检索结果-南通市图书馆

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

电力企业网上工作票传输系统的研究与实现

微计算机信息 2006年第7S期22卷 296-297,288页

作者：张国立于美菊华北电力大学应用数学系教授071003 内蒙古大学计算机学院 010023

本文对ASP技术及工作票的流程进行了较深入的研究。在Windows98、2000、XT等环境下,以PWS为服务器开发平台,采用HTML语言及脚本语言(VBScrip和JavaScript),开发出了“电力企业网上工作票传输系统”。该系统有界面登陆的密码验证及注册... 详细信息

本文对ASP技术及工作票的流程进行了较深入的研究。在Windows98、2000、XT等环境下,以PWS为服务器开发平台,采用HTML语言及脚本语言(VBScrip和JavaScript),开发出了“电力企业网上工作票传输系统”。该系统有界面登陆的密码验证及注册、申请工作票、审批工作票和浏览工作票四大模块。实现了申请、审批和浏览等整个工作流程的网上操作,并将数据传入主服务器,由主机进行存储及处理。

关键词：电力企业工作票 Internet ASP 数据库

观察值驱动的广义INAR(1)过程的经验似然推断

在线全文

学校读者我要写书评

暂无评论

统计与决策 2020年第14期36卷 10-14页

作者：许晶于梅菊李淑文东北师范大学数学与统计学院长春130000 通化师范学院数学学院吉林通化134000

整值时间序列分析作为时间序列分析的重要组成部分,被广泛地应用于社会生活的各个领域。文章提出了一类观察值驱动的广义INAR(l)过程,推导了该模型的概率统计性质,并利用经验似然的方法研究了该模型的参数估计问题,给出了模型参数的极... 详细信息

整值时间序列分析作为时间序列分析的重要组成部分,被广泛地应用于社会生活的各个领域。文章提出了一类观察值驱动的广义INAR(l)过程,推导了该模型的概率统计性质,并利用经验似然的方法研究了该模型的参数估计问题,给出了模型参数的极大经验似然估计量及其渐近分布。通过一系列的仿真实验,验证了经验似然方法的有效性。最后利用所提出的模型拟合了一组犯罪数据。

关键词：整值时间序列模型观察值驱动的广义INAR(1)过程条件最小二乘估计经验似然估计

本科通识教育选修课的教学设计与建设——以《移动互联网与APP应用实践》课程为例

在线全文

学校读者我要写书评

暂无评论

软件导刊.教育技术 2019年第3期18卷 14-16页

作者：王燕贾如于美菊内蒙古大学计算机学院内蒙古呼和浩特010021

通识教育选修课是本科阶段高等教育不可缺少的组成部分。以"工程技术与科技创新类"通识教育课程《移动互联网与APP应用实践》为例,探讨了通识教育选修课的教学设计与建设的细节,给出了该课程详细的目标设定、内容设置、主要特点以及教... 详细信息

通识教育选修课是本科阶段高等教育不可缺少的组成部分。以"工程技术与科技创新类"通识教育课程《移动互联网与APP应用实践》为例,探讨了通识教育选修课的教学设计与建设的细节,给出了该课程详细的目标设定、内容设置、主要特点以及教学实践过程中的资源建设、实验建设与教学方法。课程教学实践表明,通识教育选修课程对于全面培养学生素质,开拓学生眼界与提高学生实践能力,具有重要的意义。

关键词：通识教育教学设计教学建设移动互联网 APP

Influence of Negative Pressure Gradient on Pressure Distribution and Gas-Solid Flow Pattern of Solid Feed Systems

在线全文

学校读者我要写书评

暂无评论

China Petroleum Processing & Petrochemical Technology 2018年第2期20卷 104-110页

作者： Zhang meiju Pan Feng Shao Guoqiang Ge yu Zhang Lei State Key Laboratory of Multi-phase Complex Systems Institute of Process EngineeringChinese Academy of Sciences

A series of experiments on a solid feed system was performed to investigate the effect of negative pressure gradient on the gas-solid flow pattern and hydrodynamic *** on the non-fluidized gas-solid two phase flow and particulate mechanics in the standpipe,a method for predicting the pressure of the air passing through the recycle chamber and the pressure drop through the loop seal slit in these systems is also *** predicted pressure profile along the negative pressure gradient from the proposed model exhibits a good agreement with the experimental *** experimental data show that the gas flow in the standpipe is always upward in the negative pressure gradients,while the direction ofthe superficial gas velocity through the recycle chamber of the loop seal does not affect the pressure drop in *** increases with an increasing negative pressure gradient.

