检索结果-南通市图书馆

Prediction of forming limit curve(FLC) for Al–li alloy 2198-T3 sheet using diferent yield functions

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Aeronautics 2013年第5期26卷 1317-1323页

作者： li Xiaoqiang song Nan Guo Guiqiang Sun Zhonggang School of Mechanical Engineering and Automation Beijing University of Aeronautics and Astronautics Aeronautical Manufacturing Technology Institute Shanghai Aircraft Manufacturing Co.Ltd.

The Forming limit Curve （FLC） of the third generation aluminum-lithium （Al-li） alloy 2198-T3 is measured by conducting a hemispherical dome test with specimens of different widths. The theoretical prediction of the FLC of 2198-T3 is based on the M-K theory utilizing respectively the von Mises, Hill＇48, Hosford and Barlat 89 yield functions, and the different predicted curves due to different yield functions are compared with the experimentally measured FLC of 2198-T3. The results show that though there are differences among the four predicted curves, yet they all agree well with the experimentally measured curve. In the area near the planar strain state, the predicted curves and experimentally measured curve are very close. The predicted curve based on the Hosford yield function is more accurate under the tension-compression strain states described in the left part of the FLC, while the accuracy is better for the predicted curve based on Hill＇48 yield function under the tension-tension strain states shown in the right part.

关键词： Aluminum-lithium alloy Fracture Forming limit curve M-K theory Theoretical prediction

Polymeric Wetting Matrix for a Stable Interface between Solid-state Electrolytes and li Metal Anode

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Structural Chemistry 2022年第5期41卷 48-54页

作者： Haoran song Shida Xue Shiming Chen Zijian Wang Yongli song Jiawen li Zhibo song Luyi Yang Feng Pan School of Advanced Materials Peking University Shenzhen Graduate SchoolShenzhen 518055China

Succinonitrile(SN)based solid-state electrolytes(SSEs)have potential applications in lithium(li)batteries due to their ease of preparation and high ionic conductivity at room ***,a novel SSE consisting of poly(vinylidene fluoride-hexafluoropropy-lene)(PVDF-HFP),poly(methyl methacrylate)(PMMA)and li_(1.3)Al_(0.3)Ti_(1.7)(PO_(4))_(3) with SN is fabricated,where PMMA is added to serve as a polymer matrix for better wettability of *** to the addition of PMMA,improved room-temperature ionic conductivity of the SSE is *** importantly,better interfacial contact as well as more stable solid-state electrolyte(SEI)layer between SSE and li anode can be also *** a result,homogeneous and dendrite-free li plating can be achieved for over 1000 h in li symmetric *** coupled with liNi_(0.5)Mn_(0.3)Co_(0.2)O_(2) cathode and li anode,the proposed SSE delivers excellent cycling stability and rate capability in *** implementing SSEs with a polymeric wetting agent,this work provides fresh perspectives on stabilizing the interface between SSEs and li metal anodes.

关键词： li metal li dendrite poly(methyl methacrylate) succinonitrile composite solid-state electrolyte

AAV-mediated expression of p65shRNA and bone morphogenetic protein 4 synergistically enhances chondrocyte regeneration

在线全文

学校读者我要写书评

暂无评论

中国组织工程研究 2025年第17期29卷 3537-3547页

作者： Yu Yangyi song Zhuoyue lian Qiang Ding Kang li Guangheng Shenzhen Key Laboratory of Musculoskeletal Tissue Reconstruction and Function Restoration Division of Adult Joint Reconstruction and Sports MedicineDepartment of Orthopedic SurgeryShenzhen People’s Hospital(The Second Clinical Medical College Jinan UniversityThe First Affiliated HospitalSouthern University of Science and Technology)Shenzhen 518020Guangdong ProvinceChina Department of Orthopedics Zhengzhou Orthopedics HospitalZhengzhou 450000Henan ProvinceChina Department of Orthopedics Shenzhen Pingle Orthopedics HospitalShenzhen 518000Guangdong ProvinceChina

