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Regulation mechanism for the formation and microwave absorbing performance of CNT/CoFe-MOF derived hierarchical composite

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International Journal of Smart and Nano Materials 2022年第2期13卷 273-292页

作者： Jinxiao Wang jianfeng yang Jun yang State Key Laboratory for Mechanical Behavior of Materials Xi’an Jiaotong UniversityXi’anP.RChina School of Metallurgical Engineering Xi’an University of Architecture and TechnologyXi’anP.RChina

The structure design,performance analysis,and process optimization of CNT/MOF-derived hierarchical composite play an important role in the development of high-performance microwave absorbing ***,the preparation,morphology evolution,and electromag-netic wave absorption mechanism of CNT/MOF-derived hierarchical composite were systematically *** regulation mechan-ism was revealed by studying the changes in the morphological characteristics,electromagnetic properties,and microwave absorbing performance of CNT/MOF-derived hierarchical composite under differ-ent process *** results show that the morphological characteristics and interface bonding between CNT and MOF have a great impact on the absorptive *** composite with com-position of 0.28Co/0.26Fe has a maximum absorption of−46 dB at 8.6 GHz and a thickness of 4 *** addition,the absorption band with reflection loss values of less than−20 dB can be operated with this thickness between 7.15 and 10.18 GHz,showing excellent absorbing ability and electromagnetic wave *** regulation mechan-ism of CNT/MOF-derived hierarchical composite mainly depends on the effect of Lorentz force,the ion disorder of CoO-Fe_(2)O_(3) heterojunc-tion,and the spin polarization mechanism of free *** study further improves the corresponding theoretical basis and new design principles,which provides technical support for the development of high-performance absorbing materials.

关键词： Regulation mechanism heat treatment process homogeneous distribution bonding modes

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月面巡视器附近月尘静电迁移特性的数值模拟

宇航学报 2024年第4期45卷 613-624页

作者：钱啸宇张易阳方筑杨剑锋方延玮李水清清华大学能源与动力工程系北京100084 清华大学核能与新能源技术研究院北京100084 上海宇航系统工程研究所上海201109

针对月尘在月面巡视器附近的鞘层内的迁移和在设备表面的沉积过程开展数值模拟研究。首先,基于质点网格方法获得了巡视器附近的月表鞘层电场分布。在此基础上,分别探究了月表扬起月尘和静电悬浮月尘在鞘层电场内的迁移和在巡视器表面的... 详细信息

针对月尘在月面巡视器附近的鞘层内的迁移和在设备表面的沉积过程开展数值模拟研究。首先,基于质点网格方法获得了巡视器附近的月表鞘层电场分布。在此基础上,分别探究了月表扬起月尘和静电悬浮月尘在鞘层电场内的迁移和在巡视器表面的沉积。研究表明,巡视器对鞘层电场的扰动作用增强了附近的电场,促进了月尘扬起和向巡视器表面的迁移沉积。当太阳天顶角较小或适中时,月尘只有达到临界行驶速度才能迁移至巡视器表面。

关键词：数值模拟质点网格法鞘层电场静电扬起静电迁移

单人经口胆道镜与射频消融术同台诊治不可切除肝外胆管癌的可行性与安全性研究

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中华消化内镜杂志 2024年第3期41卷 204-211页

作者：乐宸妤顾伟刚杨晶金杭斌张筱凤杨建锋浙江中医药大学第四临床医学院杭州310053 西湖大学医学院附属杭州市第一人民医院消化内科、浙江省中西医结合胆胰疾病重点实验室、杭州市消化疾病研究所、浙江省临床肿瘤毒理药理重点实验室杭州310006

目的探讨单人经口胆道镜联合射频消融术(radiofrequency ablation,RFA)同台诊治不可切除肝外胆管癌的可行性和安全性。方法回顾2013年1月至2022年1月期间在杭州市第一人民医院治疗的90例可疑肝外胆管癌患者资料,根据诊治过程最终纳入69... 详细信息

