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数字技术赋能冰雪产业链高质量发展研究

企业经济 2024年第6期43卷 49-57页

作者：郭文尧刘维刚长春金融高等专科学校会计学院吉林长春130028 吉林省金融文化研究中心华中科技大学经济学院吉林省社会科学院经济纵横编辑部吉林长春130033

在后冬奥会时期,我国应秉承“冰天雪地就是金山银山”的理念,加速推进“冷冰雪、热经济”。数字技术已逐步应用于冰雪产业链的各层面之中,数字技术如何助力冰雪产业链高质量发展成为关注的焦点。全球的冰雪产业正面临着数字技术的挑战,... 详细信息

在后冬奥会时期,我国应秉承“冰天雪地就是金山银山”的理念,加速推进“冷冰雪、热经济”。数字技术已逐步应用于冰雪产业链的各层面之中,数字技术如何助力冰雪产业链高质量发展成为关注的焦点。全球的冰雪产业正面临着数字技术的挑战,在分析当前冰雪产业链发展面临的数字技术困境后,理清数字技术赋能冰雪产业链发展的内在逻辑,探讨数字技术赋能冰雪产业链高质量发展的路径。据此,应以数字技术推进冰雪产业链资源整合、打造数字化产品、催生冰雪产业新业态、助推冰雪产业链条完善、赋能冰雪产业营销宣传、促进冰雪旅游与文化产业协同发展,为我国的冰雪产业注入新的活力与动能。

关键词：数字技术数字赋能冰雪产业链冰雪经济高质量发展

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某雷达大功率固态发射机的结构与散热设计

现代雷达 2024年第3期46卷 77-81页

作者：石永安王猛刘卫刚李世宗陕西黄河集团有限公司陕西西安710043 四川斯艾普电子科技有限公司四川成都610051

介绍了某雷达大功率固态发射机的结构布局及散热设计,并给出了关键部件的焊接及加工工艺方法。根据功放组件、供电电源及微波合成波导的热耗大小及分布形式,确定了整机液冷散热的热控方式,并进行了散热仿真分析。首先,基于热平衡方程计... 详细信息

介绍了某雷达大功率固态发射机的结构布局及散热设计,并给出了关键部件的焊接及加工工艺方法。根据功放组件、供电电源及微波合成波导的热耗大小及分布形式,确定了整机液冷散热的热控方式,并进行了散热仿真分析。首先,基于热平衡方程计算得到单独模块散热所需的冷却液流量,并据此对冷板结构进行优化设计;然后,将各自冷板等效为独立的二端口流阻器件,在Flomaster中建立整个热控系统的一维流体分配模型,得到分流板的关键结构设计变量;最后,通过FloEFD软件并结合工程实际对整机进行散热仿真分析,得到发射机各器件及组合的表面温度分布云图。结果表明,功放组件芯片的最高温度及温度一致性均满足使用要求,从而验证了整机结构和散热方案的可行性。

关键词：固态发射机散热设计微通道流量分配真空钎焊手工钎焊

Security information factor based airborne radar RF stealth

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Journal of Systems Engineering and Electronics 2015年第2期26卷 258-266页

作者： Fei Wang Mathini Sellathurai weigang liu Jiangjiang Zhou College of Electronic and Information Engineering Nanjing University of Aeronautics and Astronautics School of Electronics Electrical Engineering and Computer Science Queen's University Belfast

Radar radio frequency （RF） stealth is very important in electronic war （EW）, and waveform design and selection. Existing evaluation rules of radar RF stealth include too many parameters of radar and interceptors, such as Schleher interception factor, which makes it difficult to evaluate radar RF stealth technologies if interceptor parameters are unknown. In communication, security capacity has been presented to describe the possible ability to communicate in complete security. Since the essential of the secu- rity capacity is to have the interceptor get none valued information from the emitter, this paper is proposed to study security infor- mation factors taking advantage of mutual information to evaluate radar RF stealth under some conditions. Through analyzing mutual information obtained by the radar and the interceptor, this paper defines the security information factor with and without cooperative jamming. Furthermore, this paper deduces the ratio of the match filter to the match incoherent filter and discuss mutual information received by the interceptor. Numerical simulations illustrate radar RF stealth effects based on the security information factor concept under different conditions.

