差等

With PET/montmorillonite as matrix resin,flame retardant PET/montmorillonite engineering plastics reinforced by glass fiber were prepared by the addition of glass fiber,flame retardant agent and toughener,and the prepared engineering plastics could be molded at low moulding temperature.

PET以优异的综合性能和低廉的价格在纤维、薄膜方面获得了广泛应用，但是由于PET结晶速率低、产品收缩率大、模塑加工温度高、抗冲击性能差等缺点，限制了它在工程塑料方面的应用。

But it is difficult to dye neutral color and the color of product is not stable, especially for spun-dyed viscose, because neutral color is trinal color.

但是，因为中性色多为三次色，所以在印染加工中存在拼染困难、成品色光稳定性差等缺点，这对粘胶纺液着色加工，会产生致命的影响。

However, the traditional methods which use handwork or traditional GMP file management system still have some problems such as the unclose relation between the operation flow and the GMP files or the poor abilities of system reconfiguration and extension.

然而，目前采用的一些基于手工方式或利用传统的GMP文档管理系统来管理GMP文档，还存在业务流程不能与文档的紧密相关、系统的重构性和可扩充性较差等问题。

But the active contour model has some disadvantages such as the high complexity of the algorithm and its poor convergence to the weak edges of images.

但是，活动轮廓模型本身也存在很多缺陷，如计算复杂度比较高、图像的弱边缘收敛性比较差等问题。

When GA are used in solving real engineering optimal problems, such disadvantages as premature convergence or weak ability of local search will occur.

但是在遗传算法的实际工程优化应用中，常常存在早熟收敛和收敛性能差等问题。

BP neural network based on adaptive UKF is introduced in this paper for the standard BP neural network has slow converges, local minimum value and weak generalization ability.

针对BP神经网络收敛速度慢、容易陷入局部极小值点和泛化能力差等问题，基于自适应Kalman滤波理论，提出一种自适应非线性滤波训练BP神经网络的方法。

Because vegetation sourced photosensitizers are unstable, low concentration in plant and insignificant effect, we put our emphasis on a kind of chemical photosensitizers - xanthene.

由于植物源光敏化合物不稳定、含量低、效果差等一系列固有的缺陷，本论文着重研究了一类化学合成的光敏化合物——呫吨类化合物的光敏生物活性、光降解及开发利用。

But as we know, institutionalization can not replace family according to the nature of life. To a great extent, institutionalization can not meet with the need of emotion. The children who grow up in the institutions are usually dissocial or isolated in personality. They disconnect from others and predispose to violence.

但是，儿童福利机构作为家庭的替代形式集中为儿童提供照料时，在很大程度上并不能满足儿童成长中的情感需求，长期生活在福利机构中的儿童往往会出现性格孤僻、心理封闭、缺乏自制力与上进心、社会适应能力差等方面的问题。

Sulige Gas Field has low porosity, low permeability, low abundance, strong heterogeneity, complicate geological condition and is not very good at effective sand body continuity and connectivity, and so on. It is observed that gas well productivity of this gas reservoir is low, formation energy supply not enough, single well drainable gas is finite.

苏里格气田具有低孔、低渗、低丰度，非均质性强和有效砂体连续性、连通性差等特征；从已有的试井动态资料可以看出，该类气藏气井产能较低，地层能量供给不足，单井可采气量有限。

by analyzing internal and exterior factors working on the validity of professional sports service production institution, the paper concludes that on the one hand, with ectogenic, compellent, defective structure low maneuverability and human degree in the chinese professional sports production institutions, which result in low validity of professional sports production institution in china; on the other hand, for the whole nation systems and common property right dominated by china government, china economy systems' transition, confucian culture that pays more attention to academic knowledge, whereas despise on physical force, which greatly influence the efficiency of professional sports service production institution.

摘 要：通过分析影响竞技体育生产制度有效性的内在因素和外部因素，得出：一方面，中国竞技体育生产制度由于其外生与强制性、制度结构欠缺、可执行性程度低、人性化程度差等原因导致其制度有效性低，另一方面，中国政府主导的&举国体制&和竞技体育的公共产权、中国经济体制转轨、&重文轻体&的儒家文化极大地影响竞技体育生产制度效率的发挥。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。