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Progress in Natural Science:Materials International 2024年第3期34卷 470-481页

作者： Xiang Liu Chaojie Zhang Shaowei Hu Liqiang Zhang haichuan wang School of Metallurgical Engineering Anhui University of Technology

Macrosegregation and shrinkage porosity in large steel ingots are key factors restricting the homogenization of large cast and forged parts. Due to the complex mechanisms of their formation, they have always been challenging issues in the research on solidification control of large steel ingots. The purpose of this review is to systematically revisit the research progress on the mechanisms of macrosegregation and shrinkage porosity formation in large steel ingots, focusing on the mechanisms of formation of 'A' type segregation, positive segregation at the top, and negative segregation at the bottom, and their impact on the quality of steel ingots. At the same time, the conditions and influencing factors for the formation of shrinkage porosity are analyzed in detail, and the interaction between macrosegregation and shrinkage porosity during the solidification process of steel ingots is discussed.Based on existing research results and challenges, prospects for future research directions are proposed,emphasizing the development of high-precision numerical simulation techniques and experimental research methods to deeply understand the internal mechanisms of segregation and porosity formation, providing a scientific basis for formulating effective control strategies.

关键词： Large steel ingot Macrosegregation Mathematical model Shrinkage porosity Solidification process

Intelligent proportioning model of converter scrap based on optimization algorithm

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Progress in Natural Science:Materials International 2024年第1期34卷 37-44页

作者： Chaojie Zhang Jinjun Cheng Liqiang Zhang Yingxue wang Wei Zhang Jianwei Yuan haichuan wang School of Metallurgical Engineering Anhui University of Technology National Engineering Research Center for Public Safety Risk Perception and Control by Big Data(RPP) China Academic of Electronics and Information Technology Wuhu Xinxing Pipes Co. Ltd.

Scrap is one of the main raw materials in converter steelmaking. Due to the wide variety of scrap and the significant differences in its prices, the proportioning of scrap presents a challenge in converter steelmaking. This paper explores the optimal proportioning method of scrap for converters using an optimization mathematical model. Initially, the melting characteristics of scrap after being added to the converter's molten iron were investigated using finite element numerical simulations. The study found that when the weight of the scrap is fixed, both the shape and type of the scrap significantly influence the melting time. Subsequently, employing mathematical optimization methods and considering comprehensive process parameters of the 210t converter smelting, including the composition and unit price of the scrap, as well as the requirements of the converter steelmaking process for scrap, an optimization model for the proportioning of scrap in converters was established.The model was solved using computer programming languages. Through this optimization model, it is possible to obtain the lowest cost per ton of molten steel in the converter smelting process by determining the optimal proportions of various types of scrap.

关键词： scrap proportioning Optimization model Converter steelmaking mathematical model numerical simulation

Enhanced stability and electrochemical properties of lanthanum and cerium co-modified LiVOPO_(4) cathode materials for Li-ion batteries

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Journal of Rare Earths 2023年第10期41卷 1590-1596,I0005页

作者： Zishan Ahsan Zhenfei Cai Shuai wang haichuan wang Yangzhou Ma Guangsheng Song Shihong Zhang Weidong Yang Muhammad Imran Cuie Wen Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials Ministry of EducationSchool of Materials Science and EngineeringAnhui University of TechnologyMaanshan243000China School of Metallurgical Engineering Anhui University of TechnologyMaanshan243002China Future Manufacturing Flagship Commonwealth Scientific and Industry Research OrganizationMelbourneVictoria3168Australia Department of Chemistry Faculty of ScienceKing Khalid UniversityAbha61413Saudi Arabia School of Engineering RMIT UniversityBundooraVictoria3083Australia

A facile and efficient ball-milling assisted sol-gel synthesis route was developed to prepare triclinic e-LiVOPO_(4)(LVOP)material with lanthanum(La)and cerium(Ce)modification individually as well as simultaneously.An LVOP/LaPO_(4)/CePO_(4)composite cathode material was successfully synthesized and results show that La and Ce co-modification noticeably improves the electrochemical performance by enhancing the high voltage capacity upon cycling,which indicates contributions from the good ionic conductors LaPO_(4)and CePO_(4).The simultaneous La and Ce modification improves the high voltage performance significantly with an increase of 50%in high voltage capacity after 20 cycles compared to pure LVOP.It also shows stabilized cycling perfo rmance with 91%capacity rete ntion after 50 cycles at 0.1 C rate,along with high-rate capability with a capacity of 83.1 mAh/g compared to the pristine sample showing the capacity of 51.6 mAh/g at a high rate of 5C.This can be attributed to the good conductivity of LaPO_(4)and CePO_(4).In addition,the LVOP/LaPO_(4)/CePO_(4)composite and the pristine LVOP give a charge transfer resistance of-105 and-212Ω,respectively,showing much lower impedance due to a combination of La and Ce addition.

