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Acta Metallurgica Sinica(English Letters) 1990年第5期3卷 327-331页

作者： li shuchen southwestern jiaotong university,chengdu,chinachen mengzhe ke jun university of science and technology beijing,beijing,china

On the basis of statistical data of MnS in the conventional 3% Si steel sheeets after various annealing processes,the critical inclusion factor has been evaluated to be 20 mm^(-1).The inhi- bition of MnS to grain grow... 详细信息

关键词： 3%Si steel secondary recrystallization inclusion factor

Continuous Separation of Inclusions from Aluminum Melt Flowing in a Circular Pipe using a High Frequency Magnetic Field

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Journal of Materials science & technology 2003年第3期19卷 221-225页

作者： Da SHU, Baode SUN, ke li, jun WANG Yaohe ZHOUState key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong university, Shanghai 200030, china Lab. of Metal Matrix Composites Shanghai Jiaotong Univ. Shanghai 200030 China

The continuous separation of inclusions from aluminum melt flowing in a circular pipe using a high frequency magnetic field was investigated both theoretically and experimentally. The separation efficiency was calculated based on the trajectory method and compared with experimental results. It is found that the separation efficiency is a function ofnondimensional parameters ti . The effective way to improve the separation efficiency is to increase the effective magnetic flux density and decrease the pipe radius, and the value of should be kept about 2 in order to obtain the optimum separation efficiency.

关键词： Aluminum Inclusions Magnetic field Separation efficiency

A New Ceramic Substrate Glaze with High Resistance to Molten Aluminum

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Journal of Materials science & technology 2003年第5期19卷 505-506页

作者： Ming ZHOU, ke li, Da SHU, Jiao ZHANG, Baode SUN and jun WANGState key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong university, Shanghai 200030, china State key Laboratory of Metal Matrix Composites Shanghai Jiaotong University Shanghai 200030 China

Corrosion resistance of ceramic substrate glazes to molten aluminum was studied in this paper. The glazes can spread slightly in aluminum alloy according to SEM examination of solidified interface between the glazes and aluminum alloy. The components of B2O3-P2O5 glazes were not detected with electron probe at the side of aluminum alloy near the interface, but the components of boron-free glaze were detected. It is shown that borophosphate glazes can resist the corrosion of molten aluminum.

关键词： Glaze Molten aluminum Anticorrosion Interface

The In-Flight Realtime Trigger and Localization Software of GECAM

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Research in Astronomy and Astrophysics 2024年第10期24卷 11-24页

作者： Xiao-Yun Zhao Shao-lin Xiong Xiang-Yang Wen Xin-Qiao li Ce Cai Shuo Xiao Qi Luo Wen-Xi Peng Dong-Ya Guo Zheng-Hua An ke Gong Jin-Yuan liao Yan-Qiu Zhang Yue Huang Lu li Xing Wen Fei Zhang Jing Duan Chen-Wei Wang Dong-li Shi Peng Zhang Qi-Bin Yi Chao-Yang li Yan-Bing Xu Xiao-Hua liang Ya-Qing liu Da-li Zhang Xi-Lei Sun Fan Zhang Gang Chen Huan-Yu Wang Sheng Yang Xiao-Jing liu Min Gao Mao-Shun li Jin-Zhou Wang Xing Zhou Yi Zhao Wang-Chen Xue Chao Zheng Jia-Cong liu Xing-Bo Han Jin-ling Qi Jia Huang ke-ke Zhang Can Chen Xiong-Tao Yang Dong-Jie Hou Yu-Sa Wang Rui Qiao Xiang Ma Xiao-Bo li Ping Wang Xin-Ying Song li-Ming Song Shi-Jie Zheng Bing li Hong-Mei Zhang Yue Zhu Wei Chen Jian-Jian He Zhen Zhang Jin Hou Hong-jun Wang Yan-Chao Hao Xiang-Yu Wang Zong-Yuan Yang Zhi-Long Wen Zhi Chang Yuan-Yuan Du Rui Gao Xiao-Fei Lan Yan-Guo li Gang li Xu-Fang li Fang-jun Lu Hong Lu Bin Meng Feng Shi Hui Wang Hui-Zhen Wang Yu-Peng Xu Jia-Wei Yang Xue-Juan Yang Shuang-Nan Zhang Chao-Yue Zhang Cheng-Mo Zhang Zhi-Cheng Tang Cheng Cheng key Laboratory of Particle Astrophysics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China university of Chinese Academy of sciences Chinese Academy of SciencesBeijing 100049China School of Information science and technology Southwest Jiaotong UniversityChengdu 611756China key Laboratory of Stellar and Interstellar Physics and Department of Physics Xiangtan UniversityXiangtan 411105China Physics and Space science College China West Normal UniversityNanchong 637002China Department of Astronomy Beijing Normal UniversityBeijing 100875China Innovation Academy for Microsatellites of CAS Shanghai 201203China Changchun university of science and technology Changchun 130022China Chinese Academy of sciences South America Center for Astronomy National Astronomical ObservatoriesCASBeijing 100101China

