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Experimental investigation on single person's jumping load model

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Earthquake Engineering and Engineering Vibration 2015年第4期14卷 703-714页

作者： Chen jun Wang Haoqi Wang ling State Key Laboratory of Disaster Reduction in Civil Engineering Tongji University Tongji Architecture Design (Group) Co.Ltd.

This paper presents a modified half-sine-squared load model of the jumping impulses for a single person. The model is based on a database of 22,921 experimentally measured single jumping load cycles from 100 test subjects. Threedimensional motion capture technology in conjunction with force plates was employed in the experiment to record jumping loads. The variation range and probability distribution of the controlling parameters for the load model such as the impact factor, jumping frequency and contact ratio, are discussed using the experimental data. Correlation relationships between the three parameters are investigated. The contact ratio and jumping frequency are identified as independent model parameters, and an empirical frequency-dependent function is derived for the impact factor. The feasibility of the proposed load model is established by comparing the simulated load curves with measured ones, and by comparing the acceleration responses of a single-degree-of-freedom system to the simulated and measured jumping loads. The results show that a realistic individual jumping load can be generated by the proposed method. This can then be used to assess the dynamic response of assembly structures.

关键词： jumping loads three dimensional motion capture technology half-sine-squared model contact ratio impact factor

Prediction and Experimental Validation of Forming Limit Curve of a Quenched and Partitioned Steel

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Journal of Iron and Steel Research International 2016年第6期23卷 580-585页

作者： Xue-li GAO jun-ying MIN ling ZHANG Quan-chao LI chang-wei LIAN Jian-ping LIN School of Mechanical Engineering Tongji University Shanghai 201804 China Chair of Production Systems Ruhr-University Bochum Bochum 44801 Germany State Key Laboratory of Development and Application Technology of Automotive Steels (Baosteel) Shanghai 201900 China

Forming limit curve（FLC）is an effective tool to evaluate the formability of sheet *** accurate FLC prediction for a sheet metal is beneficial to its engineering application.A quenched and partitioned steel,known as QP980,is one of the 3rd generation advanced high strength steels and is composed of martensite,ferrite and a considerable amount of retained austenite（RA）.Martensite transformation from RA induced by deformation,namely,transformation induced plasticity（TRIP）,promotes the capability of work hardening and consequently *** tests were carried out to obtain the experimental forming limit strains with the aid of digital image correlation *** electron microscopy（SEM）was employed to examine the fracture morphologies of Nakazima specimens of the QP980 *** observed dimple pattern indicated that tensile stress was the predominant factor which led to failure of QP980 ***,maximum tensile stress criterion（MTSC）was adopted as the forming limit *** predict the FLC of QP980 steel,Von-Mises yield criterion and power hardening law were adopted according to the tested mechanical properties of QP980 *** were compared with those derived from other three representative instability theories,*** criterion,Storen-Rice vertex theory and Bressan-Williams model,which shows that the MTSC based FLC is in better agreement with the experimental results.

关键词： criterion tensile martensite hardening plasticity TRIP austenite steels ferrite quenched

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竹炭基高比表面积活性炭电极材料的研究

炭素技术 2003年第5期22卷 1-7页

作者：刘洪波常俊玲张红波何月德湖南大学材料科学与工程学院湖南长沙410082

以竹节为原料,在隔绝空气的条件下,经不同温度炭化处理后与KOH混合,制取竹炭基高比表面积活性炭。考察了炭化温度、KOH与竹炭的质量比、活化温度和活化时间等工艺因素对活性炭收率、微孔结构和吸附性能的影响,探讨了竹炭基高比表面积活... 详细信息

以竹节为原料,在隔绝空气的条件下,经不同温度炭化处理后与KOH混合,制取竹炭基高比表面积活性炭。考察了炭化温度、KOH与竹炭的质量比、活化温度和活化时间等工艺因素对活性炭收率、微孔结构和吸附性能的影响,探讨了竹炭基高比表面积活性炭作双电层电容器电极时的充放电特性及其比电容与各种因素的关系。研究结果表明,控制适宜的炭化、活化工艺条件可制得双电极比电容达55F/g的竹炭基高比表面积活性炭,由它组装的双电层电容器具有良好的充放电性能和循环性能,但内阻过高,大电流下充放电时电容量下降过大。

关键词：竹炭高比表面积活性炭双电层电容器比电容充放电特性

CdS/SiO_2 nanowire arrays and CdS nanobelt synthesized by thermal evaporation

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2006年第11期7卷 1956-1960页

作者： YU ling-min ZHU chang-chun FAN Xin-hui QI Li-jun YAN Wen School of Materials and Chemical Engineering Xi ＇an Institute of Technology Xi ＇an 710032 China School of Electronic and Information Engineering Xi ＇an Jiaotong University Xi ＇an 710049 China

CdS/SiO2 nanowire arrays and CdS nanobelts were synthesized by thermal evaporation of CdS and CdO mixture powders, with highly selective etching occurring on the silicon substrate surfaces. Study of the growth mechanism of CdS/SiO2 nanowire arrays and the growth process of CdS nanobelts showed that the growth of CdS dendrites plays an important role in the formation of CdS/SiO2 nanowire arrays, and that the mechanism of CdS/SiO2 nanowire arrays growth was in good agreement with “self-assembling nanoelectrochemistry”. In the thermal evaporation process, an interaction between Si from silicon substrate and Cd took place.

