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Crystal Structure of Organometallic Complex[Zn (pom)_2I_2]

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Chinese Journal of Structural Chemistry 1996年第4期15卷 311-314页

作者： dong mei-bin Li Song-Xian Zhang Han-Hui(Department of Chemistry, Fuzhou Universdy, Fuzhou, Fujian 350002) Yong Jing-Hai Geng Yi-Zhi Xu Ji-yan(Department of Physics, Shiping Teachers College,Shiping,Jilin, 136000) 福州大学化学系福建福州四平师范学院物理系吉林四平

The title complex [Zn (pom)_2I_2] (pom = 3-Methyl-4-Nitropyridine-1Oxide), C_(12)H_(12)N_4O_6I_2Zn, M_r= 627. 43, triclinic, space group P1, a= 11. 301 (2), b=13. 561(2) , c=6. 792(1) A, α=101. 29(1), β=96. 87(2), γ= 107. 13(1)°, V=957. 80(62) A￣3, Z=2, D_c=2. 175 g/cm￣3, λ(MoKa)=0. 71069 A, μ=45. 4 cm(-1),F (000) = 592, T= 296K, R(R_w) is 0. 068 (0. 078) for 2556 observed unique reflections. The structure of the complex is isolated and three-dimensional.

关键词： crystal structure organometallic complex isolated three-dimensional structure

Crystal Structure of[Cd(pom)_2Cl_2]

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Chinese Journal of Structural Chemistry 1996年第4期15卷 330-332页

作者： Wu Wen-Shi(Department of Chemistry,Hua-qiao University, Fujian, China, 362011)dong mei-bin Li Song-Xian Zhang Han-Hui Cheng Jian-Zhong(Department of Chemistry, Fuzhou University, Fujian , 350002) Huang You-Qing Hu Seng-Zhi (Department of Chemtstry, Xi 华侨大学化学系福建泉州福州大学化学系福建福州厦门大学化学系福建厦门

Catena-[bis (3-methyl-4-nitropyridine N-oxide ) cadmiumdichloride],[Cd(C_6H_6N_2O_3)_2Cl_2], M_r= 491. 56, monoclinic , P2_1, a= 3. 799 (3), b= 29. 231 ( 9),c=7. 679(5) A, β=100. 19(6)°, V=839. 4 A￣3, Z=2, D_c= 1. 94 g/cm￣3, λ(MoKa)= 0. 71069 A, F(000) =484, P(MoKa) = 16. 5 cm￣(-1), final R=0. 038 for 1202 Observed reflections, T= 296K. The Cd atom is octahedrally coordinated by two O atoms from the trans 3-methyl-4-nitropyridine N-oxide (pom) ligands in the axial positions and four Cl atoms lying in the equatorial plane. The coordination octahedra form chains along the short a axis by edge sharing through the Cl atoms.

关键词： cadmium complex nonlinear optical material one-dimensional coordination crystal structure

PKA reduces neuronal apoptosis by phosphorylation of Kv1.4

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PKA reduces neuronal apoptosis by phosphorylation of Kv1.4

华东六省一市生物化学与分子生物学会2003年学术交流会

作者： Yan-mei TAO, dong Yan, bin SHEN, Rui ZENG, Yi-zheng WANG (Institute of Neuroscience, CAS 200031)

Neuronal apoptosis induced by serum deprivation or by staurosporine was associated with an early enhancementof potassium efflux and loss of total intracellular potassium. The apoptosis is reduced by TEA, a non-selective po-tassium channel blocker, or by elevated extracellular potassium. In our experiments, treatment of neurons with TEAor elevated extracellular potassium caused phosphorylation of Tl domain in Kv1. 4. Further, forskolin, the agonistof PKA, stimulated the same phosphorylation in the Tl domain. We found that the phosphorylation of Tl domain in

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聚酯废弃物改性植物油沥青粘结剂的红外研究

光谱学与光谱分析 2006年第7期26卷 1221-1225页

作者：郑玉婴王灿耀吴章宏董美斌张星福州大学化学化工学院福建福州350002

采用蒸馏厂的下脚料———各种植物油沥青(棉油沥青、豆油沥青、混合油沥青)为主要原料,用聚酯废弃物为改性剂,经裂解、酯化等工艺制备成三种铸造用植物油沥青粘结剂(MB)。同时采用红外光谱和热重分析等手段对该三种粘结剂的基团结构,... 详细信息

