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Multi-scale climate variations and mechanisms of the onset and withdrawal of the South China Sea summer monsoon

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Science China Earth Sciences 2022年第6期65卷 1030-1046页

作者： Wen CHEN peng hu Jingliang huANGFU Center for Monsoon System Research Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100190China College of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijing 100049China

The onset of the South China Sea summer monsoon(SCSSM) heralds the establishment of the large-scale East Asian summer monsoon and the western North Pacific summer monsoon, as well as the beginning of the major rainy season. The occurrence of an early or late SCSSM onset is an important indicator for the summertime climate anomalies over East and Southeast Asia. Therefore, the onset of the SCSSM has received extensive research attention, and has been one of the key foci of monsoon research in recent decades. This paper reviews the multi-scale climate variations(from interdecadal to synoptic scales)and mechanisms of the SCSSM onset, with special attention paid to the progress in the past five years. On the interdecadal timescale, the SCSSM onset underwent a significant advancement in the mid-to-late 1990s, which may have been related to the background condition of the Pacific Ocean. On the interannual timescale, El Ni?o-Southern Oscillation(ENSO) is considered to be the most critical factor controlling the variability of the SCSSM onset. However, the linkage between ENSO and the SCSSM onset has become much weaker and insignificant in recent years. The intraseasonal oscillations(including the 30–60-day oscillation and quasi-biweekly oscillation) are important modulators of the SCSSM onset. The transition from an inactive phase to an active phase may be more worthy of attention than the phase itself. There appear to be close interactions between the SCSSM onset and synoptic-scale systems like tropical cyclones(TCs). TCs are important triggers for the SCSSM onset, while in return the SCSSM onset provides a favorable background condition for the formation and development of TCs. In addition, this paper also reviews a series of recent works on the withdrawal of the SCSSM. Finally, to close the paper, some important scientific issues worthy of further investigation are put forward.

关键词： South China Sea summer monsoon onset Multi-scale variations El Ni?o-Southern Oscillation Intraseasonal oscillation Tropical cyclone

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Enhancing Differential Evolution with Commensal Learning and Uniform Local Search

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Chinese Journal of Electronics 2017年第4期26卷 725-733页

作者： peng hu WU Zhijian DENG Changshou State Key Laboratory of Software Engineering School of Computer Wuhan University School of Information Science and Technology Jiujiang University

Differential evolution(DE) is a popular and powerful evolutionary algorithm for global optimization problems. However, the combination of mutation strategies and parameter settings of DE is problem dependent and choosing the suitable one is a challenge work and timeconsuming. In addition, the deficiency in local exploitation also has a significant influence on the performance of *** order to solve these problems, a DE variant with Commensal learning and uniform local search(CUDE) has been proposed in this paper. In CUDE, commensal learning is proposed to adaptively select optimal mutation strategy and parameter setting simultaneously under the same criteria. Moreover, uniform local search enhances exploitation ability. Comprehensive experiment results on all the CEC2013 test suite and comparison with the state-of-the-art DE variants indicate that the CUDE is very competitive.

关键词： Differential evolution Commensal learn ing Uniform local search Global optimization

Thermal performances of non-equidistant helical-coil phase change accumulator for latent heat storage

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Science China(Technological Sciences) 2017年第5期60卷 668-677页

作者： ZHANG GaoWei hu peng LIU MingHou Department of Thermal Science and Energy Engineering University of Science and Technology of China Hefei 230027 China

Helical-coil is a common structure of heat exchanger unit in phase change heat accumulator and usually has the equal coil pitch between adjacent coils. Its thermal performances could be improved by improving the uniformity of the phase change material （PCM） temperature distribution. Thus, a novel non-equidistant helical-coil structure was proposed in this study. Its coil pitch decreased along the flow direction of heat transfer fluid, which made the heat exchange area in unit volume increase to match the decreasing temperature difference between the heat transfer fluid and PCM. The structure was optimized using numerical simulation. An experimental system was developed and the experiment results indicated that the proposed non-equidistant helical-coil heat accumulator was more effective than equidistant helical-coil for latent heat storage. The uniformity of the temperaalre distribution was also confirmed by simulation results.

