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Modeling of bistatic scattering from an underwater non-penetrable target using a Kirchhoff approximation method

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Defence Technology（防务技术） 2022年第7期18卷 1097-1106页

作者： Bin wang wen-huan wang Jun Fan Kai-qi Zhao Fu-lin Zhou Li-wen Tan Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration State Key Laboratory of Ocean EngineeringShanghai Jiao Tong UniversityShanghai200240China

A numerical triangulation and transformation into the time domain of a Kirchhoff approximation(KA)method is proposed for the modeling of bistatic scattering from an underwater non-penetrable *** time domain solution in this approximation can be split up into two parts:the solution of reflected field,contributing around the specular direction,and the solution of shadow radiation,contributing around the forward *** average solution in the time domain satisfying the reciprocity principle is *** solution is expressed in terms of non-singular *** proposed method is validated against a normal mode method for bistatic scattering from a rigid ***,the reflected and shadow highlights on the surface of the sphere are shown to verify the integration surface of the reflected field and shadow *** is also tested against a finite element method and an experiment involving a scaled Benchmark Target Strength Simulation Submarine *** time-angle bistatic spectra for the model are evaluated by the direct and transformed average solutions of KA,and the former accelerates its speed of *** results are good,and show that this method can be used to predict the bistatic scattered field of a non-penetrable target.

关键词： Kirchhoff approximation Bistatic scattering Time domain Reciprocity Experiment

A Survey on Blocking Technology of Entity Resolution

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Journal of Computer Science & Technology 2020年第4期35卷 769-793页

作者： Bo-Han Li Yi Liu An-Man Zhang wen-huan wang Shuo Wan College of Computer Science and Technology Nanjing University of Aeronautics and AstronauticsNanjing 211106China Key Laboratory of Safety-Critical Software Ministry of Industry and Information TechnologyNanjing 211106China Collaborative Innovation Center of Novel Software Technology and Industrialization Nanjing 210000China

Entity resolution(ER)is a significant task in data integration,which aims to detect all entity profiles that correspond to the same real-world *** to its inherently quadratic complexity,blocking was proposed to ameliorate ER,and it offers an approximate solution which clusters similar entity profiles into blocks so that it suffices to perform pair-wise comparisons inside each block in order to reduce the computational cost of *** paper presents a comprehensive survey on existing blocking *** summarize and analyze all classic blocking methods with emphasis on different blocking construction and optimization *** find that traditional blocking ER methods which depend on the fixed schema may not work in the context of highly heterogeneous information *** to use schema information flexibly is of great significance to efficiently process data with the new features of this *** learning is an important tool for ER,but end-to-end and efficient machine learning methods still need to be *** also sum up and provide the most promising trend for future work from the directions of real-time blocking ER,incremental blocking ER,deep learning with ER,etc.

关键词： blocking construction blocking optimization data linkage entity resolution

Mechanically flexible V_(3)S_(4)@carbon composite fiber as a high-capacity and fast-charging anode for sodium-ion capacitors

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Rare Metals 2023年第8期42卷 2633-2642页

作者： Zhi-Fei Mao Xiao-Jun Shi Tao-Qiu Zhang Peng-Ju Liang Rui wang Jun Jin Bei-Bei He Yan-Sheng Gong Qiang wang Xi-Li Tong huan-wen wang Faculty of Material Science and Chemistry China University of GeosciencesWuhan 430074China Engineering Laboratory of Chemical Resources Utilization in South Xinjiang of XPCC Department of Chemistry and Chemical EngineeringCollege of LifeTarim UniversityAlar 843300China State Key Laboratory of Coal Conversion Institute of Coal ChemistryChinese Academy of SciencesTaiyuan 030001China

