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1D Fe3O4@CuSiO3 composites catalyzed decarboxylative A^3-coupling for propargylamine synthesis

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Chinese Chemical Letters 2020年第6期31卷 1558-1563页

作者： Fang Wang Huangdi Feng Huiqiong Li teng miao Tiantian Cao Min Zhang College of Chemistry and Chemical Engineering Shanghai University of Engineering ScienceShanghai 201620China

Highly active and stable magnetic copper catalysts were successfully achieved by magnetic induced Stober method and subsequent hydrothermal reaction with copper ions in alkaline *** high content of Cu2+as well as the unique structures of hierarchical copper silicate in the as-prepared catalysts endowed their outstanding catalytic *** decarboxylative A3-coupling of a-keto acid,amine and alkyne was realized with the low Fe3 O4@CuSiO3 loading.A range of propargylamines were produced in good to excellent yields under solvent-free ***,the catalyst can be easily separated from the final organic product with an external ***,this kind of catalyst could be recycled up to six times while maintaining its activity.

关键词： Magnetic copper catalyst Heterogeneous catalysis One-dimensional Decarboxylative coupling Propargylamines

An interactive design method for realistic fruit rot modeling and simulation

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International Journal of Modeling, Simulation, and Scientific Computing 2018年第5期9卷 45-58页

作者： Sheng Wu Boxiang Xiao teng miao Weiliang Wen Xinyu Guo Beijing Research Center for Information Technology in Agriculture Beijing 100097 P.R.China Beijing Academy of Agriculture and Forestry Science Beijing 100097 P.R.China Beijing Key Lab of Digital Plant Beijing 100097 P.R.China

This paper presents a general 3D method to simulate a rotting process in fruits using a visual model for the digital design of the *** global rot parameter and rot resistance parameter are used to control a dynamic simulation of a rotting *** rot resistance parameters of every point of a 3D fruit model are generated by an interactive designing method that is similar to the traditional sketch drawing *** construct a texture of a rot region on a fruit surface by resistance *** degree of rot that is used to control both shape and appearance of rotten fruit surface can be computed by tuning the resistance parameters and global rot *** derive an exponential function to calculate the depression displacement of geometric shape caused by the *** order to render a wrinkle on the rot region,we use a normal noise map to modify a normal vector of fruit model and use an isotropic ward BRDF model to represent an appearance of fruit in which the time-varying diffuse reflectance is derived from the real *** utilize a linear function to control the dynamic simulation processes including shape deformation and aging *** have evaluated our method by simulating the rotten apple and moldy *** results have shown that our method provides a dynamic,real-time and realistic simulation,and it is flexible,fast and of a general character for digital fruit design as a visualization model.

关键词： Digital design fruit rot rot deformation BRDF.

Reversible CO_(2)-, Photo-and Thermo-Triple Responsive Supramolecular Chirality of Azo-containing Block Copolymer Assemblies Prepared by Polymerization-induced Chiral Self-assembly

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Chinese Journal of Polymer Science 2022年第1期40卷 56-66页

作者： Ya-Jing Sun Xiao-Xiao Cheng teng-Fei miao Hao-Tian Ma Wei Zhang Xiu-Lin Zhu Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application State and Local Joint Engineering Laboratory for Novel Functional Polymeric MaterialsCollege of ChemistryChemical Engineering and Materials ScienceSoochow UniversitySuzhou Industrial ParkSuzhou 215123China

Polymerization-induced chiral self-assembly(PICSA)is an efficient strategy that not only allows the construction of the supramolecular chiral assemblies in a controlled manner but also can regulate the morphology in ***,a series of azobenzene-containing block copolymer(Azo-BCP)assemblies with tunable morphologies and supramolecular chirality were obtained through the PICSA *** supramolecular chirality of Azo-BCP assemblies could be regulated by carbon dioxide(CO_(2))stimulus,and completely recovered by bubbling with Ar.A reversible morphology transformation and chiroptical switching process could also be achieved by the alternative 365 nm UV light irradiation and heatingcooling ***,the supramolecular chirality is thermo-responsive and a reversible chiral-achiral switching was successfully realized,which can be reversibly repeated for at least five *** work provides a feasible strategy for constructing triple stimuli-responsive supramolecular chiral nano-objects in situ.

