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Dielectric permittivity of dusty plasma in the Earth's mesosphere

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Earth and Planetary Physics 2021年第1期5卷 117-120页

作者： Hui Li jian wu National Key Laboratory of Electromagnetic Environment(LEME) China Research Institute of Radio Wave PropagationQingdao 266109China

This paper deals with the dielectric permittivity of dusty plasma in the earth’s *** give expressions for the complex dielectric permittivity of dusty plasma,taking into account the effects of the dust charging process and magnetic *** discuss the dielectric permittivity of dusty plasma in several cases,such as high frequency approximation,parallel propagation in MF/HF band,and effects of plasma ***,the expressions are employed to study the phenomenon of radar echoes from the polar summer *** report that dielectric permittivity caused by the dust charging process gives a radar cross section proportional to ω–4 and produces a number density of charged dust that agrees with measurements of mesopheric radar echoes.

关键词： dusty plasma dielectric permittivity polar summer mesosphere

OPTICAL INTERCONNECTION NETWORKS FOR CLOUD DATA CENTERS

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China Communications 2015年第8期12卷 I0002-I0003页

作者： wu jian currently a full Professor in State Key Laboratory of Information Photonics and Optical Communications Beijing

The rise of Cloud Computing and Big Data has created the need for morepowerful warehouse-scale cloud data centers,which usually comprise hundreds of thousands ofservers with highaccess bandwidth(>10Gb/s)or more,and cost-effective intra-and interdata center networks(DCNs)to provide switching and interconnect among all ***,the current DCNs sufferfrom limited throughput,large latencies and highpower consumption,and will not be able to sustainthe projected future DCN traffic demandswithout consuming excessive amounts of power.

关键词：光互连网络数据中心成本效益 NS公司功率消耗服务器吞吐量带宽

FLOW REGIMES BELOW AERATORS FOR DISCHARGE TUNNELS

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Journal of Hydrodynamics 2012年第3期24卷 378-382页

作者： MA Fei wu jian-hua College of Water Conservancy and Hydropower Engineering Hohai University Nanjing 210098 China

The flow regimes below an aerator influence directly the air entrainment and the cavitation damage control. Based on the theoretical considerations, the experiments of the aerator for a discharge tunnel were conducted, and the relationships between the flow regime and hydraulic and geometric parameters were investigated. The results showed that, there are two kinds of threshold values for the flow regime conversions. One is Fr1-2 standing for the conversion from the fully filled cavity to the partially filled cavity, and the other is Fr2-3 which shows the change from the partially filled cavity to the net air cavity. Two empirical expressions were obtained for the conversions of the flow regimes, which can be used in the designs of the aerators.

关键词： aerator discharge tunnel flow regime filling water jet length

Comparison of basic features and origins of oolitic shoal reservoirs between carbonate platform interior and platform margin locations in the Lower Triassic Feixianguan Formation of the Sichuan Basin,southwest China

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Petroleum Science 2012年第4期9卷 417-428页

作者： Tan Xiucheng Zhao Luzi Luo bing jiang Xingfu Cao jian Liu Hong Li Ling wu Xingbo Nie Yong State Key Laboratory of Oil and Gas Geology and Exploitation Southwest Petroleum University Chengdu Sichuan610500 China School of Resource and Environment Southwest Petroleum University Chengdu Sichuan 610500 China Branch of Exploration Management PetroChina Southwest Oil and Gas Field Company Chengdu Sichuan 610051 China Branch Station in Research Institute of Petroleum Exploration and Development Post-doctoral Workstation of PetroChinaSouthwest Oil and Gas Field Company Chengdu Sichuan 610051 China Branch of Exploration Industry PetroChina Southwest Oil and Gas Field Company Chengdu Sichuan 610051 China Department of Earth Sciences Nanjing University Jiangsu 210093 China

The oolitic shoal reservoirs of the Lower Triassic Feixianguan Formation carbonates in the Sichuan Basin of southwest China are an important target for gas exploration in the *** occurrence,like other cases worldwide,can be divided into two locations in general,i.e.,platform interior and platform margin *** differences of reservoir features and origins,however,have not been investigated comprehensively due to different exploration *** issue is addressed in this paper,to provide basic data and information for the basin＇s hydrocarbon exploration and for the study of carbonate platform sedimentology and reservoir geology *** compared the features of these two types of reservoirs in detail,including the depositional and diagenetic features,pore types and petrophysical *** on the comparison,the origin of the reservoirs was further *** is shown that the reservoirs in platform interior and platform margin locations differ *** interior carbonates were deposited in moderate to high energy settings and the dominant lithologic type was limestone,which was weakly compacted and intensely cemented and has undergone meteoric *** types include intragranular dissolution and moldic pores,with low porosities（6%） and low permeabilities（0.1 mD）.By contrast,the platform margin carbonates were deposited in relatively high energy settings and mainly consisted of dolostones with some *** rocks were strongly compacted but incompletely *** a result,some primary intergranular pores were *** meteoric solution and burial solution have taken *** are various types of pore spaces including intergranular and intercrystalline solution pores and residual intergranular *** type of reservoir generally has better petrophysical properties（9% porosity and 0.1 mD permeability） and pore-throat structures than the interior *** differences were influenced by both primar

