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The FRB-searching Pipeline of the Tianlai Cylinder Pathfinder Array

Research in Astronomy and Astrophysics 2024年第8期24卷 113-132页

作者： Zijie Yu Furen Deng Shijie Sun Chenhui Niu Jixia Li Fengquan Wu Wei-Yang Wang Yougang Wang Shifan Zuo Lin Shu Jie Hao Xiaohui Liu Reza Ansari Ue-Li pen Albert Stebbins Peter Timbie Xuelei Chen National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China University of Chinese Academy of Sciences Beijing 100049China Key Laboratory of Radio Astronomy and Technology Chinese Academy of ScienceBeijing 100101China Institute of Astrophysics Central China Normal UniversityWuhan 430079China Institute of Automation Chinese Academy of SciencesBeijing 100190China Guangdong Institute of Artificial Intelligence and Advanced Computing Guangzhou 510535China UniversitéParis-Saclay CNRS/IN2P3IJCLab91405 OrsayFrance Institute of Astronomy and Astrophysics Academia SinicaRoosevelt RoadTaipei 10617TaiwanChina Canadian Institute for Theoretical Astrophysics University of Toronto60 Saint George StreetTorontoON M5S 3H8Canada Department of Physics University of Wisconsin-MadisonMadisonWI 53706USA Fermi National Accelerator Laboratory P.O.Box 500Batavia IL 60510-5011USA Department of Physics College of SciencesNortheastern UniversityShenyang 110819China Center of High Energy Physics Peking UniversityBeijing 100871China

This paper presents the design,calibration,and survey strategy of the Fast Radio Burst(FRB)digital backend and its real-time data processing pipeline employed in the Tianlai Cylinder Pathfinder *** array,consisting of three parallel cylindrical reflectors and equipped with 96 dual-polarization feeds,is a radio interferometer array designed for conducting drift scans of the northern celestial *** FRB digital backend enables the formation of 96 digital beams,effectively covering an area of approximately 40 square degrees with the 3 dB *** pipeline demonstrates the capability to conduct an automatic search of FRBs,detecting at quasi-realtime and classifying FRB candidates *** current FRB searching pipeline has an overall recall rate of88%.During the commissioning phase,we successfully detected signals emitted by four well-known pulsars:PSR B0329+54,B2021+51,B0823+26,and B2020+*** report the first discovery of an FRB by our array,designated as FRB *** also investigate the optimal arrangement for the digitally formed beams to achieve maximum detection rate by numerical simulation.

关键词： instrumentation interferometers-methods data analysis-(stars )pulsars general-telescopes

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财政风险补偿与知识产权质押融资——政策、机制与评估

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世界经济文汇 2024年第1期37卷 105-120页

作者：韩庆潇亓鹏中国人民银行山东省分行 250021 中国人民银行莱芜分行

本文通过构建包含金融摩擦的银企关系模型,分析了知识产权质押融资风险补偿机制的作用机理,并运用多期的双重差分模型验证了其作用效果。研究发现,高风险与轻资产的特征皆是科技型企业融资困境产生的重要原因,且前者的不利影响更加明显... 详细信息

本文通过构建包含金融摩擦的银企关系模型,分析了知识产权质押融资风险补偿机制的作用机理,并运用多期的双重差分模型验证了其作用效果。研究发现,高风险与轻资产的特征皆是科技型企业融资困境产生的重要原因,且前者的不利影响更加明显;风险补偿机制能够以财政资金分担部分风险,有效缓解科技型企业贷款高风险问题,从而显著提升了知识产权质押融资水平,表现为贷款规模和占比的明显增加;大中型银行以及企业创新水平较高地区具备开展知识产权质押融资业务的良好基础,因此进一步强化了风险补偿机制的作用效果。

关键词：知识产权质押融资风险补偿基金科技型企业

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2024年全国笔类文具产品质量检验检测合格名单（第一季度）

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中国制笔 2024年第2期 66-69页

作者： National Light Industry Fountain pen Ballpoint pen Quality Supervision and Testing Center 全国轻工业自来水笔圆珠笔质量监督检测中心

