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Precipitation Microphysical Characteristics of Typhoon Ewiniar(2018) before and after Its Final Landfall over Southern China

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Advances in Atmospheric Sciences 2023年第6期40卷 1005-1020页

作者： Lu FENG hui xiao Xiantong LIU Sheng hu huiqi LI Liusi xiao xiao HAO Guangzhou Institute of Tropical and Marine Meteorology China Meteorological AdministrationGuangzhou 510641China Guangdong Provincial Key Laboratory of Regional Numerical Weather Prediction China Meteorological AdministrationGuangzhou 510641China Guangzhou Meteorological Observatory China Meteorological AdministrationGuangzhou 511430China

In this paper, the evolution of the microphysical characteristics in different regions(eyewall, inner core, and outer rainbands) and different quadrants [downshear left(DL), downshear right(DR), upshear left(UL), and upshear right(UR)]during the final landfall of Typhoon Ewiniar(2018) is analyzed using two-dimensional video disdrometer and S-band polarimetric radar data collected in Guangdong, China. Due to the different types of underlying surfaces, the periods before landfall(mainly dominated by underlying sea surface) and after landfall(mainly dominated by underlying land surface) are also analyzed. Both before landfall and after landfall, the downshear quadrants had the dominate typhoon precipitation. The outer rainbands had more graupel than the inner core, resulting in a larger radar reflectivity, differential reflectivity, specific differential phase shift, and mass-weighted mean diameter below the melting layer. Compared with other regions, the eyewall region had the smallest mean logarithmic normalized intercept parameter before landfall and the smallest mean mass-weighted mean diameter and the largest mean logarithmic normalized intercept parameter after landfall. The hydrometeor size sorting was obvious in the eyewall and inner core(especially in the eyewall) after landfall. A high concentration of large raindrops fell in the DL quadrant, and more small raindrops fell in the UR quadrant. Although the icephase process and warm rain process were both important in the formation of tropical cyclone precipitation, the warm rain process(ice-phase process) contributed more liquid water before landfall(after landfall). This investigation provides a reference for improving the microphysical parameterization scheme in numerical models.

关键词： tropical cyclone precipitation microphysics raindrop size distribution southern China

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Constitutive modeling of a directionally solidified nickel-based superalloy DZ125 subjected to thermal mechanical creep fatigue loadings

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Rare Metals 2019年第10期38卷 922-936页

作者： xiao-An hu xiao-Guang Yang Duo-Qi Shi hui-Chen Yu Ting-Ting Ren School of Energy and Power Engineering Beihang UniversityBeijing 100191China Science and Technology on Advanced High Temperature Structural Materials Laboratory Beijing Institute of Aeronautical MaterialsBeijing 100095China Air Force Armament Department China Aviation MuseumBeijing 102211China

A transversely isotropic continuum elasto-viscoplasticity model,which was developed from Chaboche’s unified constitutive model,was formulated to capture the thermal mechanical creep fatigue deformation behavior of a directionally solidified nickel-based superalloy.A fourthorder tensor was introduced to model material *** order to model the tertiary creep behavior,the Kachanov damage evolution equation was coupled into the stress *** on the test results of uniaxial tensile,fatigue,and creep loadings at isothermal temperature conditions,the material parameters are *** mechanical fatigue(TMF) and creep-fatigue interaction test results were used to verify the robustness of the ***,strain-temperature-dependent stress-strain responses under TMF loadings were analyzed using the present *** strain-controlled conditions,both of the stress ranges and mean stresses are strongly influenced by the strain-temperature phases,a key parameter for TMF tests.

