检索结果-南通市图书馆

Neodymium and samarium codoped PLZT ferroelectric ceramics for potential betavoltaic nuclear batteries

Journal of Rare Earths 2023年第10期41卷 1583-1589,I0004页

作者： Zhixiong song Jizhen Liu Liyan xue Zhengming Jiang Fan Yang Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou350108China CAS Key Laboratory of Design and Assembly of Functional Nanostructures Fujian Provincial Key Laboratory of NanomaterialsFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou350002China Fujian Province Joint Innovation Key Laboratory of Fuel and Materials in Clean Nuclear Energy System Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou350002China Xiamen Institute of Rare Earth Materials Haixi InstituteChinese Academy of SciencesXiamen361021China Nuclear Power Institute of China Chengdu610000China Sichuan Jcc Rare Earth Metals New Material Co. Ltd.Chengdu610000China

In this work,neodymium(Nd)and samarium(Sm)codoped lead lanthanum zirconate titanate(PLZT)ceramics were prepared by a high-temperature solid-state *** samples were characterized by X-ray diffraction,scanning electron microscopy and ferroelectric *** earth-doped PLZT ceramics show good phase *** appropriate rare earth element doping amount increases the densities of PLZT ceramics and reduces their resistivities,which is due to the role of rare earth elements in grain ***,the increase in the amount of grain boundaries caused by grain refinement also affects domain ***,with increasing doping concentration,the remnant polarization of PLZT gradually decreases,and the doping of rare earth elements also slightly reduces the band gap of *** irradiation with an X-ray simulated beta source with a particle energy of 10 keV(between the average energies of the beta particles of^3H and^(63)Ni),the ceramic sheets in this work produce current densities of up to 1.38 nA/cm^*** indicates that Nd and Sm codoped PLZT ceramics have a certain potential for application in betavoltaic batteries.

关键词： Betavoltaic battery Rare earths Ferroelectric X-ray

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

A stretchable fabric as strain sensor integrating electromagnetic shielding and electrochemical energy storage

引用

Nano Research 2023年第11期16卷 12753-12761页

作者： Xu Li Xiaohui Sun Jiuyue Zhang song xue Linjie Zhi Advanced Chemical Engineering and Energy Materials Research Center China University of Petroleum(East China)Qingdao 266580China School of Materials Science and Engineering China University of Petroleum(East China)Qingdao 266580China College of New Energy China University of Petroleum(East China)Qingdao 266580China

Multifunctional intelligent fabric plays an integral role in health management,human–machine interaction,wireless energy storage and conversion,and many other artificial intelligence ***,we demonstrate a newly developed MXene/polyaniline(PANI)multifunctional fabric integrated with strain sensing,electrochemical energy storage,and electromagnetic shielding *** multifunctional fabric-based strain sensor possesses a real-time signal response at a sizeable tensile strain of 100%with a minute strain of 0.5%,maintaining a stable and consistent signal response even after 3000 stretch–release *** addition,the multifunctional fabric exhibits excellent electromagnetic shielding capabilities,achieving a total shielding effectiveness value of up to 43 dB,and in the meantime shows attractive electrochemical energy storage performance as an electrode in a supercapacitor,offering a maximum specific capacity and energy density of 522.5 mF·cm^(−2)and 18.16μWh·cm^(−2),*** a multifunctional intelligent fabric offers versatile opportunities to develop smart clothes for various artificial intelligent applications.

关键词： strain sensor MXene polyaniline(PANI) multifunctional intelligent fabric electromagnetic interference(EMI)shielding electrochemical energy storage

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

Unsteady characteristic research on aerodynamic interaction of slotted wingtip in flapping kinematics

引用

Chinese Journal of Aeronautics 2022年第4期35卷 82-101页

作者： Dan LIU Bifeng song Wenqing YANG Dong xue Xinyu LANG School of Aeronautics Northwestern Polytechnical UniversityXi'an 710072China Yangtze River Delta Research Institute.Northwestern Polytechnical University Taiccing 215400China Research&Development Institute of Northwestern Polytechnical University in Shenzhen Shenzhen 518057China

