中药废水高效生物处理技术生产性试验研究

采用CSTR产酸发酵反应罐-UASBAF复合厌氧反应池-CAR交叉流好氧反应池这一高效生物处理工艺治理了哈尔滨中药二厂的生产废水，并进行了生产性试验研究，结果表明，此工艺可以有效地处理该厂高浓度难降解有机中药废水，在进水浓度为7000-40000mg／L时，COD总去除率可达99％以上，出水可以达到松花江水系排放标准。     

服装样板一片袖三维基本模型的建立及应用

该三维模型是依据常用的一片袖形式设计建立的，它包含了一片袖的共性特征结构要素．不拘泥于有限的、已有的服装样板设计，可自由选择确定三维一片袖向二维样板转化的剪切位置，是自动生成工业服装样板系统研究的基础．     

Properties of PbLa（Zr,Sn, Ti）O3 ceramics near ferroelectric-antiferroelectric phase boundary

Shirane found in the middle of the 20th century that the solid solution PZT had a lot of fine characteristics and carried out detailed researches[1]. The critical phase transition field of antiferroelectric decreased by adding titanate. Titanate expands t…     

Mechanical properties and friction behaviors of CNT/AlSi<Subscript>10</Subscript>Mg composites produced by spark plasma sintering

The mechanical properties and friction behaviors of CNT/AlSi₁₀Mg composites produced by spark plasma sintering (SPS) were investigated. The results showed that the densities of the sintered composites gradually increased with increasing sintering temperature and that the highest microhardness and compressive strength were achieved in the specimen sintered at 450℃. CNTs dispersed uniformly in the AlSi₁₀Mg matrix when the addition of CNTs was less than 1.5wt%. However, when the addition of CNTs exceeded 1.5wt%, the aggregation of CNTs was clearly observed. Moreover, the mechanical properties (including the densities, compressive strength, and microhardness) of the composites changed with CNT content and reached a maximum value when the CNT content was 1.5wt%. Meanwhile, the minimum average friction coefficient and wear rate of the CNT/AlSi₁₀Mg composites were obtained with 1.0wt% CNTs.     

Rapid solidification of acoustically levitated Al-Cu-Si eutectic alloy under laser irradiation

Al-27%Cu-5.3%Si ternary eutectic alloy was melted using a YAG laser and then solidified while being acoustically levitated. A maximum undercooling to 195 K (0.24 TL) was achieved with a cooling rate of 76 K/s. The solidification microstructure was composed of (Al+θ+Si) ternary eutectics and (Al+θ) pseudobinary eutectics. During acoustic levitation, the (Al+θ+Si) ternary eutectics are refined and the (Al+θ) pseudobinary eutectics have morphological diversity. On the surface of the alloys, surface oscillations and acoustic streaming promote the nucleation of the three eutectic phases and expedite the cooling process. This results in the refinement of the ternary eutectic microstructure. During experiments, the reflector decreases with increasing alloy temperature, and the levitation distance always exceeds the resonant distance. Because of the acoustic radiation pressure, the melted alloy was flattened, and deformation increases with increasing sound pressure. The maximum aspect ratio achieved was 6.64, corresponding to a sound pressure of 1.8×104 Pa.     

微波辅助下联二萘酚酰胺催化剂在Biginelli反应中的应用

以合成联二萘酚酰胺类物质为催化剂,微波条件下对Biginelli反应进行研究;在乙醇作为溶剂,芳香醛、尿素和乙酰乙酸乙酯的摩尔比为1.2∶1.0∶1.0,催化剂1a的用量为15%mmol,反应温度60℃,微波加热25 min的条件下,化合物产率可最高达88%。此反应具有催化剂经济易得及用量少、反应条件温和、环境友好和操作简便等优点。     

液体表面张力系数实验装置的改进

针对FD-NST-I型液体表面张力系数测量仪在实验中存在的定标不准确、吊环水平度不易掌握、升降台行程小且操作中容易使液面发生抖动的不足提出了一系列改进措施。定标过程中用线状砝码依次钩挂代替原有的在托盘中放入片状砝码的方法;在传感器装置盒上安放水平泡;在吊环上安放水平泡来检验吊环是否水平;用虹吸管排水的方法降低容器中的液位来代替升降台,不仅使液位的下降形成显著提高,而且控制虹吸管中液体流动速度可以避免液面抖动。改进后实验测量的精度得到提高。     

Characteristics and realization of the second generation surface acoustic wave’s wavelet device

1.INTRODUCTIONDue to the process and characteristics of the non-stationary signals both in ti me and frequency do-mains,wavelet technology has been widely em-ployedin scientific research and engineering appli-cation fields[1~3].To date,wavelet algorithmthatneeds a larger number of mathematic operationsand complicated program is mainly realized bycomputer,whichis quite difficult and expensive toapplyit to engineeringfields and portable electron-ic systems.To solve these problems,we proposed…     

早熟西瓜优种——郑杂5号

郑杂5号西瓜,以早熟、丰产、品质好而著名全国。是当前早熟型西瓜最佳品种之一。荣获1989年全国早熟西瓜品种一等奖。深受广大瓜农及消费者的欢迎。郑杂5号为杂交一代种,株势生长强健,     

Study on RS- and GIS-based ecological capital assessment in arid areas

Ecological capital assessment is currently one of the important research contents in the interdisciplinary field of ecology, resources economics, environmental economics and ecological economics. To scientifically assess ecological capital redounds to decision-makers to consider the ecological cost in economic development, and is also necessary for sustainable economic development in arid areas. Based on the theory of landscape ecology in this paper the per unit area ecological capital values in arid areas are researched by using the Landsat TM data, CBERS satellite data, meteorological data, MODIS satellite data and other ecological data, and the RS- and GIS-based models of assessing ecological capital values in arid areas are developed. Moreover, based on the field-measured data, a case study on ecological capital assessment in the Manas River basin, Xinjiang in 2003 is carried out. The basin is divided into 4 ecological capital areas so as to quantitatively calculate the ecological capital values of the ecosystems, analyze the spatial distribution of ecological capital, and chart the maps of spatial distribution of ecological capital. The results show that the total ecological capital value of the ecosystems in the Manas River basin in 2003 was 1.49454×10^11 yuan RMB. In spatial distribution, the ecological capital decreases from the alpine zones to the plains and from the oases to the deserts, which accords with the distribution of vegetation zonality in this arid area. The assessed results can objectively reflect the ecological capital and its spatial distribution in the aridbasin, and can also provide reference for roundly carrying out the assessment of ecological capital in arid areas.