关键词： Li-ion bateries ε-LiVOP04 Cathode materials La Ce co-modification Enhanced stability Rare earths

MDIG-mediated H3K9me3 demethylation upregulates Myc by activating OTX2 and facilitates liver regeneration

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Signal Transduction and Targeted Therapy 2023年第10期8卷 4927-4941页

作者： Jinpeng Du Wenwei Liao haichuan wang Guimin Hou Min Liao Lin Xu Jiwei Huang Kefei Yuan Xiangzheng Chen Yong Zeng Division of Liver Surgery Department of General Surgery and Laboratory of Liver Surgeryand State Key Laboratory of Biotherapy and Collaborative Innovation Center of BiotherapyWest China HospitalSichuan UniversityChengduSichuan 610041China Department of Hepatobiliary and Pancreatic Surgery The First Affliated Hospital of Zhengzhou UniversityZhengzhouHenan 450052China Department of Thoracic Surgery The Second Clinical Medical CollegeJinan University(Shenzhen People's Hospital)Shenzhen 518020China The First Affliated Hospital Jinan UniversityGuangzhouGuangdong 510630China Department of Hepato-Biliary-Pancreatic Surgery Sichuan Cancer Hospital&InstituteSichuan Cancer CenterThe Affliated Cancer Hospital of University of Electronic Science and Technology of ChinaChengduSichuan 610041China Department of Medical Ultrasound West China HospitalSichuan UniversityChengduSichuan 610041China

The mineral dust-induced gene(MDIG)comprises a conserved JmjC domain and has the ability to demethylate histone H3 lysine 9 trimethylation(H3K9me3),Previous studies have indicated the significance of MDIG in promoting cell proliferation by modulating cell-cycle transition.However,its involvement in liver regeneration has not been extensively investigated.In this study,we generated mice with liver-specific knockout of MDIG and applied partial hepatectomy or carbon tetrachloride mouse models to investigate the biological contribution of MDIG in liver regeneration.

关键词： transition involvement liver

A Data Treatment Method of Carbon Saturated Solubility in Fe-C-Cr Melt

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Journal of University of Science and Technology Beijing 2002年第1期9卷 16-19页

作者： haichuan wang Shijun wang Yuanchi Dong Wenchao Li School of Metallurgical&Materials Anhui University of TechnologyMa’anshan 243002China Metallurgy School University of Science and Technology BeijingBeijing 100083China

Based on the current situation of studying the thermodynamic property of Fe-C-Cr melt using the carbon saturated solubility, an experimental data treatment method of the carbon saturated solubility was put forward. With this method a linear relationship expression of the carbon saturated solubility in Fe-C-Cr melt was obtained, which intercept is dependent on temperature and independent of third component [Cr], but which slope is dependent on third component [Cr] and independent of temperature. Through this expression activity interaction coefficients at different temperatures were calculated and the relationship between activity interaction coefficients and temperature is also obtained.

关键词： data treatment method intercept slope carbon-saturated solubility Fe-C-Cr melt

基于改进Tracktor的行人多目标跟踪算法

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计算机工程与应用 2024年第8期60卷 242-249页

作者：谌海云黄忠义王海川余鸿皓西南石油大学电气信息学院成都610500

在多目标视频跟踪中,针对受交互遮挡等影响导致检测偏差从而致使目标身份丢失的问题,提出一种基于改进Tracktor的行人多目标跟踪算法DUTracktor。在检测框回归中设计一个动态更新模块,利用孪生网络对建议框进一步检测定位;利用时序信息... 详细信息

在多目标视频跟踪中,针对受交互遮挡等影响导致检测偏差从而致使目标身份丢失的问题,提出一种基于改进Tracktor的行人多目标跟踪算法DUTracktor。在检测框回归中设计一个动态更新模块,利用孪生网络对建议框进一步检测定位;利用时序信息增强模块更新当前帧更适合的模板,建立全局上下文关系;并通过像素相关进行特征融合,从而增强目标边缘信息和尺度信息;利用相机运动补偿和融合相似矩阵构建二级关联跟踪机制,建立检测框和轨迹更强大的关联性,提高目标跟踪的鲁棒性。在公开的MOT16数据集上进行实验测试,并与当前主流算法相比,该算法跟踪精度表现较优,具有良好的鲁棒性,FPS稳定在24帧。

关键词：计算机视觉多目标跟踪 Tracktor 孪生网络

引入轻量级Transformer的无人机视觉跟踪

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计算机工程与应用 2024年第2期60卷 244-253页

作者：谌海云王海川黄忠义余鸿皓西南石油大学电气信息学院成都610500

随着无人机在军事和民用领域的广泛运用,对于高精度、低功耗智能无人机跟踪系统的需求日益增加。针对目标跟踪算法在无人机跟踪场景下很难平衡跟踪精度和跟踪速度的问题,提出一种引入轻量级Transformer的孪生网络无人机目标跟踪算法Sia... 详细信息

