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evaluation and Analysis of Provincial Differences in Resources and environment Carrying Capacity in China

Chinese Geographical Science 2016年第4期26卷 539-549页

作者： CHeNG Jingyao ZHOU kan CHeN Dong FAN Jie Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 China Key Laboratory of Regional Sustainable Development Modeling Chinese Academy of Sciences Beijing 100101 China University of Chinese Academy of Sciences Beijing 100049 China State Information Center Beijing 100045 China

Resources and environment carrying capacity is central to not only regional sustainable development but also major function-oriented zoning. This paper presents an evaluation index system for resources and environment carrying capacity based on four aspects of carrying capacity(i.e., water resources, land resources, the environment, and ecosystems) by using a square deviation decision-making method, and on the basis of above effort evaluates the resources and environment carrying capacity across 31 provincial regions in China(not including Hong Kong, Macao and Taiwan regions of China). In addition, this paper evaluates the current state of socio-economic development, and analyzes the spatial distribution of resources and environment pressure. The results showed that distinct spatial differences in resources and environment carrying capacity and pressure across provincial regions. Resources and environment pressure is affected by both comprehensive resources and environment carrying capacity and socio-economic development. Regions subjected to lower degrees of resources and environment pressure will be restricted by resources and environmental problems through future courses of development owing to excessively low carrying capacities. By contrast, regions with higher comprehensive resources and environment carrying capacity will be subjected to excessively high levels of resources and environment pressure because of rapid socio-economic development. Both of resources and environment carrying capacity and pressure must therefore be considered in the allocation of country-binding targets to provincial regions.

关键词： carrying capacity square deviation decision-making method evaluation index system China

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Rupture of a rubber sheet by a cavitation bubble:an experimental study

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Acta Mechanica Sinica 2021年第10期37卷 1489-1497,I0001页

作者： Xing-Yu kan Jia-Le Yan Shuai Li A-Man Zhang College of Shipbuilding engineering Harbin Engineering UniversityHarbin150001China

Dynamics of spark-generated cavitation bubbles near a deformable rubber sheet are experimentally investigated in this *** transient bubble–rubber interaction is captured by high-speed photography,including the expansion and collapse of the bubble,jetting behaviors,large deformation,and rupture of the rubber *** dependence of bubble behaviors and rubber response on two governing parameters(the bubble–rubber stand-off distanceγand the rubber thickness T)are systematically ***,the bubble collapse patterns or jetting directions are categorized into three *** the bubble is initially located at a largeγfrom the rubber sheet,the jet is directed towards the boundary(regime I).Unexpectedly,when the generated bubble is close to the rubber sheet,it develops a jet away from the boundary(regime III).Bubble splitting and the formation of two axial liquid jets directing in opposite directions can only be observed with an intermediateγ(regime II).A phase diagram of the bubble behaviors is given in theγ–T *** a large rubber sheet thickness(e.g.,T=5 mm),only a downward jet is *** the perspective of jet direction,the effect of such a thick rubber sheet on the bubble dynamics is similar to that of a rigid *** that the jet velocity and jet width may be slightly ***,the results reveal that bubble expansion can cause the boundary to *** strong axial jet towards the rubber sheet can damage and even rupture the rubber boundary.A parameter range within which the bubble jetting can rupture the rubber boundary is ***,for a thin rubber sheet(T≤4 mm),the rupture is more likely to occur in regime *** a thick rubber sheet(e.g.,T=5 mm),the rupture can be seen when the jet directly impacts the rubber sheet(regime I).

