Construction of Beautiful Countryside in Yongchun County of Fujian Province from Perspective of Watershed Comprehensive Management

近年来,中国正在从经济、社会、生态及人与自然和谐等多角度出发在流域沿岸乡村实施美丽乡村建设。这不仅加快了农村基础设施配套建设,促进了农村生态农业的发展,也极大地增加了农村生态环境治理力度,对流域治理起到了一定的间接推动作用。以福建省桃溪流域永春县的美丽乡村建设为背景,调研美丽乡村实施前后农村生产、生活方式的改变和居民水环境保护意识的变化,并结合水环境监测的手段,对比美丽乡村实施前后桃溪流域污染源强及水质环境的变化,分析美丽乡村建设在流域治理方面的贡献,为美丽乡村建设在推动流域治理方面的作用研究提供重要的理论依据。In recent years, China is implementing a beautiful village building in the watershed coastal villages from economic, social, ecological and harmony between man and nature and other aspects. It is not only speed up rural infrastrueture construc- tion, and promote development of rural ecological agriculture, but also greatly increased rural ecological environment manage- ment efforts, and played a certain indirect role in promoting the basin management. Based on the beautiful countryside construc- tion of Yongchun county in Taoxi River Basin, Fujian province, changes of rural production and lifestyle before and after the im- plementation of beautiful villages and changes of residents＇ water environment protection consciousness were investigated. Combining with means of water environment monitoring, contribution of beautiful village construction in the basin management was analyzed, and an important theoretical basis for study of role of beautiful countryside in promoting management of river basin was provided

歴史的資源保存地域における観光マネジメントの課題ー白川郷・石見銀山・有松を例としてー

本稿では、白川郷、石見銀山、有松の3つの地域をとりあげ、地域特性に応じた観光マネジメントの課題を明らかにする。これら３地域はともに重要伝統的建造物群保存地区に選定された歴史的資源を観光化することによって維持し、「その中で日常的な暮らしを営み続けている人々」を中心とした「生活と観光のバランス」の取り方における問題に直面している。また、行政区域としては、単独村、地方都市、大都市とそれぞれ位置付けが異なるため、課題の現れ方、解決の仕方としての観光マネジメントの相違点が見えやすく、比較対象のための好事例を提供できると思われる

非酒精性脂肪性肝病无创性诊断方程的构建

目的利用与非酒精性脂肪性肝病(NAFLD)相关的常用临床及实验室指标,构建无创性诊断方程,并评估该方程对NAFLD的预测及诊断价值。方法选取2016年11月-2017年11月西安医学院第一附属医院诊断为NAFLD患者127例和健康对照者30例,记录研究对象的性别、年龄、BMI、病史、ALT、AST、GGT、尿素氮(BUN)、尿酸(UA)、血肌酐(Cr)、TC、TG、HDL、LDL、糖化血红蛋白(HBA1c)、游离脂肪酸(FFA)、空腹血糖(FPG)、空腹胰岛素(FINS)、PLT、超声检查结果和Fibro Scan的检查结果等数据。计量资料组间比较采用t检验,相关性使用Pearson相关性分析,回归方程的构建使用多元线性回归方程模型,构建受试者工作特征曲线(ROC曲线),计算回归方程的敏感度和特异度。结果与脂肪肝相关的指标包括BMI(r=0.308,P=0.005)、ALT(r=0.379,P<0.001)、AST(r=0.318,P=0.004)、GGT(r=0.293,P=0.009)、UA(r=0.244,P=0.033)、FFA(r=0.249,P=0.030);对Fibroscan的受控衰减参数(CAP)相关指标进行多重回归分析,CAP的回归模型具有统计学意义(F=11.113,P<0.001),其校正决定系数R2=0.274,说明回归引起的变异在总变异中所占的比率为27.4%,对CAP影响最大的指标是ALT(β=0.358,P=0.001),其次是BMI(β=0.258,P=0.012<0.05),构建的回归方程为CAP=113.163+0.252×ALT+6.316×BMI,诊断方程的ROC曲线下面积为0.927,灵敏度为87.68%,特异度为90.00%,cut-off值为277.67,P<0.001,具有较高的诊断效能。结论与目前已有的诊断方程相比,此方程的ROC曲线下面积、特异度、灵敏度均较佳,计算方法最为简单,实用性及可操作性强,有利于便捷筛查出早期NAFLD,提高自我干预意识,进一步降低NAFLD的全球危害和疾病进程。可以作为一个诊断NAFLD的方程,供临床参考及推广。陕西省普通高等学校优势学科建设项目(陕教位[2014]3号文件