关键词： mutual information radar signal stealth

基于SSW车载激光移动测量建模系统的3D数字地图作业技术方案

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测绘标准化 2024年第3期40卷 31-36页

作者：贾阳刘卫刚石莹张晓楠陕西天润科技股份有限公司陕西西安710054

为了满足日益增长的3D数字地图应用需求,更好地了解城市的多层次空间,一些城市实施了全域3D数字地图作业。3D数字地图生产中,车载移动测量是其中一项关键性任务。本文结合实例项目,提出利用SSW车载激光移动测量建模系统进行道路数据的... 详细信息

为了满足日益增长的3D数字地图应用需求,更好地了解城市的多层次空间,一些城市实施了全域3D数字地图作业。3D数字地图生产中,车载移动测量是其中一项关键性任务。本文结合实例项目,提出利用SSW车载激光移动测量建模系统进行道路数据的采集及制作的技术方案。通过组合导航解算、点云纠正、影像坐标解算、影像模糊处理、点云赋色、点云去噪、Orbit GT数据制作等处理,实现了带地理参考坐标的彩色点云数据、360?全景影像数据、单个影像数据的快速制作,探索出适用城市3D数字地图生产作业的技术方案。本方案所生产成果经检验合格,并在空间数据共享平台(***)上作为首批可视化三维地图数据提供给公众免费使用,受到社会各界的广泛关注和好评。本方案不仅可推动基于SSW车载激光移动测量建模系统的推广,也可为类似的城市车载移动测量作业提供有效的借鉴和参考。

关键词： 3D数字地图 SSW车载激光移动测量建模系统城市道路点云数据全景影像

BOOTSTRAPPING FOR EXTRACTING RELATIONS FROM LARGE CORPORA

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Journal of Electronics(China) 2008年第1期25卷 89-96页

作者： Li weigang liu Ting Li Sheng Information Retrieval Laboratory School of Computer Science and Technology Harbin Institute of Technology Harbin 150001 China

A new approach of relation extraction is described in this paper. It adopts a bootstrap- ping model with a novel iteration strategy, which generates more precise examples of specific relation. Compared with previous methods, the proposed method has three main advantages: first, it needs less manual intervention; second, more abundant and reasonable information are introduced to represent a relation pattern; third, it reduces the risk of circular dependency occurrence in bootstrapping. Scalable evaluation methodology and metrics are developed for our task with comparable techniques over TianWang 100G corpus. The experimental results show that it can get 90% precision and have excellent expansibility.

关键词： Relation extraction Bootstrapping Patterns Tuples

泥膜共生/臭氧催化氧化工艺在污水处理厂提标改造中的应用

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净水技术 2024年第4期43卷 178-189页

作者：刘伟刚张欢刘欣谷雷严杨卫华刘营营中国石化集团胜利石油管理局有限公司供水分公司山东东营257000 中国城市建设研究院有限公司北京100120

为满足更加严格的污水排放标准,将泥膜共生/臭氧催化氧化工艺在处理水量为2×10^(4) m^(3)/d的东营S污水处理厂提标改造中应用。运行结果表明,新工艺运行后,系统去除有机物和氮素的效率提升。在进水水质、水温等条件基本相同的情况下,... 详细信息

为满足更加严格的污水排放标准,将泥膜共生/臭氧催化氧化工艺在处理水量为2×10^(4) m^(3)/d的东营S污水处理厂提标改造中应用。运行结果表明,新工艺运行后,系统去除有机物和氮素的效率提升。在进水水质、水温等条件基本相同的情况下,生化池反应碳氮比(C/N)由5.74降至4.53,乙酸钠碳源投加量降低58.9%,生化出水化学需氧量(COD_(Cr))、氨氮、总氮质量浓度分别由改造前的52.2、2.2、14.0 mg/L降至42.8、1.2、8.7 mg/L,臭氧催化氧化出水COD_(Cr)均值为20.4 mg/L。改造后泥膜共生系统中,通过扫描电子显微镜(SEM)可观察到密实、连续的生物膜体,检测出Candidatus_competibacte、Nitrospira等优势菌群,有效保证了系统稳定的氮转化和有机物去除效果,生化段溶解性有机物(DOM)去除率由32.4%提高至44.7%,臭氧催化氧化工艺基本将生化出水中残留的对甲酚、甲苯等难降解有机物完全去除。此外,在满足更高排放要求的情况下,提标改造前后水处理药剂成本基本不变。

