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Wide-field aurora imager onboard Fengyun satellite:Data products and validation

Earth and Planetary Physics 2021年第1期5卷 73-78页

作者： GuangXing Ding JiaWei Li XiaoXin Zhang Fei he LingPing he KeFei Song Liang Sun Shuang Dai ShiJie Liu Bo Chen Chao Yu XiuQing Hu SongYan Gu ZhongDong Yang Peng Zhang Changchun Institute of Optics Fine Mechanics and PhysicsChinese Academy of SciencesChangchun 130033China Key Laboratory of Space Weather National Center for Space WeatherChina Meteorological AdministrationBeijing 100081China Key Laboratory of Earth and Planetary Physics Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China Institutions of Earth Science Chinese Academy of SciencesBeijing 100029China College of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijing 100049China State Key Laboratory of Applied Optics Chinese Academy of SciencesChangchun 130033China

New observations of auroras based on the wide-field aurora imager(WAI)onboard Fengyun-3D(FY-3D)satellite are exhibited in this *** of the WAI data is analyzed by comparing auroral boundaries derived from WAI observations with results obtained from data collected by the Special Sensor Ultraviolet Spectrographic Imager(SSUSI)aboard the Defense meteorological Satellite Program(DmSP F18).Dynamic variations of the aurora with the solar wind,interplanetary magnetic field(ImF)parameters,and the SYm-H index are also *** comparison of auroral boundaries indicates that the WAI data are morphologically valid and suitable to the study of auroral *** responses to solar wind parameters indicate that the WAI data can be useful to monitor and predict the Earth’s space *** the configuration of aurora is a good indicator of the solar wind–magnetosphere–ionosphere(SW-m-I)coupling system,and can reflect the disturbance of the space environment,the WAI will provide important data to help us to study the physical processes in space.

关键词： WAI FY-3D auroral dynamics SSUSI SW-m-I

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Self-Floating Efficient Solar Steam Generators Constructed Using Super-Hydrophilic N,O Dual-Doped Carbon Foams from Waste Polyester

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Energy & Environmental materials 2022年第4期5卷 1204-1213页

作者： Huiying Bai Ning Liu Liang Hao Panpan he Changde ma Ran Niu Jiang Gong Tao Tang Key Laboratory of material Chemistry for Energy Conversion and Storage Ministry of EducationHubei Key Laboratory of Material Chemistry and Service FailureHubei Engineering Research Center for Biomaterials and Medical Protective MaterialsSchool of Chemistry and Chemical EngineeringHuazhong University of Science and TechnologyWuhan 430074China State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China

Solar evaporation is recognized as a prospective technique to produce freshwater from non-drinkable water using inexhaustible solar ***,it remains a challenge to fabricate low-cost solar evaporators with obviously reduced water evaporation enthalpy to achieve high evaporation ***,N,O dual-doped carbon foam(NCF)is fabricated from the lowtemperature carbonization of poly(ethylene terephthalate)(PET)waste by melamine/molten salts at 340℃.During carbonization,melamine reacts with carboxylic acids of PET degradation products to yield a crosslinking network,and then molten salts catalyze the decarboxylation and dehydration to construct a stable *** to rich N,O-containing groups,3D interconnected pores,super-hydrophilicity,and ultra-low thermal conductivity(0.0599 W m^(−1) K^(−1)),NCF not only achieves high light absorbance(ca.99%)and solar-to-thermal conversion,but also promotes the formation of water cluster to reduce water evaporation enthalpy by ca.37%.Consequently,NCF exhibits a high evaporation rate(2.4 kg m^(−2) h^(−1)),surpassing the-state-of-the-art solar evaporators,and presents good antiacid/basic abilities,long-term salt-resistance,and self-cleaning ***,a large-scale NCF-based outdoor solar desalination device is developed to produce *** daily freshwater production amount per unit area(6.3 kg)meets the two adults’daily water *** trash-to-treasure strategy will give impetus to the development of low-cost,advanced solar evaporators from waste plastics for addressing the global freshwater shortage.

关键词： carbon foam solar desalination solar energy solar steam generator waste plastics

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Evaluation of the geopotential value W_0^(LVD) of China

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Geodesy and Geodynamics 2017年第6期8卷 408-412页

作者： Lin he Yonghai Chu Nan Yu School of Geodesy and Geomatics Wuhan University Wuhan 430079 China Key Laboratory of Geospace Environment and Geodesy Ministry of Education Wuhan 430079 China Guangxi Key Laboratory of Spatial Information and Geomatics China

