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从运营角度探讨GEO卫星演进关键技术

无线电通信技术 2024年第3期50卷 422-426页

作者：冯建元李杰庞立新郭桦鹏城实验室广东深圳518052 亚太卫星宽带通信(深圳)有限公司广东深圳518038 国家能源集团航运公司北京100080

在卫星通信逐步转变为网络化运营的背景下,针对近年来低轨星座对同步静止轨道(Geostationary Orbit,GEO)卫星运营带来的挑战,提出了提高GEO卫星资源利用效率和降低通信成本的运营思路。在此基础上,结合卫星通信未来发展面对的时空变化... 详细信息

在卫星通信逐步转变为网络化运营的背景下,针对近年来低轨星座对同步静止轨道(Geostationary Orbit,GEO)卫星运营带来的挑战,提出了提高GEO卫星资源利用效率和降低通信成本的运营思路。在此基础上,结合卫星通信未来发展面对的时空变化的业务、高价值移动载体、天地协同泛在互联三类重要应用场景,根据各场景特点分析了GEO卫星提高服务性价比的关键技术,包括卫星灵活载荷技术和卫星与蜂窝网络融合技术,指出了这些技术的架构和功能要点,以及技术实施后对卫星资源利用的重要影响。

关键词：全灵活卫星星地融合卫星通信静止轨道卫星卫星运营

Physiological analysis reveals relatively higher salt tolerance in roots of Ilex integra than in those of Ilex purpurea

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Journal of Forestry Research 2022年第4期33卷 1187-1196页

作者： Yongfan Yu Min Zhang jianyuan feng Sujing Sun Peng Zhou Jiading Yang Co-Innovation Center for Sustainable Forestry in Southern China College of Biology and the EnvironmentNanjing Forestry UniversityNanjing 210037People’s Republic of China Jiangsu Academy of Forestry Nanjing 211153People’s Republic of China

Determining the responses of candidate plants to salt stress is a prerequisite for selecting and breeding suitable plants with high salt tolerance to grow in coastal mudfl at areas with high ***,2-year cutting seedlings of Ilex purpurea Hassk.(local species)and *** Thunb.(introduced species)were grown in pots in a glasshouse and irrigated with a Hoagland-NaCl solution at 0,24,and 48 *** samples were collected at 0,1,6,24,and 72 h,and concentration of Na^(+)ion;content of proline,soluble carbohydrate,malondialdehyde(MDA),H_(2)O_(2) and ascorbate;and activity of three key antioxidative enzymes were *** of *** accumulated relatively less Na^(+)and had less membrane lipid peroxidation and H_(2)O_(2) during salt stress,thus indicating a relatively higher salt tolerance than roots of *** for ascorbate content and antioxidant enzymatic activity suggest that the antioxidant ascorbate and antioxidative catalase may play substantial roles for scavenging reactive oxygen species in *** roots during salt ***,*** is apparently more suitable for growing in local highly saline coastal mudfl ats.

关键词： Salt tolerance Ilex purpurea Ilex integra Lipid peroxidation Na^(+)accumulation Antioxidant capacity

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面向卫星通导遥算融合的关键技术分析

天地一体化信息网络 2024年第3期5卷 11-20页

作者：李杰肖千里冯建元张程亚太卫星宽带通信(深圳)有限公司广东深圳518101 鹏城实验室广东深圳518052 中国空间技术研究院通信与导航卫星总体部北京100094

空天技术深入发展后,用户对空天系统的要求将是融合通信、遥感、导航卫星的天基信息服务系统,以向用户提供高速数据传输、直达用户的实时遥感服务、精确到厘米以内的高精度定位导航、分布式协同计算资源等服务能力,从而应用于丰富的服... 详细信息

空天技术深入发展后,用户对空天系统的要求将是融合通信、遥感、导航卫星的天基信息服务系统,以向用户提供高速数据传输、直达用户的实时遥感服务、精确到厘米以内的高精度定位导航、分布式协同计算资源等服务能力,从而应用于丰富的服务场景。现有的通信、导航、遥感卫星存在软件协议和物理设施上的屏障,不能融合应用,远远不能满足天基信息服务系统的建设要求,因此,有必要研究通信、导航、遥感、计算在卫星上的融合。融合关键点是硬件和软件资源的可调度、可共享,以及高效能、高稳定性的载荷器件。基于此,深入分析面向卫星通导遥算融合的关键技术,并分析通导遥算融合的典型应用服务方式,最后通过仿真实验可验证融合后的效能提升。

关键词：通导遥算融合灵活载荷天基信息服务系统卫星网络天基网络

渤海湾盆地大港探区明化镇组多级别层序格架及砂岩型铀成矿条件

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地质科技通报 2024年第5期43卷 1-17页

作者：宋舜尧王敏芳尚晓雨邹红丽陈俊林冯建园马忠梅花瑞李闯王翊超中国石油大港油田公司天津300280 中国地质大学(武汉) 武汉430074 中石化江苏油田分公司物探研究院南京210046