Realtime trigger and localization of bursts are the key functions of GECAM,an all-sky gamma-ray monitor launched on 2020 December *** developed a multifunctional trigger and localization software operating in the CPU of the GECAM Electronic *** onboard software has the following features:high trigger efficiency for real celestial bursts with a suppression of false triggers caused by charged particle bursts and background fluctuation,dedicated localization algorithm optimized for both short and long bursts,and low time latency of the trigger information which is downlinked through the Global Short Message Communication service of the global BeiDou navigation *** paper provides a detailed description of the design and development of the trigger and localization software system for *** covers the general design,workflow,the main functions,and the algorithms used in the *** paper also includes on-ground trigger tests using simulated gamma-ray bursts generated by a dedicated X-ray tube,as well as an overview of the performance for real celestial bursts during its in-orbit operation.

关键词： telescopes instrumentation:detectors methods:observational

川南城市群冬季大气细颗粒物中金属元素特征及其来源解析

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环境科学 2024年第6期45卷 3756-3764页

作者：张天力黄小娟张军科韩琳陈璐瑶张小玲成都信息工程大学大气科学学院成都610225 成都信息工程大学大气科学学院成都平原城市气象与环境四川省野外科学观测研究站成都610225 西南交通大学地球科学与环境工程学院成都611756

为探究川南城市群(自贡、泸州、内江和宜宾)冬季大气重污染过程中PM_(2.5)中金属元素的浓度特征和来源,在2018年12月30日至2019年1月14日,使用膜采样方法对PM_(2.5)中的金属元素进行测定,并运用富集因子法(EF)和正定矩阵因子分解法(PMF... 详细信息

为探究川南城市群(自贡、泸州、内江和宜宾)冬季大气重污染过程中PM_(2.5)中金属元素的浓度特征和来源,在2018年12月30日至2019年1月14日,使用膜采样方法对PM_(2.5)中的金属元素进行测定,并运用富集因子法(EF)和正定矩阵因子分解法(PMF)对金属元素来源进行解析.同时采用自贡市在2015年同期金属元素观测数据,探究自贡市在“大气十条”实施中期与实施结束后的金属元素污染与富集程度变化情况.结果表明:①不同城市细颗粒物中各金属元素浓度与占比差异不大,4个城市中浓度与占比较高的元素呈现相似性,Al、Sb和Fe元素占比位于前列.从自贡市不同观测期对比来看,除Tl外各元素浓度均有变化.②富集因子计算结果表明,城市群中Cr(自贡与宜宾)、Ni、Cu、As、Se、Ag、Cd、Sb、Tl和Pb元素的富集程度较高.自贡市不同观测期的元素富集程度对比显示,除Cu元素外,2018年冬季观测期各元素富集程度均有减小趋势.③PMF源解析结果表明,各城市中金属元素主要来源为扬尘源、燃煤源、工业源与交通源,同时各污染源之间存在混合贡献.各城市主要污染源贡献不同,自贡以交通扬尘源与混合源为主;泸州以工业源为主;内江市各污染源贡献占比相近;而宜宾市则以交通源为主导.

关键词： PM_(2.5) 金属元素川南城市群正定矩阵因子分解法(PMF) 源解析

Mechanical Properties and Fracture Behavior of Cu-Co-Be Alloy after Plastic Deformation and Heat Treatment

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Journal of Iron and Steel Research International 2016年第9期23卷 933-939页

作者： Yan-jun ZHOU ke-xing SONG Jian-dong XING Zhou li Xiu-hua GUO State key Laboratory for Mechanical Behavior of Materials School of Materials Science and EngineeringXi'an Jiaotong University School of Materials science and Engineering Henan University of Science and Technology Collaborative Innovation Center of Nonferrous Metals Henan University of Science and Technology School of Materials science and Engineering Central South University

