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黄梁木幼林家系主要性状的观测与优良家系的初步选择

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广东农业科学 2015年第15期42卷 18-24页

作者：阙青敏欧阳昆唏李培李俊成张俊杰陈晓阳廖柏勇华南农业大学林学与风景园林学院广东广州510642 北京林业大学生物科学与技术学院北京100083

2011年从云南、广西、广东等地选择黄梁木幼树40株,2014年5月在广东雷州开展了家系造林对比试验,2015年1月的调查结果表明:树高、地径、冠幅、枝下高、冠高比、冠径比等生长性状在家系间差异极显著,性状家系遗传力均达到0.5以上,家系间... 详细信息

2011年从云南、广西、广东等地选择黄梁木幼树40株,2014年5月在广东雷州开展了家系造林对比试验,2015年1月的调查结果表明:树高、地径、冠幅、枝下高、冠高比、冠径比等生长性状在家系间差异极显著,性状家系遗传力均达到0.5以上,家系间选择潜力大;根据性状相关分析和回归检验判断,地径、树高、枝下高对材积指数的影响最大,在此基础上,构建了材积指数主要性状指数方程。以10%的入选率选出4个优良家系,4个优良家系的地径、树高、材积指数、枝下高、冠径比和冠高比的平均遗传增益分别为20.15%、20.49%、46.20%、9.98%、2.45%和-8.95%。

关键词：黄梁木遗传变异家系选择指数选择

Study on the Total Amount Control of Atmospheric Pollutant Based on GIS

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Biomedical and Environmental Sciences 2005年第4期18卷 233-237页

作者： JIAN-PING WANG xi-kun GUO College of Science Shantou University Shantou 51500 Guangdong China

To provide effective environmental management for total amount control of atmospheric pollutants. Methods An atmospheric diffusion model of sulfur dioxide on the surface of the earth was established and tested in Shantou of Guangdong Province on the basis of an overall assessment of regional natural environment, social economic state of development, pollution sources and atmospheric environmental quality. Compared with actual monitoring results in a studied region, simulation values fell within the range of two times of error and were evenly distributed in the two sides of the monitored values. Predicted with the largest emission model method, the largest emission of sulfur dioxide would be 54 279.792 tons per year in 2010. Conclusion The mathematical model established and revised on the basis of GIS is more rational and suitable for the regional characteristics of total amount control of air pollutants.

关键词： Total amount control of atmospheric pollutants Atmospheric diffusion model Pollution source GIS

Urdnet:A Cryo-EM Particle Automatic Picking Method

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Computers, Materials & Continua 2022年第7期72卷 1593-1610页

作者： Jianquan ouyang Yue Zhang kun Fang Tianming Liu xiangyu Pan School of Computer Science&School of Cyberspace Science Xiangtan UniversityXiangtan411105China Hunan Meteorological Information Center Hunan Meteorological BureauChangshaHunan410118China Department of Computer Science The University of GeorgiaAthensGeorgiaUSA

Cryo-Electron Microscopy(Cryo-EM)images are characterized by the low signal-to-noise ratio,low contrast,serious background noise,more impurities,less data,difficult data labeling,simpler image semantics,and relatively fixed structure,while U-Net obtains low resolution when downsampling rate information to complete object category recognition,obtains highresolution information during upsampling to complete precise segmentation and positioning,fills in the underlying information through skip connection to improve the accuracy of image segmentation,and has advantages in biological image processing like Cryo-EM *** article proposes A U-Net based residual intensive neural network(Urdnet),which combines point-level and pixel-level tags,used to accurately and automatically locate particles from cryo-electron microscopy images,and solve the bottleneck that cryo-EM Single-particle biologicalmacromolecule reconstruction requires tens of thousands of automatically picked *** 80S ribosome,HCN1 channel and TcdA1 toxin subunits,and other public protein datasets have been trained and tested on *** experimental results show that Urdnet could reach the same excellent particle picking performances as the mainstream methods of RELION,DeepPicker,and acquire the 3Dstructure of picked particleswith higher resolution.