Hybrid Na-ion capacitors(NICs)have received considerable interests owing to their low-cost,high-safety,and rapidly charging energy-storage *** NICs are composed of a capacitor-type cathode and a battery-type *** major challenge for NICs is to search for suitable electrode materials to overcome the sluggish diffusion of Na^(+)in the ***,ultrafine vanadium sulfide is encapsulated in carbon fiber(V_(3)S_(4)@CNF)as a self-supported electrode by electrospinning and in situ *** carbon cladding and one-dimensional(ID)nanofiber network-like structure could alleviate the volume expansion of V_(3)S_(4)during Na^(+)de-/intercalation ***,the V_(3)S_(4)@CNF anode exhibited a pseudocapacitive sodium storage in terms of large Na^(+)-storage capacity(476 mAh·g^(-1)at 0.1A·g^(-1)),high-rate capability(290 mAh·g^(-1)at 20.0 A·g^(-1))and excellent cycling stability(95%capacity retention for1500 cycles at 2.0 A·g^(-1))in Na *** employing V_(3)S_(4)@CNF as the anode and the activated carbon(AC)cathode,the as-assembled NICs could deliver a high energy density of 110 Wh·kg^(-1)at a power density of200 W·kg^(-1).Even at a high power of 10,000 W·kg^(-1),the specific energy is still up to 42 Wh·kg^(-1).

关键词： Electrospinning Na-ion capacitor(NIC) Nanofibers Vanadium sulfide Fast-charging

Binder-induced ultrafast PF_(6)^(-)-intercalation toward a high-voltage,high-power and long-cycling zinc-graphite dual-ion battery

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Rare Metals 2024年第10期43卷 5017-5029页

作者： Gen Li Xiao-Jun Shi Ting Dong Qian Yu Zhi-Fei Mao Xin-Hua Liu Rui wang Bei-Bei He Jun Jin Yan-Sheng Gong huan-wen wang Engineering Research Center of Nano-Geomaterials of Ministry of Education Faculty of Material Science and ChemistryChina University of GeosciencesWuhan 430074China College of Resources and Environment South-Central Minzu UniversityWuhan430074China School of Transportation Science and Engineering Beihang UniversityBeijing 100191China

Metallic zinc is an ideal anode material owing to its high theoretical capacity(819 mAh·g^(-1)),ecofriendliness,low cost and high safety,which have driven fast development of Zn-ion batteries(ZIBs).However,the practical application of current ZIBs is significantly restricted by irregular dendrite growth of zinc anode and the low working voltage(usually<2 V)of cathode ***,we report a high-voltage Zn-based dualion battery(DIB),which is constructed by a graphite cathode,a Zn anode,and 3 M LiPF_(6)in the ethyl methyl carbonate(EMC)*** the corrosion interaction of Li^(+)ions,Zn^(2+)can be easily dissolved from Zn anode into the electrolyte to enable dendrite-free Zn^(2+)plating/stripping at the ***,an aqueous carboxymethyl cellulose(CMC)binder is employed to generate a robust cathode electrolyte interface(CEI)layer on the graphite cathode,which renders ultrafast PF_(6)^(-)-de-/intercalation into *** resultant Zn-graphite DIB operates stably at a high cut off voltage of 3.2 V,corresponding to an average output voltage of 2.2 *** 9000cycles at 5C,the high capacity retention of 95.9% can be achieved with~100% Coulomb *** on the mass of cathode material,our Zn-graphite battery exhibits ultrafast rate capability(60 C,a discharge time of 44 s)and high energy/power densities(208 Wh·kg^(-1)at 214 W·kg^(-1);142 Wh·kg^(-1)at 8692 W·kg^(-1)),which holds great promise for large-scale energy storage.

关键词： Zn-ion batteries PF_(6)^(-)-de-/intercalation Graphite Binder High-voltage

Study on Dispersion Polymerization Process of Silica Aerogel/Polystyrene Core-Shell Composite Particles

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材料科学研究（中英文版） 2013年第2期2卷 16-22页

作者： Gangqiang Geng Suqing wen huan wang Department of Materials Science and Engineering Chang'an University Xi'an 710064 China

Dual modulation of homogeneous nanomaterialization and electrochemical activation enhancing zinc ion storage

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Science China Chemistry 2025年第1期68卷 385-393页

