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A simulation method on target strength and circular SAS imaging of Xrudder UUV including multiple acoustic scattering

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Defence Technology（防务技术） 2023年第5期23卷 214-228页

作者： wenhuan wang Bin wang Jun Fan Fulin Zhou Kaiqi Zhao Zhou Jiang School of Naval Architecture Ocean&Civil EngineeringShanghai Jiao Tong UniversityShanghai 200240PR China Key Laboratory of Marine Intelligent Equipment and System of Ministry of Education Shanghai Jiao Tong UniversityShanghai 200240PR China Shanghai Acoustics Laboratory Chinese Academy of SciencesShanghai 200240PR China

Target strength(TS)and circular synthetic aperture sonar(CSAS)images provide essential information for active acoustic detection and recognition of non-cooperative unmanned undersea vehicles(UUVs),which pose a significant threat to underwater preset *** access them,we propose an iterative physical acoustics(IPA)-based method to simulate the multiple acoustic scattered fields on rigid surfaces in high-frequency *** uses the Helmholtz integral equation with an appropriate Green's function in terms of the Neumann series,and then incorporates the ideas of triangulation and iteration into a numerical *** two approximate analytic formulae with precise physical meanings are derived to predict the TS and CSAS images of concave targets,*** are no restrictions on the surface's curvature and the order of multiple *** method is validated against the finite element method(FEM)for acoustic scattering from a sphere segment and against an experiment involving an X-rudder UUV's *** this basis,we simulate and analyze the TS and CSAS images of an X-rudder *** addition,the influence of the angle of adjacent rudders on the multiple scattering characteristics is *** show that this method can potentially predict accurate UUV features,especially the multiple scattered features.

关键词： Multiple acoustic scattering Target strength(TS) Circular synthetic aperture sonar(CSAS) X-rudder unmanned undersea vehicle (UUV) Iterative physical acoustics(IPA)

Inherently radiopaque polyurethane beads as potential multifunctional embolic agent in hepatocellular carcinoma therapy

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Journal of Materials Science & Technology 2021年第4期63卷 106-114页

作者： wenhuan wang Lin Sang Yiping Zhao Zhiyong Wei Min Qi Yang Li State Key Laboratory of Fine Chemicals Liaoning Key Laboratory of Polymer Science and EngineeringDepartment of Polymer Science and EngineeringSchool of Chemical EngineeringDalian University of TechnologyDalian 116024China School of Automotive Engineering Dalian University of TechnologyDalian 116024China Department of Radiology Second Affiliated Hospital of Dalian Medical UniversityDalian 116027China School of Material Science and Engineering Dalian University of TechnologyDalian 116024China

The aim of the current study is to report an inherently radiopaque drug-eluted beads(DEBs)as promising embolic materials for TACE ***,the synthesized radiopaque iodinated polycaprolactonepolyurethanes(I-PCLUs)are synthesized by chain-extending method by using 4,4-′isopropylidinedi-(2,6-diiodophenol)(IBPA)as the radiopacifying ***,doxorubicin(Dox)is introduced as a chemotherapeutic agent into I-PCLU beads via a double emulsification(W/O/W)*** drug loading and controlled release behavior of two ratios of I-PCLU/Dox are found to be dependent upon the internal porous microstructure,and the radiopacity is well-retained after four weeks drug ***,the I-PCLU/Dox beads exhibit positive in vitro anti-tumor *** in vivo intramuscular implantation and liver embolization results demonstrate that I-PCLU beads have good histocompatibility,occlusion effect and X-ray ***,the drug-loaded I-PCLU beads are performed into a VX2 rabbit hepatocellular carcinoma(HCC)model using a micro-catheter,form embolization of hepatic arteries and inhibit the tumor growth after one week ***,this polymeric system provides a potential radiopaque chemoembolization candidate for HCC and other cancer therapies,which could bring opportunities to the next generation of multifunctional embolic agents.

