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The evolution of tea spatial agglomeration in China:An analysis based on different geographical scales

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Journal of Mountain Science 2018年第12期15卷 2590-2602页

作者： LIU Han-chu FAN Jie ZENG Yu-xi wang wen-zhao Key Laboratory of Regional Sustainable DevelopmentModeling ChineseAcademy of SciencesBeijing 100101China Institute of C-eography Science andNatural Resources Research ChineseAcademy of SciencesBeIjing 100101China University of Chinese Academy of Sciences Beijing 10049China National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research (Wuhan) Huazhong Agricultural UniversityWuhan 430070China

The spatial agglomeration of agricultural production is conducive to reducing planting costs, increasing production efficiency and improving product quality. It is an important way to promote the transformation and upgrad of tea industry and realize the modernization of China's tea industry. This study used Gini coefficient and spatial autocorrelation analysis to explore the characteristics of tea spatial agglomeration in China from three geographical scales: regional level, provincial level and prefecture level from the year 2005 to 2015. The results indicated that there was a significant scale effect on the tea spatial agglomeration. The agglomeration degree increased from the regional level, provincial level to prefecture level. The types of spatial agglomeration evolution of the three scales were Ushaped, continuous diffusion, and continuous agglomeration. The spatial autocorrelation of tea production could only be found at the prefecture level. Meanwhile, at the prefecture scale, we could not only reveal the pattern changes at the regional and provincial levels, but also identify tea production agglomeration regions. Compared with the large scale, the small scale could reveal the characteristics of tea spatial agglomeration in more details. Factors such as natural resource endowments, cost factor, technological advancement, agglomeration economy, and agricultural policy influenced the evolution of tea spatial agglomeration from different geographical scales. Finally, from the perspectives of spatial transfer of tea production, promoting spatial agglomeration, building tea production bases, and breaking administrative boundaries, we proposed several policy suggestions for optimizing the spatial layout of tea production.

关键词： Tea production Spatial agglomeration Geographic scale Driving Factors China

A new contact material—Ag/SnO_2-La_2O_3-Bi_2O_3

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Rare Metals 2002年第4期21卷 289-293页

作者： LU Jianguo, wang Jingqin, zhao Jingying, wen Ming, wang Baozhu, and wang XiaohongInstitute of Electrical Apparatus, Hebei University of Technology, Tianjin, 300130, China Institute of Electrical Apparatus Hebei University of Technology 天津 300130 Institute of Electrical Apparatus Hebei University of Technology Tiaojin 300130

A super-fine compound powder, Ag/SnO_2+La_2O_3+ Bi_2O_3, has been obtainedusing the chemical coprecipitation method. And a new contact material, Ag/SnO_2+La_2O_3+Bi_2O_3, wasproduced by the powder metallurgy method. Its properties are as follows: the density is 9.75-9.93g/cm^3, the resistivity is 2.31-2.55 μΩ ·cm, the hardness is 880-985 MPa. Its mi-crostructureshows that the fine oxides have a uniform distribution in the silver matrix. The results ofmake-break capacity and temperature rise testing show that the new material has better ability ofanti-arc erosion and lower temperature rise than that of commonly used Ag/CdO.

关键词： contact material silver rare earth oxide powder metallurgy microstructure additive

Synthesis and characterization of new biodegradable thermosensitive polyphosphazenes with lactic acid ester and methoxyethoxyethoxy side groups

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Chinese Chemical Letters 2010年第2期21卷 237-241页

作者： Bi, Yun Mei Gong, Xiao Ying wang, wen zhao Yu, Li Hu, Min Qi Shao, Li Dong Yunnan Normal Univ Coll Chem & Engn Kunming 650092 Peoples R China Chongqing Coll Sci & Technol Coll Chem & Chem Engn Chongqing 40042 Peoples R China

Two novel biodegradable thermosensitive polyphosphazenes with lactic acid ester and methoxyethoxyethoxy side groups were synthesized via the macromolecular substitution reactions of poly(dichlorophosphazene) with the sodium salt of lactic acid ester and sodium *** structures were confirmed by ^(31)p NMR,~1H NMR,^(13)C NMR,IR,DSC,and elemental *** lower critical solution temperature(LCST) behavior in water and in vitro degradation property of the polymers was ***...

