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Effect of Ball Scribing on Magnetic Barkhausen Noise of Grain-oriented Electrical Steel

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Journal of Materials Science & Technology 2013年第7期29卷 673-677页

作者： Hao Wang Changsheng Li Tao Zhu Ban Cai gang huo Nasir Mohamed State Key Laboratory of Rolling and Automation Northeastern University Wolfson Centre for Magnetics Cardiff UniversityCardiff CF24 3AAUK Benxi Steel Posco Cold Strip Rolling Co.Ltd

Effect of ball scribing on magnetic Barkhausen noise （MBN） of conventional grain-oriented （CGO） and high- permeability grain-oriented （HGO） electrical steel was investigated. The results showed that after ball scribing, root mean square of MBN （MBNrms） of CGO electrical steel increased 9.8% with 4 mm scribing spacing at 1.2 T, and that of HGO electrical steel apparently decreased 17.3% with 16 mm scribing spacing at 1.2 T. Through the formation and development of free magnetic poles and secondary magnetic domains due to compressive stress, primary magnetic domain space of grain-oriented electrical steel becomes smaller, which reflects as a variation of MBN in the macroscopic magnetic properties. Through correlation formula derivation of MBNrms and equilibrium distance between domain walls, effect of domain refinement on grain-oriented electrical steel was also interpreted, and optimum equilibrium distance between domain walls was determined.

关键词： Ball scribing Grain-oriented electrical steel Magnetic Barkhausen noise Domain refinement

Efect of Ball Scribing on Relative Permeability of Grain-oriented Electrical Steel

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Acta Metallurgica Sinica(English Letters) 2013年第5期26卷 618-622页

作者： Hao WANG Changsheng LI Tao ZHU Nkwachukwu Chukwuchekwa Ban CAI gang huo State Key Laboratory of Rolling and Automation Northeastern University Wolfson Centre for Magnetics Cardif University Pohang Cold Strip Rolling Co.Ltd of Bensteel

Efect of ball scribing on relative permeability of conventional grain-oriented（CGO） and high permeability grain-oriented（HGO） electrical steel was investigated. The samples were scribed with spacing of 2 mm, 4 mm, 8 mm and 16 mm. The results show that after ball scribing with 16 mm width at 1.0 T, relative permeability of both℃GO and HGO steels was increased by 109% and 80%, respectively. Relative permeability rises as the scribing space increases, with the movement of the peak value of relative permeability to a higher flux density. Relational models describing relative permeability and flux density were constructed with high accuracy based on experimental data. The experimental data curves were analyzed during the magnetizing process.

关键词： Ball scribing Grain-oriented electrical steel Relative permeability Relational modeling

Effects of Heat Treatment Process Parameters on Microstructure and Mechanical Properties of DP440Cold Rolled Strip

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Journal of Iron and Steel Research International 2014年第5期21卷 509-516页

作者： gang huo Yi-ming CEN Zhen-xing LI Guo-dong LI Chang-sheng LI State Key Laboratory of Rolling and Automation Northeastern University Pohang Cold Strip Rolling Co. Ltd.

In order to optimize the production process, improve the production efficiency and accelerate the development and application of the domestic dual-phase steel, the effects of heat treatment process parameters on microstructure and mechanical properties of DP440 cold rolled strip were studied by the CAS-300 simulated continuous annealing equipment. When the heating rate increased from 5 to 100 ℃/s, both the tensile strength and yield strength increased because of the decreased grain size. When the intercritical annealing temperature increased from 780 to 850 ℃, the martensite content decreased so that the tensile strength decreased first, then increased, and the yield strength increased. When the rapid cooling rate increased from 25 to 100 ℃/s, because the martensite content increased, the tensile strength increased, while the yield strength decreased. When the overaging temperature increased from 260 to 400 ℃, the tensile strength decreased, while the yield strength increased. When the overaging time increased from 240 to 480 s, the tensile strength decreased a little, while the yield strength increased a little.

