国产引进型300MW汽轮机通流部分的改造

国产引进型300MW机组经常出现高压缸效率低和轴封漏汽量大的故障,影响了机组运行的经济性。介绍了300MW机组通流部分采用布莱登汽封和蜂窝汽封相结合的改造方法,对改造前、后的性能数据进行了比较,得出了合理使用新型汽封模式且有利于改善和提高机组性能的结论。     

油菜磷脂中磷脂酰胆碱的液相色谱分析方法

建立了油菜磷脂中磷脂酰胆碱的液相色谱分析方法.为了避免流动相在紫外(UV)200～210 nm处有吸收,对磷脂酰胆碱(PC)检测产生干扰,选用蒸发光散射检测器(ELSD)进行油菜磷脂中PC定量分析的研究.采用Alltima Silica 5u,250 mm×4.0 mm色谱柱,流动相为9:1(V/V)的甲醇/乙腈,流速为0.5 mL/min等度洗脱;ELSD检测器漂移温度为70℃,载气流速1.5 L/min,增益1.该法检测PC具有更少的干扰和更高的检测灵敏度,时间更节省,PC在15 min完成分析.在0.2068～1.034 mg/mL范围内,线性相关系数(R~2)为1.00,重复变异系数为1.16%,具有良好的线性关系和重复性,有较好的实用价值.     

醋酸胶溶剂对Hβ分子筛催化剂性能的影响

实验考察了醋酸胶溶剂对Hp分子筛催化剂成型强度的影响,并以丙烯和苯合成异丙苯为模型反应,分别以气-液半连续和液-液连续操作两种方式,实验评价催化剂的性能。结果表明：催化剂强度随成型过程中醋酸用量的增加呈现先增大后减小的趋势,最高催化剂强度对应的醋酸用量为6％。随着醋酸用量增加,催化剂活性略有增加,对异丙苯选择性影响不大,但催化剂稳定性却降低。     

单缸试验机运行工况确定的新方法

提出了一种新的单缸机运行工况确定方法--按照HP IMEP(高压循环平均指示压力)来确定单缸机的试验工况,试验验证表明,该方法能够更合理地设定单缸试验机的运行工况,从而达到单缸机准确模拟多缸整机的效果.     

300MW汽轮机调门门杆松动的原因及对策

通过分析高调门门杆在运行状态时的受力情况,揭示了高调门门杆杆松动的原因,分析了其危害性,并提出了改进意见。     

Effect of pulsed electric fields and high pressure on improved recovery of high-added-value compounds from olive pomace

Olive pomace is considered a solid by-product and a rich source of valuable compounds such as polyphenols, flavonoids with antioxidant properties, and proteins. Nonthermal technologies, which cause alterations to cell permeability, are being explored to assist conventional recovery techniques. The aim of this study was to assess the effect of pulsed electric fields (PEF) and high pressure (HP) on improved recovery yield of the high-added-value compounds or to shorten the extraction time of these compounds. Olive pomace (Tsounati cv) was pretreated with PEF (1.0 to 6.5 kV/cm, 0.9 to 51.1 kJ/kg, and 15 µs pulse width) or HP (200 to 600 MPa and 0 to 40 min). Evaluation of the intracellular compounds extracted via solid–liquid extraction (50% ethanol–water solution) was performed. More intense PEF and HP conditions resulted in a significant increase of the phenolic concentration up to 91.6% and 71.8%, respectively. The increased antioxidant capacity of each extract was correlated to phenolic compound concentration. The protein concentration that was achieved with PEF pretreatment was doubled; however, HP-pretreated extracts reached 88.1% higher yield than untreated for pressures up to 200 MPa. HP and PEF pretreatment decreased extraction completion time t₉₈ (needed time to recover the equal amount of phenolics and proteins of untreated after 60 min of conventional extraction) to 12 min and lower than 1 min, respectively. To conclude, both pretreatments are effective in improving the conventional extraction process for increased yield recovery of high-added-value compounds from olive pomace.     

可编程逻辑器件在HP82000系统上测试

文中介绍了电擦除可编程逻辑器件在ＨＰ８２０００系统上的功能测试及参数测试。     

基于双轴转台的惯性器件自动标定系统研制

基于Acutronic双轴转台，采用GPIB接口卡、HP34401A数字万用表、计算机工作站及VC开发平台等，开发了一套惯性器件自动标定系统。实现了对转台的实时测控，信号采集、数据处理、标定计算、标定报告的显示、打印和存贮的计算机自动完成，并提高了标定精度，为在捷联惯性导航系统中对器件进行系统级修正提供了保障。     

HP VEE的高级编程技术

介绍了ＨＰ ＶＥＥ５．０的一些高级编程技术，包括网络监控、ＶＥＥ与应其它应用程序的相互调用和数据交换，这些技术可以加强程序的仪器控制和数据处理能力。     

Recent advances in artificial neural network research for modeling hydrogen production processes

Artificial Neural Networks (ANN) have been widely used by scientists in a variety of energy modes (biomass, wind, solar, geothermal, and hydroelectric). This review highlights the assistance of ANN for researchers in the quest for discovering more advanced materials/processes for efficient hydrogen production (HP). The review is divided into two parts in this context. The first section briefly mentions, in terms of technologies, economy, energy consumption, and costs symmetrically outlined the advantages and disadvantages of various HP routes such as fossil fuel/biomass conversion, water electrolysis, microbial fermentation, and photocatalysis. Subsequently, ANN and ANN hybrid studies implemented in HP research were evaluated. Finally, statistics of hybrid studies with ANN are given, and future research proposals and hot research topics are briefly discussed. This research, which touches upon the types of ANNs applied to HP methods and their comparison with other modeling techniques, has an essential place in its field.