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Nano Research 2024年第4期17卷 2814-2823页

作者： Chenguang Yang dechang tao Kun Yan Zhiyao Li Qingshi Guo Wenwen Wang Dong Wang Key Laboratory of Textile Fiber and Products(Wuhan Textile University) Ministry of EducationWuhan Textile UniversityWuhan 430200China College of Chemistry Chemical Engineering and BiotechnologyDonghua UniversityShanghai 201620China

Oil pollution is a serious environmental and natural resource *** adsorption materials for oil–water separation have limitations in terms of their preparation cost,reusability,and mechanical *** the conventional adsorption materials,super-hydrophobic/super-lipophilic materials are easily contaminated by *** this study,polypropylene(PP)is used as a foam substrate to prepare an open-cell PP foam via hot pressing,supercritical CO_(2) foaming,and electron beam(EB)*** impact of EB irradiation dose on the open-cell content of PP foam can lead to cell wall rupture,resulting in an open-cell structure that enhances oil-water separation *** an absorbed radiation dose of 200 kGy,the PP foams exhibit optimal oil–water separation performance,cyclic compression stability,heat insulation,and preparation *** open-cell content of PP foam is increased to 86.5%,the adsorption capacity for diesel oil is 42.8 g/g,and the adsorption efficiency remains at 99.6%after 100 cycles of oil desorption in a complex pH ***,cracks and nano-voids simultaneously promote the capillary action of oil,and the oil transport rate is 0.0713 g/(g·s).This study provides a new concept for the preparation of open-cell polymer foams that can meet the demand for high oil-absorption capacity under complex acid-base pH conditions.

关键词： open-cell polypropylene(PP)foam electron beam irradiation oil/water separation cyclic compression complex acid-base pH conditions

Controlled Twill Surface Structure Endowing Nanofiber Composite Membrane Excellent Electromagnetic Interference Shielding

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Nano-Micro Letters 2024年第11期16卷 255-273页

作者： dechang tao Xin Wen Chenguang Yang Kun Yan Zhiyao Li Wenwen Wang Dong Wang Key Laboratory of Textile Fiber and Products(Wuhan Textile University) Ministry of EducationWuhan Textile UniversityWuhan 430200People’s Republic of China College of Chemistry Chemical Engineering and BiotechnologyDonghua UniversityShanghai 201620People’s Republic of China

Inspired by the Chinese Knotting weave structure,an electromagnetic interference(EMI)nanofiber composite membrane with a twill surface was ***(vinyl alcohol-co-ethylene)(Pva-co-PE)nanofibers and twill nylon fabric were used as the matrix and filter templates,respectively.A Pva-co-PEMXene/silver nanowire(Pva-co-PE-MXene/AgNW,PM_(x)Ag)membrane was successfully prepared using a template *** the MXene/AgNW content was only 7.4 wt%(PM_(7.4)Ag),the EMI shielding efficiency(SE)of the composite membrane with the oblique twill structure on the surface was 103.9 dB and the surface twill structure improved the EMI by 38.5%.This result was attributed to the pre-interference of the oblique twill structure in the direction of the incident EM wave,which enhanced the probability of the electromagnetic waves randomly colliding with the MXene ***,the internal reflection and ohmic and resonance losses were *** PM_(7.4)Ag membrane with the twill structure exhibited both an outstanding tensile strength of 22.8 MPa and EMI SE/t of 3925.2 dB cm^(-1).Moreover,the PM_(x)Ag nanocomposite membranes demonstrated an excellent thermal management performance,hydrophobicity,non-flammability,and performance stability,which was demonstrated by an EMI SE of 97.3%in a high-temperature environment of 140℃.The successful preparation of surface-twill composite membranes makes it difficult to achieve both a low filler content and a high EMI SE in electromagnetic shielding *** strategy provides a new approach for preparing thin membranes with excellent EMI properties.

