检索结果-南通市图书馆

3D interlocked all-textile structured triboelectric pressure sensor for accurately measuring epidermal pulse waves in amphibious environments

引用

Nano Research 2024年第3期17卷 1923-1932页

作者： shaobo si Chenchen Sun Yufen Wu Jingjing Li Han Wang Yinggang Lin Jin Yang Zhong Lin Wang Department of Optoelectronic Engineering Key Laboratory of Optoelectronic Technology and Systems Ministry of EducationChongqing UniversityChongqing 400044China College of Physics and Electronic Engineering Chongqing Normal UniversityChongqing 401331China Beijing Institute of Nanoenergy and Nanosystems Chinese Academy of SciencesBeijing 100083China School of Materials Science and Engineering Georgia Institute of TechnologyAtlantaGA 30332USA

The performance degradation and even damage of the e-textiles caused by sweat,water,or submersion during all-weather health monitoring are the main reasons that e-textiles have not been commercialized and routinized so far.Herein,we developed an amphibious,high-performance,air-permeable,and comfortable all-textile triboelectric sensor for continuous and precise measurement of epidermal pulse waves during full-day activities.Based on the principle of preparing gas by acid-base neutralization reaction,a one-piece preparation process of amphibious conductive yarn(ACY)with densely porous structures is proposed.An innovative three-dimensional(3D)interlocking fabric knitted from ACYs(0.6 mm in diameter)and polytetrafluoroethylene yarns exhibit high sensitivity(0.433 V·kPa^(-1)),wide bandwidth(up to 10 Hz),and stability(>30,000 cycles).With these benefits,98.8%agreement was achieved between wrist pulse waves acquired by the sensor and a high-precision laser vibrometer.Furthermore,the polytetrafluoroethylene yarn with good compression resilience provides sufficient mechanical support for the contact separation of the ACYs.Meanwhile,the unique skeletonized design of the 3D interlocking structure can effectively relieve the water pressure on the sensor surface to obtain stable and accurate pulse waves(underwater depth of 5 cm).This achievement represents an important step in improving the practicality of e-textiles and early diagnosis of cardiovascular diseases.

关键词： triboelectric pressure sensor amphibious fabric interlocking fabric pulse wave measurement one-piece preparation method

来源：

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

Flexible triboelectric nanogenerator toward ultrahigh-frequency vibration sensing

引用

Nano Research 2022年第8期15卷 7484-7491页

作者： Zhiwei Lin Chenchen Sun Gaoqiang Zhang Endong Fan Zhihao Zhou Ziying Shen Jun Yang Mingyang Liu Yushu Xia shaobo si Jin Yang Key Laboratory of Optoelectronic Technology&Systems(Ministry of Education) Department of Optoelectronic EngineeringChongqing UniversityChongqing 400044China Chongqing Institute of Green and Intelligent Technology Chinese Academy of SciencesChongqing 400714China

Flexible high-frequency vibration sensors are highly desirable in various real-world applications such as structural health monitoring,environmental monitoring,and the internet of things.However,developing a facile and effective method to fabricate vibration sensors simultaneously featuring high vibration frequency response-ability and flexibility remains a grand challenge.Herein,we report a flexible ultrahigh-frequency triboelectric vibration sensor(UTVS)prepared by a layer-particle-layer structure.Owing to the flexibility of the materials(i.e.,polyethylene terephthalate membrane)and the ultrahigh-frequency vibration response-ability of internal microparticles,the flexible UTVS exhibits an enhanced working frequency range of 3–170 kHz,which is much broader than previously reported triboelectric vibration sensors.Moreover,the UTVS can work not only in a flat state but also in a bent state due to its flexibility and the unique layer-particle-layer structural design.The UTVS shows nanometer-level vibration response-ability,omnidirectional response,stability in the temperature range of 10–70°C,good frequency resolution of 0.01 kHz,and excellent performance in burst vibration detection(e.g.,pencil lead break events and impact events from falling steel balls).With a collection of compelling features,the device is successfully demonstrated in vibration monitoring of curved structures(e.g.,real-time water pipeline leak monitoring).Such a flexible ultrahigh-frequency triboelectric vibration sensor holds great potential in a wide range of practical applications,such as communication,health care,and infrastructure monitoring.

