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Synthesis of N-Aryl-N’-（5-aryloxymethyl-1,3,4-thiadiazol-2-y1）ureas under Microwave Irradiation

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Synthesis of N-Aryl-N’-（5-aryloxymethyl-1,3,4-thiadiazol-2...

第三届全国有机化学学术会议

作者： chai, lan-qin ( College of Chemical Engineering , lanzhou Jiaotong University, lanzhou 730070 )

＜正＞ The rapid heating effect of microwave irradiation has caught the attention of synthetic chemists in the recent times due to the remarkable reduction of reaction time. It is an efficient method because of its virtue of rapid heating capability, high yield and simple procedure. The superiority of these virtues goes beyond of traditional heating reaction . Urea derivatives are widely used as medicines and agrochemicals because of their anticonvulsive, herbici dal, antiacetylcholinesterase,antineoplastic and hypotensive activities. Meanwhile, substituted 1,3,4-thiadiazoles have also attracted much attention due to their diverse biological activities, such as antimicrobial, antibacterial, anesthetic, anticonvulsant, cardiotonic, antiinflammatory and antiulcer activities. These appli-

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Synthesis of N-aryl-N'-(5-aryloxymethyl-1,3,4-thiadiazol-2-yl)ureas Under Microwave Irradiation

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Synthesis of N-aryl-N'-(5-aryloxymethyl-1,3,4-thiadiazol-2-y...

甘肃省化学会二十六届年会暨第八届中学化学教学经验交流会

作者： chai lan-qin,Yang Yu-Hua,Xu Li & Dong Wen-Kui~* School of Chemical and Biological Engineering,lanzhou Jiaotong University

The rapid heating effect of microwave irradiation has caught the attention of synthetic chemists in the recent times due to the remarkable reduction of reaction *** is an efficient method because of its virtue of rapid heating capability,high yield and simple *** superiority of these virtues goes beyond of traditional heating *** derivatives are widely used as medicines and agrochemicals because of

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Synthesis of Phenylallyl Substituted Unsymmetrical Ureas Under Microwave Irradiation

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Synthesis of Phenylallyl Substituted Unsymmetrical Ureas Und...

甘肃省化学会二十六届年会暨第八届中学化学教学经验交流会

作者： chai lan-qin,Xu Li,Yang Yu-Hua,Zhao Li & Dong Wen-Kui~* School of Chemical and Biological Engineering,lanzhou Jiaotong University

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Synthesis of Benzofuroyl Substituted Unsymmetrical Ureas under Microwave Irradiation

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Synthesis of Benzofuroyl Substituted Unsymmetrical Ureas und...

甘肃省化学会第二十七届年会暨第九届甘肃省中学化学教学经验交流会

作者： chai lan-qin~*,Zhang Yu-li,Cui Kai,Zhang Li-wen,Wang Zai-rui and Zhang Yong-ze School of Chemical and Biological Engineering,lanzhou Jiaotong University,730070

In recent years the use of microwave irradiation to promote reactions has received considerable attention and dramatic rate enhancements have been *** cyclization reactions yielding heterocycles under microwave irradiation have attached the attention of *** of such applications are the syntheses of unsymmetrically substituted *** ureas are widely used as herbicides,pesticides,plant growth regulators and medicinal *** bearing heterocyclic substitutents,for example 1,3,4-thiadiazole,have been shown to exert anti-inflammatory,anti-bacterial,and anti-convulsant activities.

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Synthesis of N-aryl-N'-(5-aryloxymethyl-1,3,4-thiadiazol-2-yl)-ureas Under Microwave Irradiation

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Synthesis of N-aryl-N'-(5-aryloxymethyl-1,3,4-thiadiazol-2-y...

甘肃省化学会第二十七届年会暨第九届甘肃省中学化学教学经验交流会

作者： chai lan-qin~*,Zhang Yu-li,Cui Kai,Wang Zai-rui,Zhang Yong-ze,Zhang Li-wen (School of Chemical and Biological Engineering,lanzhou Jiaotong University,730070)

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LightGCNet:基于轻量化卷积网络的深度色域压缩算法

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计算机科学与探索 2025年第1期19卷 196-210页

作者：杨晨徐昊朱佳伟吴秦柴志雷江南大学人工智能与计算机学院江苏无锡214122 江苏省模式识别与计算智能工程实验室江苏无锡214122

色域压缩是大色域向小色域进行转换时保持色彩信息的关键技术。经典算法虽计算快速,但处理结果缺乏细节且没有考虑人眼的感知特性,难以满足人们对色彩品质不断提升的要求。迭代算法处理效果更佳,但极其耗时,无法投入实际应用。针对上述... 详细信息

