岩石变形破裂过程中电荷感应信号的检测

设计了采用非接触方式、高放大倍数、高效率的电荷传感器,并给出了电荷传感器的设计原理和技术指标。利用研制的电荷传感器对岩石变形破裂过程中产生的电荷感应信号进行了检测试验。结果表明,岩石在变形破裂过程中会产生电荷感应信号,并能够被研制的电荷传感器检测到;电荷感应信号是瞬时脉冲的;随着加载应力水平的增加,电荷感应信号强度增强,在峰值应力前,电荷感应信号强度达到最大值;在破裂面接收到的电荷感应信号较强,主破裂面接收到的信号最强,因而电荷的产生和岩石的破裂有很大的关系。作为正在探索的检测岩石破坏过程的手段之一,电荷感应方法应是一种很具潜力的方法,值得深入研究。     

一种抗菌生物防护口罩的研制

具有抗菌功能的生物防护口罩对于预防呼吸道传染病的流行、保护人员健康具有重要的意义。本文采用化学键结合的方法将生物抗菌剂ε-聚赖氨酸(ε-PL)固定在聚对苯二甲酸乙二酯(PET)非织造布上并与其它过滤材料复合,采用密合拱型结构设计研制出一种具有抗菌功能的生物防护口罩。实验结果表明,该口罩对菌悬液和微生物气溶胶的抗菌率分别为99.99%和81.9%,且抗菌性能稳定;对颗粒气溶胶和微生物气溶胶的过滤效率分别为99.32%和99.99%,在满足GB19083的基础上具有优良的生物防护性能。     

建筑物安全性评定体系的研究

现有建筑物是一个复杂的系统,具有诸多不同于拟建建筑物的特点,其安全性评定要涉及许多特殊的问题。首先阐述建筑物安全性评定的基本内容,其次建立建筑物安全性评定体系,对承重系统中的上部结构和地基基础的安全性评价体系进行深入讨论。     

膨润土改性工艺条件对吸附废水中TNT的影响

采用十六烷基三甲基溴化铵(CTMAB)对膨润土改性,制备有机膨润土。研究了改性条件如CTMAB的浓度、温度、振荡频率、振荡时间和pH值对废水中TNT吸附的影响。结果表明,CTMAB的质量分数为2%、温度为60℃、振荡频率为120 r/min、振荡时间2 h、pH值为中性时,改性膨润土吸附TNT的效果最好,去除率达到98%。     

Effect of SiO2 addition on NH4HSO4 decomposition and SO2 poisoning over V2O5–MoO3/TiO2–CeO2 catalyst

The deposition of NH₄HSO₄ and the poisoning effect of SO₂ on SCR catalyst are the main obstacles that restrict the industrial application of CeO₂-doped SCR catalysts. In this work, deposited NH₄HSO₄ decomposition behavior and SO₂ poisoning over V₂O₅–MoO₃/TiO₂ catalysts modified with CeO₂ and SiO₂ were investigated. By the means of characterization analysis, it was found that the addition of SiO₂ into VMo/Ti–Ce had an impact on the interaction existed between catalyst surface atoms and NH₄HSO₄. Temperature-programmed methods and in situ diffused reflectance infrared Fourier transform spectroscopy (DRIFTS) experiments indicated that the doping of SiO₂ promoted the decomposition of deposited NH₄HSO₄ on VMo/Ti–Ce catalyst surface by reducing the thermal stability of NH₄HSO₄ and enhancing the NH₄HSO₄ reactivity with NO in low temperature. And this improvement may be the reason for the better catalytic activity than VMo/Ti–Ce in the case of NH₄HSO₄ deposition. Accompanied with cerium sulfate species generated over catalyst surface, the conversion of SO₂ to SO₃ was inhibited in SiCe mixed catalyst. The addition of SiO₂ could promote the decomposition of cerium sulfate, which may be a potential strategy to enhance the resistance of SO₂ poisoning over CeO₂-modifed catalysts.     

Plug-in electric vehicles in China and the USA: a technology and market comparison

Mitigation and Adaptation Strategies for Global Change - As the top two plug-in electric vehicle (PEV) markets in the world, China and the United States of  America (USA) have developed...     

絮凝—电气浮法处理屠宰废水的研究

本文叙述了采用聚硫酸铁絮凝预处理和电气浮法处理屠宰废水的研究。探讨了絮凝剂加入量,PH值,搅拌时间,搅拌强度;沉降时间对絮凝效果的影响;探讨了气浮电压,气浮时间,电流密度,絮凝剂加入量对电气浮效果的影响;试验结果表明,COD去除率可达90%以上。经本法处理后之屠宰废水达到了四川省污染物排放标准中一类水域甲级的水平。     

优化产业结构,加速发展经济──对保康县“四大产业”措施的分析

根据保康县提出的四大经济产业开发措施，本文分析了四大产业开发的背景、意义和原则．     

清镇市区空气质量评价与污染防治对策

从典型工业污染源、市区扬尘来源、燃料燃烧、机动车尾气等方面对清镇市市区大气污染成因进行分析，特别是采用ADMS模型对清镇市主城区周边7家典型工业污染源进行研究，最后，从工业布局、能源结构、工程治理、尾气控制方面提出相应的防治对策。     

Review on the applications of Tropospheric Emissions Spectrometer to air-quality research: Perspectives for China

The Tropospheric Emissions Spectrometer (TES) aboard the National Aeronautics and Space Administration’s (NASA’s) Aura satellite launched in July 2004 is the first satellite instrument to provide simultaneous retrievals of ozone (O₃) and carbon monoxide (CO) throughout the Earth’s lower atmosphere. This paper briefly reviews the TES instrument, the retrieval of O₃ and CO profiles, and the validation of the retrievals. The applications of TES O₃ and CO products include mapping the vertical and horizontal distribution of tropospheric O₃ and CO and their correlations, examining the regional and continental outflow, and analyzing the variability of the two species associated with certain weather and climatic conditions, such as El Ni?o and the Asian monsoon. TES retrievals of O₃ and CO offer an important new source of satellite data over China with good spatial and temporal coverage that can provide evaluation and constraints on the performance of chemical transport models in simulating the general features of ozone pollution over China. Special observations have been conducted and requests may be submitted to the TES team to make geographically focused observations of O₃ and CO over China.