BACKGROUND:Adeno-associated virus(AAV)gene therapy has been proven to be reliable and safe for the treatment of osteoarthritis in recent ***,given the complexity of osteoarthritis pathogenesis,single gene manipulation for the treatment of osteoarthritis may not produce satisfactory *** studies have shown that nuclear factorκB could promote the inflammatory pathway in osteoarthritic chondrocytes,and bone morphogenetic protein 4(BMP4)could promote cartilage ***:To test whether combined application of AAV-p65shRNA and AAV-BMP4 will yield the synergistic effect on chondrocytes regeneration and osteoarthritis ***:Viral particles containing AAV-p65-shRNA and AAV-BMP4 were *** efficacy in inhibiting inflammation in chondrocytes and promoting chondrogenesis was assessed in vitro and in vivo by transfecting AAV-p65-shRNA or AAV-BMP4 into *** experiments were divided into five groups:PBS group;osteoarthritis group;AAV-BMP4 group;AAV-p65shRNA group;and BMP4-p65shRNA 1:1 *** were collected at 4,12,and 24 weeks *** staining,including safranin O and Alcian blue,was applied after collecting articular ***,the optimal ratio between the two types of transfected viral particles was further investigated to improve the chondrogenic potential of mixed cells in *** AND CONCLUSION:The combined application of AAV-p65shRNA and AAV-BMP4 together showed a synergistic effect on cartilage regeneration and osteoarthritis *** cells transfected with AAV-p65shRNA and AAV-BMP4 at a 1:1 ratio produced the most extracellular matrix synthesis(P<0.05).In vivo results also revealed that the combination of the two viruses had the highest regenerative potential for osteoarthritic cartilage(P<0.05).In the present study,we also discovered that the combined therapy had the maximum effect when the two viruses were administered in equal *** either p65shRNA or BMP4

关键词： osteoarthritis adeno-associated virus bone morphogenetic protein 4 p65-short hairpin RNA gene therapy short hairpin RNA transforming growth factor-β1 extracellular matrix articular cartilage chondrocytes.

在线全文

学校读者我要写书评

暂无评论

农村供水站管理中图像抓拍装置的设计与实现

浙江水利科技 2018年第5期46卷 60-63页

作者：屠佳佳李莎宋立松刘锋浙江机电职业技术学院电气电子技术系浙江杭州310053 杭州定川信息技术有限公司浙江杭州310020 浙江省水利河口研究院浙江杭州310020

针对农村供水站标准化建设试点中,无线图像抓拍时存在的使用移动侦测功能图像抓拍数量过多造成用户查看数据不方便以及大大增加流量成本的现象,以及使用定时抓拍功能经常拍不到管理人员进门导致抓拍效果不佳的情况,提出并设计了一种基... 详细信息

针对农村供水站标准化建设试点中,无线图像抓拍时存在的使用移动侦测功能图像抓拍数量过多造成用户查看数据不方便以及大大增加流量成本的现象,以及使用定时抓拍功能经常拍不到管理人员进门导致抓拍效果不佳的情况,提出并设计了一种基于门磁开关的图像抓拍装置,同时通过计算分析得出门扇开度为60.00°,支架尺寸为50.00 cm的最佳安装条件,最后通过现场测试证明该装置能够实现一次开门或关门仅抓拍一次图像,有效解决之前存在的问题,结构合理、成本低、安装方便、运行稳定,抓拍效果良好,能够很好地满足用户需求,在农村供水站的标准化建设和安全管理中具有推广价值。

关键词：农村供水站图像抓拍门磁开关安装支架标准化

Analysis of the anti-T2DM components in dichloromethane fraction of Schisandra sphenanthera and its mechanism

在线全文

学校读者我要写书评

暂无评论

Traditional Medicine Research 2025年第1期10卷 27-43页

作者： Shi-Bo Feng Hai-Hui Jiang Hui-li Kang Yi Jiang Hua-Wei Zhang Xiao-Mei song Yu-Ze li Wen-li Huang Dong-Dong Zhang Chong Deng School of Pharmacy Shaanxi University of Chinese MedicineXianyang 712046China School of Pharmacy and Shaanxi Qinling Application Development and Engineering Center of Chinese Herbal Medicine Shaanxi University of Chinese MedicineXianyang 712046China Key Laboratory for Research and Development of“Qin Medicine”of Shaanxi Administration of Traditional Chinese Medicine Xianyang 712046China Shaanxi Key Laboratory of Research and Application of“Taibai Qi Yao” Xianyang 712046China