关键词： embolic hepatocellular rabbit

MII:A Novel Text Classification Model Combining Deep Active Learning with BERT

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Computers, Materials & Continua 2020年第6期63卷 1499-1514页

作者： Anman Zhang Bohan Li wenhuan wang Shuo Wan Weitong Chen College of Computer Science and Technology Nanjing University of Aeronautics and AstronauticsNanjing211106China Key Laboratory of Safety-Critical Software Ministry of Industry and Information TechnologyNanjing211106China Collaborative Innovation Center of Novel Software Technology and Industrialization Nanjing210046China School of Information Technology and Electrical Engineering University of QueenslandQueenslandAustralia

Active learning has been widely utilized to reduce the labeling cost of supervised *** selecting specific instances to train the model,the performance of the model was improved within limited ***,rare work paid attention to the effectiveness of active learning on *** this paper,we proposed a deep active learning model with bidirectional encoder representations from transformers(BERT)for text *** takes advantage of the self-attention mechanism to integrate contextual information,which is beneficial to accelerate the convergence of *** for the process of active learning,we design an instance selection strategy based on posterior probabilities Margin,Intra-correlation and Inter-correlation(MII).Selected instances are characterized by small margin,low intra-cohesion and high *** conduct extensive experiments and analytics with our *** effect of learner is compared while the effect of sampling strategy and text classification is assessed from three real *** results show that our method outperforms the baselines in terms of accuracy.

关键词： Active learning instance selection deep neural network text classification

In-chain functionalization through the combination of ring opening copolymerization and oxime "Click" reaction towards X-ray opaque polylactide copolymers

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Chinese Chemical Letters 2020年第2期31卷 551-553页

作者： wenhuan wang Lin Sang Weizong Kong Yiping Zhao Zhiyong Wei Yang Li State Key Laboratory of Fine Chemicals Liaoning Key Laboratory of Polymer Science and EngineeringDepartment of Polymer Science and EngineeringSchool of Chemical EngineeringDalian University of TechnologyDalian 116024China School of Automotive Engineering Dalian University of TechnologyDalian 116024China Department of Gastroenterology Affiliated Zhongshan Hospital of Dalian UniversityDalian 116001China Department of Radiology Second Affiliated Hospital of Dalian Medical UniversityDalian 116027China

X-ray imaging functionalization of biodegradable polyesters is a great demand and challenge in biomedical *** this work,a strategy of in-chain functionalization through the combination of ring opening copolymerization and oxime "Click" postfunctionalization was developed towards X-ray opaque polylactide copolymers.A functionalized cyclic carbonate was first synthesized and used as comonomer of polylactide copolymers,which were subjected to postfunctionalization of oxime "Click" reaction towards iodinated polylactide *** chemical structure and physical properties of the target products were traced and *** vitro cytotoxicity evaluation with 3T3-Swiss albino by Alamar blue demonstrated a low *** X-ray radiopacity was analyzed by Micro-CT and quantified by Hounsfield Units value,which could be tailorable by the *** is a promising X-ray visible implantable biomaterial in biomedical applications.

关键词： Polylactide X-ray radiopacity Iodinated polymer Oxime"Click"reaction In-chain functionalization

The oral microbiome of pregnant women facilitates gestational diabetes discrimination

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Journal of Genetics and Genomics 2021年第1期48卷 32-39页

作者： Xiaoqing Li Jiayong Zheng Xiuling Ma Bing Zhang Jinyang Zhang wenhuan wang Congcong Sun Yeping wang Jianqiong Zheng Haiying Chen Jiejing Tao Hai wang Fengyi Zhang Jinfeng wang Hongping Zhang Wenzhou People’s Hospital/Wenzhou Maternal and Child Health Care Hospital/The Third Clinical Institute Affiliated to Wenzhou Medical University Wenzhou 325000China Computational Genomics Lab Beijing Institutes of Life ScienceChinese Academy of SciencesBeijing 100101China University of Chinese Academy of Sciences Beijing 100049China

The oral microbiota plays an important role in the development of various diseases,whereas its association with gestational diabetes mellitus (GDM) remains largely *** aim of this study is to identify biomarkers from the oral microbiota of GDM patients by analyzing the microbiome of the saliva and dental plaque samples of 111 pregnant *** find that the microbiota of both types of oral samples in GDM patients exhibits differences and significantly varies from that of patients with periodontitis or dental *** bacterial biomarkers from the oral microbiota,GDM classification models based on support vector machine and random forest algorithms are *** area under curve (AUC) value of the classification model constructed by combination of Lautropia and Neisseria in dental plaque and Streptococcus in saliva reaches 0.83,and the value achieves a maximum value of 0.89 by adding clinical *** findings suggest that certain bacteria in either saliva or dental plaque can effectively distinguish women with GDM from healthy pregnant women,which provides evidence of oral microbiome as an informative source for developing noninvasive biomarkers of GDM.