目的探讨单人经口胆道镜联合射频消融术(radiofrequency ablation,RFA)同台诊治不可切除肝外胆管癌的可行性和安全性。方法回顾2013年1月至2022年1月期间在杭州市第一人民医院治疗的90例可疑肝外胆管癌患者资料,根据诊治过程最终纳入69例,分为常规分次组(n=34):先经内镜逆行胰胆管造影术(endoscopic retrograde cholangiopancreatography,ERCP)+细胞刷或单人经口胆道镜检查取得活检组织,待获得阳性病理结果再次行ERCP+RFA;同台诊治组(n=35):行ERCP经单人经口胆道镜检查胆道并对病灶行直视下活检,对术中快速病理结果确定为恶性肿瘤的患者同台行RFA。对比两组操作成功率、术后胆红素恢复情况、ERCP次数、术后不良事件发生率、住院时间及费用。结果两组患者均成功完成内镜下RFA,操作成功率100.0%(69/69)。分次组和同台组总胆红素术后下降50%及以上的患者比例差异无统计学意义[52.94%(18/34)比57.14%(20/35),χ^(2)=0.27,P=0.604]。分次组ERCP次数明显多于同台组[(2.59±0.50)次/人比(1.00±0.00)次/人],差异有统计学意义(t=3.13,P=0.002)。分次组和同台组术后总体不良事件发生率差异无统计学意义[67.65%(23/34)比65.71%(23/35),χ^(2)=2.83,P=0.626]。分次组住院时间明显长于同台组,差异有统计学意义[(17.41±9.13)d比(7.91±3.48)d,t=5.32,P=0.001]。分次组住院费用明显多于同台组,差异有统计学意义[(37127.88±3763.77)元比(23980.69±4767.15)元,t=6.61,P=0.001]。结论单人经口胆道镜直视下诊断+活检联合RFA同台诊治不可切除肝外胆管癌可减少ERCP次数,并且不增加术后不良事件发生率,是一种安全有效且具有较高成本-效益比的诊治方法。

关键词：胆管肿瘤肝外胆管癌单人经口胆道镜射频消融术内窥镜检查

加工需求驱动下词汇阅读神经通路的动态协作机制

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心理科学进展 2024年第1期32卷 118-130页

作者：党敏蔡文琦陈发坤王小娟杨剑峰陕西师范大学心理学院西安710062

建构统一的认知和神经生理模型是词汇阅读认知神经科学研究面临的核心问题。阅读的认知理论模型一致认为阅读是语音和语义加工通路分工协作的结果,认知神经科学研究也表明词汇阅读是背侧和腹侧神经通路动态协作的结果。为了系统地阐述... 详细信息

建构统一的认知和神经生理模型是词汇阅读认知神经科学研究面临的核心问题。阅读的认知理论模型一致认为阅读是语音和语义加工通路分工协作的结果,认知神经科学研究也表明词汇阅读是背侧和腹侧神经通路动态协作的结果。为了系统地阐述阅读网络的这种动态协作机制,结合神经功能和生理基础两个层面,从以下三个方面对最新研究进展进行系统疏理:首先,指出潜在的加工需求是背/腹侧神经通路动态协作的实质;然后进一步阐明潜在加工需求驱动了不同正字法深度下背/腹侧神经通路的分工合作模式;最后,深入剖析了潜在加工如何通过语言经验塑造了神经通路间的动态协作。从而揭示出阅读神经通路动态协作的实质可能是特定任务下加工需求驱动的结果,这种动态协作可能成为跨语言普遍的词汇阅读理论模型。

关键词：词汇阅读模型通路动态协作

支撑多微网端对端交易的配电系统协同优化调度模型

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电力系统及其自动化学报 2024年第6期36卷 92-100页

作者：杨剑峰章剑光陈晓宇沈鉴国网绍兴供电公司经济技术研究所绍兴312000

端对端交易是解决多微网协同控制的有效手段,但其对配电系统运行的影响应予以充分考虑。为此,本文提出一种支撑多微网端对端交易的配电系统协同优化调度模型。各微网基于双向拍卖机制,形成经济性最优的交易计划并上报配电运营商。配电... 详细信息

端对端交易是解决多微网协同控制的有效手段,但其对配电系统运行的影响应予以充分考虑。为此,本文提出一种支撑多微网端对端交易的配电系统协同优化调度模型。各微网基于双向拍卖机制,形成经济性最优的交易计划并上报配电运营商。配电运营商基于上传的交易计划进行优化调控,并将其影响以交易服务费的形式传递回微网。通过两层间的迭代实现配电系统和微网的协同优化运行。经算例验证表明,本文所提模型可在均衡考虑双方利益诉求的前提下有效降低微网用电成本。

