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Guarding Legal Communication with Smart Jammer:Stackelberg Game Based Power Control Analysis

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China Communications 2021年第4期18卷 126-136页

作者： Zhe Su Nan Qi Yongjie Yan zhiyong du Jiaxin Chen Zhibin Feng Qihui Wu College of Electronic and Information Engineering Nanjing University of Aeronautics and AstronauticsNanjing 211106China State Key Laboratory of Air Traffic Management System and Technology Nanjing 210014China th Research Institute of China Electronics Technology Group Corporation Nanjing 210007China College of Information and Communication National University of Defense TechnologyChangsha 430010China College of Communications Engineering Army Engineering University of PLANanjing 210000China

This paper investigates a power control problem in a jamming system,where a separate smart jammer is deployed to ensure the communication security of the legal ***,due to power leakage,the smart jammer may incur unintentional interference to legal *** key is how to suppress illegal communication while limit the negative impact on legal user.A jamming counter measure Stackelberg game is formulated to model the jamming power control dynamic of the *** smart jammer acts as a leader to sense and interfere illegal communications of the illegal user,while the illegal user acts as a *** the game,the impact of uncertain channel information is taken into *** to whether illegal user considers the uncertain channel information,we investigate two scenarios,namely,illegal user can obtain statistical distribution and accurate information of interference channel gain and its own cost,*** work not only proposes a jamming counter measure iterative algorithm to update parameters,but also gives two solutions to obtain the Stackelberg equilibrium(SE).The power convergence behaviours under two scenarios are analyzed and ***,brute force is used to verify the accuracy of the SE value further.

关键词： power control jamming communication Received:Apr.13,2020 Revised:Sep.01,2020 Editor:Haifeng Zheng systems Stackelberg game

Effect of quenching residual stress on precipitation behaviour of 7085 aluminium alloy

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Journal of Materials Science & Technology 2023年第1期132卷 154-165页

作者： Jin Liu zhiyong du Jinlong Su Jie Tang Fulin Jiang Dingfa Fu Jie Teng Hui Zhang College of Materials Science and Engineering Hunan UniversityChangsha 410082China

The quenching-induced residual stress in ultrahigh strength Al-Zn-Mg-Cu alloys has a great influence on their precipitation behaviour in subsequent heat treatment and the properties of the final *** the present work,the cladding quenching method was employed for 7085 Al alloy slabs to tailor different quenching residual *** the effects of quenching residual stress on the precipitation behaviour of the 7085 Al alloy were investigated through finite element analysis,residual stress and hardness distri-bution measurements and microstructural *** results indicate that the reduction in resid-ual stress increases with increasing cladding layer *** a cladding layer thickness in the range of 1-1.4 mm,the residual stress is almost *** hardness at the surface of the aged sample with a large compressive residual stress is decreased,while the hardness at the centre of the sample with a large tensile residual stress is *** hardness is approximately identical between the aged sam-ples with little or no residual *** elastic lattice distortion caused by residual stress is found to promote the nucleation of precipitates during the artificial ageing *** in-depth mechanisms for the effect of quenching residual stress on the precipitation of 7085 Al alloy are also discussed.

关键词： Aluminium alloy Quenching Residual stress Precipitation Finite element method

Design of ring-sector-assisted PANDA ring-core few mode fiber

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Optoelectronics Letters 2022年第6期18卷 366-371页

作者： du zhiyong WANG Chuncan LI Peixin PEI Li ZHENG Jingjing NING Tigang Key Laboratory of All Optical Network and Advanced Telecommunication Network Ministry of EducationInstitute of Lightwave TechnologyBeijing Jiaotong UniversityBeijing 100044.China

