检索结果-南通市图书馆

在线全文

学校读者我要写书评

暂无评论

炼化企业被动孤网安稳控制策略关键因素分析

安全、健康和环境 2018年第6期18卷 1-5页

作者：李志远刘维功时振堂张涌钱志红中国石油化工集团公司生产经营部北京100728 中国石化大连石油化工研究院辽宁大连116041

总结了电力行业和炼化企业孤网稳控技术的研究应用现状,分析了炼化企业孤网后的过渡过程,提出了炼化企业孤网稳定控制的关键是频率稳定。根据炼化企业电力系统特点,对影响系统稳定的关键因素,即受控电力负荷和供热机组探讨了建模方法,... 详细信息

总结了电力行业和炼化企业孤网稳控技术的研究应用现状,分析了炼化企业孤网后的过渡过程,提出了炼化企业孤网稳定控制的关键是频率稳定。根据炼化企业电力系统特点,对影响系统稳定的关键因素,即受控电力负荷和供热机组探讨了建模方法,提出了适用于炼化企业孤网的稳控策略。

关键词：炼化企业被动孤网稳定控制

自然环境影响下秦岭北麓乡村空间布局特征初探——以西安长安区留村为例

在线全文

学校读者我要写书评

暂无评论

建筑与文化 2015年第2期 49-52页

作者：谢晖钱芝弘桂露曹艺砾马艺培西安建筑科技大学建筑学院城乡规划系西安建筑科技大学建筑学院风景园林系

1秦岭北麓概况秦岭是中国地理气候分界线、重点生物功能区、重要水源涵养区,秦岭北麓紧临关中平原,是关中城市群的绿色生态屏障和重要的水源涵养地。秦岭北麓范围南起秦岭山脉25o线北至环山公路以北1000米,东西长约166公里,南北宽约2-3... 详细信息

1秦岭北麓概况秦岭是中国地理气候分界线、重点生物功能区、重要水源涵养区,秦岭北麓紧临关中平原,是关中城市群的绿色生态屏障和重要的水源涵养地。秦岭北麓范围南起秦岭山脉25o线北至环山公路以北1000米,东西长约166公里,南北宽约2-3公里,总面积533.03平方公里(图1)。秦岭北麓扼守着众多的山口、河口和峪口,

关键词：秦岭北麓留村自然环境影响乡村空间绿色生态屏障关中城市群地理气候北至布局特征水源涵养

在线全文

学校读者我要写书评

暂无评论

基于采收率最优的区块整体调剖方案设计研究

精细石油化工进展 2018年第2期19卷 22-25页

作者：钱志鸿姚峰汤元春邓秀模闻守斌中国石化江苏油田分公司石油工程技术研究院江苏扬州225009 东北石油大学黑龙江大庆163318

为保证区块整体调剖能最大限度提高原油采收率,设计三维非均质物理模型,考察整体调剖方案设计时单井调剖剂用量、井组间调剖剂用量分配、调剖顺序等对调剖效果的影响。结果表明,单井调剖剂用量增加,采收率增加明显;井组间调剖剂用量分... 详细信息

为保证区块整体调剖能最大限度提高原油采收率,设计三维非均质物理模型,考察整体调剖方案设计时单井调剖剂用量、井组间调剖剂用量分配、调剖顺序等对调剖效果的影响。结果表明,单井调剖剂用量增加,采收率增加明显;井组间调剖剂用量分配对调剖效果具有一定的影响,建议采取均衡调剖的原则;相邻注水井组调剖时,含水率较低或水窜不明显的井组优先调剖,最终采收率较高;3种因素对提高采收率影响的大小顺序为:调剖剂用量>调剖剂用量分配>调剖顺序。

关键词：整体调剖调剖顺序分配物理模拟提高采收率

不稳定型心绞痛患者白介素-10基因1082G/A多态性分析

在线全文

学校读者我要写书评

暂无评论

上海医药 2014年第21期35卷 46-48,54页

作者：史雷忠钱志宏李银福倪悦陈国琴江苏省溧阳人民医院心内科溧阳213300

目的:探讨中国常州地区人群白介素-10(IL-10)基因1082G/A多态性与不稳定型心绞痛(UAP)发病的关系。方法:招募了299例研究对象并分成UAP组(n=146)和对照组(n=153),经测序鉴定IL-10基因1082G/A多态性,并检测血糖和血脂等生化指标。结果:IL... 详细信息

目的:探讨中国常州地区人群白介素-10(IL-10)基因1082G/A多态性与不稳定型心绞痛(UAP)发病的关系。方法:招募了299例研究对象并分成UAP组(n=146)和对照组(n=153),经测序鉴定IL-10基因1082G/A多态性,并检测血糖和血脂等生化指标。结果:IL-10基因1082G/A在UAP组和对照组中均存在GG、AG和AA这3种基因型;3种基因型分布频率、等位基因分布频率与对照组相比均无统计学差异;调整对多个危险因素行多元logistic回归分析,示IL-10基因1082G/A 3种基因型与UAP的发病仍无相关性。结论:IL-10基因1082G/A多态性与中国常州地区人群UAP的发病无相关性。

