墙体内热湿耦合过程分析中的传递函数解析法

以Luikov方程为基础,首次提出用传递函数分析方法研究墙体内的耦合传热传湿过程,并以玻璃纤维板为例应用该方法进行了热湿耦合过程的分析计算,得到了板内温度动态分布特性和湿积累率分布.将计算结果与实测值进行了比较.     

Experimental study of conversion from atomic high—order harmonics to x—ray emissions

There are two physical phenomena in a strong laser intensity. One is the high-order harmonic emission; the other is x-ray emission from optical-field ionized plasmas. The experiment of conversion from high-order harmonics to x-ray emissions was given with a 105fs Ti:sapphire laser by adjusting laser intensities. The ingredient in plasma was investigated by the numerical simulations.Our experimental results suggested that the free electrons have detrimental effects on harmonic generation but are favourable for x-ray emission from optical-field ionized plasmas. If we want to obtain more intense harmonic signals as a coherent light source in the soft x-ray region, we must avoid the production of free electrons in plasmas. At the same time, if we want to observe x-rays for the development of high-repetition-rate table-top soft x-ray lasers, we should strip all atoms in the plasmas to a necessary ionized stage by the optical-field-ionization in the field of a high-intensity laser pulse.     

皖南西坑Ag-Pb-Zn矿床稀土元素地球化学研究

对比研究了皖南西坑银多金属矿床中赋矿围岩蓝田组地层、成矿有关的花岗岩、矿石、矿床蚀变岩等地质体的稀土元素地球化学特征 ,借以示踪成矿物质来源。结果表明 ,西坑银多金属矿床成矿热液、成矿物质主要来源于花岗岩浆作用 ,成矿热液和富碳酸盐岩地层水岩反应使蚀变岩相对富集重稀土。     

铜络合物催化剂用于甲醇氧化羰化合成碳酸二甲酯(英文)

报道了一系列铜与含氮、氧、磷配体形成的配位催化剂用于甲醇氧化羰化合成碳酸二甲酯的研究结果。在１２０℃～１３０℃、３．０ ＭＰａ的反应条件下,氯化亚铜／联吡啶配位催化剂具有最好的活性、选择性和稳定性。在实际反应条件下的挂片试验结果表明,氯化亚铜／联吡啶催化剂对一种特种不锈钢材料的腐蚀速率为０．０２４毫米／年。     

二丁基二月桂酸锡催化碳酸二甲酯和苯酚酯交换反应研究

研究了二丁基二月桂酸锡催化碳酸二甲酯和苯酚酯交换反应的活性和选择性,发现不同厂家生产的二丁基二月桂酸锡对该反应的催化活性和选择性差异较大,采用反应分离一体化的工艺可提高苯酚的转化率。     

离子液体{[C16mim]Br}辅助CdS纳米球的制备

以CdCl2·2.5H2O和Na2S2O3为原料,在[C16mim]Br离子液体中合成了CdS纳米球(1),其结构和性能经XRD和TEM表征。考察了c{[C16mim]Br}对1形貌的影响,结果表明,通过控制c{[C16mim]Br},可制得分散性较好,粒径在50 nm～80 nm的1。     

Camera-based model to predict the total difference between effect coatings under directional illumination

A camera-based model is established to predict the total difference for samples of metallic panels with effect coatings under directional illumination,and the testing results indicate that the model can precisely predict the total difference between samples with metallic coatings with satisfactory consistency to the visual data. Due to the limited amount of testing samples,the model performance should be further developed by increasing the training and testing samples.     

固定界面子结构模态精确综合之非线性特征值问题的迭代解法

本文从模态综合过程出发，构造由于固定界面子结构模态精确综合所致非线性特征值问题的有效迭代格式。能用的Ｃｒａｉｇ固定模态综合结果成为其首次迭代近似。该方法克服了可保留模态数的限制，综合结果能达到指定精度。     

变时基技术在汽车实验模态分析中的应用

实验模态分析是了解汽车动态特性的重要工具。文中介绍了用基于变时基技术的冲击激励实验模态分析对某改装汽车进行的分析。利用分析结果,对该汽车动态设计水平进行了评价。