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Searchlight trapping reveals seasonal cross-ocean migration of fall armyworm over the South China Sea

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Journal of Integrative Agriculture 2021年第3期20卷 673-684页

作者： ZHOU Xian-yong WU Qiu-lin jia hui-ru WU Kong-ming College of Plant Protection Southwest UniversityChongqing 400716P.R.China State Key Laboratory for Biology of Plant Diseases and Insect Pests Institute of Plant ProtectionChinese

The fall armyworm(FAW),Spodoptera frugiperda,is a migratory noctuid pest that has recently invaded eastern *** 2017 up till 2020,searchlight trapping was used to assess the extent of FAW migration across the South China *** and morphology-based identification confirmed that FAW made its first appearance on Yongxing Island on 11 April 2019,with most trapped individuals belonging to the ***"corn-strain".Carbon isotope analysis further showed that FAW moths originated from C4 host plants,while trajectory analyses revealed that migratory *** adults are able to cross the South China Sea and enter China's *** long-distance migration process plausibly results in frequent genetic mixing between domestic FAW populations and those of neighboring Southeast Asian ***,this work provides unique insights into FAW migration across eastern Asia and ultimately can help advance pest forecasting,risk assessment and area-wide pest management.

关键词： Spodoptera frugiperda host strain isotope trajectory analysis cross-ocean migration invasion biology

Electromagnetic properties of neutron-rich Ge isotopes

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Chinese Physics C 2019年第12期43卷 159-168页

作者： hui jiang Xin-lin Tang jia-Jie Shen Yang Lei School of Arts and Sciences Shanghai Maritime UniversityShanghai 201306China School of National Defense Science and Technology Southwest University of Science and TechnologyMianyang 621010China

The electric quadrupole moment Q and the magnetic momentp(or the g factor)of low-lying states in even-even nuclei 72-80Ge and odd-mass nuclei 75-79 Ge are studied in the framework of the nucleon pair approximation(NPA)of the shell model,assuming the monopole and quadrupole pairing plus quadrupole-quadrupole *** *** calculations reproduce well the experimental values of Q(21^+)and g(21^+)for 72,74,76 Ge,as well as the yrast energy levels of these *** structure of the 21^+states and the contributions of the proton and neutron components in Q(21^+)and g(21^+)are discussed in the SD-pair truncated shell-model *** overall trend of Q(21^+)and g(21^+)as a function of the mass number A,as well as their signs,are found to originate essentially from the proton *** negative value of Q(21^+)in 72,74Ge is suggested to be due to the enhanced quadrupole-quadrupole correlation and configuration mixing.

关键词： electromagnetic moments shell model 59≤A≤89

Octopaminergic neurons function in appetitive but not aversive olfactory learning and memory in Bactrocera dorsalis

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Insect Science 2022年第6期29卷 1747-1760页

作者： Jin-Xin Yu Qian Xiang jia-Bao Qu Yan-Min hui Tao lin Xin-Nian Zeng jia-Li Liu Guangdong Engineering Research Center for Insect Behavior Regulation College of Plant ProtectionSouth China Agricultural UniversityGuangzhouGuangdongChina College of Life Sciences Department of Biological ScienceShangrao Normal UniversityShangraoJiangxiChina

The biogenic amine octopamine(OA,invertebrate counterpart of nora-drenaline)plays critical roles in the regulation of olfactory ***,OA has been thought to mediate appetitive but not aversive learning in honeybees,fruit flies(Drosophila),and ***,this viewpoint has recently been challenged because OA activity through aβ-adrenergic-like receptor drives both appetitive and aversive ***,we explored the roles of OA neurons in olfactory learning and memory retrieval in Bactrocera *** trained flies to associate an orange odor with a sucrose reward or to associate methyl eugenol,a male lure,with N,N-diethyl-3-methyl benzoyl amide(DEET)*** then treated flies with OA receptor antagonists before appetitive or aversive conditioning and a memory retention *** of OA receptor antagonist mianserin or epinastine into the abdomen of flies led to impaired of appetitive learning and memory retention with a sucrose reward,while aversive learning and memory reten-tion with DEET punishment remained *** results suggest that the OA signaling participates in appetitive but not aversive learning and memory retrieval in *** through OA receptors.