The slotted wingtip structure of birds is considered to be the product of improving flight efficiency in the process of evolution. It can change the vortex structure of wingtip and improve aerodynamic efficiency. This paper reports a numerical investigation of slotted wing configuration undergoing bio-inspired flapping kinematics(consisting of plunging and in-line movement)extracted from a free-flying bald eagle wing. The aim is to eluci-date the collective mechanism of the flow generated by slotted tips and the lift contribution of each tip. Specifi-cally, the objective of the study is to determine how changes in the wing spacing affect the resulting aerodynamic interaction between the slotted tips and how that affects the force generation and efficiency. Changes in the phase angle between the flapping motions of slotted tips, as well as the spacings among them,can affect the resulting vortex inter-actions. The rear tips often operates in the wake of the frontal tips and, meanwhile, the vortex generated by the movement of the rear tips promote the frontal *** interaction of vortices in time and space leads to wing-wing interference and the flow around slotted tips becomes complicated and unstable. The innovative study of wingtip slot in unsteady state leads us to find that the aerodynamic interaction among slotted tips makes the overall lift characteristic better than that of the unslotted wings. The slotted wing configuration can efficiently convert more energy into lift. As the flapping frequency increases, the collective feature of slotted wing with constantly changing gaps can be more advantageous to enhance lift-generation performance.

关键词： Aerodynamic interaction Aerodynamic mechanism Flapping Unsteady behavior Wingtip slots

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

Design and Experimental Verification of a Roll Control Strategy for Large Wingspan Flapping-Wing Aerial Vehicle

引用

Journal of Bionic Engineering 2024年第4期21卷 1644-1661页

作者： Rui Meng Bifeng song Jianlin Xuan Xiaojun Yang Dong xue School of Aeronautics Northwestern Polytechnical UniversityXi’an710072China Research and Development Institute of Northwestern Polytechnical University in Shenzhen Shenzhen518057China Yangtze River Delta Research Institute of Northwestern Polytechnical University Taicang215400China

Most flapping-wing aircraft wings use a single degree of freedom to generate lift and thrust by flapping up and down,while relying on the tail control surfaces to manage ***,these aircraft have certain limitations,such as poor accuracy in attitude control and inadequate roll control *** paper presents a design for an active torsional mechanism at the wing's trailing edge,which enables differential variations in the pitch angle of the left and right wings during *** simple mechanical form significantly enhances the aircraft's roll control *** experimental verification of this mechanism was conducted in a wind tunnel using the RoboEagle flapping-wing aerial vehicle that we *** study investigated the effects of the control strategy on lift,thrust,and roll moment during flapping ***,the impact of roll control on roll moment was examined under various wind speeds,flapping frequencies,angles of attack,and wing ***,several rolling maneuver flight tests were performed to evaluate the agility of RoboEagle,utilizing both the elevon control strategy and the new roll control *** results demonstrated that the new roll control strategy effectively enhances the roll control capability,thereby improving the attitude control capabilities of the flapping-wing aircraft in complex wind field *** conclusion is supported by a comparison of the control time,maximum roll angle,average roll angular velocity,and other relevant parameters between the two control strategies under identical roll control input.

关键词： Roll control Bio-inspired Roll moment Flapping wing aerial vehicle

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

A Ruddlesden-Popper oxide as a carbon dioxide tolerant cathode for solid oxide fuel cells that operate at intermediate temperatures

引用

Chinese Journal of Chemical Engineering 2023年第4期56卷 25-32页

作者： Shujun Peng song Lei Sisi Wen Jian xue Haihui Wang School of Chemistry&Chemical Engineering Jinggangshan UniversityJi'an 343009China School of Chemistry&Chemical Engineering Guangdong Provincial Key Lab of Green Chemical Product TechnologySouth China University of TechnologyGuangzhou 510640China Beijing Key Laboratory of Membrane Materials and Engineering Department of Chemical EngineeringTsinghua UniversityBeijing 100084China

Solid oxide fuel cells(SOFCs) that operate at intermediate temperatures of 600 to 800℃ have recently received increased attention due to their improved durability, more rapid startup and shutdown, better sealing and lower cost than their counterparts operate at high temperatures. Nevertheless, intermediatetemperature SOFCs(IT-SOFCs) with popular perovskite cathodes contain alkaline-earth elements, which are prone to reaction with carbon dioxide(CO_(2)), even when the CO_(2) content is comparatively low. In this work, an alkaline-earth metal-free Ruddlesden-Popper oxide, Nd_(1.8)La_(0.2)Ni_(0.74)Cu_(0.21)Ga_(0.05)O_(4+δ)(NLNCG), is developed for IT-SOFC cathodes. The cell is based on an electrolyte with 8%(mol) Y_(2)O_(3)-stabilized Zr O_(2)(8YSZ). The NLNCG cathode exhibits an excellent CO_(2) tolerance, as proven by thermogravimetry analysis,in situ X-ray diffraction, I-V-P test, and electrochemical impedance spectroscopy(EIS), and stability measurements. The anode-supported single-cell Ni O-YSZ|YSZ|NLNCG outputs a peak power density of 0.522 W·cm^(-2) at 800℃. These findings suggest that NLNCG could be a highly suitable cathode material with CO_(2) tolerance for IT-SOFCs.

