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Rare Metals 2021年第1期40卷 156-167页

作者： Chang-Sheng Wang hua-Dong Fu Jian-xin xie Beijing Advanced Innovation Center for Materials Genome Engineering Institute for Advanced Materials and TechnologyUniversity of Science and Technology BeijingBeijing 100083China Beijing Laboratory of Metallic Materials and Processing for Modern Transportation Institute for Advanced Materials and TechnologyBeijing 100083China

By means of isothermal compression at temperatures in the range of 650-900℃and strain rates in the range of 0.001-1 s^(-1),the dynamic recrystallization behavior and microstructural evolution of a Cu-3.28 Ni-0.6 Si-0.22 Zn-0.11 Cr-0.04 P(wt%)alloy designed by a machine learning method were investigated.A semiempirical constitutive equation,processing maps and an average activation energy were *** microstructure under different conditions and the effect of strain rate on the texture of the alloy at 800-900℃were *** results show that the suitable temperature is800-900℃;when the strain is less than 0.4,the appropriate strain rate is 0.01-0.5 s^(-1);and when the strain is greater than 0.4,the appropriate strain rate is below0.05 s^(-1).After deformation at 800℃,the main texture changed from{112}of copper to a uniform distribution with the increase in strain rate,but the sample did not have obvious texture after deformation at 850 and900℃.The above results can provide a reference for the selection of process parameters.

关键词： High-performance copper alloy Hot compression Dynamic recrystallization Processing map Texture evolution

Effects of Fe content on the microstructure and properties of CuN i10FeM n1 alloy tubes fabricated by HCCM horizontal continuous casting

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International Journal of Minerals,Metallurgy and Materials 2016年第4期23卷 449-457页

作者： Yan-bin Jiang Jun Xu xin-hua Liu Jian-xin xie Key Laboratory for Advanced Materials Processing of the Ministry of Education University of Science and Technology Beijing Beijing Laboratory of Metallic Materials and Processing for Modern Transportation University of Science and Technology Beijing

Heating-cooling combined mold（HCCM） horizontal continuous casting technology developed by our research group was used to produce high axial columnar-grained CuN i10 FeM n1 alloy tubes with different Fe contents. The effects of Fe content（1.08wt%–2.01wt%） on the microstructure, segregation, and flushing corrosion resistance in simulated flowing seawater as well as the mechanical properties of the alloy tubes were investigated. The results show that when the Fe content is increased from 1.08wt% to 2.01wt%, the segregation degree of Ni and Fe elements increases, and the segregation coefficient of Ni and Fe elements falls from 0.92 to 0.70 and from 0.92 to 0.63, respectively. With increasing Fe content, the corrosion rate of the alloy decreases initially and then increases. When the Fe content is 1.83wt%, the corrosion rate approaches the minimum and dense, less-defect corrosion films, which contain rich Ni and Fe elements, form on the surface of the alloy; these films effectively protect the α-matrix and reduce the corrosion rate. When the Fe content is increased from 1.08wt% to 2.01wt%, the tensile strength of the alloy tube increases from 204 MPa to 236 MPa, while the elongation to failure changes slightly about 46%, indicating the excellent workability of the CuNi10FeMn1 alloy tubes.

关键词： copper nickel alloys iron content casting segregation mechanical properties corrosion resistance

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μClinux内存管理分析

兵工自动化 2006年第3期25卷 52-53页

作者：谢新华李端明李树贤西南科技大学计算机科学与技术学院四川绵阳621010

μClinux内存管理采用非标准Linux内存模型。系统为进程分配连续内存区域,代码段、数据段和栈段间无空隙,且进程私有堆被取消,所有进程共享由操作系统管理的堆空间。最简单的malloc利用mmap从核心空闲内存池中分配内存以实现。并采用存... 详细信息

μClinux内存管理采用非标准Linux内存模型。系统为进程分配连续内存区域,代码段、数据段和栈段间无空隙,且进程私有堆被取消,所有进程共享由操作系统管理的堆空间。最简单的malloc利用mmap从核心空闲内存池中分配内存以实现。并采用存储器分页管理,系统启动时把实际存储器分页,加载应用程序时再程序分页加载。

