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1Impending HRT wave precursors to the Wenchuan M_s8.0 earthquake and methods of earthquake impending prediction by using HRT wave显示文摘We deployed four geo-electric monitoring stations in Sichuan and Yunnan provinces from 2004, using the new generation of equipment (PS-100) and technologies to capture the HRT wave earthquake precursor. Before the Wenchuan Ms8.0 earthquake, we recorded the HRT wave precursor at the only operating station in Hongge (HG, Δ=465 km) and found that significant impending signal had been recorded at the station in the early morning ( 0―5 am) of 12th of May, 2008. The precursor for this earthquake is consistent with precursors recorded for other strong earthquakes. The measured physical properties (geo-resistivity and telluric-current) show tidal wave period oscillations from several days to several months before the earthquakes and the amplitude of such HT oscillation increases significantly towards the occurrence of an earthquake. These HT and RT waves from the epicenter have a causal relationship with the earthquakes that happened several days later. The arrival time of two RT waves is proportional to the distance from the station to the epicenter. The estimated natural decay of the amplitude is correlated with the natural period (T0) of the earthquake fault, which is proportional to the fault length. From this relationship, we can predict the earthquake magnitude. For magnitude 6―9 earthquakes, the natural period is about 1―6 hours. Such oscillation comes from the epicenter area and they can propagate several thousand kilometers in the Earth's crust. Before a strong earthquake in the shallow crust, the conductive pore fluid will experience major changes before the fault rapture. Such fluid change will emit an oscillation in the pore fluid pressure. This is the mechanism for the HRT wave generation. Since the China Earthquake Administration funded the HRT wave short-term earth-quake prediction project in 2003, the first record of HRT precursor wave has been recorded from the 2004-12-26 Sumatra Mw9.0 earthquake with the largest epicentre distance Δ=2900 km. Thereafter, we have captured HRT waves from more than twenty strong earthquakes, which are well-matched and show repeatability, consistency and regularity. All our observation with the HRT waves demonstrate that HRT wave precursors to earthquakes indeed exist. Strong earthquakes can be predicted and short-term and impending earthquake prediction is achievable in the very near future. From all the observations, including the ones at HG station from Wenchuan Ms8.0 earthquake, we conclude that using HRT wave to predict earthquakes is feasible.QIAN FuYe ZHAO BiRu QIAN Wei ZHAO Jian HE ShiGen ZHANG HongKui LI ShiYu LI ShaoKun YAN GuLiang WANG ChengMin SUN ZhenKai ZHANG DongNing LU Jun ZHANG Ping YANG GuoJun SUN JiaLin GUO ChunSheng TANG YuXiong XU JianMing XIA KunTao JU Hang YIN BangHong LI Ming YANG DongSheng QI WeiLuo HE TaiMing GUAN HuaPing ZHAO YuLin 2009Science China Earth Sciences2009,52,10:8
2Risk-averse Market Clearing for Coupled Electricity, Natural Gas and District Heating System显示文摘Multiple energy carriers can be coupled as an Integrated Energy System (IES) through interconnection tech- nologies. Unexpected risks will be transferred with the growing coupling of energy systems, mainly stemming from the uncertain- ties in different energy sectors. It is imperative to coordinate the operation of different energy systems to improve energy efficiency and ensure energy security. With the close integration of different energy systems, it is necessary to couple these different energy markets to achieve the holistic energy supply economy. On the other hand, uncertainties in the energy systems will bring the financial risk for the operator of IES. A risk-averse stochastic market clearing model for the IES is proposed to study the operating strategy aiming at minimizing the operation cost. While the financial risk imposed by the wind power uncertainties is restricted to a predefined level. Simulations results are provided to verify that the proposed model can improve market efficiency and handle the trade-off between cost and risk.Haibing Wang Chengmin Wang Muhammad Qasim Khan Gengwu Zhang Ning Xie 2019CSEE Journal of Power and Energy Systems2019,5,2:6
