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Insect Science 2021年第3期28卷 639-648页

作者： Sheng-Lan Lv Yang Shi Jia-cheng zhang pei Liang Lei zhang Xi-Wu Gao College of Plant Protection China Agricultural UniversityBeijingChina

Spodoptera frugiperda(Lepidoptera:Noctuidae)is a widely distributed pest of *** it invaded China in 2018,it has caused serious damage to local corn ***,an anthranilic diamide insecticide,has been widely used to control lepidopteran *** is a new allosteric modulator insecticide devel-oped based on chlorantraniliprole,so it has a similar mechanism and insecticidal *** this study,we investigated resistance levels to chlorantraniliprole and tetrachloropyramid in *** from 13 populations in *** the populations tested,the relative highest resistance to chlorantraniliprole occurred in the Guangzhou population,and the most susceptible to chlorantraniliprole was found in the Wuhan *** lethal dosage LD50 value of the Guangzhou population against chlorantraniliprole was 27.8-fold higher than that of the Wuhan *** differences were observed among 5".frugiperda populations in terms of sensitivity to *** mutations at the 14734 site of the ryanodine receptor(RyR)were found,while no mutations were found in the G4891 *** mutations were detected in only two of the 786 individuals analyzed one from the Qinzhou population and other from the Anshun population(frequency below 2%in both cases).There were no significant differences in the expression levels of RyR between Guangzhou and Wuhan *** summary,our results indicate that:(i)*** has low resistance levels to diamide insecticides in China;and(ii)the differences in relative resistance among the 13 populations analyzed are not caused by the mutations in RyR or the expression of RyR.

关键词： diamide insecticides resistance resistance risk Spodoptera frugiperda

Delay-dependent exponential stability of impulsive stochastic systems with time-varying delay

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Journal of Systems Engineering and Electronics 2011年第5期22卷 799-809页

作者： pei cheng Feiqi Deng Yunjian Peng Systems Engineering Institute South China University of Technology Guangzhou 510640 P. R. China School of Mathematical Science Anhui University Hefei 230039 P. R. China

The problem of delay-dependent exponential stability is investigated for impulsive stochastic systems with time-varying delay. Although the exponential stability of impulsive stochastic delay systems has been discussed by several authors, few works have been done on delay-dependent exponential stability of impulsive stochastic delay systems. Firstly, the Lyapunov-Krasovskii functional method combing the free-weighting matrix approach is applied to investigate this problem. Some delay-dependent mean square exponential stability criteria are derived in terms of linear matrix inequalities. In particular, the estimate of the exponential convergence rate is also provided, which depends on system parameters and impulsive effects. The obtained results show that the system will stable if the impulses＇ frequency and amplitude are suitably related to the increase or decrease of the continuous flows, and impulses may be used as controllers to stabilize the underlying stochastic system. Numerical examples are given to show the effectiveness of the results.

关键词： impulsive stochastic systems time-varying delay exponential stability linear matrix inequality (LMI).

Synthesis and Characterization of Microcapsules with Chlorpyrifos Cores and Polyurea Walls

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Chemical Research in Chinese Universities 2006年第3期22卷 379-382页

作者： zhang Qiang zhang pei-pei JIAO Qing-ze College of Science Beijing Institute of Technology Beijing 100081 P. R. China College of Chemistry and Environmental Science Beijing Institute of Technology Beijing 100081 P. R. China

Microcapsules with chlorpyrifos cores and polyurea walls were synthesized with 2,4-tolylene diisocyanate as an oil-soluble monomer and ethylenediamine as a water-soluble monomer via an interracial polycondensation reaction. The products were characterized by means of Fourier transform infrared spectrometry, ^13C NMR spectrometry and ^31p NMR spectrometry. The morphology, the particle size and the particle size distribution, and the thermal properties were also evaluated. The prepared microcapsules exhibit clear and smooth surfaces and have a mean diameter of 28. 13 μm. These microcapsules also have a good thermal stability for long-term use, and have potential applications in minimizing the toxicity of chlorpyrifos through controlled release.