关键词： CdS/SiO2 nanowire arrays CdS nanobelts CdS dendrites Self-assembling nanoelectrochemistry

Detecting nanoparticles by“listening”

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Frontiers of physics 2023年第5期18卷 113-131页

作者： Haonan chang jun Zhang State Key Laboratory of Superlattices and Microstructures Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

In the macroscopic world,we can obtain some important information through the vibration of objects,that is,listening to the ***,we can also get some information of the nanoparticles that we want to know by the means of“listening”in the microscopic *** this review,we will introduce two sensing methods(cavity optomechanical sensing and surface-enhanced Raman scattering sensing)which can be used to detect the *** cavity optomechanical systems are mainly used to detect sub-gigahertz nanoparticle or cavity vibrations,while surface-enhanced Raman scattering is a well-known technique to detect molecular vibrations whose frequency generally exceeds ***,the vibrational information of nanoparticles from low-frequency to high-frequency could be obtained by these two *** size of the viruses is at the nanoscale and we can regard it as a kind of *** and ultrasensitive detection of the viruses is the key strategies to break the spread of the viruses in the *** optomechanical sensing enables rapid,ultrasensitive detection of nanoparticles through the interaction of light and mechanical oscillators and surface-enhanced Raman scattering is an attractive qualitatively analytical technique for chemical sensing and biomedical applications,which has been used to detect the SARS-CoV-2 ***,investigation in these two fields is of vital importance in preventing the spread of the virus from affecting human’s life and health.

关键词： ultrasensitive sensing cavity optomechanics surface-enhanced Raman scattering

漯河市某医院2018—2020年肺炎链球菌分布及药物敏感性监测

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国外医药（抗生素分册） 2022年第2期43卷 141-145页

作者：李宁马琼张琦常军玲王俊红孟艳平寇曦曦朱俊民李轶曹兴华漯河市中心医院河南漯河462000 河南省人民医院郑州450003

目的了解漯河市中心医院2018—2020年临床分离肺炎链球菌分布特点及耐药情况,为当地临床经验用药提供依据。方法收集2018—2020年临床分离的非重复肺炎链球菌菌株,采用VITEK 2-Compact细菌自动鉴定仪和E试验条进行药物敏感性试验,按美... 详细信息

目的了解漯河市中心医院2018—2020年临床分离肺炎链球菌分布特点及耐药情况,为当地临床经验用药提供依据。方法收集2018—2020年临床分离的非重复肺炎链球菌菌株,采用VITEK 2-Compact细菌自动鉴定仪和E试验条进行药物敏感性试验,按美国临床和实验室标准化协会(CLSI)2020年版标准判读结果。采用WHONET 5.6及SPSS26.0软件进行数据统计分析。结果共分离肺炎链球菌1588株,主要来源于痰液、全血、脑脊液(97.6%、1.5%、0.3%);幼儿占比83.3%(呈逐年递减趋势,P<0.001)、儿童占比10.9%,成人占比5.9%(逐年递增P<0.001);儿科和呼吸科占比分别呈逐年递减(P<0.001)和递增(P=0.003)趋势。四环素、复方磺胺甲恶唑、红霉素敏感率低(0.5%~14.7%);三代头孢菌素类敏感率呈下降趋势(98.9%~95.6%,P=0.001);氯霉素、左氧氟沙星敏感率较高(89.7%~99.5%);未检出耐青霉素、万古霉素、利奈唑胺的肺炎链球菌。痰液来源肺炎链球菌的复方磺胺甲恶唑敏感率低于血液来源(P=0.026);不同年龄组间左氧氟沙星和氯霉素敏感率呈下降趋势(P<0.001和P=0.036),四环素敏感率呈上升趋势(P=0.034)。结论肺炎链球菌在成年患者及呼吸科的检出率逐年增加,对三代头孢菌素类敏感率有逐年下降趋势,痰液分离菌株对复方磺胺甲恶唑的敏感率低于血液分离菌株,左氧氟沙星与氯霉素敏感率随年龄呈下降趋势、四环素敏感率随年龄呈上升趋势。

关键词：肺炎链球菌儿童耐药性分析

An investigation of changes in water quality throughout the drinking water production/distribution chain using toxicological and fluorescence analyses

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Journal of Environmental Sciences 2020年第1期32卷 310-318页