关键词： Constitutive Thermal mechanical fatigue Creep Viscoplastic Superalloy

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Sulfolane‑Based Flame‑Retardant Electrolyte for High‑Voltage Sodium‑Ion Batteries

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Nano-Micro Letters 2025年第2期17卷 498-516页

作者： Xuanlong He Jie Peng Qingyun Lin Meng Li Weibin Chen Pei Liu Tao huang Zhencheng huang Yuying Liu Jiaojiao Deng Shenghua Ye Xuming Yang Xiangzhong Ren xiaoping Ouyang Jianhong Liu Biwei xiao Jiangtao hu Qianling Zhang Graphene Composite Research Center College of Chemistry and Environmental EngineeringShenzhen UniversityShenzhen 518060People’s Republic of China Center of Electron Microscopy State Key Laboratory of Silicon and Advanced Semiconductor MaterialsSchool of Materials Science and EngineeringZhejiang UniversityHangzhou 310027People’s Republic of China GRINM(Guangdong)Research Institute for Advanced Materials and Technology FoshanGuangdong 528051People’s Republic of China College of Energy Engineering Zhejiang UniversityHangzhouZhejiang 310027People’s Republic of China School of Materials Science and Engineering Xiangtan UniversityXiangtan 411105People’s Republic of China Shenzhen Eigen-Equation Graphene Technology Co.Ltd Shenzhen 518000People’s Republic of China

Sodium-ion batteries hold great promise as next-generation energy storage ***,the high instability of the electrode/electrolyte interphase during cycling has seriously hindered the development of *** particular,an unstable cathode–electrolyte interphase(CEI)leads to successive electrolyte side reactions,transition metal leaching and rapid capacity decay,which tends to be exacerbated under high-voltage ***,constructing dense and stable CEIs are crucial for high-performance *** work reports localized high-concentration electrolyte by incorporating a highly oxidation-resistant sulfolane solvent with non-solvent diluent 1H,1H,5H-octafluoropentyl-1,1,2,2-tetrafluoroethyl ether,which exhibited excellent oxidative stability and was able to form thin,dense and homogeneous *** excellent CEI enabled the O3-type layered oxide cathode NaNi_(1/3)Mn_(1/3)Fe_(1/3)O_(2)(NaNMF)to achieve stable cycling,with a capacity retention of 79.48%after 300 cycles at 1 C and 81.15%after 400 cycles at 2 C with a high charging voltage of 4.2 *** addition,its nonflammable nature enhances the safety of *** work provides a viable pathway for the application of sulfolane-based electrolytes on SIBs and the design of next-generation high-voltage electrolytes.

关键词： Sodium-ion batteries Sulfolane-based electrolyte High voltage Layered oxide cathode Flame retardant

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Reflection and Refraction of Waves Across an Interface of Two-phase Flow

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Acta Mathematicae Applicatae Sinica 2021年第1期37卷 137-147页

作者： Kai hu hui KAN Chun-lei TANG xiao-zhou YANG School of Mathematics and Statistics Southwest UniversityChongqing 400715China Wuhan Institute of Physics and Mathematics Chinese Academy of SciencesWuhan 430071China

We investigate a hyperbolic system of one-dimensional isothermal fluid with liquid-vapor phase *** refraction-reflection phenomena are intensively analyzed when elementary waves travel across the two-phase *** apply the characteristic method and hodograph transform of Riemann to reduce the nonlinear PDEs to a concise *** for the case of incident rarefaction wave,reduced linear equations are convenient to solve by Laplace *** an integral formula in wave interaction region is derived in this paper,instead of the hypergeometric functions solutions for non-isothermal polytropic *** is also observed that when incident waves travel from the vapor phase to the liquid phase,the refracted waves must be accelerated and move forward.

关键词： p-system two-phase fluid Hodograph transform Volterra equation

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The procalcitonin-to-cortisol ratio is a potential prognostic predictor in sepsis with abdominal source:a retrospective observational study

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World Journal of Emergency Medicine 2022年第6期13卷 441-447页

作者： hui Liu Jie hu Jian-guo xiao Hong-jun Kang Fei-hu Zhou Department of Critical Care Medicine the First Medical CenterChinese PLA General HospitalBeijing 100853China

