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Slow-growth high-mortality： A meta-analysis for insects

Insect Science 2018年第2期25卷 337-351页

作者： ke-Wei chen Yigen chen College of Agriculture South China Agricultural University Guangzhou China Department of Entomology and Nematology University of California One Shields Avenue Davis California US

The slow growth-high mortality hypothesis （SG-HG） predicts that slower growing herbivores suffer greater mortality due to a prolonged window of vulnerability. Given diverse plant-herbivore-natural enemy systems resulting from different feeding ecologies of herbivores and natural enemies, this hypothesis might not always be applicable to all systems. This is evidenced by mixed support from empirical data. In this study, a meta- analysis of the SG-HM hypothesis for insects was conducted, aiming to find conditions that favor or reject SG-HM. The analysis revealed significant within- and between-group heterogeneity for almost a11 explanatory variables and overall did not support SG-HM. In this analysis, SG-HM was supported when any of the following 5 conditions was met：（1） host food consisted of artificial diet; （2） herbivore growth was measured as larval mass; （3） herbivores were generalists; （4） no or multiple species of natural enemies were involved in the study; and （5） parasitoids （i.e., parasitic insects） involved in the study were gregarious. SG-HM was rejected when any of the following 5 conditions was met：（1） herbivores were from the order Hymentoptera; （2） parasitoids from more than 1 order caused herbivore mortality; （2） parasitoids were specialists; （3） parasitoids were solitary; （4） parasitoids were idiobionts or koinobionts; and （5） single species of natural enemy caused mortality of specialist herbivores. All known studies investigated herbivore mortality for a short period of their life cycle. Researchers are encouraged to monitor herbivore mortality during the entire window of susceptibility or life cycle using life tables. Studies involving multiple mortality factors （i.e., both biotic and abiotic） or multiple natural enemy species are also encouraged since herbivores in nature face a multitude of risks during the entire life cycle. More comprehensive studies may increase our understanding of factors influencing the relationships between herbivore gr

关键词： feeding ecology natural enemy parasitoid predator tritrophic interactions

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A matrix grammar approach for automatic distributed network resource management

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Frontiers of Computer Science 2013年第4期7卷 583-594页

作者： Weidong MIN ke chen Yongzhenke School of Computer Science and Software Engineering Tianjin Polytechnic University Tianjin 300387 China

Network resource management is critical to ensure the security and optimal performance of distributed networks and information systems. Existing technologies are not capable of managing large-scale network resources because of a lack of reusability and scalability. This paper presents a matrix grammar approach for automatic distributed network resource management to alleviate these problems. A matrix grammar is proposed using WMI, CIM, and SNMP to manage network resources, and provides a generic mechanism to describe what needs to be managed and how to manage it. A scalable distributed multi-agent architecture for automatic network resource management is proposed, at its core lies a management automation engine consisting of a matrix analyzer and a recipe processor. The proposed solution has been implemented in software and applied in industrial products that achieve good technical and industrial results. It has good extensibility, scalability, ment automation and software and enables network managereusability.

关键词： network management multi-agent matrixgrammar WMI CIM SNMP distributed networks

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Ethnic Chinese Medicine,Borderless Civilization--On the Identity of Humane and Scientific Nature of Chinese and Western Medicines

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Chinese Journal of Integrative Medicine 2017年第8期23卷 563-565页

作者： chen ke-ji Xiyuan Hospital China Academy of Chinese Medical SciencesBeijing 100091China

The identity of Eastern and Western cultures should include aspects such as its concepts of societal development and science and *** this is related to issues like history of the culture and regional cultural psycholo... 详细信息

关键词： Ethnic Chinese Medicine,Borderless Civilization On the Identity of Humane and Scientific Nature of Chinese and Western Medicines

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Evidence-Based Clinical Chinese Medicine: Novel Exploration through Global Vision

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Chinese Journal of Integrative Medicine 2019年第11期25卷 879-880页

作者： chen ke-ji Center of Cardiovascular Diseases Xiyuan Hospital Academy of Chinese Medical Sciences

In 2008, the Royal Melbourne Institute of Tech no logy (RMIT University, Australia) and the Guangdong Provincial Hospital of Chinese Medicine (GPHCM, China) initiated an inter national cooperati on network for evidence-based clinical Chinese medicine (CM). Based on the exciting successful collaboration, the establishment of China-Australia International Research Centre for Chinese Medicine (the Centre) supported by both institutions was approved by the government in 2013.