关键词： Supramolecular chirality Polymerization-induced self-assembly Azobenzene CO_(2)responsiveness

Construction of Chiroptical Switch on Silica Nanopartide Surface via Chiral Self-assembly of Side-chain Azobenzene-containing Polymer

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Chinese Journal of Polymer Science 2021年第12期39卷 1528-1537页

作者： Guang-Xing Song teng-Fei miao Xiao-Xiao Cheng Hao-Tian Ma Zi-Xiang He Wei Zhang Zheng-Biao Zhang Xiu-Lin Zhu Suzhou Key Laboratory of Macromolecular Design and Precision Synthesis Jiangsu Key Laboratory of Advanced Functional Polymer Design and ApplicationState and Local Joint Engineering Laboratory for Novel Functional Polymeric MaterialsCollege of ChemistryChemical Engineering and Materials ScienceSoochow UniversitySuzhou Industrial ParkSuzhou 215123China

In this contribution,we utilized surface initiated atom transfer radical polymerization(SI-ATRP)to prepare organicinorganic hybrid core/shell silila nanoparticles(NPs),where silia particles acted as cores and polymeric shells(PAzoMA*)were attached to silica particles via covalent ***,chiroptical switch was sccessfully constructed on silica NPs surface taking advantage of supramolecular chiral self-assembly of the grafted side chain Azo-containing polymer(PAzoMA*).We found that the supramolecular chirality was highly dependent on the molecular weight of grafted PAzoMA*.Meanwhile,the supramolecular chirality could be regulated using 365 nm UV light iradiation and heating cooling treatment,and a reversible supramolecular chiroptical switch could be repeated for over five cycles on silia NPs ***,when heated above the glass transition temperature(T_(g))of PAzoMA",the organic-inorganic hybrid nanoparticles(SiO_(2)@PAzoMA*NPs)still exhibited intense DRCD ***,the supramolecular chirality could be retained in solid film for more than 3 *** conclude,we have prepared an organic inorganic hybrid core/shell chiral slia nanomaterial with dynamic reversible chirality,thermal stability and chiral storage functions,providing potential applications in dynamic asymmetric catalysis,chiral separation and so on.

关键词： Silia nanopartides Chiroptical switch Supramolecular chiral assembly Azo containing polymer

Efficacy of Huangma Ding or autologous platelet-rich gel for the diabetic lower extremity arterial disease patients with foot ulcers

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World Journal of Diabetes 2024年第5期15卷 923-934页

作者： Xue-Qin Wang Dan-Lan Pu Wei-Ling Leng Xiao-Tian Lei Jiang Juan Zou La Ding Yao Jia-Zhuang Xi Li Jian teng miao Qi-Nan Wu Endocrinology Department The People’s Hospital of Yubei District of Chongqing CityChongqing 401120China Department of Endocrinology Chongqing Yubei District People’s HospitalChongqing 400030China Endocrinology Department The First Affiliated Hospital of the Army Medical UniversityChongqing 400038China Endocrinology and Nephrology Department Chongqing University Cancer Hospital and Chongqing Cancer Institute and Chongqing Cancer HospitalChongqing 400016China Department of Endocrinology Dazu Hospital of Chongqing Medical UniversityThe People’s Hospital of DazuChongqing 402360China

