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100篇 您的检索式:作者名="Minghao Zhang"
    题名 作者 年代 出处 被引量
1Homocysteine-mediated cholesterol efflux via ABCA1 and ACAT1 DNA methylation in THP-1 monocyte-derived foam cells显示文摘Homocysteine (Hcy ) 为心血管的事件作为一个流行风险因素被认出了。装载胆固醇的泡沫房间是动脉粥样硬化患者损害的一个中央部件。ATP 有约束力的盒子 transporter A1 (ABCA1 ) 它调停细胞的胆固醇和 phospholipids 的流出,是在类脂化合物的限制率的步新陈代谢。酰辅酶 A:cholesterol acyltransferase-1 (ACAT1 ) 在巨噬细胞支持胆固醇酉旨的累积,从而导致泡沫房间形成,在动脉粥样硬化的早舞台的一个特点。在这研究,有教养的导出单核白血球的泡沫房间为 24 h 与 Hcy 的临床的相关集中被孵化。胆固醇的房间和累积被发现的泡沫的两个都增加的数字,和 ABCA1 的 mRNA 和蛋白质表示层次被减少,当 ACAT1 表示面对 Hcy 被增加时。而且,而 ACAT1 DNA methylation 被使用 Hcy 的不同集中减少, ABCA1 基因的 DNA methylation 水平被增加。而且,我们的结果显示出那项 DNA methyltransferase (DNMT ) 活动和 DNA methyltransferase 1 (DNMT1 ) mRNA 表示被 Hcy 增加。DNA methylation 有功能经由 DNMT 调整 ABCA1 和 ACAT1 的表示,这被显示。在结论,这些结果建议 Hcy 导致的 ABCA1 和 ACAT1 DNA methylation 可以在导出单核白血球的泡沫房间在 ABCA1 和 ACAT1 表示和胆固醇的累积起一个潜在的作用。Yu Liang Xiaoling Yang Linna Ma Xin Cai Lei Wang Cheng Yang Guizhong Li Minghao Zhang Weiwei Sun Yideng Jiang 2013Acta Biochimica et Biophysica Sinica2013,45,3:26
2Ecosystem Health Assessment of Honghu Lake Wetland of China Using Artificial Neural Network Approach显示文摘Honghu Lake,located in the southeast of Hubei Province,China,has suffered a severe disturbance during the past few decades.To restore the ecosystem,the Honghu Lake Wetland Protection and Restoration Demonstration Project(HLWPRDP) has been implemented since 2004.A back propagation(BP) artificial neural network(ANN) approach was applied to evaluatinig the ecosystem health of the Honghu Lake wetland.And the effectiveness of the HLWPRDP was also assessed by comparing the ecosystem health before and after the project.Particularly,12 ecosystem health indices were used as evaluation parameters to establish a set of three-layer BP ANNs.The output is one layer of ecosystem health index.After training and testing the BP ANNs,an optimal model of BP ANNs was selected to assess the ecosystem health of the Honghu Lake wetland.The result indicates that four stages can be identified based on the change of the ecosystem health from 1990 to 2008 and the ecosystem health index ranges from morbidity before the implementation of HLWPRDP(in 2002) to middle health after the implementation of the HLWPRDP(in 2005).It demonstrates that the HLWPRDP is effective and the BP ANN could be used as a tool for the assessment of ecosystem health.MO Minghao WANG Xuelei WU Houjian CAI Shuming Xiaoyang ZHANG WANG Huiliang 2009Chinese Geographical Science2009,19,4:21
3Endoplasmic reticulum oxidoreductin 1α mediates hepatic endoplasmic reticulum stress in homocysteine-induced atherosclerosis显示文摘Endoplasmic 蜂窝胃(嗯) 应力作为不同病理学的过程的一个重要调节的人并且作为贡献导致的 homocysteine (Hcy ) 的机制正在出现 hepar 损害。然而,分子的事件导致 Hcy 嗯在在动脉粥样硬化背景下面的 hepar 的应力当前是未知的。Endoplasmic 蜂窝胃 oxidoreductin (ERO1 ) 1 在维持起一个关键作用嗯压力功能。在这研究,我们在 hepacytes 在 hyperhomocysteinemia 和 ERO1 的效果在 hepar 决定了 ERO1 的表示嗯应力面对 Hcy。HHcy 模型被在 apolipoprotein-E-deficient (ApoE-/-) 喂蛋氨酸食谱建立老鼠,和 hepatocytes 与 Hcy 的叶酸、不同的集中被孵化。我们的结果证明 Hcy 被触发嗯应力描绘了由一调整葡萄糖的蛋白质的增加的内容 78 (GRP78 ) ,蛋白质 kinase 象 RNA 一样嗯 kinase (津贴) ,激活抄写因素(ATF ) 6 并且 X 盒子有约束力的 protein-1 (XBP-1 ) 。在 HHcy 老鼠和对待 Hcy 的 hepatocytes 的 ERO1 表情在 ApoE-/- 组和控制 hepacytes 与那些相比被减少(P < 0.05 ) 分别地。有小介入的 RNA 的 ERO1 的表示显著地扩充了的敲门下面导致 Hcy 嗯应力。同时,表情嗯压力相关的因素包括 GRP78,津贴, ATF6 和 XBP-1,当 ERO1 基因在 hepacytes 是过去表示的时,显著地被减少。我们的结果建议 ERO1 可以涉及导致 Hcy 的 hepar 嗯 ERO1 表示的应力,和抑制能加速这进程。Xiaoling Yang Hua Xu Yinju Hao Li Zhao Xin Cai Jue Tian Minghao Zhang Xuebo Han Shengchao Ma Jun Cao Yideng Jiang 2014Acta Biochimica et Biophysica Sinica2014,46,10:14
