东亚高空大气气溶胶的分布及沙尘输送特征研究

利用长达20 年的SAGEⅡ(stratospheric aerosol and gas experimentⅡ) 资料, 研究了东亚地区5.0 ～15.0 km 高空气溶胶多年时空分布特征和变化趋势, 并研究了东亚沙尘活动对高空及下游的气溶胶输送。发现东亚高空气溶胶水平分布呈现上中下3 层不同的分布特征, 下层 5. 0 ～8. 5 km 高值区对应气溶胶源区青藏高原和西北沙漠地区;中层 9. 0 ～10. 0 km 高值区对应温带气旋高发的中纬度地区;上层 10. 5 ～15. 0 km 表现为低纬气溶胶含量显著高于高纬地区。高空各层气溶胶的空间分布受天气系统的影响具有明显的季节变化。近10 年来东亚高空气溶胶呈减少趋势, 平均光学厚度约下降了0. 016。另外还发现沙尘活动与 5. 0 ～11. 5 km 范围内的气溶胶显著相关, 反映沙尘活动影响的高度范围可以达到整个对流层。定义沙尘暴高空影响指数, 用来分析东亚沙尘暴对下游地区的影响, 发现随着时间推移沙尘逐渐向东移动, 在约 12 天之后可以到达大西洋。     

炮制对白花丹参饮片中丹参酮ⅡA和丹酚酸B的影响

为了确定不同白花丹参饮片中丹参酮ⅡA和丹酚酸B的含量,本实验应用高效液相色谱进行测定。采用色谱柱（150mm×4．6mm,51μm）;检测波长丹参酮ⅡA为270nm,丹酚酸B为286nm;流动相：丹参酮ⅡA采用乙腈-水（74：26）,丹酚酸B采用甲醇-乙腈-甲酸-水（30：10：1：59）的条件。结果表明,白花丹参不同炮制品中丹参酮ⅡA含量高低为：原药材〉生品饮片〉米炒品〉酒制品,丹酚酸B含量高低为：原药材〉生品〉酒制品〉米炒品。说明不同炮制方法对白花丹参中丹参酮ⅡA和丹酚酸B的含量有一定的影响。     

嵌入式四轴运动控制器的设计

为了解决传统基于PC平台的运动控制器渐显高能耗、高成本、低可靠性等缺点,结合ARM和DSP运动控制芯片特点,给出一种基于ARM微处理器LPC1788和专用DSP运动控制芯片PCL6045BL组合的嵌入式四轴运动控制器。该控制器在硬件上采用ARM+DSP的主从式双CPU结构,并结合ARM在人机界面显示、通信接口方面的优势以及PCL6045BL高控制精度的优点,在软件上通过LPC1788上移植μC/OS-Ⅱ实时操作系统来管理总体的运动控制系统。最后通过圆弧插补实验验证了嵌入式四轴运动控制器具有可靠性高和快速响应等优点。     

Recovery Properties of Polysulfone Hollow Fiber Chelating Membrane Modified with Thiourea for Mercury ( Ⅱ )

The adsorption isotherms of the polysulfone hollow fiber chelating membrane modified with thiourea as chelating groups for Hg2 were determined. The effects of mobile phase conditions and the operating parameters on removal performance of the chelating membrane for Hg2 were also investigated. The recovery of Hg2 decreased at low pH and the optimum range of pH was from 6 to 7. The feed concentration effected on recovery of Hg2 at the specified loading amount of Hg2 . The Hg2 could be removed from different concentration feed solution by chelating membrane. The increase of feed flow rate led to slight decrease of recovery of Hg2 at the specified loading amount of Hg2 . The chelating membrane could be operated at height feed flow rate and a large-scale removal of Hg2 could be realized. With the increase of load amount, Hg2 recovery decreased, but the saturation degree of chelating membrane increased. According to required recovery of Hg2 and the saturation degree of chelating membrane, the optimum loading amount of Hg2 should be selected in the actual removal of Hg2 .     

牛初乳中IGF和TGF的分离与纯化

采用葡聚糖凝胶G - 75层析色谱、SPSepharoseFF离子交换色谱和制备型疏水作用色谱Oc tylSepharoseFF研究了IGF -Ⅰ ,IGF -Ⅱ和TGF - β的分离纯化 ,并且用高效液相色谱法对IGF -Ⅰ ,IGF -Ⅱ和TGF - β的含量进行了测定 .     

不透明度对Ⅱ型超新星光变曲线的影响

本文考虑了各种过程对不透明度的贡献,并把不透明度写成参量形式,利用热力学定律和扩散方程得到了Ⅱ型超新星光极大后光变曲线解析解的普遍表达式。进而讨论了各种不透明度对超新星光变曲线的影响,采用我们的方法比较好地解释了超新星的一些观测特性,并拟合了两颗SNⅡ—L观测光变曲线     

胰岛素联合口服药二甲双胍治疗2型糖尿病的临床观察

目的：观察早、晚皮下注射预混胰岛素联合口服二甲双胍治疗2型糖尿病的临床效果．方法：对60例早、晚注射预混胰岛素治疗效果欠佳的2型糖尿病患者加用口服降糖药,分别测定治疗3个月前后的空腹血糖（FPG）、餐后2小时血糖（2hPG）、糖化血红蛋白（HbAlc）、空腹C肽、餐后2小时C肽、血脂、体重、血压．结果：加用口服药治疗后患者的空腹血糖、餐后2小时血糖、糖化血红蛋白、体重指数较治疗前明显下降（P〈0．01）,餐后2小时C肽较治疗前明显升高,其差异有显著性（P〈0．01）,而对血压、血脂影响不大．结论：对单用胰岛素治疗效果欠佳的2型糖尿病联合应用二甲双胍治疗效果显著．     

利用ILASⅡ进行采访数据的有效控制

编目数据的质量直接影响读者检索、借阅图书的速度及准确率。探讨了如何利用ILASⅡ提供的功能模块对编目数据进行有效控制和利用。     

Multiobjective optimization of morphologies and performance of Q355C gas metal arc welding based on the NSGA-Ⅱ

This work studied the influence law of gas-metal-arc welding process parameters on the morphologies and performance to improve the morphologies and performance. The mixed orthogonal surfacing test was carried out by taking the preheating temperature, welding voltage, current, speed, and wire extension as GMAW process parameters. The aspect ratio decreased with increasing welding voltage, and it first increased and then decreased with increasing welding current. The hardness increased with increasing preheating temperature and welding speed and decreased with increasing welding voltage, current, and wire extension. Residual stress increased with the increased preheating temperature. In addition, it first decreased and then increased with increasing welding voltage and speed. Based on the regression model, the nondominated sorting genetic algorithm II (NSGA-II) was used for multiobjective optimization. After that, experiments were conducted to verify the noninferior solutions among the aspect ratio, hardness, and residual stress. Errors between the predicted and experimental results by the three output indices were all less than 10%, indicating the feasibility of the optimization method. The research results provide a theoretical direction for multiobjective optimization and refined applications of arc welding.     

硫氰酸钴络阴离子与结晶紫水溶液分光光度法测定钴的研究

在0．03mol·L－1的盐酸介质中,当有非离子表面活性剂tritonX-100存在时,硫氰酸钴络阴离子与结晶紫能生成可溶于水的三元离子缔合物,我们研究了缔合物生成的条件,测定了缔合物的组成。标准曲线表明,表观摩尔吸光系数为1．1×104L·mol－1·Cm－1。Co（Ⅱ）在0～3μg·mL－1范围内服从比耳定律,本法回收率为96．7～104．3％。