关键词： appetitive aversive Bactrocera dorsalis learning and memory octopamine

Loading of tacrolimus containing lipid based drug delivery systems into mesoporous silica for extended release

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Asian Journal of Pharmaceutical Sciences 2016年第6期11卷 751-759页

作者： Li Liu jia Li Mei-hui Zhao hui Xu lin-sen Li Shao-ning Wang School of Pharmacy Shenyang Pharmaceutical UniversityShenyang 110016China Department of Biochemistry Shenyang Medical CollegeShenyang 110034China School of Pharmaceutical Engineering Shenyang Pharmaceutical UniversityShenyang 110016China

Many studies had been focused on designing tacrolimus sustained release preparations based on solid dispersion technique, but no one had tried to employ mesoporous silica as the carrier material to realize this goal. The purpose of this study was to develop a novel, simple and environmental friendly drug loading method with mesoporous silica to obtain tacrolimus sustained-release preparation. Tacrolimus was firstly dissolved in the molten mixed lipid composed of Compritol 888 ATO and Gelucire 50/13 to prepare a drug loaded lipid-based drug delivery systems(LBDDS), then the liquid LBDDS was adsorbed by mesoporous silica to transfer the liquid into solid powder, ie. the tacrolimus sustained release silica-lipid hybrid(SLH). The SLH was characterized by SEM, CLSM, XRPD and DSC, and the in vitro drug release was tested using a paddle method. SEM and CLSM observation showed that the LBDDS was efficiently distributed throughout the pores of the silica. The results of DSC and XRPD illustrated that the lipid existed inside the silica at amorphous state. The drug-loaded SLH showed good flowability, compressibility, compactibilty and two-phase in vitro drug release process within 24 hours, which did not change obviously even after storage at 40 °C for 10 *** present study provided a novel and simple method to prepare tacrolimus sustained release powder, which provided a feasible solution to solidify the liquid LBDDS of not only extended drug release behavior, but also improved stability and micromeritic properties.

关键词： Tacrolimus Lipid-based drug delivery system Mesoporous silica Silica-lipid hybrid Sustained-release

Searching for exoplanets by HEPS II. detecting earth-like planets in habitable zone around planet hosts within 30 pc

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Research in Astronomy and Astrophysics 2020年第3期20卷 108-121页

作者： Zhou-Yi Yu hui-Gen Liu Ji-lin Zhou En-Si Liang Ming Yang hui Zhang jia-Cheng Liu School of Astronomy and Space Science Key Laboratory of Modern Astronomy and Astrophysics in Ministry of EducationNanjing UniversityNanjing 210093China

HEPS(Habitable ExoPlanet Survey) is a planning astrometry satellite that aims to find Earth-like planets in the solar neighbourhood. In this paper, we selected 140 planet harboring stars within 30 pc of the solar system to be potential targets for HEPS. We calculate the detection probability of the planet in habitable zone(HZ) for each system using the simulated data of astrometry measurements. For those host stars without planets in HZ, we inject an additional planet of 10 M⊕ in their HZs and check the stability of the systems. Considering five observation modes of different sampling cadence and total observation time, we obtain a table containing the total detection probability of the planets in HZs for all of the 140 selected systems. This paper provides a potential ranked list of target stars for HEPS, or other astrometric mission to detect Earth-like planets in the future. We also calculate an empirical fitted expression of the detection probability as a function of both sampling cadence and total observation time. We conclude a quantitative method to estimate the detection probability for certain planet hosts and observation modes via the empirical expression. We show the minimum requirements of both sampling cadence and observation time for Proxima Centauri, HD 189733 and HD 102365, if the detection probability of habitable-zone planets of these three systems needs to be 90%.