4Exosomes-the enigmatic regulators of bone homeostasis显示文摘Exosomes are a heterogeneous group of cell-derived membranous structures, which mediate crosstalk interaction between cells.Recent studies have revealed a close relationship between exosomes and bone homeostasis. It is suggested that bone cells can spontaneously secret exosomes containing proteins, lipids and nucleic acids, which then to regulate osteoclastogenesis and osteogenesis. However, the network of regulatory activities of exosomes in bone homeostasis as well as their therapeutic potential in bone injury remain largely unknown. This review will detail and discuss the characteristics of exosomes, the regulatory activities of exosomes in bone homeostasis as well as the clinical potential of exosomes in bone injury.Minhao Gao Weiyang Gao J. M. Papadimitriou Changqing Zhang Junjie Gao Minghao Zheng 2018Bone Research2018,6,4:13
5Molecular mechanism of SCARB2-mediatec attachment and uncoating of EV71显示文摘Minghao Dang Xiangxi Wang Quan Wang Yaxin Wang Jianping Lin Yuna Sun Xuemei Li Liguo Zhang Zhiyong Lou Junzhi Wang Zihe Rao 2014Protein & Cell2014,5,9:13
6Recent development of a refined multiple air pollutant emission inventory of vehicles in the Central Plains of China显示文摘Central Plains region of China,represented by Henan Province,is facing serious air pollution problems.Vehicular exhaust emissions had adverse impacts on the atmospheric environment.The first comprehensive and novel vehicle emission inventory for Henan Province using vehicle kilometers traveled,localized emission factors,and activity data at city-level was developed.Furthermore,3 km×3 km gridded emission and temporal variations were determined by using localized information.Results show that the total emissions of sulfur dioxide(SO2),nitrogen oxides(NOx),carbon monoxide(CO),particular matter with aerodynamic diameter<10μm(PM10),aerodynamic diameter<2.5μm(PM2.5),volatile organic compounds(VOCs),VOCs-evaporation and ammonia in 2015 were 9.1,533.4,1190.7,23.7,21.6,150.8,31.5 and 10.4 Gg,respectively,and the emission intensities of the above pollutants were 0.05,2.7,6.0,0.1,0.1,0.8,0.2 and 0.05 g/km,respectively.Vehicles meeting the Primary China 1,China 3 and China 4 contributed 89.1%,82.7%,75.3%,75.5%,75.5%,68.2%,68.4%and 82.3%for SO2,NOx,CO,PM10,PM2.5,VOCs,VOCs-evaporation and ammonia emissions,respectively.Zhengzhou,Zhoukou,Nanyang,Luoyang,Shangqiu and Xinyang showed relatively higher emissions and contributed more than 50%of each pollutant.The spatial distribution indicated obvious characteristics of the road network,and high-level emission was concentrated in the downtown areas.Additionally,the ozone formation potential(OFP)based on the estimated speciated VOC emissions was 569.6 Gg in Henan Province.Aliphatic and aromatic hydrocarbons were the main species of VOCs,whereas olefins contributed the largest proportion of OFP,with 42.2%.Xingke Gu Shasha Yin Xuan Lu Huan Zhang Lingling Wang Ling Bai Chen Wang Ruiqin Zhang Minghao Yuan 2019Journal of Environmental Sciences2019,31,10:11
7Characteristics,sources and health risks assessment of VOCs in Zhengzhou,China during haze pollution season显示文摘Zhengzhou is one of the most haze-polluted cities in Central China with high organic carbon emission,which accounts for 15%-20%of particulate matter(PM_(2.5))in winter and causes significantly adverse health effects.Volatile organic compounds(VOCs)are the precursors of secondary PM_(2.5)and O_(3)formation.An investigation of characteristics,sources and health risks assessment of VOCs was carried out at the urban area of Zhengzhou from 1^(st) to 31^(st) December,2019.The mean concentrations of total detected VOCs were 48.8±23.0 ppbv.Alkanes(22.0±10.4 ppbv),halocarbons(8.1±3.9 ppbv)and aromatics(6.5±3.9 ppbv)were the predominant VOC species,followed by alkenes(5.1±3.3 ppbv),oxygenated VOCs(3.6±1.8 ppbv),alkyne(3.5±1.9,ppbv)and sulfide(0.5±0.9 ppbv).The Positive Matrix Factorization model was used to identify and apportion VOCs sources.Five major sources of VOCs were identified as vehicular exhaust,industrial processes,combustion,fuel evaporation,and solvent use.The carcinogenic