关键词：不稳定型心绞痛白介素-10 基因多态性

Extended State Observer based Attitude Control of a Bird-like Flapping-wing Flying Robot

在线全文

学校读者我要写书评

暂无评论

Journal of Bionic Engineering 2020年第4期17卷 708-717页

作者： Keqiang Bai YunZhi Luo zhihong Dan Song Zhang Meiling Wang Qiumeng qian Jun Zhong School of Information Engineering Southwest University of Science and TechnologyRobot Technology Used for Special Environment Key Laboratory of Sichuan ProvinceMianyang 621010China Automation Research Institute Co. Ltd.of China South Industries Group CorporationMianyang 621000China Science and Technology on Altitude Simulation Laboratory AECC Sichuan Gas Turbine EstablishmentMianyang 621703China AECC Sichuan Gas Turbine Establishment Mianyang 621703China Chinese Academy of Sciences Hefei Institutes of Physical Science Hefei 230022China College of Mechanical and Electrical Engineering Hohai UniversityChangzhou 213022China

The attitude control system of a flapping-wing flying robot plays an important role in the precise orientation and tracking of the *** this paper,the modeling of a bird-like micro flapping-wing system is introduced,and the design of a sliding mode controller based on an Extended State Observer(ESO)is *** main design difficulties are the control law and the adaptive law for the attitude control *** address this problem,a sliding mode adaptive extended state observer algorithm is ***,a new extended state approximation method is used to estimate the final output as a disturbance ***,a sliding mode observer with good robustness to the model approximation error and external disturbance is used to estimate the system *** with traditional algorithms,this method is not only suitable for more general cases,but also effectively reduces the influence of the approximation error and ***,the simulation and experiment example is given to illustrate the implementation *** results show that the algorithm can effectively estimate the state of the attitude control system of the flapping-wing flying robot,and further guarantee the robustness of the model regarding error and external disturbance.

关键词： bionic attitude control flapping-wing flying robot sliding mode adaptive control extended state observer

Loose Sand Cemented by Microbial Cementitious Material:Composition,Microstructure and Mechanical Properties

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

Journal of Wuhan University of Technology(Materials Science) 2021年第5期36卷 714-719页

作者： ZHAN Qiwei WANG Shugang LIU Baoya PAN zhihong YU Xiaoniu qian Chunxiang School of Civil Engineering and Architecture Jiangsu University of Science and TechnologyZhenjiang 212100China Guangdong Provincial Key Laboratory of Building Energy Efficiency and Application Technologies Guangzhou UniversityGuangzhou 510006China Training Base PLA Army Engineering UniversityXuzhou 221004China Department of Civil and Environmental Engineering Nanyang Technological UniversitySingapore City639798Singapore College of Materials Science and Engineering Southeast UniversityNanjing 211189China

Through the influence of the dosage of culture solution and calcium source on hardness and compressive strength of samples,the formulation of microbial cementitious materials was optimized and *** influence of temperature on composition,microstructure and mechanical properties of loose sand cemented by microbial cementitious material was compared and analyzed *** the increase of temperature,the performance of loose sand was improved *** with cementitious properties could be induced at higher temperatures,but not at lower *** the temperature was 30℃,loose sand cemented by microbial cementitious material had more calcite and more dense ***,hardness and compressive strength were also *** wind tunnel test showed that the wind erosion resistance was improved obviously and the mass loss was lower at high *** properties of loose sand cemented by microbial cementitious material was measured *** comparative analysis,engineering properties of loose sand were basically unchanged,and there was no negative effect on the later period use of sand.

关键词： loose sand microbial cementitious material calcite microstructure mechanical properties

急性心肌梗死患者白介素10基因启动子-592C/A多态性分析

在线全文

学校读者我要写书评

暂无评论

现代医药卫生 2014年第21期30卷 3212-3214页

作者：李银福钱志宏倪悦陈国琴许浩蒋俊溧阳市人民医院心内科江苏溧阳213300 常州市武进医院心内科江苏常州213000

目的对急性心肌梗死(AMI)患者白介素-10(IL-10)基因启动子-592C/A进行多态性分析,探讨AMI患者IL-10基因-592C/A单核苷酸多态性分布及其与AMI发病的相关性。方法采用DNA试剂盒提取170例AMI患者(AMI组)及153例排除冠心病患者(对照组)的外... 详细信息