关键词：泥膜共生臭氧催化氧化优势菌群溶解性有机物(DOM)

Uptake of gas-phase alkylamines by sulfuric acid

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Chinese Science Bulletin 2011年第12期56卷 1241-1245页

作者： YIN Shi GE MaoFa WANG weigang liu Ze WANG DianXun Beijing National Laboratory for Molecular Sciences State Key Laboratory for Structural Chemistry of Unstable and Stable Species Institute ofChemistry Chinese Academy of Sciences Beijing 100190 China

Recent field and experimental studies have suggested that acid-base reactions of alkylamines may play an important role in secondary aerosol formation. We investigated the heterogeneous chemistry of ethylamine (EA), diethylamine (DEA) and triethylamine (TEA) on liquid H2SO4 (1 wt%–80 wt%). Irreversible reactive uptakes were observed for all three alkylamines. The reactive uptake coefficients (γ ) of alkylamines increased with the acid concentration, and the γ value for DEA appeared to increase slightly faster than that of EA and TEA. The potential roles in secondary aerosol formation of different alkylamines are briefly discussed.

关键词：烷基胺吸收硫酸气相酸碱反应摄取系数 TEA 三乙基胺

A Facile Synthesis of Hierarchically Porous TiO2 Microspheres with Carbonaceous Species for Visible-light Photocatalysis

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Journal of Materials Science & Technology 2017年第1期33卷 39-46页

作者： weigang liu Yingming Xu Wei Zhou Xianfa Zhang Xiaoli Cheng Hui Zhao Shan Gao Lihua Huo Key Laboratory of Functional Inorganic Material Chemistry Ministry of Education School of Chemistry and Materials Science Heilongjiang UniversityHarbin 150080 China

Hierarchically porous anatase Ti02 microspheres composited with carbonaceous species （TCS） have been successfully fabricated by a one-step template-free solvothermal method, combined with subsequent low temperature dried process. In this configuration, the TCS microspheres are constructed by the intercon- nected porous nanosheets, which are further assembled with abundant nanoparticles and carbonaceous species. Such composite microspheres possess a large specific surface area of 337 m2 g-l, uniform mesopores of 3.37 nm and high total pore volumes of 0.275 cm3 g-1. The materials exhibit the enhanced photocatalytic properties and stability for degradation of rhodamine B （RhB） under visible-light irradiation. The enhanced photocatalytic degradation performance may be ascribed to their abundant porous structure, large specific surface area and the unique assist-function of the carbonaceous species.

关键词： TiO2 Porous materials Microspheres Nauostructure Photocatalytic properties

Chemical Characteristics and Environmental Records of a Snow-Pit at the Glacier No.12 in the Laohugou Valley, Qilian Mountains

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Journal of Earth Science 2014年第2期25卷 379-385页

作者： Xiaoqing Cui Jiawen Ren Xiang Qin Weijun Sun Guangming Yu Zebin Wang weigang liu State Key Laboratory of Cryospheric Science Cold and Arid Region Environment and Engineering Research InstituteChinese Academy of Sciences Qilian Shan Station of Glaciology and Ecologic Environment Key Laboratory of Arid Climatic Change and Reducing Disaster of Gansu Province Institute of Arid MeteorologyChina Meteorological Administration

In June 2006, samples were collected from a 90 cm snow-pit at an elevation of 5 040 m a.s.l, in the northern branch firn basin of the Glacier No. 12, Laohugou Valley, in the western part of Qilian Mountain, China. Oxygen isotopes （6180） and major soluble ions were measured. Results showed that Ca2＋ is the dominant cation, and SO42 is the dominant anion. All major ions have close positive correlations with eachother except NO3 and NH4＋. 6180 show positive correlation with air temperature. The method of correlation analysis, sea-salt ion tracer and trend analysis were used to determine the source of the chemical components. The correlation analysis and HYSPLIT backward trajectory analysis suggest that atmospheric soluble dust species dominate the chemical signature.

关键词： snow-pit glaciochemistry Glacier No. 12 at Laohugou ion Qilian Mountain.