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18篇 您的检索式:作者名="Pingzhi ZHANG"
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1Key techniques for 5G wireless communications:network architecture, physical layer,and MAC layer perspectives显示文摘The fourth generation(4G) mobile communication systems are offering service worldwide steadily.Although 4G systems could be loaded with much more services and data than previous systems, there is still a dramatic gap between the people's practical requirements and what can be offered by the 4G technologies.Consequently, the research and development for the fifth generation(5G) systems have already been started. This article presents an overview of potential network architecture and highlights several promising techniques which could be employed in the future 5G systems. These techniques include non-orthogonal multiple access(NOMA),massive multiple input and multiple output(MIMO), cooperative communications and network coding, full duplex(FD), device-to-device(D2D) communications, millimeter wave communications, automated network organization, cognitive radio(CR), and green communications. The state-of-art and implementation issue of these techniques are also addressed.MA Zheng ZHANG ZhengQuan DING ZhiGuo FAN PingZhi LI HengChao 2015Science China(Information Sciences)2015,58,4:49
2The Tuerkubantao ophiolite melange in Xinjiang,NW China:New evidence for the Erqis suture zone显示文摘The extension of the suture zone between the Siberian and Kazakhstan continents in China has been a matter of debate because few outcrops of ophiolitic melange have been found so far.The recently found Tuerkubantao ophiolitic melange,which is located east of the Kekesentao Mt.in the Buerjin County of the Chinese Altay,provides an important clue for this problem.This paper presents the results of field investigation,petrology,U-Pb isotope dating of zircons and bulk-rock geochemistry of the Tuerkubantao melange rocks.The melange consists of fault-contacted ultramafic rocks,gabbro, diabase,basalt,flysch and granitoids.The ultramafic-mafic rocks are Mg-rich(Mg~#=4.25—6.35) and w(SiO_2) spans 38.8%—46.8%.Basalt and gabbro are geochemically similar and are characterized by low w(FeO^t)(10.9%),total alkali w(Na_2O+K_2O)=2.58%) and w(TiO_2)(1.17%) and affinity to the Mg-rich tholeiite series.The flat REE and trace-element patterns of the ultramafic-mafic rocks are indicative of their ophiolite origin,i.e.,formation in a mid-oceanic ridge setting.The fragments of low-K gneissic granite formed in suprasubduction or syn-collisional setting.Zircons from gabbro and gneissic granite yielded U-Pb ages of 363 and 355 Ma.respectively,suggesting Late Devonian mid-oceanic spreading and oceanic subduction accompanied by suprasubduction magmatism.The Tiierkubantao ophiolite together with the Qiaoxiahala and Buergen ophiolites of the Kekesentao belt define an ophiolitic melange belt extending along the Erqis fault.This belt probably belongs to the Ural-Zaisan -South Mongolian suture-shear zone formed during the subduction of the Paleo-Asian Ocean and subsequent collision of the Siberian and Kazakhstan continents.Yuwang Wang Jingbin Wang Lijuan Wang Lingli Long Pingzhi Tang Zhen Liao Huiqiong Zhang Yu Shi 2012Geoscience Frontiers2012,3,5:9
3On the diophantine equation X^2-(1+a^2)Y^4 =-2a显示文摘Let a≥1 be an integer.In this paper,we will prove the equation in the title has at most three positive integer solutions.YUAN PingZhi 1 & ZHANG ZhongFeng 2 1 School of Mathematics,South China Normal University,Guangzhou 510631,China 2 School of Mathematics & Computational Science,Sun Yat-Sen University,Guangzhou 510275,China 2010Science China Mathematics2010,53,8:7
4Genome-wide association mapping of vitamins B1 and B2 in common wheat显示文摘Vitamin B is essential for maintaining normal life activities in humans and animals who have to intake the microelement from the outside, especially from cereal products. In the present study 166 Chinese and foreign wheat cultivars planted in two environments were characterized for variation in vitamin B1 and B2 contents. A genome-wide association study(GWAS) using the wheat 90 K SNP assay identified 17 loci for vitamin B1 and 7 for vitamin B2 contents. Linear regression analysis showed a significantly positive correlation of the number of favorable alleles with vitamin B1 and B2 contents. Marker-trait associations(MTAs) at IWB43809(6AS, 0cM) and IWB69903(6AS, 13cM) were new and stable, and significantly associated with vitamin B1 content across two environments. The loci identified in this study and associated SNP markers could be used for improvement of vitamin B1 and B2 contents to obtain superior quality along with grain yield in wheat.Jieyun Li Jindong Liu Wei'e Wen Pingzhi Zhang Yingxiu Wan Xianchun Xia Yan Zhang Zhonghu He 2018The Crop Journal2018,6,3:4
