自动跟踪动压平衡烟尘采样仪的研制

ＧＭ１００Ｃ动压平衡自动跟踪烟尘采样仪,跟踪精度高,响应时间快,无需换孔板,只要拨动波段开关就可换采样嘴。     

Application of decision tools to ethical analysis in biodiversity conservation

Achieving ethically responsible decisions is crucial for the success of biodiversity conservation projects. We adapted the ethical matrix, decision tree, and Bateson's cube to assist in the ethical analysis of complex conservation scenarios by structuring these tools so that they can implement the different value dimensions (environmental, social, and animal welfare) involved in conservation ethics. We then applied them to a case study relative to the decision-making process regarding whether or not to continue collecting biomaterial on the oldest of the two remaining northern white rhinoceroses (Ceratotherium simum cottoni), a functionally extinct subspecies of the white rhinoceros. We used the ethical matrix to gather ethical pros and cons and as a starting point for a participatory approach to ethical decision-making. We used decision trees to compare the different options at stake on the basis of a set of ethical desiderata. We used Bateson's cube to establish a threshold of ethical acceptability and model the results of a simple survey. The application of these tools proved to be pivotal in structuring the decision-making process and in helping reach a shared, reasoned, and transparent decision on the best option from an ethical point of view among those available.     

一种基于混沌和魔方的数字图像置乱算法

在现有数字图像置乱算法的基础上,分别分析了这些算法存在的不足,详细介绍了混沌序列及其优点。在介绍魔方玩法的基础上,指出可以把对魔方的初始置乱理解成加密过程,并分析魔方的加密原理在数字图像置乱中应用的可能性。并设计了一种结合混沌和魔方优点的数字图像置乱算法。该方法将图像的行列和对角线定义成魔方变换的旋转面,将对魔方的旋转定义成旋转面的循环移动。置乱过程先根据密钥产生混沌序列,再由混沌序列控制魔方变换进行图像置乱。通过与其他算法的实验对比,表明该算法有较好的图像置乱效果,达到了对图像进行置乱的目的。分析表明,该算法的时间复杂度较低,安全性较高,满足实际的应用需要。     

基于方向图的天线分类模型的分析与研究

文章重点考察不同天线在远区场同一接收阵列处的场强大小之间的不同关系特征,并利用神经网络对不同天线的这种非线性特征进行模拟,从而实现基于天线方向图对不同天线的分类,并对不同分类模型进行对比。     

Effects of oxygen and water content on microbial distribution in the polyurethane foam cubes of a biofilter for SO2 removal

The performance of a biofilter for off-gas treatment relies on the activity of microorganisms and adequate O_2 and H_2O. In present study, a microelectrode was applied to analyze O_2 in polyurethane foam cubes(PUFCs) packed in a biofilter for SO_2 removal. The O_2 distribution varied with the density and water-containing rate(WCR) of PUFCs. The O_2 concentration dropped sharply from 10.2 to 0.8 mg/L from the surface to the center of a PUFC with 97.20%of WCR. The PUFCs with high WCR presented aerobic–anoxic–aerobic areas.Three-dimensional simulated images demonstrated that the structure of PUFCs with high WCR consisted of an aerobic "shell" and an anoxic "core", with high-density PUFCs featuring a larger anoxic area than low-density PUFCs. Moreover, the H_2O distribution in the PUFC was uneven and affected the O_2 concentration. Whereas aerobic bacteria were observed in the PUFC surface, facultative anaerobic microorganisms were found at the PUFC core, where the O_2 concentration was relatively low. O_2 and H_2O distributions differed in the PUFCs, and the distribution of microorganisms varied accordingly.     

特丁硫磷原药生产废水的治理

针对特丁硫磷原药生产废水特点，提出了采用萃取-氧化-铝盐沉降法治理方案．并进行效益分析，结果表明，该治理方案具有良好的经济效益，社会效益和环境效益。