关键词： astrometry-stars planetary systems-planets and satellites detection-methods numerical

Element-Free Modelling of Topological Gels with Peculiar Multiaxial Large Deformation Behavior

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Acta Mechanica Solida Sinica 2022年第5期35卷 880-890页

作者： D.M.Li jia-hui Liu jia-Xuan Xie School of Civil Engineering and Architecture Wuhan University of TechnologyWuhan430070China School of Science Wuhan University of TechnologyWuhan430070China

With slidable cross-links along the polymer strands,topological gels can adjust their network topology in response to the imposed *** reported in experimental studies from the literature,the unique cross-linking strategy and the distinct deformation mechanism result in a peculiar multiaxial behavior with minimal strain-coupling between different principal directions at relatively low cross-linking *** paper presents an element-free modelling of the topological gels focusing on their nonlinear stress–strain behavior under general biaxial ***,conditions of uniaxial stretching and the three types of biaxial deformation,i.e.,equibiaxial stretching,pure shear deformation,and“two-step”biaxial deformation are *** numerical stress–strain curves for these conditions are compared against those from the literature.

关键词： Topological gel Multiaxial deformation Large deformation Element-free method Hyperelasticity

An electrochemical machining method for aeroengine blades based on four-directional synchronous feeding of cathode tools

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Chinese Journal of Aeronautics 2023年第9期36卷 380-391页

作者： jia LIU Libing hui Dongqian jia Yan LIU Di ZHU College of Mechanical and Electrical Engineering Nanjing University of Aeronautics and AstronauticsNanjing 210016China

Blades are critical components of modern *** the many characteristic structures of the blade,the leading/trailing edges are key structures that have the greatest influence on the aerodynamic effect and power conversion of the *** machining(ECM)is regarded as one of the most important techniques in blade manufacturing due to its process characteristics of high material removal rates,virtually no tool wear,and no areas of thermal or mechanical damage to the workpiece rim ***,an ECM method based on the fourdirectional synchronous feeding of four cathode tools is proposed to improve the machining accuracy of the leading and trailing edges of the *** blade ECM using this method,four cathode tools feed toward the basin/back surfaces and leading/trailing edges *** dynamic processing simulation and flow field simulation results of the ECM process show that the proposed method eliminates the sharp changes in the electric field and electrolyte flow field at the leading and trailing edges seen in traditional machining ***,the electric field and flow field stability of the leading and trailing edges at the final stage of machining is greatly *** comparison of the conventional and proposed ECM methods showed that four-directional synchronous feeding results in improved profile accuracy over repeated machining processes and good surface quality.

关键词： Aero-engine Blade Dynamic simulation Electrochemical machining Experiment

Analysis of current induced by long internal solitary waves in stratified ocean

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Acta Mechanica Sinica 2010年第5期26卷 653-660页

作者： hui-Qin Zhang jia-Chun Li Laboratory of Environmental Mechanics Institute of Mechanics Chinese Academy of SciencesBeijing 100190 China

An approximate theoretical expression for the current induced by long internal solitary waves is presented when the ocean is continuously or two-layer stratified. Particular attention is paid to characterizing velocity fields in terms of magnitude, flow components, and their temporal evolution/spatial distribution. For the two-layer case, the effects of the upper/lower layer depths and the relative layer density difference upon the induced current are further studied. The results show that the horizontal components are basically uniform in each layer with a shear at the interface. In contrast, the vertical counterparts vary monotonically in the direction of the water depth in each layer while they change sign across the interface or when the wave peak passes through. In addition, though the vertical components are generally one order of magnitude smaller than the horizontal ones, they can never be neglected in predicting the heave response of floating platforms in gravitationally neutral balance. Comparisons are made between the partial theoretical results and the observational field data. Future research directions regarding the internal wave induced flow field are also indicated.

关键词： Induced current Internal solitary waves Stratified flow Two-layer fluid Asymptotic analysis

CASCADIC MULTIGRID METHOD FOR THE MORTAR ELEMENT METHOD FOR P1 NONCONFORMING ELEMENT

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Journal of Computational Mathematics 2005年第4期23卷 425-440页

作者： Chun-jia Bi Dan-hui Hong Department of Mathematics Yantai University Shandong 264005 China Institute of Mathematics Fudan University Shanghai 200433 China

In this paper, we consider the cascadic multigrid method for the mortar P1 nonconforming element which is used to solve the Poisson equation and prove that the cascadic conjugate gradient method is accurate with optim... 详细信息

关键词： Mortar P1 nonconforming element Cascadic multigrid method