作者： Jianwei wang huan wang Kangning wang wenhui wang wenlin Zhang Yanzhong Zhen School of Chemistry & Chemical Engineering Yan'an University

Vanadium-based electrode materials are widely investigated,but the low specific capacity and slow electrochemical kinetics in aqueous zinc-ion batteries still limit their commercial ***,the VS2/Ca V4O9material with the morphology of nanoflower was synthesized by a one-step hydrothermal *** to the blocky structure of pure VS2material,the VS2/Ca V4O9material is composed of thinner homogeneous *** open structures could provide abundant electrochemical active sites and ion transport channels,and then promote the electrochemical reaction *** addition,they can also buffer the bulk strain during the reaction *** improve the utilization of vanadium elements,an in-situ electrochemical activation strategy is used to explore the storage performance of the VS2/Ca V4O9material,the different activation voltage range of 0.4–1.6 and 0.4–1.4 V are selected,*** with the longer activation plateau of activated-VS2,the VS2/Ca V4O9cathode could quickly reach the activation state in the range of 1.4–1.6 V and cause the release of additional Zn storage sites *** VS2/Ca V4O9cathode delivers a higher power density of 37,000 W kg-1and a significant energy density of 423 Wh *** the high current density of 15 A g-1,the VS2/Ca V4O9cathode still has a discharge capacity of 183.9m Ah g-1after 5,000 cycles,and the capacity decay rate per cycle is only 0.0042%.Continuous cyclic voltammetry （CV） curves,electrochemical impedance spectroscopy （EIS） measurements,density functional theory （DFT） calculation and galvanostatic intermittent titration technique （GITT） measurements demonstrate that the VS2/Ca V4O9cathode has a faster ion diffusion/charge transfer ***,the assembled flexible device has an excellent mechanical stability.

关键词： dual modulation homogeneous nanomaterialization electrochemical activation zinc ion storage

比较贝伐单抗和MMC辅助小梁切除术效果的Meta分析

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国际眼科杂志 2016年第11期16卷 2030-2035页

作者：王越柯敏王文欢武汉大学中南医院眼科中国湖北省武汉市430071

目的：比较贝伐单抗与丝裂霉素C（ mitomycin C,MMC）辅助小梁切除术治疗青光眼的有效性和安全性。方法：计算机检索 PubMed、CBM、VIP、CNKI 和万方数据库,查找所有比较贝伐单抗与MMC辅助小梁切除术治疗青光眼效果的随机对照试验（ r... 详细信息

目的：比较贝伐单抗与丝裂霉素C（ mitomycin C,MMC）辅助小梁切除术治疗青光眼的有效性和安全性。方法：计算机检索 PubMed、CBM、VIP、CNKI 和万方数据库,查找所有比较贝伐单抗与MMC辅助小梁切除术治疗青光眼效果的随机对照试验（ randomized controlled trials, RCTs）,检索时限均为建库至2016-06-30。同时按纳入和排除标准由两名评价员独立进行RCT的筛选、资料提取和质量评价后,采用RevMan 5.3软件进行Meta分析。结果：共纳入4项研究,总计286眼（贝伐单抗组143眼, MMC组143眼）。 Meta分析结果显示：（1）有效性：贝伐单抗组与MMC组术后随访末次眼压（ intraocular pressure, IOP）（WMD=2.21,95% CI：-0.17-4.58,P=0.07）和手术完全成功率（OR=0.69,95% CI：0.26-1.81,P=0.45）均无统计学差异；两组患者随访末次抗青光眼药物使用数量（OR=0.12,95% CI：-0.15-0.39,P=0.39）相似,结果无统计学意义。（2）安全性：两组患者术后并发症发生率相同,无统计学差异,低眼压（OR=0.7,95% CI：0.12-4.05, P=0.69）、滤泡漏（OR=1,95% CI：0.21-4.74,P=1）、包囊型滤泡（OR=1.15,95% CI：0.38-3.44,P=0.81）、脉络膜脱离（OR=1.22,95% CI：0.29-5.22,P=0.78）和白内障（OR=1.15,95% CI：0.38-3.44,P=0.81）。结论：小梁切除术联合贝伐单抗与联合MMC治疗青光眼具有相似的疗效和安全性,贝伐单抗并不能更有效地降低眼压,临床医师应根据患者疾病特点选择适合药物辅助手术。