关键词： dual-phase steel heat treatment microstructure mechanical property

Effect of Ball Scribing on Iron Loss of CGO and HGO Electrical Steel

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Journal of Harbin Institute of Technology(New Series) 2013年第3期20卷 81-85页

作者： Hao Wang Chang-Sheng Li gang huo Ban Cai Nasir Mohamed State Key Laboratory of Rolling and Automation Northeastern University Wolfson Centre for Magnetics Cardiff UniversityCardiff CF24 3AAUK Pohang Cold Strip Rolling Co. Ltd of Bensteel

The effect of ball scribing on iron loss of conventional grain-oriented ( CGO) and high-permeability grain-oriented ( HGO) electrical steel was investigated. In this paper,ball scribing was achieved by self- designed ball scribing instrument and a computer-controlled system capable of providing high accuracy and automatic measurements was developed for the magnetisation and measurement at high and low flux densities. The results showed that after ball scribing,iron loss of two types of steel ( C711 and H668 ) apparently decreases ( 5. 5% and 8. 2% respectively after 16mm scribing at 1. 2T) ,and at high and low flux densities, CGO and HGO electrical steel performs differently. Through the formation and development of free magnetic poles and secondary magnetic domains due to compressive stress,primary magnetic domain spacing of grain- oriented electrical steel becomes smaller,which reflects as a reduction of iron loss in the macroscopic magnetic properties. Through iron loss formula derivation,the effect of domain refinement on grain-oriented electrical steel was also interpreted.

关键词： ball scribing electrical steel iron loss domain refinement

Analysis on the influencing factors of radioactive tritium leakage and diffusion from an indoor high‑pressure storage vessel

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Nuclear Science and Techniques 2022年第12期33卷 1-11页

作者： Chang‑Jun Li Xing‑Fu Cai Ming‑Qing Xiao Yong‑gang huo Peng Xu Su‑Fen Li Xiao‑Yan Cao Xi’an Research Institute of High-Tech Xi’an 710025China Air Force Engineering University Xi’an 710051China

Radioactive tritium leakage from high-pressure storage vessels is a common nuclear leakage *** leakage conditions have different effects on tritium diffusion,resulting in different degrees of radioactive *** study focuses on tritium leakage from high-pressure storage vessels and analyzes the influence of different leakage orifice shapes,leakage positions,and the presence of obstacles in the scene space on tritium leakage *** results show that there is little difference in the radial diffusion velocity of tritium gas along the jet axis between circular and square leakage *** radial diffusion velocity of tritium gas in the long-axis direction of the rectangular leakage orifice is larger than that in the short-axis direction,and the larger the aspect ratio of the rectangle is,the greater the difference is in the diffusion *** addition,leakage from the storage vessel below the air inlet is beneficial to the dilution of tritium,whereas leakage from the air vents leads to a slow decrease in the tritium *** obstacles present in the tritium scene space hinder the migration of tritium gas and prolong the time for the tritium concentration to reach *** study provides a theoretical basis for the disposal of tritium in tritium leakage accidents by analyzing the influence of different leakage conditions in storage vessels on tritium gas diffusion.

关键词： Tritium leakage Leakage orifice shape Leakage position Obstacles

PTEN and AKT/GSK-3β/CRMP-2 signaling pathway are involved in neuronal apoptosis and axonal injury in early brain injury after SAH in rats

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Genes & Diseases 2022年第1期9卷 252-267页

作者： Hong Chen Chao Zhou Jianfeng Zheng Zhaosi Zhang Yongbing Deng Chongjie Cheng Zongduo Guo gang huo Cheng Yin Xiaochuan Sun Department of Neurosurgery of the First Affiliated Hospital of Chongqing Medical University Chongqing 400016PR China Department of Neurosurgery of the Chongqing Emergency Medical Center Chongqing 400014PR China Department of Neurosurgery Sichuan Provincial People's HospitalUniversity of Electronic Science and Technology of ChinaChengduSichuan 610072PR China

In early brain injury(EBI)after subarachnoid hemorrhage(SAH),white matter(WM)axonal injury plays a key role in the prognosis of the *** purpose of this study was to investigate the effects of phosphatase and tensin homolog deleted on chromosome ten(PTEN)on axonal injury and neuronal apoptosis post-SAH in rats and to find its underlying ***-associated virus was injected into the lateral ventricle to suppress or promote *** function post-SAH in animals was determined by the modified Garcia score,beam balance,and Rotarod test,and the blood–brain barrier disruption was assessed by the brain water *** injury post-SAH was observed by TEM and determined by IF,and neuron apoptosis was measured by TUNEL *** mechanism was analyzed by Western blot to detect p-PTEN/PTEN,p-AKT/AKT,p-GSK-3β/GSK-3β,p-CRMP-2/CRMP-2,axonal injury markerβ-APP and pro-and anti-apoptosis proteins,including Bax and Bcl-2,*** found *** knocking down PTEN,neuronal apoptosis and axonal injury were alleviated,and nerve function and blood–brain barrier were protected;accordingly,after overexpression of PTEN,neuronal apoptosis and axon damage were aggravated,and nerve function damage and blood–brain barrier damage were *** and AKT/GSK-3β/CRMP-2 pathway were jointly involved in regulating neuronal apoptosis and WM axon injury after *** to our research,PTEN was a negative factor of EBI,and together with the AKT/GSK-3β/CRMP-2 signaling pathway aggravates neuronal apoptosis and WM axon damage after *** of PTEN expression may become a new target for SAH treatment.

