检索结果-南通市图书馆

Transmissive-detected laser speckle contrast imaging for blood flow monitoring in thick tissue: from Monte Carlo simulation to experimental demonstration

引用

light(Science & Applications) 2021年第12期10卷 2492-2506页

作者： dong-yu li Qing Xia Ting-Ting yu Jing-Tan Zhu Dan Zhu Britton Chance Center for Biomedical Photonics Wuhan National Laboratory for OptoelectronicsHuazhong University of Science and Technology430074 WuhanHubeiChina MoE Key Laboratory for Biomedical Photonics Huazhong University of Science and Technology430074 WuhanHubeiChina

Laser speckle contrast imaging(LSCI)is a powerful tool to monitor blood flow distribution and has been widely used in studies of microcirculation,both for animal and clinical ***,LSCI usually works on reflectivedetected ***,it could provide promising temporal and spatial resolution for in vivo applications only with the assistance of various tissue windows,otherwise,the overlarge superficial static speckle would extremely limit its contrast and ***,we systematically investigated the capability of transmissive-detected LSCI(TR-LSCI)for blood flow monitoring in thick *** Monte Carlo simulation,we theoretically compared the performance of transmissive and reflective *** was found that the reflective-detected mode was better when the target layer was at the very surface,but the imaging quality would rapidly decrease with imaging depth,while the transmissivedetected mode could obtain a much stronger signal-to-background ratio(SBR)for thick *** further proved by tissue phantom,animal,and human experiments that in a certain thickness of tissue,TR-LSCI showed remarkably better performance for thick-tissue imaging,and the imaging quality would be further improved if the use of longer wavelengths of near-infrared ***,both theoretical and experimental results demonstrate that TR-LSCI is capable of obtaining thick-tissue blood flow information and holds great potential in the field of microcirculation research.

关键词： reflective thick speckle

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

Association between Helicobacter pylori infection and food-specific immunoglobulin G in Southwest China

引用

World Journal of Clinical Cases 2021年第32期9卷 9815-9824页

作者： Ying liu Ping Shuai yu-Ping liu dong-yu li Health Management Center Sichuan Provincial People’s HospitalUniversity of Electronic Science and Technology of ChinaChengdu 611731Sichuan ProvinceChina Health Management Center Chinese Academy of Sciences Sichuan Translational Medicine Research HospitalChengdu 610072Sichuan ProvinceChina

BACKGROUND Helicobacter pylori(***)has been found to be associated with extragastrointestinal diseases,possibly including adverse food reactions(such as food allergy or intolerance).However,there are few studies on *** and food allergy or intolerance,and the results are ***-specific immunoglobulin(Ig)G has been revealed to be associated with food allergy or intolerance and can be used as a marker to explore the correlation between *** infection and food allergy or *** To explore the relationship between *** infection and food-specific IgG METHODS We retrospectively analyzed the physical examination data of 21822 subjects from February 2014 to December 2018 in this *** infection was detected using the 13C urea breath ***-specific IgG of eggs,milk and wheat in serum was *** were grouped according to *** positivity,and the positive rates of three kinds of food-specific IgG were compared between the two *** logistic regression analysis was performed to elucidate the association between *** infection and food-specific *** The total infection rate of *** was 39.3%,and the total food-specific IgGpositive rates of eggs,milk and wheat were 25.2%,9.0%and 4.9%,*** infection rate of *** was higher in males than in females,while the positive rates of food-specific IgG were lower in males than in *** positive rates of food-specific IgG decreased with age in both males and *** the ***-positive groups,the positive rates of food-specific IgG of eggs,milk and wheat were all lower than those in the ***-negative *** logistic regression analysis revealed that *** infection was negatively correlated with the food-specific IgG-positive rates of eggs,milk and wheat(odds ratio value of eggs 0.844-0.873,milk 0.741-0.751 and wheat 0.755-0.788,in different models).CONCLUSION *** infection was found to be negati

关键词： Food-specific IgG Helicobacter pylori Adverse food reaction Food allergy Food intolerance Humoral immunity

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

Effect of Tetrabutylammonium Bromide on Enzymatic Polymerization of Phenol Catalyzed by Horseradish Peroxidase

引用

Chinese Journal of Polymer Science 2014年第7期32卷 906-913页

作者： Hua Duan Ke Zheng 崔元臣 yu-dong li Lei Zhang Key Laboratory of Ministry of Education for Special Functional Materials Henan University College of Chemistry and Chemical Engineering Henan University

In this article tetrabutylammonium bromide （TBAB） was first added in buffer to compose a convenient and environmentally friendly system, and enzymatic polymerization of phenol catalyzed by horseradish peroxidase （HRP） could proceed efficiently in this system. When TBAB was added, the most conversion of phenol could reach 99.1%. The phenol polymer was considered to consist of a mixture of phenylene （Ph） and oxyphenylene （Ox） units by IR analysis, and the ratio of phenylene to oxyphenylene units （Ph/Ox） was measured by titration. Moreover, the effects of the dosage of horseradish peroxidase （HRP） and pH value on the conversion of phenol were investigated. The reaction performed very effectively in this novel system when the addition of HRP was only 0.2 mg. In all cases, the weight-average molecular weight calculated by GPC-SLS was in a range from 12000 Da to 30000 Da. The phenol polymer prepared in the present research possessed good thermal stability shown by TG analysis.

