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基于预想故障信息的矿山电网可靠性评估

煤炭工程 2024年第1期56卷 162-169页

作者：于群王安东古锋刘韬山东科技大学电气与自动化工程学院山东青岛266590 兖州能源集团股份有限公司机电管理部山东济宁273500

随着煤矿安全和生产对电网稳定性依赖程度的不断提高,准确地评估煤矿供电系统的安全水平变得日益重要。一般电网评估策略常利用平均状态水平来表征系统的安全性,其忽略了电网中极端个体元件对于整个系统的影响,因此不能准确地描述煤矿... 详细信息

随着煤矿安全和生产对电网稳定性依赖程度的不断提高,准确地评估煤矿供电系统的安全水平变得日益重要。一般电网评估策略常利用平均状态水平来表征系统的安全性,其忽略了电网中极端个体元件对于整个系统的影响,因此不能准确地描述煤矿供电系统的安全水平。结合煤矿电网实际运行特点,提出了一种基于预想故障信息的可靠性评估策略。该策略通过分析系统整体与个体的综合评估方法来评判系统的安全等级;与此同时,在权衡效益与安全的前提条件下,提出了可靠性成本与停电损失成本两个经济性指标,并利用最小二乘算法对系统历史数据进行曲线拟合,得到系统经济和安全的特征权重以及用来描述系统安全性与经济性的关系曲线图,从而获取系统的最优运行方式。最后通过实际算例验证了所提评估策略的可行性。

关键词：矿山电网预想故障信息安全经济综合评估最优运行方式

Burst mode enabled ultrafast laser inscription inside gallium arsenide

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International Journal of Extreme Manufacturing 2022年第4期4卷 179-187页

作者： andong wang Pol Sopeña David Grojo Aix-Marseille University CNRSLP3UMR734113009 MarseilleFrance

Ultrafast laser inscription(ULI)inside semiconductors offers new perspectives for 3D monolithic structures to be fabricated and new functionalities to be added in electronic and photonic ***,important challenges remain because of nonlinear effects such as strong plasma generation that distort the energy delivery at the focal point when exposing these materials to intense infrared *** to now,the successful technological demonstrations have primarily concentrated on silicon(Si).In this paper,we target at another important semiconductor:gallium arsenide(GaAs).With nonlinearities higher than those of Si,3D-machining of GaAs with femtosecond pulses becomes even ***,we show that the difficulty can be circumvented by burst-mode *** generate and apply trains of pulses at terahertz repetition rates for efficient pulse-to-pulse accumulation of laser-induced free carriers in the focal region,while avoiding an overdose of prefocal *** superior performance of burst-mode irradiation is confirmed by a comparative study conducted with infrared luminescence *** results indicate a successful reduction of the plasma density in the prefocal region so that higher pulse energy reaches the focal *** same method is applied to identify optimum irradiation conditions considering particular cases such as asymmetric pulse trains and aberrated *** 64-pulse trains,we successfully manage to cross the writing threshold providing a solution for ULI inside *** application potential is finally illustrated with a stealth dicing demonstration by taking benefit of the burst *** irradiation method opens wide possibilities for 3D structuring inside GaAs by ULI.

关键词： laser processing ultrafast laser inscription THz-repetition-rate burst semiconductors gallium arsenide

预混合法和预合金法制备Cu-Sn粉末的显微组织和烧结性能

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粉末冶金工业 2024年第1期34卷 11-16页

作者：陈朋飞莫文剑易翠王安东江苏大学材料科学与工程学院江苏镇江212013 江苏省集萃金属研究所江苏苏州215506 苏州铜宝锐新材料有限公司江苏苏州215000

使用预混合法和预合金法制备了Cu-Sn粉末,研究了Cu-Sn粉末在烧结过程中的显微组织和物相变化规律,同时测试了Cu-Sn粉末在不同温度条件下的烧结性能。实验结果显示,通过预混合法制备的CuSn10、CuSn20粉末烧结态组织由α相和α+δ共析组... 详细信息

使用预混合法和预合金法制备了Cu-Sn粉末,研究了Cu-Sn粉末在烧结过程中的显微组织和物相变化规律,同时测试了Cu-Sn粉末在不同温度条件下的烧结性能。实验结果显示,通过预混合法制备的CuSn10、CuSn20粉末烧结态组织由α相和α+δ共析组织组成,而预合金法制备的CuSn10粉末烧结态组织则由单一的α相组成。两种方法制备的粉末在相同条件下烧结后,预混合Cu-Sn粉末的烧结体相对于生坯产生了膨胀,预合金铜锡粉末烧结体则表现为收缩,且预合金Cu-Sn粉末烧结后的断裂强度、含油率和有效含油率均高于预混合粉末。

关键词：铜锡合金粉末冶金物相变化烧结性能微观结构

Robust tensor decomposition via orientation invariant tubal nuclear norms

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Science China(Technological Sciences) 2022年第6期65卷 1300-1317页