关键词： Twill surface structure MXene/AgNW Nanofiber membrane Electromagnetic interference Flexibility and mechanical properties

超级柔韧性和优异电磁屏蔽性能的PVA-co-PE纳米纤维覆铜膜

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材料导报 2024年第14期38卷 251-258页

作者：陶德昌文鑫李雪丽严坤赵青华夏明杨晨光王栋武汉纺织大学纺织纤维及制品教育部重点实验室武汉高德红外股份有限公司

本工作通过紫外辐射诱导和化学还原反应相结合成功制备了具有多级结构的聚乙烯醇-聚乙烯(PVA-co-PE)纳米纤维覆铜膜，PVA-co-PE纳米纤维覆铜膜具有超级柔韧性能和电磁屏蔽性能，且具有多次循环压缩后性能不减的稳定性。首先通过紫外辐... 详细信息

本工作通过紫外辐射诱导和化学还原反应相结合成功制备了具有多级结构的聚乙烯醇-聚乙烯(PVA-co-PE)纳米纤维覆铜膜，PVA-co-PE纳米纤维覆铜膜具有超级柔韧性能和电磁屏蔽性能，且具有多次循环压缩后性能不减的稳定性。首先通过紫外辐照引入一定量的活化羟基，然后通过静电配位和铜粒子的化学还原作用，在纳米纤维膜上实现无钯镀铜。采用傅里叶红外光谱仪(AIR-FTIR)、能量色散型X射线荧光分析仪(EDX-7000)、扫描电子显微镜(SEM)等对样品进行结构性能分析。结果表明，成功实现PVA-co-PE纳米纤维覆铜膜的制备，SEM图表明，铜颗粒均匀分布于纳米纤维膜表面，并且薄膜由亲水转变为不易浸润。通过四探针仪器和矢量网络分析仪表征了薄膜材料的导电性和电磁屏蔽性能。结果表明，覆铜膜达到导体水平，吸波值达到47.3 dB。经过多次循环压缩后覆铜膜材料电磁屏蔽性能几乎不减，说明制得的纳米纤维覆铜膜具有优异的柔韧性和吸波稳定性，其在柔性智能可穿戴元器件领域具有广阔的应用空间。

关键词： PVA-co-PE纳米纤维膜化学镀铜导电性疏水性电磁屏蔽

Experiments and kinetic modeling of the sorbitol dehydration to isosorbide catalyzed by sulfuric acid under conditions of non-constant volume

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Chinese Journal of Chemical Engineering 2024年第9期73卷 281-289页

作者： dechang Cheng Zhihong Ma Ziyang Liu Xiaohui Liu tao Liu Weizhen Sun Ling Zhao State Key Laboratory of Chemical Engineering School of Chemical EngineeringEast China University of Science and TechnologyShanghai 200237China Shanghai Key Laboratory of Functional Materials Chemistry Research Institute of Industrial CatalysisSchool of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai 200237China

Isosorbide is a novel bio-based material derived as a secondary dehydration product of *** work focuses on the kinetics of sulfuric acid-catalyzed dehydration of sorbitol under conditions of nonconstant ***,the effects of stirring rate,catalyst dosage,reaction temperature,and reaction time on the dehydration reaction of sorbitol were *** yield of isosorbide up to 77.13%was obtained after 1.5 h of reaction time under conditions of 2 kPa,1.0%(mass)catalyst dosage,and 413.15 *** on the sorbitol dehydration reaction mechanism and a simplified reaction network,a kinetic model was developed in this work.A good agreement was accomplished between kinetic modeling and experiments between 393.15 and 423.15 *** fitting results indicate that side reactions with higher activation energies are more affected by reaction temperatures,and the main side reaction that influences the selectivity of isosorbide is the oligomerization reaction among the primary dehydration products of *** model fitting of the catalyst amounts effect shows that the effective concentration of sulfuric acid would be reduced with the increase of dosage due to the molecular agglomeration ***,the kinetic experiments and modeling results obtained in this work will be helpful to the design and optimization of the industrial sorbitol dehydration process.

关键词： Isosorbide Sorbitol dehydration Non-constant volume Kinetic modeling

Solvents adjusted pure phase CoCO_(3) as anodes for high cycle stability

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Journal of Advanced Ceramics 2021年第3期10卷 509-519页

作者： Liming LIU Xiaoxiao HUANG Zengyan WEI Xiaoming DUAN Bo ZHONG Long XIA tao ZHANG Huatao WANG dechang JIA Yu ZHOU Rui ZHANG Department of Materials Science School of Material Science and EngineeringHarbin Institute of TechnologyHarbin 150001China Key Laboratory of Advanced Structural Functional Integration Materials&Green Manufacturing Technology Harbin Institute of TechnologyHarbin 150001China School of Materials Science and Engineering Harbin Institute of Technology at WeihaiWeihai 264009China College of Materials Science and Engineering Hunan UniversityChangsha 410082China

