化学镀Ni-Cu-P添加剂的研究

通过对化学镀Ni-Cu-P合金的稳定剂、表面活性剂、光亮剂对镀层性能及镀液稳定性的影响研究，得出最佳实验配方。     

MODELING AND PREDICTIVE CONTROL OF MIMO NONLINEAR SYSTEMS USING WIENER-LAGUERRE MODELS

In this work, a Weiner-type nonlinear black box model was developed for capturing dynamics of open loop stable MIMO nonlinear systems with deterministic inputs. The linear dynamic component of the model was parameterized using orthogonal Laguerre filters while the nonlinear state output map was constructed either using quadratic polynomial functions or artificial neural networks. The properties of the resulting model, such as open loop stability and steady-state behavior, are discussed in detail. The identified Weiner-Laguerre model was further used to formulate a nonlinear model predictive control (NMPC) scheme. The efficacy of the proposed modeling and control scheme was demonstrated using two benchmark control problems: (a) a simulation study involving control of a continuously operated fermenter at its optimum (singular) operating point and (b) experimental verification involving control of pH at the critical point of a neutralization process. It was observed that the proposed Weiner-Laguerre model is able to capture both the dynamic and steady-state characteristics of the continuous fermenter as well as the neutralization process reasonably accurately over wide operating ranges. The proposed NMPC scheme achieved a smooth transition from a suboptimal operating point to the optimum (singular) operating point of the fermenter without causing large variation in manipulated inputs. The proposed NMPC scheme was also found to be robust in the face of moderate perturbation in the unmeasured disturbances. In the case of experimental verification using the neutralization process, the proposed control scheme was found to achieve much faster transition to a set point close to the critical point when compared to a conventional gain-scheduled PID controller.     

活性炭对含铬废水的吸附处理研究

研究了活性炭吸附处理实验室模拟含铬废水。实验结果表明,当活性炭用量为1 g,废水pH=4~5,吸附接触时间大于1 h,活性炭与铬含量比值大于5 mg Cr6+/g活性炭时,处理效果可达99%以上;吸附符合Freund lich等温模式,吸附等温方程式为logq=0.7780+0.9716 logc,以物理吸附为主;吸附穿透体积为25 mL,活性炭吸附Cr6+的工作吸附容量为14.59 mg Cr6+/g活性炭,工作饱和吸附容量为803.41 mg Cr6+/g活性炭。     

Continuous-time norm-constrained Kalman filtering

This paper considers continuous-time state estimation when part of the state estimate or the entire state estimate is norm-constrained. In the former case continuous-time state estimation is considered by posing a constrained optimization problem. The optimization problem can be broken up into two separate optimization problems, one which solves for the optimal observer gain associated with the unconstrained state estimates, while the other solves for the optimal observer gain associated with the constrained state estimates. The optimal constrained state estimate is found by projecting the time derivative of an unconstrained estimate onto the tangent space associated with the norm constraint. The special case where the entire state estimate is norm-constrained is briefly discussed. The utility of the filtering results developed are highlighted through a spacecraft attitude estimation example. Numerical simulation results are included.     

Improving the performance of Invertible Bloom Lookup Tables

Invertible Bloom Lookup Tables (IBLTs) have been recently introduced as an extension of traditional Bloom filters. IBLTs store key-value pairs. Unlike traditional Bloom filters, IBLTs support both a lookup operation (given a key, return a value) and an operation that lists out all the key-value pairs stored. One issue with IBLTs is that there is a probability that a lookup operation will return “not found” for a key. In this paper, a technique to reduce this probability without affecting the storage requirement and only moderately increasing the search time is presented and evaluated. The results show that it can significantly reduce the probability of not returning a value that is actually stored in the IBLT. The overhead of the modified search procedure, compared to the standard IBLT search procedure, is small and has little impact on the average search time.     

十四醇聚氧化烯烃醚琥珀酸单酯磺酸盐的表面活性研究

合成了一系列十四醇聚氧乙烯醚和聚氧丙烯醚琥珀酸单酯磺酸盐，比较了其临界胶束浓度、润湿力、起泡力等表面活性     

NBR／EPDM的增容共混研究

本文采用第三组份增容途径,改善了NBR/EPDM并用胶的相容性、加工性和力学性能。通过对不同增容体系的研究对比,发现不同增容剂的增容效果差异很大,其巾以EVA-14增容效果最为显著,加入该增容剂的并用胶,在适当的工艺条件及硫化体系下,可获得最佳力学性能。本文还研究了不同增容剂对并用炭黑胶各种性能的影响,可以做到在不降低并用胶的力学性能的同时,提高并用胶的耐热空气老化、耐大气老化和耐臭氧老化性能.透射电镜实验和动态力学谱图证明了加与未加增容剂时,NBR/EPDM并用胶均为两相结构,增容剂起表面活性剂的作用,加强了两相界面间的相互作用,使分散相EPDM细微化和均匀化。     

雅砻江楞古水电站场址区宋玉断层活动性研究

楞古水电站位于区域构造复杂的雅砻江中游, 场址周边断裂构造较发育, 场址区内发育有较大的宋玉断层, 研 究其活动性对枢纽建筑布置和工程抗震设防措施均具有重要意义。在遥感解译的基础上, 通过野外验证和追踪调 查, 结合断层构造岩石英形貌扫描、 电子自旋共振(ESR) 测龄和近代地震震中分析, 确定了宋玉断裂的活动年代, 得 出了宋玉断层不属于工程活动断层的结论。     

相转移催化法合成多聚乙二醇二环氧甘油醚

以多聚乙二醇和环氧氯丙烷为原料合成了多聚乙二醇二环氧甘油醚。NaOH为催化剂,季铵盐为相转移催化剂。结论为:作为催化剂NaOH固体效果优于NaOH溶液;四正丁基硫酸氢铵(TBAS)催化醚化反应效果最佳,GC监测表明,二醚的选择性达98％以上;n(多聚乙二醇):n(环氧氯丙烷):n(NaOH):n(TBAS)= 1:10:7:0．08;反应温度55-60℃;反应时间1．5 h;产率83％。     

杀虫植物的研究新进展及应用发展前景

介绍了近几年杀虫植物研究的新进展，主要包括楝科、卫矛科、豆科、菊科、胡椒科、百部科、瑞香科等科杀虫植物的作用方式和部分植物的有效成分与作用机制及杀虫植物的应用概况，并分析了其应用发展前景。