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STATUS AND DYNAMIC CHANGE OF REGIONAL MAN- LAND SYSTEM IN VIEW OF MICRO-LEVEL QUANTITATIVE ASPECT -Case Study of Gongyi City of Henan Province

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Chinese Geographical Science 2006年第1期16卷 9-17页

作者： QIAO Jia-jun LI Xiao-jian kong Yun-feng Key Research Institute of Yellow River Civilizatin and Sustainable Development Henan University Kaifeng 475001 P.R.China College of Environment and Planning Henan University Kaifeng 475001 P.R.China

A micro-level analysis on man-land system is important in understanding the content of human geography in rural areas, particularly in the different regions. This paper is based on a survey undertaken in the three villages of Wugou Village, Hutuo Village, and Xiaonan Village of Gongyi City, ltenan Province in April 2003. The survey covers three types of economic and social activities from 214 households. Data collected include 120 attributes for each household. By using theories from the relevant disciplines such as geography, mathcmatics, physics, ecology, and system sciences, this paper develops a framework employing the concept of system entropy in the status function of the man-land system. In this framework, the entropy change is used to show the evolution of the system, and the entropy flow to express the flow among the spatial parts of the system. Following the framework, and using a large set of household data from surveys, the paper makes a quantitative analysis of the village-level man-land system from a micro-perspective. After a theoretical investigation, the corresponding strategies in the paper are then put forward in order to adjust the unbalanced trend of the village man-land system from both perspectives of small-area and individual actors.

关键词： man-land system village-level region system entropy

Wind speed change regionalization in China(1961-2012)

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Advances in Climate Change Research 2015年第2期6卷 151-158页

作者： SHI Pei-Jun ZHANG Gang-feng kong feng YE Qian State Key Laboratory of Earth Surface Processes and Resource Ecology Beijing Normal University Key Laboratory of Environmental Change and Natural Disaster of Ministry of Education Beijing Normal University Academy of Disaster Reduction and Emergency Management Ministry of Civil Affairs & Ministry of Education College of Earth and Environmental Sciences Lanzhou University

This research quantitatively recognized the wind speed change using wind speed trend and trend of wind speed variability from 1961 to 2012 and regionalized the wind speed change on a county-level *** mean wind speed observation data and linear fitting method were *** findings suggested that level-I regionalization includes six zones according to wind speed trend value in different regions,*** ChinaeNorth China substantial declining zone,EasteCentral China declining zone,Southeast China slightly declining zone,Southwest China very slightly declining zone,Northwest China declining zone,and QinghaieTibetan Plateau slightly declining ***-II regionalization divides China into twelve regions based on trend of wind speed variability and the level-I regionalization results.

关键词： Wind speed trend Regionalization Wind speed variab

A Network-Attached Storage System Supporting Guaranteed QoS

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Wuhan University Journal of Natural Sciences 2005年第5期10卷 838-842页

作者： kong Hua-feng YU Sheng-sheng LU Hong-wei School of Computer Science and Technology Huazhong University of Science and Technology Wuhan 430074 Hubei China

We propose a network-attached storage system that can support guaranteed Quality of Service （QoS）, called POPNet Storage. The special policy of date access and disk scheduling is enable users to access files quickly and directly with guaranteed QoS in the POPNet Storage. The POPNet Storage implements a measurement-based admission control algorithm （PSMBAC） to determine whether to admit a new data access request stream and admit as many requests as possible while meeting the QoS guarantees to its clients. The data reconstruction algorithms in the POPNet Storage also put more emphasis on data availability and guaranteed QoS, thus it is designed to complete the data recovery as soon as possible and at the same time provide the guaranteed QoS for high-priority data access. The experiment results show that the POPNet Storage can provide more significant performance, reliability, and guaranteed QoS than conventional storage systems.

关键词： network-attached storage storage system QoS disk scheduling admission control

我国有色金属行业产品碳足迹评价标准现状及思考

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绿色矿冶 2024年第1期40卷 1-6页

作者：刘志英李明茂陈嬿娉孔锋江西理工大学江西赣州341000 鹰潭市检验检测认证院江西鹰潭335000

我国是世界有色金属生产和消费大国,进行有色金属产品碳足迹评价标准研究,对推动有色金属行业低碳转型高质量发展、克服绿色贸易壁垒有重要意义。本文梳理了我国针对“碳达峰碳中和”战略目标实施制定的相关政策,总结了我国有色金属行... 详细信息