and non-carcinogenic risk values of species were calculated.The carcinogenic and non-carcinogenic risks of almost all air toxics increased during haze days.The total non-carcinogenic risks exceeded the acceptable ranges.Most VOC species posed no non-carcinogenic risk during three haze events.The carcinogenic risks of chloroform,1,2-dichloroethane,1,2-dibromoethane,benzyl chloride,hexachloro-1,3-butadiene,benzene and naphthalene were above the acceptable level(1.0×10^(-6))but below the tolerable risk level(1.0×10^(-4)).Industrial emission was the major contributor to non-carcinogenic,and solvent use was the major contributor to carcinogenic risks.Dong Zhang Bing He Minghao Yuan Shijie Yu Shasha Yin Ruiqin Zhang 2021Journal of Environmental Sciences2021,33,10:10
8Degradation of bisphenol-A using ultrasonic irradiation assisted by low-concentration hydrogen peroxide显示文摘This study investigated the degradation of bisphenol-A (BPA) by ultrasonic irradiation in the presence of different additives (H2O2,air bubbles and humic acid) under various operating conditions,i.e.,ultrasonic frequency,power intensity and power density.The results demonstrated that the BPA degradation followed pseudo first-order kinetics under different experimental conditions.The optimum power intensities were 0.9,1.8,and 3.0W/cm 2 at the frequencies of 400,670,and 800 kHz,respectively.At the fixed frequency (800 kHz),the degradation rate of BPA was shown proportional to the increase of power density applied.With this manner,the BPA sonolysis could be facilitated at H2O2 dosage being lower than 0.1 mmol/L;while BPA degradation was hindered at H2O2 concentration in excess of 1 mmol/L.Additionally,BPA removal was shown to be inhibited by the presence of aeration and humic acid during ultrasonic irradiation.The present study suggested that the degradation rate of BPA assisted by ultrasonic irradiation was influenced by a variety of factors,and high BPA removal rate could be achieved under appropriate conditions.Kejia Zhang Naiyun Gao Yang Deng Tsair Fuh Lin Yan Ma Lei Li Minghao Sui 2011Journal of Environmental Sciences2011,23,1:9
9TIM-1 acts a dual-attachment receptor for Ebolavirus by interacting directly with viral GP and the PS on the viral envelope显示文摘Ebolavirus 能与 50%90% 的死亡率在人引起出血性的发烧。当前,没有同意的疫苗和抗病毒的治疗是可得到的。人的 TIM1 为 EBOV 被看作一个附件因素,提高通过和位于病毒的信封的 PS 的相互作用的病毒的感染。然而,推理由 filovirus 位于 hTIM-1,然而并非另外的 PS 有约束力的受体的更好的用法下面,未知的遗体。我们第一在 vitro 表明了在 hTIM-1 和 EBOV GP 之间的一个直接相互作用并且决定了 hTIM-1 和 hTIM-4 的 Ig V 领域的水晶结构。在到 EBOV GP 的 hTIM-1 的有约束力的区域被怪物和变化试金印射,它基于结构的分析被设计。象点异种一样用 hTIM-1 和它的相当或相同的事物执行的 Pseudovirion 感染试金在 EBOV 细胞的入口验证了 GP 有约束力的地点和 EBOV GP-hTIM-1 相互作用的重要性的地点。Shuai Yuan Lei Cao Hui Ling Minghao Dang Yao Sun Xuyuan Zhang Yutao Chen Liguo Zhang Dan Su Xiangxi Wang Zihe Rao 2015Protein & Cell2015,6,11:6
10A novel local search for unicost set covering problem using hyperedge configuration checking and weight diversity显示文摘The unicost version of well-known set covering problem(SCP) is central to a wide variety of practical applications for which finding an optimal solution quickly is crucial. In this paper, we propose a new local searchbased algorithm for the unicost SCP which follows the general framework of the popular stochastic local search with a particular focus on the hyperedge selection strategy and weight diversity strategy. Specifically, a strategy as called hyperedge configuration checking strategy is proposed here to avoid the search trajectory which leads to local optima. Additionally, a new weight diversity strategy is proposed for the diversification of search results,by changing the weight of both covered and uncovered vertices in the current solution. The experimental results show that our algorithm significantly outperforms the state-of-the-art heuristic algorithm by one to two orders of magnitudes on the 85 classical instances. Also, our algorithm improves the current optimal solutions of11 instances.Yiyuan WANG Dantong OUYANG Liming ZHANG Minghao YIN 2017Science China(Information Sciences)2017,60,6:5