采用蒸馏厂的下脚料———各种植物油沥青(棉油沥青、豆油沥青、混合油沥青)为主要原料,用聚酯废弃物为改性剂,经裂解、酯化等工艺制备成三种铸造用植物油沥青粘结剂(MB)。同时采用红外光谱和热重分析等手段对该三种粘结剂的基团结构,性能与固化机理进行探索,并与合脂粘结剂比较。结果表明:改性粘结剂的主要成分与合脂粘结剂大致相同,且具有更高的干拉强度、更慢的发气速度等优异性能,达到甚至超过合脂粘结剂的性能,可用于Ⅰ级型芯砂的粘结,而且成本低廉。

关键词：铸造用粘结剂植物油沥青聚酯废弃物酯化法

Microstructural evolution during the progressive transformation-induced plasticity effect in a Fe-0.1C-5Mnmedium manganese steel

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 369-379页

作者： mei Zhang Wenhao Li Yangfei Chen Yang Jiang Xiaofei Guo Han dong School of Materials Science and Engineering Shanghai UniversityShanghai 200444China State Key Laboratory of Advanced Special Steel Shanghai UniversityShanghai 200444China

The microstructural evolution of a cold-rolled and intercritical annealed medium-Mn steel(Fe-0.10C-5Mn)was investigated during uniaxial tensile ***-situ observations under scanning electron microscopy,transmission electron microscopy,and X-ray diffraction analysis were conducted to characterize the progressive transformation-induced plasticity process and associated fracture initiation *** findings were discussed with the local strain measurements via digital image *** results indicated that Lüders band formation in the steel was limited to 1.5%strain,which was mainly due to the early-stage martensitic phase transformation of a very small amount of the less stable large-sized retained austenite(RA),which led to localized stress concentrations and strain hardening and further retardation of *** small-sized RA exhibited high stability and progressively transformed into martensite and contributed to a stably extended Portevin-Le Chatelier *** volume fraction of RA gradually decreased from 26.8%to 8.2%prior to *** the late deformation stage,fracture initiation primarily occurred at the austenite/martensite and ferrite/martensite interfaces and the ferrite phase.

关键词： medium-Mn steel retained austenite progressive transformation-induced plasticity effect local strain fracture initiation

Preparation of Low Ratio Magnesium Ccement by Acid Leaching Treatment of Boron Mud

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Journal of Wuhan University of Technology(Materials Science) 2025年第1期40卷 120-129页

作者： YANG mei ZHANG Mingzhe CHEN Hao School of Materials Science and Engineering Shenyang Jianzhu UniversityShenyang 110168China School of Physical Science and Technology Shenyang Normal UniversityShenyang 110168China

The effects of liquid-solid ratio and reaction time on the leaching rate of magnesium at room temperature were investigated,as well as the effects of the molar ratio of MgO/MgCl_(2),the amount of water added,and the amount of acid-impregnated slag dosed on the compressive strength and water resistance of *** results showed that the magnesium element in the boron mud could be maximally leached under the conditions of 1:1 concentration of hydrochloric acid at room temperature,liquid-solid ratio of 2.5 mL·g^(-1),and reaction time of 5 h,and the main products were amorphous SiO_(2) as well as a small amount of magnesium olivine which had not been completely *** LR-MOC prepared using the acid-soaked mixture could reach a softening coefficient of 0.85 for 28 d of water immersion when the molar ratio of MgO/MgCl_(2) was 2.2,the amount of water added was 0 g,and the acid-soaked slag dosing was 40 wt%,which also led to an appreciable late-strength,with an increase of 19.4%in compressive strength at 28 d compared to that at 7 *** previous studies,LR-MOC prepared in this way has a final strength phase that is not the more easily hydrolysed 3-phase but the lath-like *** this phenomenon,we analyzed the mechanism and found that,during the acid leaching process,a part of amorphous SiO_(2) dissolved in the acid leaching solution formed a silica sol,in which Mg^(2+)played a bridging role to make the silica sol more *** the addition and hydrolysis of MgO,the silica sol gel coagulation slows down,providing a capping layer to inhibit the hydrolysis of the 5-phase crystals and providing some strength after *** amorphous SiO_(2) in the other part of the acid-impregnated slag generated M-S-H gel with Mg^(2+)and OH-,which synergised with the dense structure composed of interlocking crystals to improve the water resistance of LR-MOC.

