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Abstract: After the third national conference on education, quality education has become the strongest note in the educational field of China.
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文摘:第三次全国教育工作会议以后，素质教育已经成为中国教育界的最强音。 |
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Abstract: Aim To synthesize a new prodrug, resveratrol trinicotinate.Methods In presence of lithium and a catalytic amount of naphthalene, the reaction of p-methoxybenzyl trimethylsilyl ether and 3,5-dimethoxylbenzaldehyde gave resveratrol after a series
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文摘:目的合成一种前药白藜芦醇烟酸酯.方法在金属锂片和催化量的萘的存在下,3,5-二甲氧基苯甲醛与对甲氧基苯甲醇的三甲基硅醚反应经过一系列转变得到白藜芦醇,白藜芦醇与烟酰氯反应得到白藜芦醇烟酸酯.结果设计并合成了白藜芦醇烟酸酯.结论提供了一种合成白藜芦醇及白藜芦醇烟酸酯的方法,采用KHSO4脱水可选择性的得到反式产物. |
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Abstract: Aim To synthesize isonucleoside-incorporated oligonucleotides and investigate their binding abilities with complementary sequences.Methods The synthesis was performed on DNA synthesizer, and the binding behavior was investigated by thermal denat
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文摘:目的合成异核苷掺入寡核苷酸并考察它们与互补序列的结合能力.方法采用DNA固相合成仪合成寡核苷酸,通过热变性实验考察双链的稳定性.结果合成了四条单异核苷掺入的寡核苷酸,热变性实验结果发现异核苷的引入降低了双链的稳定性,当异核苷处于寡核苷酸链的中央时,这种影响更为明显.异核苷6′-OH处于游离和烯丙基保护状态时的结果没有显著差异.结论寡核苷酸中的异核苷使链发生扭曲,从而导致双链稳定性降低. |
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Abstract: Aim at the photocurable sterelithography in which micro-components are made according to point-to-point exposure, the paper describes that this method takes long prototyping time，and it is one of main factors to restrict extension and applicatio
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文摘:采用离散点曝光方式来制作微型构造物的光固化快速成型法，其成型时间长，这一问题是制约微型光固化快速成型技术迅速推广应用的主要因素之一。 |
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Abstract: Aim study the characteristic of the hemolysin of Edwardsiella tarda.
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文摘:目的研究迟缓爱德华菌溶血素的特征。 |
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Abstract: Aim we wanted to approach whether etiological basis of the epidemic eosimephilic meningitis were angiostrongylu cantonensis in WenZhou.
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文摘:目的研究温州流行性嗜酸粒细胞增多性脑膜炎病原是否为广州管圆线虫。 |
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Abstract: Aimed at teaching of the NC technique,it develops the system that can be used to program,link,debug and maintain.This system is capable of setting failure in machine tool,and simulating.
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文摘:从数控技术应用人才培训的实际出发，专门针对数控机床故障诊断和维修的培训需要，研制了数控机床编程操作、连接、调试、维修的培训设备，在人为设置数控机床的故障方面进行了一些尝试，以达到能够方便、多次地设置与排除故障。 |
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Abstract: Aimed to realize the problem of quenched rail qualification forcast through quantitative analysis of quenched rail surface hardness by eddy current, and combined the eddy current theory with the computer image processing and signal analysis, the
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文摘:针对涡流无损检测淬火钢轨踏面硬度的定量分析来实现淬火钢轨质量保证预报问题，将电涡流理论与现代计算机图象处理和信号分析相结合，完成硬度测试模型建立。 |
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Abstract: Aiming at the variety of modals of nonlinear systems,we proposed a general parameter estimation method based on Genetic Algorithms(GA),which can be used in most kinds of nonlinear system modal.This method was applied to simulating parameter esti
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文摘:针对非线性系统模型的多样性，提出适用于多种非线性模型的基于遗传算法的参数估计方法，并以多种非线性模型为例作了仿真研究.结果表明，遗传算法是非线性系统模型参数估计的有效工具. |
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Abstract: Aimming at the defects of the brick masonry norm,through test on masonry wall models,the monolithic spacial effect for longitudinal and lateral walls of brick masonry buildings is studied and suggestions of calculated formulas for seismic resist
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文摘:针对砌体规范中墙体抗震验算中的不足之处，通过模型砖墙试验，研究了带翼缘墙在水平荷载作用下的恢复力特性曲线、砖墙破坏特征以及纵墙的影响等，并提出了在墙体抗震验算中应当考虑纵横墙共同作用的建议. |
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Abstract: Al2O3 moisture sensor is a new type water sensor, which can measure minim water.
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文摘:氧化铝湿度传感器是一种新型的测量微量水分的传感器，在物料干燥和环境湿度监测中都具有重要的应用。 |