关键词： μClinux 内存管理内存模型 MMU

Effect of continuous induction annealing on the microstructure and mechanical properties of copper-clad aluminum flat bars

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International Journal of Minerals,Metallurgy and Materials 2016年第12期23卷 1427-1436页

作者： xin-hua Liu Yan-bin Jiang Hong-jie Zhang Jian-xin xie Key Laboratory for Advanced Materials Processing of the Ministry of Education University of Science and Technology Beijing Institute of Advanced Materials and Technology University of Science and Technology Beijing

Copper-clad aluminum （CCA） flat bars produced by the continuous casting-rolling process were subjected to continuous induction heating annealing （CIHA）, and the effects of induction heating temperature and holding time on the microstructure, interface, and mechanical properties of the fiat bars were investigated. The results showed that complete recrystallization of the copper sheath occurred under CIHA at 460℃ for 5 s, 480℃ for 3 s, or 500℃ for 1 s and that the average grain size in the copper sheath was approximately 10.0 μm. In the case of specimens subjected to CIHA at 460-500℃ for longer than 1 s, complete recrystallization occurred in the aluminum core. In the case of CIHA at 460-500℃ for 1-5 s, a continuous interracial layer with a thickness of 2.5-5.5 μm formed and the thickness mainly increased with increasing annealing temperature. After CIHA, the interracial layer consisted primarily of a Cu9A14 layer and a CuA12 layer; the average interface shear strength of the CCA flat bars treated by CIHA at 460-500℃ for 1-5 s was 45-52 MPa. After full softening annealing, the hardness values of the copper sheath and the aluminum core were HV 65 and HV 24, respectively, and the hardness along the cross section of the CCA flat bar was uniform.

关键词： metal cladding copper-clad aluminum annealing interfaces mechanical properties

Maintaining moderate levels of hypochlorous acid promotes neural stem cell proliferation and differentiation in the recovery phase of stroke

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Neural Regeneration Research 2025年第3期20卷 845-857页

作者： Lin-Yan huang Yi-De Zhang Jie Chen Hai-Di Fan Wan Wang Bin Wang Ju-Yun Ma Peng-Peng Li Hai-Wei Pu xin-Yian Guo Jian-Gang Shen Su-hua Qi School of Medical Technology Xuzhou Key Laboratory of Laboratory DiagnosticsXuzhou Medical UniversityXuzhouJiangsu ProvinceChina School of Pharmacy Xuzhou Medical UniversityXuzhouJiangsu ProvinceChina Department of Laboratory Medicine Branch Hospital of Huai’an First People’s HospitalHuai’anJiangsu ProvinceChina Department of Laboratory Medicine the Affiliated Hospital of Xuzhou Medical UniversityXuzhouJiangsu ProvinceChina School of Chinese Medicine The University of Hong KongHong Kong Special Administrative RegionChina

It has been shown clinically that continuous removal of ischemia/reperfusion-induced reactive oxygen species is not conducive to the recovery of late ***,previous studies have shown that excessive increases in hypochlorous acid after stroke can cause severe damage to brain *** previous studies have found that a small amount of hypochlorous acid still exists in the later stage of stroke,but its specific role and mechanism are currently *** simulate stroke in vivo,a middle cerebral artery occlusion rat model was established,with an oxygen-glucose deprivation/reoxygenation model established in vitro to mimic *** found that in the early stage(within 24 hours)of ischemic stroke,neutrophils produced a large amount of hypochlorous acid,while in the recovery phase(10 days after stroke),microglia were activated and produced a small amount of hypochlorous ***,in acute stroke in rats,hypochlorous acid production was prevented using a hypochlorous acid scavenger,taurine,or myeloperoxidase inhibitor,4-aminobenzoic acid *** results showed that high levels of hypochlorous acid(200μM)induced neuronal apoptosis after oxygen/glucose deprivation/***,in the recovery phase of the middle cerebral artery occlusion model,a moderate level of hypochlorous acid promoted the proliferation and differentiation of neural stem cells into neurons and *** suggests that hypochlorous acid plays different roles at different phases of cerebral ischemia/reperfusion *** levels of hypochlorous acid(5 and 100μM)promoted nuclear translocation ofβ-*** transfection of single-site mutation plasmids,we found that hypochlorous acid induced chlorination of theβ-catenin tyrosine 30 residue,which promoted nuclear ***,our study indicates that maintaining low levels of hypochlorous acid plays a key role in the recovery of neurological function.