关键词： Microcapsule Chlorpyrifos Polyurea Synthesis Characterization

A cellulose-based lithium-ion battery separator with regulated ionic transport and high thermal stability for extreme environments

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Nano Research 2025年第1期18卷 315-322页

作者： Kun-Peng Yang Song Xie Zi-Meng Han Hao-cheng Liu Chong-Han Yin Wen-Bin Sun zhang-Chi Ling Huai-Bin Yang De-Han Li Qing-Fang Guan Shu-Hong Yu Department of Chemistry New Cornerstone Science LaboratoryInstitute of Biomimetic Materials&ChemistryAnhui Engineering Laboratory of Biomimetic MaterialsDivision of Nanomaterials&ChemistryHefei National Research Center for Physical Sciences at the MicroscaleUniversity of Science and Technology of ChinaHefei 230026China Institute of Innovative Materials Department of Materials Science and EngineeringDepartment of ChemistrySouthern University of Science and TechnologyShenzhen 518055China

Separators play a critical role in lithium-ion ***,the restrictions of thermal stability and inferior electrical performance in commercial polyolefin separators significantly limit their applications under harsh ***,we report a cellulose-assisted self-assembly strategy to construct a cellulose-based separator massively and *** an ultrahigh ionic conductivity in electrolytes of 3.7 mS·cm^(-1) and the ability to regulate ion transport,the obtained separator is a promising alternative for high-performance lithium-ion *** addition,integrated with high thermal stability,the cellulose-based separator endows batteries with high safety at high temperatures,greatly expanding the application scenarios of energy storage devices in extreme environments.

关键词： lithium-ion batteries bio-inspired materials battery separators cellulose nanofiber ultrahigh ionic conductivity high safety

Simultaneous Localization and Mapping Technology Based on Project Tango

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Wuhan University Journal of Natural Sciences 2019年第2期24卷 176-184页

作者： XU pei SU Kehua HONG cheng zhang Dengyi School of Computer Wuhan University

Aiming at the problem of system error and noise in simultaneous localization and mapping(SLAM) technology, we propose a calibration model based on Project Tango device and a loop closure detection algorithm based on visual vocabulary with memory management. The graph optimization is also combined to achieve a running application. First, the color image and depth information of the environment are collected to establish the calibration model of system error and noise. Second, with constraint condition provided by loop closure detection algorithm, speed up robust feature is calculated and matched. Finally, the motion pose model is solved, and the optimal scene model is determined by graph optimization method. This method is compared with Open Constructor for reconstruction on several experimental scenarios. The results show the number of model's points and faces are larger than Open Constructor's, and the scanning time is less than Open Constructor's. The experimental results show the feasibility and efficiency of the proposed algorithm.

关键词： simultaneous localization and mapping Project Tango loop closure detection visual vocabulary graph optimization

Development of Glass Ceramics Made From Ferrous Tailings and Slag in China

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Journal of Iron and Steel Research International 2007年第2期14卷 73-78页

作者： LIU cheng-jun SHI pei-yang zhang Da-yong JIANG Mao-fa School of Materials and Metallurgy Northeastern University Shenyang 110004 Liaoning China

A great amount of ferrous tailings and slag cause severe damage to the ecological environment, which must be reclaimed and utilized. The composition, type, and characteristics of ferrous tailings and slag in China were introduced. The research status and the application outlook of glass ceramics made from ferrous tailings and slag were discussed. Glass ceramics made from ferrous tailings and slag can be applied to various fields, and it will be environmentally conscious materials in the 21st century.

关键词： glass ceramics ferrous tailings slag

Metal/nanocarbon layer current collectors enhanced energy efficiency in lithium-sulfur batteries

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Science Bulletin 2017年第18期62卷 1267-1274页

作者： Jia-Qi Huang pei-Yan Zhai Hong-Jie Peng Wan-cheng Zhu Qiang zhang Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology Department of Chemical Engineering Tsinghua University Advanced Research Institute of Multidisciplinary Science Beijing Institute of Technology Department of Chemical Engineering Qufu Normal University

