基于MATLAB的低通FIR数字滤波器的滤波

应用窗函数法，同时借助于MATLAB程序设计语言对FIR DF进行了有效的设计，并附有源程序代码。     

光纤布拉格光栅的半金属管封装及挠度实验研究

本文提出了一种基于光纤布拉格光栅的半金属管封装方案 ,利用标准悬臂梁进行了挠度试验测量 .结果表明 ,用半金属管封装技术可以使光纤光栅感测的实验值更接近理论计算值 .封装后的实验测量值可达到理论值的94 %以上 ,FBG的挠度传感灵敏度约为± 0 .0 2 ,其对称性亦很好 ,线性拟合度分别达到 0 .995 8和 0 .9977.     

金霉素添加于鸡、鱼饲料的残毒研究

用不同剂量金霉素添加于肉鸡、鲫鱼日粮,连续投饲30～32日,进行病理解剖试验。逐只采取血液、肝脏、胸大肌、胸骨,制成血清或组织匀浆,用微生物法测定其组织金霉素残留量。试验结果显示:鱼各试验组,添加期及停药后各组织器官均未见明显病理性改变,且各组织亦无金霉素残留。鸡试验组可在添加期及停药次日检出0.003ppm,仅胸骨为0.032ppm。鸡组病理解剖试验所见心内膜出血及脂肪肝,试验组及对照组差异不显著。试验组小肠粘膜上的二种类型的出血点,分别随停药时间加长逐日减轻至消失或加章.对照组为前后变化不显著,需进一步探讨。     

洛阳盆地地下水人工调控试验研究

人工回灌试验使洛阳盆地大范围内地下水位升高，影响范围内供水井的采水量有不同程度增加，同时大大节省了提水用电。回灌试验监测资料分析表明，洛阳盆地是建设地下水库的良好场所，在洛河宽浅河道（部分切穿含水层）建设人工补给工程，增大河水补给地下水，是一种行之有效的措施，对确保洛阳盆地长远供水具有重要意义。     

光纤光栅与电阻应变片应变测量的对比分析

基于等强度标准梁应变实验,对光纤光栅与电阻应变片两种应变测量方法进行了实验对比,结果表明,光纤光栅方法应变测量数据的线性度、灵敏度与理论计算值符合得很好,光纤光栅方法测量应变是可行的、有效的。     

First-principle investigation on stability of Co-doped spinel λ-Mn4-xCoxO8

The mechanism of stability of Co-doped spinel λ-MnO2 that is referred to as spinel LixMn2O4 （x=0） was studied by using the first-principle calculation method. The total energy and formation enthalpy can be decreased remarkably due to the Co substation, resulting in a more stable structure ofλ-MnxCr2-xO4. The bond order and DOS analysis were given in detail to explain the nature of stability improvement. The calculated results show that as the content of Co dopant increases, the bond order of Mn-O becomes larger and the peak of density of states around Fermi level shifts toward lower energy. The charge density distribution illustrates that the Mn-O bonding is ionic and partially covalent, and the covalent Mn-O bonding becomes stronger with the increase of Co dopant content. The results confirm that the Co-doping will enhance the stability of λ-MnO2 and hence improve the electrochemistry performance of LixMn2O4.     

Syntheses and applications of Eu（Ⅲ） complexes of 2-thienyltrifluoroacetonate, terephthalic acid and phenanthroline as light conversion agents

A series of europium(Ⅲ) complexes of 2-thienyltrifluoroacetonate (HTTA), terephthalic acid (TPA) and phenanthroline (Phen) were synthesized. The new complexes Eu(TPA)(TTA)Phen and Eu2(TPA)(TTA)4Phen2 were characterized by elemental analysis, IR spectrum, scanning electron microscope and thermal stability analysis. The results show that the thermal stability of the Eu( Ⅲ ) complexes increases in the following order: the mononuclear complex Eu(TTA)3Phen, the binuclear complex Eu2(TPA)(TTA)4Phen2, the chain polynuclear complex Eu(TPA)(TTA)Phen. And the formation of the binuclear/polynuclear structure of the new complexes appears to be responsible for the enhancement of their thermal and optical stability. In addition, The fluorescence excitation spectra of these new complexes show more broad excitation bands than that of the complex Eu(TTA)3Phen corresponding to their formation. The enhancement of Eu3 fluorescence in the new complexes can be observed by the addition of Gd3 . The bright red luminescent plastics can be obtained when the complex EuGd(TPA)(TTA)4Phen2 is added above 0.5% (mass fraction).     

一种值得推广的施工：便桥钢管便桥

在道桥及水利工程施工中,因原有旧桥被拆除或施工现场附近无桥,为保证交通畅通和施工需要,就要在河流、渠道上架设便桥。这种施工便桥的架设,应当坚固可靠,绝对保证交通安全;要简易可行,尽量降低造价;还应省工省时,为主体工程施工赢得时间。目前,常用的施工便桥,有木便桥、钢桁架便桥、水泥管便桥及钢管便桥。木便桥,钢桁架便桥,虽然适应性强,但耗费大量木材、型钢,造价昂贵,且施工复杂,耗工费时,短时间内难以通车。水泥管自重大,需运输、吊装费用多;而且水泥管长度有限,需几根管联结使用,在软基河床上容易出现沉陷不     

梭式窑烧成全自动控制装置

近年来适应于多品种小批量生产形式的间歇式梭式窑，由于结构简单，建造费用低廉，窑内温差小及节省能源等优点，正在国内得到大规模普及。现在采用梭式窑可烧成日用瓷、艺术瓷、建陶、卫生洁具及电瓷各种产品。但由于迄今为止的陶瓷烧成过程中，几乎都是借凭肉眼观察及简单的仪表显示或经验进行操作管理，从而导致烧成管理无序或其它问题，影响到产品合格率，产品质量缺陷多，耗能较高及人工费用的增大。 近年来，欧美及日本陶瓷行业已普遍采用全自动控制梭式窑炉，成功地解决了上述问题，使烧成成本大幅度降低，产品利润率提高。为使梭式…     

磁州窑的兔崇拜和兔纹样

告别虎年，迎来兔年。按照中国传统的十二生肖学说，2011年是兔年。我国很久之前就有了兔崇拜，人们把兔归纳为有六德。