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| 1 | Towards 6G wireless communication networks:vision,enabling technologies,and new paradigm shifts显示文摘The fifth generation(5G)wireless communication networks are being deployed worldwide from 2020 and more capabilities are in the process of being standardized,such as mass connectivity,ultra-reliability,and guaranteed low latency.However,5G will not meet all requirements of the future in 2030 and beyond,and sixth generation(6G)wireless communication networks are expected to provide global coverage,enhanced spectral/energy/cost efficiency,better intelligence level and security,etc.To meet these requirements,6G networks will rely on new enabling technologies,i.e.,air interface and transmission technologies and novel network architecture,such as waveform design,multiple access,channel coding schemes,multi-antenna technologies,network slicing,cell-free architecture,and cloud/fog/edge computing.Our vision on 6G is that it will have four new paradigm shifts.First,to satisfy the requirement of global coverage,6G will not be limited to terrestrial communication networks,which will need to be complemented with non-terrestrial networks such as satellite and unmanned aerial vehicle(UAV)communication networks,thus achieving a space-airground-sea integrated communication network.Second,all spectra will be fully explored to further increase data rates and connection density,including the sub-6GHz,millimeter wave(mmWave),terahertz(THz),and optical frequency bands.Third,facing the big datasets generated by the use of extremely heterogeneous networks,diverse communication scenarios,large numbers of antennas,wide bandwidths,and new service requirements,6G networks will enable a new range of smart applications with the aid of artificial intelligence(AI)and big data technologies.Fourth,network security will have to be strengthened when developing 6G networks.This article provides a comprehensive survey of recent advances and future trends in these four aspects.Clearly,6G with additional technical requirements beyond those of 5G will enable faster and further communications to the extent that the boundary between physical and cyber worlds disappears. | Xiaohu YOU Cheng-Xiang WANG Jie HUANG Xiqi GAO Zaichen ZHANG Mao WANG Yongming HUANG Chuan ZHANG Yanxiang JIANG Jiaheng WANG Min ZHU Bin SHENG Dongming WANG Zhiwen PAN Pengcheng ZHU Yang YANG Zening LIU Ping ZHANG Xiaofeng TAO Shaoqian LI Zhi CHEN Xinying MA Chih-Lin I Shuangfeng HAN Ke LI Chengkang PAN Zhimin ZHENG Lajos HANZO Xuemin(Sherman)SHEN Yingjie Jay GUO Zhiguo DING Harald HAAS Wen TONG Peiying ZHU Ganghua YANG Jun WANG Erik GLARSSON Hien Quoc NGO Wei HONG Haiming WANG Debin HOU Jixin CHEN Zhe CHEN Zhangcheng HAO Geoffrey Ye LI Rahim TAFAZOLLI Yue GAO HVincent POOR Gerhard P.FETTWEIS Ying-Chang LIANG | 2021 | Science China(Information Sciences)2021，64，1： | 122 |
| 2 | Comprehensive and high-resolution emission inventory of atmospheric pollutants for the northernmost cities agglomeration of Harbin-Changchun,China:Implications for local atmospheric environment management显示文摘Using a bottom-up estimation method,a comprehensive,high-resolution emission inventory of gaseous and particulate atmospheric pollutants for multiple anthropogenic sectors with typical local sources has been developed for the Harbin-Changchun city agglomeration(HCA).The annual emissions for CO,NO_(x),SO_(2),NH_(3),VOC S,PM_(2.5),PM 10,BC and OC during 2017 in the HCA were estimated to be 5.82 Tg,0.70 Tg,0.34 Tg,0.75 Tg,0.81 Tg,0.67 Tg,1.59 Tg,0.12 Tg and 0.26 Tg,respectively.For PM 10 and SO_(2),the emissions from industry processes were the dominant contributors representing 54.7%and 49.5%,respectively,of the total emissions,while 95.3%and 44.5%of the total NH_(3)and NO x emissions,respectively,were from or associated with agricultural activities and transportation.Spatiotemporal distributions showed that most emissions(except NH_(3))occurred in November to March and were concentrated in the central cities of Changchun and Harbin and the surrounding cities.Open burning of straw made an important contribution to PM_(2.5)in the central regions of the northeastern plain during autumn and spring,while domestic coal combustion for heating purposes was significant with respect to SO_(2)and PM_(2.5)emissions during autumn and winter.Furthermore,based on Principal Component Analysis and Multivariable Linear Regression model,air temperature,relative humidity,electricity and energy consumption,and the urban and rural population were optimized to be representative indicators for rapidly assessing the magnitude of regional atmospheric pollutants in the HCA.Such indicators and equations were demonstrated to be useful for local atmospheric environment management. | Mengduo Zhang Weiwei Chen Xiangjin Shen Hongmei Zhao Chengkang Gao Xuelei Zhang Wei Liu Chengjiang Yang Yang Qin Shichun Zhang Jing Fu Daniel Tong Aijun Xiu | 2021 | Journal of Environmental Sciences2021，33，6： | 3 |