CoCO_(3) with high theoretical capacity has been considered as a candidate anode for the next generation of lithium-ion batteries(LIBs).However,the electrochemical performance of CoCO_(3) itself,especially the cyclic stability at high current density,hinders its ***,pure phase CoCO_(3) particles with different particle and pore sizes were prepared by adjusting the solvents(diethylene glycol,ethylene glycol,and deionized water).Among them,CoCO_(3) synthesized with diethylene glycol(DG-CC)as the solvent shows the best electrochemical performance owing to the smaller particle size and abundant mesoporous structure to maintain robust structural stability.A high specific capacity of 690.7 mAh/g after 1000 cycles was achieved,and an excellent capacity retention was *** capacity was contributed by diverse electrochemical reactions and the impedance of DG-CC under different cycles was further *** results provide an important reference for the structural design and stable cycle performance of pure CoCO_(3).

关键词： lithium ion battery(LIB) cobalt carbonate solvothermal method morphological control solvent pure phase

Microstructural evolution and mechanical properties of in situ nano Ta_(4)HfC_(5) reinforced SiBCN composite ceramics

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Journal of Advanced Ceramics 2020年第6期9卷 739-748页

作者： Bingzhu WANG Daxin LI Zhihua YANG dechang JIA Jingyi GUAN Hao PENG Delong CAI Peigang HE Xiaoming DUAN Yu ZHOU tao ZHANG Chenguang GAO Institute for Advanced Ceramics School of Materials Science and EngineeringHarbin Institute of TechnologyHarbin 150001China Key Laboratory of Advanced Structural-Functional Integration Materials&Green Manufacturing Technology Harbin Institute of TechnologyHarbin 150001China State Key Laboratory of Advanced Welding and Joining Harbin Institute of TechnologyHarbin 150001China Beijing Institute of Control Engineering Beijing 100080China

The in situ nano Ta_(4)HfC_(5) reinforced SiBCN-Ta_(4)HfC_(5) composite ceramics were prepared by a combination of two-step mechanical alloying and reactive hot-pressing *** microstructural evolution and mechanical properties of the resulting SiBCN-Ta_(4)HfC_(5) were *** the first-step milling of 30 h,the raw materials of TaC and HfC underwent crushing,cold sintering,and short-range interdiffusion to finally obtain the high pure nano Ta_(4)HfC_(5).A hybrid structure of amorphous SiBCN and nano Ta_(4)HfC_(5) was obtained by adopting a second-step *** reactive hot-pressing sintering,amorphous SiBCN has crystallized to 3C-SiC,6H-SiC,and turbostratic BN(C)phases and Ta_(4)HfC_(5) retained the form of the *** the in situ generations of 2.5 wt% Ta_(4)HfC_(5),Ta_(4)HfC_(5) is preferentially distributed within the turbostratic BN(C);however,as Ta_(4)HfC_(5) content further raised to 10 wt%,it mainly distributed in the grain-boundary of BN(C) and *** introduction of Ta_(4)HfC_(5) nanocrystals can effectively improve the flexural strength and fracture toughness of SiBCN ceramics,reaching to 344.1 MPa and 4.52 MPa·m^(1/2),*** work has solved the problems of uneven distribution of ultra-high temperature phases in the ceramic matrix,which is beneficial to the real applications of SiBCN ceramics.

关键词： Ta_(4)HfC_(5) SiBCN microstructure evolution mechanical properties

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一种快速移动对象轨道聚类算法

高技术通讯 2010年第1期20卷 99-105页

作者：陶运信皮德常南京航空航天大学信息科学与技术学院南京210016

针对已有轨道聚类(TRACLUS)算法的线段聚类模块需要对划分后的每条线段进行邻域查询的问题,将取样技术引入轨道聚类,提出一种快速移动对象轨道聚类(FTCS)算法。FTCS算法根据基于极大连通子图的合并原理,对核心线段的Eps邻域以及与该Eps... 详细信息

针对已有轨道聚类(TRACLUS)算法的线段聚类模块需要对划分后的每条线段进行邻域查询的问题,将取样技术引入轨道聚类,提出一种快速移动对象轨道聚类(FTCS)算法。FTCS算法根据基于极大连通子图的合并原理,对核心线段的Eps邻域以及与该Eps邻域相重叠的所有轨道聚类进行合并,避免了TRACLUS算法中核心线段Eps邻域内线段的不必要邻域查询操作。在真实和合成轨道数据集上的大量实验结果表明,FTCS算法显著降低了邻域查询操作次数,在保持TRACLUS算法轨道聚类质量的同时,成倍提高了轨道聚类的时间效率。