5A Survey on Low Complexity Detectors for OTFS Systems显示文摘The newly emerging orthogonal time frequency space(OTFS)modulation can ob⁃tain delay-Doppler diversity gain to significantly improve the system performance in high mobility wireless communication scenarios such as vehicle-to-everything(V2X),high-speed railway and unmanned aerial vehicles(UAV),by employing inverse symplectic finite Fouri⁃er transform(ISFFT)and symplectic finite Fourier transform(SFFT).However,OTFS modu⁃lation will dramatically increase system complexity,especially at the receiver side.Thus,de⁃signing low complexity OTFS receiver is a key issue for OTFS modulation to be adopted by new-generation wireless communication systems.In this paper,we review low complexity OTFS detectors and provide some insights on future researches.We firstly present the OTFS system model and basic principles,followed by an overview of OTFS detector structures,classifications and comparative discussion.We also survey the principles of OTFS detection algorithms.Furthermore,we discuss the design of hybrid OTFS and orthogonal frequency di⁃vision multiplexing(OFDM)detectors in single user and multi-user multi-waveform commu⁃nication systems.Finally,we address the main challenges in designing low complexity OT⁃FS detectors and identify some future research directions.ZHANG Zhengquan LIU Heng WANG Qianli FAN Pingzhi 2021ZTE Communications2021,19,4:3
6Genome-wide analysis of the WRKY gene family in physic nut ( Jatropha curcas L.)显示文摘Wangdan Xiong Xueqin Xu Lin Zhang Pingzhi Wu Yaping Chen Meiru Li Huawu Jiang Guojiang Wu 2013Gene2013,,2:2
7The Pumilio RNA-binding protein APUM24 regulates seed maturation by fine-tuning the BPM-WRI1 module in Arabidopsis显示文摘Pumilio RNAbindingproteinsparticipateinmes-senger RNA(mRNA)degradation and t ranslational repression,but their roles in plant development are largely unclear.Here,we show that Arabidopsis PUMILIO PROTEIN24(APUM24),an atypical Pumiliohomology domaincontaining protein,plays an im-portant part in regulating seed maturation,a major stage of plant development.APUM24 is strongly expressed in maturing seeds.Reducing APUM24 expression resulted in abnormal seed maturation,wrinkled seeds,and lower seed oil contents,and APUM24 knockdown resulted in lower levels of WRINKLED 1(WRI1),a key transcription factor con-trolling seed oil accumulation,and lower expression of WRI1 target genes.APUM24 reduces the mRNA stability of BTB/POZMATH(BPM)family genes,thus decreasing BPM protein levels.BPM is responsible for the 26S proteasomemediated degradation of WRI1 and has important functions in plant growth and development.The 3′untranslated regions of BPM family genes contain putative Pumilio response elements(PREs),which are bound by APUM24.Re-duced BPM or increased WRI1 expression rescued the decient seed maturation of apum242 knock-down mutants,and APUM24 overexpression re-sulted in increased seed size and weight.Therefore,APUM24 is crucial to seed maturation through its action as a positive regulatornetuning the BPMWRI1 module,making APUM24 apromising target for breeding strategies to increase crop yields.Ruihua Huang Mengling Liu Guanping Gong Pingzhi Wu Barunava Patra Ling Yuan Hongting Qin Xiaoxu Wang Guohe Wang Huimei Liao Lu Gao Chengwei Yang Hongqing Li Shengchun Zhang 2021Journal of Integrative Plant Biology2021,63,7:2
8Study on Fungi Belonging to Fusarium Link in Ningxia Hui Autonomous Region显示文摘[Objective]This paper was to identify fungi belonging to Fusarium Link. [Method] The fungal species, distribution and the diseases caused by Fusarium Link in Ningxia Hui Autonomous Region were determined by the methods of field investigation, collection, isolated culture and identification.[Result]Nine species of fungi belonging to Fusarium Link were identified, including F. avenaceum, F. concolor, F. culmorum, F. graminearum, F. moniliforme, F. nivale, F. oxysporum, F. solani, and one unnamed species. They were distributed throughout Ningxia Hui Autonomous Region and caused more than 30 kinds of plant diseases.[Conclusion]Fusarium Link had many species in Ningxia Hui Autonomous Region without regional features, and all of them were plant pathogens.Ruiqing SHEN Ping ZHANG Chengjin GUO Lirong ZHANG Pingzhi KANG 2012Plant Diseases and Pests2012,3,2:2
