查询词典 valid

As a result, the input symbols are no longer identically and independently distributed by definition and the distribution of PAPR derived for contiguous OFDM signal under these assumptions is not valid for the PAPR of NC-OFDM signal under these assumptions is not valid for the PAPR of NC-OFDM signals.

结果，输入符号不再是相同的，独立分布的定义和分配PAPR的推导毗连OFDM信号根据这些假设是无效的PAPR的数控OFDM信号根据这些假设是无效的PAPR的数控- OFDM信号。

Present a kind of paraconsistent modal logics PML by generalizing classical modal logics'truth value set from {0, 1} to [0, 1] , propose new logical consequence relationships by generalizing fuzzy implications in PML, introduce sound and complete Gentzen style inference systems in PML. 9. Global properties of valid formulas are the necessary conditions that must be satisfied by valid formulas.

8将经典模态逻辑公式的值域从{0，1}扩充到[0，1]，结合模糊逻辑推理关系的研究结果，建立了能处理不一致知识的模态逻辑，并给出其可靠而且完备的Gentzen型推理系统。

Valid ID certificates refer to Chinese ID cards for resident investors and valid passports of foreign countries for nonresident investors.

境内居民个人所持的有效身份凭证是指中国的居民身份证，非居民所持的有效身份证明文件是指有效的外国护照。

We call it the 'valid part' of the blending surface and will only consider the parametrization of this valid part.

我们重点讨论拼接曲面的"有效部分"的参数化问题。

Secondly, by establishing a discrete time Markov model with spatial reuse for a MANET, we analyze the performance of the network under the AODV routing protocol. The average route length and the probability to communicate within a limited hop distance are obtained. Several performance parameters of the route discovery and route maintain process are analytically studied, such as the probability generating function and the expectation of the flooding distabce. the probability that a route is discovered by a query packet with a "hop limit", the probability that a request packet finds a valid route, the average time needed to discover a valid route and the cost to successfully route a data packet to its destination. Furthermore, we present a concrete example based on the transmitter characteristic of directional antennas and obtain the corresponding results.

建立了移动自组网络空间可重用的离散时间马氏链模型，得到了AODV路由协议下网络任意两节点间的平均路由长度、在指定"跳限"要求下通信的概率；对随选型路由协议下路由发现和路由维护过程中若干网络性能参数进行了解析分析，如网络中任意两节点问的泛洪距离的概率母函数及其期望、限定泛洪步数时成功寻路的概率、发现一条有效路由的平均时间、成功路由的代价等；并基于定向天线的发射特征给出了一个具体实例，分析计算了相应的网络性能参数。

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。

Objective To investigate the effects of interleukin-1 β converting enzyme gene on the biologic characteristics of ovarian cancer cells.

目的 探讨白细胞介素-1 β转换酶的表达，对卵巢癌细胞生物学特性的影响。

Campylobacter: This illness is the most commonly identified cause of diarrheal illness in the world.

弯曲：这种病是最常见的原因查明腹泻病，在世界上。