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Effect of Carbon on the Paramagnetic-Antiferromagnetic Transition and γ→εMartensitic Transformation of Fe-24Mn Alloys

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Journal of Materials Science & technology 2000年第3期16卷 297-301页

作者： Xing LU, Zuoxiang QIN, Yansheng ZHANG, Xingyu wang and Fengxian LI (Department of Materials Science & Engineering, dalian Railway institute, dalian 116028, China) Bingzhe ding and Zhuangqi HU (State Key Laboratory for RSA, institute of Metal Research, Chi Department of Materials Science and Engineering Dalian Railway Institute Dalian 116028 China State Key Laboratory for RSA Institute of Metal Research Chinese Academy of Science Shenyang 110015 China

The effect of C content (0.014-0.39 wt pct) on the paramagnetic-antiferromagnetic transition and γ→ε martensitic transformation of Fe-24Mn alloys has been investigated by the resistivity, dilation, tensile properties measurement and microstructure examination. The results have shown that C decreases T_N; increases the thermal expansion coefficients both above and below the T_N; increases the resistivity above the T_N and antiferromagnetic scattering resistivity below T_N. It strongly depresses the γ→ε martensitic transformation and reduces the M_s of Fe-24Mn alloys. Moreover, it increases the lattice parameter of austenite, enhances the tensile ductility, but almost does not affect the tensile strength. With increasing C content from 0.014 to 0.19 wt pct, the yield strength of Fe-24Mn alloy decreases obviously arising from the decreasing of preexisting ε martensite. but it increases from 0.19 to 0.39 wt pct C due to the solution hardening of C.

关键词： Mn Effect of Carbon on the Paramagnetic-Antiferromagnetic Transition and Martensitic Transformation of Fe-24Mn Alloys Fe

Adaptive Decentralized Asymptotic Tracking Control for Large-Scale Nonlinear Systems With Unknown Strong Interconnections

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IEEE/CAA Journal of Automatica Sinica 2022年第1期9卷 173-186页

作者： Ben Niu Jidong Liu ding wang Xudong Zhao Huanqing wang College of Information Science and Engineering Shandong Normal UniversityJinan 250014China School of Artificial Intelligence Nankai UniversityTianjin 300071China Faculty of Information technology Beijing University of TechnologyBeijing 100124 State Key Laboratory of Management and Control for Complex Systems Institute of AutomationChinese Academy of SciencesBeijing 100190China School of Control Science and Engineering Dalian University of TechnologyDalian 116023China Department of Mathematical Science and Automatization institute Bohai UniversityJinzhou 121000China

An adaptive decentralized asymptotic tracking control scheme is developed in this paper for a class of large-scale nonlinear systems with unknown strong interconnections,unknown time-varying parameters,and ***,by employing the intrinsic properties of Gaussian functions for the interconnection terms for the first time,all extra signals in the framework of decentralized control are filtered out,thereby removing all additional assumptions imposed on the interconnec-tions,such as upper bounding functions and matching ***,by introducing two integral bounded functions,asymptotic tracking control is ***,the nonlinear filters with the compensation terms are introduced to circumvent the issue of“explosion of complexity”.It is shown that all the closed-loop signals are bounded and the tracking errors converge to zero *** the end,a simulation example is carried out to demonstrate the effectiveness of the proposed approach.

关键词： Adaptive decentralized control asymptotic tracking control large-scale nonlinear systems unknown strong interconnections

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管道内可燃气体爆燃的一维数值模拟

天然气工业 2003年第4期23卷 89-92页

作者：毕明树尹旺华丁信伟王淑兰大连理工大学化工学院

密闭空间可燃气体爆炸一直是化工、石油、矿业、冶金等行业的重大灾害之一。由于可燃性气体燃料与空气混合物爆源具有能量密度小、爆源体积大、能量释放时间长等特点 ,所以点源强爆炸近似不再成立。文章从流体力学和化学反应动力学守恒... 详细信息

密闭空间可燃气体爆炸一直是化工、石油、矿业、冶金等行业的重大灾害之一。由于可燃性气体燃料与空气混合物爆源具有能量密度小、爆源体积大、能量释放时间长等特点 ,所以点源强爆炸近似不再成立。文章从流体力学和化学反应动力学守恒方程出发 ,对管道内可燃气体爆燃进行了数值模拟 ,获得了不同时刻爆燃的压力场、温度场、密度场 ,讨论了可燃气体活性、组分以及管道长度对爆燃压力和压力上升速率的影响 ,为工程上防爆、抑爆、泄爆提供了理论基础和数据。

