检索结果-南通市图书馆

孕妇血清HBV-DNA含量在母婴传播中的意义

在线全文

学校读者我要写书评

暂无评论

实用全科医学 2007年第5期5卷 395-396页

作者：马静隋景玉白宝敏王娟符丽华广东省中山市博爱医院感染科 528403

目的探讨孕妇血清不同HBV-DNA含量与母婴传播率之间的关系。方法用荧光定量PCR方法分别检测96对母婴血清HBV-DNA含量,根据孕妇血清不同HBV-DNA含量进行分组。结果随母血HBV-DNA含量上升,婴儿脐血HBV-DNA含量随之升高,且婴儿HBV感染率增... 详细信息

目的探讨孕妇血清不同HBV-DNA含量与母婴传播率之间的关系。方法用荧光定量PCR方法分别检测96对母婴血清HBV-DNA含量,根据孕妇血清不同HBV-DNA含量进行分组。结果随母血HBV-DNA含量上升,婴儿脐血HBV-DNA含量随之升高,且婴儿HBV感染率增加。结论HBV母婴传播率受孕妇HBV-DNA含量影响。

关键词： HBV—DNA 含量疾病传播

Cone-shaped cylindrical Ce_(0.9)Gd_(0.1)O_(1.95) electrolyte prepared by slip casting and its application to solid oxide fuel cells

在线全文

学校读者我要写书评

暂无评论

Journal of Rare Earths 2012年第1期30卷 53-56页

作者： sui jing DONG Lifeng LIU Jiang College of Materials Science and Engineering Qingdao University of Science and TechnologyQingdao 266042China School of Chemistry and Chemical Engi-neering South China University of TechnologyGuangzhou 510641China

A cone-shaped gadolinium doped ceria（Ce0.9Gd0.1O1.95,GDC） electrolyte cylinder with a thin wall was fabricated using slip cast-ing *** diameter of the larger open end of the cone-shaped cylinder was 0.85 cm,the length was 1.0 cm,and the thickness of the wall was 0.026 cm after *** the electrolyte and electrode powders were fabricated by using a glycine-nitrate process.A single solid oxide fuel cell（SOFC） was prepared with the cone-shaped electrolyte,NiO-GDC（70：30 wt.%） anode and Sm0.5Sr0.5CoO3（SSC） *** electrochemical performance（I-V curve） and electrochemical impedance spectroscopy（EIS） were studied with humidified hydrogen as the fuel and air as the *** maximum output power density was about 300 ？mW/cm2 at 700 *** EIS results showed that the dominant loss of the SOFC was from the ohmic resistance of the electrolyte.

关键词： slip casting GDC electrolyte solid oxide fuel cell rare earths

Experimental Investigation on an Absorption Heat Transformer for Production of Hot Water or Steam Generation

在线全文

学校读者我要写书评

暂无评论

Journal of Thermal Science 2021年第2期30卷 574-584页

作者： LIU Feng jing Yang LIU Taixiu sui Jun XU Yujie Institute of Engineering Thermophysics Chinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China Shandong Urban and Rural Planning Design Institute Jinan 250013China

The absorption heat transformer is widely used to utilize low-temperature waste heat in the field of distributed energy,industrial processing,and long-distance indoor heating,because it can upgrade energy level and deliver heat to heated *** this work,an experimental system of a vertical single-stage LiBr/H2O absorption heat transformer was established to study its performance in the case of producing high-temperature water or low-pressure steam generation under different heating water flow *** useful output heat,coefficient of performance,exergy coefficient of performance,and gross temperature lift of the single-stage heat transformer have all been *** results show that the absorber cannot directly generate low-pressure steam under the condition of counter-flow heat exchange but can obtain more useful output *** largest useful output heat is 20.3 kW,which is higher than that in the case of parallel-flow heat *** generation of low-pressure steam has certain requirements on the mode of heat *** largest internal gross temperature lift of 28.1℃corresponds to the smallest coefficient of performance of 0.22 when the heating water flow rate is 2.1 m3/*** performance of the single-stage absorption heat transformer can be improved to some extent by increasing the heating water flow rate.