Treatment of algae bloom water using ·OH based on conventional drinking water process

我国水体的富营养化日益严重,水源地出现季节性藻类爆发现象,严重威胁饮用水安全。以厦门市莲坂水厂各工艺段出水为研究对象,采用大气压强电离放电产生羟; 基自由基(·OH),分别对水源水、混凝沉淀出水、砂滤出水进行处理,处理时间为4.5 s。当注入总氧化剂浓度为1.8 mg·; L~(-1)时,高藻浓度从25.3*10~4 cells · mL~(-1)降到800 cells ·; mL~(-1);对混凝沉淀出水注入总氧化剂0.6 mg· L~(-1)、砂滤出水注入0.2 mg·; L~(-1)时,藻细胞都未检出;·OH处理后CODMn、TOC及UV254均有明显降低,砂滤出水三卤甲烷小于8; mug·L~(-1);检测的各项指标均达到国家《生活饮用水卫生标准》(GB; 5479-2006)。因此,·OH可快速有效安全地杀灭高藻,为我国高藻水源地饮用水卫生安全保障提供技术支撑。Due to the increasing eutrophication in China, harmful algae blooms; often occur in water body periodically, which poses serious threats to; drinking water safety. Using a strong ionization discharge technology at; atmosphere pressure, ·OH was used to remove algae bloom. Other; conventional process such as coagulation, sedimentation and sand; filtration were applied respectively in the Lianban Water Plant in; Xiamen (China). The total reaction time required in the three water; processes was only 4.5 s. When the total reactive oxidant (TRO); concentration injected to algae bloom water was 1.8 mg·L~(-1), the algae; content was decreased by ·OH from 25.3*10~4 cells·mL~(-1) to 800; cells·mL~(-1). When the TRO that was injected into coagulation,; sedimentation and sand filtration water achieved 0.6 mg·L~(-1) and 0.2; mg·L~(-1), respectively, the algae contents were not detected (ND) in; treated effluents. At the same time, water quality in CODMn, TOC and; UV254 were decreased and the disinfection by-products(DBPs) such as,; trihalomethanes (THMs) concentration was lower than 8 mug·L~(-1) in; treated effluents. The treated effluent, resulting from this technology,; met the requirement of the National Drinking Water Standards (GB; 5479-2006). Therefore, ·OH was effective and safe to remove freshwater; algae without further treatment being required.国家科技支撑计划项目; 国家重大科研仪器研制项目; 科技部创新人才推进计划重点领域创新团

A DDA Calculation on the Optical Properties of Silver Nanorods

【中文文摘】利用离散偶极近似 (Discretedipoleapproximation ,简称DDA)的方法 ,从理论上对粒子的形状、尺寸及周围介质等因素对银纳米粒子 ,特别是银纳米棒的光学性质的影响进行了较系统的研究 .计算表明 ,置于空气中的棒状银纳米粒子的光学性质与其形状密切相关 ,纵向表面等离子体共振吸收峰的位置随纳米棒长径比的增加呈现线性红移关系 .给出了空气中银纳米棒纵向表面等离子体共振吸收峰的位置随长径比变化的DDA拟合公式 .如果将金属纳米粒子置于折射率更高的介电环境中 ,其纵向等离子体共振吸收峰的位置进一步呈现线性红移关系 .合成的银纳米粒子的TEM图像及相关的UV VIS消光光谱显示DDA计算结果与实验值相当一致 .DDA算法与Mie′s理论在计算球状银纳米粒子的消光系数时给出很接近的结果 ,这表明用DDA的方法来分析银的光学性质是准确可靠的 ;而DDA算法对银纳米棒消光特性的成功拟合则表明 ,该算法相对Gans′理论而言 ,在研究纳米粒子的光学性质时具有更广的适用性及更高的准确性 . 【英文文摘】The optical properties of metal nanoparticles are quite different from those of the bulk materials mainly due to the collective oscillations of their conduction electrons known as the surface plasmon resonance (SPR), which is strongly dependent on the particle shape and size, and the dielectric properties of the local environment where the nanoparticles are embedded in. Based on the discrete dipole approximation (DDA) method, we studied the optical properties of silver nanorods with different aspect ratios ...Project supported by the National Natural Science Foundation of China (2 0 2 2 80 2 0,2 0 0 2 10 0 2

