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弹载GNSS虚拟参考站差分定位技术研究

兵器装备工程学报 2024年第8期45卷 67-73页

作者：吴庆丰宋叶志闫正洲夏凤雨李静罗鹏周善石胡小工赵炽西华师范大学四川南充637002 中国科学院上海天文台上海200030 中国科学院大学北京100049

针对高动态目标定位的长基线实时解算需要,本研究采网络多基站融合技术,结合基准站与线性内插模型算法,生成虚拟参考站伪距观测值,并将虚拟参考站作为基准站与目标进行伪距差分解算,从而解算高动态目标的位置轨迹。通过静态目标与高动... 详细信息

针对高动态目标定位的长基线实时解算需要,本研究采网络多基站融合技术,结合基准站与线性内插模型算法,生成虚拟参考站伪距观测值,并将虚拟参考站作为基准站与目标进行伪距差分解算,从而解算高动态目标的位置轨迹。通过静态目标与高动态目标的实测数据验证,在有3个基准站的情况下,静态数据的定位精度达到0.399 m;而高动态目标在目标与基准站共视卫星个数不少于6颗的情况下,定位中误差不超过2.750 m;而与光学雷达、多测速雷达等其他外测设备的实测综合轨迹相比,两者之间位置差异的均方根值为6.390 m,基本满足高动态目标的定位需要。

关键词：网络伪距差分虚拟参考站技术弹道测量扩展卡尔曼滤波线性内插模型

“analog electronic circuits”and“digital electronic circuits”courses connected to practice teaching

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“analog electronic circuits”and“digital electronic circui...

教育部中南地区高等学校电子电气基础课教学研究会第二十届学术年会

作者： Cao Rui,Chen yan (zhengzhou Institute of Light Industry,zhengzhou 450002)

"analog electronic circuits"and"digital electronic circuits"are main courses of electronic engineering and communication *** the teaching process,theory and experimental courses are combined to stimulate students interested in learning,train students on knowledge acquisition, capability expansion and engineering designing,which is the authors’ teaching practice in recent years continuously.

关键词： engineering education training practice foundation course

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我国金融创新及其展望

金融理论与实践 2000年第10期 13-16页

作者：庞贞燕中国人民银行郑州中心支行河南郑州450002

我国金融创新存在两大问题。一是金融创新进展缓慢,产品的开发不能适应经济发展的需要。二是金融创新过分依赖于政府,金融机构缺乏创新的内在动力。应把经营性金融机构塑造成真正的市场主体,营造竞争性的市场金融环境,鼓励金融创新,防... 详细信息

我国金融创新存在两大问题。一是金融创新进展缓慢,产品的开发不能适应经济发展的需要。二是金融创新过分依赖于政府,金融机构缺乏创新的内在动力。应把经营性金融机构塑造成真正的市场主体,营造竞争性的市场金融环境,鼓励金融创新,防范金融风险,为金融创新培养优秀人才。

关键词：金融创新金融市场金融管理中国

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我国切花月季日光温室无土栽培的研究

商丘职业技术学院学报 2009年第5期8卷 102-104页

作者：贾雁郑州市绿化工程管理处河南郑州450000

用泥炭、珍珠岩、椰糠、蛭石和煤渣的不同配比在日光温室中栽培9种切花月季,结果表明:以BlackBeauty和Frisco品种的综合性状优良;以泥炭和1泥炭:1珍珠岩为栽培基质,切花品质表现最好.

关键词：切花月季日光温室栽培基质切花品质

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电子商务的法律适用探讨

商丘职业技术学院学报 2004年第5期3卷 29-30页

作者：马海燕郑州牧业工程高等专科学校经济贸易系河南郑州450011

市场经济是法制经济,电子商务是市场经济的一部分。建立健全电子商务法律是实现电子商务活动安全高效的必要保证。

关键词：电子商务电子合同法律适用支付制度《合同法》电子签名

Recent progress in diagnostic imaging and therapeutics of osteosarcoma based on multifunctional nanoparticles

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Science China Chemistry 2024年第9期67卷 2864-2889页

作者： Xueke yan Danmin Lin Dingyuan yan Dong Wang Huifang Su Department of Orthopaedic Surgery The First Affiliated Hospital of Zhengzhou UniversityZhengzhou 450052China Center for AIE Research College of Materials Science and EngineeringShenzhen UniversityShenzhen 518060China

Osteosarcoma is one of the most common primary bone malignancies,mainly occurring in children and *** diagnosis imaging methods for osteosarcoma contain X-ray,computed tomography and magnetic resonance imaging,and traditional therapy protocols are surgical resection and ***,these strategies are complicated and *** imaging methods,despite their maturity,have drawbacks that prevent them from showing more *** is more,the prognosis for patients with osteosarcoma remains unsatisfactory due to side effects of chemotherapy,as well as incomplete surgical removal of the *** compensate for the shortcomings of traditional imaging and treatment strategies for osteosarcoma,various types of nanoparticles have been designed and synthesized to selectively target osteosarcoma cells without toxic side effects on healthy *** the same time,these nanoparticle-based technologies can integrate the imaging and treatment of *** review summarizes the application of nanotechnology in the imaging and treatment of osteosarcoma in recent years,and finally discusses the challenges and development prospects,aiming to provide ideas for future research.