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2024年全国笔类文具产品质量检验检测合格名单（第二季度）

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中国制笔 2024年第3期 64-67页

作者： National Light Industry Fountain pen Ballpoint pen Quality Supervision and Testing Center 全国轻工业自来水笔圆珠笔质量监督检测中心

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基于自适应启发PSO的零件在线智能定位

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清华大学学报（自然科学版） 2024年第8期64卷 1367-1379页

作者：刘华森郭子豪聂海平彭志军航空工业成都飞机工业(集团)有限责任公司成都610092 清华大学天津高端装备研究院天津300300

工业流水线生产环境下,多种类小批次中小型航空零件在自动化喷涂作业等过程中,往往面临着零件摆放位姿不固定而难以自动化测量与定位的问题。为实现综合满足喷涂效率与精度的零件定位,应用基于自适应启发改进的粒子群算法,随配准情况自... 详细信息

工业流水线生产环境下,多种类小批次中小型航空零件在自动化喷涂作业等过程中,往往面临着零件摆放位姿不固定而难以自动化测量与定位的问题。为实现综合满足喷涂效率与精度的零件定位,应用基于自适应启发改进的粒子群算法,随配准情况自适应地采用不同启发方案与尺度,实现了较强后景影响下快速地点云配准。从全局搜索与局部搜索两方面进行优化,在应用随配准状态自适应的学习系数与惯性系数基础上,引入自适应尺度的滞步系数与类梯度下降运算,解决粒子群算法收敛速度缓慢与易陷入局部最优问题。基于正态分布置信度准则剔除适应度离群值降低后景点云对配准的影响,实现分割后点云与理论数模的智能配准,获得零件摆放的精确位姿。应用二维(2D)视觉减少测量时间、提供点云分割的依据,并多线程并发同步运算提高效率。最终实现了在3 min的节拍内完成三维(3D)点云的自动化扫描,以及在平均2.5 min节拍内实现2 mm精度的多种零件自主配准定位。

关键词：点云配准粒子群算法自适应启发自动化定位 2D-3D视觉融合

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Plant essential oils combined with organic acids restored lipopolysaccharide-induced leaky intestine via gut microbial modulation in weaned piglets

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Animal Nutrition 2024年第3期18卷 419-432页

作者： Xiaoyu Zheng Yibo Wang Xuemei Zhou Tanyi Deng Yueqi Zhao Zhichao Fu Yulong Wei wen Ma Shihai Zhang Wutai Guan fang Chen State Key Laboratory of Swine and Poultry Breeding Industry College of Animal ScienceSouth China Agricultural UniversityGuangzhou 510642China Guangdong Laboratory for Lingnan Modern Agriculture South China Agricultural UniversityGuangzhou 510642China College of Animal Science and National Engineering Research Center for Breeding Swine Industry South China Agricultural UniversityGuangzhou 510642China

Intestine derived lipopolysaccharide(LPS)is closely related to systemic inflammation and disorders,yet little is known about its roles in the weanling stress of piglets and its potential as a nutritional intervention *** study aimed to investigate the potential of essential oils(EO)and organic acids(OA)in mitigating weaning stress in piglets by modulating the circulation of intestine derived ***-two weaned piglets at 21 d old with body weight of 8.12±0.168 kg were randomly divided into a control group(CON)and an experimental group,each consisting of six pens with six piglets per pen,and were fed either a basal diet or a basal diet supplemented with 3 kg/t OA+500 g/t EO(EO+OA).On the 14th day of the feeding trial,12 weaned piglets were randomly selected from the CON group,and 6 piglets were selected from the experimental *** on diet composition and stress treatment,these 18 piglets were divided into the following three groups:1)CON *** were fed a basal diet and received an intraperitoneal injection of saline as a control.2)LPS *** were fed a basal diet and received an intraperitoneal injection of LPS(100μg/kg body weight)to induce stress.3)EO+OA+LPS *** were fed a basal diet supplemented with EO and OA and received an intraperitoneal injection of LPS(100μg/kg body weight)to induce *** results showed that EO+OA significantly ameliorated the oxidative imbalance and inflammation disorder induced by LPS in piglets'serum and intestine by inhibiting the activation of the Toll-like receptor 4(TLR4)/nuclear factor-kappa B(NF-κB)/mitogen-activated protein kinase(MAPK)signaling ***,compared to the LPS group,supplementation with EO+OA restored LPS-induced reductions in Bcl-2 protein expression in the piglets'intestines(P<0.05)and mitigated morphological damage;it also enhanced both the protein expression and relative gene expression of the tight junction proteins occludin and claudin-1(P<0.05),and redu