BACKGROUND:The aim of the study was to investigate the procalcitonin-to-cortisol ratio(P/C ratio)as a prognostic predictor among septic patients with abdominal ***:We retrospectively enrolled 132 post-surgery patients between 18 and 90 years old with sepsis of the abdominal *** the second day of sepsis onset,cortisol,procalcitonin(PCT),Acute Physiology and Chronic Health Evaluation(APACHE)II score,Sequential Organ Failure Assessment(SOFA)score,C-response protein(CRP),and other baseline characteristics were *** addition,the length of ICU stay,length of mechanical ventilation(MV)days,length of shock days,and 28-day mortality were also *** analysis was performed to screen potential risk *** analysis was used to identify the interaction among the risk *** analysis was also utilized to demonstrate the relationship between the risk factors and *** receiver operator characteristic(ROC)curve analysis was conducted to evaluate the risk factors.A restricted cubic spline(RCS)demonstrated the association between survival outcome and the P/C ratio ***:A total of twenty-nine patients died,and 103 patients survived within 28 *** were significant differences in cortisol,PCT,P/C ratio,interleukin(IL)-6,SOFA,and APACHE II scores between the survival and non-survival *** significant interaction was observed in the stratified *** regression analysis revealed that P/C ratio(P=0.033)was significantly related to 28-day *** on ROC curves,P/C ratio(AUC=0.919)had a higher AUC value than cortisol or *** analysis depicted a positive relationship between survival possibility and P/C ratio ***:P/C ratio might be a potential prognostic predictor in septic patients with abdominal sources.

关键词： Sepsis Cortisol Procalcitonin Procalcitonin-to-cortisol ratio Adrenal insufficiency

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Simulation of radiation damages in molybdenum by combining molecular dynamics and OKMC

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Nuclear Science and Techniques 2017年第1期28卷 12-19页

作者： Gui-Yan Wu Neng-Wen hu hui-Qiu Deng Shi-Fang xiao Wang-Yu hu Department of Applied Physics School of Physics and Electronics Hunan University Changsha 410082 China Department of Materials Science and Engineering Hunan University Changsha 410082 China

In this paper,radiation defects in bcc molybdenum with the primary knock-on atom(PKA) energies of2-40 keV are simulated by the molecular *** binding energy of single point defect-to-defect clusters increases with the cluster *** stabiUty and mobility of point defects and defect clusters are *** interstitial-type clusters are found to be easily migrating along the direction with low barriers(0.01-0.10 eV).Then,the object kinetic Monte Carlo is used to gain insight into the long-term defect evolution in the *** simulation results indicate that Stage I almost occurs at annealing temperature of 100K,which corresponds to the correlated recombination resulting from the motion of small interstitial clusters(n ≤2).The formation of substage partly as result of the small vacancy clusters *** about 460 K,the Stage II starts because of uncorrected recombination due to an emitting mechanism of larger *** distribution of the clusters at the cascade quenching stage is positively correlated with the PKA energies,affecting notably the subsequent annealing process.

关键词： Displacement cascades Molybdenum Defects Computer simulation

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Sperm of rosy barb (Puntius conchonius) as an in vitro assay system of nonylphenol cytotoxicity

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Journal of Environmental Sciences 2006年第3期18卷 417-419页

作者： xiao Qin ZHANG Shi-cui hu Jia-hui XU Yu-yan Department of Marine Biology Ocean University of China Qingdao 266003 China. Department of Life Science Liaocheng University Liaocheng 252059 China

Nonylphenol （NP） is the final degradation product of alkylphenol polyethoxylates （APEs）, which are widely present in plastics, papers, pulp, detergents, pesticides, herbicides, paints and cosmetics. It is estimated that annual global production of APEs is about 500000 t, 60% of which eventually ends up in aquatic ecosystems primarily via wastewater （So16 et cd., 2000）. NP is resistant to biodegradation and persistent in the environment （Arukwe et al., 2000）.