目的对急性心肌梗死(AMI)患者白介素-10(IL-10)基因启动子-592C/A进行多态性分析,探讨AMI患者IL-10基因-592C/A单核苷酸多态性分布及其与AMI发病的相关性。方法采用DNA试剂盒提取170例AMI患者(AMI组)及153例排除冠心病患者(对照组)的外周静脉血DNA,经聚合酶链反应(PCR)扩增目的 DNA片段后,用试剂盒回收PCR产物,测序鉴定IL-10基因启动子-592C/A多态性,并检测血糖和血脂等生化指标的变化。结果 IL-10基因启动子-592C/A在AMI组和对照组中均存在CC、AC和AA 3种基因型;两组患者3种基因型分布频率及A、C等位基因频率比较,差异均无统计学意义(P>0.05);经对多个危险因素的多元logistic回归分析显示,IL-10基因启动子-592C/A 3种基因型与AMI的发病不相关。结论 IL-10基因启动子-592C/A多态性可能与AMI的发病无明显关系。

关键词：白细胞介素10 多态现象,遗传基因型基因频率心肌梗死急性病江苏

在线全文

学校读者我要写书评

暂无评论

两种不同稳定剂对水焦浆稳定性的影响

洁净煤技术 2017年第2期23卷 78-81页

作者：钱宁波石志宏陈闰江虞午二范超耀宁波经济技术开发区热电有限公司浙江宁波315300

为提高水焦浆的稳定性,采用A、B两种稳定剂制备水焦浆,考察对比了2种稳定剂对水焦浆的表观黏度和析水率的影响。结果表明,A物质的添加量为0.3%时,随着浓度的增加,流动性逐渐变差,表观黏度上升,由873 m Pa·s增至1 039 m Pa·s,析水率由1... 详细信息

为提高水焦浆的稳定性,采用A、B两种稳定剂制备水焦浆,考察对比了2种稳定剂对水焦浆的表观黏度和析水率的影响。结果表明,A物质的添加量为0.3%时,随着浓度的增加,流动性逐渐变差,表观黏度上升,由873 m Pa·s增至1 039 m Pa·s,析水率由11.61%降至8.57%。B物质的添加量为0.3%时,随着浓度的增加,流动性逐渐变差,表观黏度由891 m Pa·s增至1 187 m Pa·s,析水率逐渐下降,由6.30%降至3.45%。2种添加剂均可提高水焦浆的稳定性。随着2种稳定剂添加量的增加,水焦浆黏度有所增加,析水率逐渐降低,即稳定性增加。添加0.3%的B物质时浆体的黏度低于添加0.6%的A物质的水焦浆黏度,而浆体的析水率也优于添加0.6%的A物质水焦浆的析水率,因此B物质对稳定性的提升效果要优于A物质。

关键词：石油焦水焦浆稳定剂稳定性表观黏度析水率

An AuNPs/Mesoporous NiO/Nickel Foam Nanocomposite as a Miniaturized Electrode for Heavy Metal Detection in Groundwater

在线全文

学校读者我要写书评

暂无评论

Engineering 2023年第8期27卷 199-208页

作者： Boyuan Xue qian Yang Kaidong Xia zhihong Li George Y.Chen Dayi Zhang Xiaohong Zhou State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China National Key Laboratory of Science and Technology on Micro/Nano Fabrication Institute of MicroelectronicsPeking UniversityBeijing 100871China Shenzhen Key Laboratory of Photonic Devices and Sensing Systems for Internet of Things Guangdong and Hong Kong Joint Research Centre for Optical Fiber SensorsShenzhen UniversityShenzhen 518060China College of New Energy and Environment Jilin UniversityChangchun 130021China The Research Institute of Environmental Innovation(Suzhou) Tsinghua UniversitySuzhou 215000China

Heavy metals,notably Pb2+and Cu^(2+),are some of the most persistent contaminants found in *** monitoring of these metals,which relies on efficient,sensitive,cost-effective,and reliable methods,is a *** present a nanocomposite-based miniaturized electrode for the concurrent measurement of Pb2+and Cu^(2+)by exploiting the electroanalytical technique of square wave *** also propose a facile in situ hydrothermal calcination method to directly grow binder-free mesoporous Ni O on a three-dimensional nickel foam,which is then electrochemically seeded with gold nanoparticles(Au NPs).The meticulous design of a low-barrier Ohmic contact between mesoporous Ni O and Au NPs facilitates target-mediated nanochannel-confined electron transfer within mesoporous Ni *** a result,the heavy metals Pb2+(0.020 mg.L^(-1)detection limit;2.0–16.0 mg.L^(-1)detection range)and Cu^(2+)(0.013 mg.L^(-1)detection limit;0.4–12.8 mg.L^(-1)detection range)can be detected simultaneously with high ***,other heavy metal ions and common interfering ions found in groundwater showed negligible impacts on the electrode’s performance,and the recovery rate of groundwater samples varied between 96.3%±2.1%and 109.4%±0.6%.The compactness,flexible shape,low power consumption,and ability to remotely operate our electrode pave the way for onsite detection of heavy metals in groundwater,thereby demonstrating the potential to revolutionize the field of environmental monitoring.

关键词： AuNPs Mesoporous NiO Miniaturized electrode Heavy metal ions Groundwater Square wave voltammetry