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We prepared the ordered porous alumina membrane by a two-step anodization method in oxalic or sulfuric acids, which is a self-ordered hexagonal array of cells with an adjustable pore diameter of 20-150nm and a different pore structures (i.e. Y-branched, dendriform, toothed and torous ones). Furthermore, the template-electrodeposition, vapor-catalytic growth, and controlled chemical etching were developed for well-aligned carbon nanotubes and oxide nanopillars with adjustable diameter, Al2O3-AlN one-dimensional heterojunction, Y-junction and dendriform metal nanowires, as well as Y-junction, and torous carbon nanotubes. The resultant one-dimensional junctions were characterized by XRD, SEM, TEM,HRTEM, and STM, and the field emission of the well-aligned carbon nanotubes and the luminescence of ZnO nanopillar array have also been mearsured.

完善和发展了阳极腐蚀法制备多孔氧化铝膜的方法,制备出了孔径在20-150nm之间可调和具有不同孔结构(如Y形、树枝状、锯齿状)的系列多孔氧化铝模板,在此基础上,利用电化学沉积、气相催化生长和化学控制腐蚀等方法,成功地生长出具有可调直径的碳纳米管和氧化物纳米柱有序阵列、Al2O3-AlN异质结纳米线、Y形和树枝状的金属纳米线以及Y形、藕节形和锯齿形的碳纳米管等多种一维结纳米材料及其阵列体系,探索了基于模板孔壁内沿生长一维结纳米材料的机制,较系统的研究了碳纳米管阵列的场发射性能和氧化锌纳米柱的发光性能,为低维纳米材料器件化提供了实验基础。

The result proves that not only the grinding wheel's cost is lower, but also the effect is better than ordinary wheel in hardness, strength density and metallograph. The wheel has good abilitg of keeping grinding material and good grinding property. It can satisfy reguest of ELID grinding technology for wheel's selectrolytic and forming film. It is an ideal, practical and special grinding wheel of ELID grinding.

实际应用结果表明,该砂轮成本低、效果好,在硬度、强度、密度、组织等物理性能方面较商品砂轮有较大提高,并具有很好的把持磨料的能力和良好的磨削性能,充分满足ELID磨削技术对砂轮电解生膜的要求,是一种较为理想的实用的ELID磨削专用砂轮。

JIASHAN SHB OILLESS BEARING FACTORY is a the Professional design、 made and sales self-lubricating bearing company. we are always depend on mature technic, advanced equipment, perfect art and inspectartifice, manfacture the self-lubricating bearing suit for kinds of operating condition, the products:SF oilless bearing、JF bimetal bearing、JDB solid lubricant embedded bearing、FB bronze bearing, etc. It is widely applied to bus industry、buliding engineering machine、water conservancy machine、plastic machine printing packing machine and need drive or without oil or with little oil form lubrication.

嘉善三和无油润滑轴承厂是一家专业设计、制造和销售自润滑轴承的新兴企业,我们一直依靠成熟的技术,先进的设备,完善的工艺和检验手段,生产出适合于各种工况条件下的自润滑轴承,产品主要有:SF型复合系列无油轴承、JF型系列双金属轴承、JDB型系列固体镶嵌自润滑轴承、FB青铜轴承等,被广泛应用于汽机车行业、建筑工程机械、水利机械、塑胶机械、印刷包装机械等需要传动而无法加油或较难形成油膜的部位。

Compared with non-nanopolyaniline synthesized by conventional emulsion polymerization, nanopolyaniline has the narrow and uniform distribution of particle dimension and the diameter of particle is about 4-5nm,and the conductivity reaches 3.2S·cm-1, which is more than 100 times higher than that of nanopolyaniline;Moreover, it has higher solubility in conventional solvent and the solubility reaches 95% in N-methyl pyrrolidone;what's more ,it has higher crystallinity and more uniform crystal proved by XRD, apparent blue shift indicated by UV, which makes it possible to prepare transparent conductive composite films.

结果表明,微乳液法合成的纳米聚苯胺与常规乳液法合成的非纳米聚苯胺相比,具有明显的优越性:粒径分布窄,95%的在10nm 以下,最大的不超过30nm;电导率较高,达到了3.2S/cm,提高了2 个数量级以上;在有机溶剂中的溶解度较高,其中在N-甲基吡咯烷酮中的溶解率达到了95%;X 射线衍射仪分析表明,纳米聚苯胺结晶度高,晶型更为规整;紫外可见光谱研究发现,纳米聚苯胺在可见光区有明显的蓝移,为制备透明的导电复合膜提供了可能。

Spikelets with 1 floret, mostly laterally compressed, rachilla extension absent, falling entire; glumes absent or reduced to small scales at base of floret; lemma membranous to leathery, keeled, 5–10-veined, entire, with or without a straight awn from the apex; palea resembling lemma but narrower, 3–7-veined with central keel.

