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Study on Performance of Savonius Rotor Type Wave Energy Converter Used in Conjunction with Floating Breakwater

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China Ocean Engineering 2021年第4期35卷 578-587页

作者： LIU zuo-shi gong Kai HUANG Fang-ping HUANG Yan-chen School of Mechanical and Electrical Engineering Jiangxi University of Science and TechnologyGanzhou 341000China Ningbo Institute of Technology Zhejiang UniversityNingbo 315100China School of Mechanical Engineering Zhejiang UniversityHangzhou 310027China

In the present study,the performance characteristics of a Savonius rotor type wave energy converter used in conjunction with a conventional double-buoy floating breakwater is investigated using physical model *** Savonius rotor type converter is suspended under the double-buoy floating breakwater to achieve wave attenuation while generating electricity,thereby enhancing the overall wave-elimination effect of the *** Savonius rotor is tested with different water submergence depths,and a reasonable relative submergence depth is determined within the scope of the research *** hydrodynamics and energy capture performance of the combined breakwater with four different sizes of Savonius rotor under different wave conditions are studied,and the transmission coefficient of the experimental device is *** results show that when the optimal relative submergence depth is 0.65D,where D is the impeller diameter,there is a correspondence between the optimal performance of Savonius rotor with different rotor sizes and the wave period and wave *** optimal energy capture efficiency of the wave energy converter reaches 17%−20.5%,and the transmission coefficient is reduced by 35%−45%compared with the conventional double-buoy breakwater.

关键词： floating breakwater Savonius rotor energy capture efficiency transmission coefficient

基于倾向评分匹配分析不同手术方式对早期肺腺癌女性预后及临床疗效的影响

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西部医学 2024年第6期36卷 899-905页

作者：宫哲轩王键龙左越秦岩武广义河北大学临床医学院河北保定071000 河北大学附属医院中心实验室河北保定071000 河北大学附属医院麻醉科河北保定071000

目的探讨肺叶切除术和亚肺叶切除术对早期肺腺癌女性的预后影响及临床疗效。方法收集美国国立癌症研究所监测、流行病学和结果(SEER)数据库中2010年—2015年的Ⅰ、Ⅱ期女性肺腺癌患者的临床信息,使用倾向评分匹配均衡基线资料。匹配后采... 详细信息

目的探讨肺叶切除术和亚肺叶切除术对早期肺腺癌女性的预后影响及临床疗效。方法收集美国国立癌症研究所监测、流行病学和结果(SEER)数据库中2010年—2015年的Ⅰ、Ⅱ期女性肺腺癌患者的临床信息,使用倾向评分匹配均衡基线资料。匹配后采用Kaplan-Meier法比较肺叶切除术(肺叶切除组)和亚肺叶切除术(亚肺叶切除组)总体生存率(OS)和肺癌特异性生存率(LCSS)的差异及相关因素的亚组生存分析,采用单因素和基于向前逐步回归方法筛选出的多因素Cox比例风险模型分析影响患者OS及LCSS的预后因素。结果共纳入6721例符合条件的患者,肺叶切除组5513例,亚肺叶切除组1208例。倾向性评分匹配后获得基线资料均衡的两组患者各1208例。K-M生存分析显示肺叶切除组的OS和LCSS均优于亚肺叶切除组(P<0.001)。Cox单因素分析发现,肺叶切除组的OS(HR=1.637,95%CI:1.419~1.890)和LCSS(HR=1.648,95%CI:1.367~1.988)优于亚肺叶切除组(P<0.001)。年龄、婚姻状态为离异或丧偶、肿瘤大小、区域淋巴结转移、病理分期和临床分期均是影响LCSS和OS的危险因素(P<0.01);肺下叶是患者LCSS的保护因素(P=0.028);化疗是影响LCSS的危险因素(P<0.001)。向前逐步Cox回归分析结果发现除手术方式对预后有影响外,年龄较大、病理分级及临床分期更大的患者,其OS较差(P<0.001);仅临床分期与LCSS相关(P<0.001)。结论Ⅰ、Ⅱ期女性肺腺癌患者行肺叶切除较亚肺叶切除的预后好,推荐早期肺腺癌女性患者采用肺叶切除术。