关键词： fuidized bed solid feedsystem negative pressure gradient gas-solid fow pattern

Theoretical and experimental cocrystal screening of temozolomide with a series of phenolic acids, promising cocrystal coformers

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2024年第5期35卷 407-417页

作者： Hongmei yu Baoxi Zhang meiju Liu Cheng Xing Guorong He Li Zhang Ningbo Gong Yang Lu Guanhua Du Beijing Key Laboratory of Polymorphic Drugs Institute of Materia MedicaChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100050China Beijing City Key Laboratory of Drug Target Identification and Drug Screening Institute of Materia MedicaChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100050China

The virtual cocrystal screening approach based on molecular electrostatic potential surface(MEPS)maps is a fast and feasible computational method to estimate the probability of cocrystal formation by calculating the difference in the interaction site pairing energies of monomers and that of their assemblies prior to experimental *** this paper,we report 12 cocrystal forms of temozolomide with mono-,di-,and trihydroxy benzoic acids,namely,3-hydroxy-,2,4-dihydroxy-,2,5-dihydroxy-,2,6-dihydroxy-,3,4-dihydroxy-,and 3,4,5-trihydroxy-benzoic acids,as well as benzoic acid,as pharmaceutical coformers for the first time.10 single crystals out of the 12 cocrystal forms were obtained and unequivocally determined by single-crystal X-ray diffraction,which clarified spatial arrangements,molecular conformations,and supramolecular *** further gains some insights into the sites of hydrogen bonding interactions for exploring combination patterns in these *** stability of TMZ was successfully achieved by cocrystallization with these acids.

关键词： Virtual Cocrystal Temozolomide Supramolecular synthon Phenolic acid Stability

GhCTSF1,a short PPR protein with a conserved role in chloroplast development and photosynthesis,participates in intron splicing of rpoC1 and ycf3-2 transcripts in cotton

在线全文

学校读者我要写书评

暂无评论

Plant Communications 2024年第6期5卷 213-229页

作者： yuzhu Huo Mengxue Cheng meiju Tang Meng Zhang Xiaofan Yang Yating Zheng Tong Zhao Peng He Jianing yu College of Life Sciences Shaanxi Normal UniversityXi’an 710119China

Cotton is one of the most important textile fibers *** crucial agronomic traits,leaves play an essential role in the growth,disease resistance,fiber quality,and yield of cotton *** repeat(PPR)proteins are a large family of nuclear-encoded proteins involved in organellar or nuclear RNA *** a virus-induced gene silencing assay,we found that cotton plants displayed variegated yellow leaf phenotypes with decreased chlorophyll content when expression of the PPR gene GhCTSF1 was ***1 encodes a chloroplast-localized protein that contains only two PPR *** of GhCTSF1 substantially reduces the splicing efficiency of rpoC1 intron 1 and ycf3 intron *** of function of the GhCTSF1 ortholog EMB1417 causes splicing defects in rpoC1 and ycf3-2,leading to impaired chloroplast structure and decreased photosynthetic rates in *** also found that GhCTSF1 interacts with two splicing factors,GhCRS2 and *** in GhCRS2 and GhWTF1 severely affect intron splicing of rpoC1 and ycf3-2 in cotton,leading to defects in chloroplast development and a reduction in *** results suggest that GhCTSF1 is specifically required for splicing rpoC1 and ycf3-2 in cooperation with GhCRS2 and GhWTF1.

关键词： chloroplast RNA splicing PPR protein cotton photosynthesis

RNA editing of mitochondria atp1 transcript are crucial for cotton fiber cell elongation and Arabidopsis trichomes development

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

RNA editing of mitochondria atp1 transcript are crucial for ...

中国植物学会第十六次全国会员代表大会暨85周年学术年会

作者： Peng He meiju Tang Jianing yu College of Life Sciences Shaanxi Normal University

