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Soil pH and dissolved organic carbon shape microbial communities in wetlands with two different vegetation types in Changdu area,Tibet

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Journal of Mountain Science 2023年第3期20卷 750-764页

作者： zou lan BAI Yin-ping HUANG Jing XIAO De-rong YANG Gang School of Life Science and Engineering Southwest University of Science and TechnologyMianyang 621010China College of Life and Environmental Science Wenzhou UniversityWenzhou 325035China State&Local Joint Engineering Research Center for Ecological Treatment Technology of Urban Water Pollution Wenzhou UniversityWenzhou 325035China

Soil microorganisms play pivotal roles in element biogeochemical cycling and ecological functions in wetland ecosystem,which may affect global climate *** in biotic and abiotic factors are known to affect soil microbial diversity,community structure and the corresponding ***,the relative importance of these biotic and abiotic factors on wetland soil microbial diversity and community structure on the QinghaiTibet Plateau remains poorly *** this study,we explored soil bacterial and fungal diversity and composition of five wetlands under two vegetation types(herbs vs Hippophae thibetana)in Changdu area,Tibet,through Illumina high throughput sequencing analysis of 16S rRNA for bacteria and internal transcribed spacer(ITS)for *** showed that soil bacterial alpha diversity was higher in *** dominated wetlands and was significantly and positively correlated with soil *** difference was detected in the soil fungal alpha diversity among samples and between vegetation *** dominant soil bacterial phyla were Proteobacteria,Actinobacteria,Acidobacteria,and *** Ascomycota,Basidiomycota and Mucoromycota were the dominant fungal *** bacterial and fungal community structures were significantly distinct by vegetation *** addition,redundancy analysis indicated that soil pH was the key factor shaping soil bacterial community ***,soil p H showed no effect on fungal ***,soil dissolved organic carbon was the major factor contributing to soil fungal community *** study emphasized that wetland soil microbial communities were distinct by vegetation types and the driving factors of microbial beta diversity between bacterial and fungal community were also different in wetlands in Changdu area.

关键词： SoilPproperty Microbialdiversity Bacterial community Fungal community Hippophae thibetana Qinghai-Tibet Plateau

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The structure of an electronegative magnetized plasma sheath with non-extensive electron distribution

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Plasma Science and Technology 2020年第12期22卷 1-7页

作者： xiu zou Huiping LIU Yongzheng ZHU Xiaonan ZHANG Minghui QIU School of Science Dalian Jiaotong UniversityDalian 116028People's Republic of China

In this paper, an electronegative magnetized plasma sheath model with non-extensive electron distribution is established, and the Bohm criterion affected by the non-extensive parameter q is theoretically derived. The ion Mach number varies with q. The numerical simulation results show that compared with electronegative magnetized plasma sheath with Maxwell distribution(q=1), the sheath structures with super-extensive distribution(q1) are different. The physical quantities including the sheath potential distribution, ion density distribution, the electron density distribution, negative ion density distribution and the net space charge density distribution are discussed. It is shown that the non-extensive parameter q has a significant influence on the structure of the electronegative magnetized plasma sheath. Due to the Lorentz force, both the magnitude and the angle of the magnetic field affect the structure of the sheath, whether the electrons are Maxwell distributed or non-extensively distributed.

关键词： plasma sheath non-extensive distribution

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Skill Premium, Biased Technological Change and Income Differences

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China & World Economy 2009年第6期17卷 64-87页

作者： Wei zou lan Liu Ziyin Zhuang Professor Associate Director Institute for Advanced Study School of Economics and Management Wuhan University Wuhan China Lecturer Business School Jianghan University Wuhan China Professor Institute for Advanced Study School of Economics and Management Wuhan University Wuhan China

Using 1987-2006panel data for China, we explore the dynamics of the skill premium. The present paper focuses on the skill premium as an explanation for why income differences are so large in China. Our empirics show that： the rise in the relative supply of skilled labor results in an increase, instead of a decrease, in the skill premium; domestic investment is not complementary with skill formation; the skill premium is higher in more developed provinces; economic openness facilitates an increase in the skill premium; whether foreign direct investment induces skill-based technology change or not, it drives up the skill premium. An array of policy prescriptions for reducing income differences and ensuring sustained economic growth are provided.