关键词： motility nonylphenol rosy barb sperm ultrastructure

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Spatial channel pairing based coherent combining for relay networks

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Frontiers of Information Technology & Electronic Engineering 2016年第9期17卷 938-945页

作者： Feng Shu xiao-hui huANG Jin-song hu Ting-ting LIU Ri-qing CHEN xiao-hu YOU Jun LI Jin WANG College of Computer and Information Sciences Fujian Agriculture and Forestry University School of Electronic and Optical Engineering Nanjing University of Science and Technology National Key Laboratory of Electromagnetic Environment China Research Institute of Radiowave Propagation National Mobile Communications Research Laboratory Southeast University

In this paper, spatial channel pairing(SCP) is introduced to coherent combining at the relay in relay networks. Closed-form solution to optimal coherent combining is derived. Given coherent combining, the approximate SCP solution is presented. Finally, an alternating iterative structure is developed. Simulation results and analysis show that, given the symbol error rate and data rate, the proposed alternating iterative structure achieves signal-to-noise ratio gains over existing schemes in maximum ratio combining(MRC) plus matched filter,MRC plus antenna selection, and distributed space-time block coding due to the use of SCP and iterative structure.

关键词： Spatial channel pairing Coherent combining Alternating iterative structure Symbol error rate Distributed space-time block coding

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A new variable-mode control strategy for LLC resonant converters operating in a wide input voltage range

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Frontiers of Information Technology & Electronic Engineering 2017年第3期18卷 410-422页

作者： hui-pin LIN xiao-guang JIN Liang XIE Jin hu Zheng-yu LU College of Electrical Engineering Zhejiang UniversityHangzhou 310027China

This paper proposes a new variable-mode control strategy that is applicable for LLC resonant converters operating in a wide input voltage range. This control strategy incorporates advantages from full-bridge LLC resonant converters, half-bridge LLC resonant converters, variable-frequency control mode, and phase-shift control mode. Under this control strategy, different input voltages determine the different operating modes of the circuit. When the input voltage is very low, it works in a full-bridge circuit and variable frequency mode(FB_VF mode). When the input voltage rises to a certain level, it shifts to a full-bridge circuit and phase-shifting control mode(FB_PS mode). When the input voltage further increases, it shifts into a half-bridge circuit and variable frequency mode(HB_VF mode). Such shifts are enabled by the digital signal processor(DSP), which means that no auxiliary circuit is needed, just a modification of the software. From light load to heavy load, the primary MOSFET for the LLC resonant converter can realize zero-voltage switching(ZVS), and the secondary rectifier diode can realize zero-current switching(ZCS). With an LLC resonant converter prototype with a 300 W rated power and a 450 V output voltage, as well as a resonant converter with 20–120 V input voltage, the experiments verified the proposed control strategy. Experimental results showed that under this control strategy, the maximum converter efficiency reaches 95.7% and the range of the input voltage expands threefold.

关键词： LLC Full bridge Half bridge Variable frequency Phase shift Wide input voltage range

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A Locating Method for Reliability-Critical Gates with a Parallel-Structured Genetic Algorithm

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Journal of Computer Science & Technology 2019年第5期34卷 1136-1151页

作者： Jie xiao Zhan-hui Shi Jian-hui Jiang Xu-hua Yang Yu-Jiao huang Hai-Gen hu College of Computer Science and Technology Zhejiang University of TechnologyHangzhou 310023China School of Software Engineering Tongji UniversityShanghai 201804China

The reliability allowance of circuits tends to decrease with the increase of circuit integration and the application of new technology and materials, and the hardening strategy oriented toward gates is an effective technology for improving the circuit reliability of the current situations. Therefore, a parallel-structured genetic algorithm (GA), PGA, is proposed in this paper to locate reliability-critical gates to successfully perform targeted hardening. Firstly, we design a binary coding method for reliability-critical gates and build an ordered initial population consisting of dominant individuals to improve the quality of the initial population. Secondly, we construct an embedded parallel operation loop for directional crossover and directional mutation to compensate for the deficiency of the poor local search of the GA. Thirdly, for combination with a diversity protection strategy for the population, we design an elitism retention based selection method to boost the convergence speed and avoid being trapped by a local optimum. Finally, we present an ordered identification method oriented toward reliability-critical gates using a scoring mechanism to retain the potential optimal solutions in each round to improve the robustness of the proposed locating method. The simulation results on benchmark circuits show that the proposed method PGA is an efficient locating method for reliability-critical gates in terms of accuracy and convergence speed.

关键词： gate-level circuit reliability locating reliability-critical gate parallel-structured genetic algorithm directing strategy scoring mechanism

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