关键词：肺腺癌手术方式倾向性评分匹配法 SEER数据库

Non-keyhole Friction Stir Welding for 6061-T6 Aluminum Alloy

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Acta Metallurgica Sinica(English Letters) 2022年第5期35卷 763-772页

作者： Peng gong Ying-Ying zuo Shu-De Ji De-Jun Yan Deng-Chang Li Zhen Shang College of Aerospace Engineering Shenyang Aerospace UniversityShenyang110136China Guangdong Key Laboratory of Enterprise Advanced Welding Technology for Ships CSSC Huangpu Wenchong Shipbuilding Company LimitedGuangzhou510715China

A novel non-keyhole friction stir welding technique was proposed to weld the butt joint of 6061-T6 aluminum alloy with the thickness of 6 mm.A sound joint was obtained by this technique,simultaneously eliminating the flash,shoulder mark and keyhole *** sleeve directly affected zone(SDAZ)and the sleeve indirectly affected zone(SIAZ)were divided into the joint according to the plunging position of the hollow *** lack of root penetration defect was avoided when the plunging depth of the hollow sleeve was only 4.2 mm,because the hollow part inside the sleeve improved the material flow below the *** S-shaped line was left at the SIAZ,and the height of it had the minimum value of 1.47 mm at 20 mm/*** the failure location of the joint was in SIAZ/SDAZ or the heat-affected zone(HAZ)depended on the height and bonding strength of the S-shaped *** joint fracture location changed from the SIAZ/SDAZ at 35 mm/min to the HAZ at 20 and 30 mm/*** maximum tensile strength of 224.3 MPa was obtained at 30 mm/min which was 73.7%of that of the base *** fracture surface morphology exhibited the typical ductile fracture.

关键词： Non-keyhole friction stir welding Welding tool simplification Microstructures Material flow Mechanical properties

Determining structural ensembles of flexiblemulti-domaTn proteins using small-angle X-rayscattering and molecular dynamics simulations

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Protein & Cell 2015年第8期6卷 619-623页

作者： Yonghui Zhang Bin Wen Junhui Peng Xiaobing zuo Qingguo gong Zhiyong Zhang Hefei National Laboratory for Physical Science at Microscale and School of Life Sciences University of Science and Technology of China Hefei 230026 China Advanced Photon Source Argonne National Laboratory Chicago IL 60437 USA

Dear Editor, A multi-domain protein consists of two or more well-folded domains connected by flexible linkers, which may lead to large scale inter-domain motions related to the protein function. Therefore, it is appropriate to represent a flexible multi-domain protein by an ensemble of structures contain- ing multiple conformational states （Bernad5 and Blackledge, 2010）. Although X-ray crystallography is currently the most popular technique for structure determination, it would be rather challenging to solve structure of such a flexible multi- domain protein since it is hard to obtain high-quality crystals if the protein does not stabilize in a dominant conformation.

关键词： Nuclear Magnetic Resonance Domain Orientation Nuclear Magnetic Resonance Structure Root Mean Square Deviation SAXS Data

A Strategy to Reduce the Peak Temperature of the Chip Working under Dynamic Power Using the Transient Cooling Effect of the Thin-Film Thermoelectric Cooler

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Journal of Thermal Science 2022年第4期31卷 1094-1105页

作者： WU Yongjia CHEN Sen gong Tingrui SHI Tianhao zuo Lei YAN Yonggao FANG Yueping MING Tingzhen School of Civil Engineering and Architecture Wuhan University of TechnologyWuhan 430070China Microsystem&Terahertz Research Center China Academy of Engineering PhysicsChengdu 610200China Department of Mechanical Engineering Virginia TechBlacksburgVA 24060USA State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China School of Energy Construction and Environment Coventry UniversityCoventry CV15FBUK

The thin-film thermoelectric cooler(TEC)is a promising solid-state heat pump that can remove the high local heat flux of chips utilizing the Peltier *** an electric current pulse is applied to the thin-film TEC,the TEC can achieve an instantaneous lower temperature compared to that created by a steady *** this paper,we developed a novel strategy to reduce the peak temperature of the chip working under dynamic power,thus making the semiconductor chip operate reliably and efficiently.A three-dimensional numerical model was built to study the transient cooling performance of the thin-film TEC on *** effects of parameters,such as the current pulse,the heat flux,the thermoelement length,the number of thermoelements,and the contact resistance on the performance of the thin-film TEC,were *** results showed that when a current pulse of 0.6 A was applied to the thin-film TEC before the peak power of the chip,the peak temperature of the chip was reduced by more than 10℃,making the thin-film thermoelectric cooler a promising technology for the temperature control of modern chips with high peak powers.

