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

建筑结构隔震减灾技术的研究与应用

建筑机械 2024年第7期 104-106,112页

作者：丁通苗大成季长征生海龙郑维良刘海松山东省建筑工程质量检验检测中心有限公司山东济南250100 烟台市建设工程质量和安全监督站山东烟台264003 东营众诚检测有限公司山东东营257345 山东电力建设第一工程有限公司山东济南250000 山东省建筑科学研究院有限公司山东济南250031

随着对建筑物安全性能的要求越来越高,建筑结构隔震减灾技术逐渐成为研究的热点。文章介绍了建筑结构隔震减灾技术的基本原理和发展现状,详细讨论了各种隔震装置的特点和适用范围,包括橡胶隔震支座、滑移隔震支座、钢弹簧隔震支座等。... 详细信息

随着对建筑物安全性能的要求越来越高,建筑结构隔震减灾技术逐渐成为研究的热点。文章介绍了建筑结构隔震减灾技术的基本原理和发展现状,详细讨论了各种隔震装置的特点和适用范围,包括橡胶隔震支座、滑移隔震支座、钢弹簧隔震支座等。通过对这些隔震装置的分析和比较,探讨了它们在实际工程中的应用效果和存在的问题。最后对建筑结构隔震减灾技术的未来发展趋势进行了展望。

关键词：建筑结构隔震减灾隔震装置

Using Vector Representation of Propositions and Actions for STRIPS Action Model Learning

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Journal of Beijing Institute of Technology 2018年第4期27卷 485-492页

作者： wei gao Dunbo Cai Beijing Aerospace Control Center Beijing 100094China School of Computer Science and Engineering Wuhan Institute of TechnologyWuhan 430205China

Action model learning has become a hot topic in knowledge engineering for automated planning.A key problem for learning action models is to analyze state changes before and after action executions from observed"plan traces".To support such an analysis,a new approach is proposed to partition propositions of plan traces into ***,vector representations of propositions and actions are obtained by training a neural network called Skip-Gram borrowed from the area of natural language processing(NLP).Then,a type of semantic distance among propositions and actions is defined based on their similarity measures in the vector ***,k-means and k-nearest neighbor(kNN)algorithms are exploited to map propositions to *** approach is called state partition by word vector(SPWV),which is implemented on top of a recent action model learning framework by Rao et *** results on the benchmark domains show that SPWV leads to a lower error rate of the learnt action model,compared to the probability based approach for state partition that was developed by Rao et al.

关键词： automated planning action model learning vector representation of propositions

Foundry manufacturing of tight-confinement,dispersion-engineered,ultralow-loss silicon nitride photonic integrated circuits

在线全文

学校读者我要写书评

暂无评论

Photonics Research 2023年第4期11卷 558-568页

作者： ZHICHAO YE HAIYAN JIA ZHANGJUN HUANG CHEN SHEN JINBAO LONG BAOQI SHI YI-HAN LUO LAN gao wei SUN HAIRUN GUO JIJUN HE JUNQIU LIU Qaleido Photonics Hangzhou 310000China International Quantum Academy Shenzhen 518048China Shenzhen Institute for Quantum Science and Engineering Southern University of Science and TechnologyShenzhen 518055China Department of Optics and Optical Engineering University of Science and Technology of ChinaHefei 230026China Key Laboratory of Specialty Fiber Optics and Optical Access Networks Shanghai UniversityShanghai 200444China Key Laboratory of Radar Imaging and Microwave Photonics Ministry of EducationNanjing University of Aeronautics and AstronauticsNanjing 210016China Hefei National Laboratory University of Science and Technology of ChinaHefei 230088China

