检索结果-南通市图书馆

Accurate analysis of limiting human dose of non-lethal laser weapons

Defence Technology（防务技术） 2022年第4期18卷 678-688页

作者： Chen-yang lyu Ren-jun Zhan College of Equipment Management and Support Chinese People’s Armed Police Force Engineering UniversityXi’an710086ShaanxiChina

In order to maximize the lethality and reversibility of the non-lethal laser weapons(NLLW) at the same time and thus provide a theoretical basis for the R&D of laser weapons in the future,this paper accurately analyzed the limiting biological dose of irreversible damage to human skin caused by the NLLW.Firstly,based on the burn theory in medicine and the actual tactical background,this paper redefines the evaluation criteria of the limiting laser dose of NLLW to the human body.Secondly,on the basis of anatomical knowledge,a 5-layer finite element model(FEM) of superficial skin is proposed,constructed and verified,which can accurately describe the limiting reversible damage.Based on the optimized Pennes bioheat transfer equation,the diffusion approximation theory,the modified Beer-Lambert law,the Arrhenius equation,and combined with dynamic thermophysical parameters,this paper highly restored the temperature distribution and accurately solved the necrotic tissue distribution inside the human skin irradiated by 1064 nm laser.Finally,it is concluded that the maximum human dose of the1064 nm NLLW is 8.93 J/cm^(2),8.29J/cm^(2),and 8.17 J/cm^(2) when the light spots are 5 mm,10 mm and15 mm,respectively,and the corresponding output power of the weapon is 46.74 W,173.72 W and384.77 W.Simultaneously,the temperature and damage distribution in the tissue at the time of ultimate damage are discussed from the axial and radial dimensions,respectively.The conclusions and analysis methods proposed in this paper are of great guiding significance for future research in military,medical and many other related fields.

关键词： Laser weapon Non-lethal Limit dose Tissue optics Bioheat transfer Finite element

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

Influences of Floater Motion on Gap Resonance Triggered by Focused Wave Groups

引用

中国海洋工程:英文版 2023年第4期37卷 685-697页

作者： GAO jun-liang lyu Jing ZHANG Jian ZANG jun School of Naval Architecture and Ocean Engineering Jiangsu University of Science and TechnologyZhenjiang 212100China Key Laboratory of Port Waterway and Sedimentation Engineering of MOTNanjing Hydraulic Research InstituteNanjing 210029China Key Laboratory of Water Security Guarantee in Guangdong-Hong Kong-Marco Greater Bay Area of Ministry of Water Resources Guangzhou 510611China Centre for Infrastructure Geotechnical and Water Engineering(IGWE)Department of Architecture and Civil EngineeringUniversity of BathBA27AYUK

The current study investigates the hydrodynamic characteristics of gap resonance within a narrow gap formed by two adjacent boxes subjected to incident focused transient wave groups.A two-dimensional(2D)numerical wave tank based on the OpenFOAM package is utilized for this purpose.The weather-side box is fixed while the lee-side box is allowed to heave freely under wave actions.The effects of the focused wave amplitude and spectral peak period on the wave amplification within the gap,motion of the lee-side box,and wave forces(including horizontal and vertical wave forces)acting on each box are systematically examined.For comparison,another structural layout consisting of two fixed boxes is also considered.The results reveal that the release of the heave degree of freedom(DoF)of the lee-side box results in remarkably distinct resonance features.In the heave-box system,both its fluid resonant period and the period corresponding to the maximum heave displacement of the lee-side box are significantly larger(i.e.,1.6-1.7 times)than the fluid resonant period of the fixed-box system.However,the wave amplification factor inside the gap in the heave-box system is significantly lower than that in the fixed-box one.Both the variations of the maximum horizontal and vertical wave forces with the spectral peak period and their magnitudes are also significantly different between the two structural systems.

