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A novel approach to enhance decrepitation temperature and reducibility of ultrafine iron ore concentrate pellets

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journal of Iron and Steel Research International 2024年第11期31卷 2622-2632页

作者： B.l.Wen Z.H.Fan j.X.li D.l.liu j.l.yang School of Metallurgical Engineering Anhui University of TechnologyMa'anshan 243032AnhuiChina jianlong(liaoning)Energy Saving and Environmental Protection

Utilizing ultrafine iron ore concentrate for pellet production can expand domestic iron ore resources in China and promote the utilization of low-grade ***,a challenge arises with the low decrepitation temperature and reducibility in the preparation process of ultrafine iron ore concentrate *** address the challenge,a novel approach was proposed,which incorporated straw powder as an additive to enhance pellet porosity,thereby improving the decrepitation temper-ature and reducibility of ultrafine iron ore concentrate *** effect of varying proportions of straw powder(0.0-2.0%)on the characteristics of ultrafine iron ore concentrate pellets was *** indicate that at a 2.0%straw powder ratio,pellet decrepitation temperature notably rises from 380 to 540℃,while the reducibility index escalates from 25.7%to 48.1%.Nevertheless,the addition of straw powder results in diminished drop strength,compressive strength of green pellets,and cold crushing strength of fired *** addition,enhanced pellet reducibility leads to exacerbated reduction swelling index and reduction degradation *** these effects,all parameters remain within an acceptable range.

关键词： Ultrafine iron ore concentrate:Straw powder Green pellet quality Decrepitation temperature:Metallurgical property

Elastic-plastic contact force history and response characteristics of circular plate subjected to impact by a projectile

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Acta Mechanica Sinica 2007年第4期23卷 415-425页

作者： l.B.Chen F.Xi j.l.yang Solid Mechanics Research Center,Beihang University,Beijing 100083.China Shandong Institute of Architecture and Engineering,jinan 250014,China Solid Mechanics Research Center Beihang University Beijing 100083 China Shandong Institute of Architecture and Engineering Jinan 250014 China

A new elastic-plastic impact-contact model is proposed in this paper. By adopting the principle of minimum acceleration for elastic-plastic continue at finite deformation, and with the aid of finite difference method, the proposed model is applied in the problem of dynamic response of a clamped thin circular plate subjected to a projectile impact centrally. The impact force history and response characteristics of the target plate is studied in detail. The theoretical predictions of the impact force and plate deflection are in good agreements with those of lDA experimental data. linear expressions of the maximum impact force/transverse deflection versus impact velocity are given on the basis of the theoretical results.

关键词： Elastic-plastic contact model ImpactCircular plate Contact force Minimum principleof acceleration

Rare-earth-niobate high-entropy ceramic foams with enhanced thermal insulation performance

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journal of Materials Science & Technology 2022年第21期116卷 94-102页

作者： R.W.yang Y.P.liang j.Xu X.Y.Meng j.T.Zhu S.Y.Cao M.Y.Wei R.X.Zhang j.l.yang F.Gao State Key laboratory of Solidification Processing MIIT Key Laboratory of Radiation Detection Materials and DevicesSchool of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi’an710072China NPU-QMUl joint Research Institute of Advanced Materials and Structure Northwestern Polytechnical UniversityXi’an710072China State Key laboratory of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing100084China State Key laboratory of Materials Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan430074China

The introduction of porous structures into high-entropy ceramics is expected to further improve its thermal insulation *** this work,a series of novel rare-earth-niobate high-entropy ceramic foams((Dy_(0.2)Ho_(0.2)Y_(0.2)Er_(0.2)Yb_(0.2))_(3)NbO_(7))with hierarchical pore structures were prepared by a particle-stabilized foaming ***-scale analysis reveals that high entropy causes atom displacement and lattice *** high-entropy ceramic foams exhibit high porosity(90.13%-96.13%)and ultralow thermal conductivity(0.0343-0.0592 W/(m·K))at room ***-entropy ceramic foam prepared by a 20 wt%slurry sintered at 1500℃has the porosity of 96.12%and extremely low thermal conductivity of 0.0343 W/(m·K).The existence of walls and secondary pores contributes to reduced thermal *** is a temperature difference of over 800℃between frontside and backside of the sample under fire resistance *** research indicates that these as-prepared high-entropy ceramic foams are expected to be promising thermal insulation materials.

