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Optimization of the Production Organization Pattern in Tangshan Iron and Steel Co., Ltd.

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Journal of Iron and Steel Research International 2014年第S1期21卷 17-22页

作者： Zong-xi GU An-jun XU Jin-bao CHANG Shuang-wu LI You-bing xiANG State Key Laboratory of Advanced Metallurgy University of Science and Technology Beijing School of Metallurgy and Ecology Engineering University of Science and Technology Beijing Tangshan Iron and Steel Company of Hebei Iron and Steel Group

High-efficiency production organization should be simple and "laminar". A one to one "laminar flow" operation mechanism is supposed to be accepted as a prerequisite to build high-efficiency clean steel "production platform". Concerning the fact that establishing a one to one "laminar flow" production pattern is impossible at Tangshan Iron and Steel Co., Ltd., "quasi-laminar flow" production pattern was evaluated. Result shows that rolling bar products of various specifications have great impact on the liquid steel supply model between BOF and CC. Considering the process matching issue of steelmaking-continuous casting-rolling process in bar production line, a "quasi-laminar flow" production pattern between BOF and CC was proposed according to different rolling specification in bar mills. Through analysis and research on current production pattern, combined with principles and strategy for BOF workshop control, and taking the plant layout into account, "quasi-laminar flow" production pattern was finally established. Moreover, Gantt chart of "quasi-laminar flow" production pattern was drawn. It is shown that the relative "order degree" of the "quasi-laminar flow" production pattern rises, which is conductive to production scheduling and ladle operation turnaround in comparison with "turbulence" production pattern. While a careful evaluation should be conducted due to the fluctuant temperature drop caused by the inevitable inserted heats and decreased operation rate of inserted BOF before adapting the production pattern.

关键词： steelmaking-casting process matching between converters and continuous casters 'quasi-laminar flow' production pattern Gantt chart

Application of the cortical bone trajectory technique in posterior lumbar fixation

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World Journal of Clinical Cases 2023年第2期11卷 255-267页

作者： Shi-Bo Peng xi-Chuan Yuan Wei-Zhong Lu Ke-xiao Yu Department of Orthopedics Chongqing Nanchuan Hospital of Traditional Chinese MedicineChongqing 408400China Department of Orthopedics Chongqing Hospital of Traditional Chinese MedicineChongqing 400021China

The cortical bone trajectory(CBT) is a novel technique in lumbar fixation and *** unique caudocephalad and medial-lateral screw trajectories endow it with excellent screw purchase for vertebral fixation via a minimally invasive *** combined use of CBT screws with transforaminal or posterior lumbar interbody fusion can treat a variety of lumbar diseases,including spondylolisthesis or stenosis,and can also be used as a remedy for revision surgery when the pedicle screw *** has obvious advantages in terms of surgical trauma,postoperative recovery,prevention and treatment of adjacent vertebral disease,and the surgical treatment of obese and osteoporosis ***,the concept of CBT internal fixation technology appeared relatively recently;consequently,there are few relevant clinical studies,and the long-term clinical efficacy and related complications have not been ***,large sample and prospective studies are needed to further reveal the long-term complications and fusion *** a supplement to the traditional pedicle trajectory fixation technique,the CBT technique is a good choice for the treatment of lumbar diseases with accurate screw placement and strict indications and is thus deserving of clinical recommendation.

关键词： Cortical bone trajectory Management of midle line fusion Lumbar interbody fusion Lumbar surgery Review

Recent progress,mechanisms,and perspectives for crystal and interface chemistry applying to the Zn metal anodes in aqueous zinc-ion batteries

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SusMat 2022年第2期2卷 114-141页

作者： Zhengchunyu Zhang Baojuan xi xiaojian Ma Weihua Chen Jinkui Feng Shenglin xiong School of Chemistry and Chemical Engineering State Key Laboratory of Crystal MaterialsShandong UniversityJinanP.R.China Key Laboratory of Material Processing and Mold of Ministry of Education Zhengzhou UniversityZhengzhouP.R.China Key Laboratory for Liquid−Solid Structural Evolution&Processing of Materials Ministry of EducationSchool of Materials Science and EngineeringShandong UniversityJinanP.R.China

