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Axial emission characteristics of an ionic liquid electrospray thruster with a circular emitter

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Chinese Journal of Aeronautics 2025年第1期38卷 297-305页

作者： Cheng YANG Jiawei LUO Xiangbei wu Yan SHEN School of Aeronautics and Astronautics Sun Yat-sen UniversityShenzhen 518107China Shenzhen Key Laboratory of Intelligent Microsatellite Constellation Shenzhen 518107China

Ionic Liquid Electrospray Thrusters(ILETs)are well suited for micro-nano satellite applications due to their small size,low power consumption,and high specific ***,the limited thrust of a single-emitter ILET restricts its use in space *** optimize the performance of ILETs and make them suitable for a wider range of space missions,we designed a Circular-emitter ILET(CILET)to convert a one-dimensional(point)emission into a twodimensional(line)*** CILET can self-organize multiple Taylor cones *** cones were photographed and the axial emission currents were measured under different voltage and pressure difference conditions with a CILET experimental *** emission can be divided into two stable states and one unstable state based on the flow and current *** current in Stable state Ⅰ increases non-linearly with the voltage,while that in Stable state Ⅱ is nearly linear with respect to the *** number of cones increases with the voltage in stable states,while the cones become short and crowded under high-voltage *** variation law of the number of cones can be explained with the self-organization *** variation in the current exhibits a good correlation with the number of *** study demonstrates the feasibility of circular emitters and experimentally indicates that the emission current is improved by approximately two orders of magnitude compared to that of a single capillary.

关键词： Electrospray Ionic liquid thruster Self-organize Emitter Taylor cone

Crustal magma oxidation state and endowments in porphyry copper deposits

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Science China Earth Sciences 2025年第1期68卷 226-236页

作者： Yumin AI Massimo CHIARADIA Chao wu Huayong CHEN Key Laboratory of Mineralogy and Metallogeny Guangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou510640China University of Chinese Academy of Sciences Beijing100049China Department of Earth Sciences University of GenevaGeneva1205Switzerland Guangdong Provincial Key Laboratory of Mineral Physics and Materials Guangzhou510640China

Porphyry copper deposits(PCDs)supply the majority of the world's copper(Cu)as well as significant amounts of molybdenum(Mo)and gold(Au).The formation of these deposits is controlled by a variety of geological factors,among which the magmatic oxidation is one of the focuses of current *** study investigates the redox characteristics of arc magmas by analyzing the ratio of vanadium(V)to scandium(Sc)and its correlation with the oxygen fugacity(fO2)of magmas from arcs of various crustal thicknesses *** compiled an extensive dataset of published V/Sc values and studied the partition coefficients of Vand Sc between minerals and silicate melts across various magmatic *** results demonstrate that fractional crystallization of magnetite markedly reduces V/Sc values of the residual ***,magnesium number(Mg#)at the onset of magnetite fractionation is strongly positively correlated with fO_(2)of the equilibrium *** on this,the oxidation of arc magmas from different crustal thicknesses can be *** result suggests that magmas generated in crusts thicker than 20 km tend to be more oxidized with increasing crust *** trend is attributed to enhanced intracrustal differentiation processes involving garnet and amphibole,particularly in mature island and continental *** contrast,magmas in thinner arc crusts(<20 km),which are significantly influenced by subducted slab materials,display higher oxidation states than most of their thicker crust *** findings suggest that both subduction dynamics and crustal thickness play a vital role in determining the oxidation state of arc magmas and,consequently,their capacity to generate *** oxidized,primitive arc magmas are less favorable for PCD formation due to that they tend to experience magnetite fractionation and thus sulfide saturation in the early stage of magma evolution,a process leading to copper *** the contrary,thick arcs where magnet

关键词： Magma evolution V/Sc systematics Magnetite Oxygen fugacity Porphyry copper deposits

Prediction of intrusive gas pores caused by resin burning in sand core for iron castings

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China Foundry 2025年第1期22卷 23-32页

作者： Ji-wu Wang Xiao-long Wang Yu-cheng Sun Yu-hang Huang Xiu-ming Chen Xiong-zhi wu Na Li Jin-wu Kang Tao Jing Tian-you Huang Hai-liang Yu School of Mechanical Electronic and Control EngineeringBeijing Jiaotong UniversityBeijing 100044China Weichai Power Co. Ltd.Weifang 261061ShandongChina School of Mechanical Engineering Central South UniversityChangsha 41000China School of Materials Science and Engineering Key Laboratory for Advanced Materials Processing TechnologyTsinghua UniversityBeijing 100084China

In the production of castings,intrusive gas pore represents a kind of common defects which can lead to leakage in high gas-tightness requirement castings,such as cylinder blocks and cylinder heads for *** occurs due to the intrusion of gases generated during the resin burning of the sand core into castings during the casting ***,a gas generation and flow constitution model was established,in which the gas generation rate is a function of temperature and time,and the flow of gas is controlled by the gas release,conservation,and Darcy's *** heat transfer and gas flow during casting process was numerically *** dangerous point of cores is firstly identified by a virtual heat transfer method based on the similarity between heat transfer and gas flow in the sand *** gas pores in castings are predicted by the gas pressure,the viscosity and state of the melt for these dangerous *** distinct sand core structures were designed and used for the production of iron castings,and the simulated gas pore results were validated by the obtained castings.

