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Tungsten 2024年第4期6卷 759-766页

作者： Tao Yang Hao Wang Fan Feng Xiang Liu xue-yu gong You-yun Lian Jian-Bao Wang School of Nuclear Science and Technology University of South ChinaHengyang421001China Southwestern Institute of Physics Chengdu610041China

Tungsten-based materials are one of the most important candidates for the plasma facing materials(PFMs)of future fusion reactors,and it is necessary to study the properties of tungsten-based materials under the service conditions of fusion devices to ensure the long-term steady-state operation of future fusion *** this paper,different tungsten-based materials made by the same rotary swaging process are selected to simulate the transient thermal loads on the PFMs of a fusion reactor using an electron beam,and thermal load experiments are carried out by changing the power density of a loading pulse and the pulse *** is found that different tungsten-based materials made by the same process have large differences in thermal shock resistance,and the doped tungsten materials(W-K and W-La_(2)O_(3))are significantly better than the pure tungsten materials with the increase in thermal shock power density and the number of cycles,especially the W-K materials,which have excellent performance.

关键词： Rotary swaging Tungsten materials Electron beam Thermal shock

α-Si：H/SiNx叠层薄膜对晶体硅太阳电池的钝化

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物理学报 2013年第19期62卷 534-538页

作者：郑雪余学功杨德仁浙江大学硅材料国家重点实验室杭州310027

利用等离子增强化学气相沉积法在硅衬底上制备了α-Si:H/SiNx叠层薄膜用来钝化晶体硅太阳电池.用有效少子寿命表征薄膜的钝化效果,通过模拟高频电容-电压测试结果分析薄膜钝化的机理.将α-Si:H/SiNx薄膜的钝化效果与使用相同方法制备的... 详细信息

利用等离子增强化学气相沉积法在硅衬底上制备了α-Si:H/SiNx叠层薄膜用来钝化晶体硅太阳电池.用有效少子寿命表征薄膜的钝化效果,通过模拟高频电容-电压测试结果分析薄膜钝化的机理.将α-Si:H/SiNx薄膜的钝化效果与使用相同方法制备的α-Si:H薄膜进行对比,发现α-Si:H/SiNx薄膜的钝化效果明显优于α-Si:H薄膜.不同温度下热处理后,α-Si:H/SiNx薄膜的钝化效果随着温度的上升先提高后降低.在最佳热处理温度300°C下进行热处理,α-Si:H/SiNx薄膜的钝化效果能在90 min内始终保持优于α-Si:H薄膜.模拟计算结果表明,α-Si:H/SiNx薄膜的钝化效果与α-Si:H/Si界面处的态密度有关.

关键词：太阳电池钝化 α-Si:H/SiNx薄膜热处理

等离子体电流反向平衡位形中带电粒子运动的数值模拟研究

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原子能科学技术 2016年第11期50卷 1921-1927页

作者：钟翊君龚学余龚蕾李新霞尹陈艳南华大学湖南衡阳421001 福清核电站福建福清350300

本文采用数值方法求解Grad-Shafranov方程获得CT-6B交流放电实验总电流过零时的平衡位形和磁场分布,进而结合粒子在磁场中的运动方程,模拟氘离子在该平衡位形中的运动轨迹,统计氘离子的损失率与损失位置。结果表明:总电流过零时刻的平... 详细信息

本文采用数值方法求解Grad-Shafranov方程获得CT-6B交流放电实验总电流过零时的平衡位形和磁场分布,进而结合粒子在磁场中的运动方程,模拟氘离子在该平衡位形中的运动轨迹,统计氘离子的损失率与损失位置。结果表明:总电流过零时刻的平衡位形为内外两侧电流反向平衡位形,在强、弱场侧各存在1个磁岛,电流在磁岛附近取极值;位于强场侧的粒子几乎不损失,弱场侧的粒子在径向位置很大时存在损失,越靠近边界损失率越高;损失位置基本上位于赤道面以下并在最底部达到极值;随初始角变大,氘离子轨迹由通行轨迹变成损失轨迹再向香蕉轨迹演变。