Mechanical properties and fracture behavior of Cu-0.84Co 0.23Be alloy after plastic deformation and heat treatment were comparatively investigated. Severe plastic deformation by hot extrusion and cold drawing was adopted to induce large plastic strain of Cu 0.84Co-0.23Be alloy. The tensile strength and elongation are up to 476.6 MPa and 18%, respectively. The fractured surface consists of deep dimples and micro voids. Due to the formation of su- persaturated solid solution on the Cu matrix by solution treatment at 950℃ for 1 h, the tensile strength decreased to 271.9 MPa, while the elongation increased to 42%. The fracture morphology is parabolic dimple. Furthermore, the tensile strength increased significantly to 580.2 MPa after aging at 480 ℃ for 4 h. During the aging process, a large number of precipitates formed and distributed on the Cu matrix. The fracture feature of aged specimens with low elongation （4.6%） exhibits an obvious brittle intergranular fracture. It is confirmed that the mechanical properties and fracture behavior are dominated by the microstrueture characteristics of Cu-0.84Co 0.23Be alloy after plastic de- formation and heat treatment. In addition, the fracture behavior at 450 ℃ of aged Cu-0.84Co 0.23Be alloy was also studied. The tensile strength and elongation are 383.6 MPa and 11.2%, respectively. The fractured morphologies are mainly candy-shaped with partial parabolic dimples and equiaxed dimples. The fracture mode is multi mixed mechanism that brittle intergranular fracture plays a dominant role and ductile fracture is secondary.

关键词： Cu-Co-Be alloy heat treatment mechanical property fracture behavior plastic deformation

A Review on Binderless Tungsten Carbide: Development and Application

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Nano-Micro Letters 2020年第1期12卷 158-194页

作者： Jialin Sun jun Zhao Zhifu Huang ke Yan Xuehui Shen Jiandong Xing Yimin Gao Yongxin Jian Hejie Yang Bo li State key Laboratory for Mechanical Behavior of Materials School of Materials Science and EngineeringXi’an Jiaotong UniversityXi’an 710049People’s Republic of China key Laboratory of High Efficiency and Clean Mechanical Manufacture of MOE School of Mechanical EngineeringShandong UniversityJinan 250061People’s Republic of China key Laboratory of Education Ministry for Modern Design and Rotor‑Bearing System Xi’an Jiaotong UniversityXi’an 710049People’s Republic of China School of Mechanical and Automotive Engineering Qilu University of TechnologyJinan 250353People’s Republic of China

WC-Co alloys have enjoyed great practical significance owing to their excellent properties during the past *** the advantages,however,recently there have been concerns about the challenges associated with the use of Co,*** instability,toxicity and properties degeneration,which necessitates the fabrication of binderless tungsten carbide(BTC).On the other hand,BTC or BTC composites,none of them,to date has been commercialized and produced on an industrial scale,but only used to a limited extent for specialized applications,such as mechanical seals undergoing high burthen as well as high temperature electrical *** are two challenges in developing BTC:fully densifying the sintered body together with achieving a high ***,this review applies towards comprehensively summarize the current knowledge of sintering behavior,microstructure,and mechanical properties of BTC,highlighting the densification improving strategies as well as toughening methods,so as to provide reference for those who would like to enhance the performance of BTC with better reliability advancing them to further wide applications and prepare the material in a way that is environment friendly,harmless to human health and low in production *** paper shows that the fabrication of highly dense and high-performance BTC is economically and technically *** properties of BTC can be tailored by judiciously selecting the chemical composition coupled with taking into careful account the effects of processing techniques and parameters.

关键词： Binderless tungsten carbide Sintering Densification Toughening Mechanical properties

The Hippo pathway and its correlation with acute kidney injury

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Zoological Research 2022年第5期43卷 897-910页

作者： Chi Zhang Chuan-Lei li ke-Xin Xu Zhi-Huang Zheng Guo-Zhe Cheng Hui-Juan Wu jun liu Department of Nephrology Shanghai General HospitalShanghai Jiaotong University School of MedicineShanghai 201600China Department of Pathology School of Basic Medical ScienceFudan UniversityShanghai 200030China

Acute kidney injury(AKI) is a significant clinical complication with a substantial impact on morbidity and mortality, for which therapeutic options remain limited. The Hippo signaling pathway is an evolutionarily conserved pathway implicated in cell proliferation, dedifferentiation, and apoptosis via phosphorylation and inactivation of its downstream effectorsYes-associatedprotein(YAP)/transcriptional co-activator with PDZ-binding motif(TAZ). Recent studies have revealed that the Hippo pathway plays a pivotal role in the pathogenesis and repair of AKI. The Hippo pathway can mediate renal dysfunction through modulation of mitochondrial apoptosis under AKI conditions. Transient activation of YAP/TAZ in the acute phase of AKI may benefit renal recovery and regeneration, whereas persistent activation of YAP/TAZ in severe AKI may lead to maladaptive repair and transition to chronic kidney disease. This review aims to summarize recent findings on the associations between the Hippo pathway and AKI and to identify new therapeutic targets and strategies for AKI.