| 3 | Activation of the bitter taste sensor TRPM5 prevents high saltinduced cardiovascular dysfunction显示文摘High salt intake is a known risk factor of cardiovascular diseases. Our recent study demonstrated that long-term high salt intake impairs transient receptor potential channel M5(TRPM5)-mediated aversion to high salt concentrations, consequently promoting high salt intake and hypertension;however, it remains unknown whether TRPM5 activation ameliorates cardiovascular dysfunction. Herein we found that bitter melon extract(BME) and cucurbitacin E(CuE), a major compound in BME, lowered high salt-induced hypertension. Long-term BME intake significantly enhanced the aversion to high salt concentrations by upregulating TRPM5 expression and function, eventually decreasing excessive salt consumption in mice. Moreover, dietary BME ameliorated high salt-induced cardiovascular dysfunction and angiotensin II-induced hypertension in vivo. The mechanistic evidence demonstrated that dietary BME inhibited high salt-induced RhoA/Rho kinase pathway overactivation, leading to reduced phosphorylation levels of myosin light chain kinase and myosin phosphatase targeting subunit 1. Furthermore, CuE inhibited vasoconstriction by attenuating L-type Ca^(2+) channel-induced Ca^(2+) influx in vascular smooth muscle cells. To summarize, our findings indicate that dietary BME has a beneficial role in antagonizing excessive salt consumption and thus appears promising for the prevention of high salt-induced cardiovascular dysfunction. | Hao Wu Yuanting Cui Chengkang He Peng Gao Qiang Li Hexuan Zhang Yanli Jiang Yingru Hu Xiao Wei Zongshi Lu Tianyi Ma Daoyan Liu Zhiming Zhu | 2020 | Science China(Life Sciences)2020，63，11： | 2 |
| 4 | Promotive effect of multi-walled carbon nanotubes on Co_3O_4 nanosheets and their application in lithium-ion battery显示文摘Co3O4/MWCNTs composites have been synthesized by a simple hydrothermal method using a surfactant(CTAB) and a precipitation agent(urea). The samples were characterized by XRD, SEM and BET methods. The electrochemical properties of the samples as anode materials for lithium batteries were studied by EIS and Galvanostatic measurements. The Co3O4/MWCNTs composites displayed higher capacity and better cycle performance in comparison with the Co3O4 nanosheets. The remarkable improvement of electrochemical performance within the hybrid composites is probably related to the addition of MWCNTs that possesses improved properties such as excellent electric conductivity and large surface area, which helps to alleviate the effect of volume change, shorten the distance of lithium ion diffusion, facilitate the transmission of electron and keep the structure stable. | Yan Liu Xiaogang Zhang Chengkang Chang Dongyun Zhang Ying Wu | 2014 | Progress in Natural Science:Materials International2014，24，3： | 1 |
| 5 | Tunable emission and concentration quenching of Tb 3+ in magnesium phosphate lithium显示文摘 | Mingming Shi Dongyun Zhang Chengkang Chang | 2014 | Journal of Alloys and Compounds2014，，： | 1 |
| 6 | Generation of Long, Laminar Plasma Jets at Atmospheric Pressure and Effects of Flow Turbulence显示文摘 | Wenxia Pan Wenhua Zhang Wenhong Zhang Chengkang Wu | 2001 | Plasma Chemistry and Plasma Processing2001，，1： | 1 |
| 7 | Generation of Long, Laminar Plasma Jets at Atmospheric Pressure and Effects of Flow Turbulence显示文摘 | Wenxia Pan Wenhua Zhang Wenhong Zhang Chengkang Wu | 2001 | Plasma Chemistry and Plasma Processing2001，，1： | 1 |
| 8 | Electrochemical performance of LiFePO 4 nanorods obtained from hydrothermal process显示文摘 | Xiaojun Huang Shengjie Yan Huiying Zhao Lei Zhang Rui Guo Chengkang Chang Xiangyang Kong Haibo Han | 2010 | Materials Characterization2010，，7： | 1 |