关键词： cell differentiation cerebral ischemia/reperfusion injury chlorination hypochlorous acid microglia neural stem cell neurogenesis nuclear translocation stroke β-catenin

Liquid-solid interface control of BFe10-1-1 cupronickel alloy tubes during HCCM horizontal continuous casting and its effect on the microstructure and properties

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International Journal of Minerals,Metallurgy and Materials 2013年第8期20卷 748-758页

作者： Jun Mei xin-hua Liu Yan-bin Jiang Song Chen Jian-xin xie Key Laboratory for Advanced Materials Processing(MOE) University of Science and Technology Beijing Institute for advanced Materials and Technology University of Science and Technology Beijing

Based on horizontal continuous casting with a heating-cooling combined mold （HCCM） technology, this article investigated the effects of processing parameters on the liquid-solid interface （LSI） position and the influence of LSI position on the surface quality, microstructure, texture, and mechanical properties of a BFe10-1-1 tube （φ50 mm × 5 mm）. HCCM efficiently improves the temperature gradient in front of the LSI. Through controlling the LSI position, the radial columnar-grained microstructure that is commonly generated by cooling mold casting can be eliminated, and the axial columnar-grained microstructure can be obtained. Under the condition of 1250℃ melting and holding temperature, 1200-1250℃ mold heating temperature, 50-80 mm/min mean drawing speed, and 500-700 L/h cooling water flow rate, the LSI position is located at the middle of the transition zone or near the entrance of the cooling section, and the as-cast tube not only has a strong axial columnar-grained microstructure （{hkl}〈621〉, {hkl}〈221〉） due to strong axial heating conduction during solidification but also has smooth internal and external surfaces without cracks, scratches, and other macroscopic defects due to short solidified shell length and short contact length between the tube and the mold at high temperature. The elongation and tensile strength of the tube are 46.0%-47.2% and 210-221 MPa, respectively, which can be directly used for the subsequent cold-large-strain processing.

关键词： copper-nickel alloys tubes continuous casting interfaces textures mechanical properties

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超声波辅助酶法提取红枣多糖的研究

林产化学与工业 2011年第4期31卷 58-62页

作者：孙晓瑞王娜谢新华雷丹张寒瑞常俊晓艾志录河南农业大学食品科学技术学院河南郑州450002

研究了超声波酶法联合提取红枣多糖的工艺条件。通过正交试验优化出最佳超声波提取条件;在最佳超声波提取条件下,以多糖纯度及提取率为指标,从木瓜蛋白酶、胰蛋白酶及中性蛋白酶中筛选出木瓜蛋白酶;对木瓜蛋白酶处理条件进行研究,最后... 详细信息

研究了超声波酶法联合提取红枣多糖的工艺条件。通过正交试验优化出最佳超声波提取条件;在最佳超声波提取条件下,以多糖纯度及提取率为指标,从木瓜蛋白酶、胰蛋白酶及中性蛋白酶中筛选出木瓜蛋白酶;对木瓜蛋白酶处理条件进行研究,最后得出超声波辅助酶法提取红枣多糖的最佳工艺条件为:10 g红枣,料液比1∶8(g∶mL),温度70℃,超声波时间25 min,超声波功率70 W,经超声波处理后,添加0.15%木瓜蛋白酶、pH值6.0、时间120 min、温度60℃。此条件下,提取2次,多糖的得率为21.95%,纯度达到13.05%。