关键词： Polyphosphazene Lactic acid ester Methoxyethoxyethoxy Biodegradation Thermosensitive polymer

Effects of SiC and MgO on alumina-based ceramic foams filters

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China Foundry 2007年第4期4卷 292-295页

作者： CAO Da-li ZHOU Jing-yi JIN Yong-ming MA Lei SHI Zhong-ning wang zhao-wen Shenyang Institute of Chemical Technology Shenyang 110142 China Shenyang Research Institute of Foundry Shenyang 110022China School of Materials and Metallurgy Northeastern University Shenyang 110006 China

Alumina-based foam ceramic filters were fabricated by using alumina,SiC,magnesia powder as major *** has been found that this ceramic filter has a uniform macrostructure for filtering molten *** influences of SiC and magnesia content,the sintering temperatures on ceramic properties were ***-based foam ceramic filters containing 2.2 mass% magnesia and 7.6 mass% SiC has a compressive strength of 1.36 MPa and a thermal shock resistance of 5 *** main phases after 1 hour sintering at 1 500℃ consist of alumina,silicon carbide,spinel and mullite.

关键词： alumina-based foam ceramic filters compressive strength molten metal MgO SiC

Original article Predictive value of RIFLE classification on prognosis of critically ill patients with acute kidney injury treated with continuous renal replacement therapy

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Chinese Medical Journal 2009年第9期 1020-1025页

作者： LI wen-xiong CHEN Hui-de wang Xiao-wen zhao Song CHEN Xiu-kai ZHENG Yue SONG Yang Department of Surgical Intensive Care Unit Beijing Chaoyang Hospital Capital Medical University Beijing 100020 China

Background The optimal timing to start continuous renal replacement therapy （CRRT） for acute kidney injury （AKI） patients has not been accurately established. The recently proposed risk, injury, failure, loss, end-stage kidney disease （RIFLE） criteria for diagnosis and classification of AKI may provide a method for clinicians to decide the ＂optimal timing＂ for starting CRRT under uniform guidelines. The present study aimed：（1） to analyze the correlation between RIFLE stage at the start of CRRT and 90-day survival rate after CRRT start, （2） to further investigate the correlation of RIFLE stage with the malignant kidney outcome in the 90-day survivors, and （3） to determine the influence of the timing of CRRT defined by RIFLE classification on the 90-day survival and malignant kidney outcome in 90-day survivors.Methods A retrospective cohort analysis was performed on the data of 106 critically ill patients with AKI, treated with CRRT during a 6-year period in a university affiliated surgical intensive care unit （SICU）. Information such as sex, age, RIFLE stage, sepsis, sepsis-related organ failure assessment （SOFA） score, number of organ failures before CRRT, CRRT time during SICU, survival, and kidney outcome conditions at 90 days after CRRT start was collected. According to their baseline severity of AKI at the start of CRRT, the patients were assigned to three groups according to the increasing severity of RIFLE stages： RIFLE-R （risk of renal dysfunction, R）, RIFLE-I （injury to the kidney, I） and RIFLE-F （failure of kidney function, F） using RIFLE criteria. The malignant kidney outcome was classified as RIFLE-L （loss of kidney function L） or RIFLE-E （end-stage kidney disease, E） using RIFLE criteria. The correlation between RIFLE stage and 90-day survival rate was analyzed among these three RIFLE-categorized groups. Additionally, the association between RIFLE stage and the malignant kidney outcome （RIFLE-L＋RIFLF-E） in the 90-day survivors was *** Fif

