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A highly reliable embedding algorithm for airborne tactical network virtualization

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Journal of Systems Engineering and Electronics 2021年第6期32卷 1364-1374页

作者： MIAO Jingcheng LYU Na CHEN Kefan CHEN Zhuo GAO Weiting College of Information and Navigation Air Force Engineering UniversityXi’an 710077China Unit 94860 of the PLA Nanjing 210000China

The evolution of airborne tactical networks(ATNs)is impeded by the network ossification *** a solution,network virtualization(NV)can provide a flexible and scalable architecture where virtual network embedding(VNE)is a key ***,existing VNE algorithms cannot be optimally adopted in the virtualization of ATN due to the complex interference in aircombat *** this context,a highly reliable VNE algorithm based on the transmission rate for ATN virtualization(TR-ATVNE)is proposed to adapt well to the specific electromagnetic environment of *** algorithm coordinates node and link *** the node mapping,transmission-rate resource is firstly defined to effectively evaluate the ranking value of substrate nodes under the interference of both environmental noises and enemy ***,a feasible splitting rule is proposed for path splitting in the link mapping,considering the interference between wireless *** results reveal that our algorithm is able to improve the acceptance ratio of virtual network requests while maintaining a high revenue-to-cost ratio under the complex electromagnetic interference.

关键词： airborne tactical network(ATN) network virtualization(NV) resource allocation virtual network embedding(VNE) transmission rate

Effects of cross-Kerr coupling on transmission spectrum of double-cavity optomechanical system

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Chinese Physics B 2024年第6期33卷 390-396页

作者：陈立滕秦立国田立君黄接辉周南润龚尚庆 School of Mathematics Physics and StatisticsShanghai University of Engineering ScienceShanghai 201620China Department of Physics Shanghai UniversityShanghai 200444China School of Electrical Engineering Shanghai University of Engineering ScienceShanghai 201620China School of Physics East China University of Science and TechnologyShanghai 200237China

We theoretically study the transmission spectrum of the cavity field in a double-cavity optomechanical system with cross-Kerr(CK) effect. The system consists of two tunneling coupling optomechanical cavities with a mechanical resonator as a coupling interface. By doping CK medium into the mechanical resonator, CK couplings between the cavity fields and the mechanical resonator are introduced. We investigate the effects of CK coupling strength on the transmission spectrum of the cavity field, including the transmission rate, nonreciprocity and four-wave mixing(FWM). We find that the transmission spectrum of the probe field can show two obvious transparent windows, which can be widened by increasing the CK coupling strength. For the transmission between the two cavity fields, the perfect nonreciprocity and reciprocity are present and modulated by CK coupling and phase difference between two effective optomechanical couplings. In addition, the effects of the optomechanical and CK couplings on FWM show that the single peak of FWM is split into three symmetrical peaks due to the introduction of the CK effect.

关键词： cross-Kerr transmission rate nonreciprocity four-wave mixing

Research on the Pressure Regulator Effect on a Pneumatic Vibration Isolation System

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Chinese Journal of Mechanical Engineering 2022年第6期35卷 275-285页

作者： Yan Shi Shaofeng Xu Zhibo Sun Yulong Nie Yixuan Wang School of Automation Science and Electrical Engineering Beihang UniversityBeijing 100191China School of Mechanical Engineering Inner Mongolia University of Science and TechnologyBaotou 014010China Engineering Training Center Beihang UniversityBeijing 100191China

The pneumatic vibration isolator(PVI)plays an increasingly important role in precision *** this paper,aiming to detect the performance of the pressure regulator in the PVI system,a PVI testing system with a pressure regulator is designed and ***,the structure of the pneumatic spring is presented and analyzed,and the nonlinear stiffness is obtained based on the ideal gas model and material ***,according to the working principle and continuity equations of ideal airflow,a dynamic model of the PVI system with a pressure regulator is *** the simulation analysis,the vibration isolation performance is improved with the efficient and precise pressure *** average values of both the vibration velocity and transmission rate decrease when the vibration is set to 4,10,20 and 40 Hz,*** experiments demonstrate the reliability and effectiveness of the pressure *** achievement will become an important basis for future research concerning precision manufacturing.

