盐酸阿莫地喹溶剂残留顶空气相色谱法测定的方法学研究

建立顶空气相色谱法分析盐酸阿莫地喹中溶剂残留。采用顶空气相色谱法,用DB-FFAP大口径毛细管柱,以正丙醇为内标进行定量。甲醛,乙醇,甲苯的线性范围分别为2.7￣32.7μg·mL-1(r=0.9992),4.4￣52.8μg·mL-1(r=0.9996),2.1￣25.2μg·mL-1(r=0.9987),回收率分别为92.3%,109.1%,114.4%。本方法简单,准确,灵敏度高,重现性好。     

变离心力场中等截面冷却通道的流量计算和实验研究

本文用数值计算得到的数据集，回归出在变离心力场下，等截面管流由于热阻力引起的变密度流流量减少公式，并用热平衡法在旋转试验台上测量了加热条件下通道内的加热量和平均流速．由实验数据集回归出的流量减少公式与数值计算结果相符．     

煤气发生炉气化过程分析与提高煤气品质的技术措施

对煤炭气化过程进行理论分析,阐明了反应温度对煤炭气化过程热效率的影响.根据煤气发生炉的气化特性指标,探讨了影响煤气发生炉气化品质的因素,从煤炭性质、煤炭粒度及饱和温度等方面得出了提高煤气品质的技术措施.     

液固顶空气相色谱法测定西洛他唑中溶剂残留

建立液固顶空气相色谱法分析西洛他唑中溶剂残留。采用DB-FFAP大口径毛细管柱,以正丙醇为内标进行定量。乙醇、DMF的线性范围分别为 1.5￣30.2μg·mL-1　(r=0.9993),1.8￣36.4μ g·mL-1(r=　0.9968);回收率分别为104.8%,105.2%。最低检测限分别为0.01μ g·g-1,0.16μg·g-1。     

毛细管气相色谱外标法同时测定肉鸡肌肉中8种脂肪酸

目的：建立肉鸡肌肉原料中8种脂肪酸含量的毛细管气相色谱分析方法。方法：采用石英毛细管气相色谱柱,利用外标法同时定量分析8种脂肪酸含量。结果：线性关系(r)分别为0．9996～0．9999,加标回收率分别为99．7%～ 101．2%,相对标准偏差(RSD)分别为0．16%～0．94%。结论：采用毛细管气相色谱法同时分析多种脂肪酸,简便、高效、准确、分析时间适中。     

果蔬气调包装设计及贮藏期预测

建立了果蔬气调包装的数学模型,通过数值模拟预测包装袋内的气体浓度变化及达到动态平衡时的气体浓度,给出了包装材料的确定方法及不同气调参数下果蔬气调包装贮藏期的预测方法.以黄桃为研究对象,测定了5℃和25℃下自发气调包装的气体浓度变化规律,进行了0℃及体积分数为2%O2、5%CO2初始浓度条件下的主动气调包装贮藏实验.实验结果验证了数学模型预测结果的正确性.     

王夫之与费尔巴哈自然观的比较研究

王夫之和费尔巴哈是中西哲学发展史上重要的唯物主义哲学家。在自然观上,他们有相似的正确认识,都认为世界统一于物质,事物是不断地运动变化的,其运动变化是有规律的。王夫之的自然观具有丰富的辩证法思想,而费尔巴哈的自然观缺乏辩证法。     

Compressed Natural Gas Bus Safety: A Quantitative Risk Assessment

This study assesses the fire safety risks associated with compressed natural gas (CNG) vehicle systems, comprising primarily a typical school bus and supporting fuel infrastructure. The study determines the sensitivity of the results to variations in component failure rates and consequences of fire events. The components and subsystems that contribute most to fire safety risk are determined. Finally, the results are compared to fire risks of the present generation of diesel-fueled school buses. Direct computation of the safety risks associated with diesel-powered vehicles is possible because these are mature technologies for which historical performance data are available. Because of limited experience, fatal accident data for CNG bus fleets are minimal. Therefore, this study uses the probabilistic risk assessment (PRA) approach to model and predict fire safety risk of CNG buses. Generic failure data, engineering judgments, and assumptions are used in this study. This study predicts the mean fire fatality risk for typical CNG buses as approximately 0.23 fatalities per 100-million miles for all people involved, including bus passengers. The study estimates mean values of 0.16 fatalities per 100-million miles for bus passengers only. Based on historical data, diesel school bus mean fire fatality risk is 0.091 and 0.0007 per 100-million miles for all people and bus passengers, respectively. One can therefore conclude that CNG buses are more prone to fire fatality risk by 2.5 times that of diesel buses, with the bus passengers being more at risk by over two orders of magnitude. The study estimates a mean fire risk frequency of 2.2 x 10(-5) fatalities/bus per year. The 5% and 95% uncertainty bounds are 9.1 x 10(-6) and 4.0 x 10(-5), respectively. The risk result was found to be affected most by failure rates of pressure relief valves, CNG cylinders, and fuel piping.     

几种典型的烟气脱硫技术

烟气脱硫是控制二氧化硫污染的常用方法,我国的烟气脱硫技术研究从19世纪五十年代开始,目前已形成较多的应用技术。文中对国内几种典型的烟气脱硫技术的工艺流程、特点、应用情况及其发展做了介绍。     

中国油气能源效率变动趋势分析*

效率问题是高质量发展的关键问题。提高油气能源效率，对于保障油气能源安全、实现油气产业高质量发展、促进社会经济持续稳定安全运行具有重要意义。为此，运用非期望产出的窗口DEA模型对中国2001—2016年30个省、直辖市、自治区的面板数据进行测算，以此分析中国及各区域全要素油气能源效率。研究得出：（1）中国油气能源效率持续提高；（2）油气能源效率水平及其差距存在显著地域性差异；（3）在内外部因素共同作用下，油气能源效率差距逐步缩小。结合我国发展实际，提出如下建议：（1）积极响应绿色发展要求，推进现代能源体系建设；（2）明确能源商品属性，发挥市场配置资源的作用；（3）以产业结构调整、科学技术创新推动能源效率提升；（4）根据地区发展实际，合理规划能源发展布局；（5）把握高质量发展的内涵要义，推动能源效益变革。