关键词： Carbonate platform oolitic shoal reservoir platform margin platform interior Lower Triassic Feixianguan Formation Sichuan Basin China

Phosphorus Biogeochemical Cycle Research in Mountainous Ecosystems

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Journal of Mountain Science 2013年第1期10卷 43-53页

作者： wu Yan-hong ZHOU Jun YU Dong SUN Shou-qin LUO Ji bing Hai-jian SUN Hong-yang Key Laboratory of Mountain Surface Processes and Ecological Regulation Institute of Mountain Hazards and EnvironmentChinese Academy of Sciences

Phosphorus(P),as a limiting nutrient,plays a crucial role in the mountainous ecosystem *** biogeochemical cycle in mountainous ecosystems determines the bioavailability and sustainable supply of P,and thus becomes a crucial process which needs to be fully understood and described for ecological and environmental ***,most of research about P biogeochemical processes has been carried out in aquatic environment and agronomic field,but rare researches have been done in mountain *** the present review,we summarize researches on P biogeochemical cycle concerning mountain ecosystem in recent decades,including rock weathering,the release,transformation and bioavailability of P,interactions between the P biological cycle and microbial and plant life,as well as the development of *** on the state of art,we propose the future work on this direction,including the integration of all these research,the development of a practical model to understand the P biogeochemical cycle and its bioavailability,and to provide a reference for ecological and environmental conservation of mountainous ecosystems and lowland aquatic systems.

关键词： Phosphorus Biogeochemical cycle Weathering Microbe and plant Model Mountainous ecosystem

Electroacupuncture modulates the activity of the hippocampus-nucleus tractus solitarius-vagus nerve pathway to reduce myocardial ischemic injury

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Neural Regeneration Research 2018年第9期13卷 1609-1618页

作者： Shuai Cui Kun Wang Sheng-bing wu Guo-Qi Zhu jian Cao Yi-Ping Zhou Mei-Qi Zhou Research Institute of Acupuncture and Meridian Anhui University of Chinese Medicine Clinical Medical College of Acupuncture Moxibustion and RehabilitationGuangzhou University of Chinese Medicine Key Laboratory of Xin' An Medicine Ministry of EducationAnhui University of Chinese Medicine Department of Science and Technology Anhui University of Chinese Medicine

The hippocampus is involved in the regulation of the autonomic nervous system,together with the hypothalamus and brainstem nuclei,such as the paraventricular nucleus and nucleus tractus *** vagus nerve-nucleus tractus solitarius pathway has an important role in cardiovascular reflex *** ischemia has been shown to cause changes in the autonomic nervous system,affecting the dynamic equilibrium of the sympathetic and vagal ***,it remains poorly understood how the hippocampus communicates with brainstem nuclei to regulate the autonomic nervous system and alleviate myocardial ischemic tissue damage.A rat model of acute myocardial ischemia（AMI） was made by ligating the left anterior descending branch of the coronary *** days before ischemia,the hippocampal CA1 region was ***,3 days after ischemia,electroacupuncture（EA） at Shenmen（HT7）-Tongli（HT5） was performed（continuous wave,1 m A,2 Hz,duration of 30 minutes）.Cluster analysis of firing patterns showed that one type of neuron was found in rats in the sham and AMI *** types of neurons were observed in the AMI ＋ EA *** types of neurons were found in the AMI ＋ EA ＋ Lesion *** analysis showed that the frequency of vagus nerve discharge in each group was negatively correlated with heart rate（HR）（P 〈 0.05,r =-0.424）,and positively correlated with mean arterial pressure（MAP）（P 〈 0.05,r = 0.40987） and the rate-pressure product（RPP）（P 〈 0.05,r = 0.4252）.The total frequency of the nucleus tractus solitarius discharge in each group was positively correlated with vagus nerve discharge（P 〈 0.01,r = 0.7021）,but not with hemodynamic index（HR： P 〉 0.05,r =-0.03263; MAP： P 〉 0.05,r =-0.08993; RPP： P 〉 0.05,r =-0.03263）.Some neurons（Neuron C） were negatively correlated with vagus nerve discharge,HR,MAP and RPP in the AMI ＋ EA group（vagus nerve discharge： P 〈 0.05,r =-0.87749; HR： P 〈 0.01,r =-0.91902; MAP： P 〈 0.05,r =-0.85691; RPP： P 〈 0.01,r =-0.91902）

关键词： nerve regeneration acute myocardial ischemia hippocampus nucleus tractus solitarius vagus nerve discharge electroacupuncture Shenmen (HT7) Tongli (HTS) autonomic nerve neural regeneration

