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In situ NMR diffusion coefficients assessment of lithium ion conductor using electrochemical priors and Arrhenius constraint——A computational study

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Chinese Chemical Letters 2017年第2期28卷 362-366页

作者： Liang Deng Wen-Hui Yang Xing Lyu shu-feng wei Zheng Wang Hui-Xian Wang Beijing National Laboratory for Molecular Sciences College of Chemistry and Molecular Engineering Peking University Institute of Electrical Engineering Chinese Academy of Sciences

In situ NMR measurements of the diffusion coefficients,including an estimate of signal strength,of lithium ion conductor using diffusion-weighting pulse sequence are performed in this study.A cascade bilinear model is proposed to estimate the diffusion sensitivity factors of pulsed-field gradient using prior information of the electrochemical performance and Arrhenius *** model postulates that the active lithium nuclei participating electrochemical reaction are relevant to the NMR signal intensity,when discharge rate or temperature condition is *** electrochemical data and the NMR signal strength show a highly fit with the proposed model according our simulation and ***,the diffusion time is constrained by temperature based on Arrhenius equation of reaction rates *** experimental calculation of Li_4Ti_5O_（12）（LTO）/carbon nanotubes（CNTs） with the electrolyte evaluating at 20 ℃ is presented,which the b factor is estimated by the discharge rate.

关键词： Lithium ion conductor Diffusion coefficient Nuclear magnetic resonance Pulsed-field gradient Electrochemical priors

Synthesis and characterization of SBA-15 macrospheres with hierarchical pore structure

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Chinese Chemical Letters 2009年第11期20卷 1371-1375页

作者： Dong Liang Yan Wang Jing Hong Ma Jian Hong Liu shu wei Chen Rui feng Li Key Laboratory of Coal Science and Technology MOE College of Chemistry and Chemical Engineering Taiyuan University of Technology Taiyuan 030024 China

The new macroscopic-scale SBA-15 spheres with diameter of 0.2-0.5 mm are prepared by a sol-gel method, in which the tetrabutylorthosilicate （TBOS） is used as silicon source and triblock copolymer （P123） and polyoxyethylene octylphenol ether （OP- 10） are used as templates. The resulting spherical samples are characterized by XRD, N2 adsorption-desorption, TEM and SEM methods. The results show that the inner structure of SBA-15 macrospheres has macroporous channels （0.5 um） and mesoporous skeleton （4-5 nm）. These SBA-15 macrospheres with the hierarchical pore structure demonstrate high absorption capacity for Emodin molecules.

关键词： Nanostructures Sol-gel growth Electron microscopy Adsorption

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36MnVS4连杆裂解加工模拟及缺陷分析

吉林大学学报（工学版） 2017年第3期47卷 861-868页

作者：寇淑清宋玮峰石舟吉林大学辊锻工艺研究所长春130022

针对具有更高疲劳强度的连杆新材料36MnVS4,开展了连杆裂解加工性能研究,并与C70S6材料进行对比,探究其裂解缺陷形成原因。依据新材料I型裂纹的脆性解理断裂特性,确定了连杆裂解K判据及最大主应力断裂失效准则,建立了预制切口条件下的... 详细信息

针对具有更高疲劳强度的连杆新材料36MnVS4,开展了连杆裂解加工性能研究,并与C70S6材料进行对比,探究其裂解缺陷形成原因。依据新材料I型裂纹的脆性解理断裂特性,确定了连杆裂解K判据及最大主应力断裂失效准则,建立了预制切口条件下的连杆裂解有限元模型。通过分析裂解过程中的应力集中和变形分布情况,获得不同材料的切口起裂位置和时间、切口附近及断面的塑性变形,结合裂纹扩展速度和裂解载荷,研究了容易导致的缺陷类型并评估了断口质量。结果表明:在相同几何参数和载荷下,因36MnVS4连杆较C70S6起裂位置分散、裂纹扩展不稳定、缺口敏感性高、铁素体组织多,容易导致批量生产时裂解工序缺陷增加,但裂解后大头孔失圆和断面塑性变形小。

关键词：材料合成与加工工艺 36MnVS4 连杆裂解加工数值模拟

Effect of order–disorder transition on thermodynamic and electronic properties of σ and χ phases in W–Re alloy: the first-principles calculation

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Tungsten 2025年第1期7卷 195-213页

作者： Zhi-Peng Zhu Dian Jia William Yi Wang Jun-Lei Yin Xing-Yu Gao shu-feng Yang Hai-feng Song Jin-Shan Li State Key Laboratory of Solidification Processing Northwestern Polytechnical University Laboratory of Computational Physics Institute of Applied Physics and Computational Mathematics School of Metallurgical and Ecological Engineering University of Science and Technology Beijing