关键词： Bubble dynamics Rubber boundary Rupture High-speed photography

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Polymer hydrogel confined palladium nanoparticles as recyclable catalysts for Suzuki and Heck cross-coupling reactions

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Chinese Chemical Letters 2020年第6期31卷 1630-1634页

作者： kan Zhan Ping Lu Jian Dong Xu Hou School of Chemistry and Chemical engineering Shaoxing UniversityShaoxing 312000China School of Chemistry and Chemical engineering Xiamen UniversityXiamen 361005China

Reusable palladium nanoparticles highly dispersed in porous and hydrophilic interpenetrating polymer networks(IPN),i.e.,Pd@IPN hybrid gels,are employed for catalysis of Suzuki and Heck coupling *** yields are obtained with high turnover frequencies when the reactions are run with very low *** use of IPN gives better recyclability than that of crosslinked polyvinyl alcohol *** polymer networks allow the reactants to have easy access to the Pd *** catalysts combine high activity with the reusability offered by the heterogeneous system,without the need for strong coordination or chelating ligands.

关键词： Nanoparticle Catalysis Hydrogels Palladium Water

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evaluation of host resistance and fungicide application as tools for the management of root rot of field pea caused by Aphanomyces euteiches

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The Crop Journal 2019年第1期7卷 38-48页

作者： Longfei Wu kan-Fa Chang Sheau-Fang Hwang Robert Conner Rudolph Fredua-Agyeman David Feindel Stephen e.Strelkov Department of Agricultural Food and Nutritional Science University of Alberta Crop Diversification Centre North Alberta Agriculture and Forestry Agriculture and Agri-Food Canada Morden Research and Development Centre

Aphanomyces root rot(ARR) of field pea(Pisum sativum), caused by Aphanomyces euteiches, can cause severe root damage, wilting, and large yield losses under wet soil conditions. To identify ways to manage this disease, the effect of A. euteiches inoculum density on field pea was studied under greenhouse and field conditions in 2015 and 2016. Increases in inoculum density reduced seedling emergence, root nodulation, and plant vigor, and resulted in increased root rot severity in both field and greenhouse tests. Seed treatments with the fungicides Apron Advance(thiabendazole + fludioxonil + metalaxyl) + Vibrance(difenoconazole + metalaxylM + sedaxane), INTeGO Solo(ethaboxam), BAS 516F(boscalid + pyraclostrobin), BAS 720F(metalaxyl + pyraclostrobin + fluxapyroxad), and BAS 516F + BAS 720F(3:1) were evaluated for their efficacy against ARR. All seed treatments except Apron Advance + Vibrance reduced root rot severity under controlled conditions. BAS 516F, BAS 720F and INTeGO Solo improved plant vigor and all treatments reduced seedling blight to varying degrees under greenhouse conditions, but not in the field. A collection of 22 pea genotypes was evaluated for resistance to root rot in field plot experiments. Line 00–2067 showed the least severe root rot symptoms,whereas ‘Spring D' showed the lowest reduction in yield. The results suggest that there may be an opportunity to combine partial host resistance and fungicidal seed treatments to adequately manage ARR of field pea.

关键词： Aphanomyces euteiches Field pea Fungicides Inoculum density Resistance

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Single-junction organic solar cell smashes performance record

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Science China Materials 2022年第9期65卷 2609-2610页

作者： Yanna Sun Huajun Xu Yuanyuan kan Ke Gao Science Center for Material Creation and energy Conversion Institute of Frontier and Interdisciplinary ScienceShandong UniversityQingdao 266237China

Organic solar cells(OSCs)have become a major focus in the field of the third-generation renewable energy thanks to their outstanding advantages of low cost,light weight and *** recent years,efforts dedicated to OSCs via material design,morphology optimization,and mechanism analysis have made remarkable progress,with power conversion efficiency(PCe)exceeding 19%.However,compared with inorganic solar cells(e.g.,Si or perovskite),the performance of OSCs remains limited by non-ideal exciton and charge transport.

关键词： exceeding performance record

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Semantic part segmentation of single-view point cloud

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Science China(Information Sciences) 2020年第12期63卷 251-253页

作者： Haotian PeNG Bin ZHOU Liyuan YIN kan GUO Qinping ZHAO State Key Laboratory of Virtual Reality Technology and Systems School of Computer Science and EngineeringBeihang University

As a classic topic in computer graphics, the semantic part segmentation of 3D data is helpful for3D part-level editing and modeling. Single-views point cloud is the raw format of 3D data. Giving each point a semantic annotation in single-view point cloud, i.e., single-view point cloud semantic part segmentation, is meaningful and challenging.

