perfection&的设计理念，把&用户至上&作为我们的经营宗旨。

According to the wire electrode on the trajectory of the different forms of control, WEDM can be divided into three types:* is a copy-control, cutting their lines in advance to create the shape of the workpiece and the same mode *, When the rough machining parts and die at the same time * Clamping in the machine tool table, in the process of cutting wire electrode tightly * close to the edge of model for mobile track, thus cutting out the model * with the same shape and precision to work; another One is the optical tracking control, the cutting in line before the first parts in accordance with drawings by a certain ratio of enlarge depicts an electro-optical tracking maps, drawings will be processed when the machine electro-optical tracking placed on the stage, followed on the stage The first photo has to follow the ink line graphics track movement, and then through the use of electrical, mechanical linkage to control the machine tool table work together with the relative electrode wire Xiang Sixing do sports in order to cut out the pattern and shape of the workpiece to the same; a re - Is a digital process control, advanced digital automatic control technology, machine-driven process in accordance with the geometry of the workpiece before the parameters of good pre-processing CNC automatic completion of the processing, production do not look like without drawing board also plans to enlarge, in front of more than two Control in the form of higher precision processing and broad scope of application, at home and abroad for more than 95% of WEDM have been using digital technology.

根据对电极丝运动轨迹的控制形式不同，电火花线切割机床又可分为三种：一种是*模仿形控制，其在进行线切割加工前，预先制造出与工件形状相同的*模，加工时把工件毛坯和*模同时装夹在机床工作台上，在切割过程中电极丝紧紧地贴着*模边缘作轨迹移动，从而切割出与*模形状和精度相同的工件来；另一种是光电跟踪控制，其在进行线切割加工前，先根据零件图样按一定放大比例描绘出一张光电跟踪图，加工时将图样置于机床的光电跟踪台上，跟踪台上的光电头始终追随墨线图形的轨迹运动，再借助于电气、机械的联动，控制机床工作台连同工件相对电极丝做相似形的运动，从而切割出与图样形状相同的工件来；再一种是数字程序控制，采用先进的数字化自动控制技术，驱动机床按照加工前根据工件几何形状参数预先编制好的数控加工程序自动完成加工，不需要制作模样板也无需绘制放大图，比前面两种控制形式具有更高的加工精度和广阔的应用范围，目前国内外95％以上的电火花线切割机床都已采用数控化。

Rare fine to the best remote control vehicle model, according to original vehicle 1 to 32 proportions fine, as slightly as a trademark, completely presses the original vehicle manufacture, the sparkling chrome-plating part, put in yours book shelf most appropriate only, the unique wristwatch infrared remote control operation, in the world the smallest remote control vehicle remote control, the ultra cruel wristwatch remote control, pressed on the wristwatch the button, could control this racing bicycle to the different direction advance, the backlash and the curve, but exchanged the ordinary vehicle mold chassis, turned an ordinary static vehicle mold, the replacement process extremely was also convenient, The entire screw organization, and has the tool oh, a vehicle actually has two uses ways, this it specialest place, the zinc base alloy +ABS engineering plastics material quality, the front of a train for the entire zinc base alloy metal manufacture, the front of a train and the oil pot might separate, the vehicle door may open, presses down on the wristwatch remote control the start key, the truck sends out immediately with the real vehicle same start thunders the sound, stopped when also had the braking sound, the ultra fine paint surface worked, the detail decided all perfect principles!

罕见的精细到极致的遥控车模型，按原车1比32比例精致，小到一个商标，全部按原车制作，闪闪发光的镀铬部件，放在您的书柜中最合适不过的了，独特的手表红外线遥控操纵，世界上最小的遥控车遥控器，超酷的手表遥控器，按动手表上的按钮，就能控制这台跑车向不同的方向前进、后退和转弯，而换上普通的车模底盘，就又变成了一部普通的静态车模了，更换的过程也极其方便，全螺丝机构，并配有工具哦，一部车却有两种使用方式，这就它最特别的地方了，锌合金+ABS工程塑料材质，车头为全锌合金金属制作，车头和油罐可分离，车门可开启，按下手表遥控器上的启动键，卡车立刻发出和真车一样的启动轰鸣声，停车时还有刹车声，超精致的漆面做工，细节决定一切的完美主义！

The concise control scheme and particular control algorithms employed are illustrated in detail, which mainly include pressure piecewise control for heat pump group and the low-point selection control for heat pump actuator, the pressure piecewise control for low-temperature dryer of Wet paper sheet, the pressure split control for the secondary steam recovery of oven and the cascade control for paper sheet moisture.

