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CO_2 absorption into a phase change absorbent: Water-lean potassium prolinate/ethanol solution

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Chinese journal of Chemical Engineering 2018年第11期26卷 2318-2326页

作者： Yangyang bian Shufeng Shen School of Chemical and Pharmaceutical Engineering Hebei University of Science and Technology

Phase change solvents are attractive energy-efficient absorbents for carbon dioxide(CO_2) capture due to CO_2-rich phase formation. Potassium prolinate + water + ethanol(ProK/W/Eth) solution has shown good capture characteristics as a promising one in our previous work. In this work, absorption rate of CO_2, solubility of N2 O,and heat of absorption for ProK/W/Eth solution were investigated using a stirred cell reactor and a CPA201 reaction calorimeter and these results were also compared with the aqueous ProK and 30 mass% MEA *** ethanol as a solvent can substantially increase the CO_2 physical solubility and the absorption rate of CO_2 in ProK/W/Eth solutions is far higher than that in aqueous 30 mass% MEA solutions especially at a low CO_2 loading range. Solid precipitation, obtained from the liquid-to-solid phase change absorption, was analyzed by13 C NMR and DSC-TGA. The enthalpy change for ProK/W/Eth solutions at various CO_2 loading was also discussed.

关键词： CO2 absorption Phase change absorbent Potassium prolinate Ethanol Heat of absorption

Parameter optimization of controllable local degree of freedom for reducing vibration of flexible manipulator

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Chinese journal of Aeronautics 2013年第2期26卷 487-494页

作者： bian Yushu Gao Zhihui School of Mechanical Engineering and Automation Beihang University State Key Laboratory for Robotics and System (HIT) Harbin Institute of Technology

Parameter optimization of the controllable local degree of freedom is studied for reducing vibration of the flexible manipulator at the lowest possible cost. The controllable local degrees of freedom are suggested and introduced to the topological structure of the flexible manipulator, and used as an effective way to alleviate vibration through dynamic coupling. Parameters introduced by the controllable local degrees of freedom are analyzed and their influences on vibration reduction are investigated. A strategy to optimize these parameters is put forward and the corresponding optimization method is suggested based on Particle Swarm Optimization （PSO）. Simulations are conducted and results of case studies confirm that the proposed optimization method is effective in reducing vibration of the flexible manipulator at the lowest possible cost.

关键词： Degrees of freedom Flexible manipulators Optimization Particle Swarm Optimization Vibration control

Analysis of Stability and Large Deflection Buckle of Rolled Strip by Third Power B-Spline Function Method

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journal of Iron and Steel Research International 1997年第2期4卷 24-28页

作者： bian Yuhong Yanshan University

A new method——the third power B-spline function method is developed to analyse the stability and the buckle of rolled strip under residual *** large deflection theory of thin plate is used to calculate the buckle of rolled strip and criterion of critical buckle is *** computed results tally with those of experiment well,which provides theoretical basis and method for developing the mathematical model of flatness control.

关键词： flatness control large deflection buckle critical buckle third power B-spline function

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Overuse of colorectal cancer screening services in the United States and its implications

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Chinese journal of Cancer 2016年第10期35卷 495-496页

作者： john bian Department of Clinical Pharmacy and Outcomes Sciences South Carolina College of Pharmacy

As a standard way for prevention and early detection of colorectal cancer(CRC), colonoscopy has been used for CRC screening in the United States for more than one decade. An article entitled "Assessing Colorectal Cancer Screening Adherence of Medicare Fee-For-Service Beneficiaries Age 76 to 95 Years" recently published at the journal of Oncology Practice reports the trends in overuse of CRC screening services among average-risk elderly populations at the age of 76–95 years. Several reasons for overusing colonoscopy have been postulated, and some strategies for reducing overuse of CRC screening services have also been proposed.