11GOLM1 exacerbates CD8^(+)T cell suppression in hepatocellular carcinoma by promoting exosomal PD-L1 transport into tumor-associated macrophages显示文摘The immunosuppressive microenvironment plays an important role in tumor progression and immunotherapy responses.Golgi membrane protein 1(GOLM1)is correlated to hepatocellular carcinoma(HCC)progression and metastasis.However,little is known about the role of GOLM1 in regulating the immunosuppressive environment and its impact on immunotherapeutic efficacy in HCC.In this study,GOLM1 was positively correlated with infiltrating tumor-associated macrophages(TAMs)expressed high levels of programmed death-ligand 1(PD-L1)and CD8^(+)T cell suppression in HCC tissues.Both gain-and loss-of-function studies determined a close correlation between GOLM1 and immunosuppression.In the mechanism,GOLM1 promoted COP9 signalosome 5-mediated PD-L1 deubiquitination in HCC cells and increased the transport of PD-L1 into exosomes via suppression of Rab27b expression.Furthermore,co-culture with exosomes derived from HCC cells upregulated the expression of PD-L1 on macrophages.Zoledronic acid in combination with anti-PD-L1 therapy reduced PD-L1^(+)TAMs infiltration and alleviated CD8^(+)T cell suppression,resulting in tumor growth inhibition in the mouse HCC model.Together,our study unveils a mechanism by which GOLM1 induces CD8^(+)T cells suppression through promoting PD-L1 stabilization and transporting PD-L1 into TAMs with exosome dependent.Targeting PD-L1^(+)TAM could be a novel strategy to enhance the efficacy of anti-PD-L1 therapy in HCC.Jinhong Chen Zhifei Lin Lu Liu Rui Zhang Yan Geng Minghao Fan Wenwei Zhu Ming Lu Lu Lu Huliang Jia Jubo Zhang Lun-Xiu Qin 2021Signal Transduction and Targeted Therapy2021,6,12:5
12Porous Si/C composite as anode materials for high-performance rechargeable lithium-ion battery显示文摘A novel porous silicon was synthesized through a magnesiothermic reduction method of molecular sieve for the first time, Si/C composite was synthesized by using pitch as carbon source. The porous Si/C composite shows a high initial specific capacity of 2018.5 mAh/g with current density of 0.1 A/g. When the current density increases to 2 A/g, it still exhibits high average specific capacity of 640.3 mAh/g. The porous structure can remit the Si particle pulverization during the lithiation/delithiation process. This article can provide a reference for the research of the porous Si anode for the high performance rechargeable lithium-ion battery.Bingbing Deng Lian Shen Yangai Liu Tao Yang Manshu Zhang Renjie Liu Zhaohui Huang Minghao Fang Xiaowen Wu 2017Chinese Chemical Letters2017,28,12:4
13Monoclonal Antibody-Based Serological Detection Methods for Wheat Dwarf Virus显示文摘Wheat dwarf disease caused by wheat dwarf virus(WDV) is currently present in wheat growing regions in China and causes serious losses in wheat yield. To develop reliable and effective serological detection methods for WDV, the coat protein(CP) gene of WDV was cloned and expressed in Escherichia coli. The purified recombinant CP protein was immunized to BALB/c mice, and four hybridoma cell lines(i.e. 18G10, 9G4, 23F4 and 22A10) secreting anti-WDV monoclonal antibodies(MAbs) were obtained through the hybridoma technique. Using the prepared MAbs, an antigencoated-plate enzyme-linked immunosorbent assay(ACP-ELISA) and a dot-ELISA were established for detecting WDV in wheat samples. The most sensitive ACP-ELISA based on MAb 23F4 or 22A10 was able to detect WDV in 1:163,840(w/v,g/mL) diluted WDV-infected wheat plant crude extracts. The dot-ELISA based on MAb 23F4 was the most sensitive and able to detect the virus in 1:5,120(w/v, g/mL) diluted