关键词： heat storage helical-coil heat accumulator phase change uniform temperature distribution

Efficacy and Safety of Glecaprevir/Pibrentasvir in Patients with Chronic HCV Infection

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Journal of Clinical and Translational Hepatology 2021年第1期9卷 125-132页

作者： Xiaoqing Liu peng hu Department of Infectious Diseases Institute for Viral HepatitisThe Key Laboratory of Molecular Biology for Infectious Dis-easesChinese Ministry of EducationThe Second Affiliated Hospital of Chongqing Medical UniversityChongqingChina

Hepatitis C virus(HCV)infection is a major cause of end-stage liver disease,including decompensated cirrhosis and hepatocellular *** 95%of patients with HCV infection have achieved sustained virologic response at 12 weeks under the treatment of several pan-genotypic regimens approved for patients with HCV *** glecaprevir/pibrentasvir(G/P)regimen has some features that distinguish it from others and is the only 8-week regimen approved for treatment-naive patients and patients experienced in regimens containing(peg)interferon,ribavirin,and/or sofosbuvir,without an HCV NS3/4A protease inhibitor or NS5A inhibitor(except those with genotype 3).This review aims to summarize the efficacy and safety of G/P in HCV-infected patients from clinic trials and real-world studies,including those who have historically been considered difficult to cure.

关键词： Hepatitis C Mavyret Glecaprevir Pibrentasvir Treatment outcome

Numerical modeling of the propagation and morphological changes of turbidity currents using a cost-saving strategy of solution updating

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International Journal of Sediment Research 2020年第6期35卷 587-599页

作者： peng hu Yue Li Ocean College Zhejiang University

Existing layer-averaged numerical models for turbidity currents have mostly adopted the global minimum time step(GMiTS) for solut:ion updating,which confines their computational efficiency and limits their attractiveness for field *** paper presents a highly efficient layer-averaged numerical model for turbidity currents by implementing the combined approach of the local graded-time-step(LGTS) and the global maximum-time-step(GMaTS).The governing equations are solved for unstructured triangular meshes by the shock-capturing finite volume method along with a set of well-balanced evaluations of the numerical flux and geometrical slope source *** quantitative accuracy of the model,given reasonably estimated empirical and model parameters(e.g.,bed friction,water entrainment,sediment deposition and erosion coefficients),is demonstrated by comparing the numerical solutions against laboratory data of the current front positions and deposition profiles,as well as field data of the current front *** improved computational efficiency is demonstrated by comparing the computational cost of the present model against that of a traditional model that uses a *** the present simulated cases,the maximum reduction of the computational cost is approximately 80%(e.g.,a simulation that cost 1 h before will only require 12 min with the new model).

关键词： Turbidity currents Numerical modeling Computational efficiency Time step

Mechanism and Improvement of Straight Edge Seam Defect on Hot-rolled Plate Surfaces through Use of Chamfered Slabs

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Journal of Iron and Steel Research International 2016年第6期23卷 539-546页

作者： hui ZHANG peng hu Ming-lin WANG National Engineering and Research Center for Continuous Casting Technology Central Iron and Steel Research Institute School of Metallurgy Northeastern University

To improve the straight edge seam defect on hot-rolled steel plates,the deformation and temperature distribution of rectangular slabs and chamfered slabs during rolling in a pilot rolling experiment were analyzed in detail using the finite element *** results showed that the crease formed on the lateral side near the edge of the plate as a result of uneven stress during broadside *** creases rose to the surface with unrestricted spread and evolved into a straight edge seam during the subsequent straight *** eliminate the straight edge seam defect,chamfered slabs were developed and investigated for *** use of the chamfered slabs provided two advantages for rolling：the distribution of the temperature near the edge was ameliorated,and the deformation shape was improved by the chamfered *** a result,the risk of forming a straight edge seam defect was reduced by the use of a chamfered slab.

关键词： straight rolled rolling eliminate subsequent corner rectangular defects crease tensile

Nitrogen incorporated nickel molybdenum sulfide as efficient electrocatalyst for overall water splitting

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Journal of Materials Science & Technology 2022年第4期99卷 270-276页

作者： Kena Wu Xiaonan Wei Deng Li peng hu Beijing Bioprocess Key Laboratory State Key Laboratory of Chemical Resource EngineeringBeijing University of Chemical TechnologyBeijing 100029China Amoy-BUCT Industrial Bio-technovation Institute Amoy 361022China Key Laboratory of Advanced Functional Materials Education Ministry of ChinaFaculty of Materials and ManufacturingBeijing University of TechnologyBeijing 100124China

Developing bifunctional electrocatalysts with improved efficiency and stability in overall water splitting is of extreme importance for renewable energy *** this work,an in situ N doping strategy was demonstrate to boost the efficiency and stability of nickel molybdenum sulfide both in electrocatalytic hydrogen evolution reaction and oxygen evolution *** and theoretical results indicate that such modification offers enriched active sites for electrochemical reaction,and further increases the kinetic driven force of water *** a result,the N–NiMoS electrode exhibits a remarkably improved performance with rather low potential of 1.54 V to offer a current density of 10 mA cm;for overall water splitting,which is 130 mV decrease than that of pristine *** addition,impressive electrochemical stability also reveals a 76.6%preservation of initial current density after 100 h test,which is superior than that of pristine one after 25 h ***,the potential to enhance the performance of electrocatalysts by as-proposed route promises a valuable way to develop efficient catalysts with enhanced property for electrochemical applications.