BACKGROUND Diabetes foot is one of the most serious complications of diabetes and an important cause of death and disability,traditional treatment has poor efficacy and there is an urgent need to develop a practical treatment *** To investigate whether Huangma Ding or autologous platelet-rich gel(APG)treatment would benefit diabetic lower extremity arterial disease(LEAD)patients with foot *** A total of 155 diabetic LEAD patients with foot ulcers were enrolled and divided into three groups:Group A(62 patients;basal treatment),Group B(38 patients;basal treatment and APG),and Group C(55 patients;basal treatment and Huangma Ding).All patients underwent routine follow-up visits for six *** follow-up,we calculated the changes in all variables from baseline and determined the differences between groups and the relationships between *** The infection status of the three groups before treatment was the ***(PCT)improved after APG and Huangma Ding treatment more than after traditional treatment and was significantly greater in Group C than in Group *** regression analysis revealed that PCT was positively correlated with total amputation,primary amputation,and minor amputation *** ankle-brachial pressure and the transcutaneous oxygen pressure in Groups B and C were greater than those in Group *** major amputation rate,minor amputation rate,and total amputation times in Groups B and C were lower than those in Group *** Our research indicated that diabetic foot ulcers(DFUs)lead to major amputation,minor amputation,and total amputation through local infection and poor microcirculation and *** Ding and APG were effective attreating *** clinical efficacy of Huangma Ding was better than that of autologous platelet gel,which may be related to the better control of local infection by Huangma *** finding suggested that in patients with DFUs combined with coinfection,controll

关键词： Diabetic foot ulcer Huangma Ding Autologous platelet-rich gel Ankle-brachial index Transcutaneous oxygen partial pressure

严重烧伤大鼠血清对骨髓间充质干细胞迁移的影响

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第三军医大学学报 2015年第16期37卷 1643-1647页

作者：李茂华滕苗重庆医科大学附属第一医院烧伤整形外科重庆400016

目的观察严重烧伤大鼠血清刺激下骨髓间充质干细胞(BMSCs)迁移能力变化,探讨PI3K/Akt信号通路在BMSCs细胞迁移中的作用。方法建立严重烧伤大鼠模型,制备烧伤大鼠血清。1用体积分数10%的烧伤大鼠血清刺激BMSCs细胞不同时间后,Transwell... 详细信息

目的观察严重烧伤大鼠血清刺激下骨髓间充质干细胞(BMSCs)迁移能力变化,探讨PI3K/Akt信号通路在BMSCs细胞迁移中的作用。方法建立严重烧伤大鼠模型,制备烧伤大鼠血清。1用体积分数10%的烧伤大鼠血清刺激BMSCs细胞不同时间后,Transwell小室检测BMSCs细胞迁移能力,Western blot检测BMSCs细胞内磷酸化p38(p-p38)和磷酸化Akt(p-Akt)表达水平。2另取BMSCs细胞随机分为4组:对照组(含10%胎牛血清)、烧伤血清组(含10%烧伤大鼠血清)、烧伤血清+抑制剂组(含10%烧伤大鼠血清+10μmol/L的LY294002)、烧伤血清+激动剂组(含10%烧伤大鼠血清+200 ng/m L的IGF-1),Transwell小室检测各组细胞迁移情况。结果 1烧伤血清作用0、1、3、6、12、24 h时,BMSCs细胞较迁移数分别为0、1.0±0.7、14.6±4.6、45.0±6.4、82.8±8.3、122.2±11.4,3 h时BMSCs细胞出现迁移,6、12、24 h时BMSCs细胞数量多于3 h(P0.05);而p-Akt水平分别为0.59±0.08、0.65±0.06、0.83±0.22、1.10±0.21、1.22±0.19、1.62±0.30,6、12、24 h时较作用0 h时(加入血清后即刻)水平明显增高(P<0.05);12、24 h时较3 h时明显增高(P<0.05)。2对照组、烧伤血清组、烧伤血清+抑制剂组、烧伤血清+激动剂组培养24 h后,烧伤血清组BMSCs细胞迁移数量较对照组增多(P<0.01),与烧伤血清组比较,烧伤血清+激动剂组BMSCs细胞迁移数量增多(P<0.01),烧伤血清+抑制剂组细胞迁移数量明显减少(P<0.01)。结论严重烧伤大鼠血清可通过PI3K/Akt信号通路促进BMSCs细胞迁移。