关键词：贝伐单抗小梁切除术青光眼 Meta分析

Structural stability and ion migration of Li_(2)MnO_(3) cathode material under high pressures

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Chinese Physics B 2023年第12期32卷 449-453页

作者：谢泽仁周思思贺贝贝王欢文公衍生金俊张祥功汪锐 Faculty of Materials Science and Chemistry China University of GeosciencesWuhan 430074China Wuhan Institute of Marine Electric Propulsion Wuhan 430064China

Some special fields,such as deep-sea exploration,require batteries and their electrode materials to withstand extremely high *** the cathode material has the highest energy density,Li-excess Mn-based materials are also likely to be utilized in such an ***,the effect of pressure on the crystal structure and migration barrier of this kind of material is still not clear at ***,in this study,we investigate the properties of the matrix material of Li-excess Mn-based material,Li_(2)MnO_(3),under high *** equation of state,bulk modulus,and steady-state volume of Li_(2)MnO_(3) are predicted by the method of first principles *** calculations of unit cells at different pressures reveal that the cell parameters suffer anisotropic compression under high *** compression,Li-O bond is more easily compressed than Mn-O *** results from the climbing image nudged elastic band(CINEB)method show that the energy barrier of Li^(+)migration in the lithium layer increases with pressure *** study can provide useful information for utilizing Li-excess Mn-based materials under high pressure.

关键词： lithium-ion battery Li_(2)MnO_(3) high pressure DFT computation

Experimental Study on Geometry Characteristics of Turbulent Premixed Flames for Natural Gas/Air Mixtures

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Journal of Thermal Science 2025年第1期34卷 268-282页

作者： ZHENG Weilin wang Qijiao XIAO Huahua CHEN Xiaoxiao XIE Fan ZENG wen Liaoning Key Lab of Advanced Test Technology for Aerospace Propulsion System Shenyang Aerospace University State Key Laboratory of Fire Science University of science and Technology of China AVIC Shenyang Aircraft Design and Research Institute

In this study,focusing on the geometry characteristics of spherical expanding flame,the turbulent premixed flames of natural gas/air mixtures were investigated in a fan-stirred turbulent *** effects of initial temperature（T=300-400 K）,initial pressure（P=0.1-0.3 MPa）,turbulence intensity（u'=1.0-2.7 m/s）,oxygen volumetric percentage(φ（O2）=15%-21%) and carbon dioxide volumetric percentage(φ（CO2）=0-20%)were delved *** flame profile under the Cartesian coordinate system was derived from the schlieren images taken by the high-speed ***,from both macroscopic and microscopic perspectives,the influence of experimental conditions on the flame geometry characteristics was explored through flame front extraction,wavelet decomposition and network *** results demonstrate that for significant flame wrinkling,changes in species concentrations and turbulence intensity have more pronounced effects on the flame wrinkling *** wrinkling of the flame front maintains a certain degree of similarity,as evidenced by the locally concentrated distribution of the angles of the maximum fluctuation *** disturbance energy under large-scale（D6-D8） disturbances exhibits relatively high values with a similar trend,exerting a significant impact on the geometry characteristics of the flame *** peaks of correlation degree are scattered either with the decomposition scale or the development of flame radius,indicating no linear correlation between different detail ***,the probability distribution of node degrees in key wrinkled regions exhibits different trends with that of large-scale wrinkling and disturbance energy,especially with changes in initial *** occurs because the number of key wrinkles varies based on the perturbation's strength or the region's ***,an increase in the fluctuation frequency of the flame's local radius may not necessarily lead to an increase in the number of key folded regions.

关键词： fan-stirred turbulent combustor geometry characteristics large-scale wrinkling network topology wavelet decomposition