渤海湾盆地位于世界两大砂岩型铀矿成矿带之一的欧亚成矿带内,具有砂岩型铀成矿的潜力。大港探区测井结果显示明化镇组发育着大范围的高伽马异常,为探究其铀成矿条件并指明找矿方向,建立了大港探区明化镇组多级别层序格架,并开展了层序... 详细信息

渤海湾盆地位于世界两大砂岩型铀矿成矿带之一的欧亚成矿带内,具有砂岩型铀成矿的潜力。大港探区测井结果显示明化镇组发育着大范围的高伽马异常,为探究其铀成矿条件并指明找矿方向,建立了大港探区明化镇组多级别层序格架,并开展了层序内沉积微相研究,对氧化还原带进行了划分。研究表明,依据测井曲线特征和岩石性质,将明化镇组划分为五级层序,铀异常主要见于明化镇组下段上亚段和上段下亚段2个五级层序内。其沉积微相主要发育曲流河河道、边滩、溢岸沉积和泛滥平原4种,其中铀异常主要发育于边滩、河道砂体。2个层序内的氧化还原带可划分出氧化带、过渡带和还原带,其中铀异常主要位于过渡带内。叠合沉积微相、氧化还原带展布、铀异常展布和油气分布等特征,认为油气富集带附近的过渡带中,边滩和河道微相砂体中均具有良好的铀成矿条件。综合分析认为,港东港西地区西7-14-2、西1603、港3-6-20和港8-15-1井区是大港探区砂岩型铀矿的有利找矿位置,研究结果为渤海湾盆地砂岩型铀矿勘探提供了启示意义。

关键词：渤海湾盆地黄骅坳陷砂岩型铀矿层序地层成矿条件

Key exploration & development technologies and engineering practice of continental shale oil: A case study of Member 2 of Paleogene Kongdian Formation in Cangdong Sag, Bohai Bay Basin, East China

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Petroleum Exploration and Development 2020年第5期47卷 1138-1146页

作者： ZHOU Lihong ZHAO Xianzheng CHAI Gongquan JIANG Wenya PU Xiugang WANG Xiaodong HAN Wenzhong GUAN Quansheng feng jianyuan LIU Xuewei Dagang Oilfield of CNPC Tianjin 300280China

Based on detailed core description and systematic joint test data,enrichment laws of continental shale oil have been examined *** technologies such as the identification and quantitative evaluation method for sweet spot,precise design and tracking of horizontal well trajectory,and the low-cost horizontal well volume fracturing technology of the whole process"slick water+quartz sand"for continental shale oil have been *** research results show that the enrichment of pure continental shale oil of the Paleogene Kong 2 Member in Cangdong Sag is controlled by predominant fabric facies and cross-over effect of retained hydrocarbons jointly;and there are four modes of shale oil enrichment,*** felsic,laminar mixed,thin-layer limy dolomitic,and thick-layer limy dolomitic *** identification and evaluation method for shale oil sweet spots can predict sweet spots *** precise trajectory design for sweet spot layer and tracking-trajectory optimization while drilling by considering geological and engineering factors have been proved effective by field application,with drilling rate of sweet spots reaching 100%and drilling rate of type I sweet spots reaching over 75%.The whole process"slick water+quartz sand"low cost volume fracturing has been proved effective in creating multi-stage fracture network in the horizontal section,and improved productivity *** can lower the comprehensive engineering cost by 26.4%.

关键词： Bohai Bay Basin Cangdong Sag continental shale oil sweet spot identification horizontal well trajectory optimization fracturing

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CircPTEN-MT from PTEN regulates mitochondrial energy metabolism

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Journal of Genetics and Genomics 2024年第5期51卷 531-542页

作者： Danhui Ruan Jiancheng Xu Yang Liu Juan Luo Xuyang Zhao Yuhua Li Guangxi Wang Jiawen feng Hui Liang Yue Yin jianyuan Luo Yuxin Yin Institute of Systems Biomedicine Department of PathologySchool of Basic Medical SciencesBeijing Key Laboratory of Tumor Systems BiologyPeking University International Cancer InstitutePeking-Tsinghua Center of Life SciencesPeking University Health Science CenterBeijing 100191China Institute of Precision Medicine Peking University Shenzhen HospitalShenzhenGuangdong 518036China Department of Pharmacology School of Basic Medical SciencesPeking University Health Science CenterBeijing 100191China Department of Medical Genetics Center for Medical GeneticsSchool of Basic Medical SciencesPeking University Health Science CenterBeijing 100191China Soochow University Cancer Institute SuzhouJiangsu 215127China

Phosphatase and tensin homolog(PTEN)is a multifunctional gene involved in a variety of physiological and pathological *** RNAs(circRNAs)are generated from back-splicing events during mRNA processing and participate in cell biological processes through binding to RNAs or ***,PTEN-related circRNAs are largely ***,we report that circPTEN-mitochondria(MT)(hsa_circ_0002934)is a circular RNA encoded by exons 3,4,and 5 of PTEN and is a critical regulator of mitochondrial energy ***-MT is localized to mitochondria and physically associated with leucine-rich pentatricopeptide repeat-containing protein(LRPPRC),which regulates posttranscriptional gene expression in *** down circPTEN-MT reduces the interaction of LRPPRC and steroid receptor RNA activator(SRA)stem-loop interacting RNA binding protein(SLIRP)and inhibits the polyadenylation of mitochondrial mRNA,which decreases the mRNA level of the mitochondrial complex I subunit and reduces mitochondrial membrane potential and adenosine triphosphate *** data demonstrate that circPTEN-MT is an important regulator of cellular energy *** study expands our understanding of the role of PTEN,which produces both linear and circular RNAs with different and independent functions.