关键词： Bifunctional electrocatalyst Water splitting Nitrogen incorporation Nickel molybdenum sulfide

Higher-order electroelastic modelling of piezoelectric cylindrical nanoshell on elastic matrix

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Defence Technology（防务技术） 2022年第5期18卷 781-796页

作者： Xiao-ping huang peng-fei hu Mohammad Arefi College of Mechanical and Electrical Engineering Nanning UniversityNanning530000GuangxiChina School of Materials Science and Engineering Luoyang Institute of TechnologyLuoyang471023HenanChina Department of Solid Mechanics Faculty of Mechanical EngineeringUniversity of KashanKashan87317-51167Iran

This paper develops electro-elastic relations of functionally graded cylindrical nanoshell integrated with intelligent layers subjected to multi-physics loads resting on elastic *** piezoelectric layers are actuated with external applied *** nanocore is assumed in-homogeneous in which the material properties are changed continuously and gradually along radial ***-order shear deformation theory is used for the description of kinematic relations and electric potential distribution is assumed as combination of a linear function along thickness direction to show applied voltage and a longitudinal ***-elastic size-dependent constitutive relations are developed based on nonlocal elasticity theory and generalized Hooke’s *** principle of virtual work is used to derive governing equations in terms of four functions along the axial and the radial directions and longitudinal electric potential *** numerical results including radial and longitudinal displacements are presented in terms of basic input parameters of the integrated cylindrical nanoshell such as initial electric potential,small scale parameter,length to radius ratio and two parameters of *** is concluded that both displacements are increased with an increase in small-scale parameter and a decrease in applied electric potential.

关键词： Higher-order shear deformation theory Electro-elastic bending Functionally graded materials Size-dependent analysis Nonlocal parameter Cylindrical nano shell

Study of ATP borate ester effects on cell sensitization to radiation emitted by a nuclear reactor

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Nuclear Science and Techniques 2020年第1期31卷 13-25页

作者： Miao Wang Yong-peng Tong Qi Luo Shi-peng hu College of Physics and Optoelectronic Engineering Shenzhen University

Adenosine triphosphate(ATP)borate ester as a new boron agent for boron neutron capture therapy was *** was synthesized via a dehydration reaction induced by heating adenosine triphosphate disodium with boric ***,ATP borate ester pretreatments were assessed to study their effects on cell sensitization from exposure to thermal neutron irradiation emitted by a nuclear *** cell viability assays(CCK8),survival rates of A549 cells pretreated with or without boroncontaining agents,including ATP borate ester and 4-dihydroxyborylphenylalanine(BPA),were *** week after feeding an ATP borate ester solution to tumorbearing nude mice,elemental B content values of tumor muscle and blood were measured using inductively coupled plasma mass spectrometry(ICP-MS).Meanwhile,other tumor tissue samples were placed in a culture medium,subjected to a 3-min neutron irradiation exposure,and then fixed in formalin 24 h later for the terminaldeoxynucleotidyl transferase(TDT)-mediated d UTP nick end labeling(TUNEL)immunohistochemical staining *** showed that A549 cell irradiation sensitization(irradiation dose of 0.33 Gy)varied with *** values of the ATP borate ester pretreatment group were 1.3–14.1 with boron agent concentrations of 0.3–4.5 *** 1.1–3.4 mM,ATP borate ester showed significantly higher sensitization values than ***,TUNEL results demonstrated that apoptosis rates of tumor tissue cells exposed to irradiation after ATP borate ester pretreatment significantly exceeded the corresponding rates for BPA-pretreated *** animal experiments,although the distribution ratio of ATP borate ester(tumor tissue/normal muscle,T/N)of 1.2 was not significantly different compared with that of BPA(1.3),the total ATP borate ester concentration in the tumor tissue(0.79±0.05μg/g)significantly exceeded that of BPA(0.58±0.05μg/g).Thus,compared with BPA,the greater enrichment of ATP borate ester in tumor tissues permits pre

关键词： ATP borate ester Boron agent Neutron radiation Sensitizing effect A549 cell lines