性能不足

The result of simulation based on real Internet traffics shows that PLS can greatly improve the performances of forwarding packets when touters are lacking of labels.

基于Internet实际流量的仿真实验结果表明PLS协议相对于传统的MPLS协议而言，在标记空间受限的情况下，可以很大程度上提高转发性能，缓解标记空间的不足。

Based on the parallel bar system,combining with the synergetic method,the catastrophe theory and also the acoustic emission test,two new activated statistical damage models for quasi-brittle solid are developed,which could simulate the whole damage and fracture process of material when exposed to quasi-static uniaxial tensile traction.

通过对连续损伤力学与细观统计损伤力学的基本理论进行比较，指出现有损伤力学模型的缺陷和不足，将混凝土材料细观损伤对宏观力学性能的影响重新概括为断裂损伤和屈服损伤两种模式。

This paper advances the reasonable way of using iframe to design web based on the analysis of the advantages and disadvantages in the process of the normal frame web design and application.

通过分析普通框架网页在制作和使用过程中的利弊，提出了合理且巧妙使用内联框架的解决方法，使得设计出来的网页既有普通框架网页的优势，又较好地克服了普通框架网页的不足，并且还使网站的性能和专业化程度都得到了较大的提高，在实际应用中具有较强的可操作性

By the use of Circling cluster and Envlopment theory and flat surface sit-mark transformation theory, the chain wheel tooth equation of roller chain at high speed to match conjugage engagement is deduced.Establishing chain speed equation of roller chain at high speed,based on the analysis of the speed curves between roller chain at high speed and common roller chain,good drive of roller chain at high speed is verificated theoretically.By a example that move distance from transverse vibration between roller chain at high speed and common roller chain is contrasted,the accuracy of those theories that the paper brings up and higher functions of roller chain at high speed is proved.Finally, Establishing conjugage engagement line equation of roller chain at high speed and analyzing the complete engagement zone, the chain wheel tooth curve equation is studied at a higher degree. At the same time,the lack's place of the research result is pointed out.

依据高速滚子链设计要求与H_y-V_0齿形链的研究，阐述了滚子链传动实现准共轭啮合理论可能性；利用圆族包络法结合平面坐标变换理论推导出了满足共轭啮合的高速滚子链的链轮齿廓曲线；建立起高速滚子链链速方程，通过对高速滚子链与普通滚子链链速曲线的对比分析，从理论上验证了高速滚子链具有良好的传动性能；最后，建立起高速滚子链共轭啮合线方程，对其整个啮合区间进行了分析，进一步研究了链轮齿廓曲线方程，确定了主要参数的设计方法的问题，并同时指出了不足之处。

The invention is a method for designing and preparing binary reinforced damping magnesium alloy having medium rigidity, medium strength, high-medium damping and medium raw material cost, the prepared alloy is beneficial for balancing required elements in practical application, including optimized rigid, wide frequency band, wide strain amplitude, wide temperature zone, strength, enough high-temperature-resistance, creep resistance, toughness, price, anticorrosion treatment and heat processing, and is beneficial for solving the problems in industry, such as lacking of variety of damping magnesium base alloy, selecting and using of rare-earth resource or drawback of substitution.

设计和制备中等刚度、中等强度、上中等阻尼性能和中等原料成本的二元增强阻尼镁基合金的方法，得到的该合金有利于平衡优化刚度、宽频段、宽的应变振幅、宽温度区间、强度、足够耐高温、抗蠕变、韧性、价格、利于防腐处理和利于热加工等实际应用中需求的要素，利于解决工业上可供选择的阻尼镁基合金品种不多以及稀土资源选择利用或替代利用性不足的问题。

It analyses the performance specialties and the shortcomings of the existing slow-running starters and tells that a totally new double-contact electromagnetic switch with current-limiting resistance can be cooperated with these starters to get the suitable slow-running starters.

为探讨解决强制啮合式起动机常见的&铣齿&故障，提出必须采用二级啮合的可慢转起动机，才能从根本上解决问题，分析了现有各种可慢转起动机的性能特点及不足之处，介绍了一种全新的带限流电阻的双触点电磁开关与现有起动机配合成为可慢转的起动机。

On the basis of analyzing system structure, control theory, the influence on the parameter of PID, and system characteristic and the shortage of PID correcting control, the paper points out the parameter self-adjustable fuzzy PID control technology.

在分析了PID校正控制系统结构、控制原理、PID各参数对系统性能的影响以及PID校正控制存在的不足的基础上，提出了参数自整定模糊PID控制技术。

In order to solve the poor load capacity of oil film bearings during the start-up process of tandem cold rolling mills, based on the hydrostatic bearing theory, a load bearing capacity model for oil film was established. The influences of screw-down tilting, hydraulic pump power and restrictor's hydraulic resistance on the hydrostatic pressure bearing-spindle system were calculated.

针对某CVC带钢冷连轧机启动阶段支持辊油膜轴承静压承载能力不足的问题，应用流体润滑理论，建立了轴承倾斜工作下静压承载能力的全润滑系计算模型，分析了轧机压下倾斜、油泵功率和节流器液阻对轴承静压承载性能的影响。

The air operated quota kinking sausage filler uses the control valve switch air cylinder to adjust the processed products respective weight, the button achieves through the operation kneading board on controls each procedure movement the goal, this equipment is the sausage equipment which performs in the quota sausage filler's foundation to develop, this machine both could the quota sausage and be able the automatic kinking, to change the insufficiency which the past quota sausage kinking could not one time complete, this machine stable property, the operational safety was reliable, raised the production efficiency in the original foundation.

气动定量扭结灌肠机，采用控制阀开关气缸来调整加工产品所属重量，通过操作面板上按钮达到控制各个程序动作的目的。该设备是在定量灌肠机的基础上加以研制的灌肠设备，该机既能定量灌肠又能自动扭结，改变了过去定量灌肠扭结不能一次完成的不足，该机性能稳定，操作安全可靠，在原有的基础上提高了生产效率。

The results showed that the performance of the drill pipe joints was in line with standard and the main reason was that the making up torque was inadequate.Drill pipe joints in underground unrestrained tightening-up caused the drill pipe joints to bear the excessive load more than their anti-torque yield strength.

结果表明：钻杆接头的各项性能指标均符合标准规定，失效的主要原因是上扣扭矩不足，钻杆接头在井下无节制旋紧，致使钻杆在井下的自上扣扭矩超过了钻杆接头的实际抗扭屈服强度。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。