关键词： vertical falling film absorber counter flow and parallel flow high-temperature water low-pressure steam exergy coefficient of performance

Optimal Control of Oxygen Concentration in a Magnetic Czochralski Crystal Growth by Response Surface Methodology

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2006年第2期22卷 173-178页

作者： Huiping YU Yunkan sui jing WANG Fengyi ZHANG Xiaolin DAI Numerical Simulation Center of Engineering Beijing University of Technology Beijing 100022 China General Research Institute for Nonferrous Metals Beijing 100088 China

Concepts and techniques of response surface methodology have been widely applied in many branches of engineering, especially in the chemical and manufacturing areas. This paper presents an application of the methodology in a magnetic crystal Czochralski growth system for single crystal silicon to optimize the oxygen concentration at the crystal growth interface in a cusp magnetic field. The simulation demonstrates that the response surface methodology is a feasible algorithm for the optimization of the Czochralski crystal growth process.

关键词： Czochralski Magnetic field Optimization Response surface methodology

Martingale method for optimal investment and proportional reinsurance

在线全文

学校读者我要写书评

暂无评论

Applied Mathematics(A Journal of Chinese Universities) 2021年第1期36卷 16-30页

作者： LIU Shuang-sui GUO Wen-jing TONG Xin-le School of Finance Nanjing University of Finance and EconomicsNanjing 210023China.

Numerous researchers have applied the martingale approach for models driven by L¶evy processes to study optimal investment *** paper considers an insurer who wants to maximize the expected utility of terminal wealth by selecting optimal investment and proportional reinsurance *** insurer's risk process is modeled by a L¶evy process and the capital can be invested in a security market described by the standard Black-Scholes *** the martingale approach,the closed-form solutions to the problems of expected utility maximization are *** examples are presented to show the impact of model parameters on the optimal strategies.

关键词： martingale method proportional reinsurance investment exponential utility quadratic utility.

Dietary saturated fatty acid and polyunsaturated fatty acid oppositely affect hepatic NOD-like receptor protein 3 inflammasome through regulating nuclear factor-kappa B activation

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2016年第8期22卷 2533-2544页

作者： Yong-heng sui Wen-jing Luo Qin-Yu Xu jing hua Division of Gastroenterology and Hepatology Ren Ji Hospital School of Medicine Shanghai Jiao Tong University Shanghai Institute of Digestive Disease

AIM: To investigate the effect of different dietary fatty acids on hepatic inflammasome ***: Wild-type C57BL/6 mice were fed either a high-fat diet or polyunsaturated fatty acid (PUFA)-enriched diet. Primary hepatocytes were treated with either saturated fatty acids (SFAs) or PUFAs as well as combined with lipopolysaccharide (LPS). The expression of NOD-like receptor protein 3 (NLRP3) inflammasome, peroxisome proliferator-activated receptor-γ and nuclear factor-kappa B (NF-κB) was determined by real-time PCR and Western blot. The activity of Caspase-1 and interleukine-1β production were ***: High-fat diet-induced hepatic steatosis was sufficient to induce and activate hepatic NLRP3 inflammasome. SFA palmitic acid (PA) directly activated NLRP3 inflammasome and increased sensitization to LPS-induced inflammasome activation in hepatocytes. In contrast, PUFA docosahexaenoic acid (DHA) had the potential to inhibit NLRP3 inflammasome expression in hepatocytes and partly abolished LPS-induced NLRP3 inflammasome activation. Furthermore, a high-fat diet increased but PUFA-enriched diet decreased sensitization to LPS-induced hepatic NLRP3 inflammasome activation in vivo. Moreover, PA increased but DHA decreased phosphorylated NF-κB p65 protein expression in ***: Hepatic NLRP3 inflammasome activation played an important role in the development of non-alcoholic fatty liver disease. Dietary SFAs and PUFAs oppositely regulated the activity of NLRP3 inflammasome through direct activation or inhibition of NF-κB.

关键词： Non-alcoholic fatty liver disease NOD-like receptor protein 3 inflammasome Saturated fatty acids Polyunsaturated fatty acids Nuclear factor-kappa B

Biological Subtypes Bridge Diagnoses and Biomarkers:A Novel Research Track for Mental Disorders

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

Neuroscience Bulletin 2017年第3期33卷 351-353页

作者： Ming Song Zhengyi Yang jing sui Tianzi Jiang Brainnetome Center Institute of AutomationThe Chinese Academy of SciencesBeijing 100190China National Laboratory of Pattern Recognition Institute of AutomationChinese Academy of SciencesBeijing 100190China Queensland Brain Institute The University of QueenslandBrisbaneQLD 4072Australia Key Laboratory for Neuroinformation of Ministry of Education School of Life Science and TechnologyUniversity of Electronic Science and Technology of ChinaChengdu 610054China CAS Center for Excellence in Brain Science and Intelligence Technology Chinese Academy of SciencesShanghai 200031China

Neuroimaging has shown promise for diagnosing depression,but these diagnostic systems have not performed as well when tested in large multi-site ***,a paper published in Nature Medicine[1]has made major progress and provided good cues about how to understand mental disorders,not limited to *** is well known that mental disorders are associated with numerous personal and societal costs.

