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Abstract: Ene reaction is one of the simple and versatile reactions in organic synthesis.
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文摘:烯反应是有机合成中简单而用途广泛的反应之一。 |
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Abstract: Erucic acid contents in seeds of ten populations (P1，P2，F1，RF1，F2，RF2，B1，RB1，B2 and RB2) from the cross between two genotypes of erucic acid (high and low) in Xingjiang wild rapeseed were studied.
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文摘:通过新疆野生油菜高、低芥酸杂交组合正反交F1、F2、回交一代及相应的杂交亲本种子中芥酸的测定，分析了新疆野生油菜芥酸的遗传。 |
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Abstract: Establishing database of work injuries and death accident statistics analysis system, can deal with a most of work injuries and death accident raw datum by computer, and obtain analysis consequence in the light of different demands, find out veg
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文摘:建立工伤死亡事故统计分析数据库，可利用计算机对大量的伤亡事故的原始数据进行处理，得出不同要求的统计分析结果，从中找出伤亡事故发生的一些规律，为今后的安全生产提出应该重视的问题，为采取预防措施提供依据。 |
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Abstract: Establishment of the macro dynamic mathematical models for coked zeolite catalyst coke burning regeneration was discussed from an engineering point of view.Based on the modified particle-pellet model,dynamic mathematical equations for porous and
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文摘:从反应工程学的角度讨论了结焦沸石催化剂烧焦再生反应宏观动力学数学模型的建立，根据已提出的修正的颗粒-粒子动态等温物理模型，分别推导出了多孔焦炭的燃烧再生阶段数学方程和无孔焦炭的燃烧再生阶段数学方程，为结焦沸石催化剂再生反应过程计算机模拟提供了理论依据。 |
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Abstract: Estrogen receptor(ER) and Androgen receptor(AR) assays were performed with fluorescent histochemical method in 89 cases of bladder carcinoma.77 cases were followed up for at leazt six years.The tumor recurrence occurred in 32(41.56%).
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文摘:采用荧光组织化学法测定了89例膀胱移行细胞癌雌雄激素受体的表达，获长期随访的77例中有32例复发，复发率为41.56%。 |
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Abstract: Events contributing to the establishment of statistics―the science of data―and its chemical branch are epitomized.As the new chemical branch named chemometrics or chemstatistics has been disputed in the circles of chemistry for a long time,reaso
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文摘:本文追溯了统计学发展、建立中的大事，陈述了它的定义及其化学分支发展、建立的梗概；鉴于化学界对该新兴化学分支学科的名称长期存在争议，提出了以化学统计学而不以化学计量学为该学科名称的理由，把化学统计学定义为一个研究有关数据的收集或产生、描述、分析、综合和解释，以获得新化学知识或信息的学科；阐明了许多公认属于统计学的方法，如显著性检验、方差分析、回归和相关，以及一些尚未认定属于统计学的方法，如模型建立、蒙特卡罗方法、傅立叶变换和人工神经网络，都含有统计学5个内涵中的一个或多个；探讨了化学统计学家成长的模式 |
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Abstract: Evolving information filtering method presented in this paper describes user's information needs from multi-aspects simultaneously,and improves system filtering performance through a process like natural selection.Inspired by object-oriented pro
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文摘:进化式信息过滤方法从多个角度描述用户的信息需求,通过类似自然选择的过程,达到系统整体过滤性能的优化.同时还从面向对象程序设计语言的设计思想中获得启发,引入了继承、类树的概念,增加了过滤系统的易用性.这种方法可以缩短训练时间，提高过滤质量,同时减小过滤结果与训练次序的相关性. |
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Abstract: Experiments show that the cement road surfaces in cities are actually conductive.
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文摘:实验测定，混凝土路面实际上是导电的。 |
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Abstract: Experiments were made on a ultrasonic machining tool with work-piece adhered to ultrasonic transducer head,to machine micro-holes on hard and brittle materials such as soda glass and Si,to study the effects of tool materials，work-piece materials
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文摘:通过以WEDG放电加工手段制作微细超声加工用工具，在采用工件加振方式的微细超声加工机上对碳酸玻璃、半导体硅等硬脆材料试件进行微孔加工的实验，来探讨在某一特定加工条件下工具材料、工件材料、工件的振幅、加工静载荷、磨料悬浮液浓度、工具长度及工件尺寸等重要因素对加工速度、工具损耗率的影响，为微细超声加工技术的实用化提供参考依据。 |
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Abstract: Expound the component, the principle and the working process ofthe material attenuation measure device, give the attenuation coefficient calculation method.
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文摘:阐述了材料衰减测试系统的组成、原理及工作过程，给出了衰减系数的计算方法。 |
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Abstract: Expounding detailed professional harm during shipbuilding and mending,putting forward the countermeasures to control these.
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文摘:详细论述了船舶建造过程中及修理过程中的职业危害，提出了控制这些危害的措施。 |