关键词： Weaned piglet Essential oil Organic acid Gut microbiota Lipopolysaccharide

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气动激励下的涡轮增压器整机振动分析与试验

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内燃机学报 2024年第2期42卷 161-168页

作者：秦励伟刘贵升盆义红刘海景国玺张昊河北工业大学机械工程学院天津300130 天津市新能源汽车动力传动与安全技术重点实验室天津300130 中国北方发动机研究所柴油机增压技术重点实验室天津300400

针对气动激励引起的增压器整机高振动响应问题,以某型柴油发动机涡轮增压器为研究对象,采用单向瞬态流固耦合方法,建立涡轮增压器整机流固耦合模型,开展气动激励下关键零部件振动响应研究.讨论并对比了涡轮及压气机叶轮气动激励的时域... 详细信息

针对气动激励引起的增压器整机高振动响应问题,以某型柴油发动机涡轮增压器为研究对象,采用单向瞬态流固耦合方法,建立涡轮增压器整机流固耦合模型,开展气动激励下关键零部件振动响应研究.讨论并对比了涡轮及压气机叶轮气动激励的时域和频域特性,并定量分析了该激励下的结构振动响应特性,同时通过增压器振动试验验证了模型及方法的精度,各工况下壳体振动加速度量级的绝对误差不超过6 dB,相对误差不超过4%.结果表明:在转子系统中,压气机叶轮压力波动幅值为涡轮机涡轮的4倍,由此导致压气机叶轮的振动幅值平均为涡轮和转轴的3~4倍,最大振动幅值发生在压气机叶轮轮盘外边缘叶顶间隙处,为209.5μm;壳体振动烈度最大的部位发生在压气机出口内壁靠近轴承体一侧,为322.2 m/s^(2).

关键词：涡轮增压器气动激励流固耦合数值模拟

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Innovative coaxial high-temperature thin-film sensor with core-shell structure surpassing traditional multilayer films

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Rare Metals 2024年第8期43卷 3854-3867页

作者： Chao Wu Guo-Chun Chen Fu-Xin Zhao fan Lin Ying-Jun Zeng Yan-Zhang Fu Yan-Song Zhang Li-Da Xu Qin-Nan Chen Rui Tang Dao-Heng Sun Zhen-Yin Hai pen-Tung Sah Institute of Micro-Nano Science and Technology Xiamen UniversityXiamen 361005China AECC Shenyang Engine Institute Shenyang 110015China School of Aerospace Engineering Xiamen UniversityXiamen 361005China

High-temperature thin-film sensors(TFSs)often suffer from inadequate tolerance to elevated *** this study,an innovative approach is presented to fabricate in situ integrated TFSs with a core-shell structure on alloy components using coaxial multi-ink printing *** method replaces traditional layerby-layer(LbL) deposition and LbL sintering processes and achieves simplified one-step *** coaxial TFS includes a conductive Pt core for conducting and sensing and a dielectric shell for electrical isolation and high-temperature *** coaxial Pt resistance grid demonstrates excellent high-temperature stability,with a resistance drift rate of only 0.08%·h^(-1) at 800 ℃,significantly lower than traditional Pt *** employing this method,a Pt thin-film strain gauge(TFSG) is fabricated that boasts remarkable high-temperature electromechanical *** effectively addresses the problem of sensitivity degradation experienced by traditional LbL Pt TFSGs when subjected to high *** demonstrate the system integration potential of the technique by printing and verifying the functionality of a long-path thinfilm resistance grid on turbine blades,which can withstand butane flame up to ~1300℃.These results showcase the potential of core-shell structure of the coaxial TFS for high-temperature applications,providing a novel approach to develop high-performance TFS beyond traditional multilayer structure.