关键词： computers and graphics single-view point cloud annotation transfer semantic part segmentation category independent matching point clouds registration

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MRI多参数在鉴别诊断实性孤立性肺结节中的应用价值

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临床放射学杂志 2025年第1期44卷 87-94页

作者：刘小翠阚雪锋王玉锦李晶张桂林郑传胜夏黎明华中科技大学同济医学院附属协和医院放射科武汉430022 华中科技大学同济医学院附属同济医院放射科武汉430030

目的探讨MRI平扫、增强扫描序列及其定性、半定量、定量参数鉴别诊断良恶性实性孤立性肺结节(SPN)的应用价值。方法回顾性分析2017年12月至2023年1月70例实性SPN患者临床及影像资料,所有患者均使用T 1WI体积内插屏气检查(VIBe)序列、T ... 详细信息

目的探讨MRI平扫、增强扫描序列及其定性、半定量、定量参数鉴别诊断良恶性实性孤立性肺结节(SPN)的应用价值。方法回顾性分析2017年12月至2023年1月70例实性SPN患者临床及影像资料,所有患者均使用T 1WI体积内插屏气检查(VIBe)序列、T 2WI使用刀锋技术的快速自旋回波序列(blade)及其薄层序列、T 2WI半傅立叶单次激发快速自旋回波(HASTe)序列、扩散加权成像(DWI)平面回波成像(ePI)序列、动态对比增强(DCe)3D-VIBe序列行肺部MRI检查。采用视觉评估定性参数信号强度(SI)评分,使用dicom阅读软件绘制感兴趣区(ROI)并获取半定量参数信号强度比值(SIR)及定量参数表观扩散系数(ADC)值[平均ADC(ADC mean)、最小ADC(ADC min)],利用工作站后处理获取时间-信号强度曲线(TIC)与DCe-MRI定量参数[容积转运常数(K trans)、速率常数(K ep)、血管外细胞外间隙容积分数(V e)、增强曲线下初始面积(iAUC)],通过受试者工作特征曲线(ROC)评估诊断效能及Logistic回归方法绘制联合诊断ROC曲线,并通过曲线下面积(AUC)评估诊断效能。结果不同序列T 2WI与DWI参数(SI评分与比值)、ADC mean、ADC min、K trans、K ep、iAUC均对良恶性SPN的鉴别诊断具有良好价值(Pe SIR、DWI SIR、ADC min)绘制联合诊断ROC曲线,其诊断效能较单独诊断显著提高(Pe-MRI检查及其定量、半定量、定性参数可以用于良恶性SPN的鉴别诊断,并且联合这些参数可以显著提高其诊断效能。

关键词：孤立性肺结节磁共振成像定量参数定性参数鉴别诊断

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A bi-scale assessing framework for aesthetic ecosystem services of villages in a world heritage site

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Journal of Mountain Science 2022年第3期19卷 874-891页

作者： DING Yin-ping LIU Zhi-lin JIAO Yuan-mei XU Qiu-e ZHANG kan-feng LIU Cheng-jing CHeN Fan Faculty of Geography Yunnan Normal UniversityKunming 650500China

The relative spatial scale relationship of observers and ecosystem and their aesthetic dynamic interaction process are fundamental to evaluation and optimization of aesthetic ecosystem service(AeS).A comprehensive and efficient framework for the assessment of AeS is lack in the integration of scale relationship and dynamic *** study took 9 villages in 4 different developmental stages(traditional,folk,rapidly changed,newly built)in Honghe Hani Rice Terraces,a world heritage site,as the research *** two scales,viewing from inside and outside,the bi-scale assessing framework was established,which includes the three components of interaction process,connection area(as precondition of interaction),quality(as result of interaction),and influencing factors of quality(elements’characteristics of villages).Among them,the connection areas were evaluated with visual and traffic accessibility along the *** quality and influencing factors were evaluated through participatory preferences methods by expert *** influencing factors include 9 characteristics,such as,space size,architecture layout,vegetation species richness,color *** results suggested that villages with high AeS quality and low accessibility need to be optimized,and the key influencing factors are space size,architecture layout,color harmony and surrounding ***,the bi-scale assessing framework can provide important references for decision making and visual protection regulations on the villages.