For the PANDA ring-core polarization-maintaining few-mode fiber(RC-PM-FMF)with the given supported eigenmodes,the minimum effective refractive index difference min(Δneff)between the adjacent eigenmodes decreases with the RC ***,we propose a PANDA RC-PM-FMF assisted by a ring-sector(RS)structure,which can be used to mainly increase theΔneff values between the adjacent even and odd eigenmodes with the same *** RS-RC-PM-FMF with an appropriate choice of the parameters can support 10 linearly polarized(LP)eigenmodes,which have min(Δneff)values higher than 1.9×10^(-4) for the adjacent eigenmodes over the whole C+L ***,the fiber is characterized by the low group velocity dispersion(GVD)(-40—20 ps·nm^(-1)·km^(-1))and effective mode areas(63—104μm^(2)),while the total losses are within the range of 0.19—0.23 d B/km over the whole band.

关键词： mode PANDA dispersion

High Frequency Communication Network with Diversity: System Structure and Key Enabling Techniques

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China Communications 2018年第9期15卷 46-59页

作者： Kun Xu Bin Jiang Zeyou Su Shengqing Wang Makun Guo Xiao Li zhiyong du College of Information and Communication National University of Defense Technology

High frequency sky wave communication suffers from poor performance including poor link quality and low link success rate. To enhance performance, diversity technology is proposed in the high frequency communication network(HFCN) in this ***, we present the benefits and the challenges by introducing diversity technology into the existing HFCN. Secondly, to exploit the benefits fully and overcome the challenges, we propose a system structure suitable for deploying diversity technology in HFCN in large scale,based on the cloud radio access network and software defined network. Moreover, we present a general structure for the real-time updating frequency management system that plays a more important role especially when resource consuming(e.g., frequency) diversity technology is deployed. Thirdly, we investigate the key techniques enabling diversity technology deployment. Finally, we point out the future research directions to help the HFCN with diversity work more efficiently and intelligently.

关键词： high frequency high frequency communication network diversity technology access layer and core layer frequency management system

Changes in neuronal apoptosis and apoptosis modulatory factors in cerebral ischemia/reperfusion

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Neural Regeneration Research 2007年第6期2卷 344-349页

作者： Liying Qiu Ying Li Hongbin Fan Bin du zhiyong Yang Jianqing Cheng Division of Basic Medical Science School of Medicine Meiyuan Branch of Southern Yangtze University Wuxi China

BACKGROUND： The high concentration of glutamate release is the main cause for neuronal cell death. The relationship between glutamate level and apoptosis during ischemia/reperfusion injury is still unclear. OBJECTIVE： To observe the neuronal apoptosis at 24 and 72 hours following cerebral ischemia/reperfusion in rats, and analyze the possible influencing factors. DESIGN： A randomized controlled animal experiment. SETTING： School of Medicine, Southern Yangtze University. MATERIALS： Totally 30 male adult Sprague Dawley （SD） rats of clean grade, weighing 240 - 290 g, were obtained from Shanghai Experimental Animal Center, Chinese Academy of Sciences. The rats were randomly divided into sham-operated group （n=10） and model group （n=20）. Each group was observed at 24 and 72 hours after ischemia/reperfusion, 5 rats at each time point in the sham-operated group, whereas 12 at 24 hours and 8 at 72 hours in the model group. Kits for determining apoptosis and Bcl-2 were bought from Wuhan Boster Biological Technology, Co., Ltd.; Kit for calcineurin from Nanjing Jiancheng Bioengineering Institute. METHODS： The experiment was carried out in the Functional Scientific Research Room of Southern Yangtze University from June to October in 2006.①Right middle cerebral artery was occluded by inserting a thread through internal carotid artery （ICA）. The surgical process for the sham-operated rats was the same as that in the model group except a nylon suture inserted the ICA. According to Longa five-degree standard, the neurological deficit evaluation of rats was evaluated after surgery, and grades 1 - 3 were taken as successful model establishment. The blood was recirculated by withdrawing the nylon filament under anesthesia at 2 hours after ischemia in successful rat models. ②After reperfusion, the brain tissue was quickly removed at 24 or 72 hours and the slices were obtained from optic chiasma to funnel manubrium. The changes of the number of apoptotic cells were observed using the te