关键词： Hippo pathway Acute kidney injury(AKI) Maladaptive repair Fibrosis Chronic kidney disease(CKD)

Response to the Lomagundi-Jatuli Event in the southwestern margin of the Yangtze Plate:Evidence from the carbon and oxygen isotopes of the Paleoproterozoic Yongjingshao Formation

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china Geology 2023年第1期6卷 50-60页

作者： jun-ping liu Wei Yin Shi-pan Yang Jiang-tai Zhao Wen-tao Zeng Feng Tang Shi-jun He Wei-ke li School of Earth sciences and Resources China University of GeosciencesBeijing 100083China Yunnan Institute of Geological Survey Kunming 650216China key Laboratory of Sanjiang Metallogeny and Resources Exploration and Utilization MNRKunming 650051China Institute of Geology Chinese Academy of Geological SciencesBeijing 100037China The Second Geological Institute of china Metallurgical Geology Bureau Fuzhou 350108China

The Lomagundi-Jatuli Event(LJE)refers to the significant positive carbon isotope excursion in seawater constituents that occurred immediately after the increase in atmospheric oxygen content during the Paleoproterozoic(2.22-2.06 Ga).Theδ^(13)C values of 46 dolostone samples collected from the Paleoproterozoic Yongjingshao Formation varied in the range of 0.05‰-4.95‰(V-PDB;maximum:4.95‰)in this study,which may be related to the multicellular eukaryotes in the liangshan Formation in the Yimen *** are much higher than theδ^(13)C values of marine carbonates(-1.16‰on average).Theδ^(13)C values of other formations in the Paleoproterozoic Yimen Group are *** notable positive carbon isotope anomalies of the Yongjingshao Formation indicate the response to the LJE at the southwestern margin of the Yangtze Block,which is reported for the first ***,they are comparable to theδ^(13)C values of carbonates in the Dashiling Formation of the Hutuo Group in the Wutaishan area in the North china Craton,the Wuzhiling Formation of the Songshan Group in the Xiong'er area,Henan Province,and the Dashiqiao Formation of the liaohe Group in the Guanmenshan area,liaoning ***,it can be further concluded that the LJE is a global *** study reveals that LJE occurred in Central Yunnan at 2.15-2.10 Ga,lasting for about 50 *** macro-columnar,bean-shaped,and microfilament fossils and reticular ultramicrofossils of multicellular eukaryotes in this period were discovered in the liangshan Formation of the Yimen *** are the direct cause for the LJE and are also the oldest paleontological fossils ever *** major events successively occurring in the early stage of the Earth include the Great Oxygenation Event(first occurrence),the global Superiortype banded iron formations(BIFs),the Huronian glaciation,the Great Oxygenation Event(second occurrence),the explosion of multicellular eukaryotes,the positive carbon isotope excursion,and the global a

关键词： Lomagundi-Jatuli Event Eucaryon Paleoproterozoic Bean-shaped fossil Micro-filament fossil Micro-columnar fossil Carbon and oxygen isotopes Yangtze Plate Geological survey engineering china

Insight into the Excellent Tribological Performance of Highly Oriented Poly(phenylene sulfide)

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Chinese Journal of Polymer science 2022年第3期40卷 290-298,I0007页

作者： liang-Qing Zhang Shu-Gui Yang Jing-Han Zhang ke-Peng Zhong Zhong-Guo Zhao Yan-Hui Chen jun Lei Qiu-Yu Zhang Zhong-Ming li College of Material science and Engineering Xi’an University of Science and TechnologyXi’an 710054China State key Laboratory for Mechanical Behaviour of Materials Shaanxi International Research Center for Soft MaterialsXi’an Jiaotong UniversityXi’an 710049China School of Chemistry and Chemical Engineering Shaanxi Key Laboratory of Macromolecular Science and TechnologyKey Laboratory of Special Functional and Smart Polymer Materials of Ministry of Industry and Information TechnologyNorthwestern Polytechnical UniversityXi’an 710072China National and Local Engineering Laboratory for Slag Comprehensive Utilization and Environment technology School of Materials Science and EngineeringShaanxi University of TechnologyHanzhong 723000China College of Polymer science and Engineering State Key Laboratory of Polymer Materials EngineeringSichuan UniversityChengdu 610065China

Achieving low friction and wear of poly(phenylene sulfide)(PPS) without using fillers or blending is a challenging task, but one of considerable practical importance. Here we describe how neat PPS with high tribological performance is achieved by manipulating processing parameters(pressure, flow and temperature). The key to achieving high tribological performance is comparatively high molecular chain orientation, realized in neat PPS, at high shear rates and low pressure. The friction coefficient and wear rate are as low as ~0.3 and~10^(-6) mm^(3)·N^(-1)·m^(-1), respectively, which break the record for neat PPS. These values are even better than those for PPS-based blends and comparable to PPS composites. Further studies show, for the first time, that wear rate decreases exponentially with increasing molecular chain orientation, prompting us to revise the classical Archard's law by including the effect of molecular chain orientation. These findings open the possibility of using neat PPS in highly demanding tribological applications.

关键词： Poly(phenylene sulfide) Orientation Wear rate Frication coefficient Processing parameters