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The morphologies and microstructures of the cathode deposits prepared by self-sustained arc discharge between graphite rods under different conditions were investigated by means of SEM and TEM,and the relationship between the morphologies and microstructures of the carbon nanotubes and the different conditions of arc discharge was obtained.

通过实现不同条件下的电弧放电,用扫描电子显微镜和透射电子显微镜对阴极沉积物中碳管的形貌和微结构进行表征,得到碳管的形貌和微结构与放电条件之间的一些对应关系。

The arcs which are joined in the same node are ordered by means of bina sorting tree, and the minimal polygons are built by the right sequence of arcs, then polygon overlaying is finished.

通过在无拓扑矢量数据中局部引入拓扑关系,对同一结点连接的弧段,采用二叉树方法进行排序,构建最小多边形,完成无拓扑信息的矢量图形的重组,并对新算法与已有算法的结构进行了对比。

Local topological information is imported to the altered polygon in this new algorithm.The arcs which are joined in the same node are ordered by means of bina sorting tree,and the minimal polygons are built by the right sequence of arcs,then polygon overlaying is finished.

通过在无拓扑矢量数据中局部引入拓扑关系,对同一结点连接的弧段,采用二叉树方法进行排序,构建最小多边形,完成无拓扑信息的矢量图形的重组,并对新算法与已有算法的结构进行了对比。

F. pumila had the strongest capacity to adhere to walls, and it formed a quite good covering landscape by means of a large quantity of adventitious roots. Furthermore, it was tolerant to shade, and the effects of shading on its growth and landscape covering were very small. P. heterophylla had the rapidest growth and covering speed, and it adhered to walls by adhesive discs, but was defoliated in winter or after a long period of shading. The other three vines climbed walls using adventitious roots, and their adhering capacities were all relatively poor. However, E. fortunei still formed a relatively good covering due to its rapid growth and emerald leaf colour. After shading for four months, leaves of F, pumila, C. grandiflora, and P. serpens became thin, and accordingly their leaf weight per unit area significantly decreased. Shading also reduced chlorophyll contents of C. grandiflora and E. fortunei but enhanced those of F. pumila and P. serpens, It did not influence leaf thickness, leaf weight or chlorophyll content of P. heterophylla. Whether shaded or not, the relationship between Pn and PAR for each species could be expressed as y=alnx+b, and furthermore there was a significant (P.01) correlation between them. Pn and LCP values for all five lianas also significant (P.01) correlated. Shading reduced LCP values of P. heterophylla, C. grandiflora and E. fortunei but increased LSP of F. pumila.

结果表明,1薛荔对墙体附着力最强,它依靠大量的不定根吸固在墙体上,形成很好的覆盖效果,而且薜荔耐荫,遮光对其生长与覆盖的影响很小;爬墙虎的生长与覆盖速度最快,它主要依靠吸盘吸固墙壁,但在冬季或长时间遮光后出现明显落叶现象,影响其覆盖景观;其他3种都依靠不定根沿墙面攀援,附着力相对较差,但扶芳藤由于生长较快,叶色终年保持翠绿,也能形成相对较好的覆盖效果;2遮光4个月后,薛荔、凌霄和蔓九节的叶片变薄,相应地这3种植物单位面积的叶片重量都显著减轻;遮光还使凌霄和扶芳藤的叶绿素含量减少,使薛荔和蔓九节的增加,但对爬墙虎的叶片厚度、叶重和叶绿素含量都不产生明显影响;3无论遮光与否,5种植物的Pn与PAR之间的关系都可用y=alnx+b表示,并且都达极显著相关,Pn与光补偿点之间亦呈极显著相关;遮光还使爬墙虎、凌霄和扶芳藤的LCP下降,并使薛荔的光饱和点升高。

The general design framework for PTIDS and its systematic architecture are put forward by means of systematic engineering method in this paper. The transmission capability is studied by making use of following model. The comparison between a practical transmission capability measurement of a road in Beijing and the theoretical result verifies research bound of following model, also its applicable condition, which provides essential technical setout for intelligent dispatch management of PTV.

