检索结果-南通市图书馆

Research on Cooling Effectiveness in Stepped Slot Film Cooling Vane

在线全文

学校读者我要写书评

暂无评论

Journal of Thermal Science 2016年第3期25卷 273-279页

作者： LI Yulong wu Hong zhou feng RONG Chengjun National Key Laboratory of Science and Technology on Aero-Engine Aero-Thermodynamics Beihang University

As one of the most important developments in air cooling technology for hot parts of the aero-engine, film cool- ing technology has been widely used. Film cooling hole structure exists mainly in areas that have high temperature, uneven cooling effectiveness issues when in actual use. The first stage turbine vanes of the aero-engine consume the largest portion of cooling air, thereby the research on reducing the amount of cooling air has the greatest potential. A new stopped slot film cooling vane with a high cooling effectiveness and a high cooling uniformity was researched initially. Through numerical methods, the affecting factors of the cooling effectiveness of a vane with the stepped slot film cooling structure were researched. This paper focuses on the cooling effectiveness and the pressure loss in different blowing ratio conditions, then the most reasonable and scientific structure parameter can be obtained by analyzing the results. The results show that 1.0 mm is the optimum slot width and 10.0 is the most reasonable blowing ratio. Under this condition, the vane achieved the best cooling result and the highest cooling effectiveness, and also retained a low pressure loss.

关键词： Film cooling Cooling effectiveness Blowing ratio Pressure loss

Simplified fabrication of high areal capacitance all-solid-state micro-supercapacitors based on graphene and MnO_2 nanosheets

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2018年第4期29卷 582-586页

作者： Jieqiong Qin zhong-Shuai wu feng zhou Yanfeng Dong Han Xiao Shuanghao Zheng Sen Wang Xiaoyu shi Haibo Huang Chenglin Sun Xinhe Bao Dalian National Laboratory for Clean Energy Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 China State Key Laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 China University of Chinese Academy of Sciences Beijing 100049 China Department of Chemical Physics University of Science and Technology of China Hefei 230026 China

All-solid-state micro-supercapacitors are acknowledged as a very promising class of microscale energy storage devices for directly integrating portable and wearable electronics. However, the improvement of electrochemical performance from materials to devices still remains tremendous challenges. Here, we demonstrate a novel and universal mask-assisted filtration technology for the simplified fabrication of all-solid-state planar micro-supercapacitors（MSCs） based on interdigital patterns of 2D pseudocapacitive MnO2 nanosheets and electrochemically exfoliated graphene film as both electrode and current collector, and polyvinyl alcohol/Li Cl gel as electrolyte. Remarkably, the resulting MSCs exhibit outstanding areal capacitance of ～355 m F/cm^2, which is among the highest values reported in the state-of-the-art MSCs. Meanwhile, MSCs possess exceptionally mechanical flexibility as high as ～92% of initial capacitance even at a highly bending angle of 180°, excellent cyclability with a capacitance retention of 95% after 3000 cycles, and impressive serial or parallel integration for modulating the voltage or capacitance. Therefore, our proposed strategy of simplified construction of MSCs will pave the ways for utilizing graphene and analogous pseudocapactive nanosheets in high-performance MSCs.

关键词： MnO2 nanosheets Graphene All-solid-state Planar Micro-supercapacitors Energy storage

Structural and biochemical studies of RIG-I antiviral signaling

在线全文

学校读者我要写书评

暂无评论

Protein & Cell 2013年第2期4卷 142-154页

作者： Miao feng Zhanyu Ding liang Xu liangliang Kong Wenjia Wang shi Jiao Zhubing shi Mark IGreene Yao Cong Zhaocai zhou State Key Laboratory of Cell Biology Institute of Biochemistry and Cell BiologyShanghai Institutes for Biological SciencesChinese Academy of SciencesShanghai 200031China State Key Laboratory of Molecular Biology Institute of Biochemistry and Cell BiologyShanghai Institutes for Biological SciencesChinese Academy of SciencesShanghai 200031China Department of Pathology and Laboratory Medicine University of PennsylvaniaPA 19104USA