The Maximum Lagrangian of 5-uniform Hypergraphs without Containing Two Edges Intersecting at a Vertex

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Acta Mathematica Sinica,English Series 2022年第5期38卷 877-889页

作者： Biao wu Yue jian PENG MOE-LCSM School of Mathematics and StatisticsHu’nan Normal UniversityChangsha 410081P.R.China School of Mathematics Hu’nan UniversityChangsha 410082P.R.China

Obtaining Turán densities of hypergraph through determining Lagrangian densities have been studied *** showed that the Lagrangian density of an r-uniform hypergraph equals the Turán density of the extension of this ***,Lagrangian density and Turán density are the same for a large class of hypergraphs such as hypergraphs covering *** Pr,sbe the r-uniform hypergraph with two edges intersecting at s *** determined the Lagrangian densities of Pr,sfor r=3 and s=1 or 2,or r=4 and s=2 or *** and Keevash determined for r=3 and s=0,and Bene Watts,Norin and Yepremyan determined for r≥4 and s=*** cases r=5 and s=4 or r=6 and s=5 were determined by Norin and *** showed for r=5,6 or 7,and s=3,4 or 5 *** cases r=4 and s=1 or r=5 and s=2 were determined by jiang,Peng and wu,and Hu,Peng and wu *** r=5,the only remaining case is s=*** this paper,we determine for this case.

关键词： Hypergraph Lagrangian Turán number

Structural characteristics of electrohydrodynamic jets induced by a blade-plane actuator subjected to highly non-uniform electric fields:Parametric investigation through the particle image velocimetry techniques

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High Voltage 2023年第1期8卷 183-195页

作者： Zelu Yan Christophe Louste Philippe Traoré jian wu jian'an Fang Logistics Engineering College Shanghai Maritime UniversityShanghaiChina Institut PPRIME Universitéde PoitiersPoitiersFrance Key Laboratory of Aerospace Thermophysics School of Energy Science and EngineeringHarbin Institute of TechnologyHarbinChina College of Information Science and Technology Donghua UniversityShanghaiChina

This study set out to systematically investigate the structural characteristics of plane electrohydrodynamic jets through the particle image velocimetry(PIV)*** to the wide range of applied voltages and electrode gaps under various experimental conditions,an assessment of the image quality and a statistical analysis of the velocity fields are first performed to ensure the validity of the PIV measurements,which were originally applied purely to fluid *** results indicate that the time interval between two consecutive images should be pre-adjusted to reduce the number of uncorrelated vector ***,the minimum number of instantaneous fields should be achieved for an accurate calculation of the time-averaged *** equivalent electric field criterion adapted to the asymmetric electrode configuration is defined to find similarities in flow structures under different voltage and electrode gap *** the applied electric field increases,three injection regimes are identified and the current increases almost linearly,indicating a large conduction current *** decrease in charge density due to recombination proves to be relevant in all cases of this *** to the parametric analysis approach for classical jets and thermal plumes,the evolution of the coefficients of axial velocity,half-width and turbulence intensity are investigated.

关键词： plane particle blade

Quantitative determination of multi-class bioactive constituents for quality assessment of ten Anoectochilus, four Goodyera and one Ludisia species in China

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Chinese Herbal Medicines 2020年第4期12卷 430-439页

作者： Yan-bin wu Meng-chao Peng Chao Zhang jian-guo wu bing-zhu Ye Jun Yi Jin-zhong wu Cheng-jian Zheng School of Pharmacy Fujian University of Traditional Chinese MedicineFuzhou 350122China Department of Pharmacognosy School of PharmacyNaval Medical UniversityShanghai 200433China Department of Science Fujian Institute of EducationFuzhou 350001China

Objective:To establish multi-class bioactive constituents’determination of ten Anoectochilus,four Goodyera and one Ludisia species,and provide reference for the improvement of their quality ***:HPLC-ELSD and phenol–sulphuric acid methods were used for the quantitative determination of lactone glycosides(kinsenoside and its diastereoisomer,goodyeroside A)and polysaccharides,respectively,while an efficient iHPLC–MS/MS method was established for rapid determination of other minor constituents in ten Anoectochilus species and five related ***:The contents of kinsenoside,goodyeroside A,polysaccharides and flavonoids varied notably almost in all tested samples,including both wild plants and tissue *** particular,kinsenoside was the major lactone glycoside in ***,***,***,***,*** and ***,whereas goodyeroside A was the predominant constituent in ***,***,***,***,***,***,***,*** and Ludisia ***:Our present study suggested that ***,***,***,***,Ludisia discolor and Goodyera species cannot be used as alternatives for ***,and goodyeroside A may be reasonably used as a diagnostic marker for distinguishing *** from ***,***,*** and ***,Goodyera and Ludisia *** established method thus could be potentially used for the quality evaluation and control of Anoectochilus and some related species.

关键词： Anoectochilus specie goodyeroside A kinsenoside quality evaluation quantitative analysis