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智慧矿山中氧气瓶与乙炔气瓶距离监测技术的实现

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内蒙古科技大学学报 2024年第1期43卷 57-61页

作者：李淑佳王月明张昊内蒙古科技大学信息工程学院内蒙古包头014010

智慧矿山检修区内氧气瓶与乙炔气瓶距离过近易造成严重安全事故,针对氧气瓶与乙炔气瓶距离预警依靠人工检查效率较低的问题,提出一种单目视频下氧气瓶与乙炔气瓶安全距离监测方法。该方法基于改进的DeepLabv3+语义分割模型对氧气瓶与乙... 详细信息

智慧矿山检修区内氧气瓶与乙炔气瓶距离过近易造成严重安全事故,针对氧气瓶与乙炔气瓶距离预警依靠人工检查效率较低的问题,提出一种单目视频下氧气瓶与乙炔气瓶安全距离监测方法。该方法基于改进的DeepLabv3+语义分割模型对氧气瓶与乙炔气瓶图像进行分割处理,根据氧气瓶与乙炔气瓶自标定后计算得到监测距离,最终构建实时安全预警的算法,对智慧矿山中不合规场景进行报警处理。结果表明,当氧气瓶与乙炔气瓶实际间距分别为350,450,550cm条件下,目标算法测试结果的平均误差分别为2.37%,4.93%5.18%。这种方法的实际应用提高了单目视觉下氧气瓶与乙炔气瓶距离的自动监测效率,降低了人力成本,避免发生安全事故。

关键词：氧气瓶乙炔气瓶图像分割单目测距安全预警

一种基于拓扑结构变化的主动配电网自适应保护方法

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电工技术 2024年第7期 110-113页

作者：韩笑李姝佳王钢陈楠南京工程学院电力工程学院江苏南京211167

随着逆变型分布式电源大量接入配电网,配电网运行方式灵活多变,保护方案的设计与保护装置的动作范围受拓扑变化的影响。在此背景下并结合工程实际,提出一种基于拓扑结构变化的主动配电网自适应保护方法。通过多点量测信息感知配电网的... 详细信息

随着逆变型分布式电源大量接入配电网,配电网运行方式灵活多变,保护方案的设计与保护装置的动作范围受拓扑变化的影响。在此背景下并结合工程实际,提出一种基于拓扑结构变化的主动配电网自适应保护方法。通过多点量测信息感知配电网的运行状态,利用电压量和电流量之间的相关性,对拓扑结构的变化进行识别。然后,根据拓扑结构的变化,形成新的关联矩阵,自适应调整系统的保护方案与参数。最后,通过仿真验证了所提出的方法有效性。

关键词：拓扑识别主动配电网欧氏距离自适应保护

Dynamic Analysis of Fractional-Order Memristive Chaotic System

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Journal of Harbin Institute of Technology(New Series) 2018年第2期25卷 50-58页

作者： Dawei Ding shujia li Nian Wang School of Electronics and Information Engineering Anhui University

For the purpose of investigating the nonlinear dynamics of the system,a fractional-order Chua's circuit based on the memristor deriving from the integer-order counterparts is provided. Firstly,according to the Lyapunov's indirect method,the stability analysis of the memristive system is made,and it shows that when the fractional-orders parameter of memristive system passes a critical value,the system loses the stability and bifurcation occurs. Then the bifurcation and chaos behaviors of fractional-order memristive system are show n using bifurcation diagrams w ith varying fractional orders of the system and other parameters. Furthermore,the chaotic behaviors of memristive chaotic system are proved by the waveform,phase plot and largest Lyapunov exponent diagram. Finally,theoretical results are illustrated and validated with the given numerical simulations.

关键词： memristor dynamical behavior fractional-order stability

Novel process for facile preparation of mesoporous silica-based materials with controllable pore structure from coal fly ash Author links open overlay panel

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Particuology 2024年第8期91卷 128-137页

作者： Jian-ming Gao Zhen li shujia Ma Yuanyuan Zhang Fangqin Cheng Institute of Resources and Environment Engineering State Environmental Protection Key Laboratory of Efficient Utilization Technology of Coal Waste ResourcesShanxi Collaborative Innovation Center of High Value-added Utilization of Coal-related WastesShanxi UniversityTaiyuan 030006China