关键词： Horseradish peroxidase Phenol Polymerization Tetrabutylammonium bromide.

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

Microstructure and mechanical properties of TiAl/Ni-based superalloy joints vacuum brazed with Ti-Zr-Fe-Cu-Ni-Co-Mo filler metal

引用

Rare Metals 2021年第8期40卷 2134-2142页

作者： Bao Wan Xiao-Qiang li Cun-liang Pan dong-yu li Sheng-Guan Qu Chao Yang National Engineering Research Center of Near-Net-Shape Forming for Metallic Materials South China University of TechnologyGuangzhou510640China

For the purpose of elevated temperature service and weight reduction in aerospace vehicle applications,a novel Ti-Zr-Fe-Cu-Ni-Co-Mo filler metal was employed to join TiAl to Ni-based superalloy(GH536).The effects of brazing temperature on interfacial microstructure and chemical composition of the joints were *** representative joint microstructure from TiAl substrate to GH536 substrate was primarily composed of four characteristic layers in order:B_(2);Al_(3)NiTi_(2);AlNi_(2)Ti containing Cr-rich(Cr,Ni,Fe)_(ss)(subscript ss represents solid solution),Ni-rich(Ni,Cr,Fe)_(ss) and TiNi3;Cr-rich(Cr,Ni,Fe)_(ss)containing AlNi_(2)Ti,Ni-rich(Ni,Cr,Fe)_(ss) and *** IV has the majority of the brazing seam,while LayerⅡwas the *** the thickness of LayerⅡwas not affected by brazing *** the increase in brazing temperature in the range of 1110-1170℃,both the shear strength and the thickness of brazing seam firstly increased and then *** joint performance was jointly controlled by the thickness of brazing seam,the amounts of microcracks and intermetallic compounds formed in brazing *** maximum shear strength of 183 MPa at room temperature was obtained together with a peak thickness when the joint was brazed at 1150℃for 10 min and the shear fracture mainly occurred in the thinnest LayerⅡAl_(3)NiTi_(2).

关键词： TiAl alloy Ni-based superalloy Brazing Microstructure Shear 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

X-ray irradiation-induced degradation in Hf_(0.5)Zr_(0.5)O_(2) fully depleted silicon-on-insulator n-type metal oxide semiconductor field-effect transistors

引用

Rare Metals 2021年第11期40卷 3299-3307页

作者： yu-dong li Qing-Zhu Zhang Fan-yu liu Zhao-Hao Zhang Feng-yuan Zhang Hong-Bin Zhao Bo li Jiang Yan Key Laboratory of Microelectronics Devices and Integrated Technology Integrated Circuit Advanced Process Center(ICAC)Institute of MicroelectronicsChinese Academy of SciencesBeijing 100029China University of Chinese Academy of Sciences Beijing 100049China State Key Laboratory of Advanced Materials for Smart Sensing GRINM Group Co.LtdBeijing 100088China Institute of Microelectronics Chinese Academy of SciencesBeijing 100029China School of Information Science and Technology North China University of TechnologyBeijing 100144China

The n-type ultrathin fully depleted silicon-on-insulator(FDSOI) metal-oxide-semiconductor field-effect transistors(MOSFETs),with a Hf_(0.5)Zr_(0.5)O_(2) high dielectric permittivity(high-k) dielectric as gate insulator,were *** total ionizing dose effects were investigated,and an X-ray radiation dose up to 1500 krad(Si) was applied for both long-and short-channel *** short-channel devices(0.025-0.100 μm) exhibited less irradiation sensitivity compared with the long-channel devices(0.35-16 μm),leading to a 71% reduction in the irradiation-induced drain current growth and a 26% decrease in the shift of the threshold *** was experimentally demonstrated that the OFF mode is the worst case among the three working conditions(OFF,ON and A110) for short-channel ***,the determined effective electron mobility was enhanced by 38% after X-ray irradiation,attributed to the different compensations for charges triggered by radiation between the highk dielectric and buried *** extracting the carrier mobility,gate length modulation,and source/drain(S/D)parasitic resistance,the degradation mechanism on X-ray irradiation was ***,the split capacitance-voltage measurements were used to validate the analysis.

关键词： Total ionizing dose Fully depleted silicon-on-insulator(FDSOI) Metal–oxide–semiconductor field-effect transistor(MOSFET) High-k Hf_(0.5)Zr_(0.5)O_(2)

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

Generation and detection of squeezed state

引用

Optoelectronics Letters 2008年第3期4卷 231-233页

作者： SHANG Xu-dong yu li FENG Xue-dong YANG Bo-jun Key Laboratory of Optical Communication and light wave Technologies Ministry of Education Beijing University ofPosts and Telecommunications Beijing 100876 China

Soliton amplitude squeezed state is obtained and dctected by using asymmetric Sagnac interferometer and balanced homodyne detecting system. An improved photo detector circuit for quantum state detection is introduced. The circuit has a bandwidth of 10MHz and the saturation power is about 19 mW. A maximum photocurrent noise reduction of 1.1 dB below the shot noise is achieved. Taking the detection efficiency into account,the squeezing will be about 1.5 dB.

