检索结果-南通市图书馆

Inter-Cell Interference Cancellation Algorithm for Reverse Link TDD-CDMA Systems

在线全文

学校读者我要写书评

暂无评论

The Journal of China Universities of Posts and Telecommunications 2006年第1期13卷 84-87,92页

作者： SUN guang-yong yan Fa-jun WANG Wen-bo Wireless Signal Processing and Networks Laboratory Beijing University of Posts and Telecommunications Beijing 100876 P.R. China

This paper proposes a new inter-cell interference cancellation algorithm called subspace projection in order to eliminate the stronger inter-cell interference. This algorithm is designed for the reverse link of time division duplex-code division multiple access systems. The algorithm works by projecting desired users＇ signal vector onto the subspace orthogonal to the subspace that inferrers the users＇ signal. Link-level simulation results show that the scheme eliminates the inter-cell interference efficiently, improves the receiver performance, and increases the system capacity.

关键词： TDD-CDMA subspace projection inter-cell interference cancellation reverse link

Fabrication of porous graphitic carbon nitride-titanium dioxide heterojunctions with enhanced photo-energy conversion activity

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2017年第6期28卷 1312-1317页

作者： yan-Fei Shen Cheng Zhang Chun-guang yan Hui-Qin Chen Yuan-Jian Zhang Medical School Southeast University Nanjing 210009 China School of Chemistry and Chemical Engineering Southeast University Nonjing 210098 China Department of Electronic Engineering Southeast University Chengxian Colleage Nanjing 210088 China

Porous graphite-phase polymeric carbon nitride（GPPCN）/TiO2 donor-acceptor heterojunction was facilely fabricated through the combination of a template technique with a co-calcination process,which exhibited much higher photoelectric activity compared to pristine carbon nitride and *** precursor of porous GPPCN（pGPPCN）,porous melem,was prepared by using a green template,calcium carbonate,which could be easily removed by diluted *** pGPPCN/TiO2 heterojunction was then obtained by the assembly and subsequent co-calcination of TiO2 nanoparticles with porous *** formation of pGPPCN/TiO2 donor-acceptor heterojunction prepared by this method showed improved surface area and light ***,the composite presented much higher photo-energy conversion activity than those of GPPCN,pGPPCN and TiO2,which could be mainly ascribed to the high charge carrier separation *** study provides a new approach for the design and development of various photocatalysts with high efficiency for applications in energy fields.

关键词： Carbon nitride TiO2 Semiconductor Photoelectrochemistry 7Heterojunction

Preparation and characterization of gadolinium hydroxide single-crystalline nanorods by a hydrothermal process

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2007年第4期18卷 491-494页

作者： Yi Dong Yin guang yan Hong Bai Fu Xin School of Chemistry ＆ Materials Science Heilongjiang University Harbin 150080 China Key Laboratory of Rare Earth Chemistry and Physics Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 China

The Gd（OH）3 nanorods with diameters of ca. 40--60 nm and lengths of more than 400-550 nm have been prepared by a novel hydrothermal technique. The structural features and chemical composition of the nanorods were investigated by X-ray diffraction （XILD）, transmission electron microscopy （TEM）, and field emission scanning electron microscope （FESEM）, selected area electron diffraction （SAED）, and high resolution transmission electron microscopy （HRTEM）. The possible mechanism for the formation of Gd（OH）3 nanorods was proposed.

关键词： Gd(OH)3 Nanorods Hydrothermal method Lanthanide

A Facile Approach to Regioselective 1-O-Deacylation of Peracylated Glycopyranoses

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2003年第3期14卷 233-234页

作者： Jia Qiang DONG Shu Jia ZHANG yan guang WANG Department of Chemistry Zhejiang UniversityHangzhou 310027

The regioselective 1-O-deacylation of peracylated glycopyranoses 1a-d with zinc chloride and zinc oxide in THF/MeOH gave the corresponding tetra-O-acylglycopyranoses 2a-d in good yields.

关键词： Hydroxy sugars oligosaccaride zinc chloride.

Emerging novel targets for nonalcoholic fatty liver disease treatment: Evidence from recent basic studies

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2023年第1期29卷 75-95页

作者： guang-yan Wang Xiao-yan Zhang Chun-Jiong Wang You-Fei Guan Department of Physiology and Pathophysiology Tianjin Medical UniversityTianjin 300070China The Province and Ministry Co-sponsored Collaborative Innovation Center for Medical Epigenetics Tianjin 300070China NHC Key Laboratory of Hormones and Development Chu Hsien-I Memorial Hospital and Tianjin Institute of EndocrinologyTianjin 300070China Health Science Center East China Normal UniversityShanghai 200241China Advanced Institute for Medical Sciences Dalian Medical UniversityDalian 116044Liaoning ProvinceChina Department of Physiology and Pathophysiology School of Basic Medical SciencesDalian Medical UniversityDalian 116044Liaoning ProvinceChina Dalian Key Laboratory for Nuclear Receptors in Major Metabolic Diseases Dalian 116044Liaoning ProvinceChina

Nonalcoholic fatty liver disease(NAFLD),a leading chronic disease worldwide,affects approximately a quarter of the global *** steatohepatitis(NASH)is an advanced form of NAFLD and is more likely to progress to liver fibrosis than simple *** is also identified as the most rapidly growing cause of hepatocellular *** in the past decade,several phase II/III clinical trials have shown promising results in the use of novel drugs targeting lipid synthase,farnesoid X receptor signaling,peroxisome proliferatoractivated receptor signaling,hepatocellular injury,and inflammatory signaling,proven pharmaceutical agents to treat NASH are still ***,continuous exploration of the mechanism underlying the pathogenesis of NAFLD and the identification of novel therapeutic targets remain urgent tasks in the *** the current review,we summarize studies reported in recent years that not only provide new insights into the mechanisms of NAFLD development but also explore the possibility of treating NAFLD by targeting newly identified signaling *** also discuss evidence focusing on the intrahepatic targets involved in the pathogenesis of NAFLD as well as extrahepatic targets affecting liver metabolism and function.