关键词： gas pore numerical simulation iron casting sand core resin

A quantum-search-based multi-classifier for image recognition

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Science China(Physics,Mechanics & Astronomy) 2025年第1期68卷 17-27页

作者： Lu Liu Xingyu wu Lufan Zhang Chuan Wang School of Artificial Intelligence Beijing Normal UniversityBeijing 100875China Applied Optics Beijing Area Major Laboratory Beijing Normal UniversityBeijing 100875China

The multi-class classification of images is a pivotal challenge within the realm of image *** the volume of visual data continues to expand,there is a burgeoning interest in harnessing the unique capabilities of quantum computation to augment the efficiency of classification ***,many existing methods for training quantum image multi-classifiers parallel classical machine learning techniques,where the requisite circuit measurements increase linearly with the volume of training *** work introduces a novel approach for training a quantum image multi-classifier based on the quantum search *** have meticulously conducted rigorous experiments on a handwritten digit dataset,a classic benchmark in the *** results have been meticulously compared with previous works,and the comparative analysis not only validates the efficiency of our proposed approach,requiring only O(N/b)measurements during training,but also highlights a significant quadratic speedup of the algorithm.

关键词： quantum computation image recognition quantum search algorithm

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浅论高校图书馆计算机网络管理措施

电子测试 2014年第12X期25卷 70-72页

作者：吴永祥朱永武南京航空航天大学保卫处 211100

图书对高校日常教学具有重要的作用。图书馆属于高校数据和文字的集中地。高校建立图书馆不仅可以实现学校与社会的交流,还能更好地服务于本校学生。图书馆计算机网络体系始终服务于科学研究和教育教学。数据库的建立对学校具有积极作... 详细信息

图书对高校日常教学具有重要的作用。图书馆属于高校数据和文字的集中地。高校建立图书馆不仅可以实现学校与社会的交流,还能更好地服务于本校学生。图书馆计算机网络体系始终服务于科学研究和教育教学。数据库的建立对学校具有积极作用。为实现对高校文献资料的数字化管理,可以将互联网技术运用于其中。数字化管理模式能有效提升高校图书馆运行水平,为广大师生带来极大的便利。但是,面对图书馆文献数据的增加以及信息技术的发展,高校图书馆的计算机网络管理出现了各种问题。本文就高校图书馆计算机网络管理进行简要分析。

关键词：高校图书馆计算机网络管理

Assessment of internal exposure risk from metals pollution of occupational and non-occupational populations around a non-ferrous metal smelting plant

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Journal of Environmental Sciences 2025年第1期147卷 62-73页

作者： Yingjun wu Mengdie Qi Hang Yu Guiying Li Taicheng An Guangdong-Hong Kong-Macao Joint Laboratory for Contaminants Exposure and Health Guangdong Key Laboratory of Environmental Catalysis and Health Risk ControlInstitute of Environmental Health and Pollution ControlGuangdong University of TechnologyGuangzhou 510006China Guangzhou Key Laboratory of Environmental Catalysis and Pollution Control Key Laboratory for City Cluster Environmental Safety and Green DevelopmentSchool of Environmental Science and EngineeringGuangdong University of TechnologyGuangzhou 510006China

Non-ferrous metal smelting poses significant risks to public ***,the copper smelting process releases arsenic,a semi-volatile metalloid,which poses an emerging exposure risk to both workers and nearby *** comprehensively understand the internal exposure risks of metal(loid)s from copper smelting,we explored eighteen metal(loid)s and arsenic metabolites in the urine of both occupational and non-occupational populations using inductively coupled plasma mass spectrometry with high-performance liquid chromatography and compared their health *** showed that zinc and copper(485.38 and 14.00μg/L),and arsenic,lead,cadmium,vanadium,tin and antimony(46.80,6.82,2.17,0.40,0.44 and 0.23μg/L,respectively)in workers(n=179)were significantly higher compared to controls(n=168),while Zinc,tin and antimony(412.10,0.51 and 0.15μg/L,respectively)of residents were significantly higher than ***,workers had a higher monomethyl arsenic percentage(MMA%),showing lower arsenic methylation *** appointment analysis identified arsenic,lead,cadmium,antimony,tin and thallium as co-exposure metal(loid)s from copper smelting,positively relating to the age of *** hazard index(HI)of workers exceeded 1.0,while residents and control were approximately at ***,all three populations had accumulated cancer risks exceeding 1.0×10^(-4),and arsenite(AsIII)was the main contributor to the variation of workers and ***,residents living closer to the smelting plant had higher health *** study reveals arsenic exposure metabolites and multiple metals as emerging contaminants for copper smelting exposure populations,providing valuable insights for pollution control in non-ferrous metal smelting.

