生物芯片扫描仪研究进展

简要介绍生物芯片的基本概念以及生物芯片检测装置的国内外发展动态;分别介绍了本文设计的CCD系统生物芯片检测仪和激光共聚焦生物芯片扫描仪的原理、结构、工作状况以及设备的技术参数。最后指出更高分辨率(小于1μm)的生物芯片扫描仪是该设备今后的发展趋势。     

基于TSIC506的高精度温度检测系统的设计

以ATmega16单片机为控制核心,利用数字化温度传感器TSIC506实现高精度温度检测系统。论述了该系统的硬件组成和软件设计,给出了系统总体结构及相应的ATmega16单片机温度测量程序。实际应用表明,该温度检测系统具有结构简单、成本低、稳定实用等特点,可根据不同需要应用于多种工农业温度检测领域。     

BER Performance of Frequency Domain Differential Demodulation OFDM in Flat Fading Channel

A closed form expression for the bit error rate (BER) performance of frequency domaindifferential demodulation(FDDD) for orthogonal frequency division multiplexing system in flat fadingchannel is derived.The performance is evaluated by computer simulation and compared with the timedomain differential demodulation(TDDD).The results indicate that the performance of FDDD is betterthan that of TDDD,and the lower band of BER in the former is lower than that of the latter.     

CFD在发芽罐空调系统节能改造中的应用研究

针对发芽罐空调系统能耗严重的问题,采用CFD软件Fluent模拟空调系统气流流道流场,通过添加导流板进行气流导流模拟改造。结果表明,气流导流可有效改善气流流场,增大风量或降低能耗,可提高空调系统风量17．9％,提高换热量18．8％,降低风机功耗12．5％,换热量增大6．7％;节能改造投资少、效益高。     

葡萄酒价格构成及其定价方法

中国市场上的葡萄酒产品价格一直为媒体所诟病,要正确认识这一问题就需要梳理葡萄酒价格的构成及其定价方法。文章通过简要介绍中国市场上的葡萄酒瓶装酒的成本构成因素,进而分析了葡萄酒生产企业及分销渠道成员所采取的定价策略,还试图得出葡萄酒产品在中国市场上的价格走势。     

构树韧皮的化学成分定量分析

对同一品种构树韧皮的化学成分进行了定量分析,结果表明构皮与其他韧皮类纤维原料的化学成分基本相同,但含量差别较大,纤维素含量为43.13%。     

Numerical investigation of fracture behavior of tunnel by excavation loading

A rock failure process analysis model, RFPA2D code, a two-dimensional numerical code, were proposed. The code not only satisfied the global equilibrium, strain consistent and nonlinear constitutive relationship of rock and soil materials but also took into account the heterogeneous characteristics of rock materials at macroscopic and microscopically level. The failure behavior of tunnel could be simulated by this numerical model. The model could realistically simulate the fracture behavior of tunnel by excavation loading, strength limits, and post peak response for both tension and compression. As the proposed method was used to conduct the stability analysis of tunnel, the safety factor of tunnel was defined as the ratio of actual shear strength parameter to critical failure shear strength parameter. Not only the safety factor of tunnel with specific physics meaning can be obtained, but also the overall failure process and the location of failure surface may also be determined at the same time.     

《采矿工程设计手册》有关力学计算的几处质疑

论文对《采矿工程设计手册》中有关几处力学计算提出质疑,如弯矩图的方向问题、水闸门的计算问题以及混凝土强度指标等问题.这些问题正确与否将影响工程的设计质量、工程质量、安全生产与经济效益,应引起人们重视.     

沸腾锅炉埋管防磨研究

本文针对燃烧煤矸石中温中压35吨/小时自然循环沸腾锅炉,分析主要蒸发受热面埋管在运行中磨损的因素,通过实践,确定在管外壁焊接材质为A 3钢的Φ12圆钢鳍片,是最为可行的一种方法。     

Mn、Co掺杂SiC薄膜结构与光致发光性能研究

采用射频磁控溅射技术和复合靶材方法制备了掺Mn,掺Co和Co、Mn共掺的SiC薄膜,经高温退火后进行了光致发光(PL)谱的测量,还用X射线衍射(XRD),傅立叶变换红外光谱(FTIR),扫描电镜(SEM)等表征手段分析了薄膜的相结构和表面形貌,并与光致发光的结果进行了对比研究.结果表明,掺Mn、Co使SiC晶格发生畸变,X射线衍射峰强度下降,Si-C吸收谱变宽,Si-C键振动减弱,Si-O基团的振动增强.样品在室温条件下均呈现出强的紫光发射特性,发光峰均位于414nm(3.0eV),认为414nm处的光致发光峰对应于光激发产生的电子从导带底到Si空位浅受主能级之间的辐射跃迁,其强度取决于Si空位的浓度.