简要介绍纸幅干燥原理和热泵节能机理，设计一套基于S7-300 PLC的五叠网涂布白板纸机蒸汽冷凝水热力控制系统，阐述具体的控制方案和采用的控制算法，其中主要包括热泵组的压力分段控制和热泵开度的低端选择控制、湿端低温段烘缸组压力回路分段控制、热烘箱二次蒸汽回收压力回路的分程控制和成纸水分的串级控制。

In order to eliminate the influence caused by the nonminimum phase characteristic of a common Boost DC／DC converter, Viswanathan K has proposed a novel tristate Boost DC／DC converter. For enhancing performance, the statespace averaging model of this converter was first presented in this paper. Due to the nonlinear nature in this model, an inputoutput feedback linearization technique was adopted, and a complete controllable linear system was obtained. Then a statefeedback control strategy was designed based on this linear system. Simulation results show that the proposed control strategy can assure constant output voltage in a wide range, so as to realize the stability of the system during large fluctuation of power supply and load disturbance. Good dynamic performance can also be achieved.

针对 Viswanathan K为消除普通BOOST DC／DC变换器的非最小相位特性而提出的三态Boost DC／DC变换器，为进一步提高这种电路拓扑的性能，在建立了变换器状态空间平均模型的基础上，针对其多变量、非线性特点，采用输入输出线性化将其转化为一个完全可控的线性系统，在此基础上应用现有成熟的线性控制策略进行了控制系统的设计，并且采用MATLAB进行仿真验证，结果表明：这种非线性控制策略可以确保输出电压在大范围内恒定可调，且即使存在大范围扰动(输入电压和负载变化均较大)的情况下，系统也可以确保稳定性和良好的动态性能。

Currently some different video transmission scehmes have been proposed, such as source-based adaptive rate control, receiver-based simulcast and layered multicast, but these schemes basically follow the traditional network design principles and take end-to-end congestion control and error control mechanisms without the participation of network intermediate nodes, making a series of problems such as session management difficulty, congestion control blindness, feedback explosion, and the difficulty in achieving fairness among different users.

目前对于网络视频传输已出现了各种不同的解决方案，如基于源的自适应速率控制方案和基于接收端的联播、分层多播等视频传输机制，但这些方案基本上都遵循网络设计的传统原则，采取基于端到端的拥塞控制和差错控制机制，而没有网络节点的参与，从而导致会话管理困难、拥塞控制盲目、反馈爆炸等一系列问题，而且难以在用户之间达成公平。

Based on average current mode, PI control adopts the same double loop structure as analog control; Repetitive control adds a feedback innerly to change the model of control object so that it can meet the requirements of stability. This equals to a three-loop structure.

PI控制的设计基于电流平均模式，与模拟控制的双环结构相似；重复控制的设计，内部增加一个负反馈，以改变控制对象的模型，使之满足重复控制的稳定性要求，相当于一个三环控制结构。

A control scheme of micropositioner is proposed, two control methods are put forward: PID feedback control with BP neural network modeling in feedforward loopand fuzzy-PI sectionalized multimodal control

提出了微定位器的硬件控制方案，给出了两种控制方法：带有BP神经网络前馈环的PID控制方法和Fuzzv—PI多模态分段控制方法。

In the light of hysteresis, creep and nonlinearity of piezoelectric actuators, two control methods are presented. One is PID feedback control with BP neural network modeling in feedforward loop. Another is Fuzzy-PI sectionalized multimodal control. They are used for highspeed and precise position control of models driven by piezoelectric actuators.

针对压电陶瓷存在迟滞、蠕变和位移非线性等不足，提出了两种压电陶瓷微位移驱动器的位置闭环控制方法：带有BP神经网络前馈模型的PID控制方法和Fuzzy—PI多模态分段控制方法，实现了压电陶瓷微位移驱动器快速、高精度的位置控制。

Panorama Many people are dancing in a large sitting room.

在一个大客厅里，许多人在跳舞。

We fully understand how a microwave oven cooks food, it is first necessary to talk ...

我们充分理解一个微波炉煮的食物，这是首先要谈。。。