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Fabrication and sintering behavior of high-nitrogen nickel-free stainless steels by metal injection molding

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International Journal of Minerals,Metallurgy and Materials 2010年第4期17卷 423-428页

作者： Zi-wei Xu Cheng-chang Jia chun-jiang kuang Xuan-hui Qu School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China Powder Metallurgy Division Advanced Technology ＆ Materials Co. Ltd. Beijing 100081 China

High-nitrogen nickel-free stainless steels were fabricated by the metal injection molding technique using high nitrogen alloying powders and a mixture of three polymers as *** of metal powders and binders with various proportions were also investigated, and an optimum powder loading capacity was determined as 64vol%.Intact injection molded compacts were successfully obtained by regulating the processing *** debinding process for molded compacts was optimized with a combination of thermo-gravimetric analysis and differential scanning calorimetry *** optimum relative density and nitrogen content of the specimens are obtained at 1360℃,which are 97.8%and 0.79wt%,respectively.

关键词： metal injection molding debinding stainless steel sintering behavior sintered density nitrogen content

Control of wall thickness and surface morphology of tungsten thin wall parts by adjusting selective laser melting parameters

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Journal of Iron and Steel Research International 2019年第2期26卷 182-190页

作者： Yan-jun Xie Huai-chao Yang Xue-bing Wang Lin Zhao chun-jiang kuang Wei Han Central Iron and Steel Research Institule Beijing 100081China Advanced Technology&Materials Co. Ltd.Beijing 100081China

The tungsten thin wall parts which were used as high-performance collimator devices were fabricated by optimizing selective laser melting laser *** effect of laser power and scan rate on wall thickness and surface morphology of tungsten山in wall parts was investigated,*** results indicated that the wall thickness increased with the enhancemem in laser power as a linear *** the contrary,the wall thickness decayed exponentially with the acceleration in laser sean ***,the wall thickness of the parts fabricated by laser double-pass melting was ihinner than that fabricated by laser single-pass *** addition,mathematic models for selecting suitable laser power and laser sean rate to fabricate specified tungsten thin wall parts were ***,the effects of laser parameters on the top surface roughness,adhesive parts and hot cracks were also discussed.

关键词： Selective laser melting Tungsten Laser power Scan rate Thin wall part Surface morphology

Homozygous phytosterolemia and a literature review:A case report

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World Journal of Clinical Cases 2025年第10期13卷 46-52页

作者： chun-Xin jiang Guang Yang Lian-Ping Shi Peng-Yu Su Department of Cardiovascular North China University of Science and Technology Affiliated HospitalTangshan 063000Hebei ProvinceChina

BACKGROUND Phytosterolemia,also known as sitosterolemia,is a rare autosomal recessive disease characterized by elevated plasma plant sterol levels and xanthomata,which is easily misdiagnosed as familial *** with homozygous phytosterolemia often have severe clinical manifestations,with xanthomata in childhood and premature *** patient had a milder clinical *** SUMMARY This report describes a patient with homozygous phytosterolemia who presented with only elevated cholesterol and low-density lipoprotein cholesterol(LDL-C)without xanthomata,arteriosclerosis,or hematological *** mutation of ABCG5 which encodes an ATP-binding cassette transporter,was detected by whole exome sequencing and diagnosed as *** of the patient’s plasma plant sterol levels detected significant elevations in stigmasterol,rapeseed oil-derived plant sterol,andβ-glutaminol *** was started and a low plant sterol diet was *** patient’s blood lipid profile was reexamined one month later and showed significant decreases in total cholesterol and LDL-C *** has similar clinical features as familial hypercholesterolemia,is highly susceptible to misdiagnosis,and has a very low incidence,and therefore clinicians need to consider a genetic diagnosis of a definitively hyperlipidemic disorder when statin drugs fail to lower lipid *** Phytosterolemia is easily misdiagnosed as familial hypercholesterolaemia and can be treated by dietary modification and cholesterol absorption inhibitors to lower blood lipids.

关键词： Hypercholesterolemia Cholesterol Low-density lipoprotein Phytosterolemia Liquid chromatography ABCG5/ABCG8 Sitosterolemia

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基于刻蚀处理的池沸腾传热性能实验研究

原子与分子物理学报 2025年第3期42卷 180-188页

作者：王菊萍匡纯纯刘妮上海理工大学制冷技术研究所上海200093

为探究刻蚀处理铜板表面对池沸腾传热性能的改善效果,搭建了可视化实验平台,制备不同刻蚀浓度和刻蚀时间处理的表面,采用去离子水为工质,进行饱和池沸腾实验.结果表明,氨水刻蚀浓度越大,表面的换热性能越强,氨水刻蚀时间越长,表面换热... 详细信息