The need for large-scale electrochemical energy storage devices in the future has spawned several new breeds of batteries in which aqueous zinc ion batteries(AZIBs)have attracted great attention due to their high safety,low cost,and excellent electrochemical *** the current research,the dendrite and corrosion caused by aqueous electrolytes are the main problems being ***,the research on the zinc metal anode is still in its *** think it really needs to provide clear guidelines about how to reasonably configure the system of AZIBs to realize high-energy density and long cycle ***,it is worth analyzing the works on the zinc anode,and several strategies are proposed to improve the stability and cycle life of the battery in recent *** on the crystal chemistry and interface chemistry,this review reveals the key factors and essential causes that inhibit dendrite growth and side reactions and puts forward the potential prospects for future work in this *** is foreseeable that guiding the construction of AZIBs with high-energy density and long cycle life in various systems would be quite possible by following this overview as a roadmap.

关键词： crystal chemistry interface chemistry side reaction Zn dendrites Zn metal anode

PREPAKATION OF THERMALLY REVERSIBLE HYDROGELS AND THEIR USE FOR THE IMMOBILIZATION OF CHYMOTRYPSIN

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Chinese Chemical Letters 1992年第10期3卷 797-798页

作者： Feng LIU Ren xi ZHUO Dept.of Chem. Wuhan UnivWuhan430072

A series of hydrogels with lower critical solution temperature (LCST) were prepared and used for the immobilization of chymotrypsin. The activities of the immobilized enzyme decrease when the temperatures are raised a... 详细信息

关键词： LCST NIP PREPAKATION OF THERMALLY REVERSIBLE HYDROGELS AND THEIR USE FOR THE IMMOBILIZATION OF CHYMOTRYPSIN

Review of organic and inorganic pollutants removal by biochar and biochar-based composites

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Biochar 2021年第3期3卷 255-281页

作者： Liping Liang Fenfen xi Weishou Tan Xu Meng Baowei Hu xiangke Wang College of Life Science Shaoxing UniversityShaoxing 312000People’s Republic of China College of Textile and Garment Shaoxing UniversityShaoxing 312000People’s Republic of China

Biochar(BC)has exhibited a great potential to remove water contaminants due to its wide availability of raw materials,high surface area,developed pore structure,and low ***,the application of BC for water remediation has many *** by the intense desire of overcoming unfavorable factors,a growing number of researchers have carried out to produce BC-based composite materials,which not only improved the physicochemical properties of BC,but also obtained a new composite material which combined the advantages of BC and other *** article reviewed previous researches on BC and BC-based composite materials,and discussed in terms of the preparation methods,the physicochemical properties,the performance of contaminant removal,and underlying adsorption *** the recent research progress in the removal of inorganic and organic contaminants by BC and BC-based materials was also systematically *** BC-based composite materials have shown high performance in inorganic or organic pollutants removal,the potential risks(such as stability and biological toxicity)still need to be noticed and further *** the end of this review,future prospects for the synthesis and application of BC and BC-based materials were *** review will help the new researchers systematically understand the research progress of BC and BC-based composite materials in environmental remediation.

关键词： Biochar magnetic composites Nanometallic oxide/hydroxide biochar composites Biochar based 2D membrane 3D biochar-based macrostructures Biological toxicity

Applications of Light Stable Isotopes(C, O, H) in the Study of Sandstone Diagenesis: A Review

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Acta Geologica Sinica(English Edition) 2019年第1期93卷 213-226页

作者： xi Kelai CAO Yingchang LIN Miruo LIU Keyu WU Songtao YUAN Guanghui YANG Tian Key Laboratory of Deep Oil and Gas China University of Petroleum Laboratory for Marine Mineral Resources Qingdao National Laboratory for Marine Science and Technology Research Institute of Petroleum Exploration & Development

This article reviews the applications of light stable isotope, including carbon, oxygen and hydrogen, in thestudies on origin and formation temperature of authigenic carbonate, quartz and clay minerals. Theoretical knowledge andanalytical methods for major light stable isotopes are introduced in detail. Negative and positive δ^(13)C values indicatesignificant differences on the origin of carbonate cements. The δ^(18)O value is an effective palaeotemperature scale forauthigenic minerals formation. Various fractionation equations between δ^(18)O and temperature are proposed for carbonatecements, quartz cements and clay minerals, whose merit and demerit, applicable conditions are clarified clearly. Clumpedisotope analysis can reconstruct the temperature of carbonate precipitation with no requirement on the δ^(18)O of initial waters,which makes temperature calculation of carbonate cements formation more convenient and accurate. Hydrogen and oxygenisotopes mainly reflect the origin of diagenetic fluid for clay mineral formation, providing reliable evidence for diageneticenvironment analysis. This work aims at helping researchers for better understanding the applications of light stable isotopein sandstone diagenesis.

