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The dissertation includes the work as follows: Firstly, we present a random graph model with spatial reuse for a dense MANET which using directional antennas. The analytic formula of several important performance parameters for the MANET are obtained under the DSR routing protocol, such as the average flooding distance, the probability generating function of the flooding distance, the probability of a flooding route to be symmetrically valid, the average time to find a symmetrically valid route and the cost to successfully route a data packet to its destination. We compare the two models with spatial reuse and without spatial reuse by evaluating these parameters. It is shown that the spatial reuse model is much more effcctive in terms of the performance of the dense network with directional antenna, because the bigger is the degree of spatial reuse, the smaller is the average flooding distance.

在定向天线技术的支持下，建立了移动自组网络空间可重用的贝努利随机图模型，获得了DSR路由协议下平均泛洪距离的解析公式和泛洪距离的概率母函数：给出了有效对称路由概率、发现有效路由平均时间、成功路由代价等关键性能参数的解析分析；在网络性能参数定量分析的基础上，对空间可重用和无重用的网络进行了比较分析，结果显示空间重用度增大，则平均泛洪距离、路由发现时延、网络代价减少。

Methods: The study population was physicians of accredited regional general hospitals in central Taiwan. The amount of samples for all levels hospitals depended on proportional sampling. Totally, 920 copies of questionnaires were issued. Among them, the valid questionnaires were 506 copies and valid response rate was 55%. Data collection was by means of structured questionnaires.

研究对象为中部地区医院评鉴等级为地区级以上综合医院之医师，依比率抽样方式决定各层级医院之样本数，共发出920份问卷，有效问卷共计 506份，有效问卷回收率为 55%，藉由结构式问卷收集资料。

The research targets of the study were the grade-six students of public elementary schools in Taipei County, and the survey through questionnaires was done using stratified proportional sampling, with 1,190 valid questionnaires and valid return rate of 92% from all the questionnaires collected.

研究对象为九十五学年度台北县公立国小六年级学童，采分层比例抽样进行调查，回收之有效问卷计1190份。

There are centain arguments which are intuitively valid,but which cannot be shown to be valid by the methords of sentential logic.

某些论证，任凭知觉似乎是有效的，但却不能通过句子逻辑的方法来证实起有效性。

Valid [5vAlid] However logical and valid the argument may be, they only skim the surface of the issue.

使用的 不管这些争论里得多么有逻辑性和正确，他们只看到了问题的表面。

And debugged is the quality guarantee valid period. The final quality guarantee valid period will take priority of the earlier one which reaches expiry date first. Part A will take all the cost of repair and transport arising from flow sensor's quality caused by theirs own reasons.

甲方保证出售给乙方的锥形流量传感器经过严格的出厂检验，产品质量可靠；货到交货地验收合格后18个月或安装调试后12个月为质保有效期，两个时间以先到者为准；若因甲方原因导致质量上的问题，甲方负责返修的一切费用。

Installed and debugged is the quality guarantee valid period. The final quality guarantee valid period will take priority of the earlier one which reaches expiry date first. Part A will take all the cost of repair and transport arising from flow sensor's quality caused by theirs own reasons.

甲方保证出售给乙方的锥形流量传感器经过严格的出厂检验，产品质量可靠；货到交货地验收合格后18个月或安装调试后12个月为质保有效期，两个时间以先到者为准；若因甲方原因导致质量上的问题，甲方负责返修的一切费用。

Data in must be valid tDS prior to the end of the write and remain valid for tDH afterward.

数据必须是有效的TDS之前的写，并保持有效的保卫领土总部后结束。

Want valid stop a student to play truant phenomenon, the government, school, family want to adopt valid measure, together grasp total tube, formation cooperate, is high school student of health growth, for society harmony make should have of contribute.

要有效制止学生逃学现象，政府、学校、家庭要采取有效措施，齐抓共管，形成合力，为中学生的健康成长，为社会和谐作出应有的贡献。

Once a valid write operation has been accomplished, the Empty Flag will go HIGH after tREF and a valid read can begin.

一旦一个有效的写操作已经完成，空旗将变高后tREF和一个有效的阅读就可以开始。

If you were not , and OS X just booted normally, have no fear.

如果你没有，和OS X刚刚启动通常，没有恐惧。

I only want to preserve our all .

我只想保存好我们的一切