关键词： boron mud magnesium chloride-oxygen cement acid immersion water resistance silica sol

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高强度铸造用植物油沥青粘结剂

铸造技术 2005年第10期26卷 883-886页

作者：郑玉婴吴章宏王灿耀董美斌张星福州大学化学化工学院福建福州350002

用蒸馏厂的下脚料———各种植物油沥青为主要原料,用聚酯废弃物为改性剂,经酯化等工艺制备成高强度铸造用粘结剂。经性能测试表明,其可以代替桐油粘结剂,用于I级型芯的粘结。由于这些原材料都是工业下脚料,来源丰富且合成工艺简单,因... 详细信息

用蒸馏厂的下脚料———各种植物油沥青为主要原料,用聚酯废弃物为改性剂,经酯化等工艺制备成高强度铸造用粘结剂。经性能测试表明,其可以代替桐油粘结剂,用于I级型芯的粘结。由于这些原材料都是工业下脚料,来源丰富且合成工艺简单,因此成本低廉。

关键词：铸造用粘结剂植物油沥青酯化法聚酯废弃物

耦合系统的成像质量对端面抽运固体激光器的影响

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中国激光 2009年第1期36卷 47-50页

作者：亓岩宫武鹏李欢颜博霞房涛郑光梅东滨毕勇中国科学院光电研究院北京100085 中国科学院长春光学精密机械与物理研究所应用光学国家重点实验室吉林长春130033 中国科学院研究生院北京100039

耦合光学系统是端面抽运固体激光器中不可缺少的部分,其成像质量的优劣直接影响到激光器转换效率的高低。以激光二极管(LD)端面抽运Nd∶YVO4/LBO 457 nm蓝光激光器为例,分别采用两种不同结构的准直聚焦透镜组合作为耦合光学系统,分析其... 详细信息

耦合光学系统是端面抽运固体激光器中不可缺少的部分,其成像质量的优劣直接影响到激光器转换效率的高低。以激光二极管(LD)端面抽运Nd∶YVO4/LBO 457 nm蓝光激光器为例,分别采用两种不同结构的准直聚焦透镜组合作为耦合光学系统,分析其对抽运光的成像情况以及对端面抽运固体激光器光束质量和输出功率的影响,在激光器的抽运功率和谐振腔的参数完全相同的情况下,改进的四片式耦合光学系统使激光器输出的光束质量得到了明显改善,同时极大地提高了倍频输出功率,在30 W的抽运功率下,得到了4.3 W的连续457 nm蓝光激光输出,光-光转换效率达到13.7%。

关键词：激光器固体激光器耦合系统倍频蓝光

MixerKT:A Knowledge Tracing Model Based on Pure MLP Architecture

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Computers, Materials & Continua 2025年第1期82卷 485-498页

作者： Jun Wang Mingjie Wang Zijie Li Ken Chen Jiatian mei Shu Zhang Key Laboratory of Education Informatization for Nationalities Ministry of EducationYunnan Normal UniversityKunming650000China Yunnan Key Laboratory of Smart Education Yunnan Normal UniversityKunming650000China

In the field of intelligent education,the integration of artificial intelligence,especially deep learning technologies,has garnered significant *** tracing(KT)plays a pivotal role in this field by predicting students’future performance through the analysis of historical interaction data,thereby assisting educators in evaluating knowledgemastery and tailoring instructional *** knowledge tracingmethods,largely based on Recurrent Neural Networks(RNNs)and Transformer models,primarily focus on capturing long-term interaction patterns in sequential ***,these models may neglect crucial short-term dynamics and other relevant *** paper introduces a novel approach to knowledge tracing by leveraging a pure Multilayer Perceptron(MLP)*** proposeMixerKT,a knowledge tracing model based on theHyperMixer framework,which uniquely integrates global and localMixer feature *** architecture enables more effective extraction of both long-terminteraction trends and recent learning behaviors,addressing limitations in currentmodels thatmay overlook these key *** evaluations on twowidely-used datasets,ASSIS Tments2009 and Algebra2005,demonstrate that MixerKT consistently outperforms several state-of-the-art models,including DKT,SAKT,and Separated Self-Attentive Neural Knowledge Tracing(SAINT).Specifically,MixerKT achieves higher prediction accuracy,highlighting its effectiveness in capturing the nuances of learners’knowledge *** results indicate that our model provides a more comprehensive representation of student learning patterns,enhancing the ability to predict future performance with greater precision.

关键词： Knowledge tracing multilayer perceptron channel mixer sequence mixer