手机信令数据在地质灾害预警中的应用

本文是在地质灾害监测预警项目的实践基础上,结合移动运营商对手机信令数据的侦测应用,提出了基于手机信令数据的地质灾害预警发布的解决方案。该方案可实现地质灾害隐患点威胁区域的人员实时统计、预警信息发布、预警效果判断等功能,弥补了现有基于短信和大喇叭预警发布解决方案的不足。它能有效降低地质灾害发生时造成的人员伤亡,并且适用于我国所有的地质灾害影响区域。     

Controlled oxidation-reduction potential on dark fermentative hydrogen production from glycerol: Impacts on metabolic pathways and microbial diversity of an acidogenic sludge

The oxidation-reduction potential (ORP) is an important factor in H₂ production via dark fermentation however its effect over microbial diversity in an acidogenic sludge has not, been well studied. This work studies the effect of ORP controlled by hydrogen peroxide and potassium ferricyanide on continuous hydrogen production and microbial diversity in an acidogenic sludge fed (HRT 12 h and pH 5.5) with glycerol. Results show that the more oxidizing ORP control environment (?540 mV) improves H₂ yield by 50–70% (0.31–0.51 molH₂/mol glycerol) over non-ORP control conditions. Oxidizing ORP values were shown to enrich microorganisms of the genus Clostridium, which have been linked to high H₂ yields. Therefore, controlling ORP in an acidogenic sludge was shown to directly modify microbial diversity at the genus level, and could likely to indirectly regulate metabolic function. Additionally, metabolic pathways were regulated by the kind of agent used.     

基于静电喷雾法萝卜硫素微胶囊的制备与表征

使用静电喷雾法制备不同壁材的萝卜硫素（sulforaphane，SF）微胶囊，通过表征微胶囊表面形貌、分子间相互作用、热行为、体外释放情况以及在高温下的贮存稳定性，研究食品级聚合物对SF的微胶囊化作用，从而筛选出适合静电喷雾包封SF的壁材。结果表明，微胶囊平均粒径在427.80～1 857.04 nm之间，呈球状，表面光滑。相比壳聚糖，玉米醇溶蛋白（Zein）和明胶（gelatin，Gel）是更有效的SF递送载体，Zein-SF、Gel-SF的包封率分别为（95.83±2.37）%、（95.11±2.82）%。傅里叶变换红外光谱确认了SF微胶囊中SF的存在；热重分析结果显示SF微胶囊在300 ℃的高温下才大量降解，有较高的热稳定性。SF微胶囊在模拟胃肠液和食物基质的最终释放率在80%～90%之间，具有良好的胃肠溶解和释放性能；同时，微胶囊化处理后的SF耐热性显著提高。本研究结果有助于进一步开发SF递送载体，促进其产业化应用。     

Numerical simulation of the effect of multiple obstacles inside the tube on the spontaneous ignition of high-pressure hydrogen release

Self-ignition may occur during hydrogen storage and transportation if high-pressure hydrogen is suddenly released into the downstream pipelines, and the presence of obstacles inside the pipeline may affect the ignition mechanism of high-pressure hydrogen. In this work, the effects of multiple obstacles inside the tube on the shock wave propagation and self-ignition during high-pressure hydrogen release are investigated by numerical simulation. The RNG k-ε turbulence model, EDC combustion model, and 19-step detailed hydrogen combustion mechanism are employed. After verifying the reliability of the model with experimental data, the self-ignition process of high-pressure hydrogen release into tubes with obstacles with different locations, spacings, shapes, and blockage ratios is numerically investigated. The results show that obstacles with different locations, spacings, shapes and blockage ratios will generate reflected shock waves with different sizes and propagation trends. The closer the location of obstacles to the burst disk, the smaller the spacing, and the larger the blockage ratio will cause the greater the pressure of the reflected shock wave it produces. Compared with the tubes with rectangular-shaped, semi-circular-shaped and triangular-shaped obstacles, self-ignition is preferred to occur in tube with triangular-shaped obstacles.     

基于FPGA的高速软件无线电数字解调模块的分析

主要对载波恢复COSTAS环法中的NCO与数字滤波器进行了介绍 ,并对FPGA芯片的优缺点进行了简单的分析 ,使该模块能有效的完成载波恢复功能。     

YT-14跳汰机在选煤厂中的应用

YT - 14跳汰机是在SKT - 14跳汰机的基础上研制的新型高效、节能跳汰机。介绍了其结构优点和在徐州矿务集团公司夹河矿洗煤厂的应用情况及其可能取得的经济效益。     

纳米碳酸钙的合成方法

纳米碳酸钙的合成方法有多种，主要采用液相法，根据反应机理的不同又可将其划分为三种反应系统：Ｃａ（ＯＨ）２－Ｈ２Ｏ－ＣＯ２反应系统、Ｃａ２＋－Ｈ２Ｏ－ＣＯ３２－反应系统和Ｃａ２＋－Ｒ－ＣＯ３２－反应系统（Ｒ为有机介质），并对每种反应系统的特点、机理、控制因素等进行了分析。     

混煤燃烧过程中飞灰颗粒排放特性试验

为了解混煤燃烧对飞灰颗粒尤其是超细颗粒排放特性的影响，在一维沉降炉上对平朔、大优及神木3种烟煤及其混煤进行燃烧试验.采用激光粒度分析仪对收集的飞灰颗粒尺寸分布进行测定，并对混煤飞灰颗粒的体积平均直径及可吸入颗粒物（PM₁₀）、超细颗粒物（PM_2.5）所占比例的计算值与测量值进行比较.结果表明：合理混煤能增大飞灰颗粒的粒径，减少可吸入颗粒物（PM₁₀）及超细颗粒物（PM_2.5）的排放；混煤的飞灰颗粒粒径分布受组成煤种、灰分含量及煤灰成分等因素的影响.     

控制爆破在白音诺尔铅锌矿二选厂改扩建中的应用

针对白音诺尔铅锌矿二选厂改扩建新增厂房场地平整及基础开挖和改造旧厂房,拆除旧厂房内部框架结构难、进度慢的问题,采用控制爆破技术,进行场地爆破开挖和框架结构梁、柱的拆除,取得了良好的效果并获得良好的经济效益。