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浅谈BIM建模技术在水利工程中的应用

建筑与装饰 2024年第11期 127-129页

作者：刘洪英山东省青岛市莱西市院上镇人民政府山东青岛 266000

近年来,我国的建筑行业随着社会发展不断进步,建筑规模、种类不断增加.现阶段,作为将建设项目从物理与功能特性层面的数字表达方式,BIM技术的应用具有知识资源共享的特征,可为建筑从建设到拆除的全周期所有决策提供有效依据.不同项目阶... 详细信息

近年来,我国的建筑行业随着社会发展不断进步,建筑规模、种类不断增加.现阶段,作为将建设项目从物理与功能特性层面的数字表达方式,BIM技术的应用具有知识资源共享的特征,可为建筑从建设到拆除的全周期所有决策提供有效依据.不同项目阶段的利益方基于BIM技术通过插入与提取信息,可明确协同作业要点和职责,以保证工程的建设效果.本文简述了BIM技术与其主要优势,并基于应用特点浅析水利工程施工管理特点及质量控制策略.

关键词： BIM技术建设与管理应用

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新课标背景下高中语文古诗词教学研究

语文教学之友 2024年第7期43卷 35-38页

作者：刘宏英赵奕辰河北北方学院文学院

《普通高中语文课程标准(2017年版2020年修订)》要求在古诗词教学中培养学生的核心素养,注重学生在学习中的过程性评价,并在古诗词教学中构建学习任务群。因此,教师要在此基础上根据统编版高中语文教材中古诗词的选编特点展开教学。首先... 详细信息

《普通高中语文课程标准(2017年版2020年修订)》要求在古诗词教学中培养学生的核心素养,注重学生在学习中的过程性评价,并在古诗词教学中构建学习任务群。因此,教师要在此基础上根据统编版高中语文教材中古诗词的选编特点展开教学。首先,利用教材中的新系统进行教学;其次,要依据教材的特点教学;最后,要在古诗词教学中提高学生的审美能力,从而培养学生的核心素养,改进教学手段。

关键词：新课标高中语文古诗词教学

不同密度下玉米掖478衍生系产量相关性状的配合力分析

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玉米科学 2024年第1期32卷 33-38页

作者：杨泽兵谭家颖王浩汪程侯宪斌柏光晓易强刘应红贵州大学农学院贵阳550025 百色学院农业与食品工程学院广西百色533000 四川农业大学玉米研究所成都511130

用掖478衍生系K22、沈5003、U8112、早48和郑58为被测系,以Mo17、齐319、丹340和昌7-2为测验系,基于NCII设计得到20个杂交组合,在高、低种植密度下对产量相关性状进行配合力分析。结果表明,掖478衍生系及其杂交种的产量性状受密度、基... 详细信息

用掖478衍生系K22、沈5003、U8112、早48和郑58为被测系,以Mo17、齐319、丹340和昌7-2为测验系,基于NCII设计得到20个杂交组合,在高、低种植密度下对产量相关性状进行配合力分析。结果表明,掖478衍生系及其杂交种的产量性状受密度、基因型等影响。早48和郑58的4个以上穗部性状的一般配合力在高密度下效应值较高,且高于低密度下的效应值。早48×丹340和郑58×齐319在高密度下单穗粒重最高且多数性状特殊配合力均为正效应。早48和郑58在高密度下综合表现较其他衍生系更好,在该区域耐密高产育种中可以重点利用。

关键词：玉米掖478衍生系产量相关性状耐密性配合力分析

Hydrogen peroxide is a risk factor for occupational chemical poisoning

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Chinese Medical Journal 2021年第7期134卷 881-882页

作者： Xiao-Yan Yang hong-ying liu Departm ent of Occupational Health Ankang Center for Disease Control and PreventionAnkangShaanxi 725000China Department of Occupational Health Baoji Center for Disease Control and PreventionBaojiShaanxi 721000China

To the Editor:Hydrogen peroxide is a strong oxidant,which is commonly used as a disinfectant mainly in medical and chemical *** peroxide poisoning causes brain infarction,and ingestion of hydrogen peroxide injures the upper gastrointestinal tract.[1]Besides,food poisoning is often caused due to hydrogen peroxide.A case has been reported in China that cerebral embolism was caused by oral hydrogen peroxide poisoning.[2]The first two cases of hydrogen peroxide poisoning caused by sterilization and disinfection in China are illustrated in this article.

