基于DSP+CPLD的高精度信号发生器

介绍了基于直接数字式频率合成(DDS)原理的全数字信号发生器(DSP),利用DSP芯片快速、高精度的运算优势以及CPLD芯片灵活的编程逻辑、大容量存储功能的特点,采用通用可编程芯片以及数字波形合成技术,形成高稳定、高精度、高动态的数字合成信号.该信号发生器可产生0～25 kHz的正弦波、三角波和方波,输出电压峰峰值为0～5 V,频率步进1 Hz,幅度步进0.001 V.     

基于PCI总线的高速多路数据传输卡设计

介绍了一套基于外部设备互连(PCI)总线的高速多路数据传输卡的设计,采用基于PCI内核与PCI用户逻辑相结合的新型设计方案,在顶层通过仿真来验证PCI接口以及用户逻辑设计正确与否.降低了设计的复杂程度,提高了电路的集成度和系统的性能,并根据PCI卡对外部设备驱动能力较弱的特点,在传输卡中加入了长线驱动功能,采用低电压差分信号(LVDS)技术,既降低了系统功耗,又实现长距离的计算机双向通信.     

基于SPA的模式识别

发展和深化了集对分析（SPA）基础理论，并在此基础上探讨了基于集对分析的模式识别方法，给出了集对模式识别的三个判定原则，这对SPA的发展及其在模式识别中的应用提供了理论支持。     

中国首创五大新兴智能基础学科的交叉应用与展望

可拓学、灰色系统、界壳论、集对分析和消错学这五大新兴智能基础学科都是我国首创的理论。本文首先简单介绍了五大学科，随后给出了五大学科的关系矩阵并讨论了其交叉应用的发展概况，最后对其交叉所产生的空白领域追行了初步的探讨，然后对其未来发展进行了展望。     

中国石油石蜡基橡胶油系列产品在橡胶工业中的应用

中国石油研制生产的健康环保型石蜡基橡胶填充油系列产品，具有浅颜色、低芳烃、高饱和烃含量等特征，是中国石油的优质特色产品。该系列产品在国内橡胶行业中已得到广泛应用，其中，KP6025、KP6030石蜡基橡胶油通过了2001年中国石油润滑油公司的鉴定，该产品的研制成功，填补了这一领域的国内空白，产品性能优于国外同类产品，为国内橡胶企业的产品结构调整创造了条件，推动了我国橡胶产业向国际先进水平的发展，具有重大的经济和社会效益。主要综述了中国石油石蜡基橡胶油的应用与评价情况。     

四川马海毛钢花呢的试制

根据四川马海毛原料资源的品质特性，运用精纺粗做的方法，成功地试制出手感滑糯而富有弹性、光泽明亮悦目，各项物理指标符合FZ/T24002-93标准的四川马海毛纯毛钢花呢，达到了马海毛产品的特殊风格。同时指出四川马海毛制成率偏低。     

基于压水试验数据的渗透系数应力敏感性研究

岩体渗透率与应力关系是进行岩体渗流应力耦合分析的基础。基于龙滩水电站边坡岩体渗流压水试验结果和边坡岩体岩性及物理力学性质，对岩体渗透系数和地应力进行了分析计算，给出了边坡岩体渗透率随应力变化的关系式，为进行边坡岩体渗流一应力耦合分析提供了可靠数据。     

The Bisphosphonate Clodronate Modifying Hydroxyapatite Bioceramics for Bone Scaffold

To investigate the efficiency of clodronate modifying HA bioceramics,and to evaluate the effect of clodronate modifying HA bioceramics on the cells in vitro,clodronate modified the porous HA bioceramics for bone scaffold by chelation .The outermost layer of the specimens was analyzd by XPS and FI-IR ,The depth profile was investigated by the argon-ion sputtering method.The cell culture test was conducted using MC3T3-E1 osteoblastic cells,The cells were inoculated and cultured on the scaffolds.Morphological observation of the cells,MTT test and ALP activity test evaluated the cell attachment ,proliferation and activity on the scaffolds.The cell culture test in cell quantity and morphology indicated active proliferation of the cells on the scaffolds.The ALP activity of the cells cultured for 3d and 7d on clodronate-HA bioceramics was slightly higher than that on HA bioceramics ,but the difference was not signifcant,This result indicated that clodronate-HA bioeramics had favorable cytocompatibility to be used as bone scaffold with potential ability to improve asteogensis.     

Plasma Sprayed Hydroxyapatite Coatings with Nano-hydroxyapatite Prepared by Ultrasonic Precipitation Process

Nano-particle hydroxyapatite （ HA ） was prepared with a novel ultrasonic precipitation process and the as-prepared nanopowder was used to produce hydroxyapatite （ HA ） coatings on titanium substrate via plasma spraying. The phase and the microstructare of the coating were characterized by X- ray diffraction （XRD） and scanning electron microscopy （SEM）. Results showed that spherical particles could be prepared by ultrasonic precipitation process; and a corresponding dense HA coating with molten surface and low-porosity cross-section structure was acquired. During the plasma spraying process, new phases of Ca3 （ PO4 ）2 and Ca2 P2O7 were generated. After heat-treating at 800℃ for 1 h, the contents of Ca3 （ PO4 ）2 and Ca2 P2O7 decreased while HA content increased. Tensile adhesion tests showed that the plasma sprayed coating prepared with the spherical nanoparticles exhibited high tensile bond strength.