1运用系统工程研究方法,提出了公交车辆智能指挥调度总体框架及其体系结构,采用跟驰模型理论进行了路段通行能力分析研究,并结合实际测量统计分析了北京市区某路段道路通行能力与理论计算进行了分析比较,验证了跟驰模型所涉及的研究范围及适用环境,为公交车辆智能化运营调度管理提供了必要的技术数据和准备。

It is at least foolish to assume such disproportion, or to attempt to prove it by artificial calculations or sophistical arguments, so long as on the globe a mass of natural forces still lies inert by means of which ten times or perhaps a hundred times more people than are now living can be sustained.

世界上还有大量的天然富源没有开发,人口就是再增十倍或甚至百倍也足以供应;情况既然是这样,这种食料与人口两者不能相平的想法,或者用假想的计算、诡谲的论据来证明这种臆说的办法,可以说至少是愚昧的。

The antimony doped tin oxide nanoparticles were synthesized at 240℃for 17 h by the complexing hydrothermal oxidation method using stannate, antimony white and sulphuric acid as the starting materials, sodium hydrotartrate as the complexing agent and hydrogen peroxide as the oxidant. The resulting powders were characterized by means of differential thermal analysis, infrared spectrometry, X-ray diffraction and transmission electron microscope. The mechanism of the preparation of ATO powder was investigated as well.

摘 要:以锡酸钠、锑白和硫酸为原料,酒石酸氢钠为配合剂,双氧水为氧化剂,采用配合水热氧化法在水热氧化温度为240℃和水热保温时间为17 h时,合成单分散性的蓝色锑掺杂二氧化锡粉末,用差热分析、红外光谱、X射线衍射和透射电镜对所制得的粉末进行表征,并对ATO纳米粉体的配合水热氧化合成机理进行探讨。

The antimony-doped tin oxide nanoparticles were synthesized at 240℃ for 17h by the complexing-hydrothermal oxidation method using stannate, antimony white and sulphuric acid as the starting materials, sodium hydrotartrate as the complexing agent and hydrogen peroxide as the oxidant. The resulting powders were characterized by means of differential thermal analysis, infrared spectrometry, X-ray diffraction and transmission electron microscope. The mechanism of the preparation of ATO powder was investigated as well.

以锡酸钠、锑白和硫酸为原料,酒石酸氢钠为配合剂,双氧水为氧化剂,采用配合-水热氧化法在水热氧化温度为240℃和水热保温时间为17h时,合成单分散性的蓝色锑掺杂二氧化锡粉末,用差热分析、红外光谱、X射线衍射和透射电镜对所制得的粉末进行表征,并对ATO纳米粉体的配合-水热氧化合成机理进行探讨。

The author learn that the curriculum in kindergarten stray away from the real life in the way of a field research by observing in a few kindergartens and by means of analyzing text. There are some examples such as ignoring the educational values of the daily life activities; the curriculum"s divorcing from the children"s life experience and so on. At the same time, the author finds that there are some good examples for the curriculums closely relating to the real life, so we say that it is possible for the curriculum in kindergarten to come back to life.

通过对幼儿园的实地观察以及对文本的分析,笔者认为幼儿园课程存在与生活背离的现象,如忽视日常生活活动的教育价值,课程内容脱离幼儿生活经验等;同时也存在与生活紧密联系的课程范例,所以,幼儿园课程回归生活是可能的。

By means of this function, a stream diagram may be drawn, by which we may discus and analyze the effectiveness of thermodynamic cycles-A Method of Second-Law Analysis.

这种方法可把各类热力机械的效率指标統一起来,便于分析现代綜合的热力循环,对能量的合理利用提供了理論上的依据。

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In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是,在否定句或疑问句里,这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷

Nusa lembongan : Bali's sister island, coral and sand beaches, crystal clear water, surfing.

Nusa Dua :豪华度假村,冲浪和潜水,沙滩,水晶般晶莹剔透的水,网络冲浪。