作者： wang andong ZHAO QiBin JIN Zhong LI Chao ZHOU GuoXu School of Automation Guangdong University of TechnologyGuangzhou 510006China School of Computer Science and Engineering Nanjing University of Science and TechnologyNanjing 210094China Tensor Learning Team RIKEN Center for Advanced Intelligence ProjectTokyo 103-0027Japan Key Laboratory of Intelligent Perception and System for High-Dimensional Information Ministry of EducationNanjing 210094China Key Laboratory of Intelligent Detection and the Internet of Things in Manufacturing Ministry of EducationGuangzhou 510006China

Aiming at recovering an unknown tensor(i.e.,multi-way array)corrupted by both sparse outliers and dense noises,robust tensor decomposition(RTD)serves as a powerful pre-processing tool for subsequent tasks like classification and target detection in many computer vision and machine learning ***,tubal nuclear norm(TNN)based optimization is proposed with superior performance as compared with other tensorial nuclear norms for tensor ***,one major limitation is its orientation sensitivity due to low-rankness strictly defined along tubal orientation and it cannot simultaneously model spectral low-rankness in multiple *** this end,we introduce two new tensor norms called OITNN-O and OITNN-L to exploit multi-orientational spectral low-rankness for an arbitrary K-way(K≥3)*** further formulate two RTD models via the proposed norms and develop two algorithms as the ***,we establish non-asymptotic error bounds which can predict the scaling behavior of the estimation *** on real-world datasets demonstrate the superiority and effectiveness of the proposed norms.

关键词： tensor recovery t-SVD estimation error tensor completion

Initial corrosion behavior and mechanism of 7B04 aluminum alloy under acid immersion and salt spray environments

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Chinese Journal of Aeronautics 2022年第1期35卷 277-289页

作者： Yangguang ZHANG Yueliang CHEN Yong ZHANG Guixue BIAN Chenguang wang andong wang Naval Aviation University Qingdao Campus Qingdao 266041China

The initial corrosion behavior and mechanism of 7B04 aluminum alloy under acid immersion and salt spray environments(pH=3.5)are studied by Scanning Electron Microscope(SEM),optical microscope,Fourier Transform Infrared Spectroscopy(FT-IR),X-Ray Diffraction(XRD),potentiodynamic polarization,Electrochemical Impedance Spectroscopy(EIS),and Scanning Kelvin Probe(SKP).The results show that pitting corrosion occurs at the initial corrosion stage,and the potential difference between the second phase particles is the main cause of *** pits on different locations gradually expand and coalesce with the proceeding of *** main components of corrosion products are Al_(2)O_(3),Al(OH)_(3),and AlCl_(3),and the generation rate of the corrosion product layer under the salt spray environment is larger than that under acid immersion *** both environments,the Volta potential distribution first disperses and then concentrates,while the charge transfer resistance first decreases and then increases with the corrosion *** Volta potential gradually shifts in a positive direction,indicating that corrosion products have an inhibitory effect on *** the same corrosion time,the corrosion product layer resistance and the expectation of the Volta potential of the salt spray sample are higher than those of the immersion ***,the corrosion current density for the salt spray sample is significantly lower than the immersion sample,which indicates that the thicker the corrosion product layer,the stronger the inhibition of corrosion reaction.

关键词： 7B04 aluminum alloy Acid salt spray Corrosion mechanism Corrosion products Electrochemistry Scanning Kelvin probe

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耐600℃及以上高温钛合金研究进展

钢铁钒钛 2024年第2期45卷 42-50,71页

作者：王冰相志磊周宗熠申高亮黄景存韩竟俞王安东陈子勇北京工业大学材料与制造学部北京100124

概述了国内外耐600℃及以上高温钛合金的研究现状,在总结英国IMI834、美国Ti-1100、俄罗斯BT36、中国Ti60、TG6、Ti600、Ti65、Ti750等合金组成及性能的基础上,指出了制约高温钛合金发展的主要瓶颈,并针对目前的研究现状,提出了一些可... 详细信息

概述了国内外耐600℃及以上高温钛合金的研究现状,在总结英国IMI834、美国Ti-1100、俄罗斯BT36、中国Ti60、TG6、Ti600、Ti65、Ti750等合金组成及性能的基础上,指出了制约高温钛合金发展的主要瓶颈,并针对目前的研究现状,提出了一些可供借鉴的解决办法。从提高高温钛合金的热稳定性、热强性和高温蠕变强度的角度对制备Ti基复合材料、优化合金成分、优化热加工工艺调控组织、控制α2相的尺寸、数量、体积分数和形态等方面进行了未来展望,为高性能高温钛合金的研制提供了理论基础和参考作用。

关键词：高温钛合金热稳定性热强性蠕变强度涂层

Distribution and invasion of Spartina alterniflora within the Jiaozhou Bay monitored by remote sensing image

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Acta Oceanologica Sinica 2022年第6期41卷 31-40页