The Tungsten-Rhenium(W-Re) alloys,celebrated for their high melting point,strength at elevated temperatures,electrical resistivity,and radiation resistance,have been widely utilized in high-temperature components,aerospace,electronics,and nuclear *** constituents of the topologically close-packed(TCP) phases,the sigma phase(σ) and chi phase(χ) formed within W-Re alloys wield considerable influence on the mechanical properties and the stability of the *** calculations were utilized in the present work to explore the structural,thermodynamic,and electronic properties of both ordered and disordered configurations within the σ and χ phases,culminating in a systematic elucidation of the higher phase stability exhibited by the ordered *** is found that the bulk modulus of these two phases is directly proportional to the concentration of Re in the alloy,while the equilibrium volume is inversely *** thermodynamic parameters of the σ and χ phases are calculated via the mean-field potential *** similar trends observed in the isobaric heat capacity,enthalpy increment,and entropy change curves for these two phases suggest they possess comparable thermodynamic *** is noteworthy that the contribution of ionic vibrations predominantly affects the isobaric heat capacity,while the contribution of thermal electronic excitations increases linearly with *** the structure and thermodynamic properties of TCP phases in W-Re alloys at low temperatures has profound significance for optimizing material performance,microstructures features,establishing theoretical foundations,and predicting material behavior.

关键词： First-principles calculations Phase stability TCP phases Thermodynamic properties W–Re alloy

Interaction of major facilitator superfamily domain containing 2A with the blood-brain barrier

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Neural Regeneration Research 2025年第8期20卷 2133-2152页

作者： Yilun Ma Taiwei Dong Fei Luan Juanjuan Yang feng Miao Peifeng wei College of Pharmacy and First Clinical Medical College Shaanxi University of Chinese MedicineXianyangShaanxi ProvinceChina National Drug Clinical Trial Agency The Second Affiliated Hospital of Shaanxi University of Chinese Medicine/Xixian New District Central HospitalXi′anShaanxi ProvinceChina

The functional and structural integrity of the blood-brain barrier is crucial in maintaining homeostasis in the brain microenvironment;however,the molecular mechanisms underlying the formation and function of the blood-brain barrier remain poorly *** major facilitator superfamily domain containing 2A has been identified as a key regulator of blood-brain barrier *** plays a critical role in promoting and maintaining the formation and functional stability of the blood-brain barrier,in addition to the transport of lipids,such as docosahexaenoic acid,across the blood-brain ***,an increasing number of studies have suggested that major facilitator superfamily domain containing 2A is involved in the molecular mechanisms of blood-brain barrier dysfunction in a variety of neurological diseases;however,little is known regarding the mechanisms by which major facilitator superfamily domain containing 2A affects the blood-brain *** paper provides a comprehensive and systematic review of the close relationship between major facilitator superfamily domain containing 2A proteins and the blood-brain barrier,including their basic structures and functions,cross-linking between major facilitator superfamily domain containing 2A and the blood-brain barrier,and the in-depth studies on lipid transport and the regulation of blood-brain barrier *** comprehensive systematic review contributes to an in-depth understanding of the important role of major facilitator superfamily domain containing 2A proteins in maintaining the structure and function of the blood-brain barrier and the research progress to *** will not only help to elucidate the pathogenesis of neurological diseases,improve the accuracy of laboratory diagnosis,and optimize clinical treatment strategies,but it may also play an important role in prognostic *** addition,the effects of major facilitator superfamily domain containing 2A on blood-brain barrier lea

关键词： blood-brain barrier(BBB) caveolin-1 central nervous system docosahexaenoic acid endothelial cells lysophosphatidylcholine major facilitator superfamily domain containing 2A(MFSD2A) transcytosis

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实用LED显示系统的设计与实现

实验科学与技术 2011年第3期9卷 12-13页

作者：魏树峰安徽电子信息职业技术学院软件学院安徽蚌埠233000

讨论了一种LED显示系统设计方案,巧妙地将静态显示方式和动态显示方式结合起来,在使用很少的单片机I/O端口的情况下,可以同时驱动显示多达数十个数码管,并讨论了显示驱动算法逻辑。给出了对数码管阵列进行扩充的基本思路,该方案被应用... 详细信息

讨论了一种LED显示系统设计方案,巧妙地将静态显示方式和动态显示方式结合起来,在使用很少的单片机I/O端口的情况下,可以同时驱动显示多达数十个数码管,并讨论了显示驱动算法逻辑。给出了对数码管阵列进行扩充的基本思路,该方案被应用在笔者开发的一款电子秤中,实际使用证明这个方案能有效节省硬件资源,软件控制逻辑简单,算法实现容易,方案实用性较高。

关键词：单片机数码管显示方式显示电路

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水热结晶法处理含氟废水工艺技术研究与应用

现代化工 2018年第5期38卷 194-197页

作者：金桥舒伟锋贾雪枫肖鹏赵灿湖北省宏源药业科技股份有限公司湖北省氟化工工程技术研究中心湖北黄冈438600

应用水热结晶法对含氟废水进行了研究,结果表明,控制矿化剂投加量为0.04%,反应温度为90~95℃,pH在8左右,反应4 h后,出水氟化物(以F计)浓度降至5 mg/L以下,并稳定存在,满足排放标准要求。另外,实验过程中发现加压至3MPa的情况下,出水氟化... 详细信息