关键词： Nonalcoholic fatty liver disease Nonalcoholic steatohepatitis Pharmaceutical strategies Liver microenvironment Gut-liver axis Adipose tissue-liver axis

BACKLUND TRANSFORMATIONS FOR THE EQUATION∂^(2) 2u/∂x^(1)∂x^(1)+∂^(2)u/∂x^(2)∂x^(2)=f(u)

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

Applied Mathematics and Mechanics(English Edition) 1989年第2期10卷 139-143页

作者： Li yan guang Department of Mechanics Peking University Beijing

Backlund transformations for the equation∂^(2)2u/∂x^(1)∂x^(1)+∂^(2)u/∂x^(2)∂x^(2)=f(u)(here is an arbitrary function)is studied in this paper,using the procedure of Wahlquist and Estabrook(WEP).We conclude that the condition d^(2)f/du^(2)=λfis sufficient for the existence of Backlund transformations for the equation of our interest.A special case of our results leads to the conclusion of Leibbrandt[1,2].

关键词： x~2=f x~1 x~2 CKLUND TRANSFORMATIONS FOR THE EQUATION

Evaluation of intracoronary function after reduction of ventricular rate by esmolol in severe stenotic myocardial bridge: A case report

在线全文

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2022年第12期10卷 3828-3833页

作者： Long-Jun Sun Ding-guang yan Shu-Wei Huang Department of Cardiovascular Medicine Zhejiang Chinese Medical UniversityHangzhou 310005Zhejiang ProvinceChina

BACKGROUND Severe stenotic myocardial bridges(MBs)have been reported to lead to intracoronary ischaemia,but the physiological evaluation of MBs using intracoronary function evaluation indicators after intraoperative drug treatment has not been fully *** SUMMARY We performed through snuff fossa for coronary angiography in a patient with chest tightness after repeated exercise,and the results showed that the middle part of the anterior descending branch was a MB with 100%systolic *** intracoronary function evaluation(defined as the ratio of distal coronary pressure to aortic pressure with zero microcirculation resistance)was instantaneous wave-free ratio(IFR)without drug and fractional flow reserve(FFR)with *** IFR was 0.73,and the FFR was *** esmolol 0.02μg/kg/min was intravenously *** IFR and FFR were measured again when the heart rate dropped to 60 beats/*** IFR was 0.83,and the FFR *** This case report is a case of isolated MB with severe *** intraoperative drug treatment decreased the ventricular rate,an increase in the coronary function evaluation index was immediately observed to confirm the effective improvement of coronary blood flow.

关键词： Myocardial bridge FFR IFR Drug therapy Coronary artery disease Angiography Coronary Case report

Rolling Contact Fatigue Properties of SAE 8620 Steel after Case Carburizing

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 Iron and Steel Research International 2016年第7期23卷 711-716页

作者： yan-guang CAO Le XU Gou-qiang ZHANG Jie SHI Mao-qiu WANG Institute of Special Steels Central Iron and Steel Research Institute

Rolling contact fatigue（RCF）properties of SAE 8620 steel after case carburizing have been investigated under two contact stresses of 4.0and *** show that the RCF life ranges from 2.5×10^6 to 3×10^7 cycles under the contact stress of 5.5GPa,while it can be more than 1×10^8 cycles under the contact stress of *** rated fatigue life L_（10）（lives with the 10%failure）is also drastically shortened from 9.8×10^6 to 5.4×10^5 cycles when the contact stress is increased from 4.0to *** calculations and fractographs show that the maximum shear stress and the contact area increase with increasing the contact stress,making RCF tend to occur earlier.

关键词： case hardening steel carburizing rolling contact fatigue contact stress SAE 8620steel

Distribution- and Metabolism-Based Drug Discovery: A Potassium-Competitive Acid Blocker as a Proof of Concept

在线全文

学校读者我要写书评

暂无评论

Research 2022年第4期2022卷 609-620页

作者： Ming-Shu Wang Yi Gong Lin-Sheng Zhuo Xing-Xing Shi yan-guang Tian Chang-Kang Huang Wei Huang guang-Fu yang Key Laboratory of Pesticide e Chemical Biology of Ministry of Education International Joint Research Center for Intelligent Biosensor Technology and HealthCollege of ChemistryCentral China Normal UniversityWuhan 430079China Nanjing Shuohui Pharmatechnology Co. Ltd.Nanjing 210046China

Conventional methods of drug design require compromise in the form of side effects to achieve sufficient efficacy because targeting drugs to specific organs remains ***,new strategies to design organ-specific drugs that induce little toxicity are *** on characteristic tissue niche-mediated drug distribution(TNMDD)and patterns of drug metabolism into specific intermediates,we propose a strategy of distribution-and metabolism-based drug design(DMBDD);through a physicochemical property-driven distribution optimization cooperated with a well-designed metabolism pathway,SH-337,a candidate potassium-competitive acid blocker(P-CAB),was ***-337 showed specific distribution in the stomach in the long term and was rapidly cleared from the systemic ***,SH-337 exerted a comparable pharmacological effect but a 3.3-fold higher no observed adverse effect level(NOAEL)compared with FDA-approved *** study contributes a proof-of-concept demonstration of DMBDD and provides a new perspective for the development of highly efficient,organ-specific drugs with low toxicity.

关键词： drugs organs Potassium