关键词： Aesthetic ecosystem service Bi-scale framework Hani Rice Terraces World heritage Minority village

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Rapid Synthesis of Piezoelectric ZnO-Nanostructures for Micro Power-Generators

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Journal of Materials Science & Technology 2013年第10期29卷 893-897页

作者： Nai-Feng Hsu Tien-kan Chung Ming Chang Hong-Jun Chen Department of General education Army Academy Department of Mechanical engineering National Chiao Tung University Department of Mechanical engineering Chung Yuan Christian University State Key Laboratory of Digital Manufacturing equipment and Technology Huazhong University of Science and Technology

In this paper, we report a rapid synthesis of piezoelectric ZnO-nanostructures and fabrication of the nanostructures- based power-generators demonstrating an energy conversion from an environmental mechanical/ultrasonic energy to an electrical energy. The ZnO nanostructures are grown on a silicon wafer by a modified chemical solution method （CSD, chemical-solution-deposition） with a two-step thermal-oxidation approach. The synthesis process can be completed within 1 h. By varying the mixture-ratio of Zn micro-particles in an oxalic acid solution with 0.75 mol/l concentration in the CSD process, the growth mechanism is well-controlled to synthesize three different types of ZnO-nanostructures （i.e., dandelion-like nanostructures, columnar nanostructures, and nanowires）. Furthermore, through oxidizing at different temperatures in the thermal-oxidation process, the featured geometry of the nanostructures （e.g., the length and diameter of a nanowire） is modified. The geometry, size, morphology, crystallization, and material phase of the modified nanostructures are characterized by scanning electron microscopy and X-ray diffraction. Finally, the nanostructures are used to fabricate several micro power-generators. Through the piezoelectric effect, a maximum current density output of 0.28 μA cm-2 generated by a power-generator under an ultrasonic wave is observed.

关键词： Piezoelectric ZnO nanostructures Chemical solution method Thermal-oxidation Power-generator

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effects of Driving Mode on the Performance of Multiple-Chamber Piezoelectric Pumps with Multiple Actuators

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Chinese Journal of Mechanical engineering 2015年第5期28卷 954-963页

作者： ZHANG Zhonghua kan Junwu WANG Shuyun WANG Hongyun MA Jijie JIANG Yonghua Institute of Precision Machinery Zhejiang Normal University

Due to the limited output capability of piezoelectric diaphragm pumps, the driving voltage is frequently increased to obtain the desired output. However, the excessive voltage application may lead to a large deformation in the piezoelectric ceramics, which could cause it to breakdown or become damaged. Therefore, increasing the number of chambers to obtain the desired output is proposed. Using a check-valve quintuple-chamber pump with quintuple piezoelectric actuators, the characteristics of the pump under different driving modes are investigated through experiments. By changing the number and connection mode of working actuators, pump performances in terms of flow rate and backpressure are tested at a voltage of 150 V with a frequency range of 60 Hz -400 Hz. experiment results indicate that the properties of the multiple-chamber pump change significantly with distinct working chambers even though the number of pumping chambers is the same. Pump performance declines as the distance between the working actuators increases. Moreover, pump performance declines dramatically when the working piezoelectric actuator closest to the outlet is involved. The maximum backpressures of the pump with triple, quadruple, and quintuple actuators are increased by 39%, 83%, and 128%, respectively, compared with the pump with double working actuators; the corresponding maximum flow rates of the pumps are simply increased by 25.9%, 49.2%, and 67.8%, respectively. The proposed research offers practical guidance for the effective utilization of the multiple-chamber pumps under different driving modes.

关键词： piezoelectric pump multiple chambers multiple actuators driving mode flow rate backpressure

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