Estimation of the zero-height geopotential value W_0^（LVD） for the CVD（China Vertical Datum） plays a fundamental role in the connection of traditional height reference systems into a global height *** the W_0^（LVD） of China is based on the computation of the mean geopotential offset between the value W_0= 62636856.0 m^2 s^（-2）, selected as reference in this study, and the unknown geopotential value W_0^（LVD）. This estimation is based on the combination of ellipsoidal heights, levelled heights（referring to the CVD）, and some physical parameters, such as geopotential values, gravity values, and geoid *** geoid undulations derived from the GGm（Global Geopotential models）. This combination is performed through three approaches： The first one is based on the theory of molodensky, and the second one compares levelled heights and geopotential values derived from the GGms, while the third one analyses the differences between GPS/Levelling and GGms geoid undulations. The approaches are evaluated at 65 benchmarks（Bms） covered around Qingdao where the tide gauge is used to observe the local mean sea level of China. The results from three approaches are very similar. Furthermore, the W_0^（LVD）determined for the China local vertical datum was 62636852.9462 m^2 s^（-2）, indicates a bias of about3.0538 m^2/s^（-2） compared to the conventional value of 62636856.0 m^2 s^（-2）.

关键词： Global geopotential models GPS/Levelling Bms hina vertical datum Local vertical datum Zero-height geopotential

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A neutron diffraction investigation of high valent doped barium ferrite with wideband tunable microwave absorption

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Journal of Advanced Ceramics 2022年第2期11卷 263-272页

作者： Jun LI Yang HONG San he Weike LI Han BAI Yuanhua XIA Guangai SUN Zhongxiang ZHOU School of Physics Harbin Institute of TechnologyHarbin 150001China heilongjiang Provincial Key Laboratory of Plasma Physics and Application Technology Harbin Institute of TechnologyHarbin 150001China School of Chemistry and Chemical Engineering Harbin Institute of TechnologyHarbin 150001China Key Laboratory for Neutron Physics of CAEP Institute of Nuclear Physics and ChemistryMianyang 621999China

The barium ferrite BaTi_(x)Fe_(12−x)O_(19)(x=0.2,0.4,0.6,0.8)(BFTO-x)ceramics doped by Ti4+were synthesized by a modified sol–gel *** crystal structure and magnetic structure of the samples were determined by neutron diffraction,and confirm that the BFTO-x ceramics were high quality single phase with sheet *** x increasing from 0.2 to 0.8,the saturation magnetization(m_(s))decreases gradually but the change trend of coercivity(H_(c))is complex under the synergy of the changed grain size and the magnetic crystal anisotropy *** on the high valence of Ti^(4+),double resonance peaks are obtained in the curves of the imaginary part of magnetic conductivity(μ′′)and the resonance peaks could move toward the low frequency with the increase of x,which facilitate the samples perform an excellent wideband modulation microwave absorption *** the x=0.2 sample,the maximum reflection loss(RL)can reach−44.9 dB at the thickness of only 1.8 mm,and the bandwidth could reach 5.28 GHz at 2 mm when RL is less than−10 *** the BFTO-x ceramics show excellent frequency modulation ability varying from 18(x=0.8)to 4 GHz(x=0.4),which covers 81%of the investigated frequency in microwave absorption *** work not only implements the tunable of electromagnetic parameters but also broadens the application of high-performance microwave absorption devices.

关键词： barium ferrite neutron diffraction microwave absorption

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Fracture mechanism of inversed trapezoidal shaped tunnel excavated in 45° inclined rock strata

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International Journal of mining Science and Technology 2015年第4期25卷 531-535页

作者： he manchao Peng Yanyan Zhao Shuaiyang Shi Haiyang Wang Ning Gong Weili School of mechanics and Civil Engineering China University of Mining & Technology State Key Laboratory for Geomechanics & Deep Underground Engineering College of Geoscience and Surveying Engineering China University of Mining & Technology

In order to understand failure mechanisms of the tunnel excavated in the stratified rock masses in deep mine, the physical modeling experiment by using the large-scale model was carried out. The field case simulated in the experiment is a main connection tunnel located at depth of 1000 m in Qishan coal mine,Xuzhou mining district. Tunnel deformation was monitored by using strain gauges and a video camera simultaneously. Crack initiation and propagation process during the test were analyzed based on image analysis of the captured video photographs. At the same time, deformation process of the key monitoring points around the tunnel section is given by the monitored strain plots. Under the increasing external loads, crack initiation occurs firstly on the left wall of the tunnel, then on the immediate *** failure of the tunnel occurs as a result of the slippage of the rock layers along the interfaces.