我国是世界有色金属生产和消费大国,进行有色金属产品碳足迹评价标准研究,对推动有色金属行业低碳转型高质量发展、克服绿色贸易壁垒有重要意义。本文梳理了我国针对“碳达峰碳中和”战略目标实施制定的相关政策,总结了我国有色金属行业制定和修订产品碳足迹评价标准的必要性、紧迫性、技术基础、组织保障;结合有色行业产品碳足迹评价标准现状,提出了系列建议。

关键词：有色金属碳中和碳排放产品碳足迹标准化

Controlled Synthesis and Electrochemical Behavior of Single-crystal MoO_2 Nanowhiskers by a Facile Precursor-reduction Route

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Chinese Chemical Letters 2006年第6期17卷 825-828页

作者： Yu Mei kong Jun PENG feng Shan SHEN Bao Xia DONG Li Ll Key Laboratory of Polyoxometalate Science of Ministry of Education Faculty of Chemistry Northeast Normal University Changchun 130024

A novel method for controlled synthesis of crystalline molybdenum dioxides nanowhiskers （whisker-MoO2） by using moderate reductive and precursor ion under hydrothermal conditions is reported. The result shows that the as-obtained samples have a monoclinic structure, and the whisker-MoO2 is composed of nanowires with diameters of ca. 20 nm. Formation of whisker-MoO2 was through a typical precursor-reduction process, in which cetyltrimethylammonium bromide （CTAB） served as a cationic surfactant and acetone as a reductant. The electrochemical behavior of whisker-MoO2 was studied.

关键词： Synthetic methods characterization MoO2 nanowhiskers electrochemical behavior.

Which Neighborhoods Have Easier Access to Online Home Delivery Services?A Spatiotemporal Accessibility Analysis in Nanjing,China

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Chinese Geographical Science 2024年第4期34卷 722-738页

作者： kong Yu ZHEN feng ZHANG Shanqi SHEN Lizhen School of Architecture and Urban Planning Nanjing UniversityNanjing 210093China Provincial Engineering Research Center of Smart City Planning and Digital Governance Nanjing 210093China

The rise in online home delivery services(OHDS)has had a significant impact on how urban services are supplied and used in recent *** on the spatial accessibility of OHDS are emerging,but few is known about the temporal dimension of OHDS accessibility as well as the geographic and socioeconomic differences in the spatiotemporal accessibility of *** study measures the spatiotemporal accessibility of four types of OHDS,namely leisure,fresh and convenient,medical,and catering *** geographic and socioeconomic disparities in the spatiotemporal accessibility of these four types of OHDS are then identified using spatial statistical methods and the Kruskal-Wallis test(K-W test).The case study in Nanjing,China,suggests that:1)spatiotemporal accessibility better reflects the temporal variation of OHDS accessibility and avoids overestimation of OHDS accessibility when only considering its spatial dimension.2)The spatiotemporal accessibility of OHDS varies geographically and *** located in the main city or neighborhoods with higher housing prices,higher population density,and higher point of interest(POI)mix have better OHDS spatiotemporal *** study contributes to the understanding of OHDS accessibility from a spatiotemporal perspective,and the empirical insights can assist policymakers in creating intervention plans that take into account variations in OHDS spatiotemporal accessibility.

关键词： online home delivery services(OHDS) spatiotemporal accessibility neighborhoods accessibility differences Nanjing City China

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不同处理对百合鳞片扦插诱导小鳞茎的影响

安徽农业科学 2024年第7期52卷 46-51页

作者：唐文锦孔祥凤高丽何恒斌贾桂霞北京林业大学园林学院/国家花卉工程技术研究中心北京100083 北京草桥杨镇花木种植基地北京101300

为丰富百合扦插繁殖技术体系,筛选出合适的扦插处理组合,以百合新品种“骄阳”为试验材料,探究不同基质配比和肥料处理组合、植物生长调节剂种类和浓度、鳞片位置对其鳞片扦插的影响。结果表明,纯珍珠岩更有利于小鳞茎的生成,纯蛭石有... 详细信息