关键词：超声波木瓜蛋白酶红枣多糖

Multiscale observation of Li plating for lithium-ion batteries

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Rare Metals 2021年第11期40卷 3038-3048页

作者： xin-Lei Gao xin-hua Liu Wen-Long xie Li-Sheng Zhang Shi-Chun Yang School of Transportation Science and Engineering Beihang UniversityBeijing 100191China

As the most hazardous side reaction,Li plating poses high risks of undermining electrochemical performance of Li-ion batteries by accelerating *** some extreme abuse conditions,Li plating can even jeopardize safety performance and induce catastrophic results like thermal ***,multiscale observation of Li plating is of great significance for understanding the internal mechanisms and early detection of Li *** this mini-review,the recent progress of formation mechanisms of plated metallic lithium was ***,the in situ and ex situ observation methods of macroscopic,microscopic and atomic level were *** electrode provides a promising tool for real-time monitoring of anode potential,which is the critical factor of Li plating,showing great potentials in cloudbased battery management ***,some perspectives for future researches on Li plating observation and corresponding utilizations in developing Li plating free control strategies were proposed.

关键词： Lithium-ion battery Li plating Multiscale observation Reference electrodes

牛蛙爱德华氏菌病病原菌的鉴定和致病因素的研究

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水产学报 1997年第3期 316-321页

作者：肖克宇黄志坚金燮理舒新华陈可毅江为民湖南农业大学水产系!长沙410128

从患爱德华氏菌病的牛蛙肌肉、肝、肾、血液和腹水中分离到8株细菌，根据其形态和生理生化特性鉴定为野生型迟钝爱德华氏菌。人工感染实验均为该病的病原菌，毒素检测试验表明，致病因素主要是内毒素而不是外毒素。分离菌株的主要特性... 详细信息

从患爱德华氏菌病的牛蛙肌肉、肝、肾、血液和腹水中分离到8株细菌，根据其形态和生理生化特性鉴定为野生型迟钝爱德华氏菌。人工感染实验均为该病的病原菌，毒素检测试验表明，致病因素主要是内毒素而不是外毒素。分离菌株的主要特性为杆状、革兰氏阴性、周生鞭毛、兼性厌氧。接触酶、甲基红试验和硝酸盐还原均为阳性。在三糖铁琼脂上产H2S。氧化酶、丙二酸盐利用、V．P试验、明胶液化、尿素酶。苯丙氨酸脱氨酶为阴性。分解葡萄糖、甘露糖、麦芽糖，产酸产气，不利用甘露醇、蔗糖和阿拉伯糖。

关键词：牛蛙爱德华氏菌病迟钝爱德华氏菌致病性生物学特性

Numerical simulation of temperature field in horizontal core-filling continuous casting for copper cladding aluminum rods

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International Journal of Minerals,Metallurgy and Materials 2013年第7期20卷 684-692页

作者： Ya-jun Su xin-hua Liu Yong-fu Wu Hai-you huang Jian-xin xie Key Laboratory for Advanced Materials Processing (Ministry of Education) Institute of Advanced Materials and Technology Uni- versity of Science and Technology Beijing

The steady-state temperature field of horizontal core-filling continuous casting （HCFC） for producing copper cladding aluminum rods was simulated by finite element method to investigate the effects of key processing parameters on the positions of solid-liquid interfaces （SLIs） of copper and aluminum. It is found that mandrel tube length and mean withdrawing speed have significant effects on the SLI positions of both copper and aluminum. Aluminum casting temperature （TAI）（1003-1123 K） and secondary cooling water flux （600-900 L.h-1） have little effect on the SLI of copper but cause the SLI of aluminum to move 2-4 mm. When TA1 is in a range of 1043-1123 K, the liquid aluminum can fill continuously into the pre-solidified copper tube. Based on the numerical simulation, reasonable processing parameters were determined.

关键词： metal cladding copper aluminum continuous casting interfaces computer simulation