关键词：平衡位形离子轨迹损失率

Precipitation and gettering behaviors of copper in multicrystalline silicon used for solar cells

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Transactions of Nonferrous Metals Society of China 2011年第3期21卷 691-696页

作者：李晓强杨德仁余学功阙端麟浙江大学材料科学与工程学系硅材料国家重点实验室杭州310027

The precipitation and gettering behaviors of copper （Cu） at different defective regions in multicrystalline silicon were investigated by combining scanning infrared microscopy, optical microscopy, inductively coupled plasma mass spectrometry and microwave photo-conductance decay. It is found that the behaviors of Cu precipitation are strongly dependent on the defect density. Most of the Cu contaminants tend to form precipitates homogeneously in the low density defect region, while they mostly segregate at the defects and form precipitates heterogeneously in the high density defect region. In the case of heavy contamination, the Cu precipitate can significantly reduce the carrier lifetime of multicrystalline silicon due to their Schottkydiode behavior in the silicon substrate. A 900 °C rap thermal process （RTP） phosphorus gettering anneal cannot be sufficiently effective to remove the Cu precipitates in these two regions.

关键词： multicrystalline silicon Cu precipitate phosphorus gettering defects carrier lifetime

Hypoxia-preconditioned bone marrow-derived mesenchymal stem cells protect neurons from cardiac arrest-induced pyroptosis

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Neural Regeneration Research 2025年第4期20卷 1103-1123页

作者： Xiahong Tang Nan Zheng Qingming Lin Yan You Zheng gong Yangping Zhuang Jiali Wu yu Wang Hanlin Huang Jun Ke Feng Chen Shengli Clinical Medical College of Fujian Medical University Fujian Medical UniversityFuzhouFujian ProvinceChina Department of Emergency Fujian Provincial HospitalFuzhouFujian ProvinceChina Fujian Provincial Key Laboratory of Emergency Medicine FuzhouFujian ProvinceChina The Second Department of Intensive Care Unit Fujian Provincial Hospital South BranchFuzhouFujian ProvinceChina

Cardiac arrest can lead to severe neurological impairment as a result of inflammation,mitochondrial dysfunction,and post-cardiopulmonary resuscitation neurological *** preconditioning has been shown to improve migration and survival of bone marrow–derived mesenchymal stem cells and reduce pyroptosis after cardiac arrest,but the specific mechanisms by which hypoxia-preconditioned bone marrow–derived mesenchymal stem cells protect against brain injury after cardiac arrest are *** this end,we established an in vitro co-culture model of bone marrow–derived mesenchymal stem cells and oxygen–glucose deprived primary neurons and found that hypoxic preconditioning enhanced the protective effect of bone marrow stromal stem cells against neuronal pyroptosis,possibly through inhibition of the MAPK and nuclear factor κB ***,we transplanted hypoxia-preconditioned bone marrow–derived mesenchymal stem cells into the lateral ventricle after the return of spontaneous circulation in an 8-minute cardiac arrest rat model induced by *** results showed that hypoxia-preconditioned bone marrow–derived mesenchymal stem cells significantly reduced cardiac arrest–induced neuronal pyroptosis,oxidative stress,and mitochondrial damage,whereas knockdown of the liver isoform of phosphofructokinase in bone marrow–derived mesenchymal stem cells inhibited these *** conclude,hypoxia-preconditioned bone marrow–derived mesenchymal stem cells offer a promising therapeutic approach for neuronal injury following cardiac arrest,and their beneficial effects are potentially associated with increased expression of the liver isoform of phosphofructokinase following hypoxic preconditioning.