wheat plant crude extracts. A total of 128 wheat samples were collected from wheat growing regions in the Shaanxi and Qinghai provinces, China, and were screened for the presence of WDV using two developed serological assays. Results from the survey showed that approximately 62% of the samples were infected with WDV. PCR followed by DNA sequencing and sequence alignment validated the results from the two serological assays. Therefore, we consider that these two serological detection methods can be significantly useful for the control of WDV in China.Minghao Zhang Rui Chen Xueping Zhou Jianxiang Wu 2018Virologica Sinica2018,33,2:4
14Enhanced production of seed oil with improved fatty acid composition by overexpressing NAD^(+)-dependent glycerol-3-phosphate dehydrogenase in soybean显示文摘There is growing interest in expanding the production of soybean oils(mainly triacylglycerol, or TAG) to meet rising feed demand and address global energy concerns. We report that a plastidlocalized glycerol-3-phosphate dehydrogenase(GPDH), encoded by GmGPDHp1 gene, catalyzes the formation of glycerol-3-phosphate(G3 P), an obligate substrate required for TAG biosynthesis.Overexpression of GmGPDHp1 increases soybean seed oil content with high levels of unsaturated fatty acids(FAs), especially oleic acid(C18:1), without detectably affecting growth or seed protein content or seed weight. Based on the lipidomic analyses, we found that the increase in G3 P content led to an elevated diacylglycerol(DAG) pool, in which the Kennedy pathwayderived DAG was mostly increased, followed by PC-derived DAG, thereby promoting the synthesis of TAG containing relatively high proportion of C18:1. The increased G3 P levels induced several transcriptional alterations of genes involved in the glycerolipid pathways. In particular, genes encoding the enzymes responsible for de novo glycerolipid synthesis were largely upregulated in the transgenic lines, in-line with the identified biochemical phenotype. These results reveal a key role for GmGPDHp1-mediated G3 P metabolism in enhancing TAG synthesis and demonstrate a strategy to modify the FA compositions of soybean oils for improved nutrition and biofuel.Ying Zhao Pan Cao Yifan Cui Dongxu Liu Jiapeng Li Yabin Zhao Siqi Yang Bo Zhang Runnan Zhou Minghao Sun Xuetian Guo Mingliang Yang Dawei Xin Zhanguo Zhang Xin Li Chen Lv Chunyan Liu Zhaoming Qi Jingyu Xu Xiaoxia Wu Qingshan Chen 2021Journal of Integrative Plant Biology2021,63,6:4
15Photosynthetic acclimation to long-term high temperature and soil drought stress in two spruce species (Picea crassifolia and P. wilsonii) used for afforestation显示文摘Picea crassifolia and P.wilsonii,commonly used for afforestation in northern China,are increasingly likely to be subjected to high temperatures and soil drought stress as a result of global warming.However,little is known about the effects of these stresses on foliar photosynthesis in the two species.To investigate how photosynthetic characteristics and sensitivity respond to prolonged high temperatures and soil drought,foliar gas exchange and other closely related parameters were recorded from four-year-old seedlings of both species.Seedlings were grown under two temperature treatments(25/15 and 35/25 °C) and four soil water regimes [80,60,40 and 20% of maximum field capacity(FC)] for 4 months.Although all treatments significantly reduced photosynthetic rates(P_n) of both species,P.crassifolia exhibited greater photosynthetic acclimation than P.wilsonii.Differences in photosynthetic acclimation were mainly related to variations in stomatal conductance(Cond) and the maximum quantum yield of PSII(F_v/F_m) between treatments.Indeed,higher Cond and F_v/F_m in all treatments were shown for P.crassifolia than for P.wilsonii.Moreover,photosynthesis in P.crassifolia exhibited inherently lower temperature