化
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This dissertation firstly introduces the principles of four kinds of simple gridding methods, which are"Linear interpolation based on triangulation","Inverse distance weighted and averaged method","Modified Shepard's method"and"Multiquardirc method". Secondly, it researches the Ordinary Kriging method for geophysical irregular data, which mainly includes the base knowledge of region change and variogram and the principle of Ordinary Kriging method. Thirdly, it researches the Inverse Interpolation for geophysical irregular data, which mainly includes the principle of inverse interpolation and its iterative algorithm, and the principle of Inverse Interpolation to realize the gridding of geophysical data. Finally, it uses these gridding methods to grid theoretical model data of potential field and raw aeromagnetic data, and compares and analyzes the gridding results.
本文首先简单介绍了地球物理不规则分布数据的四种简单网格化方法(即基于三角网的线性插值法、反距离加权平均法、改进的Shepard方法和多元二次函数法)的方法原理;接着,重点研究了地球物理不规则分布数据网格化的普通克里金法,主要研究了区域变化量、变差函数的基础知识和普通克里金法的方法原理;之后,重点研究了地球物理不规则分布数据网格化的反插值法,主要研究了反插值法的方法原理和迭代求解算法,以及反插值法实现地球物理数据网格化的原理;最后,应用这些方法对理论位场模型和实际航磁数据进行了试验、对比和分析。
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A selective and mild PS-DIB/ionic-liquid immobilized 2, 2, 6, 6-tetramethyl-piperidin-4-ol-N-oxyl catalytic oxidation procedure of alcohols to the corresponding aldehydes and ketones in ionic liquid BF4 at room temperature was developed. The oxidant PS-DIB was prepared via the iodation and acetylation of polystyrene resin. For the preparation of the ionic-liquid immobilized TeMPO catalyst, 4-(2, 2, 6, 6-Tetramethyl-1-oxyl-4-piperidoxyl)butyl bromide was first synthesized from TeMPO and 1, 4-dibromobutane.
将聚苯乙烯树脂先碘化再乙酰基化,制得了负载型二乙酰氧碘苯作为氧化剂。2, 2, 6, 6-四甲基-N-氧自由基哌啶醇与1, 4-二溴丁烷反应生成4-溴丁氧基-2, 2, 6, 6-四甲基-哌啶-1-氧化物,再与N-甲基咪唑发生季铵化反应,生成的溴化季铵盐与四氟硼酸钠进行离子交换制得氟硼酸型2, 2, 6, 6-四甲基-N-氧自由基哌啶负载离子液体。
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A selective and mild PS-DIB/ionic-liquid immobilized TEMPO catalytic oxidation procedure of alcohols to the corresponding aldehydes and ketones in ionic liquid BF4 at room temperature was developed. The oxidant PS-DIB was prepared via Iodation and acetylation of polystyrene resin. For the preparation of the ionic-liquid immobilized TEMPO catalyst, 4-(2,2,6,6-Tetramethyl-1-oxyl-4-piperidoxyl)butyl bromide was first synthesized from 2,2,6,6-tetramethyl-piperidin-4-ol-N-oxyl and 1,4-dibromobutane.
将聚苯乙烯树脂先碘化再乙酰基化,制得了负载型二乙酰氧碘苯(diacetoxyiodo polystyrene,PS-DIB)作为氧化剂。2,2,6,6-四甲基-N-氧自由基哌啶醇(2,2,6,6-tetramethyl-piperidin-4-ol-N-oxyl,TEMPO)与1,4-二溴丁烷反应生成4-溴丁氧基-2,2,6,6-四甲基-哌啶-1-氧化物,再与N-甲基咪唑发生季铵化反应,生成的溴化季铵盐与四氟硼酸钠进行离子交换制得氟硼酸型2,2,6,6-四甲基-N-氧自由基哌啶负载离子液体TEMPO-IL。
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Disseminated superficial actinic porokeratosis is an uncommon autosomal dominant chronic keratinization disorder, characterized by multiple superficial keratotic lesions surrounded by a slightly raised keratotic border.