关键词： bone marrow–derived mesenchymal stem cells cardiac arrest cardiac resuscitation hypoxic preconditioning liver isoform of phosphofructokinase mitochondria neuroinflammation oxidative stress pyroptosis reactive oxygen species

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高中地理教学中开展德育渗透的主要方面

教育教学论坛 2017年第33期 42-43页

作者：胡庆玲于学工刘晓淄博市张店区第一中学山东淄博255049 淄博市教研室山东淄博255049 山东理工大学山东淄博255073

德育在整个高中地理教学中具有重要的地位,是渗透德育的主要渠道之一。在高中地理课堂教学中,我们应本着符合学生认知需求的原则,通过挖掘教材内容,从各方面进行德育教育的渗透。本文对高中地理教学中开展德育渗透的意义及主要目标进行... 详细信息

德育在整个高中地理教学中具有重要的地位,是渗透德育的主要渠道之一。在高中地理课堂教学中,我们应本着符合学生认知需求的原则,通过挖掘教材内容,从各方面进行德育教育的渗透。本文对高中地理教学中开展德育渗透的意义及主要目标进行总结,并列举了高中地理德育教育的典型内容,为高中地理德育渗透构造提供了借鉴。

关键词：高中地理德育渗透知识点

Potassium and calcium channels in different nerve cells act as therapeutic targets in neurological disorders

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Neural Regeneration Research 2025年第5期20卷 1258-1276页

作者： Qing Qiu Mengting Yang Danfeng gong Haiying Liang Tingting Chen Department of Pharmacology School of PharmacyNantong UniversityNantongJiangsu ProvinceChina Jiangsu Province Key Laboratory of Inflammation and Molecular Drug Target NantongJiangsu ProvinceChina Department of Pharmacy Longyan First Affiliated Hospital of Fujian Medical UniversityLongyanFujian ProvinceChina

The central nervous system, information integration center of the body, is mainly composed of neurons and glial cells. The neuron is one of the most basic and important structural and functional units of the central nervous system, with sensory stimulation and excitation conduction functions. Astrocytes and microglia belong to the glial cell family, which is the main source of cytokines and represents the main defense system of the central nervous system. Nerve cells undergo neurotransmission or gliotransmission, which regulates neuronal activity via the ion channels, receptors, or transporters expressed on nerve cell membranes. Ion channels, composed of large transmembrane proteins, play crucial roles in maintaining nerve cell homeostasis. These channels are also important for control of the membrane potential and in the secretion of neurotransmitters. A variety of cellular functions and life activities, including functional regulation of the central nervous system, the generation and conduction of nerve excitation, the occurrence of receptor potential, heart pulsation, smooth muscle peristalsis, skeletal muscle contraction, and hormone secretion, are closely related to ion channels associated with passive transmembrane transport. Two types of ion channels in the central nervous system, potassium channels and calcium channels, are closely related to various neurological disorders, including Alzheimer's disease, Parkinson's disease, and epilepsy. Accordingly, various drugs that can affect these ion channels have been explored deeply to provide new directions for the treatment of these neurological disorders. In this review, we focus on the functions of potassium and calcium ion channels in different nerve cells and their involvement in neurological disorders such as Parkinson's disease, Alzheimer's disease, depression, epilepsy, autism, and rare disorders. We also describe several clinical drugs that target potassium or calcium channels in nerve cells and could be u

关键词： astrocytes calcium channels central nervous system extracellular ion concentration microglia neurological disorders neurons potassium channels

Mobile Content Distribution with Vehicular Cloud in Urban VANETs

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China Communications 2016年第8期13卷 84-96页

作者： Haigang gong Lingfei yu Nianbo Liu xue Zhang School of Computer Science and Engineering University of Electronic Science and Technology of China Big Data Research Center of UESTC University of Electronic Science and Technology of China Hangzhou College of Commerce Zhejiang Gongshang University

