查询词典 null class

John Barrett Environment Report 2001/2 STOA programme http.//www.reprogress.com , null,null

杨开忠%杨咏%陈洁生态足迹分析理论与方法地球科学进展， 2000，6

Suretyship contract would be null and void not only because of being null and void of the principal contract but also because of its own.

保证合同既可能因主合同无效而无效，亦可因自身的原因而无效。

TYPE I ERROR is to reject the null hypothesis when it is true; TYPE II ERROR is to accept the null hypothesis when it is false.

比如最近在统计学课本上看到这么一段话：统计中有两类误差，分别称为一类误差和二类误差。

Consoli A%Musumeci S%Oriti G Active voltage balancement of series connected IGBTs null , 1995,null

陈志英%阮新波零电压开关PWM复合式全桥三电平变换器 10.3321/j.issn：0258-8013.2004.05.005 中国电机工程学报， 2004，05

Thirdly, the maximum-likelihood CFO estimation algorithms based on null-subcarrier are investigated, and it is shown that the maximum-likelihood CFO estimation algorithm based on equispaced null-subcarriers is equivalent to the CFO estimation algorithm utilizing the correlation of repeated training sequences.

进一步分析了在频率选择性衰落信道下，空载波和信道零点的数目与位置对基于空子载波的载波频偏估计算法可辨识性的影响。

Thirdly, the maximum-likelihood CFO estimation algorithms based on null-subcarrier are investigated, and it is shown that the maximum-likelihood CFO estimation algorithm based on equispaced null-subcarriers is equivalent to the CFO estimation algorithm utilizing the correlation of repeated training sequences.

提出了两种基于时域相关峰值检测的同步估计改进算法：1）采用一个OFDM符号做为训练序列，在接收端进行差分相关以解决时间度量函数中出现的平台效应。

JITENDRA KIKANL%OSWALDO A%PEDROSA JR Perturbation analysis of stress-sensitive reservoirs.[SPE 20053] null , 1991,null

廖新维%王小强%高旺来塔里木深层气藏渗透率应力敏感性研究 10.3321/j.issn：1000-0976.2004.06.028 天然气工业， 2004，06

WANG Shang-yi Calculation of longshore sediment transport rate null , 1995,null

窦国仁 潮汐水流中的悬沙运动及冲淤计算水利学报， 1963，4

In morpheme-based morphology, a null morpheme is a morpheme that is realized by a phonologically null affix (an empty string of phonological segments).

译文（不译，汉改高手是不懂的：在以词素为基础的字形学中，一个空白词素是由音韵学的空白词諁。

With a comprehensive study on the development of ellipsometer both at home and abroad as well as an analysis of the problems undermining HST-1 ellipsometer such as low effeciency in measuring, poor precision and ISA, this paper applies the master-sercice framework with USB interface into the designing of a precise reflectional null ellipsometer according to the principles by which the null ellipsometer works.

摘要本文综述了椭偏仪的国内外发展状况，分析了原来HST-1型椭偏仪存在的问题，如测量速度慢、精度不高和ISA接口等，根据消光式椭偏测量原理，采用了USB接口的主从机系统框架，设计了一台高精度反射式消光法椭圆偏振测厚仪样机，并对该仪器进行了大量的测试，测试数据表明该仪器测量精确度高且速度快。

Objective:To compare the response control and attention of Schizophrenic patients with that of the healthy controls by Integrated Visual and Auditorycontinuous performance test. To quantitate the impairment of cognitive function in patients, and to explore the relationship between cognitive function and the severity of the disorder.

目的：探讨精神分裂症病人在IVA持续操作测试中的反应控制能力、注意力等，并与健康人进行比较，从而量化精神分裂症病人的认知功能损害，并进一步探讨其认知功能与疾病严重程度的关系。

Main effective factors including subcooling degree, mechanical vibration, gas hydrate reformation, environment temperature, noncondensing gas and surfactant are analyzed.

指出过冷度、机械振动、重复生成水合物、环境温度、不凝性气体、添加剂是影响气体水合物生成的主要因素，还对R152a水合物的放冷进行了实验研究。