The foundry development of integrated photonics has revolutionized today’s optical interconnect and *** the last decade,we have witnessed the rising of silicon nitride(Si_(3)N_(4)) integrated photonics,which is currently transferring from laboratory research to foundry *** development and transition are triggered by the ultimate need for low optical loss offered by Si_(3)N_(4),which is beyond the reach of silicon and III-V *** with modest Kerr nonlinearity,tight optical confinement,and dispersion engineering,Si_(3)N_(4) has today become the leading platform for linear and Kerr nonlinear photonics,and it has enabled chip-scale lasers featuring ultralow noise on par with table-top fiber ***,so far all the reported fabrication processes of tight-confinement,dispersion-engineered Si_(3)N_(4) photonic integrated circuits(PICs)with optical loss down to few dB/m have only been developed on 4-inch(100 mm diameter)or smaller ***,to transfer these processes to established CMOS foundries that typically operate 6-inch or even larger wafers,challenges *** this work,we demonstrate the first foundry-standard fabrication process of Si_(3)N_(4) PICs with only 2.6 dB/m loss,thickness above 800 nm,and near 100%fabrication yield on 6-inch(150 mm diameter)*** thick and ultralow-loss Si_(3)N_(4) PIC enables low-threshold generation of soliton frequency *** with advanced heterogeneous integration,active ultralow-loss Si_(3)N_(4) integrated photonics could pave an avenue to addressing future demands in our increasingly information-driven society.

关键词： dispersion soliton tight

Co-Free High-Entropy Alloys Powders Immobilized by Electrospray and Microf luidics for Decolorization of Azo Dye

在线全文

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 2020年第8期33卷 1103-1110页

作者： Shikai Wu wei gao Tao Lu Ye Pan School of Materials Science and Engineering Jiangsu Key Laboratory for Advanced Metallic MaterialsSoutheast UniversityNanjing 211189China School of Energy and Environment Key Laboratory of Energy Thermal Conversion and Control of Ministry of EducationSoutheast UniversityNanjing 211189China

In recent years,high-entropy alloys(HEAs)have received more and more attention due to their unique microstructure and *** researchers have reported that some ball-milled(BM)HEAs powders possess prominent decolorization performance for azo *** kinds of Co-free HEA powders(AlCrFeMn,AlCrFeNi and FeCrNiMn)have been synthesized by ball milling in this work,of which AlCrFeMn shows the best decolorization efficiency for DB6 aqueous ***,at this time,the BM HEAs are in powder state and not easy to be reused,so the loss rate of the powders is high during the ***,the reaction between reacted the powders and the dye solution is too fast to ***,in order to solve these problems,this work proposes to immobilize bare BM AlCrFeMn HEA powders in calcium alginate beads(CAB s)by electrospray and *** four cycles of reaction,the loss rate of the AlCrFeMn powders can be reduced from 40 to 5 wt%if the powders are immobilized by CABs with an average diameter of 0.55 mm obtained at the DC voltage of 30 *** addition,in the four cycles of experiment,the AlCrFeMn HEA-CABs with an average diameter of0.55 mm shows better stability and easier separation than that of the bare AlCrFeMn *** findings provide new ideas for HEAs to decolorize azo dyes and are of great significance for protecting freshwater resources.

关键词： High-entropy alloys Ball-milled Decolorization performance Calcium alginate beads Electrospray and microfluidics

3D Co(II, III) mixed-valence metal-organic framework affording field-induced slow magnetic relaxation

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2015年第6期58卷 1032-1038页

作者： sheng Zhang Xiangyu Liu Bin Liu Zhengqiang Xia weitao Wang Qi Yang Hongshan Ke Qing wei Gang Xie Sanping Chen shengli gao Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education College of Chemistry and Materials Science Northwest University School of Chemistry and Chemical Engineering Ningxia University College of Chemistry and Chemical Engineering Shaanxi University of Science & Technology

A 3D mixed-valence Co(III)–Co(II) compound [Co9(bta)10(Hbta)2(H2O)10]n·[22(H2O)]n(1)(H2bta=N,N-bis(1H-tetrazole-5-yl)-amine) was hydrothermally synthesized by reaction of Co(NO3)2·6H2O with H2bta·H2O. Compound 1 consists of three kinds of distorted-octahedral [CoII(N4O2)] paramagnetic nodes which are separated by [CoIII(bta)2(Hbta)]2-/[CoIII(bta)3]3-diamagnetic linkers to generate a 3D porous metal-organic framework(MOF) with alternative ···Co(III)···Co(II)··· array and channels incorporating water molecules. Under an applied magnetic field of 4000 Oe, compound 1 exhibits slow relaxation of magnetization at low temperatures, giving △E/kB=30.00 K and τ0=2.0×10-8 s.