为丰富百合扦插繁殖技术体系,筛选出合适的扦插处理组合,以百合新品种“骄阳”为试验材料,探究不同基质配比和肥料处理组合、植物生长调节剂种类和浓度、鳞片位置对其鳞片扦插的影响。结果表明,纯珍珠岩更有利于小鳞茎的生成,纯蛭石有利于小鳞茎发育和后期根系生长,复合肥作底肥并不适用于其扦插繁殖;最优基质配比+肥料组合为纯蛭石+水溶肥处理,其所生成小鳞茎较多,且小鳞茎直径最大、生根数量最多、根长最长;外层鳞片有利于小鳞茎生成,中外层鳞片利于小鳞茎发育和后期根系生长;IBA的扦插生根效果优于NAA;最优鳞片位置+生长调节剂组合为中层鳞片+IBA 200 mg/L,其所生成小鳞茎较多,所产生的小鳞茎直径较大,且生根数量最多、生根较长,研究结果为百合新品种“骄阳”的种球繁育奠定了技术基础。

关键词：百合鳞片扦插基质配比植物生长调节剂

维普期刊数据库博看期刊

紧凑环芯部加料装置用大电流高重频脉冲电源系统的研制

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核聚变与等离子体物理 2024年第3期44卷 304-311页

作者：李运海叶扬唐良浩谭名昇童义杨荣谢晓峰邓天白孔德峰陶骏合肥质子跃动科技有限公司合肥230088 合肥综合性国家科学中心能源研究院合肥230031 安徽大学电气工程与自动化学院合肥230601

紧凑环注入(CTI)技术是聚变装置实现堆芯加料的有效手段,为实现CTI设计了一套大电流、高重复频率脉冲电源系统。对等效后的RLC二阶放电电路进行集总参数计算公式推导,得出了放电电流峰值、半波周期等关键参数的计算公式,并设计了四路脉... 详细信息

紧凑环注入(CTI)技术是聚变装置实现堆芯加料的有效手段,为实现CTI设计了一套大电流、高重复频率脉冲电源系统。对等效后的RLC二阶放电电路进行集总参数计算公式推导,得出了放电电流峰值、半波周期等关键参数的计算公式,并设计了四路脉冲电源的基本参数;进一步进行了参数建模仿真,给出仿真波形和结果参数。对关键的放电开关器件进行分析选型,并设计电源低感安装结构。在全超导托卡马克紧凑环注入装置(EAST-CTI)上对电源进行了放电测试,通过远程控制软件灵活设置参数和控制电源的工作时序,实际放电波形、输出电流参数与理论计算和仿真吻合性好。电源系统的峰值电流超过300kA,重复频率为2Hz,这表明所设计的电源系统可以有效地应用于紧凑环注入装置,并具有良好的工程实用价值。

关键词：紧凑环注入装置高压脉冲电源引燃管芯部加料技术

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鸡骨粉理化性质及其对全麦饼干品质的影响

食品科技 2024年第6期49卷 147-152页

作者：邱心茹张源蒋远帅高文慧刘友雪衣春颖李悦孔峰聊城大学药学与食品工程学院山东聊城252000

文章主要研究了鸡骨粉自身理化性质及其对全麦饼干品质的影响。鸡骨粉碎2 min和8 min后得到粗粉和细粉,采用激光粒度仪测定鸡骨粉粒径特征,检测其蛋白质、脂肪、灰分、钙和磷含量,分析鸡骨粉持水性和持油性;将鸡骨粉按3:7比例添加到全... 详细信息

文章主要研究了鸡骨粉自身理化性质及其对全麦饼干品质的影响。鸡骨粉碎2 min和8 min后得到粗粉和细粉,采用激光粒度仪测定鸡骨粉粒径特征,检测其蛋白质、脂肪、灰分、钙和磷含量,分析鸡骨粉持水性和持油性;将鸡骨粉按3:7比例添加到全麦面粉中制作鸡骨全麦饼干,对混合粉溶剂保持力进行检测,测定饼干的硬度、延展度、颜色和营养成分,并对鸡骨全麦饼干进行感官评价。结果表明,相比于粗粉,鸡骨细粉平均粒径降低了20.71%,持水性和持油性分别显著提高了5.98%和37.37%;鸡骨粉显著增加了混合粉的碳酸钠、水、蔗糖溶剂保持力,对乳酸溶剂保持力没有显著影响;添加鸡骨细粉的饼干,硬度与普通全麦饼干无显著差异,延展度显著增加了27.16%;添加鸡骨细粉对全麦饼干的颜色影响较小,提升了全麦饼干的营养价值;添加鸡骨粉降低了全麦饼干的感官品质,相同情况下,鸡骨细粉饼干营养价值和感官品质相对较好。粒径较小的鸡骨粉拥有较好的理化性质,对全麦饼干品质有积极的影响。

关键词：鸡骨粒径特征全麦饼干溶剂保持力感官评价