为探究刻蚀处理铜板表面对池沸腾传热性能的改善效果,搭建了可视化实验平台,制备不同刻蚀浓度和刻蚀时间处理的表面,采用去离子水为工质,进行饱和池沸腾实验.结果表明,氨水刻蚀浓度越大,表面的换热性能越强,氨水刻蚀时间越长,表面换热性能越强.热流密度为43.2 W/cm^(2)时,0.05 mol/L氨水刻蚀4 h表面、0.05 mol/L氨水刻蚀5 h表面、0.05 mol/L氨水刻蚀8 h表面、0.03 mol/L氨水刻蚀4 h表面、0.05 mol/L氨水刻蚀4 h表面和0.10 mol/L氨水刻蚀4 h表面上的换热系数分别提高了46%、92%、105%、36%、45%、78%.此外,对其表面进行表征,结果说明了其优异的沸腾性能.刻蚀处理增强了表面粗糙度,有效面积,从而促进液体的补充,能够在较小的过热度下达到更高的临界热流密度.可视化研究结果表明,刻蚀表面具有更多的成核位点,更小的气泡离开直径和离开频率.这些结果显示出刻蚀表面强化池沸腾换热的潜力.

关键词：池沸腾刻蚀传热性能气泡动力学微纳结构表面

Accelerating fully resolved simulation of particle-laden flows on heterogeneous computer architectures

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Particuology 2023年第10期81卷 25-37页

作者： kuang Ma Maoqiang jiang Zhaohui Liu State Key Laboratory of Coal Combustion School of Energy and Power EngineeringHuazhong University of Science and TechnologyWuhan430074China Department of Mechanical Engineering National University of Singapore117575Singapore

An efficient computing framework,namely PFlows,for fully resolved-direct numerical simulations of particle-laden flows was accelerated on NVIDIA General Processing Units(GPUs)and GPU-like accelerator(DCU)*** framework is featured as coupling the lattice Boltzmann method for fluid flow with the immersed boundary method for fluid-particle interaction,and the discrete element method for particle collision,using two fixed Eulerian meshes and one moved Lagrangian point mesh,*** the parts are accelerated by a fine-grained parallelism technique using CUDA on GPUs,and further using HIP on DCU cards,i.e.,the calculation on each fluid grid,each immersed boundary point,each particle motion,and each pair-particle collision is responsible by one computer thread,*** memory accesses to LBM distribution functions with the data layout of Structure of Arrays are used to maximize utilization of hardware *** reduction with shared memory for data of immersed boundary points is adopted for the sake of reducing access to global memory when integrate particle hydrodynamic *** computing is further used for computing on heterogeneous architectures with multiple CPUs-GPUs/*** communications between adjacent processors are hidden by overlapping with *** benchmark cases were conducted for code validation,including a pure fluid flow and a particle-laden *** performances on a single accelerator show that a GPU V100 can achieve 7.1–11.1 times speed up,while a single DCU can achieve 5.6–8.8 times speed up compared to a single Xeon CPU chip(32 cores).The performances on multi-accelerators show that parallel efficiency is 0.5–0.8 for weak scaling and 0.68–0.9 for strong scaling on up to 64 DCU cards even for the dense flow(φ=20%).The peak performance reaches 179 giga lattice updates per second(GLUPS)on 256 DCU cards by using 1 billion grids and 1 million *** last,a large-scale simulation of a gas-solid flow wit

关键词： Lattice Boltzmann method Immersed boundary method Particle-ladenflows Heterogeneous acceleration General Processing Units

Rapid progressive vaccine-induced immune thrombotic thrombocytopenia with cerebral venous thrombosis after ChAdOx1 nCoV-19(AZD1222)vaccination:A case report

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World Journal of Clinical Cases 2022年第26期10卷 9462-9469页

作者： Shin-kuang jiang Wei-Liang Chen chun Chien Chi-Syuan Pan Sheng-Ta Tsai Department of Neurology China Medical University HospitalTaichung 404332Taiwan Department of Radiology China Medical University HospitalTaichung 404332Taiwan Department of Neurology China Medical University Hsinchu HospitalHsinchu 30272Taiwan Department of Emergency China Medical University HospitalTaichung 404332Taiwan Neuroscience and Brain Disease Center China Medical UniversityTaichung 404332Taiwan

