查询词典 closed-circuit

By generating the closed form "triangular" Groebner Bases, the closed form symbolic solution has been obtained. An example of synthesis of planar rigid body guidance is given to demonstrate the strategy and efficiency of the method.

在生成该系统的封闭形式的"三角化"的Groebner基的基础上，求出了问题的封闭形式的符号解，以平面铰链四杆机构的刚体导引综合问题为例，说明该方法的思路及有效性。

Firstly, velocity expression of translational parallel manipulator was presented based on the screw theory. Secondly, the actuated screw, the actively unactuated screws and idle screws of each limb were determined according to the reciprocal screw theory. Then, all basic kinematic chains were enumerated by means of the number of limb connectivity and the limbs containing closed-loops were obtained by replacing the passive prismatic joints in the basic kinematic chains with planar closed-loop structures.

首先基于螺旋理论给出移动并联机构的速度表达式，然后根据互易螺旋理论确定出分支的主动螺旋、可动非主动螺旋和惰性螺旋，再依照分支连接度的不同列举出所有可行的基本分支运动链，并通过运动副替换得到分支中含有闭回路结构的运动链，最后利用所综合出的支链按照主动副的配置要求将动平台和静平台连接起来即可实现预期的机构。

In order to make the new recursive method convergence fast, the RLS-like forgetting factor is introduced to construct the new data Hankel matrices. In the framework of subspace methods, the gradient type subspace tracking method is used to implement the update of the state subspace, which results the unbiased estimate. Different from traditional offline method, the system matrices are recursively computed using RLS method. The convergence analysis of the proposed method is given and finally, the efficiency of this method is illustrated with a simulation example.A new closed-loop identification method is proposed to implement consistency estimation of closed-loop subspace identification.

引入RLS-like遗忘因子机制构造新的数据矩阵，更好地跟踪系统时变信息，提高递推算法的收敛速度；在子空间辨识框架内，采用梯度型子空间跟踪算法实现对状态子空间的更新，避免了子空间近似带来的估计有偏性；与传统的离线算法不同，在得到系统状态子空间后，基于递推最小二乘方法提出新的算法，实现对系统矩阵的递推估计；并给出递推子空间辨识算法的收敛性分析；最后通过仿真实例验证算法的有效性。

Closed loop wavefront residual error of adaptive optical system consists of the uncompensated turbulence error and closed loop noise.

采用比较自适应光学系统闭环校正前后时间功率谱的方法，对自适应光学系统的波前校正残余误差进行了分析。

The main contents are as follows.1 For the state control problem in closed quantum systems, according to the distance between states, the error between states and the average value of an imaginary mechanical quantity, three Lyapunov functions are chosen, respectively. The corresponding control law designs and the convergence analyses are studied. Especially, for the Lyapunov function based on the distance between states, a class of control laws that can solve the problem that an initial state is orthogonal to a goal state is designed. The convergence of the system is analyzed via LaSalle\'s principle and one method to find the largest invariant set of the closed loop system is proposed by linearizing the unitary evolution operator at the corresponding instants.

在这一背景下，本论文在指出研究量子系统控制的必要性、回顾量子系统控制理论和方法的研究现状的基础上，从控制理论的角度研究Lyapunov理论和最优控制理论对于封闭量子系统的应用以及开放系统中的若干问题，主要内容包含以下几个方面。1针对封闭量子系统中的状态控制问题，根据状态间的距离、状态间的偏差、一个虚拟力学量的均值，分别选择三种Lyapunov函数进行相应的控制律设计和收敛性分析。

Objective To compare the variability of adverse effects between BD closed tightly type detaining venepuncture and ordinary scalp venepuncture,and investigate the clinical effects applying BD closed tightly type detaining venepuncture in plasmapheresis.

目的 比较血浆置换术中采用BD密闭式静脉留置针技术与常规静脉穿刺出现不良反应的差异性，探讨BD密闭式静脉留置针技术在血浆置换术中应用的临床效果。

IT was winter-time; the air was cold, the wind was sharp, but within the closed doors it was warm and comfortable, and within the closed door lay the flower; it lay in the bulb under the snow-covered earth.

这正是冬天。天气是寒冷的，风是锐利的；但是屋子里却是舒适和温暖的。花儿藏在屋子里：它藏在地里和雪下的球根里。

T was winter-time; the air was cold, the wind was sharp, but within the closed doors it was warm and comfortable, and within the closed door lay the flower; it lay in the bulb under the snow-covered earth.

这正是冬天。天气是寒冷的，风是锐利的；但是屋子里却是舒适和温暖的。花儿藏在屋子里：它藏在地里和雪下的球根里。

Methods autohemic blood from femoral artery of dogs was taken and injected to one side pleural cavity with the same volume of normal saline and air to establish a model of hemopneurothorax on dogs .then 24 the dogs were divided into experimental group and control group at random with 12 dogs in each group. to observe and analyze the time of chest tube insertion,the intensity of resistance to pulling and drainage effect between the thoracentesis technique of invented minute invasion closed-chest drainage and traditional closed-chest drainage.

利用家犬自体股动脉穿刺采血注入一侧胸腔、同时注入等量盐水及空气的方法建立家犬血气胸模型，并将其随机分成实验组（n=12）和对照组（n=12），观察分析自制微创胸腔闭式引流装置与传统胸腔闭式引流装置的置管时间、抗拉强度、引流效果等。

The device comprises retaining means for keeping the lid (2, 3) in place in a sealing manner during treatment, and the retaining means comprise a bounding frame (10) that is circumferentially closed, with two interconnected end pieces (11, 12) situated at a distance from each other, which end pieces in a closed position can be slid over the pressure vessel (1) and thereby retain the end faces of the pressure vessel (1) in the axial direction.

所述装置包括用于在处理期间以密封方式将盖子(2、3)保持在适当的位置中的保持装置，并且所述保持装置包括沿圆周方向密封的围绕框架(10)，具有两个布置在相隔一定距离的位置处的互连端部件(11、12)，其中所述端部件在关闭位置中可滑到压力容器(1)上，从而沿轴向方向保持压力容器(1)的端面。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。