小穗具1小花,多数侧面压扁,小穗轴扩展无,变为全缘;颖片小花的无的或退化至小鳞片在基部;外稃膜的到革质,翻转,5-10脉,整个,有或没有来自顶的一直的芒;内稃象外稃但是狭窄,3-7脉与中心的龙骨一起。

Based on the laser longitudinal mode splitting theory, a novel scheme of dual-frequency laser with large frequency-difference is presented using electrically controlled birefringence of liquid crystal, and the transmitted resonant mode splitting by birefringent of Fabry-Perot etalon has been analyzed theoretically. A new element of liquid crystal Fabry-Perot etalon is designed and fabricated, which serves as aselector and splitter of both laser longitudinal modes and Fabry-Perot etalons transmitted resonant modes. Two different experimental systems of laser-diode end-pumped Nd:YAG laser have been set up using two different LDs, and the transmission of liquid-crystal cell have been measured. When the empty LCFP is inserted in the cavity of high-power LD pumped Nd:YAG laser, the oscillation of a single laser longitudinal mode have been observed, such a result shows that the designed and fabricated LCFP element is capable of selecting single axial mode. While an anti-reflected liquid crystal cell is inserted in the cavity of Nd:YAG laser end-pumped by the high-power LD, it is difficult to confirm weather the laser longitudinal modes have been spitted or not. The subject is summarized in this thesis and the improvement of the project has been presented.

论文以激光纵模的分裂理论为基础,提出了可望获得几十GHz甚至上百GHz的液晶电控双折射双频Nd:YAG激光器的总体方案,并对用双折射效应分裂F-P标准具透射谐振模进行了理论分析;设计并加工了一种集激光纵模选择、激光纵模分裂和F-P标准具谐振透射模分裂于一体的多功能元件——液晶电控双折射F-P标准具;建立了两种不同功率激光二极管端面泵浦的Nd:YAG激光实验系统,并对液晶盒的透射性质进行了测试;将未灌注液晶的空液晶F-P摘要标准具插入大功率LD泵浦Nd:、叭G激光谐振腔内,观察到了单纵模激光输出,说明所设计和加工的液晶F一P标准具具有纵模选择能力;将镀有增透膜的液晶盒插入大功率LD泵浦Nd八7AG激光谐振腔内,是否产生了激光纵模分裂现象还难以确定。

Using a dedicated high-precision polishing machine will be take high-tech nano-anti-fouling agents dripping polished surface, through repeated pressure grinding head polishing rinding ,polishing let's anti-fouling agents to be better to penetrate into the pores polished internal completely blocked pores polished and micro-cracks, to become the special, continuous nano-membrane, so that polished surface to prevent invasion of the functions of all pollutants, stains with the clean water can touch off; At the same time ,higher gloss, reached 90 degrees Celsius, and has the following outstanding performance

采用一种专用的高精度抛光机将高科技纳米防污剂滴到抛光砖的表面,通过抛光磨头的反复施压,打磨,抛光,将防污剂更好地渗透到抛光砖的毛孔内部,完全堵塞了抛光砖的毛孔及微裂纹,形成一种特殊的,连续的纳米膜,从而是抛光砖表面具有阻止一切污染物入侵的功能,污渍用水一抹就干净;同时光泽度更高,达到90度以上,并具有以下有一的性能

In the case of film condensation, the total heat transfer coefficient of B30 circularly-grooved tube can increase 44%~ 95% compared with smooth tube; for TA2 circularly-grooved tube, it is 51%~64%. And the relevant flow friction inside the tube obviously increases.

在膜状凝结条件下,B30波槽管的总传热系数比光管的提高44%~95%;TA2波槽管的总传热系数比光管的提高51%~64%;而相应的管内冷却水流动阻力也有明显的增加。

The method avoids loose and porous hydrotalcite thin film by traditional chemical conversion method and powder coating method, and has such advantages as simple process and mild synthesis conditions. The obtained hydrotalcite thin film has excellent anticorrosive performance, and can improve the anticorrosive performance of Mg alloy.

本发明避免了传统的化学转化法和粉体涂覆法得到的水滑石薄膜结构疏松多孔的问题,且工艺简便,合成条件温和,比传统的水滑石膜层更具有优良的抗蚀性能,可以提高镁合金的耐腐蚀性能。

We hypothesize that a transition from lysines to arginines such as that observed in tunicates (30), in conjunction with a loss of the core region, could have resulted in the differentiation of the arginine-rich protamines of the P type.

我们假定从离氨酸到 arginines 的一个转变如此的当做观察在有被膜的(30),连同核心区域的一个损失,可能造成 arginine 的区别-p 类型的富有 protamines。

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The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应,而且减少跟风的可能性。

The new PS20 solar power tower collected sunlight through mirrors known as "heliostats" to produce steam that is converted into electricity by a turbine in Sanlucar la Mayor, Spain, Wednesday.

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