关键词： Rare-earth niobate High-entropy ceramic foams Particle-stabilized foaming Atomic-scale analysis Thermal conductivity

A novel classification method for mild adolescent idiopathic scoliosis using 3D ultrasound imaging

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Medicine in Novel Technology and Devices 2021年第3期11卷 151-161页

作者： D.yang T.T.Y.lee K.K.l.lai Y.S.Wong l.N.Wong j.l.yang T.P.lam R.M.Castelein j.C.Y.Cheng Y.P.Zheng Department of Biomedical Engineering The Hong Kong Polytechnic UniversityHong KongChina SH Ho Scoliosis Research lab Joint Scoliosis Research Center of the Chinese University of Hong Kong and Nanjing UniversityDepartment of Orthopaedics&TraumatologyThe Chinese University of Hong KongHong KongChina Department of Orthopaedic Surgery University Medical Center Utrechtthe Netherlands Spine Center Xinhua Hospital Affiliated to Shanghai Jiaotong University School of MedicineShanghaiChina

Mild adolescent idiopathic scoliosis(AIS),with Cobb<20°,was hypothesized as the right stage to intervene to prevent *** curve can be categorized into either structural or non-structural depending on the spine morphol... 详细信息

Mild adolescent idiopathic scoliosis(AIS),with Cobbl or non-structural depending on the spine morphology(flexibility).Using X-ray to characterize AIS curves remains the clinical gold standard whilecompromising the risks of radiation *** previous works,3D ultrasound imaging had proved the reli-ability of the coronal spinal curvature measurement This research aimed at developing a mild AIs clasificationscheme through examining spine flexibility using 3D ultrasound *** the preliminary study,90 mild AIS subjects(21 M and 69 F;Age:14.5±1.7 years old;Cobb:18.2±6.4°)underwent both 3D ultrasound and X-ray scanning on the same *** each case,a clinician measured Cobbs and denoted major curve as ground *** Asymmetry Index(BAl)was developed to indicate the presence of a possible structural *** curve classification was coded to a modfied lenke classification for mild cases(m-lenke).The results of 3D ultrasound classification were evaluated with the *** was shown that 70.1%of the subjects had identical curve clssification results and 72.0%had the correct major curve ***-dominated curves had distinctive performance(p=0.91,r=0.91)against *** study demonstrated the possibility of a 3D ultrasound-based method for mild AIS curve *** could be partially explained by the limitations of the ultrasound scanning in proximal thoracicreg *** studies will validate the proposed method with a larger cohort.

关键词： AIS classification 3D ultrasound Mild AIS Spine flexibility

A Structural Model for C60 on Metal Surfaces

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电子显微学报 1997年第4期 129-130页

作者： D.liu 1,2 \ \ j.l.yang 1\ \ Z.Q.Wu 1\ \ j.G.Hou 1 (1 Structure Research laboratory and Fundamental Physics Center University of Science and Technology of China,Hefei,Anhui 230026,P.R.China) (2 College of Science and Engineering,Hainan University,Ha

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ＡＳｔｒｕｃｔｕｒａｌＭｏｄｅｌｆｏｒＣ６０ｏｎＭｅｔａｌＳｕｒｆａｃｅｓＤ．Ｌｉｕ１，２Ｊ．Ｌ．Ｙａｎｇ１Ｚ．Ｑ．Ｗｕ１Ｊ．Ｇ．Ｈｏｕ１（１ＳｔｒｕｃｔｕｒｅＲｅｓｅａｒｃｈＬａｂｏｒａｔｏｒｙａｎｄＦｕｎｄａｍｅｎｔａｌＰｈｙｓｉｃｓＣｅｎｔｅｒ...

关键词： Surfaces Model Structural Metal

A Structural Model for C60 on Metal Surfaces

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A Structural Model for C60 on Metal Surfaces

Force and impulse multi-sensor based on flexible gate dielectric field effect transistor

1996年中国青年学者物理学讨论会

作者： D.liu~(1,2) j.l.yang~1 Z.Q.Wu~1 j.G.Hou~1 1 Structure Research laboratory and Fundamental Physics Center University of Science and Technology of China,Hefei,Anhui 230026,P.R.China 2 College of Science and Engineering,Hainan University,Haikou,Hainan 570228,P.R.China

The C/metal interracial system is simplified by using CH to replace C molecule and 10 metal atoms to represent substrates with a proper adsorption *** electron properties,such as the adsorption height,adsorption energy and charge transfer between the adsorbate and substrate,could be calcuated and studied by using this structural model.