Retinoic acid-inducible gene I(RIG-I)is an important pattern recognition receptor that detects viral RNA and triggers the production of type-I interferons through the downstream adaptor MAVS(also called IPS-1,CARDIF,or VISA).A series of structural studies have elaborated some of the mechanisms of dsRNA recognition and activation of *** studies have proposed that K63-linked ubiquitination of,or unanchored K63-linked polyubiquitin binding to RIG-I positively regulates MAVS-mediated antiviral *** phos-phorylation of RIG-I appears to play an inhibitory role in controlling RIG-I antiviral signal *** we performed a combined structural and biochemical study to further define the regulatory features of RIG-I *** and dsRNA binding triggered dimeriza-tion of RIG-I with conformational rearrangements of the tandem CARD *** length RIG-I appeared to form a complex with dsRNA in a 2:2 molar ***-pared with the previously reported crystal structures of RIG-I in inactive state,our electron microscopic struc-ture of full length RIG-I in complex with blunt-ended dsRNA,for the first time,revealed an exposed active conformation of the CARD ***,we found that purified recombinant RIG-I proteins could bind to the CARD domain of MAVS independently of dsRNA,while S8E and T170E phosphorylation-mimick-ing mutants of RIG-I were defective in binding E3 ligase TRIM25,unanchored K63-linked polyubiquitin,and MAVS regardless of *** findings suggested that phosphorylation of RIG inhibited downstream signaling by impairing RIG-I binding with polyubiquitin and its interaction with MAVS.

关键词： RIG-I MAVS antiviral signaling polyubiq-uitin phosphorylation

Experimental simulation and dynamic model analysis of Cadmium(Cd)release in soil affected by rainfall leaching in a coal-mining area

在线全文

学校读者我要写书评

暂无评论

Journal of Groundwater Science and Engineering 2021年第1期9卷 65-72页

作者： zhou Hao wu Yong HUANG feng TANG Xue-fang College of Environment and Civil Engineering Chengdu University of TechnologyChengdu 610059China State Key Laboratory of Geohazard Prevention and Geoenvironment Protection Chengdu 610059China

In order to explore the influence of rainfall on the release of heavy metal Cadmium(Cd)in soil in a coal-mining area,soil column leaching experiments were carried out by simulating 3 types of rainfall(acid rain,normal rainfall,and actual rainfall)with 5 different pH values(4,5,6,6.7,7),and 65 groups of data about leachate pH value and Cd concentration were obtained *** results indicate the general change rule of Cd concentration in leachate:(1)the easiness of Cd release is negatively correlated to the pH value of leaching solution and positively correlated the leaching amount;(2)leaching solution with lower pH values shows more obvious release *** by solution with different pH values,the release of Cd in soil ranks as follows:Acid rain group>normal rainfall group>actual rainfall *** the first stage,the acidity of rainfall has a significant impact on the release of Cd in soil,but in the second stage,the release of Cd is alleviated due to the soil *** the four dynamic equations to simulate the release of Cd in soil,the modified Elovich equation can describe the process most accurately,with the highest coefficient of determination R2 of *** results can serve as a reference for further study on the migration,transformation and enrichment of Cd in soil.

关键词： Rainfall pH value Soil Cd Dynamic equation

In situ formed cross-linked polymer networks as dual-functional layers for high-stable lithium metal batteries

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 Energy Chemistry 2023年第4期79卷 253-262页

作者： Lei shi Wanhui Wang Chunjuan Wang Yang zhou Yuezhan feng Tiekun Jia fang Wang Zhiyu Min Ji Hu Zhigang Xue School of Materials Science and Engineering School of Environmental Engineering and ChemistryLuoyang Institute of Science and TechnologyLuoyang 471023HenanChina Key Laboratory for Material Chemistry of Energy Conversion and Storage Ministry of EducationSchool of Chemistry and Chemical EngineeringHuazhong University of Science and TechnologyWuhan 430074HubeiChina Key Laboratory of Advanced Materials Processing&Mold(Ministry of Education) National Engineering Research Center for Advanced Polymer Processing TechnologyZhengzhou UniversityZhengzhou 450002HenanChina Henan Intelligent Manufacturing Engineering Technology Research Center for Building Profile Luoyang Institute of Science and TechnologyLuoyang 471023HenanChina Henan Province International Joint Laboratory of Materials for Solar Energy Conversion and Lithium Sodium based Battery Luoyang Institute of Science and TechnologyLuoyang 471023HenanChina