关键词： Stratified rock mass Inclination Crack propagation Strain analysis Physical modeling

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Fluorobenzene diluted low-density electrolyte for high-energy density and high-performance lithium-sulfur batteries

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Journal of Energy Chemistry 2022年第5期31卷 752-761页

作者： Zhilong Han Shuping Li mengjun Sun Renjie he Wei Zhong Chuang Yu Shijie Cheng Jia Xie State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074HubeiChina School of Physics Huazhong University of Science and TechnologyWuhan 430074HubeiChina State Key Laboratory of materials Processing and Die&mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074HubeiChina

The mass fraction of electrolytes is the crucial factor affecting the energy density of lithium-sulfur(Li-S)batteries. Due to the high porosity within the C/S cathode, high concentration of polysulfides, and side reaction in lithiun metal anode under lean electrolyte, it is extremely challenging to improve performance while reducing the electrolyte volume. here, we report a novel electrolyte with relatively low density(1.16 g cm^(-2)), low viscosity(1.84 m Pa s), and high ionic conductivity, which significantly promotes energy density and cyclability of Li-S batteries under practical conditions. moreover, such electrolyte enables a hybrid cathode electrolyte interphase(CEI) and solid electrolyte interface(SEI) layer with plentiful Li F, which leads to fast kinetics of ions transport and stable cyclability even under low *** to Li-S batteries in electrolyte employing 1,1,2,2-tetrafluoroethyl 2,2,3,3-tetrafluoropropyl ether(TTE) diluent, the ultra-thick cathode(20 mg cm^(-2)) shows a high capacity of 9.48 m Ah cm^(-2)and excellent capacity retention of 80.3% over 191 cycles at a low electrolyte-to-sulfur ratio(E/S = 2) and negative-to-positive capacity ratio(N/P = 2.5), realizing a 19.2% improvement in energy density in coin cells(from 370 to 441 Wh kg^(-1)) and a high energy density up to 467 Wh kg^(-1) in pouch cells. This study not only provides guidance for the electrolyte design but also paves the way for the development of high performance Li-S batteries under practical conditions.

关键词： High energy density Lithium-sulfur battery Thick sulfur electrode Lean electrolyte Low-density electrolyte

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波段外10.6 μm激光辐照下光导型HgCdTe探测器的电学响应

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强激光与粒子束 2010年第12期22卷 2829-2833页

作者：贺元兴江厚满 College of Opto-Electronic Science and Engineering National University of Defense Technology Changsha 410073 China

利用描述半导体内热载流子效应的1维能量平衡模型,对波段外10.6μm激光辐照下光导型HgCdTe探测器的电学响应进行了数值模拟。结果表明:在激光开始辐照和停止辐照瞬间,探测器电阻的快速变化是由载流子温度的迅速变化引起的;在激光辐照过... 详细信息

利用描述半导体内热载流子效应的1维能量平衡模型,对波段外10.6μm激光辐照下光导型HgCdTe探测器的电学响应进行了数值模拟。结果表明:在激光开始辐照和停止辐照瞬间,探测器电阻的快速变化是由载流子温度的迅速变化引起的;在激光辐照过程中以及激光停照后,探测器电阻的缓慢变化是由晶格温度的缓慢变化进而导致载流子温度发生缓慢变化所致。模拟结果与对实验曲线的定性分析得出的结论一致。

关键词：波段外激光辐照光导 HgCdTe探测器电学热载流子效应温度能量平衡模型慢变数值模拟实验曲线模拟结果快速变化定性分析电阻体内描述晶格过程半导

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A dsRNA-degrading nuclease(dsRNase2)limits RNAi efficiency in the Asian corn borer(Ostrinia furnacalis)

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Insect Science 2021年第6期28卷 1677-1689页

作者： Yun-he Fan Hui-Fang Song mureed Abbas Yan-Li Wang Tao Li En-Bo ma Anastasia m.W.Cooper Kristopher Silver Kun Yan Zhu Jian-Zhen Zhang Institute of Applied Biology Shanxi UniversityTaiyuanChina College of Life Science Shanxi UniversityTaiyuanChina Faculty of Biological Science and Technology Changzhi UniversityChangzhiShanxiChina Department of Entomology Kansas State UniversityManhattanKansasUSA

The efficiency of RNA interference(RNAi)varies substantially among different insect *** degradation of double-stranded RNA(dsRNA)by dsRNA-degrading nucleases(dsRNases)has been implicated to cause low RNAi efficiency in several insect *** this study,we identified four dsRNase genes(OfdsRNaseL Ofd-sRNase2,OfdsRNase3 and OfdsRNase4)from the Asian corn borer(Ostrinia furnacalis)transcriptome *** analyses showed that each deduced protein sequence contained endonuclease NS domains and signal *** expression analysis revealed that OfdsRNase2 was exclusively expressed in the midgut of *** efficiency was investigated in 2-d-old fifth-instar larvae(high expression of dsRNase2)and 2-d-old pupae(low expression of dsRNase2)by feeding or injecting dsRNA targeting a marker gene that encodes the lethal giant larvae protein(OfLgl).Our results showed that OfLgl only partially silenced the expression of OfLgl in pupae,but not in larvae,suggesting that OfdsRNase2 could contribute to lower RNAi efficiency in larval *** hypothesis was supported by our RNAi-of-RNAi experiment using a tissue culture technique where the silencing efficiency against the reporter gene,Ofhexl,was significantly improved after knockdown of *** double luciferase assays were performed to evaluate the role of the four dsRNases in vitro,only OfdsRNase2 expressed in S2 cells significantly affected RNAi efficiency by degrading *** together,our results suggested that the degradation of dsRNA by OfdsRNase2 in the midgut contributed to low RNAi efficiency in *** larvae.