sensitivities(broader span for the temperature response curves; lower b) and higher thermostability(invariable b between treatments).Further,severe drought stress(20% FC) limited the survival of P.wilsonii.Our results indicate that P.wilsonii is more susceptible to high temperatures and soil drought stress.Planting P.crassifolia would be more expected to survive these conditions and hence be of greater benefit to forest stability if predicted increases in drought and temperature in northern China occur.Xiaowei Zhang Litong Chen Jingru Wang Minghao Wang Shuli Yang Changming Zhao 2018Journal of Forestry Research2018,29,2:4
16Effects of Angular Fillers on Thermal Runaway of Lithium-Ion Battery显示文摘By adding 1 wt% damage homogenizer(DH), i.e. carbon black microparticles, into the electrodes of lithiumion batteries, thermal runaway can be mitigated as the battery cells are subjected to impact loadings. In a drop tower test, the generated heat of the modified cells is reduced by nearly 40%, compared with the reference cells. This phenomenon may be attributed to the weakening effect of the carbon black fillers.The shape of the filler grains does not have a pronounced influence on the temperature profile.Meng Wang Anh V.Le Yang Shi Daniel J.Noelle Hyojung Yoon Minghao Zhang Y.Shirley Meng Yu Qiao 2016Journal of Materials Science & Technology2016,32,11:3
17Methylesterification of cell-wall pectin controls the diurnal flower-opening times in rice显示文摘Flowers are the core reproductive organ of plants, and flowering is essential for cross-pollination. Diurnal flower-opening time is thus a key trait influencing reproductive isolation, hybrid breeding, and thermostability in plants. However, the molecular mechanisms controlling this trait remain unknown. Here, we report that rice Diurnal Flower Opening Time 1 (DFOT1) modulates pectin methylesterase (PME) activity to regulate pectin methylesterification levels of the lodicule cell walls, which affect lodicule swelling to control diurnal flower-opening time. DFOT1 is specifically expressed in the lodicules, and its expression gradually increases with the approach to flowering but decreases with flowering. Importantly, a knockout of DFOT1 showed earlier diurnal flower opening. We demonstrate that DFOT1 interacts directly with multiple PMEs to promote their activity. Knockout of PME40 also resulted in early diurnal flower opening, whereas overexpression of PME42 delayed diurnal flower opening. Lower PME activity was observed to be associated with higher levels of pectin methylesterification and the softening of cell walls in lodicules, which contribute to the absorption of water by lodicules and cause them to swell, thus promoting early diurnal flower opening. Higher PME activity had the opposite effect. Collectively, our work uncovers a molecular mechanism underlying the regulation of diurnal flower-opening time in rice, which would help reduce the costs of hybrid breeding and improve the heat tolerance of flowering plants by avoiding higher temperatures at anthesis.Mumei Wang Xiaopei Zhu Guoqing Peng Minglong Liu Shuqing Zhang Minghao Chen Shitang Liao Xiaoying Wei Peng Xu Xiyu Tan Fangping Li Zhichuan Li Li Deng Ziliang Luo Liya Zhu Shuai Zhao Dagang Jiang Jing Li Zhenlan Liu Xianrong Xie Shaokui Wang Aimin Wu Chuxiong Zhuang Hai Zhou 2022Molecular Plant2022,15,6:2