随着无人机在军事和民用领域的广泛运用,对于高精度、低功耗智能无人机跟踪系统的需求日益增加。针对目标跟踪算法在无人机跟踪场景下很难平衡跟踪精度和跟踪速度的问题,提出一种引入轻量级Transformer的孪生网络无人机目标跟踪算法SiamLT。使用Transformer对AlexNet网络进行改进,在增加最小计算量的情况下捕获全局特征信息。在目标模板与搜索区域匹配方面,联合Transformer和深度互相关运算提出一种二元相关模块,同时捕获目标模板与搜索区域之间的局部相关性和全局依赖关系。在分类回归网络中引入距离交并比,并采用多监督策略训练网络,以获取更准确的目标位置。在UAV123和UAV20L跟踪基准上的实验结果表明,SiamLT算法优于主流的目标跟踪算法,更有效地平衡了跟踪精度和跟踪速度。

关键词：无人机目标跟踪 Transformer 孪生网络多头注意力

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基于不同气候环境的小麦生长适应性分析

山西水土保持科技 2024年第1期 31-37,46页

作者：王海川临汾市水文水资源勘测站山西临汾041000

小麦作为我国主要的农作物品种之一,气候环境的改变将对小麦生长造成影响。本文采用开顶式气室(Open Top Chamber,OTC)对小麦不同种植环境进行模拟,设置常温-灌溉-常CO_(2)(环境1)、常温-干旱-常CO_(2)(环境2)、高温-灌溉-高CO_(2)(环... 详细信息

小麦作为我国主要的农作物品种之一,气候环境的改变将对小麦生长造成影响。本文采用开顶式气室(Open Top Chamber,OTC)对小麦不同种植环境进行模拟,设置常温-灌溉-常CO_(2)(环境1)、常温-干旱-常CO_(2)(环境2)、高温-灌溉-高CO_(2)(环境3)、高温-干旱-高CO_(2)(环境4)四种环境来模拟小麦生长环境,并对小麦整个生长周期状况进行检测,从而分析小麦在不同气候环境的适应性情况。研究显示,小麦在高灌溉、高温度、高CO_(2)浓度的环境3下综合性表现最好,保障小麦营养物的积累,小麦整体质量表现最佳。

关键词：小麦适应性分析 CO_(2)浓度温度干物质积累

Study on Color Information Degradation Induced byγ-ray Radiation in CMOS Cameras

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原子能科学技术 2023年第12期57卷 2337-2347页

作者： LI Kunfang FENG Jie wang haichuan LI Yudong WEN Lin LI Zhenzhe GUO Qi Xinjiang Technical Institute of Physics and Chemistry Chinese Academy of SciencesUrumqi 830011China Xinjiang Key Laboratory of Electronic Information Material and Device Urumqi 830011China University of Chinese Academy of Sciences Beijing 100049China Officers College of PAP Chengdu 610213China

Theγ-rays are widely and abundantly present in strong nuclear radiation environments,and when they act on the camera equipment used to obtain environmental visual information on nuclear robots,radiation effects will occur,which will degrade the performance of the camera system,reduce the imaging quality,and even cause catastrophic consequences.Color reducibility is an important index for evaluating the imaging quality of color camera,but its degradation mechanism in a nuclear radiation environment is still unclear.In this paper,theγ-ray irradiation experiments of CMOS cameras were carried out to analyse the degradation law of the camera’s color reducibility with cumulative irradiation and reveal the degradation mechanism of the color information of the CMOS camera underγ-ray irradiation.The results show that the spectral response of CMOS image sensor(CIS)and the spectral transmittance of lens after irradiation affect the values of a^(*)and b^(*)in the LAB color model.While the full well capacity(FWC)of CIS and transmittance of lens affect the value of L^(*)in the LAB color model,thus increase color difference and reduce brightness,the combined effect of color difference and brightness degradation will reduce the color reducibility of CMOS cameras.Therefore,the degradation of the color information of the CMOS camera afterγ-ray irradiation mainly comes from the changes in the FWC and spectral response of CIS,and the spectral transmittance of lens.

关键词： CMOS camera color reducibility γ-ray nuclear radiation

Statistical analysis and interpretation on lightning impulse breakdown voltages of ester liquids under varying field uniformity

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High Voltage 2024年第1期9卷 22-34页

作者： haichuan Yu Qiang Liu Zhongdong wang Department of Electrical and Electronic Engineering The University of ManchesterManchesterUK Department of Engineering University of ExeterExeterUK

Ester liquids(ELs),as the alternative transformer liquids to the conventional mineral oils(MOs),have been increasingly used in power transformers with high voltage ratings.Among various properties,the lightning impulse breakdown voltages(LIBDVs)have been studied elaborately in the past two decades under different electric field uniformities.The electric field uniformities do have an effect on the breakdown characteristics,for example,breakdown mechanisms,polarity effects,and differences of LIBDV between ELs and MOs,which is quantitatively investigated based on the LIBDVs collected from the literatures.The breakdown mechanism transition phenomenon between streamer initiation dominated breakdown and streamer propagation dominated breakdown has been reviewed firstly.Then,the transition field factor boundaries to observe the polarity effect on LIBDVs are taken at around 20 for ELs and 10 for MOs.Besides,the transition field factor boundaries to observe the LIBDV distinctions between ELs and MOs are about 109 and 14 under positive and negative lightning impulse,respectively.The systematic analysis and interpretation on the transition field factor boundaries among different phenomena can provide insights on insulation design of ELs filled power transformers.

关键词： field lightning breakdown