关键词：大肠癌过度服务美国筛检结直肠癌标准方法平均风险

The formation and evolutionary characteristics of organic matter and pyrites in the continental shales of the 3^(rd)submember of Chang 7 Member,Yanchang formation,Ordos Basin,China

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Energy Geoscience 2024年第2期5卷 31-39页

作者： Ruikang bian State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development Beijing 102206China Key Laboratory of Shale Oil and Gas Exploration&Production Technology SinopecBeijing 102206China SINOPEC Exploration&Production Research Institute Beijing102206China

Through microscopic analyses(e.g.,organic macerals,thin section observation,scanning electron microscope(SEM)imaging of fresh bedding planes via argon ion milling,and energy spectrum tests)combined with Rock-Eval analyses,this study systematically investigated the organic matter and pyrites in the continental shales in the 3^(rd)submember of the Chang 7 Member(Chang 7^(3)submember)in the Yanchang Formation,Ordos Basin and determined their types and the formation and evolutionary *** results are as *** organic matter of the continental shales in the Chang 7^(3)submember is dominated by amorphous bituminites and migrabitumens,which have come into being since the early diagenetic stage and middle diagenetic stage A,*** formation and transformation of organic matter is a prerequisite for the formation of *** Ordos Basin was a continental freshwater lacustrine basin and lacked sulphates in waters during the deposition of the Chang 7 ***,the syndiagenetic stage did not witness the formation of large quantities of *** the basin entered early diagenetic stage A,large quantities of sulfur ions were released as the primary organic matter got converted into bituminites and,accordingly,pyrites started to ***,this stage featured poorer fluid and spatial conditions compared with the syndepositional stage due to withdraw of water,the partial formation of bituminites,and a certain degree of *** a result,large quantities of pyrrhotite failed to transition into typical spherical framboidal pyrites but grew into euhedral monocrystal *** addition,pyrites are still visible in the migrabitumens in both microfractures and inorganic pores of mudstones and shales,indicating that the pyrite formation period can extend until the middle diagenetic stage A.

关键词： Organic matter Pyrite Formation and evolution Continental shale Chang 7^(3)submember Ordos Basin

Angiotensin-converting enzyme 2(ACE2):SARS-CoV-2 receptor and RAS modulator

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Acta Pharmaceutica Sinica B 2021年第1期11卷 1-12页

作者： jingwei bian Zijian Li Department of Cardiology and Institute of Vascular Medicine Peking University Third HospitalKey Laboratory of Cardiovascular Molecular Biology and Regulatory PeptidesMinistry of HealthKey Laboratory of Molecular Cardiovascular SciencesMinistry of EducationBeijing Key Laboratory of Cardiovascular Receptors ResearchBeijing 100191China Department of Pharmacy Peking University Third HospitalBeijing 100191China

The coronavirus disease 2019(COVID-19)outbreak is caused by severe acute respiratory syndrome coronavirus 2(SARS-CoV-2).Angiotensin-converting enzyme 2(ACE2)was rapidly identified as the critical functional receptor for ***2 is well-known as a counter-regulator of the renin-angiotensin system(RAS)and plays a key role in the cardiovascular *** that ACE2 functions as both a SARS-CoV-2 receptor and a RAS modulator,the treatment for COVID-19 presents a dilemma of how to limit virus entry but protect ACE2 physiological ***,an in-depth summary of the recent progress of ACE2 research and its relationship to the virus is urgently needed to provide possible solution to the ***,we summarize the complexity and interplay between the coronavirus,ACE2 and RAS(including anti-RAS drugs).We propose five novel working modes for functional receptor for SARS-CoV-2 infection and the routes of ACE2-mediated virus entering host cells,as well as its regulatory *** the controversy of anti-RAS drugs application,we also give theoretical analysis and discussed for drug *** will contribute to a deeper understanding of the complex mechanisms of underlying the relationship between the virus and ACE2,and provide guidance for virus intervention strategies.