关键词： Circular RNA LRPPRC Mitochondrial energy metabolism mtDNA post-transcriptional regulation

Structure-preserving algorithms for guiding center dynamics based on the slow manifold of classical Pauli particle

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Plasma Science and Technology 2024年第6期26卷 88-102页

作者：张若涵王正汹肖建元王丰 Key Laboratory of Materials Modification by Laser Ion and Electron BeamsSchool of PhysicsDalian University of TechnologyDalian 116024People’s Republic of China Department of Plasma Physics and Fusion Engineering University of Science and Technology of ChinaHefei 230026People’s Republic of China

The classical Pauli particle(CPP) serves as a slow manifold, substituting the conventional guiding center dynamics. Based on the CPP, we utilize the averaged vector field(AVF) method in the computations of drift orbits. Demonstrating significantly higher efficiency, this advanced method is capable of accomplishing the simulation in less than one-third of the time of directly computing the guiding center motion. In contrast to the CPP-based Boris algorithm, this approach inherits the advantages of the AVF method, yielding stable trajectories even achieved with a tenfold time step and reducing the energy error by two orders of magnitude. By comparing these two CPP algorithms with the traditional RK4 method, the numerical results indicate a remarkable performance in terms of both the computational efficiency and error elimination. Moreover, we verify the properties of slow manifold integrators and successfully observe the bounce on both sides of the limiting slow manifold with deliberately chosen perturbed initial conditions. To evaluate the practical value of the methods, we conduct simulations in non-axisymmetric perturbation magnetic fields as part of the experiments,demonstrating that our CPP-based AVF method can handle simulations under complex magnetic field configurations with high accuracy, which the CPP-based Boris algorithm lacks. Through numerical experiments, we demonstrate that the CPP can replace guiding center dynamics in using energy-preserving algorithms for computations, providing a new, efficient, as well as stable approach for applying structure-preserving algorithms in plasma simulations.

关键词： structure-preserving algorithm averaged vector field classical Pauli particle guiding center dynamics

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我国区域高技术产业R&D效率与模式分析

科技进步与对策 2012年第21期29卷 35-39页

作者：冯建元史丽萍哈尔滨工程大学经济管理学院黑龙江哈尔滨150001 哈尔滨商业大学轻工学院黑龙江哈尔滨150028

首先,采用DEA的CCR模型对我国内地30个省级区域高技术产业的R&D效率进行测度。其次,运用TOPSIS方法对相对有效的多个地区进行全排序,分析和比较了无效地区高技术产业R&D投入指标的利用率。然后,从R&D效率值和R&D投入均值两个维度将内地3... 详细信息

首先,采用DEA的CCR模型对我国内地30个省级区域高技术产业的R&D效率进行测度。其次,运用TOPSIS方法对相对有效的多个地区进行全排序,分析和比较了无效地区高技术产业R&D投入指标的利用率。然后,从R&D效率值和R&D投入均值两个维度将内地30个地区的高技术产业R&D模式分为4类,并提出了相应对策。

关键词：高技术产业 R&D效率 R&D模式

基于社会网络分析的显性知识转移网络特征研究——以哈尔滨市50家典型机构为例

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情报杂志 2011年第11期30卷 105-109页

作者：冯建元史丽萍哈尔滨工程大学经济管理学院哈尔滨150001 哈尔滨商业大学轻工学院哈尔滨150028

基于网络信息检索对哈尔滨市区域创新系统内部代表性强的8家高校、10家科研院所和32家企业所组成知识转移网络进行分析,运用Ucinet软件绘制了显性知识转移网络图,研究了各产业领域知识转移网络的密度和机构网络节点中心度等网络要素,发... 详细信息

基于网络信息检索对哈尔滨市区域创新系统内部代表性强的8家高校、10家科研院所和32家企业所组成知识转移网络进行分析,运用Ucinet软件绘制了显性知识转移网络图,研究了各产业领域知识转移网络的密度和机构网络节点中心度等网络要素,发现交通运输产业领域、农\林\食品产业领域、电子通信\电气产业领域知识转移网络较为发达,知识转移能力较强,揭示通过培育高校、研究所以及大型企业哈电集团、生产配件型企业爱迪压铸等中介性较强的机构可以有效加快与优化哈尔滨市区域创新系统内部的知识转移。

关键词：区域创新系统社会网络分析法知识转移网络