旋风预热器隔热防结皮复合涂层的研制

针对新型干法窑预热器系统存在的严重的结皮堵赛问题 ,研制了一种复合涂层 ,该涂层不仅具有优良的防结皮性能 ,而且还具有良好的隔热性能 ,成本也较低。     

资源一号02C星数据在土地利用分类中的应用

以资源一号02C星的2.36mHRC和10mMUX影像为数据源,根据试验区特点进行数据预处理,得到同时具有多光谱和高分辨率特征的影像,采用面向对象的分类方法进行土地利用分类,总结资源一号02C星的数据特点及应用潜力。结果显示:Pansharp融合法能有效保持02C影像的空间和光谱信息;面向对象的分类方法能充分利用02C高分辨率融合影像具有的丰富光谱、形状、纹理等特征信息,总体分类精度达到93.04%,Kappa系数达到0.89,结果优于传统基于像元的分类法。表明资源一号02C影像能较好地应用于土地利用宏观监测。     

内蒙古多伦县土地利用现状分析

利用 3S技术和 PCA,CLAUSTURE方法对多伦县土地利用现状和存在问题进行了分析 ,结果如下 :1 )多伦县土地利用结构充分反映其农牧交错地带的特征 ,草场、耕地、其它类土地 (以沙地为主 )以“三三制”构成 ,并且农耕地、沙地较多而林地较少 .2 )多伦县耕地中旱地占绝大多数 ,生产效率较低 .3)多伦县草场牲畜超载过牧严重 ,80 %发生了不同程度的退化 .4 )生态环境建设是多伦县今后工作的重点之一 ,它不仅关系到本地区的农牧业可持续发展 ,而且将为滦河上游水源地的保护起到积极的作用 .5)多伦县的地缘优势和资源优势为其下一步发展高效农牧业特别是高效畜牧业提供了可能     

Mo-Ni/γ-Al2O3甲烷化催化剂研究(Ⅱ)制备条件及还原条件对催化剂结构的影响

用程序升温还原 ( TPR)、程序升温脱附 ( TPD)、X射线粉末衍射 ( XRD)及透射电子显微镜 ( TEM)等法对分步浸渍法制备的一系列 Mo-Ni/ γ-Al2 O3甲烷化催化剂的结构进行了表征 .考察了浸渍液的 p H值、焙烧温度及还原温度对催化剂的表面结构的影响 .结果表明∶先浸 Mo时 ,调 ( NH4 ) 6Mo7O2 4 溶液的 p H=3、浸 Mo后 50 0℃焙烧的催化剂易于还原 ,而且能抑制后浸 Ni时 ,难还原铝酸盐的形成 ;浸 Ni时 ,调 Ni( NO3) 2 溶液的 p H=8,浸后 4 30℃焙烧的催化剂易于还原 ;浸 Mo后 ,650℃焙烧易形成难还原的 Al2 ( Mo O4 ) 3,浸 Ni后 530℃焙烧的催化剂易形成难还原的 Ni Al2 O4 与类 Ni Al2 O4 铝酸盐 .催化剂于 50 0℃还原时 ,还原态的 Ni最多 ,4 50℃还原时有利于 Mo-Ni合金的形成     

N-芳基二茂铁磺酰胺的合成及表征

为了制备具有生物活性的二茂铁衍生物,并和相应的苯系化合物比较,使二茂铁碘酰甩与芳香胺反应,合成了９个二茂铁磺酰胺,产率为５３．５％￣７９．１％,研究了芳香胺取代基对产率的影响。通过元素分析、红外光谱和＾１ＨＮＭＲ对产物进行了表征。     

铂电极对非电对离子Zn2+、Co2+、Ni2+的瞬时响应信号

用活度阶梯变化测量了铂电极对Ｚｎ＾２＋、Ｃｏ＾２＋、Ｎｉ＾２＋的瞬时响应信号,进一步证实了平衡时离子交换产物的摩尔分数Ｓｅｑ值对瞬时响应信号类型的影响。     

基于高效磨削的新型柔性砂轮研究

提出一种基于高效磨削的新型免修整型柔性砂轮。采用气囊式内胎和连接式弹簧环结构减少磨削中振动影响,便于控制砂轮表面砂带的张紧力。实验表明该砂轮具有高的磨削效率和精度。     

构筑济南绿地系统创建生态园林城市

以景观生态学原理为依据,剖析了济南市绿地建设的现状及存在的问题,提出了济南市城市绿化的思路与对策。     

Ferroelectric phase transition in relaxor ferroelectric single crystals 0.76PMN-0.24PT

The features of the single crystals 0.76PMN-0.24PT in dietectric, ferroetectric, pyroetectric properties and domain structures indicate that they are located between typical ferroetectrics and normal ones. The unpoled crystals present a transitional domain configuration between microdomains and typical macrodomains while the crystals on (001) cuts undergo fietd-induced phase transition under poling, showing two special temperature points T_d andT _m during the succedent heating procedure. The dietectric constant starts to decrease drastically at T_d during cooling, or the transformation from induced macrodomain to transitional domain takes place atT _d during heating. Ferroetectric-paraetectric phase transition or depolarization continues within the whole temperature range ofT _d-T _m, where ferroetectric phase in the form of transitional macrodomains coexists with paraetectric phase. Then the crystals macroscopically transoform into paraetectric phase containing ferroetectric microdomains at a temperature aboveT _m. However, owing to the influence of crystallite orientation on fietd-induced phase transition, the temperatureT _d does not appear in the same temperature-etectric fietd history in multicrystal ceramics with the same composition as the above single crystals.     

Discovery and demonstration of small circular DNA molecules derived from Chinese tomato yellow leaf curl virus

Tomato yetlow leaf curl viruses betong to Begomoviruses of geminiviruses. In this work, we first found and demonstrated that the small circular DNA molecules were derived from Chinese tomato yetlow leaf curl viruses (TYLCV-CHI). These small circular DNA molecules are about 1,3 kb, which are half the full-length of TYLCV-CHI DNA A. It was shown by sequence determination and analysis that there was unknown-origin sequence insertion in the middle of the small molecules. These sequences of unknown-origin were neither homologous to DNA A nor to DNA B, and were formed by recombination of virus DNA and plant DNA. Although various defective molecules contained different unknown-origin sequence insertion, all the molecules contained the intergenic region and part of the AC1 (Rep) gene. But they did not contain full ORF.