The Size and Shape Effects on the Optical Properties of Gold Nanoparticles

【中文文摘】纳米尺度的金属及半导体呈现出特殊的光学、电学及磁学性质,采用近年发展起来的离散偶极近似(DDA)的方法,我们分析了金纳米粒子的尺寸及形状对其光学性质的影响。粒子周围介质的影响在文中亦作了分析。计算结果显示,金纳米粒子的等离子体吸收带同时受到粒子尺寸和形状的影响,但来自形状的影响更为明显。与米氏理论及扩展的甘氏理论相比较,DDA方法在粒子尺寸不再远小于入射光波长的时候更准确,并能应用于任何形状的纳米粒子。理论计算与实验结果能较好的吻合。 【英文文摘】Metals and semiconductors exhibit unusual optical, electronic, and magnetic properties at the nanometer scale. Based on the newly developed method, discrete dipole approximation (DDA), the dependence of the optical properties of the gold nanoparticles on the size and shape was analyzed. The effects of the surrounding medium were also taken into consideration in the calculation. The calculated results show that the plasmon absorption band depends on both the size and shape of the gold noanoparticles. However , the influence of the shape is more significant . Compared to the Mieps theory and the extension , Gansp theory , the DDA method is more accurate when the dimensions of the particles are not much smaller than the wavelength of the incident light and can be applied to particles of any shape. The theoretical results are in good agreement with the experimental data.国家自然科学基金项目,批准号为 :20003008,2983306

あんげろす第67号

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The Investment of Chinese Sovereign Wealth Funds:Based on the Perspective of Global Asset Allocation

截至2011年底,我国外汇储备存量达到3.18万亿美元。要提高外汇储备投资收益,如何在全球范围内进行资产配置是值得研究和思考的问题。本文以现代投资组合理论为基础,选用10个世界主要国家或地区的证券市场指数,研究了时间跨度在1996年1月1日-2012年1月10日期间这些指数之间的相关性;在此基础上,结合我国战略发展目标,构建了中国主权财富基金投资模拟资产池,构建了最优投资组合。结果表明,在充分考虑资产的分散化和收益性的条件下,我国主权财富基金最优投资组合占比由大到小应分别为日经225指数、标普500指数、原油、美国国债和黄金。In the end of 2011,China’s foreign exchange reserves reached US$ 3.18 trillion.Therefore,it became more essential to improve the investment return on foreign exchange reserves and the first thing worth to think was the asset allocation globally.This paper,which was based on Modern Portfolio Theory,collected the Stock Market Index of ten major countries and regions and analyzed the correlation between the indices from January 1,1996 to January 10,2012.On this basis,combined with China’s strategic development goals,this paper structured a Sovereign Wealth Fund Simulation Pool for China and gained an optimal portfolio.The results showed that,under the full consideration of decentralized assets and profitable conditions,the best China’s SWF investment portfolio in descending order was as followed: the Nikkei 225 Index,Standard & Poor’s 500 Index,crude oil,U.S.Treasury bonds and gold.教育部哲学社会科学研究重大课题攻关项目“我国外汇储备的科学管理及运用战略问题研究”(项目编号12JZD027)的阶段性研究成果;中央高校基本科研业务费专项资金资助(项目编号2010221052