关键词： Gestational diabetes mellitus Oral microbiome Saliva Dental plaque Classification model

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化学吸附储热技术的研究现状及进展

材料导报 2018年第23期32卷 4107-4115,4124页

作者：闫霆王文欢王如竹上海电力学院能源与机械工程学院上海200090 上海交通大学机械与动力工程学院上海200240

化学吸附储热技术具有储热密度高、长时间储热几乎无热损失且可以实现冷热的复合储存等优点,在太阳能等可再生能源的有效利用和中低温余热/废热的回收利用中具有良好的应用前景,已成为国内外的研究热点。本文针对无机盐与水蒸气的水合... 详细信息

化学吸附储热技术具有储热密度高、长时间储热几乎无热损失且可以实现冷热的复合储存等优点,在太阳能等可再生能源的有效利用和中低温余热/废热的回收利用中具有良好的应用前景,已成为国内外的研究热点。本文针对无机盐与水蒸气的水合反应和金属氯化物等与氨气的络合反应两类化学吸附储热方式进行了系统综述,归纳和总结了化学吸附储热技术的研究现状以及最新进展。对化学吸附储热材料进行了概括,并且对典型的化学反应器以及吸附储热装置进行了回顾。基于研究现状的分析,阐述了化学吸附储热当前研究中存在的问题,并进一步指出了该技术未来需要克服的问题和研究方向。

关键词：吸附储热技术太阳能可再生能源回收化学反应器

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化学储热技术的研究现状及进展

化工进展 2018年第12期37卷 4586-4595页

作者：闫霆王文欢王程遥上海电力学院能源与机械工程学院上海200090

化学储热技术通过可逆的化学反应来存储和释放热能,其储热密度远高于显热储存和相变热储存,不仅可以对热能进行长期储存几乎无热损失,而且可以实现冷热的复合储存,因而在余热/废热回收及太阳能的利用等方面都具有广阔的应用前景。本文... 详细信息

化学储热技术通过可逆的化学反应来存储和释放热能,其储热密度远高于显热储存和相变热储存,不仅可以对热能进行长期储存几乎无热损失,而且可以实现冷热的复合储存,因而在余热/废热回收及太阳能的利用等方面都具有广阔的应用前景。本文将化学储热分为浓度差热储存、化学吸附热储存和化学反应热储存3类,并针对上述分类的特点及其应用,对化学储热技术进行了系统的归纳。其中主要概括了目前广为关注、有前景的储热材料,总结了化学储热技术当前的研究现状以及最新进展,并且回顾了将化学储热技术应用于储热研究的试验系统。同时,基于研究现状的分析,指出了此项技术需要进一步研究和解决的相关问题,以期为化学储热技术的发展和走向实际应用提供有价值的借鉴和参考。

关键词：化学储热储热密度太阳能吸附化学反应长期储存

Research on the Impact of Distributed Generation on Relay Protection and Its Standards

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Electricity 2014年第5期25卷 51-58页

作者： Yang Guosheng Zhou Zexin Li Wei Liu Yu Liu Yadong wang Xiaoyang wang wenhuan China Electric Power Research Institute National Power Dispatching and Control Center

Distributed generation(DG) will change characteristics of power flow and faults of traditional distribution network as well as the network operation mode, especially the operation of relay protection and automatic circuit breaker re-closing. In this paper, the characteristics and influences of several types of distributed generation and connection pattern, relay protection and automatic circuit breaker re-closing are analyzed. Standards of relay protection when distributed generation access to distribution network are discussed as well.

关键词： distributed generation distribution network relay protection standards

提高薄互层低渗透砂岩油藏采收率的有效开发技术

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石油与天然气地质 2006年第5期27卷 660-667,674页

作者：王文环中国石油化工股份有限公司石油勘探开发研究院北京100083

以胜利油田纯41块沙河街组沙四段薄互层低渗透油藏为例,从低渗透油田渗流机理出发,分析了低渗透油田由于存在井距偏大、井网与裂缝匹配不佳、没能适时转注、油藏保护意识薄弱等问题对开发效果的影响。应用渗流机理、地应力场研究成果,... 详细信息

以胜利油田纯41块沙河街组沙四段薄互层低渗透油藏为例,从低渗透油田渗流机理出发,分析了低渗透油田由于存在井距偏大、井网与裂缝匹配不佳、没能适时转注、油藏保护意识薄弱等问题对开发效果的影响。应用渗流机理、地应力场研究成果,提出了低渗透砂岩油藏合理井距确定、井网形式优化、适时增压注水、加强油藏保护等配套开发技术。实施后日产油量、采油速度、日注水量明显提高,含水率、注入压力下降,预测采收率可提高5．23%。因此,该项配套技术对改善该类低渗透油藏开发效果、提高采收率具有广泛的使用意义。

关键词：最小启动压力梯度非线性流动区技术极限井距经济合理井距低渗透砂岩油藏