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Servomechanism is one of most important subsystem of rocket, and servo valve is the core part of servomechanism. Feedback stick is a precise and low stiffness part and its machining quality and stiffness accuracy determine the accuracy and reliability of servo valve working.

伺服机构是火箭最重要的分系统之一，而伺服阀是伺服机构的核心，反馈杆是伺服阀中的精密低刚度元件，它的加工质量和刚度精度直接影响伺服阀的工作精度和可靠性。

The electromagnetic spring with tooth structure is adopted in this paper to adjust the stiffness of isolator, which make the isolator work with different stiffness in different excited frequencies. So the isolation performance is improved as the resonance frequency is eliminated in a broad band.

本文采用齿形结构的电磁弹簧来改变隔振器的刚度，使隔振器在不同外扰频率下变刚度运行，从而能实现在较宽的频带范围内无共振峰，改善隔振性能。

First, it is discussed about the relation between the dynamic stiffness submatrix of the supports system with variable stiffness and damping and the optimum output-feedback matrix when the rotor-supports system is governed by the optimum control laws.

本章进一步研究转子—轴承系统变刚度阻尼支承振动主动控制问题，提出了在最优振动主动控制规律的有效频率范围以外，对转子—轴承系统进行次优振动主动控制的策略思想。

In order to study the variation of the stiffness, the variance ratio of the stiffness within the same horizontal or vertical plane is computed.

为了研究该机床静刚度的变化情况，计算同一水平面或竖直面内的静刚度变化率。

According to the distribution rule of interbedded drift angle in buildings and variational rule accompanying change of stiffness characteristic value, the paper puts forward the advice about how to differentiate normal structure story in structure design drawings and the influence factor which should be considered. The author also advances his opinion and suggestion about how to judge the rationality of stiffness arrangement of frame-column and shear wall in frame-shear structure.

就层间位移角在楼层中的分布情况和分布规律以及随刚度特征值变化的规律，提出了在结构施工图设计中如何划分结构标准层的建议和应考虑的影响因素：并就判断框—剪结构中框架柱与剪力墙刚度分配是否合理的具体方法提出了自己看法和建议。

In this paper, we propose a new semi-active variable stiffness damper which offers two stiffness to the controlled structure and can keep the structure in nonresonant condition.

设计出一种新型主动变刚度阻尼装置，该装置可向受控结构提供两种等效刚度，使受控结构能主动地避开地震动卓越频率而永远处于非共振的状态。

On the basis of investigation on oscillometric technique for non-invasive blood pressure measurements, and combined the technique with pulse-wave theory, this paper designs a blood pressure and artery stiffness measuring apparatus, which not only can measure blood pressure and heart-beat-rate accurately, but can calculate the measurers arterial stiffness index and vascular compliance.

本论文在研究分析无创血压测量方法示波法的基础上，结合脉搏波理论，设计出一种准确高效的血压与血管硬度测量仪，该仪器不仅能够准确测量出受试者的血压与心率，还能够计算出受试者的动脉弹性指数和臂动脉顺应性，为医生判断患者的动脉硬化程度提供一种有效的检测手段。

To realize high positioning precision and rapic response, this paper provides a variable parameter filter technique to filt positioning noise and high frequency noise meanwhile keeping rapid speed response, this technique has lower filter stiffness and damp paremeter in static state and bigger stiffness and damp paremeter in movement state using variable parameter technique, accordingly to solve the contradictions of positioning noise and positioning speed.

为实现系统高精度定位和快速响应，本文提出了采用宏定位变参数滤波技术滤除宏定位系统高频噪声，同时保持系统高响应速度。

Increased valve spring stiffness is to increase the stability of a simple common methods, such as the range of 20 ~ 100KPa spring spring into 60 ~ 180KPa's big spring stiffness, using this method is mainly brought locator valve, otherwise, the use of valve to reprovision on the locator.

增大弹簧刚度是提高阀稳定性的常见的简单方法，如将20～100KPa弹簧范围的弹簧改成60～180KPa的大刚度弹簧，采用此法主要是带了定位器的阀，否则，使用的阀要另配上定位器。

Up to now, ultrasound indentation technique has been widely used for assessing for the stiffness of tissue including residual limbs, diabetic feet, fibrotic neck induced by radiotherapy, spinae , and articular cartilage, which indicated that the technique can provide a quantitative measurement of tissue stiffness.

应用超声印压(Ultrasound indention，US indention)方法，已成功检测了糖尿病人足底、残肢、放射治疗前后颈部、脊柱、关节软骨等组织的硬度变化，表明用该法可定量检测因组织病变而引起力学特性改变。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