关键词： hydrogen peroxide chemical

Influence of Solvent Size on Structural Properties of Bottle-brush Polymers

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Chemical Research in Chinese Universities 2010年第5期26卷 838-841页

作者： liu ying-tao liu hong liu Yu-hua LU Zhong-yuan State Key Laboratory of Theoretical and Computational Chemistry Institute of Theoretical Chemistry Jilin University Changchun 130021 P. R. China

We proposed a modified dissipative particle dynamics simulation model by which one can effectively avoid the bond-crossing problem, and investigated the effect of solvent size on the structural properties of bottle-brush polymers in dilute solution on the basis of this model. It was found that with the increase of solvent size, the radius of the gyration of the bottle-brush polymer decreases considerably in the athermal solvent but increases in the selective solvent favoring the backbone, respectively.

关键词： Dissipative particle dynamics Bottle-brush polymer Solvent size Bond-crossing

Roll Subsectional Cooling Adaptive Fuzzy Control Based on Fuzzy Model Inversion

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Journal of Iron and Steel Research International 2010年第4期17卷 39-44页

作者： SHAN Xiu-ying liu hong-min JIA Chun-yu Engineering Research Center of Rolling Equipment and Complete Technology of Ministry of Education State Key Laboratory of Metastable Materials Science and Technology Yanshan University Qinhuangdao 066004 Hebei China

Flatness is an important equality indicator of strip rolling and roll subsectional cooling is an important method for flatness control, especially for high order flatness component control. It is very hard to build the mathematic model of roll subsectional cooling because of its characteristics of nonlinearity, hysteresis quality and strong coupling, etc. In order to improve the control effect of roll subsectional cooling control model, the roll subsectional cooling adaptive fuzzy control model based on fuzzy model inversion is built according to the separation principle of fuzzy form on the basis of the conventional fuzzy control model, where the parameters of the fuzzy controller can be dynamically regulated according to the change of rolling conditions. Simulation experiment results of the model indicate that the proposed roll subsectional cooling adaptive fuzzy control model based on fuzzy model inversion has high control precision and rapid response speed with strong self-learning and anti-interference capacity and a new method is provided for high precision flatness control.

关键词： fuzzy identification subsectional cooling adaptive fuzzy control flatness control

Inhibitory effects of miRNA-200c on chemotherapy-resistance and cell proliferation of gastric cancer SGC7901/DDP cells

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Chinese Journal of Cancer 2010年第12期29卷 1006-1011页

作者： Yong Chen Jing Zuo ying liu hong Gao Wei liu Department of Medical Oncology Hebei Medical University Shijiazhuang Hebei 050011 P. R. China