9New Delay Doppler Communication Paradigm in 6G Era:A Survey of Orthogonal Time Frequency Space(OTFS)显示文摘In the 6G era,Space-Air-Ground Integrated Network(SAGIN)are anticipated to deliver global coverage,necessitating support for a diverse array of emerging applications in high-mobility,hostile environments.Under such conditions,conventional orthogonal frequency division multiplexing(OFDM)modulation,widely employed in cellular and Wi-Fi communication systems,experiences performance degradation due to significant Doppler shifts.To overcome this obstacle,a novel twodimensional(2D)modulation approach,namely orthogonal time frequency space(OTFS),has emerged as a key enabler for future high-mobility use cases.Distinctively,OTFS modulates information within the delay-Doppler(DD)domain,as opposed to the timefrequency(TF)domain utilized by OFDM.This offers advantages such as Doppler and delay resilience,reduced signaling latency,a lower peak-to-average ratio(PAPR),and a reduced-complexity implementation.Recent studies further indicate that the direct interplay between information and the physical world in the DD domain positions OTFS as a promising waveform for achieving integrated sensing and communications(ISAC).In this article,we present an in-depth review of OTFS technology in the context of the 6G era,encompassing fundamentals,recent advancements,and future directions.Our objective is to provide a helpful resource for researchers engaged in the field of OTFS.Weijie Yuan Shuangyang Li Zhiqiang Wei Yuanhao Cui Jiamo Jiang Haijun Zhang Pingzhi Fan 2023China Communications2023,20,6:2
10Analysis and Evaluation of Grain Quality in Main Wheat Production Areas of Anhui Province显示文摘In order to clarify the status of grain quality in the main wheat production areas of Anhui Province,wheat quality sampling and testing were carried out in the main wheat production areas of Anhui Province in 2015,26 cultivars and 62 samples were collected,and grain traits,quality indexes and quality traits were analyzed and evaluated.The average bulk density of the sample was 796 g/L; the average hardness index was 49.2; the average 1 000-grain weight was 41.6 g; the average grain moisture content was 11.8%; the average crude protein content was 11.7%; the average wet gluten content was 31.1%; the average Zeleny sedimentation value was 24 m L; the average water absorption was 54.9%; the average stability time was 5.6 min.The crude protein content of 35.5% samples reached the standard of high quality weak gluten; the wet gluten content of 40.3% samples was above the second grade of high quality strong gluten; the falling number of 83.9% of the samples reached the national standard of high quality wheat; the stability time of 27.4% of the samples reached higher than the second grade of high quality gluten,and the stability time of 17.7% samples reached the standard of high quality weak gluten wheat.Qiqi ZHANG Yingxiu WAN Wenxin CAO Yan LI Yao LI Pingzhi ZHANG 2018Asian Agricultural Research2018,10,7:1
11SD-pair shell model calculation of even-even Mo isotopes显示文摘Zhang Ruiping Luo Yan'an Ning Pingzhi 2006Euro phys Lett2006,73,:1
12Quantifying novel sequence variation and selective advantage in synthetic hexa-ploid wheat and their backcross-derived lines using SSR markers 显示文摘Zhang Pingzhi Dreisigacker S Melchinger A E 2005Molecular Breeding2005,15,1:1
13Problems of PGE metallogenesis related to mafic-ultramafic complexes in North Xinjiang,China显示文摘Platinum group element(PGE) mineralization is mostly related to mafic—ultramafic complexes of the dominant magmatic deposit type.Mineralization of this type mainly relies on two conditions:the abundance of PGE in magma,and the presence of mechanisms favorable to PGE enrichment and separation from sulfur-saturated magma during magmatic evolution.Mafic—ultramafic complexes are widely developed in North Xinjiang,including(1) the large-scale copper-nickel deposits of Kelatongke,Huangshan,Huangshan East,and Tulargen,(2) numerous small to medium-sized coppernickel deposits such as Xiangshan,Tudun.Hulu.Baishiquan.and(3) the Xiangshan West and Weiya medium-sized V—Ti magnetite deposits.However,mafic—ultramafic complexes in North Xinjiang rarely form PGE deposits.Therefore,questions about PGE metallogenesis in North Xinjiang are discussed in this paper from the standpoint of the ore-forming mechanism of PGE deposits and the characteristics of the North Xinjiang magma sources.The rock types of the post-collisional mafic—ultramafic complexes in North Xinjiang are of a ferrous rock series formed by fractional crystallization,a rock type generally favorable for hosting PGE.For the Cu-Ni sulfide deposits of North Xingjiang,the assimilation of crustal material causes sulfide liquation during processes of magmatic evolution and mineralization.This canYuwang Wang Jingbin Wang Lijuan Wang Lingli Long Zhen Liao Huiqiong Zhang Pingzhi Tang 2011Geoscience Frontiers2011,2,2:1