关键词：管道可燃气体爆燃一维数值模拟密闭系统化学反应模型

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钢筋混凝土无箍板抗剪强度试验研究

土木工程学报 1993年第2期26卷 9-18页

作者：黄相才万卷王清湘彭天明郑州工学院交通部天科所大连理工大学河海大学

本文依据所做的钢筋混凝土无箍板在对称集中荷载作用下104块板的试验结果,通过对其破坏形态、破坏机理以及受力特性的分析,找出了影响抗剪强度的主要因素,提出了抗剪强度极限状态表达式。该推荐公式与试验结果有较好的拟合优度,并有较... 详细信息

本文依据所做的钢筋混凝土无箍板在对称集中荷载作用下104块板的试验结果,通过对其破坏形态、破坏机理以及受力特性的分析,找出了影响抗剪强度的主要因素,提出了抗剪强度极限状态表达式。该推荐公式与试验结果有较好的拟合优度,并有较好地应用价值和较显著的经济效果。

关键词：钢筋混凝土无箍板抗剪强度试验

Interface-directed epitaxially growing nickle ensembles as efficient catalysts in dry reforming of methane

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Journal of Energy Chemistry 2022年第3期31卷 502-513,I0014页

作者： Ping wang Song Wei Shiyi wang Ronghe Lin Xiaoling Mou Yunjie ding Hangzhou institute of Advanced Studies Zhejiang Normal UniversityHangzhou 311231ZhejiangChina School of Chemical Engineering and Light Industry Guangdong University of Technology.Guangzhou 510006GuangdongChina Analysis and Test Center Guangdong University of TechnologyGuangzhou 510006GuangdongChina dalian National Laboratory for Clean Energy Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina The State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina

Supported nickel catalysts are promising candidates for dry reforming of methane, but agglomeration of Ni^(0) and coke deposition hinder the industrial applications. Herein, we report a novel interface-directed synthetic approach to construct distinct metal ensembles by carefully tuning the compositions of the carriers. A Zr-Mn-Zn ternary oxide-supported Ni catalyst, together with the respective binary oxide-supported analogues, was synthesized by adopting a sequential co-precipitation and wetness impregnation method. Combined characterization techniques identify distinct catalyst models, including (i) conventional NiO nanoparticles with different sizes on Zr-Mn and Zr-Zn, and (ii) epitaxially growing NiO ensembles of a few nanometers thickness at the periphery of ZnO_(x) particles. These catalysts exhibit divergent responses in the catalytic testing, with the ternary oxide system significantly outperforming the binary analogues. The strong electronic interactions between Mn-Ni increase Ni dispersion and the activity while the stability is strengthened upon Zn addition. Both high activity, high selectivity, and remarkable stability are attained upon co-adding Mn and Zn. The interfaces between Ni and Zr-Mn-Zn rather than the physical contacts of individual oxide-supported analogues through mechanical mixing are keys for the outstanding performance.

关键词： Methane dry reforming Nickel Interface Epitaxial growth Structure-performance relationship

Rapid Synthesis of Boron-MWW Zeolite Through a Solvent-free Strategy

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Chemical Research in Chinese Universities 2024年第6期40卷 1245-1255页

作者： BO Shuang wang Tianlong LV tianming WU Huifang FENG Ziyi MIAO Lei FENG Zhaochi REN Limin MENG Changgong State Key Laboratory of Fine Chemicals School of ChemistryDalian University of TechnologyDalian 116024P.R.China Instrumental Analysis Center Dalian University of TechnologyDalian 116024P.R.China State Key Laboratory of Catalysis Dalian National Laboratory for Clean EnergyDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023P.R.China College of Environmental and Chemical Engineering Dalian UniversityDalian 116622P.R.China

ERB-1 zeolite emerges as a key bridging material for crafting heteroatom-containing MWW for versatile catalytic *** this study,we developed a solvent-free strategy facilitated by high-temperature condition and seed assistance,streamlining the synthesis of ERB-1 *** novel approach not only significantly reduces the growth time to 12 h compared to the conventional 168-h hydrothermal synthesis but also enhances product yield while minimizing waste *** from the platelet seeds and the grinding force,a distinct non-classical growth pathway,involving nanoparticle attachment,epitaxial growth,anisotropic assembly,and crystallization,was observed in the solvent-free *** heteroatom substitution,pillared Sn-MWW was successfully prepared,exhibiting remarkable stability and catalytic performance in the Bayer-Villiger oxidation reaction of *** findings present a simple and cost-effective way for rapid synthesis of MWW zeolite,with implications extending to diverse catalytic applications.