关键词： Deep learning convolutional neural network particle picking cryo-electron microscopy single-particle reconstruction

Topological evolution of cerium(Ⅲ) molybdate microflake assemblies induced by amino acids

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Chinese Chemical Letters 2016年第5期27卷 673-677页

作者： Ming-kun Xu Zhen-Hua ouyang Zhu-Rui Shen Key Laboratory of Advanced Ceramics and Machining Technology Ministry of Education School of Materials Science and Engineering Tianjin University Institute of New Catalytic Materials Science Key Laboratory of Advanced Energy Materials Chemistry Ministry of Education College of Chemistry Nankai University Jiangsu Province Key Laboratory of Fine Petrochemical Engineering Changzhou University

In this work, cerium（Ⅲ） molybdate microspheres configured as microflakes were synthesized in the presence of lysine via a hydrothermal process. We studied the role of lysine and other amino acids on the morphologic control of cerium（IIl） molybdate crystals. First, with the increase of lysine, thinner microflakes and smaller microspheres are obtained. Moreover, a transformation in topology of cerium（Ⅲ） molybdate assemblies from three-dimensional （3D） into two-dimensional （2D） can be ascribed to controlled nucleation and growth of cerium（Ⅲ） molybdate induced by lysine. Second, amino acids with strong hydrophilic ＂R＂ groups tend to induce nucleation and result in spherical assemblies formed by nanoparticles or nanoflakes, while those with weaker hydrophilic ＂R＂ groups tend to induce growth and yield spherical assemblies of microflakes.

关键词： Hydrothermal Amino acidsSelf-assembly Cerium molybdate Morphology control

A convenient method to prepare random LA/CL copolymers from poly(L-lactide) and ε-caprolactone

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Science China Chemistry 2018年第6期61卷 708-714页

作者： Hao ouyang kun Nie Dan Yuan Yong Zhang Dongmei Cui Yingming Yao Key Laboratory of Organic Synthesis of Jiangsu Province Suzhou Key Laboratory of Macromolecular Design and Precision Synthesisand State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials College of Chemistry Chemical Engineering and Materials Science Dushu Lake Campus Soochow University School of Chemistry and Chemical Engineering Taishan University State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences

Sequential addition of L-lactide(LA) followed by ε-caprolactone(CL), and simultaneous addition of both monomers, afforded random LA/CL copolymers in the presence of lanthanide aryloxides under mild conditions. Transesterification was proved to play a predominant role in random copolymer formation. Moreover, treatment of poly(L-lactide) with ε-CL led to random copolymer formation, which provides a new strategy not only to prepare random LA/CL copolymers, but also to directly modify PLLA.

关键词： random copolymers lanthanide complex transesterification lactide ε-caprolactone

Towards Scalable Fabrications and Applications of 2D Layered Material-based Vertical and Lateral Heterostructures

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Chemical Research in Chinese Universities 2020年第4期36卷 525-550页

作者： WAN xi LI Hao CHEN kun XU Jianbin Engineering Research Center of IoT Technology Applications(Ministry of Education) Department of Electronic EngineeringJiangnan UniversityWuxi 214122P.R.China Department of Electronic Engineering and Materials Science and Technology Research Center The Chinese University of Hong KongShatinN.T.Hong Kong SAR 999077P.R.China State Key Laboratory of Optoelectronic Materials and Technologies School of Electronics and Information Technology and Guangdong Province Key Laboratory of Display MaterialSun Yat-sen UniversityGuangzhou 510275P.R.China

Among 108423 unique,experimentally known 3D compounds,there exist 1825 ones that are either easily or potentially *** increasingly broad library of 2D layered materials(2DLMs)with variable physical properties as well as the unique ability to vertical stacking or lateral stitching 2DLMs into complex heterostructures enables a new dimension for materials engineering and device design,offering novel functional electronics and optoelectronics for flexible *** this review,we present a comprehensive summary of the state-of-the-art scalable fabrication technologies,the unique properties as well as the potential device applications of the emerging 2D ***,we depict an overall picture of the 2D vertical van der Waals ***,we focus on the 2D lateral heterostructures by CVD *** a quick access and full coverage,both the vertical and lateral 2D heterostructures are classified into several types according to their chemical compounds with different *** the end,both the challenges and potential applications of these 2D heterostructures are discussed.