关键词： SARS-CoV-2 Angiotensin-converting enzyme 2 Renin-angiotensin system Receptor Modulator COVID-19 Anti-RAS drug Drug target

Isoconversional kinetic analysis of decomposition of bastnaesite concentrates with calcium hydroxide

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journal of Rare Earths 2020年第12期38卷 1361-1371页

作者： Peng Cen Xue bian Wenyuan Wu School of Metallurgy Northeastern UniversityShenyang 110819China

Isoconversional methods combined with thermogravimetry were applied to investigate the decomposition kinetics of bastnaesite concentrates with different amounts of calcium hydroxide *** apparent activation energy was calculated,and the results indicate that the overall reaction involves more than one single *** reaction with a lower content(15 wt%)involves another step which denotes the decomposition of newly formed calcium carbonate during *** activation energy increases with increasing amount of calcium hydroxide in the lower range(0-15 wt%).This is due to the resistance of calcium hydroxide to heat and mass transport,However,more calcium can promote the decomposition reaction more effectively and thus reduce the activation *** fitting was performed by fitting the experimental data to Avrami-Erofeev model to determine the reaction model and pre-exponential *** theoretical models were proven to be reliable for kinetic prediction.

关键词： Bastnaesite Thermal analysis kinetics Isoconversional method Calcium hydroxide Rare earths

Simplified creation of polyester fabric supported Fe-based MOFs by an industrialized dyeing process: Conditions optimization, photocatalytics activity and polyvinyl alcohol removal

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journal of Environmental Sciences 2022年第6期34卷 52-67页

作者： Liran bian Yongchun Dong Biao jiang Division of Textile Chemistry and Environmental Care School of Textile Science and EngineeringTiangong UniversityTianjin 300387China Key Laboratory of Advanced Textile Composite of Ministry of Education Tiangong UniversityTianjin 300387China

MIL-53(Fe) was successfully prepared and deposited on the surface carboxylated polyester(PET) fiber by an optimized conventional solvothermal or industrialized high temperature pressure exhaustion(HTPE) process to develop a PET fiber supported MIL-53(Fe) photocatalyst(MIL-Fe@PET) for the degradation of polyvinyl alcohol(PVA) in water under light emitting diode(LED) visible irradiation. On the basis of several characterizations, MIL-Fe@PET was tested for the photocalytic ability and degradation mechanism. It was found that temperature elevation significantly enhanced the formation and deposition of MIL-53(Fe) with better photocatalytic activity. However, higher temperature than 130℃ was not in favor of its photocatalytic activity. Increasing the number of surface carboxyl groups of the modified PET fiber could cause a liner improvement in MIL-53(Fe) loading content and photocatalytic ability. High visible irradiation intensity also dramatically increased photocatalytic ability and PVA degradation efficiency of MIL-Fe@PET. Na_(2)S_(2)O_(8) was used to replace H_(2)O_(2) as electron acceptor for further promoting PVA degradation in this system. MIL-Fe@PET prepared by HTPE process showed higher MIL-53(Fe) loading content and slightly lower PVA degradation efficiency than that prepared by solvothermal process at the same conditions. These findings provided a practical strategy for the large-scale production of the supported MIL-53(Fe) as a photocatalyst in the future.

关键词： MIL-53(Fe) Polyester fabric Exhaustion dyeing Visible light photocatalyst Polyvinyl alcohol removal

MEDIUM-RANGE ORDER CLUSTERS IN Fe-2.0%C ALLOY MELT

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Acta Metallurgica Sinica(English Letters) 2003年第6期16卷 513-518页

作者： X.B.Qin S.j.Cheng X.F.bian KeyLaboratoryofLiquidStructureandHeredityofMaterials MinistryofEducationShandongUniversityJi‘nan250061China MechanicalEngineeringDepartment ShandongUniversityofTechnologyZibo255000China

The structure of Fe-2.0%C alloy melt was investigated at 1580, 1560, 1540 and 1450℃ by using an X-ray diffractometer respectively. The results showed that with decreasing temperature, the average atoms of cluster, the coordination numbers, the correlation radius and the atom density increased, whereas the pre-peak of the structure factors curve remained almost at the same position. The appearance of the pre-peak indicated that the liquid structure and the solid structure of the Fe-2.0%C alloy were correlated.

关键词： liquid structure X-ray diffraction micro-inhomogeneous model,pre-peak structure factor