摘要：Based on the framework of classroom teaching learning process analysis, this study explores the relationship between language proficiency and the acquisition of teaching knowledge in the sample of three English repetitive lessons in senior high school by two English student teachers. After quantitative and qualitative analysis, it was found that the higher the level of language, the greater the improvement of teaching knowledge;the student with high language level has made rapid progress in teaching design, slow progress in teaching management and student learning, while the progress of the student with low language level is slow in all aspects. This study has important reference value for pre-service foreign language teacher education.

摘要：设计了一个基于Freescale 16位单片机的8通道的智能数字抢答器.该抢答器能实现8位选手一起进行抢答,主持人能发送抢答开始信号,并发送判断信号,最终还可以进行分数的统计,在数码管上显示分数最高选手的分数.

摘要：《保险学》课程教学中,学生从熟悉基础理论到运用理论解决实践问题中缺少一个环节进行转化。为此,围绕保单解读组织教学,能把知识掌握推进到能力培养和情怀树立。基本思路是以保单解读为突破点,教学内容上积极求变;依据五星教学理论进行教学设计;把翻转课堂作为五星教学中“融会贯通”环节的重要手段,由学生解读保单;采用线上资源、实践资源进行条款解读能力训练;课程思政融入保单解读;课程考核中把保单解读作为考核内容。学生提高了学习主动性,提升了实践能力,了解了民生疾苦并产生共情且能付诸行动,实现了课程目标,完成了课程立德树人根本任务,有较好的推广价值。

摘要：目的:探讨比较瑞格列奈与米格列奈治疗2型糖尿病的疗效和安全性。方法:计算机检索Pub Med、Medline、EMbase、Cochrane图书馆、万方、维普、CNKI、中国医院知识总库。按照Cochrane Handbook 5.1.0评价系统评价方法查找瑞格列奈和米格列奈治疗2型糖尿病的随机对照试验(RCT),进行数据提取和质量评价后,采用Rev Man 5.2软件进行Meta分析。结果:共纳入5个RCT的文献,390例患者。Meta分析结果显示:在降低患者糖化血红蛋白[MD=0.02,95%CI(–0.43,0.48),P=0.92]和空腹血糖[MD=0.33,95%CI(0.00,0.66),P=0.05]方面,瑞格列奈组和米格列奈组的差异无统计学意义;在降低餐后2小时血糖[MD=0.91,95%CI(0.42,1.39),P=0.000 3]方面,米格列奈组优于瑞格列奈组。两组在胃肠道反应发生率[OR=0.61,95%CI(0.15,2.48),P=0.49]方面的差异没有统计学意义,但瑞格列奈组低血糖反应[OR=5.71,95%CI(2.16,15.10),P=0.000 4]的发生风险高于米格列奈组。结论:米格列奈在降低餐后2小时血糖方面的效果优于瑞格列奈,同时其低血糖反应的发生率更低。由于受到纳入研究质量与样本数量的限制,此结论有待设计严谨、长期随访的大样本临床随机对照试验进一步给予验证。

摘要：针对信息化发展中在线试卷的组卷工作中存在的问题,诸如如何让考试的试题更好地检验学生的知识水平,怎样考察学生掌握和未掌握的知识等问题,探索提出了一种自适应的组卷方法,把学生个性化信息引入其中,采用期望的试卷难度、区分度作为约束条件,将从试题库选择的试题子集的难度和区分度值与期望的难度和区分度的差作为目标函数,从而提出一种个性化信息遗传组卷算法(Personalized Information Genetic Algorithm,PI-GA)。测验结果证明,在生成试卷的时候,PI-GA算法可以有效地为学生提供个性化试卷,对比几种常见的算法,执行时间最短,并且所组成的最终试卷中包含的学生未掌握试题数量具有灵活性。

摘要：Antibody-directed enzyme prodrug therapy（ADEPT） is a new strategy for the treatment of cancer that has arisen in recent twenty years, the main merits of which are that it can improve the selectivity of anticancer drugs and reduce the side effects in remote tissue. In the present study, two prodrugs-glycosylated aromatic nitrogen mustard derivatives were synthesized. Glucose and lactose were converted into glycosyl donors-trichloroacetimidate; the obtained glycosyl donors were glycosylated with p-nitrophenol （ glycosyl donors） to form β-glucosyl p-nitrobenzene and β-lactosyl p-nitrobenzene that were protected by acetyl in a stereoselective manner; the two products were reduced by zinc dust and then treated with ethylene oxide, afforded two glycosylated nitrogen mustard derivatives that were protected by acetyl; the last step was to deacetylate and then afforded the two target compounds that could be used as prodrugs of ADEPT for further Anti-tumor research.

