Adsorption properties of the double-imprinted electrospun crosslinked chitosan nanofibers

Pb(II)-Cd(II) double-imprinted electrospun crosslinked chitosan nanofibers (Pd/Cd-DIECCNs) were prepared by combining electrospinning and ion-imprinting methods, which showed excellent adsorption capacity for both Pb(II) and Cd(II).     

一类双参共振的梁方程边值问题解的存在性

本文讨论了和四阶梁方程的两参数特征值问题u（4）－αu十＝0，u（O）＝u（1）＝u″（1）＝u（1）＝0相对应的非线性双参共振梁方程边值问题u（4）－α1u十βu十g（x，u，u″）＝h（x），u（0）＝u（1）＝u″（0）＝u（1）＝0其中（α1，β1）为特征值对）的解的存在性．应用Lyapunav－Schmidt过程和Leray－Schauder连续定理，得到了该问题的一个存在性结果．推广了Gupta在文［3］中的工作．     

HFC-143a和HFC-236fa饱和蒸气压的实验研究

改进了Burnett法PVTx性质实验台,温度和压力测量的最大不确定度分别为±10 mK和±400 Pa。精确测量了50组HFC-143a的饱和蒸气压实验数据,提出了一个5项的HFC-143a饱和蒸气压方程,适用于161.34 K到临界温度。与文献数据比较表明,改进后的实验台精度令人满意。测量了77组HFC-236fa的饱和蒸气压实验数据,温度范围为253-396 K,压力范围为44-3064 kPa。根据本文实验结果,拟合得到了一个Wagner型饱和蒸气压方程,与文献数据进行了比较,计算得到了HFC-236fa的正常沸点和偏心因子值。     

一类非线性算子方程的最小最大耦合拟解的存在性

摘要：本文利用半序方法。研究了一类非线性算子方程的最小最大耦合拟解的存在性。得到几个新的存在性定理，并且改进和推广了中相关结果．     

燃气轮机采用不同冷却技术对IGCC系统性能影响

本文分析了用于燃气轮机系统的冷却技术,对采用空气冷却技术的GE-9FA,GE-9G型燃气轮机以及采用蒸汽冷却技术的GE-9H型燃气轮机进行了设计工况点的校核,通过定量计算重点研究了采用两种不同冷却技术的燃气轮机整合到IGCC系统中对系统热力性能、系统参数优化规律及环保性能的影响,从而为研究高效、环保的IGCC系统提供有价值的参考。     

快速高精度凸轮磨微进给控制

改进加工流程及升降速控制可以缩短砂轮进退时间，改善快速性。降速停止过程中，驱动速率低于启动频率后，利用在某相定位位置使电机停转来提高定位精度，再加上CCD复位检测，利用计数器对粗磨总量、精磨总量返回位置的确认等措施可以有效地缓解此矛盾。在改造后的NEWCAM凸轮磨中得到实现。     

调和映射理论中Euler方程的解和它在广义相对论中的应用

本文讨论了调和映射理论中Euler方程的解以及解与解之间的关系。并以此观点出发,研究了Ernst方程和该方程的解。 关键词：     

Study on the laser treatment of electroless Ni-P-SiC composite coatings

Effect of the laser treatment on electroless Ni-P-SiC composite coatings was investigated. The microscopic structure, surface morphology, ingredient, and performance of the Ni-P-SiC composite coatings were synthetically analyzed by the use of X-ray diffraction apparatus, scanning electron microscope, energy distribution spectrometer, micro-hardness tester, wear tester and so on. It was found that the composite coatings did make crystalloblastic transformation after laser heating. Structural analysis confirmed that some new types of phase Ni2Si or Ni3Si compound would emerge in the Ni-P-SiC coatings after laser treatment. The micro-hardness measurement results showed that when the laser power was 450 W with scanning speed of 0.5 m/min, the hardness of the coating was superior to the coating obtained by the conventional furnace heating, and wear resistance of the composite coating after laser treating could also improve.     

GENERAL SOLUTIONS OF A CLASS OF DISSIPATIVE SYSTEMS AND THEIR APPLICATIONS

General solutions are obtained for a class of quantum dissipative systems. This is achieved by calculating the characteristic function in the Heisenberg picture. The irreversible behavior of these systems is nalyzed. The general formalism is applied to some typical examples and the influence of noise on these systems is gained.     

REALIZATION OF THE WAVE-PACKET-COLLAPSE —A VIEWPOINT TO THE QUANTUM MEASUREMENT THEORY

An interpretion of the wave-packet-collapse (WPC) in the system of quantum mechanics is given. We find a connection between the WPC and the limitation to the measurement precision determined by the quantum fluctuation. A simple and explicit relation about them is obtained.