查询词典 closed system

Bilinear system model of DC-DC converters is built, combined with the control objective and extending the system, closed-loop nonlinear control system model of DC-DC converters is found.

首先建立了DC-DC变换器双线性系统数学模型，结合控制目的进行适当变形，得到DC-DC变换器的闭环非线性控制系统模型。

The design system chiefly includes two aspects: the automatic fire-fighting system and the closed circuit television system.

该设计系统主要包括两个方面：自动消防报警系统和电视监控系统。

This article in studies on the SCOOT and SCATS system's merits and demerits, according to our urban road network system's characteristics, has designed one system based on the closed ring circuit auto-adapted region transportation coordination control.

研究SCOOT系统和SCATS系统性能优缺点，根据我国城市道路网系统的结构特点，设计了一种基于闭合环路的自适应区域控制系统。

The console system includes power supply and drive circuit system, closed-loop control and communication system.

设计包括供电与驱动电路系统、闭环控制系统与通信系统。

They also use a range grating feedback system with piezoelectric horse stepping closed-loop system composed of anode control system.

其中还利用了光栅测距反馈系统与压电马的步进系统组成闭环阳极控制系统。

Application: Community antenna, video frequency, closed circuit television supervisory system, conduction system and unidirectional control system or the high-frequency machine connecting or internal wiring.

公共天线、视频射频、闭路电视监控系统、传导系统及单向控制系统或是高频率机器之接线或内部配线等。

The study of lattice-valued propositional logic system based on lattice implication algebra.On the bases of previous study, by using the concepts and methods of T algebras we established the lattice-valued propositional logic system LP , whose truth values domain is a lattice implication algebra, and discussed systematically the semantical and syntactical properties of LP , proved the soundness theorem 、consistency theorem、deduction theorem and the decidability of validity of the system when the truth values lattice is finite. We also discussed the relationship between the α-theorem of some premise, say A, and the closed sets that contain A.

本文在前人研究工作的基础上，利用T代数的概念与方法，建立了真值取于格蕴涵代数的格值命题逻辑系统LP，对它的语义及语法性质进行了较系统的研究，得到了它的可靠性定理、协调性定理及演绎定理等，证明了值格有限时系统"有效性"的可判定性并讨论了某一前提A下的α定理与包含A的闭集之间的关系。

It connects different factories or enterprises by the way of transmitting material flow or energy flow, to form industrial symbiosis networks by sharing the resource and mutual exchange by-products. Under this pattern,"by-product" of one producing process may be the raw material of another process. In order to explore material closed circular, energy conservation system and minimum discharge of the waste, it set up the circular pathway by imitating the natural circular system as"producer—consumer-- decomposer"in the industrial system.

它通过物质流或能量流传递等方式把不同工厂或企业连接起来，形成共享资源和互换副产品的产业共生组合，使一家工厂的废弃物或副产品成为另一家工厂的原料或能源，模拟自然循环系统，在产业系统中建立"生产者—消费者—分解者"的循环途径，寻求物质闭路循环、能量多级利用和废物产生最小化。

The topic in view of the existing technique level, the main factors, which influence the measurement precision of the large scale test system, are analyzed in this paper, and the solutions improving the precision are put forward.1 using the multi-channel independent AC to transfer DC module, the power supply of the digit part and the simulation part is discerption, reducing the crosstalk between the digital signal and the simulated signal;2The feedback self-checking module is constructed by singlechip compositive 16 high accuracy A/D , established a closed-loop control system through this module and improved system's overall precision effectively.

本课题针对现有的技术水平，分析了影响大型检测系统测量精度的主要因素，提出了提高精度的具体方案和办法：1采用了多路独立交流转直流模块，数字部分与模拟部分分开供电，减小了数字信号与模拟信号之间的串扰。2利用单片机集成的16位高精度A/D构建了反馈自检模块，通过该模块建立了一个闭环控制系统，有效地改善了系统的整体精度。

At present, the class teaching in some higher vocational colleges are in the self-closed or half self-closed state. Some researchers pay attention to the quality of teachers, but ignore the contrast system of quality evaluation based on social demands; Pay close attention to learners participant-learning, but the participation confined teachers and students in class; Pay close attention to activity norm of class teaching, but the norm is far from the social standard.

目前，有些职院的课堂教学处在一种自闭与半自闭的状态，有些研究者关注教学主体的素质，都忽视把社会需求作为素质评价参照系统；关注学习主体的参与型学习，这种参与却局限于课堂内的师生；关注课堂教学的活动规范，这种规范都与社会现实准则相去甚远。

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％。