关键词： Solvent-free strategy ERB-1 Pillared Sn-MWW Baeyer-Villiger oxidation

Novel System for Calibration of Large-scale Length Measuring Instruments

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Novel System for Calibration of Large-scale Length Measuring...

Influences of working pressure on properties for TiO_2 films deposited by DC pulse magnetron sputtering

第三届国际仪器科学技术学术研讨会

作者： MA Li-qun a LI Bai-yuan a JIN Shu-yuan a wang Ji-hu a wang Li-ding b wang Xiao-dong b aChangcheng institute of Metrology & Measurement (CIMM) Beijing 100095 China bResearch Center for MST dalian University of technology (DUT) dalian 116024 China

In order to be able to utilize laser interferometer and other high accuracy large-scale length measuring instruments for calibration purpose at worksite, high accurate measurement and traceablity for

关键词： large-scale length measurement laser interferometer calibration Abbe error compensation

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Journal of Environmental Sciences 2009年第6期21卷 741-744页

作者： ZHANG Can ding Wanyu wang Hualin CHAI Weiping JU Dongying institute of Optoelectronic Materials and Device Dalian Jiaotong University Dalian 116028 China School of Materials Science and Engineering Dalian Jiaotong University Dalian 116028 China Department of Material Science and Engineering Saitama Institute of Technology Fukaya 369-0293 Japan

TiO2 films were deposited at room temperature by DC pulse magnetron sputtering *** crystalline structures,morphological features and photocatalytic activity of TiO2 films were systematically investigated by X-ray diffraction（XRD）,atomic force microscopy（AFM） and ultraviolet spectrophotometer,*** results indicated that working pressure was the key deposition parameter in？uencing the TiO2 film phase composition at room temperature,which directly affected its photocatalytic *** increasing working pressure,the target self-bias decreases ***,low temperature TiO2 phase（anatase） could be deposited with high working *** anatase TiO2 films deposited with 1.4 Pa working pressure displayed the highest photocatalytic activity by the decomposition of Methyl Orange solution,which the degradation rate reached the maximum（35%） after irradiation by ultraviolet light for 1 h.

关键词： TiO2 film anatase UV induced photocatalysis DC pulse magnetron sputtering

Anti-solvent engineering for efficient semitransparent CH3NH3PbBr3 perovskite solar cells for greenhouse applications

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Journal of Energy Chemistry 2019年第7期28卷 12-19页

作者： Waqas Siddique Subhani Kai wang Minyong Du Xiuli wang Ningyi Yuan Jianning ding Shengzhong(Frank)Liu dalian National Laboratory for Clean Energy iChEMDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina University of the Chinese Academy of Sciences Beijing 100039China Key Laboratory of Applied Surface and Colloid Chemistry Ministry of EducationShaanxi Engineering Lab for Advanced Energy TechnologySchool of Materials Science and EngineeringShaanxi Normal UniversityXi'an 710119ShaanxiChina Jiangsu Key Laboratory for Photovoltaic Engineering and Science Changzhou UniversityChangzhou 213164.Jiangsu.China

With ideal combination of benefits that selectively converts high photon energy spectrum into electricity while transmitting low energy photo ns for photos yn thesis,the CH3NH3PbBr3 perovskite solar cell(BPSC)is a promising candidate for efficient greenhouse based building integrated photovoltaic(BIPV)***,the efficiency of BPSCs is still much lower than their theoretical *** general,interface band alignment is regarded as the vital factor of the BPSCs whereas only few reports on enhancing perovskite film *** this work,highly efficient BPSCs were fabricated by improving the crystallization process of CH3NH3PbBr3 with the assistance of anti-solvents.A new anti-solvent of diphenyl ether(DPE)was developed for its strong interaction with the solvents in the perovskite precursor *** using the anti-solvent of DPE,trap-state density of the CH3NH3PbBr3 film is reduced and the electron lifetime is enhanced along with the large-grain crystals compared with the samples from conventional anti-solvent of *** preliminary optimization,the efficiencies of typical and semitransparent BPSCs are improved to as high as 9.54%and 7.51%,*** absorption measurement demonstrates that the cell without metal electrode shows 80%transparency in the wavelength range of 550-1000 nm that is perfect for greenhouse *** that the cell absorbs light in the blue spectrum before 550 nm,it offers very high solar cell efficiency with only 17.8%of total photons,while over 60%of total photons can transm让through for photosynthesis if a transparent electrode can be obtained such as indium doped SnO2.

关键词： CH3NH3PbBr3 Semitransparent perovskite solar cell Anti-solvent Greenhouse