关键词： vibration sensing structural health monitoring flexible electronics self-powered sensor

来源：

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

High resolution and high signal-to-noise ratio imaging with nearfield high-order optical signals

引用

Nano Research 2022年第9期15卷 8345-8350页

作者： Fei Wang Shuming Yang shaobo Li Shuhao Zhao Biyao Cheng Chengsheng Xia State Key Laboratory for Manufacturing Systems Engineering International Joint Laboratory for Micro/Nano Manufacturing and Measurement TechnologiesXi’an Jiaotong UniversityXi’an 710049China School of Mechanical Engineering Xi’an Jiaotong UniversityXi’an 710049China

The properties of near-field optics have always been the focus of nano-measurement technology.The 11th order effective nearfield optical signal with an incident laser wavelength of 1,550 nm is obtained using a platinum-coated optical probe(Pt–si probe).The experimental results show that the local electric field intensity of the Pt–si probe is nearly 30 times higher than that of silicon probe(si probe).Therefore,the highest 7th order near-field optical imaging results are obtained with the Pt–si probe.Further,near-field optical imaging is performed on samples such as gold grids and carbon nanotubes using the Pt–si probe.The measurement results show that the high-order signal has the characteristics of less background,higher signal-to-noise ratio,and resolution up to 5.7 nm.

关键词： high-order optical signal local electric field enhancement high resolution optical probe

来源：

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

Clinical efficacy of transjugular intrahepatic portosystemic shunt created through left or right branches of the portal vein:A meta-analysis

引用

Journal of Interventional Medicine 2021年第4期4卷 190-196页

作者： shaobo Zhai Qi Cui Fang Dong Shiqi Wen Moubo si Quan Chen Gansu University of Chinese Medicine Lanzhou730000People's Republic of China Gansu Province People's Hospital Lanzhou730000People's Republic of China Key Laboratory of Molecular Diagnostics and Precision Medicine for Surgical Oncology in Gansu Province Gansu Provincial Hospital Lanzhou730000GansuPeople's Republic of China

Background and aim:Transjugular intrahepatic portosystemic shunt(TIPS)is a technique successfully used to treat portal hypertension and its complications.However,the choice of the branch,left(L)or right(R),of the portal vein resulting in a better outcome is still under debate.Therefore,this meta-analysis aims to evaluate which branch has a better curative effect on patients treated with TIPS.Methods:PubMed,EMBASE,Web of science,Cochrane Library databases,Wanfang database and CBM were used for our search in October 2019 and updated in June 2021.The following parameters were used in evaluation:overall mortality,hepatic encephalopathy,shunt dysfunction,variceal rebleeding and rate of postoperative ascites.Results:There were seven studies included.The sample size was 1940.A lower risk of mortality was observed in TIPS-L-treated patients compared with TIPS-R-treated ones(OR=0.65,95%CI=0.50-0.85,p=0.002).A lower risk of shunt dysfunction was observed in TIPS-L-treated patients compared with TIPS-R-treated ones(OR=0.53,95%CI=0.33-0.87,p=0.01).And the TIPS-L group had a significantly higher hepatic encephalopathy-free rate than the TIPS-R group(OR=0.59,95%CI=0.44-0.78,p=0.0002).However,the rate of rebleeding(OR=0.75,95%CI=0.55-1.03,p=0.07)and incidence of postoperative ascites(OR=1.14,95%CI=0.86-1.51,p=0.38)was not statistically significant between the two groups.Conclusions:Based on the currently available evidence,the technique of TIPS through the left branch of the portal vein can significantly reduce the occurrence of overall postoperative mortality,hepatic encephalopathy and shunt dysfunction.

关键词： Meta-analysis Transjugular intrahepatic portosystemic shunt Portal hypertension Overall mortality Hepatic encephalopathy Shunt dysfunction

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Comparative Study on Wire-Arc Additive Manufacturing and Conventional Casting of Al–si Alloys:Porosity,Microstructure and Mechanical Property

