查询词典 disadvantages

For all the disadvantages, it has its compensating advantages.

有了它，就不用花钱去书店了。就不用花钱买软件了！！！

In this paper we firstly discuss the general concepts of compter security and cryptology, and then describe the mostly used modern encryption methods and technologies. We detail the advantages and disadvantages of symmetric algorithm, public-key algorithm and one-way hash function. At last we put forward a new block cipher - permutation code, and describe the secret hash digital signature and online electronic contracting with the trusted third party system.

本文首先讨论计算机安全和密码学的一般概念，然后介绍现代加密手段常用的方法和技术，详细讨论了对称加密方法、公开密钥加密方法和单向散列加密方法的优点和不足，进而提出了一种新型的分组加密算法—排列码加密算法，并在此基础上实现了保密散列数字签名算法和有可信第三方参与的网上电子签约。

In fact there are also disadvantages in Japanese family conciliate system.

注意日本家事调停事实上也存在的弊端。

Before you buy, keep in mind there are disadvantages to condominium ownership.

你买之前，记住有缺点公寓所有权。

The technologies related the system configurator are first introduced and studied. we review the advantages and disadvantages of the domestic and foreign same products.

本文首先介绍并研究了与系统配置器相关的技术，分析总结了同类产品的优缺点，然后介绍了我们最新开发的可视化系统配置器 VisualSCD。

A hybrid ANN-Lagrangian relaxation approach for generating unit commitment , and for the disadvantages of BP algorithm, a new conjugate gradient algorithm without line searches is used to speed up convergemce.

混合ANN和Lagrange松弛法用于解机组最优投入问题，并针对BP算法不足，利用一种不用精确搜索的共扼梯度训练算法，加速了网络的收敛。

The traditional electric power material management system based on C/S structure has some disadvantages,such as miscellaneous programming,connatural hidden trouble and low efficiency.

针对传统的普遍采用C/S结构的电力物资管理系统程序繁杂、存在着固有的安全隐患、效率低的缺点，本文提出了一种基于B/S结构的系统设计及实现方法。

On the contrary it has disadvantages, such as the complexity of computation and the conservatism of hypothesis tests.

随着计算机硬件技术的发展和计算方法的改善，计算量大的问题正在被逐步解决。

Firstly, this paper investigated roundly the basic theory of the ambient vibration method, analyzed systematically the main methods of ambient vibration identification, and discussed their advantages and disadvantages. Then we established the finite element model of structural dynamics and test model and analyzed their mutual relation, improved MUSIC method and correlation function method in the harmonic identification, and gave the subspace method and correlation function method based on continuous model, which is multi-harmonic retrieve technique. And then, this paper also puts forward least-squares method to estimate directly structural physical and modal parameters; this approach replaced the derivative operator in the continuous time model with an equivalent approximation, and estimated the physical parameters of structures by the least-squares method. And then, we discussed the approximation methods of derivative and their convergence. Finally, this paper researched the modal parameters of a frame structure by the simulation and test. The results demonstrated that subspace method, correlation function method and the least-squares method are effective and stable respectively.

全面地研究环境振动识别方法的基本理论，系统地分析环境振动识别方法的主要方法，讨论它们的优点和不足；建立结(来源：6666AB44C论文网www.abclunwen.com)构动力学的有限元模型和试验模型，分析有限元模型与试验模型之间的相互关系；改进谐波识别中的MUSIC识别方法和相关函数识别方法，给出大型结构模态识别的连续型的子空间分解识别方法和相关函数识别方法，这个方法是多元谐波识别方法；提出直接识别结构的物理参数和模态参数的最小二乘方法，这个方法利用导数的近似值代替导数值，并运用最小二乘方法识别结构的物理参数，讨论导数近似值的选择方法，分析算法的收敛性；通过仿真计算和模型实验，研究高层框架结构的模态参数识别，验证子空间分解识别方法、相关函数识别方法和最小二乘识别方法的有效性，算法的稳定性；从理论和试验两个方面分析和研究噪声对识别精度的影响，影响识别精度的因素，以及部分模态成分的模态参数不能够被识别的原因。

Through the analyzing, we can know that the general situation of the retailing industry's internationalization in china and the reason of retailing industry's internationalization; we analyze the condition of the overseas retailing industry's internationalization and their general situation and the effect of the investment in china for consulting; we summarize the advantages and disadvantages of Chinese and overseas chain retailing company in domestic competing situations, then analyze, point out the advanced point of the overseas retailing industry and the lacking point of the Chinese retailing company; based on the contradistinctive analyzing, combining the trend of present retailing industry's development, we could make the developing strategy for the Chinese retailing industry in the future.

通过分析了解我国零售业国际化的概况以及零售业国际化的动因；为了具有参照性，对国外零售业的国际化状况进行分析，分析他们的概况以及在中国投资的影响；总结本土竞争环境下中国与外国连锁零售企业所具有的优势与劣势，进行对比分析，指出外国零售企业的先进之处和中国零售企业的不足；在对比分析的基础上结合当今零售业发展的趋势提出未来中国零售企业的发展对策。

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。。。。