以...作基础

The purpose is to have one comparatively overall, thorough and well-operated study of the construction of Beibei Middle vocational shcool identity system.

本文将以中等职业学校在重庆北碚区市民心中的印象和职业学校内部员工对形象的认知两项调查为基础，对重庆市北碚区中等职业学校是否已有形象意识，作了一点初浅的实证性探讨，并力求为重庆市北碚区中等职业学校找到适合自己发展的个性化道路贡献一些基本的思路。

This paper is based on the design of the three-cylinder diesel engine.Introduced the design of the diesel engine,the importantment is the diesel of the valve gear.

摘要本文以四缸工程柴油机为基础，对柴油机的设计作了介绍，重点放在了配气机构设计上。

The article presents the developing condition of PWM and SVPWM first.Then the theory of SVPWM is discussed in detail.The SVPWM is based on the thought of magnetic chain tracking.It makes the ideal magnetic chain circle of three-phased sysmmetry electric motor supplied by three-phased sysmmetry sine wave voltage for basis,uses the practical magnetic chain vector formed by the different switch modes of three-phased inverter to track the basic magnetic chain circle.During the course of tracking,the inverter changes the switch modes properly to form the PWM waves.Then the modulation wave of SVPWM is analyzed in detail.The modulation wave of SVPWM is implicit,but the analogous modulation wave in A-B-C axis needs to be calculated in order to expose the internal relation of SVPWM and SPWM.That is to show the implicit modulation wave of SVPWM. SVPWM actually is a transformed SPWM ruly sampled by the modulation wave which is injected by the zero prefaces based on space vectors.

本文首先对脉宽调制技术的发展现状进行了综述，在此基础上分析了电压空间矢量脉宽调制技术的发展现状；接着对空间电压矢量脉宽调制技术的基本原理进行了详细的分析和推导，SVPWM是基于磁链追踪的思想，它以三相对称正弦波电压供电下三相对称电动机定子理想磁链圆为基准，由三相逆变器不同开关模式下所形成的实际磁链矢量来追踪基准磁链圆的，在追踪的过程中，逆变器的开关模式作适当的切换，从而形成PWM波；然后详细分析了电压空间矢量脉宽调制技术的调制波，虽然SVPWM法的调制波是隐含的，但是为了揭示SVPWM法与SPWM法的内在联系，需要求出SVPWM在A-B-C坐标系上的等效调制波，也就是将SVPWM的隐含调制波显化；SVPWM实质是一种基于空间矢量在三相正弦波中注入了零序分量的调制波进行规则采样的一种变形SPWM。

Based on the work principle of the speed reducer ,the paper studies the produced mechanism of the vibration signal,the fault forms and the different type of vibration caused by the faults.

文章以减速机工作原理为基础，研究了减速机振动信号产生的机理、减速机故障的形式，以及由于故障的不同引起的不同形式的振动，从减速机外部振动信号中获取故障特征信息，有效地实现了减速机的故障诊断。

In this paper, based on the review of many kinds of literatures and field survey in Dong Minority located in Congjiang County of Guizhou Province, the background of taboo formation was analyzed, some typical taboos related to rice-planting such as god and ghost worship, ancestor worship, and water worship, fish worship, frog worship, snake worship and so on, and their significance were discussed from the ecological angle, and the positive effects of traditional cultures including taboo in ecological conservation and regional sustainable development were illustrated.

在大量文献调研和实地考察的基础上，以黔东南侗族地区为例，较为系统地研究了一些禁忌产生的原因，重点分析了稻作文化中的一些禁忌及其生态学意义，揭示了少数民族地区包括禁忌在内的传统文化对生态保护和生物多样性保护的积极作用。

That is to say, a series of characteristic of the six-phase synchronous generator with Y-Y windings can be obtained from the research of the compound equivalent circuit.

建立了六相双Y同步机的新型数学模型，以该模型作理论基础，可以将六相双Y同步机转化为等值三相同步机、理想移相变压器和特定支路的复合等值电路系统。

Besides, this paper also aims to set out the model of magazine advertising service quality based on the needs of advertisers, and makes use of this conceptual model to evaluate the performances of CTW's revision. With deep understanding of advertisers' evaluation to CTW, it can be figured out efficient ways to raise their satisfaction levels.

本研究以不同学派的IMC模式为理论基础作修正，分析整合行销传播在《时报周刊》杂志改版的应用情形；另外，尝试建构广告主对综合性杂志广告服务品质的评估准则，并以此对《时报周刊》进行评鉴，藉由此一深入研究，以便有效提升广告主的满意度。

The paper starts from GATS, the promise and memo by China government on the problem of national treatment and market entrance of tourism service. The situation of the tourism legal environment at present is comprehensively analyzed.

本文以《服务贸易总协定》和中国就旅游服务市场准入、国民待遇等问题所作的承诺附录或谅解备忘录为起点，综合分析了当前我国旅游业的法制环境，在充分肯定建国以来我国旅游立法取得的成就的基础上，指出了当前我国旅游业法制环境中存在的问题：首先是，旅游法律体系不完备。

At the same time, from two critical points-levying scale and selling prices, taking Xian as an example, this paper provides some references for the government on land levying scale based on the use of mathematical simulation and cost of land.

在此基础上，运用数学模拟和成本法从征地规模和土地出让价格的决策临界点两个方面，以西安市为例作了实证研究，为政府在确定合理征地规模方面的决策提供了参考。

Plus, Hu Shi's literature in the vernacular Chinese theory is to take pragmatism philosophy as basis; But, that "literature of Zhou Zuo Ren's people" watches is to originate from humanitarianism thought.

还有，胡适的白话文学理论是以实用主义哲学为基础的；而周作人的&人的文学&观是来源于人道主义思想。

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。。。。