引用

Acta Metallurgica sinica(English Letters) 2022年第3期35卷 475-485页

作者： Yueling Guo Qifei Han Jinlong Hu Xinghai Yang Pengcheng Mao Junsheng Wang shaobo Sun Zhi He Jiping Lu Changmeng Liu School of Mechanical Engineering Beijing Institute of TechnologyBeijing 100081China School of Materials Science and Engineering Beijing Institute of TechnologyBeijing 100081China Center for Micro and Nano Technologies Beijing Institute of TechnologyBeijing 100081China Advanced Research Institute of Multidisciplinary Science Beijing Institute of TechnologyBeijing 100081China Beijing Hangxing Machinery Manufacturing Co. Ltd.Beijing 100013China

Here,we compare the porosity,microstructure and mechanical property of 4047 Al–si alloys prepared by wire-arc additive manufacturing(WAAM)and conventional casting.X-ray microscopy reveals that WAAM causes a higher volume fraction of gas pores in comparison with conventional casting.Effective refi nements ofα-Al dendrites,eutectic si particles and Ferich intermetallic compounds are achieved by WAAM,resulting from its rapid solidifi cation process.Both ultimate tensile strength(UTS,up to 205.6 MPa)and yield stress(YS,up to 98.0 MPa)are improved by WAAM at the expense of elongation after fracture.The mechanical property anisotropy between scanning direction and build direction is minimal for alloys via WAAM.Additional microstructure refi nement and strength enhancement are enabled by increasing the travel speed of welding torch from 300 to 420 mm/min.

关键词： Wire-arc additive manufacturing Al–si alloy Porosity Microstructure Strength

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Selective laser melting of Al–8.5Fe–1.3V–1.7si alloy: Investigation on the resultant microstructure and hardness

引用

Chinese Journal of Aeronautics 2015年第2期28卷 564-569页

作者： Zheng Lijing Liu Yingying Sun shaobo Zhang Hu School of Materials Science and Engineering Beihang University

This article presents the microstructure and hardness variation of an Al 8.5Fe-1.3V 1.7si （wt%, FVS0812） alloy after selective laser melting （SLM） modification. Three zones were distinguished across the melting pool of the SLM-processed FVS0812 alloy： the laser melted zone （LMZ）, the melting pool border, and the heat affected zone （HAZ） in the previously deposited area around the melting pool. Inside the LMZ, either an extremely fine cellular-dendritic structure or a mixture zone of the α-Al matrix and nanoscale Al12（Fe,V）3si particles appeared. With a decreased laser beam scanning speed, the cellular-dendritic structure zone within the LMZ shrank significantly while the mixture zone expanded. The α-Al and Al12（Fe,V）3si mixture zone was also observed in the HAZ, but another phase, submicron θ-Al13Fe4 particles with rectangular or hexagonal shapes, formed along the melting pool border. Microhardness tests indicated that the hardness of the SLM-processed FVS0812 samples far exceeded that of the as-cast FVS0812 alloy.

关键词： Al-Fe-V-si alloys Hardness Melting pool Microstructure Selective laser melting

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Spatial Structural Pattern and Vulnerability of China-Japan-Korea Shipping Network

引用

Chinese Geographical Science 2017年第5期27卷 697-708页

作者： GUO Jianke WANG shaobo WANG Dandan LIU Tianbao Center for Studies of Marine Economy and Sustainable Development Liaoning Normal University Institute of Finance and Economics Shanghai University of Finance and Economics

The economies of China-Japan-Korea(CJK) are complementary, with their proximity resulting in the three countries having a high degree of interdependence with respect to trade. Currently, trade among these countries relies mainly on port-centered shipping. The development of the shipping network is integral for in-depth integration of CJK trade. This paper analyzes the overall characteristics, centrality, spatial structure, and vulnerability of the CJK shipping network using the methods of complex network analysis, blocking flow theory, and interruption and deletion of hub ports. The main findings are as follows: 1) The CJK shipping network has a small average path length and clustering coefficient, and its degree distribution follows a power-law distribution, which make the network present obvious characteristics of a Barabási-Albert scale-free. 2) The characteristics of the multi-center point of the CJK shipping network can alleviate traffic pressure. At the same time, the network shows a clear hierarchy in the port transportation system, with cargo transport relying mainly on the ‘hub port-hub port' connection. 3) The CJK shipping network is relatively stable. Compared with ports in Japan and Korea, the main hub ports in China have a greater impact on the stability of the shipping network, in particular those ports of the central coastal region, including Shanghai, Ningbo, and Lianyungang.

