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Rare Metals 2009年第2期28卷 164-168页

作者： Peng Jihua Li Wenfang Huang Fangliang Tian jun Liu gang du jun S China Univ Technol Sch Mat Sci & Engn Guangzhou 510640 Guangdong Peoples R China

Al-Si metal matrix composites (MMCs) reinforced with 20 vol.% alumina-silicate shot fibers (Al2O3-SiO2(sf)) were fabricated by an infiltration squeeze method. Pure Pr metal was added into these composites. The effect of Pr addition on the microstructure evolution of Al-Si MMCs was investigated by SEM,TEM,and EDS. Pr addition is favorable to make uniform microstructures with the modified eutectic Si crystal. PrAlSi phase with high contents of Pr and Si is observed on the interface between the fiber and the m...

关键词： metal matrix composite microstructure evolution microscope Al-Si alloys rare earth

Synthesis and Antitumor Activities In Vitro of Solanesylpiperazinotriamine

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Chinese Chemical Letters 2006年第10期17卷 1301-1304页

作者： Chao Jie WANG Jian Hong WANG Ying GAN Zhi Yong CHEN gang jun du Jin ZHAO College of Chemistry and Chemical Technology Henan University Kaifeng 475001 Key Lab of Special Function Material Henan University Kaifeng 475001 Medical College of Henan Unversity Kaifeng 475001

A series of novel antitumor agents-the solanesylpiperazinotriamine derivatives were designed and synthesized, their structures were confirmed by IR,^ 1H-NMR, MS, and element analysis. The preliminary tests showed that at low micromolar concentrations these compounds exhibited obvious toxicity on tumor cells in vitro, and the synergistic effect on clinical antitumor agent indicated that at noncytotoxic concentrations they also evidently enhanced the curative effect of vincristine.

关键词： Solanesylpiperazinotriamine antitumor activity synergistic effect.

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基于异构终端的云信息服务平台设计与实现

电子设计工程 2017年第12期25卷 128-133页

作者：宋刚甘西军杜雯贵州省新技术研究所贵州贵阳550001

针对一种信息服务平台只能支持一种架构或者一种操作系统的展示终端,而不能同时支持多种架构或多种操作系统的展示终端,导致每个平台都是信息孤岛,无法进行数据共享和大数据统计分析的目的。采用HTML5跨平台多媒体展示方法,通过设计支... 详细信息

针对一种信息服务平台只能支持一种架构或者一种操作系统的展示终端,而不能同时支持多种架构或多种操作系统的展示终端,导致每个平台都是信息孤岛,无法进行数据共享和大数据统计分析的目的。采用HTML5跨平台多媒体展示方法,通过设计支持异构终端的云信息服务平台应用,实现平台支持多种异构终端统一管理、统一发布、统一数据采集、统一服务,用户可针对不同的应用场景,灵活选择不同的展示终端。

关键词：异构终端云服务插件式设计 HTML5 HTML5

同伴教育在提高三年制医学生临床实习效果中的应用

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中国当代医药 2017年第18期24卷 140-142,146页

作者：刚君杜亚琼张立荣仇建云首都医科大学大兴教学医院科教科北京102600

目的探讨同伴教育模式在三年制医学生临床实习中的应用效果。方法以2013级的27名学生和2012级的31名临床医学实习生分别作为实验组和对照组,分别运用同伴教育模式和传统教学模式,通过内、外、妇、儿、中医、社区6个专业的五站式出科考... 详细信息

目的探讨同伴教育模式在三年制医学生临床实习中的应用效果。方法以2013级的27名学生和2012级的31名临床医学实习生分别作为实验组和对照组,分别运用同伴教育模式和传统教学模式,通过内、外、妇、儿、中医、社区6个专业的五站式出科考试成绩和教师、患者满意度调查结果比较分析实验效果。结果实验组全体学生内、外、妇、儿、中医、社区6个专业的五站式出科考试(问诊、查体、辅助检查、写病历、口试)总分高于对照组,患者、教师对实验组学生满意度评分均高于对照组,差异有统计学意义(P<0.05)。结论同伴教育模式应用于三年制医学生临床实习教学中有助于提高学生对理论知识和技能的掌握和巩固,提高了教师和患者满意度。

关键词：同伴教育临床实习教学质量满意度

Synthesis, performance and structure characterization of glyoxal-monomethylolurea-melamine (G-MMU-M) co-condensed resin

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Chinese Journal of Chemical Engineering 2023年第7期59卷 92-104页

作者： Haixiang Liu jun Zhang Chunlei Dong gang Zhu Guanben du Shuduan Deng Yunnan Key Laboratory of Wood Adhesives and Glue Products Southwest Forestry UniversityKunming 650224China