色域压缩是大色域向小色域进行转换时保持色彩信息的关键技术。经典算法虽计算快速,但处理结果缺乏细节且没有考虑人眼的感知特性,难以满足人们对色彩品质不断提升的要求。迭代算法处理效果更佳,但极其耗时,无法投入实际应用。针对上述问题,提出了轻量化的深度色域压缩方法,该方法可在逼近迭代算法计算效果的同时保持接近经典算法的速度。为色域压缩算法设计了LightGCNet模型,该网络中的双层卷积由DSC与DW卷积组合而成,相比常规U-Net,参数量与计算复杂度急剧降低。为进一步提高模型先验性,将预训练得到的DW卷积中多个核通道进行重聚焦操作以建立联系,最终权重由重聚焦权重和预训练权重组成。针对色相、明度、彩度这三个色彩属性,设计了色域压缩专用的损失函数。该函数不仅考虑了像素级损失,而且融合了图像感知损失,并联合色彩属性的多尺度信息进行加权,解决了深度色域压缩过程中细节丢失的问题。基于迭代算法生成标签以训练网络,联合学习目标色域特征与图像信息,实现了与迭代算法相当的效果。实验结果表明:该方法与业界经典的SGCK算法相比,iCID值降低了17.08%,SSIM值提高了5.30%。相比常规U-Net模型,LightGCNet参数量减少了82.96%,乘加次数从8.5GFLOPs大幅下降至2.2GFLOPs,使改良模型更适于低端设备部署。该模型在CPU上处理单幅512×512图像仅需0.208s,计算时间比迭代类算法减少99.92%。

关键词：色域压缩轻量化深度学习色彩管理

1-(2-萘氧乙酰基)-4-芳杂环取代氨基脲的合成与表征

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兰州交通大学学报 2011年第6期30卷 157-160页

作者：柴兰琴崔凯张玉丽王再蕊张永泽兰州交通大学化学与生物工程学院甘肃兰州730070

以芳杂环取代酸为原料,用Curtius重排的方法合成异氰酸酯,直接与2-萘氧乙酰肼作用,一锅法合成了4种1-(2-萘氧乙酰基)-4-取代芳杂环氨基脲类化合物.该方法具有原料易得、操作简便、无需分离中间体等优点.目标产物的结构经元素分析、IR及1... 详细信息

以芳杂环取代酸为原料,用Curtius重排的方法合成异氰酸酯,直接与2-萘氧乙酰肼作用,一锅法合成了4种1-(2-萘氧乙酰基)-4-取代芳杂环氨基脲类化合物.该方法具有原料易得、操作简便、无需分离中间体等优点.目标产物的结构经元素分析、IR及1 H NMR得到了确证.

关键词：芳杂环氨基脲 Curtius重排异氰酸酯合成

A combined DFT and molecular dynamics study of U(Ⅵ)/calcite interaction in aqueous solution

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Science Bulletin 2017年第15期62卷 1064-1073页

作者： Jian-Hui lan Zhi-Fang chai Wei-Qun Shi Laboratory of Nuclear Energy Chemistry and Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety Institute of High Energy Physics Chinese Academy of Sciences Beijing 100049 China School of Radiological and Interdisciplinary Sciences (RAD-X) and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions Soochow University Suzhou 215123 China

Here we present a combined DFF and molecular dynamics study of uranyl （U（VI）） interaction mecha- nisms with the calcite （104） surface in aqueous solution. The roles of three anion ligands （CO2 , HCO3, OH ） and solvation effect in U（VI） interaction with calcite have been evaluated. According to our calculations, water adsorbed on the calcite （104） surface prefers to exist in molecular state rather than dis- sociative state. Energy analysis indicate that the positively charged uranyl species prefers to form surface complexes on the surface, while neutral uranyl species may bind with the surface via both surface complexing and ion exchange reactions of U（VI） → Ca（II）. In contrast, the negatively charged uranyl species prefer to interact with the surface via ion exchange reactions of U（VI）→ Ca（II）, and the one with UO2（CO3）2（H2O）^2- as the reactant becomes the most favorable one in energy. We also found that uranyl adsorption increases the hydrophilicability of the （104） surface to different extents, where the UO2（CO3）3Ca2 species contributes to the largest degree of energy changes （ 53 kcal/mol）. Our calcula- tions proved that the （104） surface also has the ability to immobilize U（VI） via either surface complexing or ion exchange mechanisms under different pH values.

关键词： Uranyl Incorporation Adsorption Calcite Density functional theory Molecular dynamics

New Family of 3-DOF UP-Equivalent Parallel Mechanisms with High Rotational Capability

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Chinese Journal of Mechanical Engineering 2018年第1期31卷 66-77页

作者： Wei Ye qin-Chuan Li Xin-Xue chai Faculty of Mechanical Engineering and Automation Zhejiang Sci-Tech University

Parallel mechanisms(PMs) having the same motion characteristic with a UP kinematic chain(U denotes a universal joint, and P denotes a prismatic joint) are called UP-equivalent PMs. They can be used in many applications, such as machining and milling. However, the existing UP-equivalent PMs suffer from the disadvantages of strict assembly requirements and limited rotational capability. Type synthesis of UP-equivalent PMs with high rotational capability is *** special 2 R1 T motion is briefly discussed and the fact that the parallel module of the Exechon robot is not a UP-equivalent PM is disclosed. Using the Lie group theory, the kinematic bonds of limb chains and their mechanical generators are presented. Structural conditions for constructing such UP-equivalent PMs are proposed,which results in numerous new architectures of UP-equivalent PMs. The high rotational capability of the synthesized mechanisms is illustrated by an example. The advantages of no strict assembly requirements and high rotational capability of the newly developed PMs will facilitate their applications in the manufacturing industry.

关键词： Parallel mechanism Group theory Type synthesis High rotational capability