作者： Xue Han Xin Ji Xuan Ma jun-ling Liu Zhen-Yu He Wei chang Fei Tang Ai-Lin Liu Key Laboratory of Environment and Health Ministry of Education&Ministry of Environmental Protectionand State Key Laboratory of Environmental Health(Incubating)School of Public HealthTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China Wuhan Center for Disease Control and Prevention Wuhan 430015China School of Public Health Wuhan University of Science and TechnologyWuhan 430030China

changes in water quality from source water to finished water and tap water at two conventional drinking water treatment plants(DWTPs)were *** the routine water quality testing,Caenorhabditis elegans-based toxicity assays and the fluorescence excitation–emission matrices technique were also *** DWTPs supplied drinking water that met government *** current test conditions,both the investigated finished water and tap water samples exhibited stronger lethal,genotoxic and reprotoxic potential than the relative source water sample,and the tap water sample was more lethal but tended to be less genotoxic than the corresponding finished water ***,the nearly complete removal of tryptophan-like substances and newly generated tyrosine-like substances were observed after the treatment of drinking water,and humic-like substances were identified in the tap *** on these findings,toxic pollutants,including genotoxic/reproductive toxicants,are produced in the drinking water treatment and/or distribution ***,further studies are needed to clarify the potentially important roles of tyrosine-like and humic-like substances in mediating drinking water toxicity and to identify the potential sources of these ***,tryptophan-like fluorescence may be adopted as a useful parameter to monitor the treatment performance of *** observations provided insights into the importance of utilizing biotoxicity assays and fluorescence spectroscopy as tools to complement the routine evaluation of drinking water.

关键词： Bioassay C.elegans EEM Water treatment Distribution system

Esophageal perforation caused by fish vertebra ingestion in a seven-month-old infant demanded surgical intervention: A case report

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World Journal of Gastroenterology 2006年第44期12卷 7213-7215页

作者： Ming-Yu chang Ming-ling chang chang-Teng Wu Division of Pediatric Critical Care and Emergency Medicine Chang Gung Children's Hospital Taoyuan Taiwan 333 China Department of Hepatogastroenterology Chang Gung Memorial Hospital Taoyuan Taiwan 333 China Division of Pediatric Critical Care and Emergency Medicine Chang Gung Children's Hospital Taoyuan Taiwan 333 chang Gung University Taoyuan Taiwan 333 China

A seven-month-old infant was admitted to our hospital with a 1-wk history of shortness of breath, dysphagia, and fever. Diagnosis of esophageal perforation follow- ing fish vertebra ingestion was made by history review, pneumomediastinum and an irregular hyperdense lesion noted in initial chest radiogram. Neck computed tomo- graphy (CT) confirmed that the foreign body located at the cricopharyngeal level and a small esophageal tra- cheal fistula was shown by esophagogram. The initial re- sponse to treatment of fish bone removal guided by pan- endoscopy and antibiotics administration was poor since pneumothorax plus empyema developed. Fortunately, the patient’s condition finally improved after decortica- tion, mediastinotomy and perforated esophagus repair. To our knowledge, this is the first case report of esopha- geal perforation due to fish bone ingestion in infancy. In addition to particular caution that has to be taken when feeding the innocent, young victim, it may indicate the importance of surgical intervention for complicated esophageal perforation in infancy.

关键词： Fish bone Esophageal perforation Mediastinitis Decortication Mediastinotomy

Intent-Slot Correlation Modeling for Joint Intent Prediction and Slot Filling

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Journal of Computer Science & Technology 2022年第2期37卷 309-319页

作者： jun-Feng Fan Mei-ling Wang chang-Liang Li Zi-Qiang Zhu Lu Mao AI Laboratory KingSoft CorporationBeijing 100190China

Slot filling and intent prediction are basic tasks in capturing semantic frame of human *** and intent have strong correlation for semantic frame *** each utterance,a specific intent type is generally determined with the indication information of words having slot tags(called as slot words),and in reverse the intent type decides that words of certain categories should be used to fill as ***,the Intent-Slot correlation is rarely modeled explicitly in existing studies,and hence may be not fully *** this paper,we model Intent-Slot correlation explicitly and propose a new framework for joint intent prediction and slot ***,we explore the effects of slot words on intent by differentiating them from the other words,and we recognize slot words by solving a sequence labeling task with the bi-directional long short-term memory(BiLSTM)***,slot recognition information is introduced into attention-based intent prediction and slot filling to improve semantic *** addition,we integrate the Slot-Gated mechanism into slot filling to model dependency of slots on ***,we obtain slot recognition,intent prediction and slot filling by training with joint *** results on the benchmark Air-line Travel Information System(ATIS)and Snips datasets show that our Intent-Slot correlation model achieves state-of-the-art semantic frame performance with a lightweight structure.

关键词： spoken language understanding slot filling intent prediction Intent-Slot correlation slot recognition