关键词： Fuel cell Hydrogen Kinetics Catalyst CO_(2)tolerance

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

Comparison of models to predict air infiltration rate of buildings with different surrounding environments

引用

Building Simulation 2024年第6期17卷 1007-1021页

作者： Shu Zheng Xiujiao song Lin Duanmu Yu xue Xudong Yang Department of Building Science Tsinghua UniversityBeijing100084China School of Civil Engineering Dalian University of TechnologyDalian116024China Shanxi Research Institute for Clean Energy Tsinghua UniversityTaiyuan030032China

The air infiltration rate of buildings strongly influences indoor environment and energy *** this study,several traditional methods for determining the air infiltration rate were compared,and their accuracy in different scenarios was ***,a method combining computational flow dynamics(CFD)with the Swami and Chandra(S-C)model was developed to predict the influence of the surrounding environment on the air infiltration *** buildings in Dalian,China,were selected:one with a simple surrounding environment and the other with a complex surrounding environment;their air infiltration rates were *** test results were used to validate the accuracy of the air infiltration rate solution models in different urban *** the building with a simple environment,the difference between the simulation and experimental results was 0.86%–22.52%.For the building with a complex environment,this difference ranged from 17.42%to 159.28%.We found that most traditional models provide accurate results for buildings with simple surrounding and that the simulation results widely vary for buildings with complex *** results of the method of combining CFD with the S-C model were more accurate,and the relative error between the simulation and test results was 10.61%.The results indicate that the environment around the building should be fully considered when calculating the air infiltration *** results of this study can guide the application of methods of determining air infiltration rate.

关键词： air infiltration rate models CFD simulation building surrounding air infiltration rate test

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

Effects of nitrogen supply methods on fate of nitrogen in maize under alternate partial root-zone irrigation

引用

International Journal of Agricultural and Biological Engineering 2020年第3期13卷 129-135页

作者： Dongliang Qi Tiantian Hu xue song Engineering Research Center of Ecology and Agriculture Use of Wetland Ministry of EducationYangtze UniversityJingzhou 434025HubeiChina Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas of Ministry of Education Northwest A&F UniversityYangling 712100ShaanxiChina

Partial root-zone irrigation(PRI)has been practiced worldwide,but little information is available on nitrogen(N)supply methods influence on fate of applied N fertilizer for crop production under PRI.A field experiment was conducted to investigate effect of N supply methods on the uptake,residual,and loss of applied N fertilizer in maize(Zea mays L.)under alternate PRI at Wuwei,northwest China in 2014.15N-labeled urea was used as N *** irrigation methods included alternate furrow irrigation(AI)and conventional furrow irrigation(CI).Two N fertilizer supply methods included conventional N supply(CN)and alternate N supply(AN),were applied in combination with each irrigation *** yield,root length density(RLD),N uptake by maize at the maturity stage,and atom%of 15N excess,residual 15N and residual NO3-N in the 0-100 cm soil layer after maize harvest were *** shown that compared to CI coupled with CN,AI coupled with AN or CN significantly increased the grain yield,harvest index,RLD,N uptake by maize,15N accumulation in grain,atom%of 15N excess in the 0-60 cm soil layer,the residual 15N and 15N uptake rates;but significantly decreased the residual NO3-N in the 0-100 cm soil layers and 15N loss ***,the synchronized rather than separation supply of N fertilizer and water enhanced the most above parameters under AI.15N uptake rate was positively correlated with RLD in the 0-40 cm soil layer,suggesting that the enhanced RLD contributed to the improved 15N uptake ***,alternate furrow irrigation coupled with conventional or alternate nitrogen supply(synchronized supply of N fertilizer and water)could help improve 15N uptake rate and reduce the 15N loss rate.

关键词： 15N-labeled technology root length density nitrogen fertilizer fate nitrogen management residual nitrogen

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

Emerging antivirals for the treatment of hepatitis B

引用

World Journal of Gastroenterology 2014年第24期20卷 7707-7717页

作者： xue-Yan Wang Hong-song Chen Peking University Hepatology Institute Peking University People’s Hospital Beijing Key Laboratory of Hepatitis C and Immunotherapy for Liver Diseases

Chronic infection with hepatitis B virus(HBV)constitutes a major global public health threat,causing substantial disease burdens such as liver cirrhosis and hepatocellular carcinoma,thus representing high unmet medical *** available therapies are safe,well tolerated,and highly effective in decreasing viremia and improving measured clinical outcomes with low rates of antiviral ***,long-term management remains a clinical challenge,mainly due to the slow kinetics of HBV surface antigen *** this article,we review emerging antivirals directed at novel targets derived from mechanisms of viral cellular entry,viral replication,viral assembly,and the host immune response,leading to preclinical and clinical trials for possible future therapeutic *** recent therapeutic advances in the development of all categories of HBV inhibitors may pave the way for regimens of finite duration that result in long-lasting control of chronic hepatitis B infection.