In order to reduce the formaldehyde emission of formaldehyde-based wood adhesive from the source,it is aimed to develop a novel co-condensed resin of glyoxal-monomethylolurea-melamine(G-MMU-M).A series of G-MMU-M resins with various formulations of raw materials were successfully *** basic properties and bonding performance of the G-MMU-M resins were ***,the structures of resins were characterized by FTIR,^(13)C NMR,XPS,and *** results show that the prepared G-MMU-M resin remains stable for 30 d,meanwhile,the dry and wet bonding strength of the plywoods bonded with the resins,solid content and viscosity are influenced greatly by the addition amount of melamine and MMU/G molar *** G-MMU-M resins with MMU/G molar ratio of 0.9:1.0 and 8% melamine exhibit the highest dry and bonding strength of 1.98 MPa and 1.27 MPa,increased by 34% and 63%,respectively,in comparison with glyoxal-monomethylolurea(G-MMU)*** the G-MMU-M resins,there were four main oligomers including M—CH(—^(+)CH-MMU)-O-MMU,M-CH(—CH_(2)OH)-MMU-O-MMU,M—CH(—OH)—^(+)CH-MMU-O-MMU,and M—CH(—^(+)CH-MMU)-MMU-p-G.

关键词： Wood adhesive Glyoxal-monomethylolurea-melamine Synthesis Chemical reaction Measurement Structure

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废弃混凝土-水泥土强度特性及固化机理研究

工程建设与设计 2018年第6期 8-11,24页

作者：栗霞沈兴刚杜俊杨叶秀李丽蓉昆明学院城乡建设与工程管理学院昆明650214

将拆除城市旧建筑物和构筑物时产生的废弃混凝土掺入水泥土中,研究废弃混凝土-水泥土无侧限抗压强度的影响因素及其固化机理。采用正交试验方法,进行水泥土配合比设计和室内无侧限抗压强度试验。试验研究表明:影响废弃混凝土-水泥土无... 详细信息

将拆除城市旧建筑物和构筑物时产生的废弃混凝土掺入水泥土中,研究废弃混凝土-水泥土无侧限抗压强度的影响因素及其固化机理。采用正交试验方法,进行水泥土配合比设计和室内无侧限抗压强度试验。试验研究表明:影响废弃混凝土-水泥土无侧限抗压强度的主次因素依次是龄期、水泥掺量、废弃混凝土掺量;在水泥土中掺入15%~20%废弃混凝土可以有效提高水泥土的无侧限抗压强度。由废弃混凝土-水泥土固化机理分析得到:水泥土强度增长的主要原因是水泥的水解和水化反应;水泥与土颗粒之间的离子交换和团粒化作用进一步提高了水泥土的强度;废弃混凝土对水泥土强度增长的影响主要是填充效应和水化效应。

关键词：废弃混凝土水泥土正交试验无侧限抗压强度固化机理分析

On the strengthening and slip activity of Mg-3Al-1Zn alloy with pre-induced{1012¯}twins

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Journal of Magnesium and Alloys 2023年第4期11卷 1292-1307页

作者： Jie Kuang Yuqing Zhang Xinpeng du Jinyu Zhang gang Liu jun Sun State Key Laboratory for Mechanical Behavior of Materials Xi’an Jiaotong UniversityXi’an 710049P.R.China The College of Optics&Photonics University of Central FloridaOrlandoFL 32826United States

{1012¯}twins were introduced into the magnesium(Mg)plate AZ31 via pre-rolling along its transverse *** plates,both with and without the pre-induced{1012¯}twins,were subjected to uniaxial tension along different *** crystal plasticity modeling,we found that the strengthening effect of the pre-induced{1012¯}twins on the macroscopic flow stress primarily arised from the increased slip resistance caused by the boundaries,rather than the orientation hardening due to the twinning reorientation(although the latter did make its contribution in some specific loading directions).Besides,the pre-existing{1012¯}twins were found,by both experiments and simulation,to promote the activity of prismatic and pyramidalin the parent matrix of the *** analysis showed that the enhanced non-basal slip activity is related to the{1012¯}twin boundaries’low micro Hall-Petch slope ratios of non-basal slips to basal *** the critical resolved shear stress(CRSS)obtained from crystal plasticity modeling and the orientation data from EBSD,a probability-based slip transfer model was *** model predicts higher slip transfer probabilities and thus lower strain concentration tendencies at{1012¯}twin boundaries than that at grain boundaries,which agrees with the experimental observation that the strain localization was primarily associated with the *** present findings are helpful scientifically,in deepening our understanding of how the pre-induced{1012¯}twins affect the strength and slip activity of Mg alloys,and technologically,in guiding the design of the pre-strain protocol of Mg alloys.