3The Global Landscape of SARS-CoV-2 Genomes, Variants, and Haplotypes in 2019nCoVR显示文摘On January 22,2020,China National Center for Bioinformation(CNCB)released the 2019 Novel Coronavirus Resource(2019nCoVR),an open-access information resource for the severe acute respiratory syndrome coronavirus 2(SARS-CoV-2).2019nCoVR features a comprehensive integration of sequence and clinical information for all publicly available SARS-CoV-2 isolates,which are manually curated with value-added annotations and quality evaluated by an automated in-house pipeline.Of particular note,2019nCoVR offers systematic analyses to generate a dynamic landscape of SARS-CoV-2 genomic variations at a global scale.It provides all identified variants and their detailed statistics for each virus isolate,and congregates the quality score,functional annotation,and population frequency for each variant.Spatiotemporal change for each variant can be visualized and historical viral haplotype network maps for the course of the outbreak are also generated based on all complete and high-quality genomes available.Moreover,2019nCoVR provides a full collection of SARS-CoV-2 relevant literature on the coronavirus disease 2019(COVID-19),including published papers from PubMed as well as preprints from services such as bioRxiv and medRxiv through Europe PMC.Furthermore,by linking with relevant databases in CNCB,2019nCoVR offers data submission services for raw sequence reads and assembled genomes,and data sharing with NCBI.Collectively,SARS-CoV-2 is updated daily to collect the latest information on genome sequences,variants,haplotypes,and literature for a timely reflection,making 2019nCoVR a valuable resource for the global research community.2019nCoVR is accessible at http://gffzzdbc7b6aaae734bdds9kck5x9fn0oq69vn.ffgz.tsg.suse.edu.cn/ncov/.Shuhui Song Lina Ma Dong Zou Dongmei Tian Cuiping Li Junwei Zhu Meili Chen Anke Wang Yingke Ma Mengwei Li Xufei Teng Ying Cui Guangya Duan Mochen Zhang Tong Jin Chengmin Shi Zhenglin Du Yadong Zhang Chuandong Liu Rujiao Li Jingyao Zeng Lili Hao Shuai Jiang Hua Chen Dali Han Jingfa Xiao Zhang Zhang Wenming Zhao Yongbiao Xue Yiming Bao 2020Genomics, Proteomics & Bioinformatics2020,18,6:4
4Effects of copper mining on heavy metal contamination in a rice agrosystem in the Xiaojiang River Basin, southwest China显示文摘Metallic ore mining causes heavy metal pollution worldwide.However,the fate of heavy metals in agrosystems with long-term contamination has been poorly studied.Dongchuan District(Yunnan,southwest China),located at the middle reaches of the Xiaojiang River,is a well-known 2000-year-old copper mining site.In this work,a survey on soil heavy metal contents was conducted using a handheld X-ray fluorescence instrument to understand the general contamination of heavy metals in the Xiaojiang River Basin.Furthermore,river water,soil,and rice samples at six sites along the fluvial/alluvial fans of the river were collected and analyzed to implement an environmental assessment and an evaluation of irrigated agrosystem.V,Zn,and Cu soil levels(1724,1047,and 696mg·kg-1,respectively)far exceeded background levels.The geo-accumulation indexes(Igeo)showed that cultivated soils near the mining sites were polluted by Cd and Cu,followed by Zn,V,Pb,Cr,Ni,and U.The pollution index(Pi)indicated that rice in the area was heavily polluted with Pb,Cr,Cd,Ni,Zn,and Cu.The difference in orders of metal concentrations between the soil and rice heavy metal contamination was related to the proportion of bioavailable heavy metals in the soil.The crop consumption risk assessment showed that the hazard quotient exceeded the safe threshold,indicating a potential carcinogenic risk to consumers.The Nemerow integrated pollution index and health index indicated that the middle of the river(near the mining area)was the heaviest polluted site.Wanqiu Pu Jiaqi Sun Fangfang Zhang Xingyue Wen Wenhu Liu Chengmin Huang 2019Acta Geochimica2019,38,5:4
5Multidrug-resistant Proteus mirabilis isolates carrying blaOXA-1 and blaNDM-1 from wildlife in China:increasing public health risk显示文摘The emergence of multidrug resistance(MDR)in Proteus mirabilis clinical isolates is a growing public health concern and has serious implications for wildlife.What is the role of wildlife has been become one of the hot issues in disseminating antimicrobial resistance.Here,54 P.mirabilis isolates from 12 different species were identified.Among them,25 isolates were determined to be MDR by profile of antimicrobial susceptibility;10 MDR P.mirabilis isolates were subjected to comparative genomic analysis by whole genome sequencing.Comprehensive