关键词： Hepatitis B Antiviral Nucleoside analogue Nucleotide analogue Non-nucleoside antivirals

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

Extracts of Celastrus Orbiculatus Inhibit Cancer Metastasis by Down-regulating Epithelial-Mesenchymal Transition in Hypoxia-Induced Human Hepatocellular Carcinoma Cells

引用

Chinese Journal of Integrative Medicine 2019年第5期25卷 334-341页

作者： QIAN Ya-yun SHI you-yang LU song-hua YANG Ting ZHAO xue-yu YAN Yan LI Wen-yuan LIU Yan-qing Institute of Traditional Chinese Medicine and Western Medicine School of MedicineYangzhou UniversityJiangsu Province(225009)China Jiangsu Key Laboratory of Integrated Traditional Chinese and Western Medicine for Prevention and Treatment of Senile Diseases YangzhouJiangsu Province(225001)China Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses Jiangsu Province(225009)China

Objective: To evaluate the effects of Celastrus Orbiculatus extracts(COE) on metastasis in hypoxiainduced hepatocellular carcinoma cells(Hep G2) and to explore the underlying molecular mechanisms. Methods:The effect of COE(160, 200 and 240 μg/mL) on cell viability, scratch-wound, invasion and migration were studied by 3-4,5-dimethyl-2-thiazolyl-2,5-diphenyl-2-H-tetrazolium bromide(MTT), scratch-wound and transwell assays, respectively. Co Cl2 was used to establish a hypoxia model in vitro. Effects of COE on the expressions of E-cadherin, vimentin and N-cadherin were investigated with Western blot and immuno?uorescence analysis,respectively. Results: COE inhibited proliferation and metastasis of hypoxia-induced hepatocellular carcinoma cells in a dose-dependent manner(P<0.01). Furthermore, the expression of epithelial-mesenchymal transition(EMT) related markers were also remarkably suppressed in a dose-dependent manner(P<0.01). In addition, the upstream signaling pathways, including the hypoxia-inducible factor 1α(Hif-1α) and Twist1 were suppressed by COE. Additionally, the Hif-1α inhibitor 3-5'-hydroxymethyl-2'-furyl)-1-benzylindazole(YC-1), potently suppressed cell invasion and migration as well as expression of EMT in hypoxia-induced Hep G2 cells. Similarly, the combined treatment with COE and YC-1 showed a synergistic effect(P<0.01) compared with the treatment with COE or YC-1 alone in hypoxia-induced Hep G2 cells. Conclusions: COE signi?cantly inhibited the tumor metastasis and EMT by suppressing Hif-1α/Twist1 signaling pathway in hypoxia-induced Hep G2 cell. Thus, COE might have potential effect to inhibit the progression of Hep G2 in the context of tumor hypoxia.

关键词： Celastrus Orbiculatus hepatocellular carcinoma antimetastasis epithelial-mesenchymal transition Hif-1α/Twist1 signaling pathway

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

Fatigue Behavior of Dissimilar Al–Mg–Si/Al–Zn–Mg Aluminum Alloys Friction Stir Welding Joints

引用

Acta Metallurgica Sinica(English Letters) 2016年第12期29卷 1161-1168页

作者： Zhong-Jie Yan xue-song Liu Hong-Yuan Fang State Key Laboratory of Advanced Welding and Joining Harbin Institute of Technology

In this study, fatigue properties and fracture mechanism of dissimilar Al-Mg-Si/Al-Zn-Mg aluminum alloys friction stir welding （FSW） joints were investigated and the effect of the sheet configuration on the fatigue behavior of the FSW joints was also discussed. Results showed that the joints owned better fatigue properties when the Al-Zn-Mg aluminum alloy was placed at the advancing side （AS）. At 107 cycles, the fatigue strengths of Al-Zn-Mg-AS and Al-Mg- Si-AS joints were, respectively, 105.6 and 90.1 MPa. All joints fractured at the heat-affected zone at the Al-Mg-Si alloy side. Transmission electron microscopy results showed that better fatigue property of the Al-Zn-Mg-AS joint was associated with the bridging effect of the bigger secondary phase particles.

关键词： Fatigue behavior Friction stir welding Al-Mg-Si/Al-Zn-Mg aluminum alloys Secondaryphase particle

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

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：