关键词： Mg alloy {1012¯}twins Strengthening Slip activity Micro Hall-Petch effect

A universal strategy of multi-objective active learning to accelerate the discovery of organic electrode molecules

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Science China Chemistry 2024年第11期67卷 3681-3687页

作者： Jiayi du jun Guo Wei Liu Ziwei Li gang Huang Xinbo Zhang State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China School of Applied Chemistry and Engineering University of Science and Technology of ChinaHefei 230026China School of Materials Science and Engineering Changchun University of Science and TechnologyChangchun 130022China

Organic electrode molecules hold significant potential as the next generation of cathode materials for Li-ion batteries. In this study, we have introduced a multi-objective active learning framework that leverages Bayesian optimization and non-dominated sorting genetic algorithms-Ⅱ. This framework enables the selection of organic molecules characterized by high theoretical energy density and low gap(LUMO-HOMO)(LUMO, lowest unoccupied molecular orbital;HOMO, highest occupied molecular orbital). Remarkably, after only two cycles of active learning, the determination of coefficient can reach 0.962 for theoretical energy density and 0.920 for the gap with a modest dataset of 300 molecules, showcasing superior predictive capabilities. The 2,3,5,6-tetrafluorocyclohexa-2,5-diene-1,4-dione, selected by non-dominated sorting genetic algorithms-Ⅱ, has been successfully applied to Li-ion batteries as cathode materials, demonstrating a high capacity of 288 m Ah g^(-1)and a long cycle life of 1,000 cycles. This outcome underscores the high reliability of our framework. Furthermore, we have also validated the universality and transferability of our framework by applying it to two additional databases, the QM9 and OMEAD. When the training dataset of the model includes at least 500 molecules, the determination of coefficient essentially reaches approximately0.900 for four targets: gap, reduction potential, LUMO, and HOMO. Therefore, the universal framework in our work provides innovative insights applicable to other domains to expedite the screening process for target materials.

关键词： organic electrode molecules Li-ion batteries active learning multi-objective Bayesian optimization

Application of SVM in Analyzing the Headstream of Gushing Water in Coal Mine

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Journal of China University of Mining and Technology 2006年第4期16卷 433-438页

作者： YAN Zhi-gang ZHANG Hai-rong du Pei-jun School of Environment and Spatial Informatics China University of Mining ＆ Technology Xuzhou Jiangsu 221008 China

To recognize the presence of the headstream of gushing water in coal mines, the SVM (Support Vector Ma- chine) was proposed to analyze the gushing water based on hydrogeochemical methods. First, the SVM model for head- stream analysis was trained on the water sample of available headstreams, and then we used this to predict the unknown samples, which were validated in practice by comparing the predicted results with the actual results. The experimental results show that the SVM is a feasible method to differentiate between two headstreams and the H-SVMs (Hierachical SVMs) is a preferable way to deal with the problem of multi-headstreams. Compared with other methods, the SVM is based on a strict mathematical theory with a simple structure and good generalization properties. As well, the support vector W in the decision function can describe the weights of the recognition factors of water samples, which is very important for the analysis of headstreams of gushing water in coal mines.

关键词： support vector machine gushing water headstream recogmtlon H-SVMs

Construction of One New 3D Zinc-organic Framework Based on D-(+)-camphoric Acid and Bis(4-pyridylmethyl)piperazine

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Chinese Journal of Structural Chemistry 2013年第12期32卷 1885-1889页

作者： du Xi-gang LIU Shu-Hua LIU Ji-Chun ZHANG jun School of Chemical Engineering and Pharmaceutics Henan University of Science and Technology Key Laboratory for Applied Technology of Sophisticated Analytical Instruments of Shandong Province Shandong Analysis and Test CenterShandong Academy of Sciences

A new polymer [Zn2（cam）2（bpmp）]n 1 （H2cam = D-（＋）-camphoric acid, bpmp = bis（4-pyridylmethyl）piperazine） was synthesized under hydrothermal conditions. The compound crystallizes in the monoclinic system, space group P21/n with a = 12.305（9）, b = 12.945（9）, c = 13.619（10） A, β = 116.833（8）°, V= 1936（2）A3, Z = 4, Mr = 397.76, Dc= 1.365 Mg/m3,μ = 1.292 mm-1, F（000） = 832, the final R = 0.0578 and wR = 0.1678 for 2838 observed reflections with I 〉 2σ（I）. The compound presents a three-dimensional （3D） network extended by homochiral 2D layer and bpmp ligands. From the topology point of view, the structure could be described as a 3D 6-connected mab net with （44.610.8） topology. In addition, infrared spectroscopy, elemental analyses, thermogravimetric analysis and powder X-ray diffraction properties of 1 are also investigated.

关键词： metal-organic framework D-(+)-camphoric acid bis(4-pyridylmethyl)piperazine