应用水热结晶法对含氟废水进行了研究,结果表明,控制矿化剂投加量为0.04%,反应温度为90~95℃,pH在8左右,反应4 h后,出水氟化物(以F计)浓度降至5 mg/L以下,并稳定存在,满足排放标准要求。另外,实验过程中发现加压至3MPa的情况下,出水氟化物(以F计)浓度甚至能降至1 mg/L,达到饮用水标准。

关键词：氟资源氟污染水热结晶法

Metastable seed-crystals: epitaxial growth of branched-array organic heterostructure nanowires

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Science China Chemistry 2025年

作者： Jin feng Zhen-Yu Geng Ting-Yao Song Ying-Xin Ma Chuan-Zeng Wang wei Zhang Hong-Tao Lin Jin Zhou shu-Ping Zhuo shu-Hai Chen Xue-Dong Wang School of Chemistry and Chemical Engineering Shandong University of Technology Institute of Functional Nano & Soft Materials (FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials & DevicesSoochow University College of Chemistry and Chemical Engineering Hunan Normal University

Tunable light–matter interactions are exhibited by organic low-dimensional crystals, making these crystals a promising platform for organic photonics. However, the precise synthesis of organic low-dimensional crystals remains challenging due to the stochastic nature of molecular nucleation processes. Herein, the directed nucleation process is driven by the introduction of metastable seed-crystals as the trunk, which ultimately leads to branched-array organic heterostructures. The successful formation of organic heterostructures with high-density branched arrays is attributed to the highest attachment energy (Eatt（023）=-104.25 kcal mol-1) of the exposed （023） crystal plane during the seed-crystal growth route. Significantly, these as-prepared heterostructures inherently have an ultralow lattice mismatch ratio η of 0.7%between trunk and branch, which contributes to the multi-channel photon transportation. Therefore, this work provides valuable insights into a versatile synthetic strategy for accessing low-dimensional heterostructures for integrated optoelectronics.

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Depression mechanism of sulfite ions on sphalerite and Pb^(2+)activated sphalerite in the flotation separation of galena from sphalerite

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 335-345页

作者： feng Zhang Chenyang Zhang Linlin Wu wei Sun Hongliang Zhang Jianhua Chen Yong Pei Songjiang Li Engineering Research Center of Ministry of Education for Carbon Emission Reduction in Metal Resource Exploitation and Utilization Hunan International Joint Research Center for Efficient and Clean Utilization of Critical Metal Mineral ResourcesSchool of Minerals Processing and BioengineeringCentral South UniversityChangsha 410083China State Key Laboratory of Mineral Processing Beijing General Research Institute of Mining&MetallurgyBeijing 100160China Hunan Provincial Key Laboratory of Micro&Nano Materials Interfaces Science College of Chemistry and Chemical EngineeringCentral South UniversityChangsha 410083China School of Resources Environment and MaterialsGuangxi UniversityNanning 530004China Department of Chemistry Xiangtan UniversityXiangtan 411105China China Railway Resource Group Co.Ltd Beijing 102300China

The depression mechanism of sulfite ions on sphalerite and Pb^(2+)activated sphalerite in the flotation separation of galena from sphalerite still lacked in-depth ***,the depression mechanism of sulfite ions on sphalerite and Pb^(2+)activated sphalerite in the flotation separation of galena from sphalerite was further systematically investigated with experiments and density functional theory(DFT)*** X-ray photoelectric spectroscopy(XPS)results,DFT calculation results,and frontier molecular orbital analysis indicated that sulfite ions were difficult to be adsorbed on sphalerite surface,suggesting that sulfite ions achieved depression effects on sphalerite through other non-adsorption ***,the oxygen content in the surface of sphalerite treated with sulfite ions in creased,which enhanced the hydrophilicity of the sphalerite and further increased the difference in hydrophilicity between sphalerite and ***,sulfite ions were chelated with lead ions to form PbSO_(3)in *** hydrophilic PbSO_(3)was more easily adsorbed on sphalerite than *** interaction between sulfite ions and lead ions could effectively inhibit the activation of *** addition the UV spectrum showed that after adding sulfite ions,the peak of perxanthate in the sphalerite treated xanthate solution was significantly stronger than that in the galena with xanthate solution,indicating that xanthate interacted more readily with sulfite ions and oxygen mo lecules within the sphalerite system,leading to the formation of ***,sulfite ions hardly depressed the flotation of ga lena and could promote the flotation of galena to some *** study deepened the understanding of the depression mechanism o sulfite ions on sphalerite and Pb^(2+)activated sphalerite.

关键词： sphalerite galena sulfite ion density functional theory depression mechanism