关键词： temperature control transient cooling thermoelectric cooler heat transfer

Sediment transport following water transfer from Yangtze River to Taihu Basin

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Water Science and Engineering 2011年第4期4卷 431-444页

作者： Zheng gong Chang-kuan ZHANG Cheng-biao zuo Wei-deng WU State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering Hohai University Nanjing 210098 P. R. China Laboratory of Ocean Dynamics ：Third Institute of Oceanography State Oceanic Administration Xiamen 361005 P. R. China

To meet the increasing ：need of fresh water and to improve the water quality of Taihu Lake, water transfer from the Yangtze River was initiated in 2002. This study was performed to investigate the sediment distribution along the river course following water transfer. A rainfall-runoff model was first built to calculate the runoff of the Taihu Basin in 2003. Then, the flow patterns of river networks were simulated using a one-dimensional river network hydrodynamic model. Based on the boundary conditions of the flow in tributaries of the Wangyu River and the water level in Taihu Lake, a one-dimensional hydrodynamic and sediment transport numerical model of the Wangyu River was built to analyze the influences of the inflow rate of the water transfer and the suspended sediment concentration （SSC） of inflow on the sediment transport. The results show that the water transfer inflow rate and SSC of inflow have significant effects on the sediment distribution. The higher the inflow rate or SSC of inflow is, the higher the SSC value is at certain cross-sections along the ：river course of water transfer. Higher inflow rate and SSC of inflow contribute to higher sediment deposition per kilometer and sediment thickness. It is also concluded that a sharp decrease of the inflow velocity at the entrance of the Wangyu River on the river course of water transfer induces intense sedimentation at the cross-section near the Changshu hydro-junction. With an increasing distance from the Changshu hydro-junction, the sediment deposition and sedimentation thickness decrease gradually along the river course.

关键词： Taihu Basin Taihu Lake river network water transfer rainfall-runoff model 1-D hydrodynamic numerical model cohesive sediment

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相邻炮孔爆生裂纹相互作用试验研究

金属矿山 2024年第3期 150-157页

作者：刘朕葛丰源左进京何松林宫国慧帅培马中建北京科技大学土木与资源工程学院北京100083 金属矿山高效开采与安全教育部重点实验室北京100083 鞍钢集团矿业弓长岭有限公司辽宁辽阳111007 攀钢集团矿业有限公司四川攀枝花617000

为了研究爆炸载荷作用下的相邻炮孔间爆生裂纹相互作用机理,采用新型数字激光动态焦散线试验系统,通过改变炮孔间距,调整药包装药结构,研究了不同间距、不同装药结构下爆生裂纹相向扩展作用机理。结果表明:2炮孔均为普通药包时爆生裂纹... 详细信息

为了研究爆炸载荷作用下的相邻炮孔间爆生裂纹相互作用机理,采用新型数字激光动态焦散线试验系统,通过改变炮孔间距,调整药包装药结构,研究了不同间距、不同装药结构下爆生裂纹相向扩展作用机理。结果表明:2炮孔均为普通药包时爆生裂纹随机分布,切缝药包与普通药包相互作用时前期爆生裂纹独立扩展,后期相互吸引互为自由面。2炮孔均为切缝药包相互作用时,炮孔间距较小情况下爆生裂纹在炮孔中心轴线方向贯穿呈“直线型”分布,间距较大时裂纹在炮孔中心轴线方向呈“牵手型”分布。随着炮孔间距增大,裂纹相遇时能量损耗较大,动态应力强度因子峰值和裂纹速度峰值较小,振幅较低,炮孔周围形成的粉碎区面积及次裂纹长度越小,分形维数也越小。

关键词：动态焦散线爆破载荷爆生裂纹应力强度因子分形维数

Self‑Generated Buried Submicrocavities for High‑Performance Near‑Infrared Perovskite Light‑Emitting Diode

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Nano-Micro Letters 2023年第8期15卷 355-367页