关键词：配电系统多微网优化调度端对端交易

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Individual Word Length Patterns for Fractional Factorial(Split-Plot)Designs

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Journal of Systems Science & Complexity 2023年第5期36卷 2082-2099页

作者： HAN Xiaoxue CHEN Jianbin yang jianfeng LIU Minqian School of Statistics and Data Science Qufu Normal UniversityQufu 273165China School of Mathematics and Statistics Beijing Institute of TechnologyBeijing 100081China School of Statistics and Data Science LPMC&KLMDASRNankai UniversityTianjin 300071China

Fractional factorial(FF)designs are commonly used for factorial experiments in many *** some prior knowledge has shown that some factors are more likely to be significant than others,Li,et al.(2015)proposed a new pattern,called the individual word length pattern(IWLP),which,defined on a column of the design matrix,measures the aliasing of the effect assigned to this column and effects involving other *** this paper,the authors first investigate the relationships between the IWLP and other popular criteria for regular FF *** we know,fractional factorial split-plot(FFSP)designs are important both in theory and *** another contribution of this paper is extending the IWLP criterion from FF designs to FFSP *** authors propose the IWLP of a factor from the whole-plot(WP),or sub-plot(SP),denoted by the I_w WLP and Is WLP respectively,in the FFSP *** authors further propose combined word length patterns C_(w) WLP and Cs WLP,in order to select good designs for different *** new criteria C_(w) WLP and Cs WLP apply to the situations that the potential important factors are in WP or SP,*** examples are presented to illustrate the selected designs based on the criteria established here.

关键词： Effect hierarchy fractional factorial split-plot prior information regular design

2023年我国非油气地质勘查形势分析与展望

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中国矿业 2024年第6期33卷 45-52页

作者：马腾杨建锋张翠光左力艳中国地质调查局发展研究中心北京100037

本文基于“全国地质勘查成果直报系统”数据,汇总统计了2006—2023年我国非油气地质勘查投入变化情况,分析了2023年我国非油气地质勘查形势的主要特点,展望了2024年我国非油气地质勘查形势。2023年,我国非油气地质勘查投入200.72亿元,... 详细信息

本文基于“全国地质勘查成果直报系统”数据,汇总统计了2006—2023年我国非油气地质勘查投入变化情况,分析了2023年我国非油气地质勘查形势的主要特点,展望了2024年我国非油气地质勘查形势。2023年,我国非油气地质勘查投入200.72亿元,同比增长7.7%,连续三年实现正增长。非油气地质勘查投入专业结构持续调整,地质勘查投入重心向西部地区转移,非油气矿产勘查投入占比持续增加。2023年,全球大宗金属矿产品价格高位震荡下行,全球非油气矿产勘查投入同比减少2.5%,而我国非油气矿产勘查投入逆势同比增长18.5%,主要原因是受我国矿业政策环境持续改善和登记探矿权数量、面积增加等积极因素影响。展望2024年,全国非油气地质勘查投入将保持稳中有升的发展态势,预计同比增长10%左右。

关键词：非油气地质勘查矿产勘查勘查投入勘查形势

Space advanced technology demonstration satellite

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Science China(Technological Sciences) 2024年第1期67卷 240-258页