Extraction of silica from fly ash to produce mesoporous silica materials is one of the most important utilization *** silica could not be synthesized on a large-scale by conventional sol-gel *** this paper,facile preparation of mesoporous silica with controllable pore structure from fly ash by the template-free process via two steps of mineral phase transformation and selective acid etching was *** influence of crystalline structure and acid etching degree on structure of as-synthesized mesoporous silica materials was revealed,as well as mechanism of crystalline structure transformation and pore structure *** results show that mullite and quartz could be transformed into acid-soluble kaliophilite when fly ash reacted with K_(2)CO_(3)at temperature of 800-1100℃.The hexagonal kaliophilite would be transformed into orthorhombic KAlSiO_(4)-O1 phase when the temperature is controlled at 1100℃.Mesoporous silica with specific surface area of 475.93 m^(2)/g and 642.57 m^(2)/g could be synthesized from activated fly ash with kaliophilite and KAlSiO_(4)-O1 phase crystalline *** controlling the degree of acid etching,mesoporous silica materials with different pore structures can be *** paper provides a cost-effective and large-scale process for the preparation of mesoporous silica materials with controllable pore structure from solid waste fly ash.

关键词： Fly ash Mesoporous silica Crystal transformation Acid etching Controllable pore structure

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喷气涡流纺纱机的发展现状及趋势

棉纺织技术 2024年第9期52卷 90-93页

作者：丁文胜李姝佳赵婷婷景慎全叶晋浦程隆棣东华大学上海201620 中国纺织机械协会北京100028 中国纺织工业联合会产业集群工作委员会北京100020 中国棉纺织行业协会北京100020

为了进一步推进喷气涡流纺纱机的发展,分析了喷气涡流纺纱机在全球的存量分布情况、近8年国内累计进口量及主要省份等市场情况,回顾了喷气涡流纺纱机的国内外技术发展历程,阐述了喷气涡流纺纱技术的创新应用,介绍了相关政策支持,并提出... 详细信息

为了进一步推进喷气涡流纺纱机的发展,分析了喷气涡流纺纱机在全球的存量分布情况、近8年国内累计进口量及主要省份等市场情况,回顾了喷气涡流纺纱机的国内外技术发展历程,阐述了喷气涡流纺纱技术的创新应用,介绍了相关政策支持,并提出了喷气涡流纺纱机的发展思路。认为:我国喷气涡流纺纱机存量具有全球优势地位,正处于产业快速发展期,市场空间广阔,未来随着各种新工艺新技术层出不穷,在开发喷气涡流纺花式纱、包芯纱、细号纱以及差异化原料应用的优势将不断凸显,但国内急需开发拥有自主知识产权的喷气涡流纺纱机,突破关键技术装备和工艺,促使喷气涡流纺纱机在我国稳步健康发展。

关键词：喷气涡流纺纱机花式纱包芯纱细号纱差异化原料

Novel heterozygous USH1C mutation impacts hair cell mechanotransduction and causes progressive hearing loss

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Science Bulletin 2024年第2期69卷 167-172页

作者： Yanyan Jia Gaogan Jia Luo Guo Nan Song Yu-Meng Wang Luoying Jiang Yilai Shu Yan Chen shujia Zhu Huawei li Wenyan li ENT Institute and Otorhinolaryngology Department of Eye&ENT Hospital State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain ScienceFudan UniversityShanghai 200031China Institutes of Biomedical Sciences Fudan UniversityShanghai 200032China NHC Key Laboratory of Hearing Medicine(Fudan University) Shanghai 200031China The Institutes of Brain Science and the Collaborative Innovation Center for Brain Science Fudan UniversityShanghai 200032China Shanghai Center for Brain Science and Brain-Inspired Intelligence Technology Shanghai 201210China Institute of Neuroscience State Key Laboratory of NeuroscienceCAS Center for Excellence in Brain Science and Intelligence TechnologyChinese Academy of SciencesShanghai 200031China Department of Cardiology and Institute for Developmental and Regenerative Cardiovascular MedicineXinhua Hospital Affiliated to Shanghai Jiaotong University School of MedicineShanghai 200092China

Hearing loss is one of the most common sensory disorders worldwide,affecting approximately 466 million people,including 34 million children[1].Genetic mutations accounts for approximately 60%of inherited hearing loss cases[2,3].These genetic changes result in a wide variety of clinical manifestations,ranging from nonsyndromic hearing loss(NSHL)to over 400 syndromes involving hearing loss and from mild adult-onset hearing loss to profound congenital deafness,covering the entire spectrum of Mendelian inheritance.