关键词： dsRNase Ostrinia furnacalis RNA interference RNAi efficiency tissue culture

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Bifunctional Liquid metals Allow Electrical Insulating Phase Change materials to Dual-mode Thermal manage the Li-Ion Batteries

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Nano-micro Letters 2022年第12期14卷 224-238页

作者： Cong Guo Lu he Yihang Yao Weizhi Lin Yongzheng Zhang Qin Zhang Kai Wu Qiang Fu College of Polymer Science and Engineering State Key Laboratory of Polymer Materials EngineeringSichuan UniversityChengdu 610065People’s Republic of China Department of Polymer Science and Engineering School of Chemical EngineeringNanjing University of Science and TechnologyNanjing 210094People’s Republic of China

Phase change materials(PCms)are expected to achieve dual-mode thermal management for heating and cooling Li-ion batteries(LIBs)according to real-time thermal conditions,guaranteeing the reliable operation of LIBs in both cold and hot ***,we report a liquid metal(Lm)modified polyethylene glycol/Lm/boron nitride PCm,capable of dual-mode thermal managing the LIBs through photothermal effect and passive thermal *** geometrical conformation and thermal pathways fabricated through ice-template strategy are conformable to the LIB’s structure and heat-conduction ***,soft and deformable Lms are modified on the boron nitride surface,serving as thermal bridges to reduce the contact thermal resistance among adjacent fillers to realize high thermal conductivity of 8.8 and 7.6 W m^(−1) K^(−1) in the vertical and in-plane directions,*** addition,Lm with excellent photothermal performance provides the PCm with efficient battery heating capability if employing a controllable lighting *** a proof-of-concept,this PCm is manifested to heat battery to an appropriate temperature range in a cold environment and lower the working temperature of the LIBs by more than 10℃ at high charging/discharging rate,opening opportunities for LIBs with durable working performance and evitable risk of thermal runaway.

关键词： Phase change materials Liquid metal Thermal conductivity Photothermal conversion Battery thermal management

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Designing g-C_(3)N_(4)/N-Rich Carbon Fiber Composites for High-Performance Potassium-Ion Hybrid Capacitors

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Energy & Environmental materials 2021年第4期4卷 638-645页

作者： Qing Shen Pengjie Jiang Hongcheng he Yanhong Feng Yong Cai Danni Lei mengqiu Cai ming Zhang Key Laboratory for micro/Nano Optoelectronic Devices of ministry of Education Hunan Provincial Key Laboratory of Low-Dimensional Structural Physics and DevicesSchool of Physics and ElectronicsHunan UniversityChangsha 410082China State Key Laboratory of Optoelectronic materials and Technologies School of Materials Science and EngineeringSun Yat-Sen(Zhongshan)UniversityGuangzhou 510275China Synergetic Innovation Center for Quantum Effects and Applications(SICQEA) Hunan Normal UniversityChangsha 410081China

Potassium-based energy storage devices(PEDS)are considered as hopeful candidates for energy storage applications because of the abundant potassium resources in nature and high mobility in the *** carbon materials show great potential for potassium-ion storage,poor rate performance,and unsatisfactory cycle lifespan in existing carbon-based PIBs anode,it also cannot match the dynamics and stability of the capacitor *** doping has been proven to be a effective modification strategy to improve the electrochemical performance of carbon ***,we prepare carbon nanofibers and g-C_(3)N_(4)composites with high nitrogen contents(19.78 at%);moreover,the sum of pyrrolic N and pyridinic N is up to 59.51%.It achieves high discharge capacity(391 m Ah g^(-1)at0.05 A g^(-1)),rate capacity(141 m Ah g^(-1)at 2 A g^(-1)),and long cycling performance(201 m Ah g^(-1)at 1 A g^(-1)over 3000 cycles)when as an anode for ***,it can deliver promising discharge capacity of132 m Ah g^(-1)at 0℃.moreover,as battery anode for potassium-ion hybrid capacitors(PIHC)device with an active carbon cathode,it delivers energy/power density(62 and 2102 W kg^(-1))as well as high reversible capacity(106 m Ah g^(-1)at 1 A g^(-1)).

关键词： carbon nitride pyrrolic n pyridinic n potassiumion battery potassium-ion hybrid capacitor

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