高吸水性树脂的合成及其应用

对高吸水性树脂的合成方法、性能改进及应用的现状进行了综述，讨论了微波辐射用于高吸水性树脂合成的技术优势及应用现状，对高吸水性树脂的分子设计与颗粒形状设计，以及在吸水与保水性能方面的应用等进行了评述。     

利用新生CO气泡脱除铁液中的氮

大气条件下,在灰铸铁液和钢液中分别吹入O2,CO2气体并加脱氮剂以确定脱氮能力和测定表观脱氮速率常数,结果表明,在一定范围内吹气和加脱氮剂都能有效脱氮,在1400℃灰铸铁液中吹CO2,测得表观脱氮速率常数为0．095s^-1,%^-1。此外,还对脱氮限制性环节及各种影响因素进行了讨论。     

仿人头像机器人“H＆Frobot-Ⅲ”语音及口形系统研制与实验

为进一步研究仿人头部器官及面部表情的行为智能,以及机器人与人类交流问题,首次将口形及其与语音协调问题引入到表情机器人系统,并进行研究。在已研制成功的具有面部表情及视觉仿人头像机器人系统“H＆Frobot-Ⅱ”基础上,根据人面部运动肌肉解剖学及Ekman面部表情编码系统FACS,论述了口部动作驱动点设置、口形驱动机构及控制方法,设计、研制了语音及口形系统;最后给出了机器人“H＆Frobot-Ⅲ”的语音识别与口形协调实验结果,其口形与人讲同样话时口形能够很好地吻合,验证了语音与口形系统的可行性,从而为进一步研究机器人表情智能奠定了技术基础。     

NiMn composite electrodes as cathode material for hydrogen evolution reaction in alkaline solution

NiMn composite catalysts (C/NiMn, C/NiMnZn, C/NiMnZn–PtRu and C/NiMnZn–PtPd) have been prepared on the graphite substrate (C) by electrochemical deposition as electrocatalytic materials for hydrogen evolution reaction (HER). The NiMnZn coatings were etched in a concentrated alkaline solution (30% NaOH) to produce a porous and electrocatalytic surface suitable for the HER. After the leaching process, a low amount of binary PtPd and PtRu were deposited onto the etched NiMnZn deposit in order to improve the catalytic activity for the HER. Surface morphology and composition of the catalysts were analyzed by scanning electron microscopy (SEM) and energy dispersive analysis of X-ray (EDX).     

Sequence-dependent enrichment of a model phosphopeptide: a combined MALDI-TOF and NMR study

The goal of this study was to detect and quantify by MALDI-TOF MS the phosphorylation of a peptide containing the recognition motif of the Protein Kinase C (PKC). Such model peptide can be used as a phosphorylation probe to follow intracellular kinase/phosphatase activities. This study allowed us to establish relationships between sequence specificities and affinity for TiO(2) or IMAC media. The peptide has the sequence biotin-GGGGCFRTPSFLKK-NH(2) in which the serine residue can be phosphorylated. Enrichment of the corresponding phosphopeptide, by the dedicated IMAC and TiO(2) affinity chromatography methods, proved inefficient. By combining MALDI-TOF and NMR data, we first showed that the lack of affinity of the phosphopeptide for TiO(2) was partly related to the basic property of its peptide sequence. Furthermore, the peptide shows local structuration around the P(9)- S(10) segment, with formation of a salt bridge between the guanidinium group of the R(7) side chain and the phosphate moiety. In conjunction with an inadequate position of the {biotin-G(4)} N-terminal tag, this local structure could shield the phosphate group, preventing interaction with TiO(2). To improve TiO(2) affinity, the peptide sequence was modified accordingly. The new sequences retained the biological properties while their enrichment by IMAC or TiO(2) became possible.     

透明阻燃不饱和聚酯合成影响条件的研究

研究了用磷酸和环氧氢丙烷合成透明阻燃不饱和聚酯的最适宜条件：当温度为１１０－１２０℃，适当催化剂，逐滴加入环氧氯丙烷，可获得比较理想的效果。     

Une approche basée sur la programmation par contraintes pour affecter des cellules à des commutateurs dans les réseaux cellulaires pour mobiles

This paper discusses the problem of assigning cells to switches in mobile networks. It can be summed up as finding an optimal assignment of cells to switches in order to minimize a cost function composed of the cost of handoff between cells and the cost of cabling between cells and switches. We propose here an algorithm based on constraint programming for this problem. The choice of this method is motivated by its active use of constraints in the search for solutions, which in turn leads to the reduction of the search space and the difficulty of the problem. We introduce a new Constraint Optimization Problem model for assigning cells to switches, a definition of a lower bound on the cost of each cell and a development of search strategies, leading to an efficient way of finding the best solutions. Results showed that our algorithm leads to an optimum solution for medium size networks and can find good solutions for large size networks.     

相律中独立反应方程数的线性解法

给出了平衡体系中独立反应方程数的全面求解方法，并指出独立反应方程就是以化学物质为未知数物线性方程组的系数矩阵的秩。     

One-Dimensional Transient Dynamic Response in Functionally Graded Layered Media

In this study, one-dimensional transient wave propagation in multilayered functionally graded media is investigated. The multilayered medium consists of N different layers of functionally graded materials (FGMs), i.e., it is assumed that the stiffness and the density of each layer are varying continuously in the direction perpendicular to the layering, but isotropic and homogeneous in the other two directions. The top surface of the layered medium is subjected to a uniform dynamic in-plane time-dependent normal stress; whereas, the lower surface of the layered medium is assumed free of surface tractions or fixed. Moreover, the multilayered medium is assumed to be initially at rest and its layers are assumed to be perfectly bonded to each other. The method of characteristics is employed to obtain the solutions of this initial-boundary-value problem. The numerical results are obtained and displayed in curves showing the variation of the normal stress component with time. These curves reveal clearly the scattering effects caused by the reflections and refractions of waves at the boundaries and at the interfaces of the layers. The curves also display the effects of non-homogeneity in the wave profiles. The curves further show that the numerical technique applied in this study is capable of predicting the sharp variations in the field variables in the neighborhood of the wave fronts. By suitably adjusting the material constants, solutions for the case of isotropic, homogeneous and linearly elastic multilayered media and for some special cases including two different functionally graded layers are also obtained. Furthermore, solutions for some special cases are compared with the existing solutions in the literature; very good agreement is found.