关键词： Coaxial printing Core-shell structure Thinfilm strain gauge High-temperature stability

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基于深度强化学习的园区综合能源系统低碳经济调度

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电网技术 2024年第9期48卷 3604-3613,I0022,I0023页

作者：杨挺刘豪王静党兆帅耿毅男盆海波智能电网教育部重点实验室(天津大学) 天津市南开区300072 深圳供电局有限公司广东省深圳市518000

为降低园区综合能源系统的运行成本和碳排放量,同时应对系统不确定性带来的随机波动,提出一种考虑阶梯式碳交易的园区综合能源系统低碳经济调度模型,并采用深度强化学习方法求解。首先构建园区阶梯式碳交易模型,将碳交易成本考虑在内对... 详细信息

为降低园区综合能源系统的运行成本和碳排放量,同时应对系统不确定性带来的随机波动,提出一种考虑阶梯式碳交易的园区综合能源系统低碳经济调度模型,并采用深度强化学习方法求解。首先构建园区阶梯式碳交易模型,将碳交易成本考虑在内对园区综合能源系统低碳经济调度问题进行数学描述;其次将该调度问题表述为马尔可夫决策过程框架,定义系统的观测状态、调度动作和奖励函数;继而采用近端策略优化算法进行低碳经济调度决策。所提方法无需进行负荷预测或不确定性建模,能够对源和荷的随机波动做出实时响应。最后基于多场景多算法进行算例仿真,结果表明所提方法提高系统运行经济性的同时降低了系统碳排放量。

关键词：园区综合能源系统阶梯式碳交易深度强化学习近端策略优化算法低碳经济调度

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Enhancement of the polynomial functions response surface model for real-time analyzing ozone sensitivity

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Frontiers of Environmental Science & Engineering 2021年第2期15卷 155-168页

作者： Jiangbo Jin Yun Zhu Jicheng Jang Shuxiao Wang Jia Xing pen-Chi Chiang Shaojia fan Shicheng Long Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control College of Environment and EnergySouth China University of TechnologyGuangzhou Higher Education Mega CenterGuangzhou 510006China Southern Marine Science and Engineering Guangdong Laboratory Sun Yat-Sen UniversityZhuhai 519000China State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China Graduate Institute of Environmental Engineering Taiwan UniversityTaipei 10673China Carbon Cycle Research Center Taiwan UniversityTaipei 10672China

Quantification of the nonlinearities between ambient ozone(O3)and the emissions of nitrogen oxides(NOx)and volatile organic compound(VOC)is a prerequisite for an effective O3 control *** Enhanced polynomial functions Response Surface Model(Epf-RSM)with the capability to analyze O3-NOx-VOC sensitivities in real time was developed by integrating the hill-climbing adaptive method into the optimized Extended Response Surface Model(ERSM)*** Epf-RSM could single out the best suited polynomial function for each grid cell to quantify the responses of O3 concentrations to precursor emission *** comparisons between Epf-RSM and pf-ERSM(polynomial functions based ERSM)were performed using out-of-sample validation,together with comparisons of the spatial distribution and the Empirical Kinetic Modeling Approach *** comparison results showed that Epf-RSM effectively addressed the drawbacks of pf-ERSM with respect to overfitting in the margin areas and high biases in the transition *** O3 concentrations predicted by Epf-RSM agreed well with Community Multi-scale Air Quality simulation *** case study results in the Pearl River Delta and the north-western area of the Shandong province indicated that the O3 formations in the central areas of both the regions were more sensitive to anthropogenic VOC in January,April,and October,while more NOx-sensitive in July.

关键词： Response surface model Hill-climbing algorithm Ozone pollution Precursor emissions Control strategy

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