查询词典 detection

However, little is known about the effect of weak background noise on the detection of acoustical signals in animals.

平时被人们忽视的弱背景噪声是否影响动物的声信号的检测，其神经机制是什么，还未见相关的研究报道。

The method has been used to determine Phthalic esters in drinking water and seawater sample. 3. Single drop microextraction, followed by gas chromatography with flame ionization detection has been applied to determine Formaldehyde, Acetaldehyde and Acraldehyde in water based on 2,4-Dinitrophenylhydrazine derivatization. Extraction solvent, extraction time and stirrer speed were optimized. Optimal experimental conditions were as follows: 1.6μL toluene microdrop exposed for 30 min in a 3ml aqueous sample placed in 4ml vial and stirred at 600 rpm/min.

以2，4-二硝基苯肼衍生，单滴液相微萃取与气相色谱火焰光度检测器联用测定水样中的甲醛、乙醛、丙烯醛，考察了萃取溶剂、液滴大小、萃取时间、搅拌速度、盐效应等对该方法的影响，并对影响液相微萃取的各种因素进行了系统的阐述，确定了该体系的最佳实验条件，实现了甲醛、乙醛、丙烯醛的提取和富集。

Their discovery marks the first abundance determination of the actinides element thorium in a star beyond the Milky Way, and follows the detection of thorium in more than ten stars within the Milky Way.

他们发现，标志着首丰测定的锕系元素钍星以外的银河系，跟检测钍十余恒星的银河系。

A kind of automatic calculus method is used for the recognition and extraction of skeleton feature,in which some algorithms are used,such as the actinism amendment,fuzzy inference of feature,and edge detection.

运用感光度修正，特征的模糊推理和图像处理的边缘检测等手段，设计一种自动识别骨龄特征的骨龄计算方法。

Finally, 30 of actinomycosis of the initial screening and re-screening, to find the biological activity of strain, strain through 16SrDNA activity and biological characteristics of the determination of the detection, a preliminary to determine their taxonomic status.

最后通过对30株放线菌的初步筛选和再次筛选，找到有生物活性的菌株，通过对活性菌株的16SrDNA的测定和生物学特征的检测，初步确定其分类地位。

Upon detection of a failure in a second processing complex of the server cluster, the standby mode logical partition in the first processing complex is activated to an active mode.

一旦检测到服务器集群的第二处理复合器中的故障，就将第一处理复合器中的备用模式逻辑分区激活到活动模式。

The development process of urban traffic signal control systems is simply reviewed, and the actuals and evolvement of traffic systems such as SCOOT, SCATS, UTOPIA, RHODES, OPAC and PRODYN are introduced. The above systems′ characteristics and shortages are analyzed. This paper points out that the keys for improving the performances of urban traffic signal control system are high quality detection data of traffic volume and traffic models.The development of urban traff...

简单回顾城市交通信号控制系统的发展过程；重点介绍SCOOT、SCATS、UTOPIA、RHODES、OPAC和PRODYN系统的现状和进展，分析其特点和不足；通过分析指出：提高城市交通控制系统性能的关键是高质量的交通量检测数据和交通模型，显然，把先进的智能控制技术、信息融合和处理技术与交通管理技术结合起来，才是城市交通信号控制系统发展的方向。

On the basis of these studies, sensitive and rapid determination methods of AM and MA in urine by gas chromatography with electron-capture detection combined with various acyl derivatization were developed.

在此基础上，建立了人尿中苯丙胺和甲基苯丙胺的酰基衍生化的气相色谱－电子捕获检测分析方法。

An NMOS feedback device is added in the detection circuit, and the dynamic transmission structure is applied.

该电路在检测电路部分加了一个NMOS反馈器件，同时在检测电路的下一级使用了动态传输结构。

In addition,a theorem for the convergence of detection of target contrail by this algorithm is given and proved so as to afford a solid guarantee for practical applications of the algorithm proposed in this paper.

文中给出并证明应用本算法能以概率1检测到运动点目标的收敛性定理。

By the time of its fall, most of the prisoners were writers who had written against the corruptions of the government.

到它被攻陷的时候，里面多数的犯人是写了反对政府贪污文章的作家。

The most obvious variation to ovum morphological character was that the color was changed from light green to sepiaceous in embryonic development, and all the ovums were almost hatched after 96h.

在胚胎发育过程中卵的形态特征最明显的变化是颜色从淡绿到深褐色，卵在发育96h后卵基本全部孵化。