参考系统

Based on the variation with the structural and geometric parameters for a real engineering, dynamic characteristics for a cable-supported lattice shell is studied with the block Lanczos method by means of the finite element model combined with beam elements, truss elements and cable elements.

选用梁元、杆元和索元的组合有限元模型，采用分块Lanczos法，针对一实际工程，通过改变结构参数、几何参数等诸多因素，较系统地研究了肋环型索承网壳结构的动力特性及抗震、抗风性能，对工程应用有一定参考价值。

A detailed introduction is given to technical standard of trans\|sectional jointless track and requirements over jointless switch , providing references for revision and supplement of relevant technical standard.

分析无缝线路名词术语及有关规定，系统介绍跨区间无缝线路技术标准、无缝道岔有关要求，便于工程技术人员借鉴，为尽快组织制定和修改补充所涉及技术标准提供参考。

Result obtained in the paper lays the theoretical foundation for the application ofdisturbance injection method to maximum power track in small scale wind powergenerating system, and has the value of guidance in practical application.

本文的工作为最大功率控制扰动法在小型风力发电系统中的应用提供了理论依据，具有重要参考价值。

The characteristics and application of two-wire and three-wire system of public address distributing system are ana- lyzed and compared in detail through some projects, which gives a reference to the readers in design.

通过工程实例，对公共广播配线系统中二线制及三线制两种配线方式的特点及应用进行详细分析和比较，供同行设计时参考。

In this paper, a tooth for milling tenon electrical control of the entire process, electrical components will be used to achieve the milling work tenon tooth path of automatic and manual control, selected relay - access control systems to accomplish this purpose, it has the advantage of Line intuitive, are most commonly used electrical appliances, the replacement of convenience, cheaper prices, through repeated experiments and demonstration confirmed by the use of electrical components can accurately on a milling machine tenon teeth effective control of the machine tools to improve the control of a certain value .

本文研究了专用榫齿铣电气控制的全部过程，将利用电气元件来实现对榫齿铣工作路径的自动与手动控制，选用了继电-接触系统来完成这一控制目的，它的优点是线路直观，大部分电器均为常用电器，更换方便，价格较便宜，通过反复的实验与论证结果证实所用电气元件能准确对机床榫齿铣进行有效控制，对机床控制的改进有一定的参考价值。

Analyze quantitatively chilled water with large temperature difference how to affect the performance and energy consumption of pump, chiller, fan-coil unit and surface air cooler and cooled water with large temperature difference how to affect pump, chiller and cooling tower.

对大温差系统的推广应用具有一定的参考价值。分析了外围护结构各部件如外墙、窗户的遮阳性能、玻璃性能、窗墙比、屋顶对空调负荷的影响，得出建筑总负荷与各围护结构的热工性能基本上成正相关。提出了要降低能耗，对围护结构应该采取的措施。

Thereafter,the response of magnetic bearing to a step disturbance force is simulated under PD and PID controller,which provides some references for design of the actual controller.

并在此基础上，对磁轴承在PD以及PID控制器下对阶跃扰动力的位移响应进行了仿真，分析了各种控制器参数下系统的响应变化情况，为实际控制器的设计提供了理论上的参考。

In DTW matching system, it is very difficulty to determine the cluster center of the speech reference patterns obtained by multi-training.

对于采用DTW动态规划模式匹配方法的语音识别系统，从多次训练所得的语音参考模式中求得其聚类中心一直是一个难题。

Space resolution is a key factor in bistatic ISAR system design.

空间分辨率是双基地ISAR系统设计中一个关键参考因素。

The results can be considered as basic references for the design and optimization of the solar-hydronic snow-melting system.

所得结论对太阳能—土壤蓄热融雪系统的设计与优化有重要的参考价值。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。