14Qannfifying novel sequence variation and selective advantage in synthetic hexaploid wheats and their backcross-derived lines using SSR markers显示文摘Zhang Pingzhi Dreisigacker S Melchinger AE 2005 2005Molecular Breeding2005,15,:1
15A study of particle number fluctuation under BCS theory显示文摘Particle number fluctuations in BCS theory are studied with the relativistic mean-field theory and the shell effects of particle number fluctuations are first discovered. By analyzing the relative errors of the particle number fluctuations, we find that the particle number fluctuations are relevant with the odd-even character. We later apply this method to the examination of the new shell structure, showing that N = 184 for the neutron is indeed a new closed shell.DING BinGang NING PingZhi ZHANG DaLi LU DingHui 2007Science China(Physics,Mechanics & Astronomy)2007,50,2:0
16Performances of an air thermal energy utilization system developed with fan-coil units in large-scale plastic tunnels covered with external blanket显示文摘To improve the problem of low temperature at night in winter due to the lack of thermal storage in large-span plastic tunnels,an air thermal energy utilization system(ATEUS)was developed with fan-coil units to heat a large-scale plastic tunnel covered with an external blanket(LPTEB)on winter nights.The ATEUS was composed of nine fan-coil units mounted on top of the LPTEB,a water reservoir,pipes,and a water circulation pump.With the heat exchange between the air and the water flowing through the coils,the thermal energy from the air can be collected in the daytime,or the thermal energy in the water can be released into the LPTEB at night.On sunny days,the collected thermal energy from the air in the daytime(E_(c))and released thermal energy at night(E_(r))were 0.25-0.44 MJ/m^(2) and 0.24-0.38 MJ/m^(2),respectively.Used ATEUS as a heating system,its coefficient of performance(COP),which is the ratio of the heat consumption of LPTEB to the power consumption of ATEUS,ranged from 1.6-2.1.A dynamic model was also developed to simulate the water temperature(T_(w)).Based on the simulation,E_(c) and E_(r) on sunny days can be increased by 60%-73%and 38%-62%,respectively,by diminishing the heat loss of the water reservoir and increasing the indoor air temperature in the period of collecting thermal energy.Then,the COP can reach 2.6-3.8,and the developed ATEUS can be applied to heating the LPTEB in a way that conserves energy.Chengji Zong Zibin Xiao Weitang Song Pingzhi Wang Guifang Zhang Ming Li 2022International Journal of Agricultural and Biological Engineering2022,15,5:0
17INTRUSION DETECTION BASED ON THE SECOND-ORDER STOCHASTIC MODEL显示文摘This paper presents a new method based on a second-order stochastic model for computer intrusion detection.The results show that the performance of the second-order stochastic model is better than that of a first-order stochastic model.In this study,different window sizes are also used to test the performance of the model.The detection results show that the second-order stochastic model is not so sensitive to the window size,comparing with the first-order stochastic model and other previous researches.The detection result of window sizes 6 and 10 is the same.Zhang Xiaoqiang Zhu Zhongliang Fan Pingzhi 2007Journal of Electronics(China)2007,24,5:0
18Orthogonal Time Frequency Space Modulation in 6G Era显示文摘Over the past decades, wireless technologies with reliable data transmissions and precise sensing ability in hostile environments are much less understood and significantly under-developed. The DD domain waveform, e.g., orthogonal time frequency space(OTFS), has been recognized globally for its great potential to achieve high-reliable communications and robust sensing performance under various channel conditions in 6G era.Weijie Yuan Zhiqing Wei Jiamo Jiang Shun Zhang Jinhong Yuan Pingzhi Fan 2023China Communications2023,20,1:0
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