作者： ZHANG XiaoFeng CHEN Wen ZHU XiaoCheng MENG Na HE JunWang BI XingZi ZHANG YongHe SHI Qi LI Fei LIU Rui FENG ZhengGong LIU Liu LI JinSong WU HaiChen XU DongXiao LI TaiJie HUANG JiangJiang LIU Shuo LI TianTong YU XianSheng GAO yang ZHOU Heng BAN HanYu ZHANG YanLi ZHANG YueTing yang YingQuan HE Tao DUAN XuLiang CHEN Xin WANG YaMin SUN AnTai ZHANG KuoXiang SUN Ying WANG YaoBin FAN ChengCheng XIONG ShaoLin LI XinQiao WEN Xiangyang LING ZhiXing SUN XiaoJin ZHANG Chen BAI XianYong WANG ZhanShan DENG YuanYong TIAN Hui yang jianfeng XUE HongBo SANG Peng LIU JinGuo ZHENG HuiLong ZHU Xiang HE JianWu LI Hui XU LuXiang XU ShuYan CHEN WenWu LIU ZhenDong WANG ZhaoLi MAO XiangLong GAO Rong LI ZongXuan DING GuoPeng WANG XinYu DOU RunJiang WENG LuBin LUO Hao WANG YaPing LIANG XianFeng FANG ZiRuo Innovation Academy for Microsatellites Chinese Academy of SciencesShanghai 201203China Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China National Astronomical Observatory of China Beijing 100101China Shanghai Institute of Technical Physics Chinese Academy of SciencesShanghai 200083China Institute of Precision Optical Engineering School of Physics Science and EngineeringTongji UniversityShanghai 200092China School of Earth and Space Sciences Peking UniversityBeijing 100871China Xi’an Institute of Optics and Precision Mechanics Chinese Academy of SciencesXi’an 710119China National Space Science Center Chinese Academy of SciencesBeijing 100190China Shenyang Institute of Automation Chinese Academy of SciencesShenyang 110016China Institute of Engineering Thermophysics Chinese Academy of SciencesBeijing 100190China Institute of Mechanics Chinese Academy of SciencesBeijing 100190China Shanghai Institute of Organic Chemistry Chinese Academy of SciencesShanghai 200032China Hangzhou Institute for Advanced Study University of Chinese Academy of SciencesHangzhou 310024China Nanyang Technological University Singapore 569830Singapore Dalian Institute of Chemical Physics Chinese Academy of SciencesDalian 116023China Technical Institute of Physics and Chemistry Chinese Academy of SciencesBeijing 100049China Changchun Institute of Optics Fine Mechanics and PhysicsChinese Academy of SciencesChangchun 130033China Institute of Semiconductors Chinese Academy of SciencesBeijing 100083China Institute of Automation Chinese Academy of SciencesBeijing 100190China School of Aeronautics and Astronautics Zhejiang UniversityHangzhou 310058China

The Space Advanced Technology demonstration satellite(SATech-01),a mission for low-cost space science and new technology experiments,organized by Chinese Academy of Sciences(CAS),was successfully launched into a Sun-synchronous orbit at an altitude of~500 km on July 27,2022,from the Jiuquan Satellite Launch *** as an experimental platform for space science exploration and the demonstration of advanced common technologies in orbit,SATech-01 is equipped with 16 experimental payloads,including the solar upper transition region imager(SUTRI),the lobster eye imager for astronomy(LEIA),the high energy burst searcher(HEBS),and a High Precision Magnetic Field Measurement System based on a CPT Magnetometer(CPT).It also incorporates an imager with freeform optics,an integrated thermal imaging sensor,and a multi-functional integrated imager,*** paper provides an overview of SATech-01,including a technical description of the satellite and its scientific payloads,along with their on-orbit performance.

关键词： SATech-01 spacecraft design scientific instruments on-orbit performance

Numerical modeling of metamorphic core complex formation:Implications for the destruction of the North China Craton

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Earth and Planetary Physics 2022年第2期6卷 191-203页

作者： ZiQi Ma Gang Lu jianfeng yang Liang Zhao State Key Laboratory of Lithospheric Evolution Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China College of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijing 100049China

Widespread magmatism, metamorphic core complexes(MCCs), and significant lithospheric thinning occurred during the Mesozoic in the North China Craton(NCC). It has been suggested that the coeval exhumation of MCCs with uniform northwest-southeast shear senses and magmatism probably resulted from a decratonization event during the retreat of the paleo-Pacific Plate. Here we used two-dimensional finite element thermomechanical numerical models to investigate critical parameters controlling the formation of MCCs under far-field extensional stress. We observed three end-member deformation modes: the MCC mode, the symmetric-dome mode, and the pure-shear mode. The MCC mode requires a Moho temperature of ≥700 ℃ and an extensional strain rate of ≥5 × 10^(-16)s^(-1), implying that the lithosphere had already thinned when the MCC was formed in the Mesozoic. Considering that the widespread MCCs have the same northwest-southeast extension direction in the NCC, we suggest that the MCCs are surface expressions of both large-scale extension and craton destruction and that rollback of the paleo-Pacific slab might be the common driving force.

关键词： metamorphic core complex North China Craton numerical modeling extension