酚酞聚芳醚酮（PEK－C）填充料的研究

本文筛选出几种特定的酸性金属氧化物填料，研究了其粒度及粒子形状对ＰＥＫ－Ｃ的复合化效果和填充后的ＰＥＫ－Ｃ体系的力学性能、加工性能和结构形态。结果表明，ＴｉＯ２、Ｃｒ２Ｏ３、Ａ１２Ｏ３及ＭｏＳ２等与ＰＥＫ－Ｃ具有良好的亲合性，对ＰＥＫ－Ｃ起到了明显地增量、补强作用。在保持ＰＥＫ－Ｃ树脂的基本物理性能前提下，可降低注射用ＰＥＫ－Ｃ专用料的价格。     

固体酸催化合成水杨酸异丙酯的研究

水杨酸异丙酯是一种重要的化工原料和药物中间体 ,现行合成工艺存在诸多缺点。因此 ,新型高效催化剂的开发和工艺改进是水杨酸异丙酯合成的一个重要课题。以固体酸SA为催化剂合成水杨酸异丙酯 ,发现固体酸SA对水杨酸异丙酯合成具有良好的催化活性。考察并优化了固体酸SA催化合成水杨酸异丙酯的工艺条件。实验结果表明 ,采用优化的工艺条件 ,固体酸SA催化剂可减少催化剂用量 ,提高总收率 ,缩短生产周期 ,降低生产成本     

基于多分辨率奇异值分解的图像融合

提出一种新的基于多分辨率奇异值分解（ MSVD）图像融合算法。算法对源图像进行MSVD处理,使其分解为互不相关的平滑和细节分量,并对平滑分量进行多层次的分解与处理。类似于小波变换,多分辨率奇异值分解的基本思想是在平滑分量的每一层上用奇异值分解（ SVD）来取代滤波,最终利用融合规则对图像进行MSVD融合。利用5种评价算子来评价算法,得到的融合效果很好。与基于小波分解的算法相比,算法计算简单、实时性突出,对复杂、高像素图像处理更简单方便。     

多总线接口信号处理SoC虚拟验证平台的实现

多总线接口信号处理SoC芯片是以信号处理DSP为核心集成了多个总线接口的片上系统,该SoC涉及的总线协议众多,验证复杂、工作量大,验证将是该SoC芯片开发的瓶颈。为了缩短多总线接口信号处理SoC芯片的开发周期,提高该SoC芯片的一次流片成功率,必须采用更为可靠和有效的验证方案。以SoC验证流程及方法为指导,重点介绍了多总线接口信号处理SoC虚拟验证平台的构建和具体实施。验证结果表明,该验证平台能高效、全面验证芯片功能,提高了芯片验证效率,缩短了整个芯片开发周期,为芯片的成功投片提供了可靠保障。     

溶胶-凝胶法CaO-P2O5-SiO2系生物玻璃的制备及机理探讨

以正硅酸乙酯[Si(OC2H5)4]、四水硝酸钙[Ca(NO3)2*4H2O]等作为前驱体,采用溶胶-凝胶工艺制备CaO-P2O5-SiO2系生物活性玻璃,把制备的样品放在模拟体液中浸泡一段时间后取出,以X-射线衍射、红外光谱等手段对其作物相分析,确定在玻璃的表面有羟基磷灰石相生成,同时对其形成机理做了进一步探讨.     

醋酸正丁酯生产中硫酸用量对中和操作的影响

研究了在醋酸正丁酯工业化生产中催化剂硫酸用量对中和反应的影响，分析了产生这种影响的原因。     

BaTiO3系PTCR材料电学性能的复阻抗解析

采用复阻抗解析法研究了ＢａＴｉＯ３系ＰＴＣＲ材料晶粒、晶界的电学性能。结果表明：使用欧姆接触电极的ＰＴＣＲ材料等效电路的复阻抗为：晶粒电阻呈ＮＴＣ特性，而晶界电阻天Ｔ〈Ｔｃ时呈ＮＴＣ特性，Ｔ〉Ｔｃ时呈明显的ＰＴＣ特性；ＰＴＣ效应是一种晶界效应。     

Adaptive joint bandwidth and power allocation in heterogeneous wireless access environment

Joint bandwidth and power allocation for a multi-radio access(MRA)system in a heterogeneous wireless access environment is studied.Since both the number of users being served by the system and the wireless channel state are time-varying,the optimal resource allocation is no longer a static optimum and will change with the varying network state.Moreover,distributed resource allocation algorithms that require iterative updating and signaling interactions cannot converge in negligible time.Thus,it is unrealistic to assume that the active user number and the wireless channel state remain unchanged during the iterations.In this paper,we propose an adaptive joint bandwidth and power allocation algorithm based on a novel iteration stepsize selection method,which can adapt to the varying network state and accelerate the convergence rate.A distributed solution is also designed for the adaptive joint resource allocation implementation.Numerical results show that the proposed algorithm can not only track the varying optimal resource allocation result much more quickly than a traditional algorithm with fixed iteration stepsize,but can also reduce the data transmission time for users and increase the system throughput.     

Robust sparse principal component analysis

The model for improving the robustness of sparse principal component analysis（PCA） is proposed in this paper. Instead of the l2-norm variance utilized in the conventional sparse PCA model,the proposed model maximizes the l1-norm variance,which is less sensitive to noise and outlier. To ensure sparsity,lp-norm（0 p 1） constraint,which is more general and effective than l1-norm,is considered. A simple yet efficient algorithm is developed against the proposed model. The complexity of the algorithm approximately linearly increases with both of the size and the dimensionality of the given data,which is comparable to or better than the current sparse PCA methods. The proposed algorithm is also proved to converge to a reasonable local optimum of the model. The efficiency and robustness of the algorithm is verified by a series of experiments on both synthetic and digit number image data.     

搬运机械手PLC操控

介绍PLC对搬运机械手的控制方式,重点阐述系统硬件及软件的设计。