关键词： AKT/GSK-3β/CRMP-2 pathway Axonal injury Early brain injury Neuronal apoptosis PTEN Subarachnoid hemorrhage

Expression of second mitochondria-derived activator of caspases, X-linked inhibitor of apoptosis protein, and caspase-3 in pituitary adenomas

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Neural Regeneration Research 2011年第7期6卷 546-552页

作者： Dong Li gang huo Liang Wang Qinglin Feng Maoyuan Tang Department of Neurosurgery First Affiliated Hospital Chongqing Medical University Chongqing 400016 China

Studies concerning correlations between pituitary adenomas and cell apoptosis have mainly focused on upstream apoptosis signaling, but seldom on downstream mediators. In the present study, second mitochondria-derived activator of caspases （Smac）, X-linked inhibitor of apoptosis protein （XIAP）, and caspase-3 protein were qualitatively analyzed using immunohistochemistry, and quantified by western blot. Smac, XIAP, and caspase-3 mRNA expressions were detected by reverse transcription-PCR. Results showed that XIAP protein and mRNA expressions were greater in the invasive pituitary adenoma group compared with the noninvasive pituitary adenoma group. However, Smac and caspase-3 protein and mRNA expressions were lower in the invasive pituitary adenoma group compared with the noninvasive pituitary adenoma group. In the invasive pituitary adenomas, Smac expression was positively correlated with caspase-3 protein and mRNA expression （Protein： r = 0.55, P 0.01; mRNA： r = 0.50, P 0.01）. Smac and caspase-3 expressions were negatively correlated with XIAP protein and mRNA expression （Protein： r = -0.56, -0.64, P 0.01; mRNA： r = -0.69, -0.67, P 0.01）. However, no significant differences in correlation among Smac, XIAP, and caspase-3 were detectable in noninvasive pituitary adenomas. These data indicated that high expression of XIAP and low expression of Smac and caspase-3 suppressed cell apoptosis and led to enhanced invasiveness of pituitary adenomas. Thus, Smac, XIAP, and caspase-3 may be useful markers in determining the invasive behavior of pituitary adenomas.

关键词： second mitochondria-derived activator of caspases X-linked inhibitor of apoptosis protein caspase-3 pituitary adenoma neural regeneration invasiveness

Establishment and Application of A Human Primary Keratinocyte Inflammation Model for Cosmetic Raw Material Screening

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China Detergent & Cosmetics 2023年第3期8卷 58-62页

作者： Sun Fanghui Song Xiaojie huo gang R&D Center Osmun Biological Co.Ltd.China

Using inducers to induce cells to produce inflammatory response is a common in vitro experimental method to study ***,there are relatively few inflammatory models developed for the cosmetic industry,and there are also great differences in the control of model induction,the selection of inflammatory indicators,and the concentration of ***,in this paper,by systematically studying the effects of Lipopolysaccharide(LPS)on the cell viability,the levels of IL-1α,IL-8 and ROS of human primary keratinocytes,a skin inflammation model based human primary keratinocyte was *** results showed that 0.01~100μg/mL LPS had no significant effect on the cell viability of human primary keratinocytes,while 100μg/mL LPS could simultaneously induce human primary keratinocytes to produce large amounts of IL-1αand IL-8,and 0.01μg/mL LPS could induce plentiful ***,a skin inflammation model for differential induction of different inflammatory indicators was established,and the sample OSM2021041301 was tested with this model,it was found that sample OSM2021041301 could significantly inhibit LPS-induced elevated IL-1αand IL-8 levels,the inhibitory effect on LPS-induced elevated ROS level was *** results indicated that OSM2021041301 has certain anti-inflammatory effect on inflammation caused by the increase of IL-1α,IL-8 and ROS induced by LPS and its analogues.

关键词： LPS human primary keratinocytes inflammation model IL-1α IL-8 ROS

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热固性聚苯醚树脂在高频印制电路板上的应用

中国塑料 2000年第5期14卷 14-22页

作者：霍刚北京市化工研究院北京100084

介绍了高频印制电路板基材的介电性能要求和热固性聚苯醚树脂基材的制备 ,详细讨论了制备热固性聚苯醚树脂的两条技术路线及其树脂体系的特性 ,以及热固性聚苯醚树脂基覆铜板的特性 ,并简要介绍了热固性聚苯醚树脂基覆铜板的应用情况。

关键词：热固性聚苯醚介电性高频印制电路板覆铜板