关键词： gap resonance focused waves wave amplification wave forces OpenFOAM

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

Current Progress and Challenges to Tobacco Control in China

引用

China CDC weekly 2022年第6期4卷 101-105页

作者： Dong Sun Yuanjie Pang jun lyu Liming Li Department of Epidemiology&Biostatistics School of Public HealthPeking UniversityBeijingChina Peking University Center for Public Health and Epidemic Preparedness&Response BeijingChina

In May 2003,the World Health Organization(WHO)Framework Convention on Tobacco Control(FCTC)was released(1),which is an event of great significance in the history of tobacco control.The FCTC was signed by China in November 2003 and entered into force in January 2006.Although some achievements in tobacco control have been made over the past 15 years,much more progress is needed.In July 2021,the WHO Report on the Global Tobacco Epidemic(Report)was released.The Report evaluates and grades implementation of the 6 most effective strategies of the Monitor,Protect,Offer,Warn,Enforce and Raise(MPOWER)tobacco control package in 61 high-income countries,105 middleincome countries,and 29 low-income countries(2)(Table 1).This article summarizes current progress and challenges to tobacco control in China with reference to the Report.

关键词： income control

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

Infrasonic waves generated from the volcano eruption in Tonga

引用

Chinese Journal of Acoustics 2022年第1期41卷 95-98页

作者： CHENG Wei TENG Pengxiao LYU Jun ZHANG Tianyu Institute of Acoustics Chinese Academy of SciencesBeijing 100190 Key Laboratory of Noise and Vibration Research Chinese Academy of SciencesBeijing 100190 University of Chinese Academy of Sciences Beijing 100049

The Hunga-Tonga-Hunga-Ha’apai volcano in Tonga erupted violently on January 15,2022.After 8 hours and 39 minutes,an infrasound array in Kunming at a distance of 10151 km away from the volcano recorded a sequence of strong infrasonic waves.The average period of the first four infrasonic waves is 443 s with propagation speed of 321 m/s.The azimuth angle of this event has been estimated by applying the progressive multi-channel correlation(PMCC)method to process the received signals.During continuous monitoring,the infrasonic waves propagating along and opposite to the direction towards the Kunming array around the earth are recorded respectively.

关键词： volcano eruption record

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

Research methods and influencing factors of interfacial heat transfer during sub-rapid solidification process of strip casting

引用

Journal of Iron and Steel Research(International) 2022年第1期29卷 3-16页

作者： Wan-lin Wang Cheng Lu Le-jun Zhou Pei-sheng lyu School of Metallurgy and Environment Central South UniversityChangsha 410083HunanChina National Center for International Research of Clean Metallurgy Central South UniversityChangsha 410083HunanChina

Interfacial heat transfer behavior between the molten steel and twin-rolls is a key issue in the strip casting process,and it has already attracted wide attention from industrial and academic communities of steel.The research methods and influencing factors on the interfacial heat transfer were summarized.Numerical simulation models,semi-industrial scale,and laboratory equipment have been developed in this field,and these methods were also improved by worldwide researchers based on the development of computer,automatic,and visual technologies.Coating properties,naturally deposited film,and casting parameters are the main factors which affect the heat transfer significantly.Although lots of research has been carried out,the internal relations among these influencing factors,interfacial heat transfer,and the quality of the strip are still worth to be further explored.Keywords Strip casting Interfacial heat transfer Simulation method Coating property Naturally deposited film Casting parameter.

关键词： Strip casting Interfacial heat transfer Simulation method Coating property Naturally deposited film Casting parameter

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

Functional characterization of piggyBac-like elements from Nilaparvata lugens(St?l)(Hemiptera:Delphacidae)

引用

Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2022年第6期23卷 515-527页

作者： jun lyu Qin SU Jinhui LIU Lin CHEN Jiawei SUN Wenqing ZHANG State Key Laboratory of Biocontrol School of Life SciencesSun Yat-sen UniversityGuangzhou 510275China