18Security and privacy in 6G networks:New areas and new challenges显示文摘With the deployment of more and more 5g networks,the limitations of 5g networks have been found,which undoubtedly promotes the exploratory research of 6G networks as the next generation solutions.These investigations include the fundamental security and privacy problems associated with 6G technologies.Therefore,in order to consolidate and solidify this foundational research as a basis for future investigations,we have prepared a survey on the status quo of 6G security and privacy.The survey begins with a historical review of previous networking technologies and how they have informed the current trends in 6G networking.We then discuss four key aspects of 6G networks–real-time intelligent edge computing,distributed artificial intelligence,intelligent radio,and 3D intercoms–and some promising emerging technologies in each area,along with the relevant security and privacy issues.The survey concludes with a report on the potential use of 6G.Some of the references used in this paper along and further details of several points raised can be found at:security-privacyin5g-6g.github.io.Minghao Wang Tianqing Zhu Tao Zhang Jun Zhang Shui Yu Wanlei Zhou 2020Digital Communications and Networks2020,6,3:2
19Preparation,structure,luminescence properties of europium doped zinc spinel structure green-emitting phosphor ZnAl_2O_4:Eu^(2+)显示文摘The Zn_(1-x)Al_2 O_4:xEu^(2+) phosphor powders were synthesized by the solid-state reaction method.The synthesis temperature for ZnAl_2 O_4 was optimized,whereas the phase structure,TEM images,photoluminescence(PL) properties,the concentration quenching mechanism,the fluorescence decay curves,as well as the CIE chromaticity coordinates of the samples were investigated in details.Under the excitation at 379 nm,the phosphor exhibits an asymmetric broad-band green emission with a peak at 532 nm,which is ascribed to the 5 d-4 f transition of Eu2+.When the doping concentration of Eu2+ ions is 0.01,the luminescence intensity of the sample reaches the maximum value.It is further proved that the exchange interaction results in the concentration quenching of Eu2+ in the Zn_(1-x)Al_2 O_4:xEu^(2+) phosphor powders.The thermal quenching property of ZnAl_2 O_4:Eu^(2+)phosphor was investigated and the quantum efficiency(QE) values of the selected Zn_(0.99)Al_2 O_4:0.01 Eu^(2+) phosphor was measured and determined as 54.85%.The lifetime of the optimized sample Zn_(0.99)Al_2 O_4:0.01 Eu^(2+) is 3.0852 μs and the CIE coordinate of the sample was calculated as(0.3323,0.5538) with high-color-purity green emission.All properties indicate that the green-emitting ZnAl_2 O_4:Eu^(2+) phosphor powder has potential application in white LEDs.Can He Haipeng Ji Zhaohui Huang Xiaoguang Zhang Yan'gai Liu Minghao Fang Xiaowen Wu Xin Min 2018Journal of Rare Earths2018,36,9:2
20Quantum-enhanced stochastic phase estimation with the Su(1,1)interferometer显示文摘Quantum stochastic phase estimation has many applications in the precise measurement of various physical parameters.Similar to the estimation of a constant phase,there is a standard quantum limit for stochastic phase estimation,which can be obtained with the Mach-Zehnder interferometer and coherent input state.Recently,it has been shown that the stochastic standard quantum limit can be surpassed with nonclassical resources such as squcezed light.However,practical methods to achieve quantum enhancement in the stochastic phase estimation remain largely unexplored.Here we propose a method utilizing the SU(1,1)interferometer and coherent input states to cstimate a stochastic optical phase.As an example,we investigate the Ornstcin-Uhlenback stochastic phase.We analyze the performance of this method for three key estimation problems:prediction,tracking,and smoothing.The results show significant reduction of the mean square error compared with the Mach-Zehnder interferometer under the same photon number flux inside the interferometers.In particular,we show that the method with the SU(1,1)interferometer can achieve fundamental quantum scaling,achieve stochastic Heisenberg scalinga and surpass the precision of the canonical measurement.KAIMIN ZHENG MINGHAO MI BEN WANG LANG XU LIYUN HU SHENGSHUAI LIU YANBO LOU JETAI JING LIJIAN ZHANG 2020Photonics Research2020,8,10:2
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