| 9 | Sufficiently diffused attachment of nitrogen arc by gasdynamic action显示文摘For realizing diffused anode attachment in pure nitrogen arcs, a special arc plasma generator was designed and combined with suitable working parameters such as gas flow rate and arc current. The anode has a flow-restrictor channel of 2.8 mm diameter and downstream expansion half-angle of 8°, with the purpose of creating a dispersed nitrogen-arc column by strong gasdynamic expansion effect. Results show that,when thermal blocking condition existed in the flow restrictor and the cathode cavity pressure was higher than that in the exit chamber by at least 9 k Pa, the action due to gasdynamic expansion could be much stronger than the self-magnetic contraction effect of the arc and the nitrogen arc column could be effectively dispersed to form a sufficiently diffused attachment on the water-cooled anode surface. | Wenxia Pan Lewen Chen Xian Meng Yong Zhang Chengkang Wu | 2016 | Theoretical & Applied Mechanics Letters2016，6，6： | 1 |
| 10 | Electrochemical performance of LiFePO 4 nanorods obtained from hydrothermal process显示文摘 | Xiaojun Huang Shengjie Yan Huiying Zhao Lei Zhang Rui Guo Chengkang Chang Xiangyang Kong Haibo Han | 2010 | Materials Characterization2010，，7： | 1 |
| 11 | Bioinformatic analysis of human nuclear receptor nr5a2(hb1f) genomic sequence显示文摘We have cloned the cDNA of human nuclear receptor nr5a2(hb1f) gene and obtained its whole genomic sequence previously. In this work we carried out in-depth bioinformatic analysis on the genomic sequence of nr5a2(hb1f) gene. Sequence comparison and prediction algorithms implicated that there might be additional coding regions in the 210 kb genomic sequence besides known exons, especially in the two largest introns. Comparison of the structures of nr5a loci in different species revealed distinguishable conservation and apparent gene duplication during evolution. The remarkable conservation among promoters of zebrafish, mouse and human nr5a2 genes suggested that they would be regulated by the same transcription factors. | Zhang Chengkang Lin Wei Cai Yanning Dong Hui Li Mei Fu Gang Xie Youhua Huang M.Guyang Wang Yuan | 2002 | Chinese Science Bulletin2002，47，7： | 0 |
| 12 | Improved electrochemical properties by lithium insertion into Co_3O_4 in aqueous LiOH solution显示文摘Co_3O_4 microspheres were synthesized by a simple hydrothermal treatment.The first-cycle charge-discharge tests were carried out between-0.6 and 0.6 V vs.SCE.The pristine,discharged and recharged specimens were characterized by X-ray power diffraction and scanning electron microscopy.Cyclic voltammetry(CV) curves of Co_3O_4 at various concentrations in LiOH solution were investigated.The appearance of the two pairs of redox peaks indicated that two sets of faradaic reactions were involved in the redox reactions of Co_3O_4 to LiCoO_2 and LiHCoO_2. | Yan Liu Chengkang Chang Dongyun Zhang Ying Wu | 2013 | Progress in Natural Science:Materials International2013，23，6： | 0 |
| 13 | Blockchain Based Secure Relay Scheme for Space-Terrestrial Integrated Networks显示文摘The future 6G networks will integrates space and terrestrial networks to realize a fully connected world with extensive collaboration.However,how to build trust between multiple parties is a difficult problem for secure cooperation without a reliable third-party.Blockchain is a promising technology to solve this problem by converting the trust between multi-parties to the trust to the common shared data.Several works have proposed to apply the incentive mechanism in blockchain to encourage effective cooperation,but how to evaluate the cooperation performance and avoid breach of contract is not discussed.In this paper,a secure relay scheme is proposed based on the consortium blockchain system composed by different operators.In particular,smart contract checks the integrity of the message based on RSA accumulator,and executes transactions automatically when the message is delivered successfully.Detailed procedures are introduced for both uplink and downlink relay.Implementation based on Hyperledger Fabric proves the effectiveness of the proposed scheme and shows that the complexity of the scheme is low enough for practical deployment. | Zhen Gao Jiuzhi Zhang Dongbin Zhang Ailing Wang Chengkang Pan Xin Li | 2023 | China Communications2023，20，5： | 0 |
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