滞后控制系统的一种新型控制算法

在Ｄａｈｌｉｎ算法和改进的Ｓｍｉｔｈ补偿控制算法的基础上．对滞后控制系统数字调节器的设计提出一种新的控制算法．计算机仿真表明该控制算法得到比较满意的控制效果．     

增压流化床燃烧(PFBC)高灰煤的试验研究

本文介绍我所进行PFBC技术首阶段试验研究的情况,发表了五次试验的主要结果。燃用高灰煤时,燃烧效率可达97％～98％。对于中等含硫的煤,Ca/S比在1.5～1.8时,可达80％～85％的脱硫效率。燃气通过高温除尘系统后,含尘量为189mg/m~3(标),颗粒平均直径2.5～3μm,其中大于10μm的不超过3％。     

SmC1_3－C_（12）H_9O_3N—C_2H_5OH三元体系相平衡的研究

用溶解度等温法研究了ＳｍＣｌ＿３—Ｃ＿（１２）Ｈ＿９Ｏ＿３Ｎ［Ｎ—（３—次甲基呋喃）—邻氨基苯甲酸］—Ｃ＿２Ｈ＿５ＯＨ三元系统在２５℃时的相平衡，其溶解度曲线有三支，在该温度系统有两个化合物生成：组成为ＳｍＣｌ＿３·３Ｃ＿（１２）Ｈ＿９Ｏ＿３Ｎ·３Ｃ＿２Ｈ＿５ＯＨ的是固液同成份溶解的化合物；组成为ＳｍＣｌ＿３·４Ｃ＿（１２）Ｈ＿９Ｏ＿３Ｎ的是固液异成份溶解的化合物     

基于正交试验设计的浇筑式沥青混凝土配合比研究

<正>交试验设计是一种高效率且比较经济的试验设计方法.正交试验是根据正交性从全面试验中挑选出部分具有代表性的点进行试验,这些点具备了"均匀分散,齐整可比"的特点,因而得到了广泛应用.采用正交试验设计方法,对浇筑式沥青混凝土材料进行了配合比设计,分析了级配指数、填料用量和沥青用量对浇筑式沥青混凝土稳定度和流值的影响.通过极差分析,研究级配指数、填料用量和沥青用量对浇筑式沥青混凝土稳定度和流值影响作用顺序,以期为沥青混凝土配合比设计提供理论依据和参考.     

设备远程诊断系统的建立及实现技术

研究了一个远程故障诊断系统平台的软、硬件结构,提出了实现方法及所涉及的关键技术．通过这一平台,并结合传统的故障诊断方法,实现设备制造方、设备使用方和诊断专家三方的协同工作,从而可实现现代制造系统的远程故障诊断．该系统的技术思想同样适用于其他领域的远程诊断．     

一种新型水溶性共聚物生物降解性评价

将聚天冬氨酸与脱乙酰基壳聚糖(chitosan)进行共聚反应生成新的水溶性共聚物-一种新型阻垢剂.运用生物方法研究聚天冬氨酸壳聚糖共聚物的可降解性.将共聚物用活性污泥滤液降解处理后,测得其28 d的TOC降解率达到52.95%.其生物降解性能弱于PASP,属于可生物降解物质.研究还表明,水溶液中存在Ca2,Mg2+,Fe3+,Zn2+等金属离子时不会对共聚物的降解性产生明显影响.然而Cu2+以及Hg2+等重金属离子则使共聚物的降解率明显下降.此外,降解残余物的红外分析表明在1 654.27 cm-1处的峰形(酰胺中的C=O伸展振动峰和Schiff碱C=N伸展振动峰的叠加峰)明显变窄,推测聚天冬氨酸共聚物在发生生物降解时,首先在Schiff碱C=N键处断裂.研究结果说明聚天冬氨酸壳聚糖共聚物是可以被生物降解的.     

Genetic variation near IRS1 associates with reduced adiposity and an impaired metabolic profile

Genome-wide association studies have identified 32 loci influencing body mass index, but this measure does not distinguish lean from fat mass. To identify adiposity loci, we meta-analyzed associations between ～2.5 million SNPs and body fat percentage from 36,626 individuals and followed up the 14 most significant (P < 10(-6)) independent loci in 39,576 individuals. We confirmed a previously established adiposity locus in FTO (P = 3 × 10(-26)) and identified two new loci associated with body fat percentage, one near IRS1 (P = 4 × 10(-11)) and one near SPRY2 (P = 3 × 10(-8)). Both loci contain genes with potential links to adipocyte physiology. Notably, the body-fat-decreasing allele near IRS1 is associated with decreased IRS1 expression and with an impaired metabolic profile, including an increased visceral to subcutaneous fat ratio, insulin resistance, dyslipidemia, risk of diabetes and coronary artery disease and decreased adiponectin levels. Our findings provide new insights into adiposity and insulin resistance.     

Nitrogen-doped graphene nanosheets as high efficient catalysts for oxygen reduction reaction

It is of great significance in exploring alternative catalysts to platinum (Pt)-based materials for oxygen reduction reaction (ORR),because this reaction is invariably involved in various fuel cells and metal-air batteries.We herein reported the nitrogen doped graphene nanosheets (NGNSs) with pore volume of as high as 3.42 m 3 /g and investigated their potential application as ORR catalysts,it was demonstrated the NGNSs featured high activity,improved kinetics and excellent long-term stability for ORR.The NGNSs were successfully used as cathode catalysts of microbial fuel cells (MFCs) and performed even better than the commercial Pt/C (Pt 10%) catalysts at the maximum power output.     

从吐蕃墓葬的动物殉葬习俗探吐蕃王朝时期的畜牧业

本从考古发现资料与历史献资料出发，在前人研究的基础上，探讨了吐蕃时期动物殉葬习俗，及所反映出的吐蕃王朝时期畜牧业的发展。