关键词： Pneumatic vibration isolators Pressure regulator transmission rate Rubber stiffness

Research on High Speed Communication Method of ELF-EM While Drilling Based on Adaptive Combined Filtering Algorithm

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China Communications 2023年第6期20卷 129-147页

作者： Fukai Li Jian Chen JianWu Huaiyun Peng Zhiqiang Yang School of Telecommunications Engineering Xidian UniversityXi’an 710071China National Key Laboratory of Electromagnetic Environment China Research Institute of Radiowave PropagationQingdao 266107China

In terms of the electromagnetic wave measurement while drilling,the extremely low frequency electromagnetic(ELF-EM)signal below 20Hz is usually chosen as the downhole data *** improve the transmission rate of ELF-EM signal and the signal to noise ratio(SNR)at the receiving end,the DQPSK modulation was proposed as the modulation method for the communication of electromagnetic wave *** from the traditional IQ orthogonal modulation and coherent demodulation methods,the proposed phase selection modulation and correlation algorithm demodulation are easier to implement and more *** regard to the communication synchronization,a fast algorithm,which based on the normalized cross-relation number,was used for waveform matching,and the maximum point of the correlation coefficient was used as the starting point of communication *** communication simulation results show that the proposed DQPSK modulation signal based on the adaptive combined filtering algorithm has better terminal error rate and transmission rate than the traditional modulation *** the same carrier frequency and code width,the transmission rate of DQPSK modulation is 4 to 5 times and 2 times that of PPM modulation and 2DPSK modulation *** communication modulation and demodulation modes as well as the decoding algorithm with combined adaptive filter proposed in this paper can effectively solve practical engineering problems.

关键词： ELF-EM DQPSK normalized crosscorrelation adaptive combined filtering transmission rate

Interaction Between Waves and An Array of Floating Porous Circular Cylinders

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China Ocean Engineering 2012年第3期26卷 397-412页

作者：赵芬芳 KINOSHITA Takeshi 鲍伟光黄六一梁振林万荣 College of Fisheries Ocean University of ChinaQingdao 266003China Institute of Industrial Science University of TokyoTokyo 153-8505Japan Shandong University at Weihai Weihai 264209China

The present study theoretically as well as experimentally investigates the interaction between waves and an array of porous circular cylinders with or without an inner porous plate based on the linear wave theory. To design more effective floating breakwaters, the transmission rate of waves propagating through the array is evaluated. Each cylinder in the array is partly made of porous materials. Specifically, it possesses a porous sidewall and an impermeable bottom. In addition, an inner porous plate is horizontally fixed inside the cylinders. It dissipates the wave more effectively and eliminates the sloshing phenomenon. The approach suggested by Kagemoto and Yue （1986） is adopted to solve the multiple-scatter problem, while a hierarchical interaction theory is adopted to deal with hydrodynamic interactions among a great number of bodies, which efficiently saves computation time. Meanwhile, a series of model tests with an array of porous cylinders is performed in a wave basin to validate the theoretical work and the calculated results. The draft of the cylinders, the location of the inner porous plate, and the spacing between adjacent cylinders are also adjusted to investigate their effects on wave dissipation.

关键词： porous cylinders hydrodynamic interaction transmission rate open-area ratio wave dissipation

Collaborative D2D Communication in Relay Networks with Energy Harvesting

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China Communications 2022年第9期19卷 162-170页

作者： Qiang Li Pinyi Ren School of Information and Communication Engineering Xi’an Jiaotong UniversityXi’an 710049China Shaanxi Smart Networks and Ubiquitous Access Research Center Xi’an 710049China

Although the collaborative transmission of cellular network and device-to-device(D2D)pairs can improve spectrum utilization,it also results in the matual interference,which may be fatal for low-energy D2D *** on this,we propose in this paper a collaborative D2D transmission scheme with erergy harvesting(CDTEH)in a relay network,where D2D pairs are allowed to access the spectrum of relay network to accomplish their own *** particular,the relay with energy harvesting is arranged to not only expand cellular transmission range but also assist D2D and cellular users to eliminate the mutual *** evaluate the performance,rate-energy(R-E)region is *** on the model,a data rate maximization problem of D2D pair is formulated,subject to a transmission demand of the cellular user and the optimal solution is ***,numerical results are provided to validate the proposed scheme improves the data rate of D2D pair ensuring the cellular transmission requirement.

关键词： energy harvesting transmission rate R-E region collaborative D2D communication

Studies on the Formation and transmission of n + 1 Gametes of Cabbage Primary Trisomics

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Agricultural Sciences in China 2007年第7期6卷 786-791页

作者： ZHANG Cheng-he XUAN Shu-xin ZHU Hai-yan SHEN Shu-xing MAN Hong College of Horticulture Agricultural University of Hebei Baoding 071001 P.R. China

The transmission rate of n ＋ 1 gamete is an important parameter for the genetic analysis of trisomics. To correctly use the trisomics of the cabbage to carry out gene orientation and other genetic studies, the n ＋ 1 gamete transmission rates by female parent and by male parent were determined. The results showed that the n ＋ 1 gamete transmission rates were 15.28% for tri-1, 12.68% for tri-2, 12.31% for tri-3, 30.51% for tri-4, 22.81% for tri-5, 7.46% for tri-6, 5.36% for tri-7, 42.37% for tri-8, and 9.23% for tri-9 by female parent, and were 12.12% for tri-1, 12.33% for tri-2, 7.81% for tri-3, 4.76% for tri-4, 8.93% for tri-5, 10.94% for tri-6, 1.54% for tri-7, 2.94% for tri-8, and 13.04% for tri-9 by male parent. The main factors affecting the male n ＋ 1 gamete formation and transmission were the rate of trivalent formation at prophase Ⅰ, the rate of 9-9-10-10 division at anaphase Ⅱ, and the pollen viability.