analysis showed that chromosome of P.mirabilis isolates mainly carries multidrug-resistance complex elements harboring resistance to carbapenem genes blaOXA-1,blaNDM-1,and blaTEM-1.Class I integron is the insertion hotspot of IS26;it can be inserted into type I integron at different sites,thus forming a variety of multiple drug resistance decision sites.At the same time,Tn21,Tn7,and SXT/R391 mobile elements cause widespread spread of these drug resistance genes.In conclusion,P.mirabilis isolates from wildlife showed higher resistance to commonly used clinic drugs comparing to those from human.Therefore,wild animals carrying MDR clinical isolates should be paid attention to by the public health.Qian KANG Xue WANG Jianan ZHAO Zhihui LIU Fang JI Han CHANG Jianchun YANG Shijia HU Ting JIA Xiaojia WANG Jiagui TANG Guoying DONG Guocheng HU Jing WANG Yanyu ZHANG Jianhua QIN Chengmin WANG 2021Integrative Zoology2021,16,6:4
6Phosphorylation inhibition of protein-tyrosine phosphatase 1B tyrosine-152 induces bone regeneration coupled with angiogenesis for bone tissue engineering显示文摘A close relationship has been reported to exist between cadherin-mediated cell-cell adhesion and integrin-mediated cell mobility,and protein tyrosine phosphatase 1B(PTP1B)may be involved in maintaining this homeostasis.The stable residence of mesenchymal stem cells(MSCs)and endothelial cells(ECs)in their niches is closely related to the regulation of PTP1B.However,the exact role of the departure of MSCs and ECs from their niches during bone regeneration is largely unknown.Here,we show that the phosphorylation state of PTP1B tyrosine-152(Y152)plays a central role in initiating the departure of these cells from their niches and their subsequent recruitment to bone defects.Based on our previous design of a PTP1B Y152 region-mimicking peptide(152RM)that significantly inhibits the phosphorylation of PTP1B Y152,further investigations revealed that 152RM enhanced cell migration partly via integrinαvβ3 and promoted MSCs osteogenic differentiation partly by inhibiting ATF3.Moreover,152RM induced type H vessels formation by activating Notch signaling.Demineralized bone matrix(DBM)scaffolds were fabricated with mesoporous silica nanoparticles(MSNs),and 152RM was then loaded onto them by electrostatic adsorption.The DBM-MSN/152RM scaffolds were demonstrated to induce bone formation and type H vessels expansion in vivo.In conclusion,our data reveal that 152RM contributes to bone formation by coupling osteogenesis with angiogenesis,which may offer a potential therapeutic strategy for bone defects.Yong Tang Keyu Luo Yin Chen Yueqi Chen Rui Zhou Can Chen Jiulin Tan Moyuan Deng Qijie Dai Xueke Yu Jian Liu Chengmin Zhang Wenjie Wu Jianzhong Xu Shiwu Dong Fei Luo 2021Bioactive Materials2021,6,7:3
7Broadband radio spectral observations of the solar eclipse on 2008-08-01 and its implications on the quiet Sun atmospheric model显示文摘Based on the joint-observations of the radio broadband spectral emissions of the solar eclipse on August 1, 2008 at Jiuquan (total eclipse) and Huairou (partial eclipse) at the frequencies of 2.00-5.60 GHz (Jiuquan), 2.60-3.80 GHz (Chinese solar broadband radiospectrometer, SBRS/Huairou), and 5.20-7.60 GHz (SBRS/Huairou), the authors assemble a successive series of broadband spectra with a frequency of 2.60-7.60 GHz to observe the solar eclipse synchronously. This is the first attempt to analyze the solar eclipse radio emission under the two telescopes located at different places with broadband frequencies in the periods of total and partial eclipses. With these analyses, the authors made a semiempirical model of the coronal plasma density of the quiet Sun, which can be expressed as ne 1.42×109(r-2+1.93r-5) (cm-3), in the space range of r=1.039-1.212 R , and made a comparison with the classic model.TAN BaoLin YAN YiHua ZHANG Yin TAN ChengMin HUANG Jing LIU YuYing FU QiJun CHEN ZhiJun LIU Fei CHEN LinJie JI GuoShu 2009Science China(Physics,Mechanics & Astronomy)2009,52,11:2
8Novel human H7N9 influenza virus in China显示文摘Outbreaks of H7N9 avian influenza in humans in 5 provinces and 2 municipalities of China have reawakened concern that avian influenza viruses may again cross species barriers to infect the human population and thereby initiate a new influenza pandemic.Evolutionary analysis shows that human H7N9 influenza viruses originated from the H9N2,H7N3 and H11N9 avian viruses,and that it is as a novel reassortment influenza virus.This ar­ticle reviews current knowledge on 11 subtypes of influenza A virus from human which can cause human infec­tions.Chengmin WANG Jing LUO Jing WANG Wen SU Shanshan GAO Min ZHANG Li XIE Hua DING Shelan LIU Xiaodong LIU Yu CHEN Yaxiong JIA Hongxuan HE 2014Integrative Zoology2014,9,3:2