Background:The type 2 diabetes mellitus(T2DM)pharmacodynamic study of various parts of Schisandra sphenanthera was conducted in the previous stage,and it was found that dichloromethane extracted part(SDP)had a significant hypoglycemic ***,the components of SDP were analyzed,and the specific mechanism of its anti-T2DM was ***:We used a high-fat,high-sugar diet in combination with streptozotocin to induce a T2DM rat model,and the model rats were divided into two groups according to body weight and blood ***,oral glucose tolerance test,fasting blood glucose,low density lipoprotein cholesterol,superoxide dismutase,insulin,glycated hemoglobin,total cholesterol,nonesterified free fatty acids,alanine aminotransferase,high-density lipoprotein cholesterol,aspartate aminotransferase,malondialdehyde,and glutathione peroxidase were measured,organ indices were calculated,and pathological sections of pancreas and liver were *** 16S rRNA V3–V4 region of intestinal flora was sequenced to explore the effect of SDP on biochemical indicators and intestinal *** on the above indicators,the anti-T2DM mechanism of SDP in Schisandra sphenanthera was ***:After six weeks of administration,the biochemical indices of diabetic rats were diminished compared to the control *** SDP could significantly increase the gut microbialα-diversity index,resulting in significant changes in the flora of T2DM rats,with increased richness and diversity,reduced harmful flora,and significantly back-regulated the levels of acetic acid,propionic acid,and butyric ***:SDP can improve the symptoms associated with elevated blood glucose,dyslipidemia,elevated fasting insulin levels,and damaged glucose tolerance in *** against T2DM may be through the control of intestinal flora to normalize and exert anti-diabetic effect;its main active components may be lignans and terpenoids.

关键词： Schisandra sphenanthera T2DM intestinal flora HPLC

High-precision magnetic field measurement system based on a coherent population trapping magnetometer onboard the SATech-01 satellite

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

Science China Technological Sciences 2025年

作者： Hongbo XUE Wei song Haoran ZHAO Yiteng ZHANG Shanzhi YE Jindong WANG Ran TAO Peng SANG Keli CHEN Xingzi BI Bingjun CHENG Bin ZHOU Yongliang XUE Yingying TANG liu liU Jinsong li Xiaocheng ZHU Baoquan li Jinguo liU Wen CHEN Xiaofeng ZHANG Yonghe ZHANG Lei li State Key Laboratory of Space Weather National Space Science Center Chinese Academy of Sciences Key Laboratory of Solar Activity and Space Weather National Space Science Center Chinese Academy of Sciences Key Laboratory of Electronics and Information Technology for Space Systems National Space Science Center Chinese Academy of Sciences State Key Laboratory of Robotics Shenyang Institute of Automation Chinese Academy of Sciences Innovation Academy for Microsatellites Chinese Academy of Sciences

On July 27, 2022, a high-precision system for measuring the magnetic field based on a coherent population trapping magnetometer（referred to as the CPT system） was launched onboard the Space Advanced Technology demonstration satellite（SATech-01） by a ZK-1A rocket. The payload comprises a scalar coherent population trapping magnetometer（CPTM）, triaxial anisotropic magnetoresistance magnetometer（AMRM）, and nano star tracker mounted on a non-magnetic telescopic tubular mast. This configuration enables synchronized measurement of scalar and vector geomagnetic fields, as well as the attitude,making the payload with its compact sensors suitable for applications on miniature satellite platforms. On November 7, 2022,the novel telescopic tubular mast was deployed in orbit, extending to a length of 5.28 m. The CPTM, an absolute scalar magnetometer with an omnidirectional sensor, is the first China-developed quantum/atomic magnetometer successfully operating in space. In orbit, the CPTM has sensitivity of ～10 pT/Hz1/2and can automatically operate under complex magnetic field variations. The difference between the scalar fields obtained using the CPTM and CHAOS model has a mean deviation of–3.73 n T and a standard deviation of 26.11 nT（1σ）, without on-orbit calibration or correction. The miniaturized AMRM has a sensitivity of ～0.3 n T/Hz1/2and maintains stable and reliable operation in orbit. The low-power and miniaturized nano star tracker has a measurement uncertainty of 14.23″（1σ） in orbit. The mission has realized the on-orbit technical verification of the integrated and synchronized detection of the vector magnetic field and attitude and fully validated the system's performance,automation level, and reliability.