关键词： RMIT GPHCM Guangdong

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SR-AFU: super-resolution network using adaptive frequency component upsampling and multi-resolution features

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Frontiers of Computer Science 2023年第1期17卷 123-132页

作者： ke-Jia chen Mingyu WU Yibo ZHANG Zhiwei chen School of Computer Science Nanjing University of Posts and TelecommunicationsNanjing 210023China Jiangsu key Laboratory of Big Data Security&Intelligent Processing Nanjing University of Posts and TelecommunicationsNanjing 210023China College of Telecommunications and Information Engineering Nanjing University of Posts and TelecommunicationsNanjing 210003China

Image super-resolution (SR) is one of the classic computer vision tasks. This paper proposes a super-resolution network based on adaptive frequency component upsampling, named SR-AFU. The network is composed of multiple cascaded dilated convolution residual blocks (CDCRB) to extract multi-resolution features representing image semantics, and multiple multi-size convolutional upsampling blocks (MCUB) to adaptively upsample different frequency components using CDCRB features. The paper also defines a new loss function based on the discrete wavelet transform, making the reconstructed SR images closer to human perception. Experiments on the benchmark datasets show that SR-AFU has higher peak signal to noise ratio (PSNR), significantly faster training speed and more realistic visual effects compared with the existing methods.

关键词： super-resolution multi-resolution features adaptive frequency upsampling wavelet transformation

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Electrochemical codeposition of typical α+β phases Mg-Li alloys from the molten LiCl-KCl-MgCl_2 system

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Rare Metals 2010年第2期29卷 198-203页

作者： YE ke chen Ye ZHANG Milin key Laboratory of the Ministry of Education for Superlight Materials ＆ Surface Technology College of Materials Science and Chemical Engineering Harbin Engineering University Harbin 150001 China

Electrochemical codeposition of Mg-Li alloys on molybdenum electrodes was investigated in LiCl-KCl（50 wt.%：50 wt.%） melts containing different concentrations of MgCl2 at 973 *** voltammograms show that the underpotential deposition of lithium on pre-deposited magnesium leads to the formation of liquid Mg-Li *** deposition potentials of Mg（II） and Li（I） ions gradually near each other with MgCl2 concentration ***-Li alloys with typical α ＋ β phases could be obtained by potentiostatic electrolysis from LiCl-KCl melts containing 5 wt.% MgCl2 at -2.25 V ***/AgCl（cathodic current density 1.70 A·cm-2） for 2.5 h.α phase, α ＋ β phases, and β phase Mg-Li alloys with different lithium contents were obtained by potentiostatic electrolysis from LiCl-KCl melts with the different concentrations of *** samples were characterized by X-ray diffraction and scanning electron microscopy.

关键词： physical chemistry Mg-Li alloys electrochemical codeposition molten salt electrolysis

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Ligand Effects in Dinitrogen Hydrogenation of Binuclear Zirconium Complexes

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Chinese Journal of Structural Chemistry 2008年第2期27卷 238-244页

作者： LIU Cai-Ping WU ke-chen State key Laboratory of Structural Chemistry Fujian Institute of Research on theStructure of Matter The Chinese Academy of Sciences Fuzhou Fujian 350002 China Graduate School of the Chinese Academy of Sciences Beijing 100039 China

In this work, we report a theoretical exploration of the ground-state electronic structures and molecular vibrational properties of a series of binuclear zirconium complexes in the framework of density functional theory （DFT） employing the B3LYP hybrid functional. The calculated results reveal that the electronic structure of the complex [（η^5-C5Me5）2Zr]2（μ^2, η^2, η^2-N2） is unfavorable for hydrogenation due to the exclusion of side-on dinitrogen in the LUMO＋ 1 molecular orbital as compared with the reactant 1 [（η^5-C5Me4H）2Zr]2（μ2,η^2,η^2-N2）. Besides, the structural feature of the hypothetical intermediate 1′, [（η^5C5Me4H）2Zr]2（μ2,η^2, η^2-N2）-n2, clearly implies the possibility of further hydrogenation. In addition, the distinguishing of vibrational modes of experimental intermediate 2, [（η^5-C5Me4H）2ZrH]2（μ2,η^2,η^2-N2H2）, indicates that the asymmetric stretching of Zr-N and Zr-H leads to dissociation. Moreover, the vibrational intensity of Zr-H is stronger than that of Zr-N. Therefore, it can be predicted that excess hydrogen atmosphere is necessary to ensure the dissociation of Zr-N bonds.