Lithium-metal anodes(LMAs)have been recognized as the ultimate anodes for next-generation batteries with high energy density,but stringent assembly-environment conditions derived from the poor moisture stability dramatically hinder the transformation of LMAs from laboratory to ***,an in situ formed cross-linked polymer layer on LMAs is designed and constructed by a facile thiol-acrylate click chemistry reaction between poly(ethylene glycol)diacrylate(PEGDA)and the crosslinker containing multi thiol groups under UV *** to the hydrophobic nature of the layer,the treated LMAs demonstrate remarkable humid stability for more than 3 h in ambient air(70%relative humidity).The coating humid-resistant protective layer also possesses a dual-functional characterization as solid polymer electrolytes by introducing lithium bis(trifluoromethanesulfonyl)imide in the system in *** intimate contact between the polymer layer and LMAs reduces interfacial resistance in the assembled Li/LiFePO_(4)or Li/LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)full cell effectively,and endows the cell with an outstanding cycle performance.

关键词： Lithium-metal anode Humid-resistant protective film Solid-state polymer electrolytes Cross-linked polymers

Single-atom sites regulation by the second-shell doping for efficient electrochemical CO_(2)reduction

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2024年第9期35卷 360-363页

作者： Qian-Qian Tang Li-fang feng Zhi-Peng Li shi-Hao wu Long-Shuai Zhang Qing Sun Mei-feng wu Jian-Ping Zou Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle Nanchang Hangkong UniversityNanchang 330063China National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization Nanchang Hangkong UniversityNanchang 330063China

Nitrogen-doped carbon loaded single-atom catalysts(SACs)are promising candidates for electrocatalytic conversion of CO_(2)into high-valuable chemicals,and the modification of catalysts by heteroatom-doping strategy is an effective approach to enhance the CO_(2)reduction ***,the large difference exists in atomic radius between nitrogen atoms and the doped heteroatoms may lead to the poor stability of active *** this study,we have synthesized a Ni single atom catalyst with S doping at the secondshell on the ultrathin carbon nanosheets support(Ni-N_(4)-SC)by solid-phase *** S atom in the second-shell contributes to the higher efficiency of CO_(2)conversion at lower potentials while the Ni-N_(4)-SC can be more *** experimental results and theoretical calculations indicate that the S atom in second-shell breaks the uniform charge distribution and reduces the free energy of hydrogenation,which can increase the adsorption of CO_(2),accelerate charge transfer,and reduce the reaction energy *** work reveals the close relationship between the second-shell and the electrocatalytic activity of single atom sites,which also provides a new perspective to design efficient single atom catalysts.

关键词： Single-atom catalyst Heteroatom-doping Second shell CO_(2)electroreduction Electronic structure regulation

Self-expandable metallic stent placement plus laparoscopy for acute malignant colorectal obstruction

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2013年第33期19卷 5513-5519页

作者： Jia-Min zhou Li-Qing Yao Jian-Min Xu Mei-Dong Xu Ping-Hong zhou Wei-feng Chen Qiang shi zhong Ren Tao Chen Yun-shi zhong Department of Endoscopic Center Zhongshan HospitalFudan University Department of General Surgery Zhongshan HospitalFudan University