关键词：

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

杭州湾滩涂资源遥感动态监测分析

浙江水利科技 2007年第1期35卷 11-17页

作者：宋立松王新向卫华周强浙江省水利河口研究院浙江杭州310020

采用遥感信息图谱的方法对杭州湾滩涂资源进行了分析研究,以遥感影像、统计资料为基础数据,在GIS技术支持下,探讨了钱塘江河口及杭州湾滩涂资源变化信息图谱,为探索研究区滩涂资源变化成因、过程、预测未来发展变化趋势及环境影响提供... 详细信息

采用遥感信息图谱的方法对杭州湾滩涂资源进行了分析研究,以遥感影像、统计资料为基础数据,在GIS技术支持下,探讨了钱塘江河口及杭州湾滩涂资源变化信息图谱,为探索研究区滩涂资源变化成因、过程、预测未来发展变化趋势及环境影响提供了科学依据。

关键词：杭州湾动态变化 RS 信息图谱

Electrodes for li-ion batteries: From high-voltage liCoO_(2) to Coreduced /Co-free layered oxides with potential anodes

在线全文

学校读者我要写书评

暂无评论

Nano Research 2023年第12期16卷 12983-13007页

作者： Luting song Weiguo Chu Nanofabrication Laboratory National Center for Nanoscience and TechnologyBeijing 100190China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

li-ion batteries(liBs)are one type of more and more widely used devices for energy storage and power supply in which cathode materials are playing a relatively more decisive role at current *** this review,we start with pioneeringly commercialized R¯3mliCoO_(2)(LCO)with a layered rhombohedral structure(space group)to discuss novel sequentially emerging LCO-derived layered oxides from the perspectives of both cobalt content reduction and performance *** is placed on the improvement of high-voltage performance of LCO and Co-reduced/free layered oxides,including Co-reduced high-nickel layered oxides,Co-free li-rich layered oxides,and Ni-based layered oxides cathodes,and their underlying mechanisms via different ***,possibly matched carbon and silicon-based anode materials are briefly *** common issues and prospects of the layered oxides cathodes and their potential anodes are summarized and commented *** review can help understand the emergence logics of novel layered oxides with gradually vanishing cobalt involved,provide insights about the underlying mechanisms of performance enhancement pertaining to particular strategies,and even inspire the discovery of novel cathode materials with high performance and low cost.

关键词： li-ion batteries cathodic materials anode materials high-voltage liCoO_(2) Co-reduced/free layered oxides

文学广告的场域竞合与再造——基于我国现当代文学广告演变的思考

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

新闻与传播评论 2025年第1期78卷 118-128页

作者：李雪枫宋宇航山西大学新闻学院山西太原030006

文学广告是文学作品推广与接受的重要手段之一,文学广告的运行机制是通过文学广告场域中“他律极”与“自主极”之间的竞合与再造完成的。研究对现当代文学广告场域的机制与作用进行了考察,在总结历史经验、观察现实媒介运行的基础上提... 详细信息

文学广告是文学作品推广与接受的重要手段之一,文学广告的运行机制是通过文学广告场域中“他律极”与“自主极”之间的竞合与再造完成的。研究对现当代文学广告场域的机制与作用进行了考察,在总结历史经验、观察现实媒介运行的基础上提出文学广告的传播新思路:借助媒介技术的创新再造文学广告场域———需要以整合传播的视角看待文学广告,以开放包容的心态去接纳电影、文学奖项、新书发售会、直播等新的传播中介,需要推动文学广告传播的定制化、差异化和分众化变革,需要实现文学创造力与市场化的平衡,以此激发广大读者阅读文学作品的热情。

关键词：文学广告场域竞合场域再造演变历程