作者： jiong Li Chenghao Duan Qianpeng Zhang Chang Chen Qiaoyun Wen Minchao Qin Christopher C.S.Chan Shibing Zou Jianwu Wei zuo Xiao Chuantian zuo Xinhui Lu Kam Sing Wong Zhiyong Fan Keyou Yan School of Environment and Energy State Key Lab of Luminescent Materials and DevicesGuangdong Provincial Key Laboratory of Solid Wastes Pollution Control and RecyclingSouth China University of TechnologyGuangzhou 510000People’s Republic of China Department of Electronic and Computer Engineering The Hong Kong University of Science and TechnologyClear Water BayKowloonHong KongPeople’s Republic of China Department of Physics The Chinese University of Hong KongShatinHong KongPeople’s Republic of China Department of Physics The Hong Kong University of Science and TechnologyClear Water BayKowloon 999077Hong KongPeople’s Republic of China School of Chemistry and Chemical Engineering Guangxi UniversityNanning 530004People’s Republic of China Center for Excellence in Nanoscience(CAS) Key Laboratory of Nanosystem and Hierarchical Fabrication(CAS)National Center for Nanoscience and TechnologyBeijing 100190People’s Republic of China

ABSTRACT Embedding submicrocavities is an effective approach to improve the light out-coupling efficiency(LOCE)for planar perovskite light-emitting diodes(PeLEDs).In this work,we employ phenethylammonium iodide(PEAI)to trigger the Ostwald ripening for the downward recrystallization of perovskite,resulting in spontaneous formation of buried submicrocavities as light output *** simulation suggests the buried submicrocavities can improve the LOCE from 26.8 to 36.2%for near-infrared ***,PeLED yields peak external quantum efficiency(EQE)increasing from 17.3%at current density of 114 mA cm^(−2)to 25.5%at current density of 109 mA cm^(−2)and a radiance increasing from 109 to 487 W sr^(−1)m^(−2)with low *** turn-on voltage decreased from 1.25 to 1.15 V at 0.1 W sr^(−1)m^(−2).Besides,downward recrystallization process slightly reduces the trap density from 8.90×10^(15)to 7.27×10^(15)cm^(−3).This work provides a self-assembly method to integrate buried output coupler for boosting the performance of PeLEDs.

关键词： Perovskite light-emitting diodes Downward recrystallization Buried submicrocavities Light out-coupling efficiency Radiative recombination

Amyloid beta-peptide worsens cognitive impairment following cerebral ischemia-reperfusion injury

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Neural Regeneration Research 2013年第26期8卷 2449-2457页

作者： Bo Song Qiang Ao Ying Niu Qin Shen Huancong zuo Xiufang Zhang Yandao gong Research Center of Stem Cells and Regenerative Medicine School of Medicine Tsinghua University State Key Laboratory of Biomembrane and Membrane Biotechnology School of Life Sciences Tsinghua University Institute of Neurology Disorders Yuquan Hospital Tsinghua University

Amyloid 13-peptide, a major component of senile plaques in Alzheimer＇s disease, has been implicated in neuronal cell death and cognitive impairment. Recently, studies have shown that the pathogenesis of cerebral ischemia is closely linked with Alzheimer＇s disease. In this study, a rat model of global cerebral ischemia-reperfusion injury was established via occlusion of four arteries; meanwhile, fibrillar amyloid [3-peptide was injected into the rat lateral ventricle. The Morris water maze test and histological staining revealed that administration of amyloid 13-peptide could further aggravate impairments to learning and memory and neuronal cell death in the hippocampus of rats subjected to cerebral ischemia-reperfusion injury. Western blot showed that phosphorylation of tau protein and the activity of glycogen synthase kinase 313 were significantly stronger in cerebral ischemia-reperfusion injury rats subjected to amyloid [3-peptide administration than those undergo- ing cerebral ischemia-repetfusion or amyloid 13-peptide administration alone. Conversely, the activ- ity of protein phosphatase 2A was remarkably reduced in rats with cerebral ischemia-reperfusion injury following amyloid 13-peptide administration. These findings suggest that amyloid 13-peptide can potentiate tau phosphorylation induced by cerebral ischemia-reperfusion and thereby aggravate cognitive impairment.

关键词： neural regeneration brain injury cerebral ischemia-reperfusion Alzheimer's disease amyloid 13-peptides tau proteins glycogen synthase kinase 313 protein phosphatase 2A phosphorylation grants-supported paper neuroregeneration