“三软”煤层注水封孔技术的试验研究

在分析“三软”煤层封孔特性的基础上 ,选择了合适的封孔方法 ,试验研究了Bimbar1型封孔器封孔技术 ,并对封孔器应用中的问题进行了讨论 ,设计了一种与之配套使用的单向自动截止阀 ,成功地实现了“三软”煤层注水封孔 ,可供类似条件的煤层实施该技术参考。     

烟气脱硝装置臭氧腐蚀性安全评估

根据烟气脱硝装置工艺特点,利用臭氧腐蚀性测试装置,开展了金属材质的腐蚀性研究。通过扫面电镜对不同材质腐蚀前后的表面形貌进行表征,确定了臭氧对不同材质的腐蚀特性,通过理论计算确定了臭氧分解的绝热温升。结合脱硝装置工艺特点对氧气管道流速控制方面进行了分析和总结,根据分析结果给出了建议。     

震前电磁波前兆观测研究

本文利用电磁波观测台的实测资料,对宁蒗Ms5.1级、会泽Ms4.4级地震前电磁波异常信号特征、干扰排除、异常判别进行研究,分析了震前电磁波信号图象和异常时空特征,得出电磁波主信号异常出现在主震前20天左右的结论。     

电除尘器末端微细粉尘收集装置研究

电除尘器末端是针对二次扬尘超细粉尘颗粒的收集的最后一道屏障。通过分析前人在此方面开展研究的技术成果基础上,集成多项技术,探索一条经济性较高的电除尘器增容提效改造的途径。     

Effects of traffic noise on tree frog stress levels,immunity, and color signaling

During the last decade, many studies have focused on the detrimental effects of noise pollution on acoustic communication. Surprisingly, although it is known that noise exposure strongly influences health in humans, studies on wildlife remain scarce. In order to gain insight into the consequences of traffic noise exposure, we experimentally manipulated traffic noise exposure as well as the endocrine status of animals to investigate physiological and phenotypic consequences of noise pollution in an anuran species. We showed that noise exposure increased stress hormone level and induced an immunosuppressive effect. In addition, both traffic noise exposure and stress hormone application negatively impacted H. arborea vocal sac coloration. Moreover, our results suggest profound changes in sexual selection processes because the best quality males with initial attractive vocal sac coloration were the most impacted by noise. Hence, our study suggests that the recent increases in anthropogenic noise worldwide might affect a broader range of animal species than previously thought, because of alteration of visual signals and immunity. Generalizing these results to other taxa is crucial for the conservation of biodiversity in an increasingly noisy world.     

防雷接地装置腐蚀影响因素的层次分析法

防雷接地装置是保证防雷系统正常运行的基础,然而,它不可避免会受到土壤的腐蚀。首先对防雷接地装置腐蚀机理进行了论述;其次通过整理、分析文献资料,合理选取影响防雷接地装置腐蚀的主要因素;然后根据腐蚀因素参与腐蚀的程度,构建层次分析模型,利用模型对腐蚀因素进行定量分析,界定出影响因素对防雷接地装置腐蚀影响的权重值;最后对腐蚀因素进行综合排序。研究表明,影响防雷接地装置腐蚀的最主要因素为pH值、土壤电阻率和含水量,这为制定经济合理、安全可靠的防雷接地装置腐蚀防护措施提供了科学依据,具有实际工程应用价值。     

The input efficiency of chord keyboards

This study focused on an innovative mobile input device model that integrated ergonomic design principles to create a chord keyboard for use in concert with pointing devices. We conducted usability tests to demonstrate the operating performances of such keyboards using keys with four characters per key. Twelve right-handed subjects between the ages of 20 and 30 years and with no wrist disability participated in the usability tests. We analyzed the resulting data to compare the differences among the means. The results indicated that keyboards with multiple characters per key created some confusion among users but that keys with multiple characters per key nonetheless resulted in better input performance.     

基于STM32F103RBT6的振动信号采集系统

对一种监测振动信号采集系统进行了设计,系统以STM32F106RBT6型单片机为设计核心,并对传感器供电电路,信号调理电路,AD转换模块,通讯模块进行了分析。通过MATLAB对傅里叶变换进行了设计,对一些模拟信号进行了实测分析,实现了高精度模拟数据采集,可用于振动信号的采集,该振动信号采集系统具有功能强大,成本低,高精度,体积小等优点。