作者： Jianbu wang Zhaoyang Lin Yuanqing Ma Guangbo Ren Zijun Xu Xiukai Song Yi Ma andong wang Yajie Zhao Laboratory of Marine Physics and Remote Sensing First Institute of OceanographyMinistry of Natural ResourcesQingdao 266061China School of Information and Electrics Beijing Institute of TechnologyBeijing 100081China Shandong Marine Resources and Environment Research Institute Shandong Provincial Key Laboratory of Restoration for Marine EcologyYantai 264006China North China Sea Environmental Monitoring Center State Oceanic AdministrationQingdao 266033China Shandong Yellow River Delta National Nature Reserve Administration Committee Dongying 257091China

Spartina alterniflora as an alien invasive plant,poses a serious threat to the ecological functions of the coastal wetland of the Jiaozhou *** of 2019,the distribution area of *** in the Jiaozhou Bay has reached more than 500 hm^(2).For this reason,combined with field surveys,remote sensing monitoring of the invasion *** in the Jiaozhou Bay has been carried *** accurately identify *** within the Jiaozhou Bay coastal wetland,we used a new method which is an implement of deep convolutional neural network,and by which we got a higher accuracy than the traditional *** on distribution of *** extracted by the proposed method,the temporal and spatial distribution characteristics of *** were *** then combined with environmental factors,the invasion mechanism of *** in the Jiaozhou Bay was analyzed in *** the monitoring results,it can be seen that *** in Jiaozhou Bay is mainly distributed in the beaches near the Yanghe River Estuary and its southern side,the Dagu River Estuary and the Nü*** alterniflora first broke out near the Yanghe River Estuary and gradually spread to the tidal flats near the Nü*** Dagu River Estuary is dominated by ***,whose area has not changed much over the years,and a small amount of *** has invaded later.

关键词： Spartina alterniflora remote sensing coastal wetland deep residual network

典型人工甜味剂在城市污水厂不同工艺段的分布和去除特征

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内蒙古工业大学学报（自然科学版） 2024年第1期43卷 70-76页

作者：岳峻辉王安冬赵一非张余婧郭伟北京工业大学城市建设学部北京100124 北京工业大学大型仪器开放共享平台北京100124

研究调查了6种人工甜味剂(ASs)安赛蜜(ACE)、甜蜜素(CYC)、糖精(SAC)、阿斯巴甜(ASP)、三氯蔗糖(SUC)和纽甜(NEO)在城市污水厂不同工艺段的分布、进出水负荷和去除效果。研究表明,进水CYC和SAC含量最多,占ASs总浓度大于67%,而ASP未被检... 详细信息

研究调查了6种人工甜味剂(ASs)安赛蜜(ACE)、甜蜜素(CYC)、糖精(SAC)、阿斯巴甜(ASP)、三氯蔗糖(SUC)和纽甜(NEO)在城市污水厂不同工艺段的分布、进出水负荷和去除效果。研究表明,进水CYC和SAC含量最多,占ASs总浓度大于67%,而ASP未被检出。ASs进水负荷为0.0037(NEO)~1.32(CYC)g/d·1000p^(-1),出水负荷为0.0015(NEO)~0.43(SUC)g/d·1000p^(-1)。ACE、CYC和SAC去除效率>88%,主要发生在二级处理段,而NEO与SUC去除效率分别<62%和<10%,主要发生在一级和深度处理段。

关键词：人工甜味剂城市污水厂污染分布污染负荷去除效率

Dynamic model and response characteristics of liquid desiccant air-conditioning system driven by heat pump

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Building Simulation 2021年第6期14卷 1773-1784页

作者： Bowen Guan Xiaohua Liu Tao Zhang andong wang Department of Building Science and Technology Tsinghua UniversityBeijing 100084China Deportment of Electrical and Electronic Engineering University of Hong KongHong Kong 999077China

The liquid desiccant air-conditioning system is considered as an energy-efficient alternative to the vapor compression *** dynamic response characteristics of the system under variable cooling load play an important role in the air temperature and humidity control performance of the ***,the dynamic response characteristics have not been fully revealed in previous ***,a dynamic model for a heat pump driven liquid desiccant air-conditioning(HPLDAC)system is established to investigate the dynamic response characteristics of the system in this ***,experiments were conducted to validate the accuracy of the dynamic *** simulation results show a good agreement with the experimental *** simulation results reveal that evaporating water from the solution is a time-consuming process,compared to adding water to the *** spends a long time for the HPLDAC system to decrease the high relative humidity of supply air to a low value,which limits the air temperature and humidity control performance of the *** upper band for the water replenishing value opening(△φup)is a crucial parameter to improve the ***△φup decreases from 1.0%产to 0.25%,the time consumed to reduce the supply air relative humidity to the new lower set value can be saved by 30.6%.

关键词： dynamic model response characteristics liquid desiccant-temperature and humidity independent control air conditioning system