关键词： RIFLE classification renal replacement therapy acute kidney injury prognosis

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液相组合合成的纯化方法

有机化学 2007年第12期27卷 1453-1462页

作者：王文昭方唯硕中国医学科学院药物研究所中草药物质基础与资源利用教育部重点实验室北京100050

综述了近8年来液相平行合成和组合合成中应用的不同技术,包括可溶性载体、氟合成技术、离子液体、固相试剂树脂以及低聚乙烯二醇(OEG)衍生物的应用等几方面内容.论述了它们的基本原理以及相关的应用实例,并着重强调了目标化合物的分离... 详细信息

综述了近8年来液相平行合成和组合合成中应用的不同技术,包括可溶性载体、氟合成技术、离子液体、固相试剂树脂以及低聚乙烯二醇(OEG)衍生物的应用等几方面内容.论述了它们的基本原理以及相关的应用实例,并着重强调了目标化合物的分离纯化方法.

关键词：液相组合合成液相平行合成纯化方法可溶性载体氟技术固相辅助剂离子液体 OEG衍生物标记

Critical Understanding of the Notion of Integrative and Instrumental Motivational Orientations

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海外英语 2019年第19期 11-13页

作者：王文昭青海师范大学

How to motivate L2 learners in their learning process is a fundamental and universal question for L2 teachers and educa?tors throughout the *** the issues concerning L2 motivation has been investigated a lot and there have been many established frameworks,it is worth comparing how different scholars define the same concept in this globalised *** critical analysis of the concept of“integrative and instrumental”motivational orientations proposed by Gardner and Dornyei,this paper aims to compare the similarities and differences between the two *** addition,how these two models could re?late to current teaching practice from a globalised stance and the empirical researches done by these two authors and other schol?ars are also ***,whatever the framework the L2 teachers decide to adopt,specific and appropriate activity is suggested to design in each specific learning context so as to maximize the level of L2 learners’self-motivation ability and their awareness.

关键词： second language teaching integrative motivation instrumental motivation

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《中国园林美学》序

中国园林 2011年第10期27卷 38-39页

作者：王朝闻

2011年5月下旬在苏州,与摄影家丁虹君重逢。得知金学智君正要出《中国园林美学》一书,他正为此书拍摄园林风景作插图。我很赞成这方面的研究工作兴旺起来,生活实践很需要这方面的理论。

关键词：《中国园林美学》园林风景生活实践摄影家

MgCl_2-KCl-AlF_3-(La_2O_3)熔盐体系电解制备Al-Mg-La中间合金

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东北大学学报（自然科学版） 2016年第7期37卷 964-968页

作者：张福男王兆文东北大学冶金学院辽宁沈阳110819 金策工业综合大学朝鲜平壤999093

在质量比为41.5∶48.5∶10的MgCl2-KCl-AlF3熔盐体系中加入质量分数为0.6%La2O3,利用电解法制备了Al-Mg-La合金.用ICP-OES（电感耦合等离子体光谱仪）和XRD进行了合金的组成和物相分析.研究结果表明,在电解温度800℃,阴极电流密度6.92A/... 详细信息

在质量比为41.5∶48.5∶10的MgCl2-KCl-AlF3熔盐体系中加入质量分数为0.6%La2O3,利用电解法制备了Al-Mg-La合金.用ICP-OES（电感耦合等离子体光谱仪）和XRD进行了合金的组成和物相分析.研究结果表明,在电解温度800℃,阴极电流密度6.92A/cm2,槽电压5.3-5.4V,电解时间为1h的条件下,电流效率为86.2%,得到的合金主相为α-Mg基体、β-Al12Mg17相与Al11La3相.高的阴极电流密度有利于合金中镁含量的增加.

关键词：稀土La Al-Mg-La中间合金 MgCl2-KCl系 MgCl2-KCl-AlF3-La2O3熔盐体系 Al12Mg17相