Mitochondria are the powerhouses of plant cells which provide the energy necessary for cell *** plant mitochondria,transcriptional and post-transcriptional steps play predominant role in determining gene product *** complex post-transcriptional processes of plant mitochondria such as 5’ and 3’ end processing,RNA splicing,RNA editing and RNA stability are necessary to produce the mature *** one type of post-transcriptional modification,RNA editing occurs frequently in coding regions of mitochondria transcripts and editing events generally restore evolutionarily conserved amino acids,which is crucial for proper protein expression,function and *** of RNA editing in plant mitochondria often leads to severe consequences for plant development and *** this work,we conducted a mitochondria RNA-seq in Gossypium hirsutum and identified 692 RNA editing sites in mitochondrial *** of them were found in the CDS regions and preferentially located at the first or second codon ***,five editing sites in Ghatp1 were observed in fiber cells but not in *** synthase activity and the ATP/ADP ratio significantly increased during fiber ***,exogenous application of ATP in vitro significantly promoted cotton fiber cell elongation,whereas its inhibitor OM specifically repressed fiber *** analysis suggested that two vital editing sites in Ghatp1,C1292 and C1415,were essential for the interaction between the α and β subunits of ATP synthase,which was necessary for the production of *** experiment suggested that only C1292,C1415,or doubly edited Ghatp1 showed a significant accumulation of ATP,which increased the number of trichomes in leaves and promoted radicle ***,we suggested that editing at C1292 and C1415 sites in Ghatp1 are crucial for ATP synthase to produce sufficient ATP for cotton fiber cell elongation and Arabidopsis trichomes and radic

关键词： mitochondria RNA editing Gossypium hirsutum ATP syntahse

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

不同提取方法对姬菇多糖抗氧化活性的影响

南京师大学报（自然科学版） 2016年第4期39卷 65-70页

作者：王美菊陆文娟喻晨陶明煊南京师范大学金陵女子学院江苏南京210097

本研究采用传统水提法、超声波提取法、超声波辅助水提法、酸提法、碱提法、超声波辅助酸提法和超声波辅助碱提法7种方法提取姬菇多糖,测定还原力、羟自由基(·OH)清除率、超氧阴离子自由基(O_2^-·)清除能力、DPPH自由基清除力作为体... 详细信息

本研究采用传统水提法、超声波提取法、超声波辅助水提法、酸提法、碱提法、超声波辅助酸提法和超声波辅助碱提法7种方法提取姬菇多糖,测定还原力、羟自由基(·OH)清除率、超氧阴离子自由基(O_2^-·)清除能力、DPPH自由基清除力作为体外抗氧化作用的评价指标,并与Vc对照.结果表明酸法提取多糖得率最高,可达6.58%.总体来看,超声波辅助水提法所得姬菇多糖的抗氧化活性最好,多糖浓度为10 mg·m L^(-1)时其还原力达到2.18,·OH清除率为95.56%;多糖浓度为1 mg·m L^(-1)时,O_2^-·的清除率达到62.35%;多糖浓度为2 mg·m L^(-1)时,对DPPH自由基的清除率达到80.32%.超声波辅助碱提法所得多糖的抗氧化活性也较好,而超声波辅助酸提法所得多糖的抗氧化活性最差.由此可见,采用超声波辅助水提法所得多糖有利于姬菇多糖生物活性方面的研究.

关键词：姬菇多糖提取率抗氧化活性自由基

工业硫化钠法常压合成线型高分子量聚苯硫醚的研究

在线全文

学校读者我要写书评

暂无评论

高分子材料科学与工程 1999年第1期15卷 170-172页

作者：谢美菊严永刚余自力伍齐贤陈永荣李继红四川联合大学材料科学技术研究所

以精制工业硫化钠和对二氯苯为原料，采用多组分催化剂，在六甲基磷酰三胺（ＨＭＰＡ）中进行常压溶液缩聚，合成了线型高分子量的聚苯硫醚（ＬＨＰＰＳ）。研究了单体的配比、工业硫化钠的脱水和体系中含水量对聚合反应的影响，探索... 详细信息

以精制工业硫化钠和对二氯苯为原料，采用多组分催化剂，在六甲基磷酰三胺（ＨＭＰＡ）中进行常压溶液缩聚，合成了线型高分子量的聚苯硫醚（ＬＨＰＰＳ）。研究了单体的配比、工业硫化钠的脱水和体系中含水量对聚合反应的影响，探索了聚合反应过程中分子量的增长状况。测定了合成产品的熔融粘度和溶液粘度，应用元素分析、傅里叶变换红外光谱对合成产品进行了分析表征。用ＤＳＣ和ＴＧＡ测定了树脂的熔点Ｔｍ和初始热失重Ｔｄ，通过熔融挤出考察了树脂的加工热稳定性。结果表明，合成的树脂为线型高分子量ＰＰＳ树脂，具有优良的热性能和加工热稳定性。

关键词：工业硫化钠聚苯硫醚高分子量线型聚缩加压