关键词：金属有机骨架混合价 Co 电场感应三维磁弛豫 Hbta 水分子通道

黄芪多糖对黄喉拟水龟生长性能、血清生化指标及肠道菌群结构的影响

在线全文

学校读者我要写书评

暂无评论

南方农业学报 2024年第2期55卷 388-396页

作者：吴志刚张洪耀高铭佐严子科谭雯予韩书煜施金谷黄德生梁静真黄钧广西大学动物科学技术学院/广西水生动物病害诊断实验室/广西高校水生生物健康养殖与营养调控重点实验室广西南宁530004 广西水产技术推广站广西南宁530022 合浦县水产技术推广站广西北海536199

【目的】探究饲料中添加不同水平的黄芪多糖对黄喉拟水龟(Mauremys mutica)生长性能、血清生化指标和肠道菌群结构的影响,以期为黄芪多糖在黄喉拟水龟饲料中的应用及黄喉拟水龟的健康养殖提供理论依据。【方法】将初始平均体重为128.36... 详细信息

【目的】探究饲料中添加不同水平的黄芪多糖对黄喉拟水龟(Mauremys mutica)生长性能、血清生化指标和肠道菌群结构的影响,以期为黄芪多糖在黄喉拟水龟饲料中的应用及黄喉拟水龟的健康养殖提供理论依据。【方法】将初始平均体重为128.36±1.80g的黄喉拟水龟随机分为5组,分别投喂黄芪多糖含量为0(M0,对照组)、0.25%(M25)、0.50%(M50)、0.75%(M75)和1.00%(M100)的等氮等脂饲料,每组设3个重复,每重复10只龟,投喂60 d后测定其生长性能指标和血清生化指标,以高通量测序分析肠道菌群结构。【结果】生长性能分析结果显示,M25、M50和M75组的黄喉拟水龟的增重率和特定生长率显著高于M0组(P0.05,下同)。血清生化指标检测结果显示,M25、M50和M75组的碱性磷酸酶和超氧化物歧化酶活性显著高于M0组,M50、M75和M100组的过氧化氢酶活性显著高于M0组;M25、M50和M75组的丙二醛含量显著降低。肠道菌群分析结果显示,M25组群落丰富度指数(Sobs指数和ACE指数)显著高于M0组,群落多样性指数(Shannon指数和Simpson指数)与M0组无显著差异。M50、M75和M100组的Sobs指数、Chao1指数、ACE指数、Shannon指数和Simpson指数与M0组差异均不显著。在门分类水平上,各组丰度占比排名前3的菌群均为厚壁菌门、拟杆菌门和变形菌门,0.25%~1.00%的黄芪多糖对门分类水平的肠道菌群组成无显著影响。在属分类水平上,M50组的瘤胃球菌属1和M75组的汉氏盐单胞菌属相对丰度显著提高;添加0.25%和1.00%的黄芪多糖对属分类水平的肠道菌群组成均无显著影响。【结论】饲料中添加适量的黄芪多糖能有效地促进黄喉拟水龟生长、提高抗氧化能力并改善肠道菌群结构。综合分析,建议饲料中黄芪多糖添加量为0.50%。

关键词：黄芪多糖黄喉拟水龟生长性能血清生化指标肠道菌群结构

A Mathematical Model Based on Supply Chain Optimization for International Petrochemical Engineering Projects

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

China Petroleum Processing & Petrochemical Technology 2015年第2期17卷 91-100页

作者： gao Ning Sun wei College of Chemical Engineering Beijing University of Chemical Technology SINOPEC Great Wall Energy and Chemical Co. Ltd.

Based on the study of supply chain(SC) and SC optimization in engineering projects, a mixed integer nonlinear programming(MINLP) optimization model is developed to minimize the total SC cost for international petrochemical engineering projects. A steam cracking project is selected and analyzed, from which typical SC characteristics in international engineering projects in the area of petrochemical industry are summarized. The MINLP model is therefore developed and applied to projects with detailed data. The optimization results are analyzed and compared by the MINLP model, indicating that they are appropriate to SC management practice in engineering projects, and are consistent with the optimal priceeffective strategy in procurement. As a result, the model could provide useful guidance to SC optimization of international engineering projects in petrochemical industry, and improve SC management by selecting more reliable and qualified partner enterprises in SC for the project.