关键词： mec hearing approximate

OsHYPK-mediated protein N-terminal acetylation coordinates plant development and abiotic stress responses in rice

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Molecular Plant 2022年第4期15卷 740-754页

作者： Xiaodi Gong Yaqian Huang Yan liang Yundong Yuan Yuhao liu Tongwen Han shujia li Hengbin Gao Bo Lv Xiahe Huang Eric linster Yingchun Wang Markus Wirtz Yonghong Wang Institute of Genetics and Developmental Biology Chinese Academy of SciencesBeijing 100101China University of Chinese Academy of Sciences Beijing 100049China State Key Laboratory of Crop Biology College of Life SciencesShandong Agriculture UniversityTaianShandong 271018China State Key Laboratory of Molecular Developmental Biology Institute of Genetics and Developmental BiologyChinese Academy of SciencesBeijing 100101China Centre for Organismal Studies Heidelberg University69120 HeidelbergGermany

N-terminal acetylation is one of the most common protein modifications in eukaryotes,and approximately 40%of human and plant proteomes are acetylated by ribosome-associated N-terminal acetyltransferase A(NatA)in a co-translational ***,the in vivo regulatory mechanism of NatA and the global impact of NatA-mediated N-terminal acetylation on protein fate remain ***,we identify Huntingtin Yeast partner K(HYPK),an evolutionarily conserved chaperone-like protein,as a positive regulator of NatA activity in *** found that loss of OsHYPK function leads to developmental defects in rice plant architecture but increased resistance to abiotic stresses,attributable to perturbation of the N-terminal acetylome and accelerated global protein ***,we demonstrated that OsHYPK is also a substrate of NatA and that N-terminal acetylation of OsHYPK promotes its own degradation,probably through the Ac/N-degron pathway,which could be induced by abiotic *** together,our findings suggest that the OsHYPK-NatA complex plays a critical role in coordinating plant development and stress responses by dynamically regulating NatA-mediated N-terminal acetylation and global protein turnover,which are essential for maintaining adaptive phenotypic plasticity in rice.

关键词： rice OsHYPK N-terminal acetylation protein turnover plant architecture stress response

预变形温度对纳米贝氏体相变动力学及组织的影响

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金属学报 2018年第8期54卷 1113-1121页

作者：徐士新余伟李舒笳王坤孙齐松首钢集团有限公司技术研究院北京100043 北京科技大学工程技术研究院北京100083 首钢集团有限公司绿色可循环钢铁流程北京市重点实验室北京100043

采用热模拟试验机在300~850℃施加20%的压缩预变形后进行300℃等温相变实验,研究了预变形温度对中碳纳米贝氏体钢等温相变动力学及组织的影响。结果表明,预变形工艺使贝氏体相变孕育期显著缩短;低温预变形工艺使贝氏体相变在整个等温区... 详细信息

采用热模拟试验机在300~850℃施加20%的压缩预变形后进行300℃等温相变实验,研究了预变形温度对中碳纳米贝氏体钢等温相变动力学及组织的影响。结果表明,预变形工艺使贝氏体相变孕育期显著缩短;低温预变形工艺使贝氏体相变在整个等温区间内均得到加速,高温预变形工艺使贝氏体相变仅在等温初期得到加速,等温后期相变速率明显减缓;随预变形温度的降低,贝氏体铁素体板条厚度逐渐增加;预变形工艺增加了贝氏体相变组织小角度晶界的频率,低温预变形试样的小角度晶界频率高于高温预变形试样。利用解析相变模型计算了贝氏体等温相变过程中的相变动力学参数n,并对贝氏体相变过程中的形核长大方式进行了判定,发现预变形工艺改变了贝氏体相变的形核位置,低温预变形试样主要以晶隅形核为主,高温预变形试样主要以晶棱、晶面形核为主。

关键词：预变形温度纳米贝氏体相变动力学显微组织解析模型

Mitogen-activated protein kinase cascade MKK7-MPK6 plays important roles in plant development and regulates shoot branching by phosphorylating PIN1 in Arabidopsis

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Mitogen-activated protein kinase cascade MKK7-MPK6 plays imp...