关键词： osteosarcoma nanotechnology imaging diagnosis therapy

Metal-organic framework-derived CoSe_(2)@N-doped carbon nanocubes for high-performance lithium-ion capacitors

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Rare Metals 2024年第5期43卷 2150-2160页

作者： Lei Wang Xiong Zhang yan-yan Kong Chen Li Ya-Bin An Xian-Zhong Sun Kai Wang yan-Wei Ma Institute of Electrical Engineering Chinese Academy of SciencesBeijing 100190China School of Engineering Sciences University of Chinese Academy of SciencesBeijing 100190China Institute of Electrical Engineering and Advanced Electromagnetic Drive Technology Qilu ZhongkeJinan 250013China School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001China

Cobalt selenide(CoSe_(2))has garnered considerable attention as a prospective anode candidate for advanced lithium-ion storage,prompting comprehensive ***,CoSe_(2)-based anodes usually suffer from significant volume variation upon lithiation leading to unsatisfactory cycling ***,a versatile synthesis route is proposed for the in-situ fabrication of CoSe2nanoparticles embedded in N-dope carbon skeleton(CoSe_(2)@NC)through annealing treatment and selenization of a metal–organic framework-derived(MOF)*** N-doped carbon derived from the MOF serves not only as an excellent conductive substrate but also as a confined reactor,effectively inhibiting the structural instability and alleviating the inevitable volume change of CoSe_(2).Owing to their unique nanostructure,the as-prepared CoSe_(2)@NC exhibits a high capacity of 745.9mAh·g^(-1)at 0.1 A·g^(-1),while maintaining excellent rate capability and an impressive ***,the assembled lithium-ion capacitor(LIC)based on CoSe_(2)@NC demonstrates an energy density of 130Wh·kg^(-1),a power density of 24.6 kW·kg^(-1),and remarkable capacity retention of 90.8%after 8000 *** results highlight the great potential of CoSe_(2)@NC for practical applications.

关键词： Lithium capacitors Cobalt selenide Metal-organic frameworks N-doped carbon

SEMI-IMPLICIT SPECTRAL DEFERRED CORRECTION METHODS BASED ON SECOND-ORDER TIME INTEGRATION SCHEMES FOR NONLINEAR PDES

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Journal of Computational Mathematics 2024年第1期42卷 111-133页

作者： Ruihan Guo yan Xu School of Mathematics and Statistics Zhengzhou UniversityZhengzhou 450001China School of Mathematical Sciences University of Science and Technology of ChinaHefei 230026China

In[20],a semi-implicit spectral deferred correction(SDC)method was proposed,which is efficient for highly nonlinear partial differential equations(PDEs).The semi-implicit SDC method in[20]is based on first-order time integration methods,which are corrected iteratively,with the order of accuracy increased by one for each additional *** this paper,we will develop a class of semi-implicit SDC methods,which are based on second-order time integration methods and the order of accuracy are increased by two for each additional *** spatial discretization,we employ the local discontinuous Galerkin(LDG)method to arrive at fully-discrete schemes,which are high-order accurate in both space and *** experiments are presented to demonstrate the accuracy,efficiency and robustness of the proposed semi-implicit SDC methods for solving complex nonlinear PDEs.

关键词： Spectral deferred correction method Nonlinear PDEs Local discontinuous Galerkin method Second-order scheme

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外部环境对我国独立董事制度影响分析

时代经贸(下旬刊) 2008年第12期 12-14页

作者：杜琰郑州轻工业学院经济与管理学院

对我国独立董事制度外部环境研究发现,在我国的法制、文化和市场环境中存在一些不利于独立董事发挥作用的因素,具体包括上市公司违规成本低,相当多中国人具有功利性强、讲面子、过度敬畏权力等特点,以及上市公司高度集中于国有股的股权... 详细信息

对我国独立董事制度外部环境研究发现,在我国的法制、文化和市场环境中存在一些不利于独立董事发挥作用的因素,具体包括上市公司违规成本低,相当多中国人具有功利性强、讲面子、过度敬畏权力等特点,以及上市公司高度集中于国有股的股权结构和市场体系不完善。

关键词：独立董事制度外部环境不利因素法制文化