关键词： brain ischemia reperfusion injuries excitatory amino acids cell apoptosis

Comparative analysis of four edible mushrooms based on HPLC fingerprint and pattein recognition analysis

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Journal of Future Foods 2024年第1期4卷 105-110页

作者： Xiali Si Xinyu Liu Shuangyu Shao zhiyong du Pengfei Tu Qingying Zhang Strate Key Laboratory of Natoral oud Biomimenic Drugs and Deportment of Natral Menicines School of Phormocutical ScimncesPekang Uravensin Heath Science CenterBeijing 100191China

A high performance liquid chromatography-ultraviolet(HPLC-UV)fingerprint method for the overall chemical analysis of edible mushrooms was established based on Auricularia heimuer for the first time,and then applied to analyze 60 batches of ***,Auricularia *** cornea*Yu Muer’and TremeUa fuciformis.A total of 9 characteristic peaks of ***.11 characteristic peaks of ***,6 characteristic peaks of ***‘Yu Muer’,and 9 characteristic peaks of I fuciformis were ***,a combinatory analysis,including similarity evaluation,hierarchical cluster analysis and principal component analysis,revealed the chemical consistency and difference between samples from the same and different *** HPLC fingerprint method established in this paper could be used to characterize the components of ***,***,***‘Yu Muer’,and *** and discriminate the 4 edible mushrooms effectively in combination with pattern recognition analysis.

关键词： Edible mushrooms High performance liquid chromatography fingerprint Pattern recognition analysis Auricularia heimuer Auricularia cornea Tremella fiiciformis

Activation of the Macrophage-Associated Inflammasome Exacerbates Myocardial Fibrosis Through the 15-HETE-Mediated Pathway in Acute Myocardial Infarction

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Engineering 2024年第11期42卷 143-156页

作者： Xu Chen zhiyong du Dongqing Guo Jincheng Guo Qianbin Sun Tiantian Liu Kun Hua Chun Li Yong Wang Wei Wang School of Traditional Chinese Medicine Beijing University of Chinese MedicineBeijing 100029China Department of Pharmacy Air Force Medical CenterAir Force Medical UniversityBeijing 100142China National Clinical Research Center for Cardiovascular Diseases Beijing Institute of Heart Lung and Blood Vessel DiseaseBeijing Anzhen HospitalCapital Medical UniversityBeijing 100029China School of Life Sciences Beijing University of Chinese MedicineBeijing 100029China Modern Research Center for Traditional Chinese Medicine Beijing University of Chinese MedicineBeijing 100029China State Key Laboratory of Traditional Chinese Medicine Syndrome Guangzhou University of Chinese MedicineGuangzhou 510006China

This investigation elucidates the spatiotemporal dynamics of NOD-like receptor family pyrin domain con-taining 3(NLRP3)inflammasome activation following myocardial infarction(MI),a process that has not been fully *** revealed early activation of the NLRP3 inflammasome in mice with MI and characterized its dynamic temporal ***,the knockout and inhibition of Nlrp3 expression were found to significantly mitigate infarct size and enhance cardiac ***,our analysis of the spatial characteristics of inflammasome activation revealed predominant activation in macro-phages and subsequent activation in fibroblasts on the third day *** elucidate the nexus between macrophage-associated NLRP3 inflammasome activation and myocardial fibrosis,we employed targeted metabolomics analyses of inflammatory oxylipins,small interfering RNA(siRNA)interference experi-ments,and various molecular *** findings revealed that macrophage-associated inflammasome activation facilitates the conversion of fibroblasts into myofibroblasts via the 15-hydroxy-5,8,11,13-eicosatetraenoic acid(15-HETE)-mediated small mother against decapentaplegic(Smad)***,both mass spectrometry imaging(MSI)and targeted metabolomics analyses confirmed the significant increase in 15-HETE levels in mice with MI and in patients with MI and acute coronary syndrome(ACS).Our comprehensive dataset suggests that NLRP3 inflammasome activation in MI is char-acterized by distinct temporal and spatial *** insights mark a significant advancement toward precise MI prevention and treatment strategies,particularly early myocardial fibrosis intervention.

