循环流化床锅炉J形返料阀的试验研究

对循环流化床锅炉J形返料阀以充气口高度、J阀管径和J阀管转弯处圆弧段所包围的角度这3个因素作为影响J阀调节性能的结构因素 ,以物料流量和J阀充气量之间的线性相关系数、回归直线斜率和流量调节范围为优化试验指标 ,通过正交试验获得了J阀的最优结构     

芯壳乳液胶粘剂的研究

介绍乙酸乙烯酯－丙烯酸丁酯－丙烯酸芯结构乳液的制备方法，并将它们的性能与均匀共聚乳液作了测试与比较。     

新型煤粉燃烧器的特性分析和产能发挥探索

实践证明,一次风用量、风道风速、旋流风的旋转和扩散、风压、二次风温、喂煤系统的计量准确性和稳定性是影响燃烧器性能发挥的主要因素。燃烧器的调试工作是一个复杂的系统工程,必须有计划、按步骤进行。燃烧器在使用中,要加强检查维护,对出现的损伤要及时进行修理。     

A continuous-time framework for least squares parameter estimation

This paper proposes a continuous-time framework for the least-squares parameter estimation method through evolution equations. Nonlinear systems in the standard state space representation that are linear in the unknown, constant parameters are investigated. Two estimators are studied. The first one consists of a linear evolution equation while the second one consists of an impulsive linear evolution equation. The paper discusses some theoretical aspects related to the proposed estimators: uniqueness of a solution and an attractive equilibrium point which solves for the unknown parameters. A deterministic framework for the estimation under noisy measurements is proposed using a Sobolev space with negative index to model the noise. The noise can be of large magnitude. Concrete signals issued from an electronic device are used to discuss numerical aspects.     

溶剂沉淀法制备的聚酰胺粉末之溶剂与粉末结构和热稳定性的关系

使用粒度分布仪、白度仪、电子显微镜和差热仪测定四种溶剂沉淀法制备的聚酰胺粉末发现：每种方法所获得的粉末粒径、比表面积、白度均不相同；以乙醇 氯化钙混合溶剂制备的粉末内部具有多孔结构；以乙醇 盐酸 水混合溶剂制备的粉末热稳定性较高     

牛物法PDO合成PTT结构与性能的研究

采用生物法1，3-丙二醇（PDO）直接酯化缩聚合成聚对苯二甲酸丙二醇酯（PTT），通过IR、^1H NMR、DSC和TG方法对其进行了表征，并与化学法PDO合成的PTT进行比较。结果表明，生物法PDO合成的产物是PTT；生物法PDO合成的肿比同一纯度的化学法PDO合成的肿色泽好、粘度大、摩尔质量高，且随PDO纯度提高，肿粘度、摩尔质量增大；生物法PDO合成的肿熔点与化学法PDO合成的肿相差不大，熔融峰比化学法PDO合成的肿尖锐，熔融热大，结晶度高；不同PDO合成的肿树脂热失重相差不大，表明PDO不同对肿热分解行为影响不大。     

Hydrogen evolution during the oxidation of formaldehyde on Au:: The influence of single crystal structure and Tl-upd

Hydrogen evolution during formaldehyde oxidation in alkaline solution has been monitored by Differential Electrochemical Mass Spectrometry on Au(111) and polycrystalline gold. The current efficiency for hydrogen evolution increases with higher concentration and is in the same range on both, polycrystalline Au and Au(111) electrode. The onset potentials and half-wave potentials are higher on Au(111). Reaction orders for the faradaic current on the bare gold electrodes have been determined as 0.21 for higher and 0.76 for lower concentrations. Reaction orders for hydrogen evolution during formaldehyde oxidation are 1.4 times higher in each case. Tafel slopes in the range of 140-160 mV are found. This signifies that the first reaction step involving the formation of adsorbed hydrogen is largely determining the overall reaction rate. In the presence of thallium adlayers hydrogen evolution from formaldehyde oxidation is largely suppressed. On the thallium modified polycrystalline Au, formaldehyde oxidation is shifted for 100 mV to higher potentials where Tl is partially desorbed and hydroxide is coadsorbed on the modified surface. On thallium modified Au(111), a similar process takes place, but in the same potential region as the onset of formaldehyde oxidation on the bare surface and therefore the formaldehyde oxidation is only slightly shifted. Tafel slopes are decreased to 80 mV/dec in the presence of thallium. In the presence of adsorbed thallium, the first reaction step is in equilibrium, the coverage with adsorbed hydrogen is smaller and its recombination to H₂ is largely suppressed.     

EPVC系列旋风管的结构优化研究

介绍了ＥＰＶＣ系列导叶式旋风管的叶片形状、优化的叶片出口参数间的匹配关系以及新的防返混锥排尘结构，总结了无泄料盘时的排尘机理及尺寸设计要点。另外，还简单介绍了旋风管装置的工业应用情况。     

超声振动对聚合物结构性能的影响

介绍了聚合物挤出成型过程中的超声振动技术，并对挤出模头引入超声振动后对聚合物物理机械性能、相容性、结晶性能的影响进行了评述。