9长期棉花秸秆还田和深松提高棉花产量的机理显示文摘我国有大量的滨海盐碱地资源尚未得到开发利用。优化滨海盐碱地改良和植棉技术有助于推动相关资源的开发利用。棉花秸秆还田和深松是常见的盐碱地土壤改良措施。其中,短期棉花秸秆还田可以提高滨海盐渍土棉花产量水平,深松可以切断土壤毛细管,抑制季节性返盐。杨子山(编译) Zhang Le Mao Lili Yan Xiaoyu Liu Chengmin Song Xianliang Sun Xuezhen 2022中国棉花2022,49,12:2
10OSCILLATION CRITERIA FOR SECOND ORDER NONLINEAR NEUTRAL PERTURBED DYNAMIC EQUATIONS ON TIME SCALES显示文摘In this paper,we discuss the oscillatory behavior of a class of nonlinear neutral perturbed dynamic equations on time scales.Some new oscillation criteria are obtained for such dynamic equations.Finally,an example that dwells upon the sharp conditions of our result is also included.Xiuping Yu 1,Hongyu Yang 2,Jianmei Zhang 1,Chengmin Hou 3 1.Dept.of Math.and Physics,Hebei Institute of Architecture and Civil Engineering,Zhangjiakou 075024,Hebei 2.Dept.of Mechanic and Engineering,Zhangjiakou Vocational Technology Institute,Zhangjiakou 075031,Hebei 3.Dept.of Math.,Yanbian University,Yanji 133002,Jilin, 2012Annals of Differential Equations2012,28,4:1
11ON DISCRETE SEQUENTIAL FRACTIONAL BOUNDARY VALUE PROBLEM WITH FRACTIONAL BOUNDARY CONDITIONS显示文摘In this paper we consider a discrete fractional boundary value problem(FBVP for short). We provide a delicate analysis for the property of Green's function. Our analysis motivates the study of discrete fractional boundary value problems with fractional boundary conditions. As an application, we give conditions under which such problems admit at least one positive solution. Our results extend the results presented in [4].Yu Zhang Chengmin Hou 2013Annals of Differential Equations2013,29,3:1
12Preparation and characterization of nanocrystalline Li4TisO,2 by sol-gel method显示文摘SHEN Chengmin ZHANG Xiaogang ZHOU Yingke 2002Materials Chemistry and Physics2002,78,:1
13Cancer-associated histone mutation H2BG53D disrupts DNA–histone octamer interaction and promotes oncogenic phenotypes显示文摘Dear Editor,Recent studies from us and others have deciphered the clinical relevance of a variety of oncohistones1 in different diseases.The H3K27M and H3K36M mutant histones exert dominant-negative effects on methylation levels of histone H3K27 and H3K36 on wildtype histone protein in pediatric brain cancers2–4 and chondroblastoma,5,6 respectively.In contrast to H3K27M and H3K36M that act in trans to cause global reduction of methylation at the respective residues,the H3G34 mutations,including H3G34V/R and H3G34W/L found in pediatric high-grade glioma and giant cell tumor of the bone,affect the H3K36 methylation in cis and alter the H3K36 methylation on the nucleosome containing the H3G34 mutation(s).Yi Ching Esther Wan Tsz Chui Sophia Leung Dongbo Ding Xulun Sun Jiaxian Liu Lina Zhu Tze Zhen Evangeline Kang Du Yang Yuchen Zhang Jitian Zhang Chengmin Qian Michael Shing Yan Huen Qing Li Maggie Zi Ying Chow Zongli Zheng Junhong Han Ajay Goel Xin Wang Toyotaka Ishibashi Kui Ming Chan 2020Signal Transduction and Targeted Therapy2020,5,1:1
14Preparation and characterization of nanocrystalline Li4 Ti5 O12 by sol-gel method显示文摘Shen Chengmin Zhang Xiaogang Zhou Yingke 2002J Mater Chem2002,78,:1
15Genetic analysis and ecological niche modeling delimit species boundary of the Przewalski’s scorpion(Scorpiones: Buthidae) in arid Asian inland显示文摘Reliable delimitation of venomous scorpions is not only consequential to toxicological studies but also instructive to conservation and exploration of these important medical resources.In the present study,we delimited species boundary for the the Przewalski’s scorpion from arid northwest China through a combined approach employing phylogenetic analysis,ecological niche modeling and morphological comparison.Our results indicate that the Przewalski’s scorpion represent an independent taxonomic unit and should be recognized as full species rank,Mesobuthus przewalskii stat.nov.This species and the Chinese scorpion M.martensii represent the eastern members of the M.caucasicus species group which manifests a trans-Central Asia distribution across the Tianshan Mountains range.We also discussed the likely geographic barrier and climatic boundary that demarcate distributional range of the the Przewalski’s scorpion.Xueshu Zhang Gaoming Liu Yu Feng Dexing Zhang Chengmin Shi 2020Zoological Systematics2020,45,2:1