关键词：数据挖掘聚类轨道邻域密度

Comparison of Charlson＇s weighted index of comorbidities with the chronic health score for the prediction of mortality in septic patients

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Chinese Medical Journal 2014年第14期127卷 2623-2627页

作者： Cui Yunliang Wang tao Bao Jun Tian Zhaotao Lin Zhaofen Chen dechang Jinan Mil Gen Hosp Dept Crit Care Med Jinan 250031 Shandong Peoples R China Chinese Peoples Liberat Army Gen Hosp Dept Emergency & Intens Care Unit Hainan Branch Sanya 572013 Hainan Peoples R China Second Mil Med Univ Dept Emergency Med Changzheng Hosp Shanghai 200003 Peoples R China

Background Comorbidity is one of the most important determinants ot short-term and long-term outcomes in septic patients. Charlson＇s weighted index of comorbidities （WIC） and the chronic health score （CHS）, which is a component of the acute physiology and chronic health evaluation （APACHE） II, are two frequently-used measures of comorbidity. In this study, we assess the performance of WIC and CHS in predicting the hospital mortality of intensive care unit （ICU） patients with sepsis. Methods A total of 338 adult patients with sepsis were admitted to a multisystem ICU between October 2010 and August 2012. Clinical data were collected, including age, gender, underlying diseases, key predisposing causes, severity-of- sepsis, and hospital mortality. The APACHE II, CHS, acute physiology score （APS）, sequential organ failure assessment （SOFA） and WIC scores were assessed within the first 24 hours of admission. Univariate and multiple Logistic regression analyses were used to compare the performance of WlC and CHS. The area under the receiver operating characteristic curve （AUC） was used to predict hospital mortality over classes of risk. Results Of all the enrolled patients, 224 patients survived and 114 patients died. The surviving patients had significantly lower WlC, CHS, APACHE II, and SOFA scores than the non-surviving patients （P 〈0.05）. Combining WIC or CHS with other administrative data showed that the hospital mortality was significantly associated with age, severe sepsis, key predisposing causes such as pneumonia, a history of underlying diseases such as hypertension and congestive cardiac failure, and WlC, CHS and APS scores （P 〈0.05）. The AUC for the hospital mortality were 0.564 （95% confidence interval （CO 0.496-0.631） of CHS, 0.663 （95% CI 0.599-0.727） of WIC, 0.770 （95% CI 0.718-0.822） of APACHE II, 0.856 （95% Cl 0.815-0.897） of the CHS combined with other administrative data, and 0.857 （95% CI 0.817-0.897） of the WlC combined with other administrative data

关键词： Charlson's weighted index of comorbidities acute physiology and chronic health evaluation II sequential organ failure assessment sepsis outcome

Golay Code Clustering for Mobility Behavior Similarity Classification in Pocket Switched Networks

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通讯和计算机（中英文版） 2012年第4期9卷 466-472页

作者： Hongjun YU tao Jing dechang Chen Simon Y. Berkovich Department of Computer Science The George Washington University Washington DC 20052 USA School of Electronics and lnformation Engineering Beo＇ing JiaoTong University Beo＇ing P.R. China Department of Preventive Medicine and Biometrics Uniformed Services University of the Health Sciences Bethesda MD 20814USA

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自组织前向神经网络与非线性动态系统模化

控制理论与应用 2000年第1期17卷 96-98页

作者：申弢韩守木黄树红刘德昌华中理工大学动力工程系武汉430074

将自组织学习过程引入到前向网络的训练中 ,提出了一种新的三层前向神经网络的训练方法 .训练过程首先利用自组织分簇算法确定隐含层结点的数目以及权值 ,然后通过求解线性最小二乘问题估计输出层权值 .自组织过程产生的激活权值对输入... 详细信息

将自组织学习过程引入到前向网络的训练中 ,提出了一种新的三层前向神经网络的训练方法 .训练过程首先利用自组织分簇算法确定隐含层结点的数目以及权值 ,然后通过求解线性最小二乘问题估计输出层权值 .自组织过程产生的激活权值对输入数据具有一种特征变换的功能 .利用该方法训练的网络可以称之为自组织前向网络 (SOFN) .文中通过实际非线性动态系统建模的例子 ,说明了SOFN网络具有良好性能 .

关键词：神经网络训练算法非线性系统自组织学习