Piggy Bac is a transposable DNA element originally discovered in the cabbage looper moth(Trichoplusia ni).The T.ni piggyBac transposon can introduce exogenous fragments into a genome,constructing a transgenic organism.Nevertheless,the comprehensive analysis of endogenous piggyBac-like elements(PLEs)is important before using piggyBac,because they may influence the genetic stability of transgenic lines.Herein,we conducted a genome-wide analysis of PLEs in the brown planthopper(BPH)Nilaparvata lugens(St?l)(Hemiptera:Delphacidae),and identified a total of 28 PLE sequences.All N.lugens piggy Bac-like elements(NlPLEs)were present as multiple copies in the genome of BPH.Among the identified NlPLEs,NlPLE25 had the highest copy number and it was distributed on five chromosomes.The full length of NlPLE25 consisted of terminal inverted repeats and sub-terminal inverted repeats at both terminals,as well as a single open reading frame transposase encoding546 amino acids.Furthermore,NlPLE25 transposase caused precise excision and transposition in cultured insect cells and also restored the original TTAA target sequence after excision.A cross-recognition between the NlPLE25 transposon and the piggy Bac transposon was also revealed in this study.These findings provide useful information for the construction of transgenic insect lines.

关键词： Nilaparvata lugens piggyBac-like elements Transposon NlPLE25

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 survey of safety separation management and collision avoidance approaches of civil UAS operating in integration national airspace system

引用

Chinese Journal of Aeronautics 2020年第11期33卷 2851-2863页

作者： Xiangmin GUAN Renli lyu Hongxia SHI jun CHEN Department of General Aviation Civil Aviation Management Institute of ChinaBeijing 100102China General Aviation Institute of Zhejiang JianDe Hangzhou 311600China School of Engineering and Materials Science Queen Mary University of LondonLondon E14NSUnited Kingdom

Recent years have witnessed a booming of the industry of civil Unmanned Aircraft System(UAS).As an emerging industry,the UAS industry has been attracting great attention from governments of all countries and the aviation industry.UAS are highly digitalized,informationized,and intelligent;therefore,their integration into the national airspace system has become an important trend in the development of civil aviation.However,the complexity of UAS operation poses great challenges to the traditional aviation regulatory system and technical means.How to prevent collisions between UASs and between UAS and manned aircraft to achieve safe and efficient operation in the integrated operating airspace has become a common challenge for industry and academia around the world.In recent years,the international community has carried out a great amount of work and experiments in the air traffic management of UAS and some of the key technologies.This paper attempts to make a review of the UAS separation management and key technologies in collision avoidance in the integrated airspace,mainly focusing on the current situation of UAS Traffic Management(UTM),safety separation standards,detection system,collision risk prediction,collision avoidance,safety risk assessment,etc.,as well as an analysis of the bottlenecks that the current researches encountered and their development trends,so as to provide some insights and references for further research in this regard.Finally,this paper makes a further summary of some of the research highlights and challenges.

关键词： Air transportation Collision avoidance Safety Separation control Unmanned aircraft system

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

Ultrahigh-fidelity spatial mode quantum gates in high-dimensional space by diffractive deep neural networks

引用

Light(Science & Applications) 2024年第1期13卷 55-67页

作者： Qianke Wang jun Liu Dawei lyu Jian Wang Wuhan National Laboratory for Optoelectronics and School of Optical and Electronic Information Huazhong University of Science and TechnologyWuhan430074HubeiChina Optics Valley Laboratory Wuhan430074HubeiChina

While the spatial mode of photons is widely used in quantum cryptography, its potential for quantum computation remains largely unexplored. Here, we showcase the use of the multi-dimensional spatial mode of photons to construct a series of high-dimensional quantum gates, achieved through the use of diffractive deep neural networks (D2NNs). Notably, our gates demonstrate high fidelity of up to 99.6(2)%, as characterized by quantum process tomography. Our experimental implementation of these gates involves a programmable array of phase layers in a compact and scalable device, capable of performing complex operations or even quantum circuits. We also demonstrate the efficacy of the D2NN gates by successfully implementing the Deutsch algorithm and propose an intelligent deployment protocol that involves self-configuration and self-optimization. Moreover, we conduct a comparative analysis of the D2NN gate’s performance to the wave-front matching approach. Overall, our work opens a door for designing specific quantum gates using deep learning, with the potential for reliable execution of quantum computation.