关键词： Myocardial infarction Macrophage inflammasome NOD-like receptor family pyrin domain containing 3 Myocardial fibrosis

槟榔江水牛和德宏水牛肉质性状与营养成分分析

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肉类研究 2025年第1期39卷 9-17页

作者：杜治泳申晓静张浩张萌张丽娟张立新黄琴尹富鹞梅国栋毛华明李清云南农业大学动物科学技术学院云南省动物营养与饲料重点实验室云南昆明650201 德宏州畜牧站云南芒市678400

为探究槟榔江公水牛和德宏公水牛的肉品质及开发利用其肉用价值,分别选取(33±3)月龄的槟榔江公水牛(BLJ组)和德宏公水牛(DH组)各10头,在相同饲养管理条件下,每头补饲精料3 kg/d,自由采食全株玉米青贮,预实验期10 d,正式实验期90 d。结... 详细信息

为探究槟榔江公水牛和德宏公水牛的肉品质及开发利用其肉用价值,分别选取(33±3)月龄的槟榔江公水牛(BLJ组)和德宏公水牛(DH组)各10头,在相同饲养管理条件下,每头补饲精料3 kg/d,自由采食全株玉米青贮,预实验期10 d,正式实验期90 d。结果表明:BLJ组的背最长肌和股二头肌肉色亮度值、红度值、黄度值均明显高于DH组,眼肌面积极显著高于DH组(P<0.01)。在饱和脂肪酸中,BLJ组背最长肌C17:0、C18:0相对含量极显著高于DH组(P<0.01),C16:0相对含量显著低于DH组(P<0.05);BLJ组股二头肌中C18:0相对含量极显著高于DH组(P<0.01),C17:0显著高于DH组(P<0.05);多不饱和脂肪酸中,BLJ组股二头肌和背最长肌中C22:4 n-6相对含量极显著高于DH组(P<0.01),背最长肌中C20:4 n-6和C22:5 n-6相对含量显著高于DH组(P<0.05)。BLJ组背最长肌中易引发高胆固醇血症的多不饱和脂肪酸相对含量显著低于DH组(P<0.05);BLJ组的股二头肌胆固醇含量显著高于背最长肌(P<0.05),其背最长肌胆固醇含量极显著低于DH组(P<0.01)。综上,槟榔江水牛眼肌面积更大,肉色鲜红明亮,2种牛肉胆固醇含量较低,肌肉脂肪酸组成合理,均为优质脂肪酸肉类。

关键词：槟榔江水牛德宏水牛肉质性状脂肪酸胆固醇

EXPERIMENTAL STUDY ON TURBULENT BOUNDARY LAYER CHARACTERISTICS OVER STREAMWISE RIBLETS

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Journal of Hydrodynamics 2004年第3期16卷 350-355页

作者： ZHAOZhi-yong DONGShou-ping duYa-nan LaboratoryofFluidMeasurement UniversityofPetroleumBeijing102249China

Measurements of characteristics by means of a two-component Laser DopplerVelocimeter (LDV) were carried out in turbulent boundary layers over both a symmetric V-shapedribbed plate and a smooth one in a low speed wind tunnel. The present results clearly indicate thatthe logarithmic velocity profile over the riblets surface is shifted upward with a 30. 9% increasein the thickness of the viscous sublayer. Also a change in the log-law region is found. And themaximum value of streamwise velocity fluctuations is reduced by approximately 17%. The skewness andflatness factors do not show any change besides those in the region of y^+ duced. Further more, in log-law region, theReynolds shear stress has a larger reduction of up to 18%.

关键词： laser doppler velocimeter (LDV) stream-wise riblets turbulent boundarylayer turbulence fluctuations characteristics