关键词： income differences skill biased technological change skill premium

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Design and test of robotic harvesting system for cherry tomato

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International Journal of Agricultural and Biological Engineering 2018年第1期11卷 96-100页

作者： Qingchun Feng Wei zou Pengfei Fan Chunfeng Zhang xiu Wang Beijing Research Center of Intelligent Equipment for Agriculture Beijing Academy of Agriculture and Forestry SciencesBeijing 100097China National Research Center of Intelligent Equipment for Agriculture Beijing 100097China Beijing Key Laboratory of Intelligent Equipment Technology for Agriculture Beijing 100097China

Harvesting of fresh-eating cherry tomato was highly costly on labor and *** order to achieve mechanical harvesting for the fresh-eating tomato,a new harvesting robot was designed,which consisted of a stereo visual unit,an end-effector,manipulator,a fruit collector,and a railed *** robot configuration and workflow design focused on the special cultivating *** key parts were introduced in detail:a railroad vehicle capably moving on both ground and rail was adopted as the robot’s carrier,a visual servo unit was used to identify and locate the mature fruits bunch,and the end-effector to hold and separate the fruit bunch was designed based on the stalk’s mechanical *** field test of the new developed robot was conducted and the results were *** successful harvest rate of the robot was 83%,however,each successful harvest averagely needed 1.4 times attempt,and a single successful harvesting cycle cost 8 s excluding the time cost on moving.

关键词： cherry tomato harvesting robot visual servo configuration design field test

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A Simple Model of Interaction between Journals, Authors and Editorial Board Members

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Chinese Physics Letters 2011年第1期28卷 222-225页

作者： zou Sheng-Rong XU Ying-Ying XU xiu-Lian WANG Jian HE Da-Ren College of Information Engineering Yangzhou University Yangzhou 225009 College of Physics Science and Technology Yangzhou University Yangzhou 225009

Recently, quantitative study on complex systems has become an attractive research area for physicists. Human scientific activity, including scientific paper publication, is an important complex system and therefore deserves an investigation. We present a simple model to describe the interaction between journals, authors and editorial board members. In the model the probabilities, with which a journal accepts papers from an author or invites him as an editorial board member, obey normal distributions. However, the most probable value of the latter distribution shifts such that the journal can have higher level authors being its editorial board members. The analytic derivation by the model is in rather good agreement with the empirical observation from the selected fifteen worldwide journals with different impact factors.

关键词： Statistical physics and nonlinear systems

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Inkjet printing for electroluminescent devices： emissive materials, film formation, and display prototypes

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Frontiers of Optoelectronics 2017年第4期10卷 329-352页

作者： Luhua lan Jianhua zou Congbiao JIANG Benchang LIU Lei WANG Junbiao PENG Institute of Polymer Optoelectronic Materials and Devices State Key Laboratory of Luminescent Materials and Devices South China University of Technology Guangzhou 510640 China

Inkjet priming （IJP） is a versatile technique for realizing high-accuracy patterns in a cost-effective manner. It is considered to be one of the most promising candidates to replace the expensive thermal evaporation technique, which is hindered by the difficulty of fabricating low-cost, large electroluminescent devices, such as organic light- emitting diodes （OLEDs） and quantum dot light-emitting diodes （QLEDs）. In this invited review, we first introduce the recent progress of some printable emissive materials, including polymers, small molecules, and inorganic colloidal quantum dot emitters in OLEDs and QLEDs. Subsequently, we focus on the key factors that influence film formation. By exploring stable ink formulation, selecting print parameters, and implementing droplet deposition control, a uniform film can be obtained, which in turn improves the device performance. Finally, a series of impressive inkjet-printed OLEDs and QLEDs prototype display panels are summarized, suggesting a promising future for IJP in the fabrication of large and high-resolution flat panel displays.

关键词： inkjet printing (IJP) inks system film forma-tion organic lightemitting diodes (OLEDs) quantum dotlight-emitting diodes (QLEDs)

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斜磁场作用下的射频等离子体平板鞘层结构

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物理学报 2006年第4期55卷 1907-1913页

作者：邹秀大连交通大学数理系大连116028

建立一个一维坐标空间、三维速度空间的斜磁场作用下的射频等离子体平板鞘层模型,讨论了磁场对射频鞘层结构及其参数特性的影响.研究结果表明:磁场对鞘层结构有不可忽略的影响,特别是能够使鞘层边界附近的离子速度分布和密度分布产生明... 详细信息

建立一个一维坐标空间、三维速度空间的斜磁场作用下的射频等离子体平板鞘层模型,讨论了磁场对射频鞘层结构及其参数特性的影响.研究结果表明:磁场对鞘层结构有不可忽略的影响,特别是能够使鞘层边界附近的离子速度分布和密度分布产生明显的变化.此外,虽然磁场不能改变离子总的能量密度分布,却能改变离子的运动状态,并同时影响着基板上离子在各个方向上的能量分布和入射偏移角度.