摘要：为探究不同地域、品牌的鱼香调料制备的鱼香肉丝挥发性物质的差异,试验采用电子鼻、捕集阱顶空-气质联用仪(trap head space-gas chromatography-mass spectrometry,HS-Trap-GC-MS)结合维恩图、气味活度值(odor activity value,OAV)和正交偏最小二乘法判别分析(orthogonal partial least squares discriminant analysis,OPLS-DA)分析不同地域、品牌鱼香调料制备的鱼香肉丝挥发性物质的差异。电子鼻结合主成分分析显示,4个样品的整体气味轮廓存在明显差异。GC-MS分析表明,4个样品分别鉴定出48,46,69,55种挥发性物质,相对含量分别为85.01%、85.63%、95.30%和84.30%。二甲基二硫醚、二甲基三硫、正己醛、庚醛、正辛醛、正己醇、桉叶醇、二甲基四硫醚、乙酸异戊酯、异戊醇、异戊醛对样品的气味形成有重要贡献。E-2-庚烯醛、戊醇、乙酸丁酯、戊醛、反-2-辛烯醛、二甲基四硫醚、松油烯、(-)-莰烯是样品特征风味物质。配料差异可能是导致不同地域、品牌鱼香调料制备的鱼香肉丝挥发性物质差异的主要原因。

摘要：随着工业的发展,染料废水对人类和环境的危害愈加显著,其中偶氮类的亚甲基蓝这种染料废水不仅色度大,而且难以降解.因此设计一种高效且灵敏的吸附剂来去除亚甲基蓝对人类和环境的危害是亟须解决的问题.本研究利用基于色散力校正的密度泛函理论(DFT-D)的第一性原理方法探索了本征及掺杂磷烯吸附剂对亚甲基蓝的吸附机理,并详细考察了本征及掺杂Al,Ca,Ti和Fe金属原子后的磷烯对亚甲基蓝吸附的影响.研究结果表明亚甲基蓝初始构型会影响磷烯对其吸附,当亚甲基蓝平躺于磷烯表面时有较大的吸附,且金属原子掺杂显著地影响其对亚甲基蓝的吸附能力,掺杂金属原子均增大了磷烯对亚甲基蓝的吸附.其中吸附能力是Fe掺杂磷烯>Ca掺杂磷烯>Ti掺杂磷烯>Al掺杂磷烯.研究结论对于亚甲基蓝的处理带来了新的指导方向,有望为相关染料废水的检测和去除提供有意义的理论参考.

摘要：To experimentally determine the isothermal sections of Co-Mo-Zn ternary system at 600 and 450℃,the equilibrated alloy and diffusion couple methods were adopted by using scanning electron microscopy coupled with energy-dispersive spectrometry,X-ray diffractometry and electron probe *** results show that there are six three-phase regions on the Co-Mo-Zn isothermal section at 600℃and nine three-phase regions on the Co-Mo-Zn isothermal section at 450℃.No ternary compound is found in these two isothermal *** the maximum solubilities of Mo in the Co-Zn compounds(γ-Co5 Zn21,γ1-Co Zn7,γ2-Co Zn13 andβ1-Co Zn)and that of Zn inε-Co3 Mo are no more than 1.5 at.%.The maximum solubilities of Zn inμ-Co7 Mo6 are determined to be 2.1 at.%and 2.7 at.%at 600 and 450℃,*** addition,the maximum solubilities of Co in MoZn7 and MoZn22 are 0.5 at.%and 4.7 at.%at 450℃,respectively.

摘要：市场上的节能台灯普遍存在光效低、亮度不均匀、眩光较严重的缺点,以改善这些缺点作为出发点,设计了一款高均匀低眩光的LED护眼台灯.设计加入非球面反光杯灯罩来收集LED光源发出的大角度光线,提高了光能的利用率并改善了眩光.加入配光透镜消除接受平面存在的中心亮斑,解决了均匀照明问题.通过ProE三维设计软件进行实体建模,导入TracePro进行光线模拟和仿真分析,结果表明这一LED台灯配光设计可在工作距离为450mm、直径为700mm的接收面内实现低眩光高均匀照明,平均照度可达497.1lx,平均度达到0.9左右.这一高均匀低眩光LED护眼台灯的设计方案有着广阔的实际应用前景.