Polymorph control of a complex BaCO3 superstructure through the cooperation of an insoluble polylactide self-assembled film and soluble poly allylamine modifier

We have developed a novel 3D polymer template composed of a self-assembled film (SAF, insoluble polylactide film) and a soluble modifier (poly allylamine) and used this template to synthesize barium carbonate with a complex superstructure. Controlled synthesis of barium carbonate with novel morphologies such as spherical crystals consisting of needle-like building blocks, flower-like congeries consisting of one pronounced backbone and many shuttle-like petals, raft-like barium carbonate bundles consisting of tiny fractions etc., was realized by finely tuning the alignment and self-assembly of rods using the double template. The observed crystallization can proceed along the so-called rod-dumbbell-sphere formation process. This approach will be further extended to polymer-controlled fabrication of related minerals with novel, complex superstructures.     

不同介质下CrNX薄膜的摩擦学特性研究

采用电弧离子镀技术在45#钢衬底表面沉积了CrNX薄膜.用显微硬度计测试了薄膜的硬度,用X射线衍射仪分析了薄膜的相结构,用球-盘式摩擦磨损试验机评价了在不同介质条件下(干摩擦、水润滑、油润滑)CrNX薄膜的摩擦学性能,用表面轮廓仪测试了磨痕处的磨痕轮廓,用扫描电镜(SEM)观察了薄膜磨痕形貌.结果表明,相对于干摩擦,水润滑和油润滑条件下,CrNX薄膜的摩擦因数和磨痕深度都有明显降低的趋势.干摩擦条件下薄膜主要表现为磨粒磨损;水润滑条件下,主要表现为腐蚀磨损;油润滑条件下由于油膜在两摩擦表面的吸附,薄膜几乎无磨损.     

MATHEMATICAL SIMULATION OF NAVIGATION CHANNEL CHANGES IN THE FLUCTUATING BACKWATER REGION OF THE THREE GORGES RESERVOIR

In this paper,an one- and two-dimensional connected mathematical model is de-veloped.The two-dimensional characteristics of flow and sediment transport are considered asmuch as possible in the model.The model is calibrated with field data and applied to simulate theriver process of the fluctuating backwater region of the Three Gorges Reservoir.Some conclu-sions have been made based on the simulation results.     

生产高硫低硅优质硫精矿的试验研究

为了适应国际市场的需要,进行了生产高硫低硅优质硫精矿的试验,确定了磨矿细度、药剂制度和工艺流程的最佳方案。在工业性试验中取得了硫精矿品位52.28％,含SiO_20.44％的指标。     

蒸汽压的测定和研究

设计安装了一套既能用于低沸点,也适用于较高沸点物质的蒸汽压测定仪。测定了三丁胺、N-甲基苯胺以及1,2-丙二醇的蒸汽压,提供了十八种物质的Antoine常数和偏心因子值。     

Cluster analysis for occupant-behavior based electricity load patterns in buildings: A case study in Shanghai residences

In building performance simulation, occupant behavior contributes to large uncertainties, which often lead to considerable discrepancies between actual energy consumption and simulation results. This paper aims to extract occupant-behavior related electricity load patterns using classical K-means clustering approach at the initial investigation stage. Smart-metering data from a case study in Shanghai, China, was used for the load pattern analysis. The electricity load patterns of occupants were examined on a daily/weekly/seasonal basis. According to their load patterns, occupants were categorized as (a) white-collar workers, (b) poor or older families and (c) rich or young families. The daily patterns indicated that electricity use was much more random and fluctuated over a wide range. Most households of the monitored communities consumed relatively-low electricity; the characteristic double peak with higher level of consumption in the morning and evening were only apparent in a relatively small subset of residents (mostly white-collar workers). The weekly analysis found that significant load shifting towards weekend days occurred in the poor or old family group. The electricity saving potential was greatest in the white-collar workers and the rich or young family groups. This study concludes with recommendations to stakeholders utilizing our load profiling results. The research provides a rare insight into the electricity-use-related occupant behaviors of Shanghai residents through the case study of two communities. The findings of the study are also presented in a meaningful way so that they can directly aid the decision-making of governments and other stakeholders interested in energy efficiency. The research results are also relevant to the building energy simulation community as they are derived from observations, and thus can have the potential to improve the efficiency and accuracy of numerical simulation results.     

三峡左岸电站蜗壳保压保温浇筑二期混凝土技术

三峡左岸电站单机容量700MW，蜗壳二期混凝土由充水加压(1．5倍设计水头约120m)改为保温(16℃～22℃)保压(70m水头)状态下浇筑，以达到低水头运行时由钢蜗壳单独承受荷载，高水头运行时钢蜗壳与外包混凝土共同受力的目的，属国内首创。混凝土入仓采用门机、胎带机、布料机和混凝土泵等方式，座环阴角部位混凝土采用泵送方式，并在蜗壳底部与座环阴角部位预埋回填灌浆系统做补充，以确保混凝土浇筑密实。实际施工表明，座环阴角部位混凝土浇筑非常密实，回填灌浆量很小，单台机不到200kg，达到了预期目标。     

水资源的“ET管理”是不可行的

<正>ET是英文蒸发蒸腾(腾发量)的缩写,它包括陆地的植物蒸腾、土面蒸发和水面蒸发,又叫陆地蒸发,是水文循环重要组成部分。所谓"ET管理",就是以耗水量(ET)控制为基础     

朔州市农村饮水解困工程建设经验、存在问题及对策

文中总结了朔州市在农村饮水解困工程建设中的经验，论述了存在的问题并提出了相应的对策及建议。