性能不足

Furthermore,mature research and applications of plant fiber reinforced composite materials are summarized.

介绍了天然植物纤维的性能和天然植物纤维增强复合材料的特殊机理、不足及改性方法；总结了天然植物纤维增强复合材料比较成熟的研究和具体应用，指出天然植物纤维在经过改性以后增强各种复合材料是切实有效且可行的，并且有着非常广泛的发展前景。

By use of the Fischer-Tropsch reaction in a C-H-O system, we discussed the relationships between inorganic CO〓 and some physical chemistry conditions, such as Oxygen flee degree , temperature, pressure, other objects consistency and catalyzer. a when T=200K～2000K, if f〓＞0, the reaction of generating CO〓 will be dominant, CH〓 hardily exists; b when T＞1000K, CH〓 is not propitious to exist, carbon in system almost exists in form of CO〓; c the more pressure, the more CO〓 is propitious to exist; d the more consistency of CO, O〓 and H〓O, the more CO〓 is propitious to exist, the more consistency of H〓, the more CH〓 is propitious to exist.

依据C-H-O体系费托反应的简化模型，讨论了氧逸度、温度、压强、其它物质浓度、催化剂等物理化学条件对无机成因CO〓生成的影响，从理论上讨论了在地质环境中，无机成因CO〓存在的物理化学条件：1在T＝200K～2000K的温度范围内，体系中一旦氧逸度＞0，生成CO〓的反应将占绝对优势，CH〓几乎不可能存在；2T＞1000K时，不利于CH〓形成，使体系中的碳主要以CO〓的形式存在；3体系压强越大，越有利于CO〓的形成；4反应物CO、O〓、H〓O的浓度越高，越有利与CO〓的存在，H〓的浓度高有利于CH〓的形成。5地质成藏作用可以经历很长的地质年代，这足以补偿矿物岩石中的Ni、Mo、Fe、Co、Ru等催化性能的降低及其它动力学条件的不足，使得费托反应可能发生，从而生成无机成因的CO〓和烃类。

Based on the comparison of proposed basic topologies, Hypercube, as a popular used topology in networks, has a lot of advantages such as simple routing algorithm, small diameter and average number of internode distance, high fault-tolerance and so on. On the other hand, the network nodal degree which is logarithmically proportional to the number of network nodes limits the Hypercube network population most. So a class of hierarchical topologies are proposed to remedy this weakness of Hypercube and keep most of the advantages of Hypercube, such as CCC , HHC and deCube and so on.

基于对所提出的基本互连网络的性能比较，超立方体网络作为一个得到普遍研究的网络拓扑结构具有很多的优点，比如网络的非常简单的寻路算法，很小的直径和网络平均节点距离，高容错能力等等，但非常遗憾的是超立方体的缺点是超立方体的节点度随着网络规模的增加而成对数关系增加，从而限制了此网络的应用规模，大大地掩盖了它的诸多优点，所以人们提出了一类分层网络结构来弥补超立方体的不足同时最大限度地利用其优点，包括CCC，HHC以及deCube等。

In order to improve the dynamic characteristics of above motor drive, a nonlinear PI type speed controller based on hyperbolic tangent function was presented, and applied in the indirect vector control of an induction motor.

过去30年中，模糊控制技术在非线性系统的建模和控制领域中获得了深入研究和广泛应用[1]，研究发现，它比传统线性PI控制技术在感应电动机矢量控制系统中有更优越的动态控制性能，但也存在要求较多的实际经验、实现代价较高和高频抖振等不足之处[2]。

The research result shows that the main causes of accidents are related to driving performances, such as over-loading, significant speed variation among various types of vehicles, driving inattentively and following too closely.

研究结果表明，事故的发生与车辆的实际操纵性能有关，超载、不同车型之间运行车速的显著差异、行车注意力不集中及纵向间距不足等是造成货车交通事故的主要原因。

But it at each stage of development, are insufficient to improve it or add new performance.

但它每个阶段的发展，都是对它的不足而进行改进或增加新的性能。

But, there are some insurmountability problems in processes of thermoplastics application, for example, they are sensitive to temperature elevation caused by friction heat; their strength, deformation and creep are all affected by temperature.

但是，在实际使用过程中，UHMWPE等热塑性工程塑料的摩擦学性能还存在一些难以克服的不足，最具代表性的问题是对摩擦温升很敏感，其材料强度，变形与蠕变性能都受到温度的影响。

Introduce the ideological root causes and background knowledge in detailed, give the iterative formula and the iteration step.

针对微粒群算法在求解函数优化问题时出现的一系列问题，本文提出了雁群算法，详细介绍了雁群算法的提出的思想根源和背景知识，给出了算法的迭代公式和迭代步骤，并结合具体实例与微粒群算法相比较，对于某些优化问题，其优化性能比微粒群算法有较大的提高，在一定程度上弥补了微粒群算法的不足。

First, compound binder is established to use to lower the leavings in base-bleeding device and increase combustion temperature. Then, the contents of oxidant and fuel are obtained.

通过对某型号底排弹药剂的性能分析，针对其在燃烧温度、燃烧产气量、固体残渣滞留量等方面存在的不足，对药剂配方进行改进研究。

According to the characteristics of the scatter matrix classification measure, the selection criterion of local neighborhood parameter is introduced to acquire the sensitive fault features.

通过实例应用，表明该方法有效地克服了主分量分析和非线性核主分量分析方法的不足，提取的融合特征敏感性更好，从而提高了故障模式的分类性能，实现了轴承的早期故障诊断。

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。