Background and Objective: miRNA-200c can not only inhibit the aggressiveness of cancer cells but also increase the sensitivity of cells to antitumor drugs. However, some mechanisms are still unclear. Recent researches revealed that E-cadherin is more than an inhibitor of metastasis, and it also plays important roles in reversing drug resistance. We had previously found that miRNA-200c could not only induce the expression of E-cadherin but also increase the sensitivity of gastric cancer SGC7901/DDP cells to cisplatin (DDP). This study aimed to explore the effects of miRNA-200c on biological characteristics of SGC7901/DDP cells and the roles of E-cadherin in the regulatory pathway of miRNA-200c. Methods: SGC7901/DDP cells and its parental cell line SGC7901 cells were transfected with miRNA-200c precursor (Pre-200c) and E-cadherin siRNA, respectively. Real-time RT-PCR was used to detect miRNA-200c expression after transfection with Pre-200c in SGC7901/DDP cell line. Drug sensitivities to DDP, 5-fluorouracil (5-FU), paclitaxel, and adriamycin (ADR) after transfection were tested using MTT assay. The proliferation of SGC7901/DDP cells was also detected after transfection. The protein changes of E-cadherin, Bax, and Bcl-2 after transfection were detected by Western blot. Results: The miRNA-200c expression in SGC7901/DDP cells after transfection of Pre-200c was 7.128 ± 0.159 times of that in negative control (P < 0.05). The IC50 of DDP, 5-FU, paclitaxel, and ADR in Pre-200c-transfected group were significantly lower than that in negative control group (P < 0.05). Compared to the control group, cell proliferation was significantly decreased (P < 0.05). The relative protein expressions of E-cadherin and Bax in Pre-200c-transfected group were significantly higher than those in negative control group (P < 0.05), whereas Bcl-2 was significantly lower than that in control (P < 0.05). Additionally, E-cadherin protein expression was significantly inhibited after transfected with E

关键词： miRNA 增殖细胞胃癌细胞 C型 siRNA 细胞转染钙粘蛋白化疗

Inhibiting effect of short hairpin RNA on expression of transforming growth factor-β1 in human peritoneal mesothelial cells induced by peritoneal dialysis solution

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Chinese Medical Journal 2005年第18期118卷 1552-1556页

作者： liu Fu-you LING Guang-hui liu hong PENG You-ming liu ying-hong DUAN Shao-bin Department of Nephrology Second Xiangya Hospital Central SouthUniversity Changsha 410011 China

The peritoneum response to peritoneal dialysis can lead to fibrosis. The transforming growth factor-β1 （TGF-β1） plays an important role in regulating tissue repair and remodeling after injury. Excessive synthesis and deposition of matrix proteins by peritoneal mesothelial cells can lead to structural and functional changes in the peritoneal membrane, jeopardizing the long-term efficacy of peritoneal dialysis （PD）. Prolonged exposure to high glucose concentrations in PD fluid has been implicated as a major stimulus to matrix accumulation, through the induction of transforming growth factor-β1 （TGF-β1）.

关键词： human peritoneal mesothelial cells·peritoneal dialysis solution·transforming growth factor-β1 RNA interference

含新颖一维金属氧簇阳离子的聚金属氧簇化合物[{M(2,2'-bipy)}_5O_(14)]_4-[2,2'-H_2bipy]_2(As_2W_(18)O_(62))_2·8H_2O(M=Mo,W)的合成、晶体结构与表征

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化学学报 2007年第17期65卷 1826-1830页

作者：王敬平王伟刘迎红牛景杨河南大学化学化工学院分子与晶体工程研究所开封475001

以Na2WO4·2H2O,Na2MoO4·2H2O,Na2HAsO4·7H2O和2,2'-bipyridine为原料,在水热条件下制得了含一维阳离子的聚金属氧簇化合物:[{M(2,2'-bipy)}5O14]4[2,2'-H2bipy]2(As2W18O62)2·8H2O(M=Mo/W;2,2'-bipy=2,2'-bipyridyl),并用元素分析,IR,TG和单晶X-ray衍射等手段进行了表征.标题化合物属于单斜晶系,C2/c空间群,a=4.1721(5)nm,b=2.4629(5)nm,c=1.7541(5)nm,β=91.119(3)°,V=18.021(5)nm3,Z=2,R1=0.0629,wR2=0.1605[I>2σ(I)].标题化合物的阳离子链由五元金属氧簇构筑块[{M(2,2'-bipy)}5O14]2+通过氧原子桥联而成,构筑块[{M(2,2'-bipy)}5O14]2+中的五个金属原子呈畸变的"A"字型排布,阳离子展现出新颖的一维锯齿链状结构.

关键词：聚金属氧簇化合物晶体结构水热合成 Dawson结构