关键词：国际工程项目供应链管理优化模型石化行业数学模型 MINLP模型混合整数非线性规划蒸汽裂解

Trend analysis for evaluating the consistency of Terra MODIS and SPOT VGT NDVI time series products in China

在线全文

学校读者我要写书评

暂无评论

Frontiers of Earth Science 2015年第1期9卷 125-136页

作者： Youzhi AN wei gao Zhiqiang gao Chaoshun LIU Runhe SHI Key Laboratory of Geographic Information Science Ministry of Education East China Normal University Joint Laboratory for Environmental Remote Sensing and Data Assimilation ECNU & CEODE CAS Shanghai 200062 China Natural Resource Ecology Laboratory Colorado State University Fort Collins CO 80523 USA Yantai Institute of Coastal Zone Research Chinese Academy of Sciences Yantai 264003 China

The Normalized Difference Vegetation Index （NDVI） is an important vegetation greenness indicator. Compared to the AVHRR GIMMS NDVI data, the availability of two datasets with 1 km spatial resolution, i.e., Terra MODIS （MODI3A3） monthly composite and SPOT Vegetation （VGT） 10-day composite NDVI, extends the application dimensions at spatial and temporal scales. An overlapping period of 12 years between the datasets now makes it possible to investigate the consistency of the two datasets. Linear regression trend analysis was performed to compare the two datasets in this study. The results show greater consistency in regression slopes in the semi-arid regions of northern China. Alternatively, the results show only slight changes in the Terra MODIS NDVI regression slope in most areas of southern China whereas the SPOT VGT NDVI shows positive changes over a large area. The corresponding regression slope values between Terra MODIS and SPOT VGT NDVI datasets from the linear fit had a fair agreement in the spatial dimension. However, larger positive and negative differences were observed at the junction of the three regions （East China, Central China, and North China）. These differences can be partially explained by the positive standard deviation differences distributed over a large area at the junction of these three regions. This study demonstrated that Terra MODIS and SPOT VGT NDVI have a relatively robust basis for characterizing vegetation changes in annual NDVI in most of the semi-arid and arid regions in northern China.

关键词： Terra MODIS NDV1 SPOT VGT NDVI,trend analysis correlation analysis

西藏门巴族人群胰岛细胞功能、脂质代谢、炎症反应与中医体质的相关性研究

在线全文

学校读者我要写书评

暂无评论

中国现代医学杂志 2024年第13期34卷 91-96页

作者：劳美铃魏爱生何芬黄中梁王文会邓声敏杨东山张珏阿旺仓决郭燕佛山市中医院内分泌科广东佛山528000 佛山市中医院康复医学科广东佛山528000 佛山市中医院针灸科广东佛山528000 佛山市中医院心内科广东佛山528000 西藏自治区墨脱县人民医院大内科西藏墨脱县860700 西藏自治区墨脱县藏医院西藏墨脱县860700 西藏自治区墨脱县人民医院中医科西藏墨脱县860700

目的探讨西藏门巴族人群胰岛细胞功能、脂质代谢和炎症反应与中医体质的相关性。方法选取2023年1月—2023年6月墨脱村、亚东村、朗杰岗村、巴日村、德吉村、玛迪村6个门巴族乡的门巴族人群进行调查,共计237例。分析人群中医体质分布情况... 详细信息

目的探讨西藏门巴族人群胰岛细胞功能、脂质代谢和炎症反应与中医体质的相关性。方法选取2023年1月—2023年6月墨脱村、亚东村、朗杰岗村、巴日村、德吉村、玛迪村6个门巴族乡的门巴族人群进行调查,共计237例。分析人群中医体质分布情况,同时比较前三位中医体质人群的胰岛细胞功能、脂质代谢和炎症因子水平。结果中医体质类型中以痰湿质、湿热质和气虚质为主,分别占32.07%、26.16%和18.57%。痰湿质组、湿热质组和气虚质组性别、年龄、体质量指数比较,差异均无统计学意义(P>0.05)。湿热质组空腹血糖和胰岛素抵抗指数分别为(4.98±0.83)mmol/L和(1.75±0.32),均低于痰湿质组和气虚质组(P0.05)。结论西藏门巴族人群中医体质以痰湿质、湿热质和气虚质为主,其中湿热质人群胰岛细胞功能、脂质代谢优于痰湿质和气虚质人群,炎症因子比较无差异。

关键词：胰岛细胞功能脂质代谢炎症反应中医体质西藏门巴族