关键词： numerous promise psychiatric diagnostic subgroups biologically Nature psychological transcranial motivation

A Bioinspired Adhesive Sucker with Both Suction and Adhesion Mechanisms for Three-Dimensional Surfaces

在线全文

学校读者我要写书评

暂无评论

Journal of Bionic Engineering 2022年第6期19卷 1671-1683页

作者： jing Li Zhenzhen Song Chuandong Ma Tonghang sui Peng Yi Jianlin Liu College of Mechanical and Electrical Engineering China University of Petroleum(East China)Qingdao266580China College of Pipeline and Civil Engineering China University of Petroleum(East China)Qingdao266580China

There are significant advantages to investigate underwater attachments,which would be valuable in providing inspirations and design strategies for multi-functional surfaces and underwater ***,an abalone-inspired sucker integrating an elastic body and a membrane structure is proposed and fabricated filled with rigid quartz particles to adjust the backing stiffness of the contact like *** membrane is used to conform and contact surfaces well,the center area of which can be pulled in exposed to a negative pressure differential,to create a suction *** pulling experiments indicate that the sucker can adhere to three-dimensional surfaces with both suction and adhesion mechanisms in both dry and liquid *** switching between soft/hard contact states leads to the change of adhesive strength over 30 ***,we provide theoretical analysis on how the sucker work well in both dry and liquid ***,the developed sucker can easily lift up smooth planar objects and 3D objects,and can grip objects both smaller and larger than the size of the sucker,which have a difficulty for conventional suckers or friction-based *** potential application of the sucker in flexible transfer robot is demonstrated on various surfaces and environments,paving the way for further bio-inspired adhesive designs for both dry and wet scenarios.

关键词： Adhesion Sucker Abalone Suction Jamming Bioinspired

Microstructure and room-temperature tensile property of Ti-5.7Al-4.0Sn-3.5Zr-0.4Mo-0.4Si-0.4Nb-1.0Ta-0.05C with near equiaxed β grain fabricated by laser directed energy deposition technique

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

Journal of Materials Science & Technology 2022年第6期101卷 308-320页

作者： MengCheng Deng Shang sui Bo Yao Liang Ma Xin Lin jing Chen State Key Laboratory of Solidification Processing Northwestern Polytechnical UniversityXi’an 710072China Key Laboratory of Metal High Performance Additive Manufacturing and Innovative Design MIIT ChinaNorthwestern Polytechnical UniversityXi’an 710072China

Near-equiaxed β grain was achieved in the near-α Ti60(Ti-5.7Al-4.0Sn-3.5Zr-0.4Mo-0.4Si-0.4Nb-1.0Ta-0.05C) titanium alloy via laser directed energy deposition(LDED). The microstructural evolution along the building direction and the room-temperature tensile properties along the horizontal and vertical directions(building direction) were systematically studied through SEM and OM. EBSD and XRD were utilized to accurately demonstrate the texture of the α and β phases. The results showed that the α phase presented a low texture intensity, which was ascribed to the weak textured β grain with near-equiaxed morphology, since there are Burgers orientation relationships during the β →α transition. In addition, numerical simulation, combined with the CET curve of Ti60 alloy considering the effect of multi-composition,was utilized to elucidate the formation mechanism of the near-equiaxed β grains. Furthermore, according to the solidification theory, we proposed that the solidification temperature range ΔTfwas more accurate than the growth restriction factor Q in predicting the formation tendency of equiaxed β grain in different titanium alloys. Tensile results showed that the horizontal and vertical samples had similar strength,while the former exhibited larger elongation than the latter. The effect of the near-equiaxed β grain and the internal α phase on mechanical properties were revealed at last.

关键词： Laser directed energy deposition Near-αtitanium alloy Equiaxedβgrain Room-temperature tensile property