关键词： Arsenic metabolites Metal(loid)s Non-ferrous metal smelting Human biomonitoring Exposure Urine

竞争对手技术相似性与技术能力的企业技术机会识别

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情报杂志 2025年第2期44卷 92-100页

作者：吴洁刘子钰谢小东盛永祥于娱江苏科技大学经济管理学院镇江212003 南京审计大学商学院南京211815

[研究目的]在激烈的市场竞争中,企业如何实现高水平科技自立自强至关重要,在竞争对手视角下进行技术机会识别有助于企业实现创新突破,提升核心竞争力。[研究方法]构建技术相似性和技术能力二维矩阵选择竞争对手,在竞争对手视角下使用关... 详细信息

[研究目的]在激烈的市场竞争中,企业如何实现高水平科技自立自强至关重要,在竞争对手视角下进行技术机会识别有助于企业实现创新突破,提升核心竞争力。[研究方法]构建技术相似性和技术能力二维矩阵选择竞争对手,在竞争对手视角下使用关联规则挖掘算法识别技术机会,最后利用对手关注度对技术机会进行评估,获取对手关注度较低的技术机会。[研究结果/结论]通过对比实验,证明在技术相似性与技术能力的基础上进行竞争对手选择能够提升识别机会的准确率。使用自然语言处理领域专利数据,以腾讯科技有限公司为例,识别出数据处理和计算模型、信息和通信技术应用、图像和视频处理与识别三个方向的技术机会,为企业的研发创新提供了参考依据。

关键词：竞争对手技术机会识别技术相似性技术能力专利分析关联规则挖掘

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γ-线对大白鼠学习能力的影响

心理学报 1984年第3期 325-330页

作者：吴永祥王秉光航空医学研究所

本文是以大白鼠在三等分迷宫仪中学习防御性条件反应的方法,观察800拉特γ-线对大白鼠学习能力的影响。实验结果表明,大白鼠的学习能力是下降的,其表现为每天学习的正确率低,达到学会标准所需学习次数增加;反应运动时延长;主动躲避反应... 详细信息

本文是以大白鼠在三等分迷宫仪中学习防御性条件反应的方法,观察800拉特γ-线对大白鼠学习能力的影响。实验结果表明,大白鼠的学习能力是下降的,其表现为每天学习的正确率低,达到学会标准所需学习次数增加;反应运动时延长;主动躲避反应的出现率降低。根据受照动物的特点,我们认为:作为判断学习和记忆能力的指标,反应运动时比正确率更好一点。

关键词：大白鼠出现率拉特三等分家鼠属反应实验动物记忆能力迷宫学会标准

Research progress on the physiological,biochemical and molecular regulatory mechanisms of fruit tree responses to high-temperature stress

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Horticultural Plant Journal 2025年第1期11卷 1-14页

作者： Que Wang Yaqiong wu Wenlong wu Lianfei Lyu Weilin Li State Key Laboratory of Tree Genetics and Breeding Co-Innovation Center for Sustainable Forestry in Southern ChinaNanjing Forestry UniversityCollege of Forestry and GrasslandNanjingJiangsu 210037China Institute of Botany Jiangsu Province and Chinese Academy of Sciences(Nanjing Botanical Garden Mem.Sun Yat-Sen)Jiangsu Key Laboratory for the Research and Utilization of Plant ResourcesNanjingJiangsu 210014China

Fruit trees face various adverse environmental factors,such as extreme hydrothermal changes,soil salinization and low precipitation,leading to different types of *** temperature is one of the main factors affecting the growth of fruit trees,and an appropriate ambient temperature is a necessary condition for the normal growth and development of fruit *** the 20th century,due to the intensification of the greenhouse effect and global warming,there has been a significant increase in the occurrence and duration of extreme hot weather in summer has been occurring frequently and for longer ***,the growth and production of fruit trees are affected by severe hightemperature ***,this paper primarily summarized the impacts of high-temperature stress on fruit growth and development,flowering,fruiting,fruit setting and *** also discussed the physiological and biochemical responses of fruit trees to high-temperature stress,research progress on the molecular mechanisms and signal transduction pathways underlying fruit tree resistance to heat or high temperature,and research on the investigation of relevant metabolites of fruit trees under stress *** future research directions were discussed,and prospects and potential difficulties were proposed to serve a reference for further investigation on the high-temperature tolerance of fruit trees.

关键词： Heat shock Heat resistance Regulatory mechanisms miRNA Fruit crop