关键词：网络分析方法空间结构模式航运韩国日本中国主枢纽港弱性

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

新时代背景下工匠精神研究述评

引用

西部经济管理论坛 2023年第6期34卷 79-89页

作者：牟绍波司红王鹏周凌西华大学管理学院四川成都610039

在“中国制造2025”和经济高质量发展的时代背景之下,弘扬和培育工匠精神对中国经济转型发展具有重大意义。鉴于此,文章运用文献计量与归纳相结合的方法,探究工匠精神研究现状,梳理工匠精神内涵、维度、影响因素、作用后果及培育策略。... 详细信息

在“中国制造2025”和经济高质量发展的时代背景之下,弘扬和培育工匠精神对中国经济转型发展具有重大意义。鉴于此,文章运用文献计量与归纳相结合的方法,探究工匠精神研究现状,梳理工匠精神内涵、维度、影响因素、作用后果及培育策略。研究发现:工匠精神具有丰富的时代内涵,其内涵和维度划分尚未形成一致观点;工匠精神受个体和组织因素的影响,同时也是个体成长和组织发展的重要推动力;培育工匠精神需要政府、社会、企业和学校共同发力。

关键词：工匠精神可视化分析影响因素作用后果培育策略

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

谈我国众筹融资风险管理——基于美国JOBS法案视角

引用

改革与战略 2015年第11期31卷 77-79,117页

作者：胡绍波司昀鑫武汉理工大学湖北武汉430070 武昌职业学院湖北武汉430202

众筹融资是借助互联网平台进行融资的一种创新性行为,为小微企业提供了一条重要的融资手段。众筹融资运作模式主要是项目展示和资金流动,风险主要体现在合法地位缺失的法律风险、网络环境加重的委托代理风险、技术和经营管理风险。文章... 详细信息

众筹融资是借助互联网平台进行融资的一种创新性行为,为小微企业提供了一条重要的融资手段。众筹融资运作模式主要是项目展示和资金流动,风险主要体现在合法地位缺失的法律风险、网络环境加重的委托代理风险、技术和经营管理风险。文章建议,通过确立众筹的法律地位和建立灵活的投资模式来化解众筹融资风险。

关键词：众筹融资 JOBS法案小微企业风险制度安排

来源：

维普期刊数据库

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

酶制剂+益生菌与植物提取物协同对肉鸡生产性能、免疫能力及抗氧化能力的影响

引用

中国粮油学报 2022年第12期37卷 198-202页

作者：刘沛尧张绍波李京都张李文高思陈慧君熊鹏齐智利华中农业大学动物科学技术学院武汉430070 武汉城市职业学院武汉430064 山东理工大学淄博255000

本实验旨在研究酶制剂+益生菌与植物提取物对肉鸡生产性能、免疫能力及抗氧化能力的影响。实验选取192只1日龄天露黑鸡2号,随机分为8组,每组4个重复,每个重复6只鸡,实验时间为21 d。对照组饲喂基础日粮,抗生素组饲喂基础日粮加250 g/t... 详细信息

本实验旨在研究酶制剂+益生菌与植物提取物对肉鸡生产性能、免疫能力及抗氧化能力的影响。实验选取192只1日龄天露黑鸡2号,随机分为8组,每组4个重复,每个重复6只鸡,实验时间为21 d。对照组饲喂基础日粮,抗生素组饲喂基础日粮加250 g/t的4%恩拉霉素,实验Ⅰ、Ⅱ、Ⅲ组分别饲喂基础日粮加100、300、500 g/t含有益生菌与酶制剂的添加剂A,实验组Ⅳ、Ⅴ、Ⅵ分别饲喂基础日粮加200、500、800 g/t含有益生菌、酶制剂与大蒜素的添加剂B。结果表明:添加剂A与添加剂B都能够提高肉鸡平均日增重。添加剂A与添加剂B都会显著降低血清中葡萄糖与尿素氮浓度(P<0.05),极显著降低总胆固醇、甘油三酯、免疫球蛋白、白细胞介素-10浓度(P<0.01),极显著增加白细胞介素1-β与肿瘤坏死因子-α浓度(P<0.01)。研究表明,适量添加添加剂A或添加剂B能够起到与抗生素相类似的作用,在一定程度上能够替代恩拉霉素。

关键词：非淀粉多糖酶制剂芽孢杆菌植物提取物肉鸡

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：