关键词：斜磁场射频等离子体平板鞘层模型入射偏移角度能量分布

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Avoiding sealing failure of flanged connection for tubes made of dissimilar materials subjected to elevated temperature

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Nuclear Science and Techniques 2019年第1期30卷 107-112页

作者： Qi-Ming Li Chong Zhou Jian Tian Yao Fu Yang zou Na-xiu Wang Shanghai Institute of Applied Physics Chinese Academy of Sciences

Carbonic composite materials and ceramics appear to be excellent structural materials for parts subjected to very high temperatures in molten salt reactors(MSRs), in which the reactor core outlet temperature is normally above 700℃. Because of the high temperature,there are major challenges in the sealing of flanged connections for tubes made of alloys and nonmetallic materials. In this study, an improved method for sealing bolted flange connections for tubes made of dissimilar materials at high temperature is analyzed. The study focuses on the compensation mechanism for the difference in thermal expansion between the bolts and the flanges. An angle is introduced for the sealing surface in the flanged connection to provide effective sealing. The arctangent of the angle is the ratio of the thickness between the theoretical core of the sealing surface and the outside end face of the flange to the distances between the axis of the flanged joint and the theoretical core of the sealing surface of the flange; the sealing surface of the flange, which is made of the same material as the fastening assemblies, faces the fastening assemblies. To ensure effective sealing, the frictional coefficient between the two sealing surfaces should not exceed the tangent of the angle. This result does not agree well with the solution given by previous researchers. Further, in the modified flanged connection, the compression of each bolt in the clamped condition is increased to maintain the compaction force unchanged without increasing the number of bolts on the flanged joint.

关键词： Sealing Composite flanged connections Thermal expansion Mechanical analysis Molten salt reactors

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0^+ tetraquark states from improved QCD sum rules:delving into X(5568)

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Chinese Physics C 2018年第4期42卷 76-86页

作者： Jian-Rong Zhang Jing-lan zou Jin-Yun Wu Department of Physics College of Liberal Arts and Sciences National University of Defense Technology Changsha 410073 China College of Optoelectronic Science and Engineering National University of Defense Technology Changsha 410073 China College of Liberal Arts and Sciences National University of Defense Technology Changsha 410073 China

In order to investigate the possibility of the recently observed X（5568） being a 0＋ tetraquark state, we make an improvement to the study of the related various configuration states in the framework of the QCD sum rules. Particularly, to ensure the quality of the analysis, condensates up to dimension 12 are included to inspect the convergence of operator product expansion （OPE） and improve the final results of the studied states. We note that some condensate contributions could play an important role on the OPE side. By releasing the rigid OPE convergence criterion, we arrive at the numerical value 5.57-0.23＋0.35 GeV for the scalar-scalar diquark-antidiquark 0＋ state, which agrees with the experimental data for the X（5568） and could support its interpretation in terms of a 0＋ tetraquark state with the scalar-scalar configuration. The corresponding result for the axial-axial current is calculated to be 5.77-0.33＋0.44 GeV, which is still consistent with the mass of X（5568） in view of the uncertainty. The feasibility of X（5568） being a tetraquark state with the axial-axial configuration therefore cannot be definitely excluded. For the pseudoscalar-pseudoscalar and the vector-vector cases, their unsatisfactory OPE convergence make it difficult to find reasonable work windows to extract the hadronic information.

关键词： tetraquark states QCD sum rules X(5568)

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A rapid multiplication system for'Candidatus Liberibacter asiaticus'through regeneration of axillary buds in vitro

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Journal of Integrative Agriculture 2022年第6期21卷 1683-1693页

作者： LEI Tian-gang HE Yong-rui zou xiu-ping WANG Xue-feng FU Shi-min PENG Ai-hong XU lan-zhen YAO Li-xiao CHEN Shan-chun ZHOU Chang-yong Citrus Research Institute Southwest University/National Citrus Engineering Research CenterChongqing 400712P.R.China

‘Candidatus Liberibacter asiaticus(CLas)’,which causes citrus Huanglongbing(HLB)disease,has not been successfully cultured in vitro to ***,a rapid multiplication system for CLas was established through in vitro regeneration of axillary buds from CLas-infected‘Changyecheng’sweet orange(Citrus sinensis Osbeck).Stem segments with a single axillary bud were cultured in vitro to allow CLas to multiply in the regenerating axillary buds.A high CLas titer was detected in the regenerated shoots on an optimized medium at 30 days after germination(DAG).This titer was 28.2-fold higher than in the midribs from CLas-infected trees growing in the *** minimize contamination during in vitro regeneration,CLas-infected axillary buds were micrografted onto seedlings of‘Changyecheng’sweet orange and cultured in a liquid *** this culture,the titers of CLas in regenerated shoots rapidly increased from 7.5×10^(4)to 1.4×10^(8)cellsμg^(-1)of citrus DNA during the first 40 *** percentages of shoots with>1×10^(8)CLas cellsμg^(-1)DNA were 30 and 40%at 30 and 40 DAG,*** tissue blot immunoassay(DTBIA)indicated that the distribution of CLas was much more uniform in regenerated plantlets than in CLas-infected trees growing in the *** disease symptoms in the plantlets were die-back,stunted growth,leaf necrosis/yellowing,and *** death rate of the plantlets was 82.0%at 60 *** results show that CLas can effectively multiply in citrus plantlests in *** method will be useful for studying plant-HLB interactions and for rapid screening of therapeutic compounds against CLas in citrus.

关键词： Citrus ‘Candidatus Liberibacter asiaticus’ multiplication in vitro citrus plantlets

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