关键词： light stable isotopes carbonate cements quartz cements clay minerals sandstone diagenesis

Symplectic Cyclic Actions on Elliptic Surfaces

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Journal of Mathematical Research and Exposition 2011年第4期31卷 571-577页

作者： Chang Tao XUE xi Min LIU School of Mathematical Sciences Dalian University of Technology Liaoning 116024 Po R. China

Let X = E（n） be the relatively minimal elliptic surface with rational base, where n 〉 2. In this paper, several pseudofree, homologically trivial, symplectic cyclic actions by groups whose orders are 2, 3, 5 and 7 ... 详细信息

关键词： symplectic action fixed-point set elliptic surface locally linear

Characterizing three-dimensional features of Antarctic subglacial lakes from the inversion of hydraulic potential——Lake Vostok as a case study

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Advances in Polar Science 2019年第1期30卷 70-75页

作者： LI Yan LU Yang ZHANG Zizhan SHI Hongling xi Hui State Key Laboratory of Geodesy and Earth's Dynamics Institute of Geodesy and Geophysics Chinese Academy of Sciences University of Chinese Academy of Sciences

To estimate basal water storage beneath the Antarctic ice sheet, it is essential to have data on the three-dimensional characteristics of subglacial lakes. We present a method to estimate the water depth and surface area of Antarctic subglacial lakes from the inversion of hydraulic potential method. Lake Vostok is chosen as a case study because of the diverse and comprehensive measurements that have been obtained over and around the lake. The average depth of Lake Vostok is around 345±4 m. We estimated the surface area of Lake Vostok beneath the ice sheet to be about 13300±594 km^2. The lake consists of two sub-basins separated by a ridge at water depths of about 200–300 m. The surface area of the northern sub-basin is estimated to be about half of that of the southern basin. The maximum depths of the northern and southern sub-basins are estimated to be about 450 and 850 m, respectively. Total water volume is estimated to be about 4658±204 km^3. These estimates are compared with previous estimates obtained from seismic data and inversion of aerogravity data. In general, our estimates are closer to those obtained from the inversion of aerogravity data than those from seismic data, indicating the applicability of our method to the estimation of water depths of other subglacial lakes.

关键词： three-dimensional features Lake Vostok hydraulic potential subglacial water storage

High-g Shocking Testing of the Martlet Wireless Sensing System

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Sound & Vibration 2018年第3期52卷 6-11页

作者： xi Liu xinjun Dong Yang Wang Lauren Stewart Jacob Dodson Bryan Joyce School of Civil and Environmental Engineering Georgia Inst.of TechnologyAtlantaGAUSA Air Force Research Laboratory Munitions DirectorateEglin AFBFLUSA Energy Technology and Materials Division University of Dayton Research Inst.Eglin AFBFLUSA

This article reports the latest development of a wireless sensing system,named Martlet,on high-g shock acceleration *** Martlet sensing node design is based on a Texas Instruments Piccolo microcontroller,with clock frequency programmable up to 90 *** high clock frequency of the microcontroller enables Martlet to support high-frequency data acquisition and high-speed onboard *** addition,the extensible design of the Martlet node conveniently allows incorporation of multiple sensor *** this study,a high-g accelerometer interface board is developed to allow Martlet to work with the selected microelectromechanical system(MEMS)high-g *** low-pass and highpass filters,amplification gains are also implemented on the high-g accelerometer interface *** impact experiments are conducted to validate the performance of the Martlet wireless sensing system with the high-g accelerometer *** results of this study show that the performance of the wireless sensing system is comparable to the cabled system.

关键词： Shock test wireless sensors data acquisition system hydraulic blast actuator Martlet wireless sensing unit