Plenty of multimedia contents such as traffic images, surveillance video, music and movie will flood into vehicular ad hoc networks. However, content distribution over VANETs is not a easy task, due to the high mobility of vehicles and intermittent connectivity. Infrastructure-based scheme can relieve the problem, but with a large amount of investment. In this paper, we propose a mobile content distribution scheme based on roadside parking cloud(RPC), which is formed by the parked car on the roadside, and mobile cloud(MC), which is formed by moving cars on the road. According to a trip history model, a mobile car can estimate its following trajectory. When it wants to download the content, gateway node of the RPC will work out a downloading schedule, which tells it how much chunks it can download from which RPCs. Moreover, the helper of the mobile car in mobile cloud would deliver specified chunks to it when there is lack of RPC in the following trip. Simulation results show that cloud-based scheme performs better than inter-vehicle communication approach and cluster-based scheme.

关键词： roadside parking cloud mobile cloud trip history model trajectory prediction content distribution

Substructure hybrid testing of reinforced concrete shear wall structure using a domain overlapping technique

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Earthquake Engineering and Engineering Vibration 2017年第4期16卷 761-772页

作者： Zhang yu Pan Peng gong Runhua Wang Tao xue Weichen Key laborary of Earthquake Engineering and Engineering vibration Institute of Engineering MechanicsChina Earthquake AdministrationYanjiaoSanheHebei 065201P.R.China Key Laboratory of Civil Engineering Safety and Durability of China Education Tsinghua UniversityBeijing 100084P.R.China Department of Civil Engineering Tsinghua UniversityBeijing 100084P.R.China Building Engineering Department Tongji UniversityShanghai 200092P.R.China

An online hybrid test was carried out on a 40-story 120-m high concrete shear wall structure. The structure was divided into two substructures whereby a physical model of the bottom three stories was tested in the laboratory and the upper 37 stories were simulated numerically using ABAQUS. An overlapping domain method was employed for the bottom three stories to ensure the validity of the boundary conditions of the superstructure. Mixed control was adopted in the test. Displacement control was used to apply the horizontal displacement, while two controlled force actuators were applied to simulate the overturning moment, which is very large and cannot be ignored in the substructure hybrid test of high-rise buildings. A series of tests with earthquake sources of sequentially increasing intensities were carried out. The test results indicate that the proposed hybrid test method is a solution to reproduce the seismic response of high-rise concrete shear wall buildings. The seismic performance of the tested precast high-rise building satisfies the requirements of the Chinese seismic design code.

关键词： hybrid test substructure technique domain overlapping method precast concrete building

Microstructure-based finite element modeling of effect of metastable austenite on mechanical properties of quenching and partitioning (Q&P)980 steel

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Journal of Iron and Steel Research International 2018年第11期25卷 1140-1148页

作者： Hui Zheng Wei Li yu gong Li Wang xue-jun Jin Institute of Advanced Steels and Materials School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration Shanghai Jiao Tong University Shanghai 200240China State Key Lab of Development and Application Technology of Automotive Steels Baosteel Research Institute Shanghai 201900China

The microstructure-based finite element modeling was conducted to study the mechanical properties of Q&P 980 steel at the microscopic *** two-dimensional representative volume elements of real microstructure were obtained from electron backscattered diffraction ***-Kocks equation was used to predict the constitutive strain-stress relationships of individual ***-induced martensitic transformation takes place when the driving force exceeds the critical driving force according to a stress-invariant-based *** macroscopic stress-strain curves and the work-hardening rate curves obtained from modeling fit well with the experimental *** simulation results also indicate that the local distributions of stress and strain in constituent phases are dependent on their *** ferrite carries the highest strain,while hard mechanical-induced martensite carries the highest *** comparing the modeling results of the microstructures with and without austenite,it shows that the transformation of retained austenite to hard martensite can increase the .work-hardening ability and hence improve the strength and ductility of the *** detailed finite element modeling methods and results are presented and discussed.

关键词： Q&P steel Retained austenite Mechanical property TRIP effect Finite element modeling