关键词：压缩态检测技术孤波不对称性

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

Total ionizing dose and synergistic effects of magnetoresistive random-access memory

引用

Nuclear Science and Techniques 2018年第8期29卷 136-140页

作者： Xing-Yao Zhang Qi Guo yu-dong li lin Wen Key Laboratory of Functional Materials and Devices for Special Environments Xinjiang Technical Institute of Physics and ChemistryChinese Academy of SciencesUrtimqi 830011China Xinjiang Key Laboratory of Electronic Information Materialand Device Urumqi 830011China

A magnetoresistive random-access memory(MRAM) device was irradiated by ^(60) Co c-rays and an electron *** synergistic effect of this on the MRAM was tested with an additional magnetic field during irradiation,from which the total ionizing dose(TID) and the synergistic damage mechanism of MRAM were *** addition,DC,AC,and functional parameters of the memory were tested under irradiation and annealing via a very large-scale integrated circuit test *** radiation-sensitive parameters were obtained through analyzing the *** of the magnetic field applied on the MRAM while testing the synergistic effects,shallow trench isolation leakage and Frenkel–Poole emission due to synergistic effects were smaller than that of TID,and hence radiation damage of the synergistic effects was also lower.

关键词：随机存取剂量电离记忆集成电路测试 MRAM TID 存储器

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

Produced-water treatment: Application and research of combined fiber coalescence technique in offshore oilfield

引用

Petroleum Science 2023年第1期20卷 569-576页

作者： Pin-Yi Dai Yi-Qian liu Hao Lu yu-dong li Qiang Yang School of Mechanical and Power Engineering East China University of Science and TechnologyShanghai200237China

When the process of extraction of oil from an offshore oilfield enters the advanced stages,the water content in the extracted fluid can be above 90%.The water quality is complex with many types of pollutants and highly emulsified ***,a key consideration in the production process of offshore oilfields is the efficient and economical treatment of the oil-containing produced water to make it suitable for discharge and recover oil *** this study,we developed a hydrophilic and hydrophobic combined fiber coalescence separator with composite fiber shapes using fiber induction and X/*** separator is designed based on experimental observations of the mechanism of structure coalescence in the physical oil removal method.A pilot test was performed on an oil exploration platform in the Bohai *** the designed flow rate,the separator reduced the total concentration of petroleum in the produced water from 2000 to 3000 mg/L to below 60 mg/L,with an average oil removal efficiency of 98.24%.Furthermore,it effectively reduced the number of organic compounds present in the water from 120 to 17 and removed 70% of the *** test results show that the proposed device can be used fr produced-water treatment on offshore platforms.

关键词： Combined fiber coalescence Production water Oil-water separation X/U weaving

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

Generation of Four-Mode Cluster-Type Entangled Coherent States in Free-Traveling Optical Fields

引用

Communications in Theoretical Physics 2011年第3期55卷 426-430页

作者： HE Dai-Guo dong yu-li FANG Jian-Xing QIAN li HU Jie School of Physical Science and Technology Suzhou University Suzhou 215006 China

In this paper, we propose an optical scheme to generate four-mode cluster-type entangled coherent states （ECSs） in free traveling optical fields by using two single-photon sources, coherent state sources, beam splitters, pho- todetectors, cross-Kerr media, and phase shifters. And the success probability of the states preparation is calculated. At last we discuss the experimental feasibility of such proposal.

关键词： cluster states coherent states beam splitters cross-Kerr media

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

The Effect of the Relative Velocity on Traffic Flow

引用

Communications in Theoretical Physics 2002年第8期38卷 230-234页

作者： XUE yu dong li-yun yuAN Yi-Wu DAI Shi-Qiang Shanghai Institute of Applied Mathematics and Mechanics Shanghai University Shanghai 200072 China Department of Physics Guangxi University Nanning 530003 China Shanghai Institute of Applied Mathematics and Mechanics Shanghai University Shanghai 200072 China Shanghai Institute of Applied Mathematics and Mechanics Shanghai University Shanghai 200072 China Shanghai Institute of Applied Mathematics and Mechanics Shanghai University Shanghai 200072 China

The optimal velocity model of traffc is extended to take the relative velocity into account. The traffcbehavior is investigated numerically and analytically with this model. It is shown that the car interaction with therelative velocity can effect the stability of the traffic flow and raise critical density. The jamming transition between thefreely moving and jamming phases is investigated with the linear stability analysis and nonlinear perturbation *** traffic jam is described by the kink solution of the modified Korteweg-de Vries equation. The theoretical result isin good agreement with the simulation.

关键词： optimal velocity model, relative velocity, jamming transition, traffic flow

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

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：