BACKGROUND Vaccine-induced immune thrombotic thrombocytopenia(VITT)is a rare and potentially life-threatening condition after receiving coronavirus disease *** is characterized by symptom onset at 5 to 30 d postvaccination,thrombocytopenia,thrombosis,high D-dimer level,and antiplatelet factor 4(anti-PF4)antibody *** can progress very fast,requiring urgent *** few studies have described its detailed clinical course and imaging *** report a typical VITT case in a patient who underwent regular repeated brain imaging *** SUMMARY A young woman presented with headaches at 7 d after the ChAdOx1 nCoV-19vaccine(AZD1222)*** then showed progressive symptoms of left upper limb *** computed tomography revealed venous infarction at the right parietal lobe with a hyperacute thrombus in the cortical *** hours later,brain magnetic resonance imaging revealed hemorrhage at the same *** resonance venography showed an irregular contour of the right transverse *** examination revealed a high D-dimer level,thrombocytopenia,and a high titer for anti-PF4 *** was treated with anticoagulants,intravenous immunoglobulin,and steroids and analgesic agents were administered for pain *** had a marked improvement on headaches and clumsiness after treatment along with radiological thrombus *** follow-up at the outpatient department,her modified Rankin scale at 90 d was *** Clinicians should be alerted whenever patients present with persistent and progressive headaches or focal motor/sensory deficits postvaccination.

关键词： Vaccine-induced immune thrombotic thrombocytopenia Intracranial Sinus Thrombosis ChAdOx1 nCoV-19 vaccine(AZD1222) Headache Serial brain image Case report

Anisotropic Curl-free Wavelet Bases on the Unit Cube

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Acta Mathematica Sinica,English Series 2013年第4期29卷 801-814页

作者： Ying chun jiang School of Mathematics and Computational Science Guilin University of Electronic Technology

This paper deals with the construction of anisotropic curl-free wavelets on the cube [0,1]3, which satisfies the specific boundary conditions. First, one constructs curl-free wavelets on the unit cube based on one dimensional wavelets on the interval [0,1] with some boundary conditions. Then, the stability of the corresponding wavelets in curl-free space and the characterization of Sobolev spaces are studied. Finally, one gives a Helmholtz decomposition and the representation of curl and div operators in wavelet coordinates.

关键词： Wavelets anisotropic curl-free cube Helmholtz decomposition

Endothelial progenitor cells and coronary artery disease:Current concepts and future research directions

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World Journal of Clinical Cases 2021年第30期9卷 8953-8966页

作者： Sen-Tong Xiao chun-Yan kuang Department of Cardiovascular Diseases People’s Hospital Affiliated to Guizhou Medical UniversityGuiyang 550003Guizhou ProvinceChina kuang Department of Cardiovascular DiseasesGuizhou Provincial People's HospitalGuiyang 550003Guizhou ProvinceChina

Vascular injury is a frequent pathology in coronary artery *** repair the vasculature,scientists have found that endothelial progenitor cells(EPCs)have excellent properties associated with *** time,research on EPCs has made encouraging progress regardless of pathology or clinical *** review focuses on the origins and cell markers of EPCs,and the connection between EPCs and coronary artery *** addition,we summarized various studies of EPC-capturing stents and EPC infusion therapy,and aim to learn from past technology to predict the future.

关键词： Endothelial progenitor cells Coronary disease Endothelial progenitor-cell capture stents Endothelial progenitor-cell infusion Clinical application

Synthesis and Crystal Structure of a Novel Manganese Coordination Polymer Constructed by 3,5-Dimethylbenzoic Acid with 4,4'-Bipyridine

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Chinese Journal of Structural Chemistry 2006年第10期25卷 1213-1216页

作者： ZHANG chun-Hua CHEN Man-Sheng kuang Dai-Zhi Department of Chemistry and Materials Science Hengyang Normal University Hengyang 421008 China

A novel manganese coordination polymer [Mn（L）2（bipy）]n （HL = 3,5-dimethylbenzoic acid, 4,4＇-bipy = 4,4＇-bipyridine） has been synthesized by a hydrothermal method. The molecular and crystal structures were determined by single-crystal X-ray diffraction. The crystal is of monoclinic, space group C2/c with a = 2.0996（8）, b = 1,1835（5）, c = 0.9958（4） nm, β = 110.161（5）°, V = 2,3229（16） nm^3, Z = 4, C28H26MnN2O4, Mr = 509.45, Dc= 1.457 g/cm^3,μ = 0.607 mm^-1, F（000） = 1060, Rim = 0.0566, R = 0.0334 and wR = 0.1078. In the crystal the manganese atom is six-coordinated by two nitrogen atoms from 4,4＇-bipy and four oxygen atoms from 3,5-dimethylbenzolate molecules, completing an octahedral geometry. The 4,4＇-bipy molecules bridge the infinite chain [Mn（L）2（bipy）]n to form a two-dimensional layer.

关键词： manganese coordination polymer hydrothermal synthesis crystal structure