16显示文摘Shen Chengmin Zhang Xiaogang Li Hulin 2001Materials Science and Engineering B2001,84,3:1
17Cobalt doped Fe-Mn@CNTs catalysts with highly stability for lowtemperature selective catalytic reduction of NO_(x)显示文摘In this paper,we report the fabrication of cobalt-doped de-NO_(x)catalyst by pyrolyzing an analogous metal-organic framework-74(MOF-74)containing Fe&Mn.The resulted catalyst exhibits distinctive microstructures of manganese,cobalt,and iron immobilized on N-doped carbon nanotubes(CNTs).It is found through experiments that the trimetallic catalyst Fe_(2)Mn_(1)Co_(0.5)/CNTs-50 has the best NH_(3)-selective catalytic reduction(SCR)performance.The Fe_(2)Mn_(1)Co_(0.5)/CNTs-50 exhibited excellent water and sulfur resistance and good stability under the harsh gas environment of 250℃ and/or 170℃,NO=NH_(3)=1,000 ppm,8 vol.%O_(2),20 vol.%H2O,1,000 ppm SO_(2),and gas hourly space velocity(GHSV)=75,000 h^(-1).The de-NO_(x)conversion was maintained about 55%and 25%after 192 h.The water and sulfur resistance performance were much higher than commercial vanadium series catalyst.The highly water and sulfur resistance performance may be attributed to the unique core-shell microstructure and the synergistic effect of manganese,cobalt,and iron which helps reduce the formation for byproducts(NH_(4)HSO_(4)).This study may promote to explore the development of a high stability catalyst for low-temperature selective catalytic reduction of NO_(x)with NH_(3).Pengfei Li Tiezhen Zhang Haixiao Sun Yufeng Gao Yanyuan Zhang Yuanyuan Liu Chengmin Ge Hao Chen Xiaoping Dai Xin Zhang 2022Nano Research2022,15,4:1
18CHARACTERISTICS OF Sq VARIATION OF GEOMAGNETIC FIELD AT THE GREAT WALL STATION, ANTARCTICA IN WINTER显示文摘In this paper the characteristics of Sq variation of geomagnetic field in the region of the Chinese Great Wall Station (CGWS), Antarctica, in winter are analyzed from geomagnetic data obtained at the Geomagnetic Observatory of CGWS. The result enables us to reveal the following aspects: (1) The pattern of Sq variation at CGWS in early (Apr.) and Late winter (Sep.) is similar to that at Beijing Geomagnetic Observatory (BJO) at the middle latitude in the Northern Hemisphere. It may be controlled by the midlatitudinal ionospheric dynamo current. Amplitude of Sq variation is very small, and the harmonics in 8 hours or shorter periods in midwinter (June and July) is predominant because of the decreased effect of solar ultraviolet radiation and the dominant geomagnetic disturbance at high latitudes. (2) The vectors of Sq-equivalent current in the daytime are about five times more than that in the night. The direction of the vectors is clockwise in the daytime (08-15h) and counterclockwise in the night inLiu Changfa, Zhang Ping Jiao Chengmin Institute of Geophysics, Academia Sinica, Beijing 100101 1991Chinese Journal of Polar Science1991,2,1:0
19Backgrounds Constrain on the Torsion Detection显示文摘The sources of torsion,macroscopic rotation and aligned spin are discussed.In the case of Dirac spin particle as a direct sensor for torsion f the detection of torsion-spin effect is cons trained by the larger backgrounds stronglyt which are magnetic-spin and rotation-spin.Increasing the source of the torsion is equivalent to increasing the background itself.So,the conclusion is that Dirac particle spectra experiments have no hope to give the evidence for torsion directly in some special torsion gravity theory.ZHANG Chengmin 1993Chinese Physics Letters1993,10,11:0
20Modulation of field emission by small AC signals显示文摘In a microwave tube the energy of electrons in an electron beam, which are usually generated by a thermionic cathode, is modulated such that it is transformed into electromagnetic wave energy. In this paper, we modulated the field emission using AC signals.A field emission current with AC components was attained by adding a small AC voltage to a high extracting DC voltage. We observed two phenomena related to the AC components of the field emission current. First, when the DC component of the extracting voltage was low, the current measured in the circuit was dominated by the displacement current. Second, besides the fundamental frequency component, higher order harmonics were also observed in the field emission current.YANG Jin ZHANG GengMin ZHOU HaiTao WEI JinDi CHEN YanHui SHEN ChengMin 2017Science China(Technological Sciences)2017,60,12:0
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