关键词：烧伤骨髓间充质干细胞迁移 PI3K/Akt信号通路

基于面向通道分组卷积网络的番茄主要器官实时识别

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农业工程学报 2018年第10期34卷 153-162页

作者：周云成许童羽邓寒冰苗腾沈阳农业大学信息与电气工程学院沈阳110866

番茄器官的实时准确识别是实现自动采摘、靶向施药等自动化生产的关键。该文提出一种基于面向通道分组卷积网络的番茄主要器官实时识别网络模型,该模型直接用特征图预测番茄器官目标边界和类型。以统计可分性、计算速度等为判据,并结合... 详细信息

番茄器官的实时准确识别是实现自动采摘、靶向施药等自动化生产的关键。该文提出一种基于面向通道分组卷积网络的番茄主要器官实时识别网络模型,该模型直接用特征图预测番茄器官目标边界和类型。以统计可分性、计算速度等为判据,并结合样本扩增训练,分析了该网络和几种典型网络在番茄器官图像处理上的性能,以此筛选出识别网络的基础结构,在基础结构后面分别附加带dropout层的面向通道分组卷积模块和全卷积层作为识别网络的总体架构。试验结果表明:用面向通道分组卷积网络作为识别网络的基础结构,可在显著提高网络召回率、识别速度和精度的前提下,大幅降低模型的大小,该结构网络对花、果、茎识别的平均精度分别为96.52%、97.85%和82.62%,召回率分别为77.39%、69.33%和64.23%,识别速度为62帧/s;与YOLOv2相比,该文识别网络召回率提高了14.03个百分点,精度提高了2.51个百分点。

关键词：图像识别算法实时识别番茄卷积神经网络面向通道分组卷积特征提取

基于TDM的城市交通拥挤分析的进一步思考——以南京市为例

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价值工程 2011年第29期30卷 288-289页

作者：苗滕东南大学经济管理学院南京211189

本文针对城市交通拥挤现状,立足城市交通拥挤的实质,基于TDM城市交通拥挤分析,从中长期交通拥挤治理的角度,提出城市交通拥挤的治理措施。

关键词：交通拥挤资源高峰时段建议

基于RGB-D的肉牛图像全卷积网络语义分割优化

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农业工程学报 2019年第18期35卷 151-160页

作者：邓寒冰周云成许童羽苗腾徐静沈阳农业大学信息与电气工程学院沈阳110866 辽宁省农业信息化工程技术研究中心沈阳110866 北京农业信息技术研究中心北京100097

基于卷积神经网络的深度学习模型已越来越多的应用于检测肉牛行为。利用卷积操作实现肉牛图像的像素级分割有助于实现远距离、无接触、自动化的检测肉牛行为,为肉牛异常行为早期发现提供必要手段。为了提高复杂背景下肉牛图像语义分割精... 详细信息

基于卷积神经网络的深度学习模型已越来越多的应用于检测肉牛行为。利用卷积操作实现肉牛图像的像素级分割有助于实现远距离、无接触、自动化的检测肉牛行为,为肉牛异常行为早期发现提供必要手段。为了提高复杂背景下肉牛图像语义分割精度,降低上采样过程中的语义分割误差,该文提出基于RGB-D的肉牛图像全卷积网络(fully convolutional networks,FCN)的语义分割优化方法,用深度密度值来量化深度图像中不同像素点是否属于相同类型的概率,并根据深度图像与彩色图像在内容上的互补关系,优化和提升FCN对肉牛图像的语义分割(像素密集预测)精度。通过试验验证,该方法与全卷积网络的最优分割结果相比,可以将统计像素准确率平均提高2.5%,类别平均准确率平均提升2.3%,平均区域重合度平均提升3.4%,频率加权区域重合度平均提升2.7%。试验证明,该方法可以提升全卷积网络模型在复杂背景下肉牛图像语义分割精度。

关键词：图像处理模型动物语义分割 RGB-D 全卷积网络多模态肉牛图像