关键词： cabbage primary trisomics N + 1 gametes transmission rate

transmission risk of asymptomatic SARS-CoV-2 infection:a systematic review and meta-analysis

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Infectious Medicine 2023年第1期2卷 11-18页

作者： Ci Zhang Chao Zhou Wanqing Xu Shimin Zheng Yanxiao Gao Peiqi Li Luojia Deng Xuezhixing Zhang Qianxue Jiang Frank Qian Xianhong Li Honghong Wang Huachun Zou Yinglin Xia Tao Wang Hui Lu Han-Zhu Qian Xiangya School of Nursing Central South UniversityChangshaChina Xiangya Center for Evidence-Based Nursing Practice&Healthcare Innovation(A JBI Affiliated Group) ChangshaHunan ProvinceChina Department of Bioinformatics and Biostatistics Shanghai Jiao Tong UniversityShanghaiChina T.H.Chan School of Public Health Harvard UniversityBostonMAUSA Department of Biostatistics and Epidemiology East Tennessee State UniversityJohnson CityTNUSA School of Public Health(Shenzhen) Sun Yat-sen UniversityShenzhenChina School of Acupuncture-Moxibustion and Tuina Shanghai University of Traditional Chinese MedicineShanghaiChina School of Public Health Yale UniversityNew HavenCTUSA Department of Medicine Beth Israel Deaconess Medical CenterHarvard Medical SchoolBostonMAUSA Department of Medicine University of Illinois at ChicagoChicagoILUSA GSK plc

Background:Global evidence on the transmission of asymptomatic SARS-CoV-2 infection needs to be ***:A search of 4 electronic databases(PubMed,EMBASE,Cochrane Library,and Web of Science databases)as of January 24,2021 was *** Reporting Items for Systematic Reviews and Meta-Analyses(PRISMA)guidelines were *** which reported the transmission rate among close contacts with asymptomatic SARS-CoV-2 cases were included,and transmission activities occurred were *** trans-mission rates were pooled by zero-inflated beta *** risk ratios(RRs)were calculated using random-effects ***:Of 4923 records retrieved and reviewed,15 studies including 3917 close contacts with asymptomatic indexes were *** pooled transmission rates were 1.79 per 100 person-days(or 1.79%,95%confidence interval[CI]0.41%-3.16%)by asymptomatic index,which is significantly lower than by presymptomatic(5.02%,95%CI 2.37%-7.66%;ptransmission rate of asymptomatic index was(4.22%,95%CI 0.91%-7.52%),four times significantly higher than non-household transmission(1.03%,95%CI 0.73%-1.33%;p=0.03),and the asymptomatic transmission rate in China(1.82%,95%CI 0.11%-3.53%)was lower than in other countries(2.22%,95%CI 0.67%-3.77%;p=0.01).Conclusions:People with asymptomatic SARS-CoV-2 infection are at risk of transmitting the virus to their close contacts,particularly in household *** transmission potential of asymptomatic infection is lower than symptomatic and presymptomatic *** meta-analysis provides evidence for predict-ing the epidemic trend and promulgating vaccination and other control *** with PROS-PERO International Prospective Register of Systematic Reviews,CRD42021269446;https://***/prospero/display_***?RecordID=269446.

关键词： SARS-CoV-2 Asymptomatic transmission rate Systematic review Meta-analysis

Dynamic interconnection component using wireless infrared technology

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Frontiers of Electrical and Electronic Engineering in China 2007年第3期2卷 322-325页

作者： JIA Dagong WANG Guanghui ZHANG Yimo ZHANG Yinxin JING Wencai ZHOU Ge College of Precision Instrument and Opto-electronics Engineering Tianjin UniversityTianjin 300072China

An efficient dynamic interconnection model using wireless infrared technology and the theory of optical interconnections was constructed to design a dual-channel interconnection *** were three conditions between the rotating optical field and the stationary optical field:end separation,angle misalignment and lateral *** calculation formulas were given for these three conditions.A dual-channel optical interconnection com-ponent was designed based on the dynamic interconnection model and the data transmission rate of the component was *** experimental result showed that the dual-channel optical interconnection component could transmit optical signals across the rotating *** maximum transmission rate can reach 2.14 Mb/s.

关键词： dynamic spatial interconnection wireless infrared rotary joint transmission rate