关键词： quantum dimensional operations

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

SCIM: Incorporating secure communication and interference management in one operation

引用

Digital Communications and Networks 2023年第2期9卷 512-522页

作者： Zhao Li Pintian lyu jun Li Zhixian Chang Jia Liu Zheng Yan School of Cyber Engineering Xidian UniversityXi'an710126China Technol.on Commun.Net.Lab The 54th Research Inst.of China Elec.Technol.Group CorpShijiazhuang050081China School of Telecommun.and Inf.Engineering Xi'an University of Posts&TelecommunXi'an710071China School of Computer Science and Technology Xidian UniversityXi'an710126China The Department of Comnet Aalto UniversityEspoo02150Finland

Due to the broadcast nature of wireless communications,users’data transmitted wirelessly is susceptible to security/privacy threats.Meanwhile,as a result of the limitation of spectrum resources,massive wireless connections will incur serious interference,which may damage the efficiency of data transmission.Therefore,improving both efficiency and secrecy of data transmission is of research significance.In this paper,we propose a wireless transmission scheme by taking both Secure Communication(SC)and Interference Management(IM)into account,namely SCIM.With this scheme,an SCIM signal is generated by the legitimate transmitter(Tx)and sent along with the desired signal,so that the SCIM signal can interact with and suppress the environmental interference at the legitimate receiver(Rx).Meanwhile,the SCIM signal may interfere with the eavesdropper in the coverage of legitimate transmission so as to deteriorate the eavesdropping performance.Therefore,the secrecy of desired transmission is improved.In this way,both the transmission efficiency and privacy are enhanced.Then,by taking various transmission preferences into account,we develop different implementations of SCIM,including Interference Suppression First SCIM(ISF-SCIM),Data Transmission First SCIM(DTF-SCIM),Anti-Eavesdropping First SCIM(AEF-SCIM),and Secrecy Rate Maximization SCIM(SRM-SCIM).Our in-depth simulation results have shown the proposed methods to effectively improve the efficiency and secrecy of the legitimate transmission.

关键词： Physical-layer security Secure communication Anti-eavesdropping Interference management Secrecy rate

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

Study on Transient Gap Resonance with Consideration of the Motion of Floating Body

引用

China Ocean Engineering 2022年第6期36卷 994-1006页

作者： GAO jun-liang lyu Jing WANG Jing-hua ZHANG Jian LIU Qian ZANG jun ZOU Tao School of Naval Architecture and Ocean Engineering Jiangsu University of Science and TechnologyZhenjiang 212100China Key Laboratory of Port Waterway and Sedimentation Engineering of MOTNanjing Hydraulic Research InstituteNanjing 210029China Department of Civil and Environmental Engineering the Hong Kong Polytechnic UniversityHong KongChina Centre for Infrastructure Geotechnical and Water Engineering(IGWE)Department of Architecture and Civil EngineeringUniversity of BathBA27AYU.K Shandong Provincial Key Laboratory of Ocean Engineering Qingdao 266100China

In this paper, the transient fluid resonance phenomenon inside a narrow gap between two adjacent boxes excited by the incident focused waves with various spectral peak periods and focused wave amplitudes is simulated by utilizing the open-sourced computational fluid dynamics software, Open FOAM. The weather-side box is allowed to heave freely under the action of waves, and the lee-side box keeps fixed. This paper mainly focuses on how both the spectral peak period and the focused wave amplitude affect the free-surface amplification inside the gap, the motion of the weather-side box, and the wave loads(including the vertical and the horizontal wave forces) acting on both boxes.For comparison, another two-box system with both boxes fixed is also considered as a control group. It is found that the motion of the weather-side box significantly changes the characteristics of the transient gap resonance, and it would cause that the fluid resonant period becomes 1.4-1.6 times that of the two-box system with both boxes fixed.All the concerned physical quantities(i.e., the free-surface amplification in the gap, the motion of the weather-side box, the wave loads) are found to closely depend on both the spectral peak period and the focused wave amplitude.

关键词： transient gap resonance focused waves free-surface amplification wave loads heave motion OpenFOAM

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：