闭合系统

On some complex systems, It is desirable to have the closed loop control system adjust itself for various encountered conveyor conditions.

在一些复杂系统，它是中意安排闭合回路控制系统调整自己为各种各样的遇到的传动机情况。

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。

Analysis on the cumulative distribution of probability in capacity for IDMA-OFDM system is performed, and a close representation on system spectrum efficiency of IDMA-OFDM system is obtained, under the assumption of large system regime, when many receive antennas are used.

分析了IDMA—OFDM系统的容量的累积概率分布，在接收天线较多的情况下，以大系统机制假设为前提，推导出一个闭合的IDMA—OFDM系统频谱效率的表达式。

The main conclusions are as follows.(1) In Cartesian coordinates no catastrophe occurs in the magnetic flux rope system embedded in closed background fields, whereas in spherical coordinates, the system exhibits a catastrophic behavior.

主要结论如下：（1）在直角坐标下，闭合背景场中的磁绳系统不会发生災变；在球坐标下，日冕磁绳系统存在灾变现象。

Numerical simulations were done for a bistable latch valve of the system by FLUENT, and three groups of datum for different fluids were obtained with the same effective exit sectional area. Besides, a static mathematic model for the electromagnetic valve was established based on the obtained datum. Secondly, the motion of the valve spool was realized by UDF file in FLUENT. Three kinds of motions, uniform, acceleration and motion driven by the coupling effect of the liquid resistance and the electromagnetic force, were calculated and compared. The dynamic characteristic of the electromagnetic valve was obtained by analyzing the relationship of the mass flow rate of the inside flow field of the electromagnetic valve, the change of the drop pressure of the passageway of the valve, and motion time.

并针对系统中的某双稳态电磁阀，使用商用CFD软件FLUENT对其进行内部流场的数值模拟，通过使用不同流体介质，不改变阀门有效出口截面积的情况下，分析得到的三组数据，建立了该电磁阀的静态数学模型；通过编写UDF文件，实现对阀芯运动方程的控制，在阀门做由闭合到开启、开启到闭合运动时，控制阀芯分别做匀速运动、匀加速运动以及阀芯受到液体阻力与电磁力作用力的耦合力的运动，分析了三种工况下电磁阀内部流场质量流率和阀门出口入口压降的变化以及运动时间，从而得到该电磁阀的动态特性。

As a loose coupling relationship between the industry sectors, weak closure processes, unsmooth information circulating procedure, and egregious external competition at present, basing on complex ecosystem theory, the author treated Hainan mango industry as a complex ecosystem from the viewpoint of system and holism and put forward countermeasures to perfect industry management system, establish information warning mechanism, put more investment in industry science and technology, optimize variety structure and region arrangement, and strengthen recycling use of resources to promote Hainan mango industry's competitiveness, evolve and upgrade the industry, and ultimately realize its sustainable development from the viewpoint of system and holism.

为提升海南芒果产业的整体实力，促进产业的进化与升级，最终实现可持续发展，该文在复合生态系统理论基础上，从系统观和整体论角度，将海南芒果产业视作一个人工复合生态系统，综合分析海南芒果产业生态系统的现状，及其存在的产业环节横向耦合关系松散、纵向闭合过程薄弱、系统信息流程不畅、系统外部竞争过于激烈等问题，并提出健全产业经营管理体制、建立产业信息预警机制、加大产业科技投入力度、优化品种结构与区域布局、加强资源循环利用等相应对策。

Mobile positioning system or dynamic table so that the laser head is cutting material in the system-driven subcapital high speed, laser head from the light source and cutting heads, light source produces a very short wavelength focused laser beam, laser beam through cutting heads, vertically focused the material being cut on the surface, heating and melting, evaporation is cutting material, resulting in the closure of Lancing, slotted openings formation pads.

移动定位系统妪动工作台或激光头，使得被切割材料在系统驱动头下高速运动，激光头由光源部分和切割头组成，光源部分产生波长很短的聚焦激光束，激光束通过切割头，垂直聚焦在被切割的材料表面上，加热、融化、蒸发被切割材料，形成切缝，闭合的切缝形成焊盘开孔。

Closed Recirculating Aquaculture Systems is a system that can be managed safely by high-technology and has no pollution to environment.

&闭合循环水产养殖系统&是在封闭条件下被高度安全管理的高科技、环保型生产系统。

The transmitter updates the modulation mode, chooses the optimal transmission vector adaptively and retransmits data automatically by outdated feedback information.

推导了系统在时延反馈条件下的频谱效率和中断概率的闭合表达式，分析了时延反馈对于系统性能的影响。

This paper direct three primary colors solid state lasers which are as the light source,spectroscopes which are used to produce color beams of light,two galvanometers systems which are used to scan.

针对以三基色全固态激光器作激光光源，以分光镜作为混色方法，以双振镜系统作为激光光束扫描装置的激光扫描系统为对象，主要研究了激光光束扫描方法与显示分辨率的关系，提出了一种全新的扫描方法，闭合路径扫描法，并给出相应的硬件控制器设计。

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％。