AIM:To investigate the clinical advantages of the stent-laparoscopy approach to treat colorectal cancer(CRC)patients with acute colorectal obstruction(ACO).METHODS:From April 2008 to April 2012,surgeryrelated parameters,complications,overall survival(OS),and disease-free survival(DFS)of 74 consecutive patients with left-sided CRC presented with ACO who underwent self-expandable metallic stent(SEMS)placement followed by one-stage open(n=58)or laparoscopic resection(n=16)were evaluated *** stent-laparoscopy group was also compared with a control group of 96 CRC patients who underwent regular laparoscopy without ACO between January 2010 and December 2011 to explore whether SEMS placement influenced the laparoscopic procedure or reduced long-term survival by influencing CRC oncological ***:The characteristics of patients among these groups were *** rate of conversion to open surgery was 12.5%in the stent-laparoscopy *** function recovery and postoperative hospital stay were significantly shorter(3.3±0.9 d vs 4.2±1.5 d and 6.7±1.1 d vs 9.5±6.7 d,P=0.016 and P=0.005),and surgical time was significantly longer(152.1±44.4 min vs 127.4±38.4 min,P=0.045)in the stent-laparoscopy group than in the stent-open ***-related complications and the rate of admission to the intensive care unit were lower in the stent-laparoscopy *** were no significant differences in the interval between stenting and surgery,intraoperative blood loss,OS,and DFS between the two stent *** with those in the stentlaparoscopy group,all surgery-related parameters,complications,OS,and DFS in the control group were ***:The stent-laparoscopy approach is a feasible,rapid,and minimally invasive option for patients with ACO caused by left-sided CRC and can achieve a favorable long-term prognosis.

关键词： Self-expandable metallic stent Colorectal cancer Endoscopy Laparoscopy Efficiency Safety

Omental fibroma combined with right indirect inguinal hernia masquerades as a scrotal tumor: A case report

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2024年第5期12卷 988-994页

作者： Ping zhou Chan-Hui Jin Ying shi Guo-Qing Ma Wen-Hao wu Yu Wang kun Cai wu-feng Fan Tian-Bao Wang Department of Gastrointestinal Surgery South China Hospital of Shenzhen UniversityShenzhen 518000Guangdong ProvinceChina

BACKGROUND The most common causes of scrotal enlargement in patients include primary tumor of the scrotum,inflammation,hydrocele of the tunica vaginalis,and indirect inguinal hernia;scrotal enlargement caused by external tumors of the scrotum is *** patient had both a greater omentum tumor and an inguinal hernia,and the tumor protruded into the scrotum through the hernia sac,which is even ***,omental tumors are mostly metastatic,and primary omental fibroma is *** SUMMARY Here,we report a rare case of a 25-year-old young man with scrotal enlargement and pain for 3 *** examination and multidisciplinary discu-ssions considered intra-abdominal tumor displacement and inguinal hernia,and intraoperative exploration confirmed that the greater omentum tumor protruded into the ***,tumor resection and tension-free inguinal hernia repair were *** final diagnosis was benign fibroma of the greater omentum accompanied by an indirect inguinal *** This unusual presentation of a common inguinal hernia disease illustrates the necessity of performing detailed history taking,physical examination,and imaging before surgery.

关键词： Hernia Indirect inguinal hernia Fibroma Omental tumor Scrotal tumor Greater omentum Case report

Insights of stem cell-based endogenous repair of intervertebral disc degeneration

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Stem Cells 2020年第4期12卷 266-276页

作者： Yang Liu Yan Li Li-Ping Nan feng Wang shi-feng zhou Xin-Min feng Hao Liu liang Zhang Department of Orthopedics West China Hospital of Sichuan UniversityChengdu 610000Sichuan ProvinceChina Department of Orthopedics Dalian Medical UniversityDalian 116000Liaoning ProvinceChina Department of Oncology The Affiliated Cancer HospitalSchool of MedicineUESTCChengdu 610000Sichuan ProvinceChina Department of Orthopedics Clinical Medical College of Yangzhou UniversityYangzhou 225000Jiangsu ProvinceChina

Low back pain has become more prevalent in recent years,causing enormous economic burden for society and *** therapies used in clinics including conservative treatment and surgery can only relieve *** cell-based treatment such as mesenchymal stem cell transplantation poses problems such as short duration of therapeutic effect and ***,the discovery and identification of stem cell niche and stem/progenitor cells in intervertebral disc bring increased attention to endogenous repair ***,we review the studies involving endogenous repair strategy and present the characteristics and current status of this ***,we also discuss the strategy and perspective of endogenous repair strategy in future.

关键词： Low back pain Intervertebral disc degeneration Stem cell niche Stem/progenitor cell Endogenous repair strategy Stem cell treatment