查询词典 hankel transformation

Firstly, Vinyl ethers were prepared in a one-pot, two-step transformation by O-alkylation reaction of 2-hydroxyalkyl phenyl selenides with primary or secondary organic halides followed by oxidation-elimination with 30 % hydrogen peroxide.

1.2-羟基烷基苯基硒醚和伯、仲卤代烃通过O-烷基化反应，然后用30％的双氧水进行氧化消除反应，提供了&两步、一锅法&合成烯基醚的新方法，该方法反应条件温和，操作简便，产物收率中等到良好(70-85％)。

In this dissertation, preparation of polysubstituted ethene and heterocyclic compounds based on 2-hydroxyalkyl phenyl selenides andα-phenylselenopropionic acid reagents were further investigated as follow: Firstly, O-ethyl-O-vinyl phosphonates were prepared in a one-pot, two-step transformation by Mitsunobu reaction of 2-hydroxyalkyl phenyl selenides with monoethyl esters of phosphonic acid in the presence of diethyl azodicarboxylate and triphenyl phosphine (PPh3) followed by oxidation-eliminatio...

中文摘要：本文主要进一步探索了2-羟基烷基苯基硒醚、α-苯硒基丙酸试剂在制备多取代乙烯和杂环化合物反应中的应用，具体研究内容和结果如下：一、在偶氮二羧酸乙酯和三苯膦(PPh3)存在下，苯基-2-羟基烷基硒醚和O-乙基膦酸单酯发生Mitsunobu反应，无需分离和纯化反应中间体，直接使用30 %的双氧水进行氧化-消除反应，提供了&两步、一锅&合成O-乙基-O-乙烯基膦酸酯的新方法，该方法反应条件温和，操作简便，产物收率良好(76-82 %)。

High-temperature in-situ X-Ray diffracton analysis has been applied to study the dynamic phase transformation process of blue tungsten oxideW_(20 O_(58) and yellow tungsten oxide(WO_3) during H_2-reduction.

前言 作者曾对APT、不同相组成的蓝色氧化钨和wo3等原料在干氢气氛中还原的规律进行了研究''，忍'。

In this paper,Coal resources in the integration should focus on technology and management or personnel of integration ,Optimization of technological transformation program,Improved power supply systems.

本文提出，煤炭资源整合中应注重技术、管理、人才的整合，优化技改方案，完善供电等系统。

This paper reviews plant regeneration, genetic transformation and genetic improvement of carnation.

本文对香石竹的再生体系、遗传转化体系及其分子育种现状作了较为系统的总结。

In order to overcome the difficulties faced on analytically deriving the equation for describing the samll angle light scattering patterns from anisotropic objects with arbitrarily director configurations, a Fast Fourior Transformation algorithm for the calculation of SALS patterns from the anisotropic objects immersed in an isotropic matrix has been developed.

用快速傅里叶变换计算方法( Fast Fourier Transformation，FFT)直接获得高分子材料中介观有序结构小角激光光散射图案，从而对实验获得的球晶和液晶液滴的 SALS图案进行结构预测。

For solving complexity of this work,we hope RoMAS has a correct method which is designed for transforming analysis models to design models automatically,if transformation system is correct ,then analyst can get accurate executable code and get guarantee in design phase.

因此，我们设计了一套完整的转换机制，转换过程分为四个阶段，逐步说明如何转换分析阶段的角色、角色任务成为设计阶段的Agent、Agent行为和Agent的会话。

Role-based Modeling for MAS is a important synthetical methodology,this paper presents a integrated transformed-system,and develops the specific transformations that will use the Role Model and the Concurrent Mission Diagrams to generate the Agent Class Diagram, the Communication Class Diagrams for the conversations between the agent classes, and the agent behaviors that constitute the agents'internal architectures.we develop a tool to support the RoMAS method which implements the transformation of the model,and gives an example by using this tool.

本文同时设计并实现了基于ArgoUML的模型转换工具原型，该建模工具支持基于角色的多Agent系统开发方法的建模及模型转换，并结合一个实例演示模型转换过程。

He makes an impressive transformation, both physically, trading Ron's shaggy ginger locks for rockabilly slicked-back hair, and in his character.

他做出了一个令人印象深刻的蜕变，无论是外貌上（他将罗恩的一头蓬乱的红发变成了乡村摇滚歌星式的光滑的背头）还是在个性气质上都是。

Hen the coupling model of RIEMS and TOPX was still online tested in Jinghe basin. By means of the scale transformation scheme on topographic index and the yielding and runoff routing theory, the coupling model uses the meteorological data simulated by a regional climate model to drive the hydrological model for predicting the daily runoff at large-scale watershed.

OPX与RIEMS的耦合模式在泾河流域进行了在线测试，借助TOPX模型中的地形指数降尺度转换和水文过程产汇流机制，耦合模式实现了利用区域气候模式模拟的气象资料来驱动水文模型进行大尺度流域日径流量的模拟。

You can snipe the second and third union leaders from this position.

您可以鹬第二和第三工会领袖从这一立场出发。

Aiming at the currently shortage of XML streams quality detecting, this paper proposes a new forecasting method of XML streams quality by least squares support vector machines, which is used the method of XML keys' vector matrix as windows, and vector product wavelet transform to multilevel decompose and refactor the XML streams series, that can fulfill real-time checking demand of XML quality, and ensure constraint, consist- ency and integrality. For even more adapting net load, it proposes a control strategy by weight and adaptive adjustment to ensure XML streams quality.

针对当前XML数据流质量检测存在的不足，提出构建XML键的矢量矩阵作为窗口，利用矢量积小波变换多级分解与重构XML数据流，再结合最小二乘支持向量机对XML数据流质量进行预测的一种方法，满足XML数据流质量重构时实时检测的要求，保证XML数据的约束性、一致性与完整性；为了更好的适应网络负载，采取加权与自适应窗口调整等调度策略充分保证XML数据流的质量检测。