关键词： density functional theory binuclear zirconium complexes electronic structure vibrational properties dinitrogen hydrogenation

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Dynamic model and performance analysis of landing buffer for bionic locust mechanism

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Acta Mechanica Sinica 2016年第3期32卷 551-565页

作者： Dian-Sheng chen Zi-Qiang Zhang ke-Wei chen Robotic Institute Beihang University

The landing buffer is an important problem in the research on bionic locust jumping robots, and the different modes of landing and buffering can affect the dynamic performance of the buffering process significantly. Based on an experimental observation, the different modes of landing and buffering are determined, which include the different numbers of landing legs and different motion modes of legs in the buffering process. Then a bionic locust mechanism is established, and the springs are used to replace the leg muscles to achieve a buffering effect. To reveal the dynamic performance in the buffering process of the bionic locust mechanism, a dynamic model is established with different modes of landing and buffering. In particular, to analyze the buffering process conveniently, an equivalent vibration dynamic model of the bionic locust mechanism is *** the support forces of the ground to the leg links, which can be obtained from the dynamic model, the spring forces of the legs and the impact resistance of each leg are the important parameters affecting buffering performance, and evaluation principles for buffering performance are proposed according to the aforementioned parameters. Based on the dynamic model and these evaluation principles, the buffering performances are analyzed and compared in different modes of landing and buffering on a horizontal plane and an inclined plane. The results show that the mechanism with the ends of the legs sliding can obtain a better dynamic performance. This study offers primary theories for buffering dynamics and an evaluation of landing buffer performance,and it establishes a theoretical basis for studies and engineering applications.

关键词： Bionic locust mechanism Landing and buffering Dynamic model Buffering performance

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BiCoO3-doped （Ko.47sN ***）（N bo.8Tao.2）03 lead-free piezoelectric ceramics

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Frontiers of Materials Science 2012年第4期6卷 311-318页

作者： ke-Pi chen Zhe ZHANG School of Energy Power and Mechanical EngineeringNorth China Electric Power UniversityBeijing 102206China

（1-x）（***）（***0.2）O3-xBiCoO3 （KNLNT-BC） lead-free piezoelectric ceramics were prepared by the conventional solid-state sintering method. Effects of the BC content on the phase structure, microstructure and electrical properties of KNLNT-BC ceramics were investigated. XRD patterns reveal that all the ceramic samples are in the pure perovskite-type structure, and the phase structure changes from the tetragonal to pseudo-cubic phase with the increase of the BC content. After the substitution of BC, the grain size is significantly reduced and relaxer behaviors are induced. By adding a small amount of BC to KNLNT ceramics, piezoelectric properties are improved, while further addition of BC makes the piezoelectric properties deteriorate markedly. The optimized electrical properties atx= 0.005 are as follows： d33 = 194 pC/N, kp = 0.44.

关键词： lead-free ceramic potassium sodium niobate BiCo03 piezoelectric property

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Innovative Modernization and Industrialization of Traditional Chinese Medicine

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Chinese Journal of Integrative Medicine 2020年第8期26卷 563-564页

作者： chen ke-ji CAS National Clinical Research Center for Chinese Medicine Cardiology Xiyuan HospitalChina Academy of Chinese Medical SciencesBeijing 100091China

Since the founding of New China 70 years ago,remarkable achievements have been attained in the fields of traditional Chinese medicine(TCM)and integrated Chinese and Western medicine(ICWM).At the education front,generations of new Chinese medicine practitioners have been trained and cultivated,and in basic medical research and clinical services,great strides were made drawing worldwide attention.

关键词： medicine(TCM) Medicine clinical

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