无缺点的

However, ANSI flange design of the main shortcomings is that it can not guarantee no leakage.

然而，ANSI法兰的主要设计缺点是它不能保证无泄漏。

All of these aspects need to be improved.Considering the disadvantages of the two kinds of the deicers, great amounts of the science data are referred in the research experiment, by developing the main materials and the additives, a new kind of deicer: PAL is founded. Not only does PAL remain the advantages of the traditional deicer such as cheap materials and low freezing point:-43.8 C, but it has the character of CMA, low corrosion to steel and concrete.

针对上述除冰剂的缺点，本课题收集了国内外大量的相关科技文献，通过对主体物料和添加剂两方面的改善，寻找到一种新型除冰剂PAL，它既保留了传统除冰剂的优点，原料廉价易得，低冰点，可达-43.8℃；又兼有CMA的优点，对钢铁几乎无腐蚀，对混凝土无不良影响。

Element-free Galerkin Method is a effective method for solving partial differential equations with the help of shape functions coming from moving least squares approximation. It is well-suited to problems involving large deformation and crack propagation etc on which Finite Element Method can not be used easily. But EFGM is computationally expensive and it is hard to impose the essential boundary condition. Coupling the EFGM and FEM can fetch up the defect of EFGM and improve the efficiency highly.

无网格伽辽金法是基于移动最小二乘法的一种用来求解偏微分方程非常有效的方法，在处理诸如高度大变形、裂纹动态扩展等有限元法较难解决的问题时有其独特的优势，但是存在处理边界条件复杂，计算量大的不足，将无网格法同有限元耦合可以解决这些缺点，极大的提高计算效率。

In order to overcome the shortcoming of the passive power filter and parallel active power filter, a new parallel hybrid active power filter on base of the conventional parallel active power filter is proposed in this thesis.

本文针对无源滤波器和单独使用的有源滤波器的缺点，对传统的并联混合有源电力滤波器进行创新性改造，提出一种适用于大功率场合的谐波和无功综合治理的新型并联混合有源电力滤波器。

In addition to motor-driven way to turn more smoothly, without excessive momentum shortcomings, failures can be substantially reduced.

此外，以马达驱动方式开闭较平顺，无瞬间冲力过大的缺点，故障率可大幅降低。

These methods are expensive, but nondestructive for material.

它的优点是：对构件无损害，缺点是：成本较高。

However, common polyacrylate emulsion has some disadvantages such as poor water-resistance, poor film-forming in low temperature, becoming pastiness in high temperature, polluting environment with emulsifier and so on.

由于聚丙烯酸酯乳液具有耐热、耐光和耐老化等优点在涂料工业中得到了广泛的应用，但普通的聚丙烯酸酯乳液还存在耐水性差、低温下不易成膜、高温发粘以及含乳化剂的废液会对环境造成污染等缺点，因此，本文结合无皂乳液聚合和核壳乳液聚合技术，合成了聚丙烯酸丁酯/丙烯酸钠齐聚物，并以此为乳化剂，采用种子半连续法合成了以聚丙烯酸丁酯为核，聚甲基丙烯酸甲酯-苯乙烯为壳的无皂核壳聚丙烯酸酯乳液。

In this article we compare the benefits and drawbacks of secured and unsecured loans.

在这篇文章我们比较的优点和缺点有担保和无担保贷款。

Focusing on some disadvantages in standard BP algorithm, such as low convergence rate, easily falling into local minimum point and weak global search capability, Genetic algorithm is used to optimal the connection weight of BP Algorithm in this paper, and construct a GA-BP algorithm of evolutionary neural network, and the algorithm is applied to the control of BLDCM speed adjusting system.

针对标准BP算法存在全局搜索能力弱和易陷入局部极小点等缺点，本文将遗传算法与BP神经网络相结合，构造了一种新的进化神经网络GA-BP算法，并将该算法应用于无刷直流电机调速系统的控制，仿真结果表明，与传统的PI控制系统相比，该算法得出的电机控制曲线几乎无超调，与基于BP算法的速度控制系统相比较，具有收敛速度快、不易陷入局部极小的优点。

Furthermore, we discussed and pointed out the exact distinction of the meanings of reactive current, irregular current, reactive power and irregular power, then we give them proper mathematic definition with uniformed conception respectively, we established new power system, which is helpful for people to understand about nonsinusoidal system and its energy conversion much more deeply and substantialy, especially to gain new ideas on depressing and eliminating harmonic waves, and some new design method for more satisfying correcting power function, and different kinds of compensation and eliminating harmonic wave systems.

本文分析了传统的正弦系统有关定义及其与非正弦系统的异同，指出了前者存在的缺点，结合所给特例，讨论并确定了时域中非正弦系统有功电流和有功功率的严格定义，阐明了畸变功率在非正弦系统能量转换过程中所起的作用，在上述基础上，进而讨论并严格区分子无功电流、畸变电流、无功功率、畸变功率等的含义，并利用变分法给出了与上述含义相一致的各个概念的严格的数学定义；提出了新的功率体系。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了