关键词： Two-dimensional(2D) Graphene Hexagonal boron nitride(hBN) Transition metal dichalcogenide Fabrication Vertical Lateral Heterostructure

The regulatory role of Pin1 in neuronal death

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Neural Regeneration Research 2023年第1期18卷 74-80页

作者： Shu-Chao Wang xi-Min Hu kun xiong Center for Medical Research The Second Xiangya Hospital of Central South UniversityChangshaHunan ProvinceChina Department of Anatomy and Neurobiology School of Basic Medical SciencesCentral South UniversityChangshaHunan ProvinceChina Hunan Key Laboratory of Ophthalmology ChangshaHunan ProvinceChina

Regulated cell death predominantly involves apoptosis,autophagy,and regulated *** is vital that we understand how key regulatory signals can control the process of cell ***1 is a cis-trans isomerase that catalyzes the isomerization of phosphorylated serine or threonine-proline motifs of a protein,thereby acting as a crucial molecular switch and regulating the protein functionality and the signaling pathways ***,we know very little about how Pin1-associated pathways might play a role in regulated cell *** this paper,we review the role of Pin1 in regulated cell death and related research progress and summarize Pin1-related pathways in regulated cell *** from the involvement of Pin1 in the apoptosis that accompanies neurodegenerative diseases,accumulating evidence suggests that Pin1 also plays a role in regulated necrosis and autophagy,thereby exhibiting distinct effects,including both neurotoxic and neuroprotective *** an enhanced understanding of Pin1 in neuronal death may provide us with new options for the development of therapeutic target for neurodegenerative disorders.

关键词： apoptosis autophagy calpain central nervous system necroptosis necrosis neurodegenerative diseases neuron Pin1 regulated neuronal death

Ablation characteristics of insulator under high-temperature gas dual-pulse erosion

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Defence Technology（防务技术） 2022年第10期18卷 1875-1885页

作者： Yang Liu xiao-cong Li Peng-fei Zhu kun xi Northwestern Polytechnical University 710072Xi'anPR China xi'an Modern Chemistry Research Institute 710065PR China Department of Aerospace Propulsion Technology Science and Technology on CombustionInternal Flow and Thermal-Structure LaboratoryShaanxiPR China

This study numerically simulated and investigated the flow field characteristics of a typical dual-pulse solid rocket motor with a soft pulse separation device through thermal insulation ablation under high-temperature dual-pulse *** ablation rate of ethylene-propylene-diene monomer(EPDM)insulator was measured after the *** results were analyzed through scanning electron microscopy and microcomputed *** ablation mechanism of the EPDM insulator under the operation conditions of a dual-pulse solid rocket motor was evaluated by analyzing the *** results reveal that the internal flow field of the motor with a soft pulse separation device is *** original charred layer existing on the EPDM insulator surface in the first pulse combustor is the decisive factor affecting the final ablation rate of the dual-pulse motor during the second pulse operation,and the ablation characteristic region is easily formed with the exfoliation of the charred *** ablation rate difference of the insulator increases with gas velocity.

关键词： Dual-pulse solid rocket motor High temperature gas Ablation PSD Charred layer

Influence of the Stark Shift on Entanglement Sudden Death and Birth in Cavity QED

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Chinese Physics Letters 2011年第1期28卷 12-15页

作者： ZHANG Jian-Song CHEN Ai-xi WU kun-Hua Department of Applied Physics East China Jiaotong University Nanchang 330013

＊Supported by the National Natural Science Foundation of China under Grant No 11065007 and 11047115, the Natural Science Foundation of Jiangxi Province under Grant Nos 2007GZW0819 and 2008GQW0017, the Scientific Research Foundation of Jiangxi Provincial Department of Education under Grant Nos G J J09504 and G J J10135, and the Foundation of Talent of Jinggang of Jiangxi Province under Grant No 2008DQ00400.

关键词： Separating Stark Shift