Lithium-sulfur （Li-S） batteries with intrinsic merits in high theoretical energy density are the most promising candidate as the next-generation power sources. The strategy to achieve a high utilization of active materials with high energy efficiency is strongly requested for practical applications with less energy loss during repeated cycling. In this contribution, a metal/nanocarbon layer current collector is proposed to enhance the redox reactions of polysulfides in a working Li-S cell. Such a concept is demon- strated by coating graphene-carbon nanotube hybrids （GNHs） on routine aluminum （AI） foil current collectors. The interracial conductivity and adhesion between the current collector and active material are significantly enhanced. Such novel cell configuration with metal/nanocarbon layer current collectors affords abundant Li ions for rapid redox reactions with small overpotential. Consequently, the Li-S cells with nanostructured current collectors exhibit an initial discharge capacity of 1,113 mAh g-1 at 0.5 C, which is -300 mAh g-1 higher than those without a GNH coating layer. The capacity retention is 73% for cells with GNH after 300 cycles. A reduced voltage hysteresis and a high energy efficiency of ca. 90% are therefore achieved. Moreover, the AI/GNH layer current collectors are easily implanted into current cell assembly process for energy storage devices based on complex multi-electron redox reactions （e.g., Li-S batteries, Li-O2 batteries, fuel cells, and flow batteries）.

关键词： Lithium-sulfur battery Nanostructured current collectors Polysulfides Energy efficiency Pouch cell

Synthesis and Crystal Structure of [Cd(NBA)(μ_3-OH)(4,4′-bipy)_(1/2)]_n

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Chinese Journal of Structural Chemistry 2007年第8期26卷 917-919页

作者： SHEN Yi-cheng zhang Jian LI Zhao-Ji zhang Lei YIN pei-Xiu YAO Yuan-Gen State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter The Chinese Academy of Sciences Fuzhou Fujian 350002 China

A new cadmium polymer [Cd（NBA）（μ3-OH）（4,4＇-bipy）1/2]n 1 （NBA=m-nitrobenzoic acid and 4,4＇-bipy=4,4-bipyridine） has been synthesized by hydrothermal reaction. Its structure was determined by single-crystal X-ray diffraction method, and characterized by elemental analysis and IR spectrum. The crystal is of monoclinic, space group C2/c, with a=15.6912（9）, b=25.9394（15）, c=6.7332（4）A, β=114.7700（10）°, V=2488.4（3）A^3, C12H9CdN2O5, Mr=373.61, Z=8, Dc=1.995 g/cm^3,μ=1.776 mm^-1, F（000）=1464, R=0.0411 and wR=0.1128 for 2130 observed reflections （I 〉 2σ（I））.X-ray diffraction studies reveal that the compound features a layered structure, in which 4,4＇-bipy ligands bridge Z type of double chains [Cd（μ3-OH）]n and NBA ligands locate at the two sides of the layer. The π-π interactions between the benzene rings of NBA ligands of two adjacent layers lead to the 3D framework.

关键词： cadmium polymer 4 4'-bipyridine m-nitrobenzoic acid crystal structure

1-GENERATOR QUASI-CYCLIC CODES

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Journal of Systems Science & Complexity 2007年第4期20卷 554-561页

作者： Junying pei Xuejun zhang Department of Mathematics Soochow University Suzhou 215006. China

This paper discusses the enumeration of 1-generator quasi-cyclic codes and describes an algorithm which will obtain one, and only one, generator for each 1-generator quasi-cyclic code.

关键词： Direct sum decomposition idempotent quasi-cyclic code.

Positive Q-Value Neutron Transfer Mediated Sub-Barrier Fusion Reactions

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Chinese Physics Letters 2017年第4期34卷 22-25页

作者： pei-Wei Wen Zhao-Qing Feng Fan zhang cheng Li cheng-aian Li Feng-Shou zhang Key Laboratory of Beam Technology and Material Modification of Ministry of Education College of Nuclear Science and TechnologyBeijing Normal UniversityBeijing 100875 Beijing Radiation Center Beijing 100875 Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000 China Institute of Atomic Energy Beijing 102413 Center of Theoretical Nuclear Physics National Laboratory of Heavy Ion Accelerator of LanzhouLanzhou 730000

Positive Q-value neutron transfer mediated sub-barrier fusion reactions are studied with an empirical coupled channels model, which takes into account neutron rearrangement related only to the dynamical matching condition with no free parameters. Fusion cross sections of collision systems ^32S＋^90,94,96Zr are calculated and analyzed. Logarithmic residual enhancement （LRE） is proposed to evaluate the discrepancy between calculated results and experimental data. The experimental data can be described well with this model for the first time as a whole, while the LRE analysis shows that there are still theoretical systematic deviations.

关键词： LRE MRE exp Positive Q-Value Neutron Transfer Mediated Sub-Barrier Fusion Reactions Zr