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International journal of Minerals,Metallurgy and Materials 2025年第1期32卷 214-220页

作者： Chao Tan junling lü Chunchi Zhang Dong liang lei yang Zegao Wang College of Materials Science and Engineering Sichuan UniversityChengdu 610065China The 54th Research Institute of China Electronics Technology Group Corporation Shijiazhuang 050081China

Nowadays,force sensors play an important role in industrial production,electronic information,medical health,and many other ***-dimensional material-based filed effect transistor(2D-FET)sensors are competitive with nano-level size,lower power consumption,and accurate ***,few of them has the capability of impulse detection which is a path function,expressing the cumulative effect of the force on the particle over a period of *** we fabricated the flexible polymethyl methacrylate(PMMA)gate dielectric MoS_(2)-FET for force and impulse sensor *** systematically investigated the responses of the sensor to constant force and varying forces,and achieved the conversion factors of the drain current signals(I_(ds))to the detected impulse(I).The applied force was detected and recorded by I_(ds)with a low power consumption of~30 *** sensitivity of the device can reach~8000%and the 4×1 sensor array is able to detect and locate the normal force applied on ***,there was almost no performance loss for the device as left in the air for two months.

关键词： flexible gate dielectric transistor force sensor impulse sensor force sensor array

Generation of brain vascular heterogeneity:recent advances from the perspective of angiogenesis

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Neural Regeneration Research 2025年第7期20卷 2013-2014页

作者： Nathanael j.lee Ryota l.Matsuoka Department of Neurosciences Lerner Research InstituteCleveland ClinicClevelandOHUSA Department of Molecular Medicine Cleveland Clinic Lerner College of MedicineCase Western Reserve UniversityClevelandOHUSA

Heterogeneous proper t i es of vascular endothelial cells in the brain:The brain displays large energy dynamics and consumption,and this high level of metabolic demands is fulfilled by a continuous supply of glucose and oxygen through its vascular *** vasculature consists of highly divergent blood vessel branches,giving rise to a dense network of capillaries that supply blood to all cells across the *** elaborated vascular network is thought to develop via angiogenesis,a process in which new blood vessels grow from pre-existing *** capillaries exhibit organotypic features distinct from other tissues and are formed primarily by two major endothelial cell(EC)types:those that form the semi-permeable blood-brain barrier(BBB)and those that develop highly permeable pores known as fenestrae(Matsuoka et al.,2022).The structural and functional differences between BBB and fenestrated vascular ECs represent a fundamental feature of brain vasculature and form the foundation for both brain function and homeostasis.

关键词： angiogenesis homeostasis network

Nanoparticles for the treatment of spinal cord injury

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Neural Regeneration Research 2025年第6期20卷 1665-1680页

作者： Qiwei yang Di lu jiuping Wu Fuming liang Huayi Wang junjie yang Ganggang Zhang Chen Wang Yanlian yang ling Zhu Xinzhi Sun Department of Orthopedic Surgery The First Affiliated Hospital of Zhengzhou UniversityZhengzhouHenan ProvinceChina CAS Key laboratory of Standardization and Measurement for Nanotechnology CAS Key Laboratory for Biomedical Effects of Nanomaterials and NanosafetyCAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijingChina University of Chinese Academy of Sciences BeijingChina Department of Neurosurgery The First Affiliated Hospital of Chongqing Medical UniversityChongqingChina

Spinal cord injuries lead to significant loss of motor, sensory, and autonomic functions, presenting major challenges in neural regeneration. Achieving effective therapeutic concentrations at injury sites has been a slow process, partly due to the difficulty of delivering drugs effectively. Nanoparticles, with their targeted delivery capabilities, biocompatibility, and enhanced bioavailability over conventional drugs, are garnering attention for spinal cord injury treatment. This review explores the current mechanisms and shortcomings of existing treatments, highlighting the benefits and progress of nanoparticle-based approaches. We detail nanoparticle delivery methods for spinal cord injury, including local and intravenous injections, oral delivery, and biomaterial-assisted implantation, alongside strategies such as drug loading and surface modification. The discussion extends to how nanoparticles aid in reducing oxidative stress, dampening inflammation, fostering neural regeneration, and promoting angiogenesis. We summarize the use of various types of nanoparticles for treating spinal cord injuries, including metallic, polymeric, protein-based, inorganic non-metallic, and lipid nanoparticles. We also discuss the challenges faced, such as biosafety, effectiveness in humans, precise dosage control, standardization of production and characterization, immune responses, and targeted delivery in vivo. Additionally, we explore future directions, such as improving biosafety, standardizing manufacturing and characterization processes, and advancing human trials. Nanoparticles have shown considerable progress in targeted delivery and enhancing treatment efficacy for spinal cord injuries, presenting significant potential for clinical use and drug development.

关键词： antioxidants axon regeneration biocompatible materials drug carriers nanoparticles nerve regeneration neuroinflammatory diseases neuroprotection spinal cord injury stem cells