播散性浅表性光线性汗孔角化症是一种以多个浅表的角化性皮损,边缘轻微嵴状角化性隆起为特征的少见的慢性角化性皮肤病,呈常染色体显性遗传。
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The on-line wheel dressing monitoring experiments were made to investigate the bispectrum feature of acoustic emission signals when the diamond sharpness ratio was sharp, middle blunt and blunt, and a diamond blunt feature extraction method based on main diagonal slic...
通过砂轮修整过程在线监测实验,分析了金刚笔在锐利、中等钝化和钝化状态下,修整过程中声发射信号的双谱特征,提出了归一化双谱模对角切片特征提取方法。研究表明,采用基于声发射的双谱分析方法可以有效监测砂轮修整过程中金刚笔的钝化状态。
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3D solid visualization class and 3D surface visualization class have thefunction of visualizing the scalar and vector. Moreover, 3D surface visualization classcan produce 2D data file. Picture class provides function of marking on the picture.
其次,运用 VTK 标量和矢量可视化技术实现了三维数据场的矢量和标量可视化,包括三维体数据场标量和矢量单视区显示及三维体数据场剖面标量和矢量单视区/四视区显示;使三维面数据可视化类具备了三维面数据场标量单视区显示功能和剖切面生成二维数据文件的功能,并且在三维面数据可视化类中内嵌了数据预处理算法。
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The three production methods of mesitylene,which include alkylation method,isomerization method, alkylation and isomerization combination method,are introduced in detail.
详细介绍了均三甲苯的三种生产方法(烷基化法、异构化法、异构化和烷基化联合法),评价了这些方法的优缺点。
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In this paper, the studies on the preparation of high pure mesitylene usingMTBE tail gas are made in both experimental and theoretical, different factorsaffecting the alkylation reaction to produce mesitylene by MTBE tail gas areinvestigated, the optimal condition of reaction is defined and the alkylationreaction kinetics of different components are studied, moreover, the comparisonbetween C4 raffinate oil and isobutene used for alkylation agent is made too.
本文对MTBE尾气烷基化法制备高纯度均三甲苯过程进行了实验研究和理论分析,确定了不同因素对烷基化反应的影响,得到了MTBE尾气制备均三甲苯的最佳反应条件,并对不同组分的烷基化反应动力学进行了研究。此外,对乙烯C4抽余油和异丁烯做为烷化剂的实验结果进行了分析和比较。
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The protoxylem vessels initiated lignification in the early stage of vascular bundle differentiation, whereas metaxylem vessels and fiber walls started lignification from the middle lamella and cell comers after completion of vascular bundle differentiation. The walls of most parenchyma cells lignified after the stem reached its full height, while a few parenchyma cells remained non-lignified even the culm is 7 years old.
研究结果表明:毛竹茎的原生木质部导管在维管束发育早期就已木质化;后生木质部导管和纤维细胞在维管束分化完成后,自胞间层和细胞角隅处开始木质化;基本薄壁组织细胞木质化的发生较晚,通常在茎的节间完成伸长生长后才开始,但也有少数薄壁组织细胞始终保持非木质化的薄壁状态。
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For the data set with noises, a regularization intropolation method is proposed according to regularization theory. The relation between the regularization intropolation method and radial basis function method is analysed and structure of regularization neural networks is proposed. RBF neural network is introduced by mortifying the regularization neural networks. Finally the approximation capacity of RBF neural networks is analysed. 4. A method of selecting the centers of hidden layer neurons of RBF neural networks is proposed.
首先从精确内插问题开始对RBF神经网络进行讨论,然后根据正则化理论提出了在数据集带有噪声的情况下的内插方法,并分析了这种内插方法和径向基函数方法之间的密切联系以及其对应的正则化神经网络结构,其次对正则化神经网络进行了修改,得到正则化神经网络的简化形式—RBF神经网络,最后分析了RBF神经网络的逼近性能。
- 推荐网络例句
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According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.
曝气设备的动力效率在叶轮转速为120rpm~150rpm时取得最大值,此时氧利用率和充氧能力也具有较高值。
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The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.
稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世,形体几无变化。
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When I was in school, the rabbi explained everythingin the Bible two different ways.
当我上学的时候,老师解释《圣经》用两种不同的方法。