发展以低成本和软技术为核心的江西省绿色建筑

绿色建筑将成为未来建筑的发展趋势。针对本省经济社会发展水平,江西省现阶段应以＂因地制宜＂、＂经济适用＂、＂本土科技＂为原则,大力推广以低成本和软技术为核心的绿色建筑,从而推进绿色建筑的全面发展,实现节能减排的战略目标。     

一类高次分数阶微分方程正解的存在唯一性

研究Caputo型导数下的一类高次分数阶微分方程.首先给出等价于微分方程解的积分形式,然后利用格林函数的性质和混合单调算子不动点理论证明了这类分数阶微分方程正解的存在唯一性.     

带有分数阶边界条件的一类Caputo差分方程边值问题

运用分数阶的基本定义和引理,讨论了一类带有分数阶边界条件的离散Caputo分数阶差分方程边值问题的格林函数,并给出了v=2时格林函数的几个重要性质.     

水平层状介质中瞬变波动电磁场入射波直接时域响应式

通过有源Maxwell方程对应的电磁场矢量波动方程,利用时域Green函数方法,结合电磁场边界条件,推导出线性、均匀、各向同性的水平层状介质中瞬变波动场入射波的直接时域解析公式。避免了传统偶极子假设和时频转换引起的误差,为解决全场区瞬变电磁精细探测直接时域解析问题提供了理论基础。     

Scattering wave field around a cavity with circular cross-section embedded in saturated soil using boundary element method

Based on Biot＇s theory and considering the properties of a cavity, the boundary integral equations for the numerical simulation of wave scattering around a cavity with a circular cross-section embedded in saturated soil are obtained using integral transform methods. The Cauchy type singularity of the boundary integral equation is discussed. The effectiveness of the properties of soil mass and incident field on the dynamic stress concentration and pore pressure concentration around a cavity is analyzed. Our results are in good agreement with the existing solution. The numerical results of this work show that the dynamic stress concentration and pore pressure concentration are influenced by the degree of fluid-solid coupling as well as the pore compressibility and water permeability of saturated soil. With increased degree of fluid-solid coupling, the dynamic stress concentration improves from 1.87 to 3.42 and the scattering becomes more significant. With decreased index of soil mass compressibility, the dynamic stress concentration increases and its maximum reaches 3.67. The dynamic stress concentration increases from 1.64 to 3.49 and pore pressure concentration improves from 0.18 to 0.46 with decreased water permeability of saturated soil.     

中小山水城市绿地系统塑造城市特色的途径和方法

绿地是形成城市特色的重要组成部分,城市绿地系统与城市自然人文环境相结合是城市特色构建的一个重要方面。中小山水城市绿地系统规划在塑造城市特色方面具有独特的代表性。文章总结了中小山水城市的特色,提出绿地系统塑造城市特色的手法,并且以泾县为例来分析绿地系统塑造中小山水城市特色的手法。首先分析整理城市特色资源,对主要的关键词进行抽取比较,得到主要的城市特色;然后从整体出发为绿地系统定位,通过城市绿地系统结构布局强化城市山水环境;通过绿道体系的构建打造城市特色的展示体系;最后从树种规划的角度出发塑造城市的宣纸之都的城市特色.     

顶空气相色谱法测定盐酸托泊替康中残留有机溶剂

采用顶空气相色谱法测定盐酸托泊替康中的残留有机溶剂。载气为氮气,检测器为FID,色谱柱为DB-624毛细管柱,柱温为55℃,检测器温度为250℃,进样口温度为250℃,测定盐酸托泊替康中甲醇、丙酮、乙腈、乙酸乙酯和二氧六环的残留量。结果显示5种溶剂达到完全分离,在考察的质量浓度范围内具有良好的线性关系,r均达到0.999,平均回收率为98.6%～99.9%。用所建立的分析方法测定盐酸托泊替康中的残留有机溶剂,结果准确、可靠。     

A novel hybrid MCDM approach based on fuzzy DEMATEL, fuzzy ANP and fuzzy TOPSIS to evaluate green suppliers

It is well known that “green” principles and strategies have become vital for companies as the public awareness increased against their environmental impacts. A company’s environmental performance is not only related to the company’s inner environmental efforts, but also it is affected by the suppliers’ environmental performance and image. For industries, environmentally responsible manufacturing, return flows, and related processes require green supply chain (GSC) and accompanying suppliers with environmental/green competencies. During recent years, how to determine suitable and green suppliers in the supply chain has become a key strategic consideration. Therefore this paper examines GSC management (GSCM) and GSCM capability dimensions to propose an evaluation framework for green suppliers. However, the nature of supplier selection is a complex multi-criteria problem including both quantitative and qualitative factors which may be in conflict and may also be uncertain. The identified components are integrated into a novel hybrid fuzzy multiple criteria decision making (MCDM) model combines the fuzzy Decision Making Trial and Evaluation Laboratory Model (DEMATEL), the Analytical Network Process (ANP), and Technique for Order Performance by Similarity to Ideal Solution (TOPSIS) in a fuzzy context. A case study is proposed for green supplier evaluation in a specific company, namely Ford Otosan.     

脲甲醛预聚合对酞菁绿G颜料微胶囊化的影响

从脲、甲醛的预聚反应条件入手，讨论了脲甲醛量比、反应介质的pH值、催化剂和反应温度对酞菁绿G颜料微胶囊化过程以及微胶囊结构、表面形态、粒径及其分布和包埋率的影响。实验结果表明，当脲甲醛量比为n(脲)：n(甲醛)=1：2.0，以氢氧化钠为碱性催化剂，反应介质pH值=8．0，反应温度70℃，反应时间1小时。得到的脲-甲醛预聚物水溶性好，用原位聚合法制备微胶囊时可以避免发生微胶囊表面形态呈非球形、凹陷和开裂。在以上条件下，制得了包覆结构紧密、包埋率较高、粒径分布均匀且平均粒径为3．2μm的球形固体微胶囊。     

Impedance spectroscopy study and electrical behavior of PMN-PZT actuators joined by ceramic slurry

The solid solution of Pb(Mg,Nb)O₃-Pb(Zr,TiO) O₃ materials have high piezoelectric constant of 600 ∼650 pC/N and electromechanical coupling coefficient k _p of 0.65. Due to such high piezoelectric constant and electromechanical coupling coefficient, Pb(Mg,Nb)O₃-Pb(Zr,TiO)O₃ materials have been attracted attentions for the applications of multilayer ceramic actuators. Actuators can be produced by staking piezoelectric ceramic materials and inner electrodes, alternatively. However, it is difficult to fabricate huge ceramic actuators without any serious problems during the process conditions. Because ceramic are easily cracked during the sintering process, due to strikingly different shrinkage rate between the ceramic materials and metal electrodes. In this research, new jointing methods will be proposed for huge ceramic actuators, and then their electrical properties were investigated. Time dependent leakage current and impedance spectroscopy were employed to expect device performances.