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Probing the dark side of the Universe with weak gravitational lensing effects

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Research in Astronomy and Astrophysics 2014年第9期14卷 1061-1120页

作者： li-ping fu Zu-Hui Fan Shanghai Key Lab for Astrophysics Shanghai Normal University Department of Astronomy School of Physics Peking University

Arising from gravitational deflections of light rays by large-scale struc- tures in the Universe, weak-lensing effects have been recognized as one of the most important probes in cosmological studies. In this paper, we review the main progress in weak-lensing analyses, and discuss the challenges in future investigations aiming to understand the dark side of the Universe with unprecedented precisions.

关键词： cosmology: dark matter and dark energy -- large-scale structure of uni- verse -- gravitational lensing

Application of Self-Learning to Heating Process Control of Simulated Continuous Annealing

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Journal of Iron and Steel Research International 2010年第6期17卷 27-31页

作者： WANG Wen-le li Jian-ping HUA fu-an liUXiang-hua State Key Laboratory of Rolling Technology and Automation Northeastern University Shenyang 110004 Liaoning China

On the basis of a simulated bright continuous annealing experimental machine, a process control model for heating system was built. The heating model was simplified and self-learning parameters were normalized to enhance the precision of temperature control. By means of the division of temperature layers and the exponential smoothing disposal of the annealing experimental data, the self-learning of the heating model was carried out. Through exponentially smoothing the deviation of self-learning parameters of the heated phase in heating process, dynamic modifications of self-learning parameters and heating electric current were carried out, and the precision of temperature control was confirmed. The application indicated that the process control model for the heating system can control temperature with high precision, and the deviation can be controlled within 8 ℃.

关键词： annealing simulation annealing maehine process control self-learning

TiOx-based self-rectifying memory device for crossbar WORM memory array applications

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Chinese Physics B 2021年第1期30卷 365-368页

作者： li-ping fu Xiao-Qiang Song Xiao-ping Gao Ze-Wei Wu Si-Kai Chen Ying-Tao li Key Laboratory of Special function Materials and Structure Design Ministry of EducationLanzhou UniversityLanzhou 730000China School of Physical Science and Technology Lanzhou UniversityLanzhou 730000China Key Laboratory of Sensor and Sensing Technology Gansu ProvinceLanzhou 730000China

Resistive switching with a self-rectifying feature is one of the most effective solutions to overcome the crosstalk issue in a crossbar array. In this paper, a memory device based on Pt/TiO_(x)/W structure with self-rectifying property is demonstrated for write-once-read-many-times(WORM) memory application. After programming, the devices exhibit excellent uniformity and keep in the low resistance state(LRS) permanently with a rectification ratio as high as 10^(4) at ±1 V. The self-rectifying resistive switching behavior can be attributed to the Ohmic contact at TiO_(x)/W interface and the Schottky contact at Pt/TiO_(x) interface. The results in this paper demonstrate the potential application of TiO_(x)-based WORM memory device in crossbar arrays.

关键词： resistive switching memory write-once-read-many-times(WORM) self-rectifying crossbar array

Synthesis of 4(3H)-Quinazolinone Derivatives and Their in vitro Antitumor Activity

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有机化学 2004年第Z1期24卷 247-248页

作者： CAO,Sheng-li FENG,Yu-ping fu,Hua FENG,Ke-Ran Department of Chemistry Capital Normal University Beijing 100037 Key Laboratory of Bioorganic Phosphorus Chemistry Ministry of Education Department of Chemistry Tsinghua University Beijing 100084 Key Laboratory of Bioorganic Phosphorus Chemistry Ministry of Education Department of Chemistry Tsinghua University Beijing 100084 Department of Chemistry Capital Normal University Beijing 100037

　　Classical antifolates containing L-glutamic acid moiety in molecule have shortcomings such as drug resistance which is originated from the defective cell transport by mutation, and toxicity to the host which is due to unnecessarily long retention inside normal cells.[1] One strategy to overcome these shortcomings is to design nonclassical lipophilic inhibitors of folate requiring enzymes by deleting or modifying L-glutamic acid component from the folate analogues.……

关键词： Antitumor Activity drug resistance

Probing the Gamma-Ray Emission Region of Five TeV Flat Spectrum Radio Quasars

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Research in Astronomy and Astrophysics 2024年第6期24卷 156-169页

作者： Hu-Bing Xiao Hai-Tao Cao Rui Xue Jin-Ting Cai Ge-Ge Wang Marina Manganaro Shao-Hua Zhang Zhi-Hao Ouyang li-ping fu Jun-Hui Fan Shanghai Key Lab for Astrophysics Shanghai Normal UniversityShanghai 200234China School of Information Engineering Guangzhou Panyu PolytechnicGuangzhou 511483China Department of Physics Zhejiang Normal UniversityJinhua 321004China College of Mathematics and Physics Guangxi Minzu UniversityNanning 530006China Key Laboratory of Cosmology and Astrophysics(liaoning) College of SciencesNortheastern UniversityShenyang 110819China Department of Physics University of RijekaRijeka 51000Croatia Center for Astrophysics Guangzhou UniversityGuangzhou 510006China Key Laboratory for Astronomical Observation and Technology of Guangzhou Guangzhou 510006China Astronomy Science and Technology Research Laboratory of Department of Education of Guangdong Province Guangzhou 510006China

The location ofγ-ray emission of blazars remains a contested topic,inspiring the development of numerous investigative techniques to address this *** this work,we analyzed Fermiγ-ray light curves in the GeV and MeV bands,employing the discrete cross-correlation function method to discern time lags between the two *** 4C+21.35,Ton 599,B21420+32,and PKS 1510-089,we identified a time lag spanning several days,while for PKS 1441+25,the time lag was not statistically *** results imply that the soft photons necessary for inverse Compton scattering predominantly originate from the dusty torus in the first four sources,whereas for PKS1441+25,they seem to be sourced mainly from the broad-line *** analysis of the opacity(τγγ)and the GeV spectra study supports the conclusion that the location of the dissipation region must be beyond the BLR to avoid significant ***,for PKS 1441+25,the emission region is also posited to lie outside yet proximate to the *** parameters of describing the emission region were obtained by fitting broadband spectral energy distribution with contemporaneous observation *** findings suggest that for the five TeV FSRQs,during Te V flaring events,the jet appears to maintain an equilibrium between the energy density of the magnetic field and that of the particles for all investigated sources,with the exceptions of 4C+21.35 and PKS1441+*** terms of the overall jet power,particle energy is the dominant contributor,and the observed blazar radiation cannot be solely attributed to the magnetic field,except in the case of 4C+***,magnetic reconnection is unlikely to be the primary mechanism behind particle acceleration in these systems.

关键词： galaxies:active gamma-rays:galaxies galaxies:jets

Earthquake damage and loss estimation with Geographic Information System

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Acta Seismologica Sinica(English Edition) 1998年第6期11卷 95-102页

作者： YONG CHEN GE ping li QI fu CHEN liNG CHEN MIN FENG li Center for Analysis and Prediction, China Seismological Bureau, Beijing 100036, China

The present paper first includes a brief discussion of GIS technology. Next, the various steps in a regional earthquake damage and loss analysis are discussed, with emphasis on their implementation in the GIS environment. Lastly, a software of WorldRisk which was completed recently are presented to illustrate GIS based global earthquake damage and loss estimation.

关键词： GIS earthquake damage loss estimation

泵站优化调度中考虑一次性开机约束的改进遗传算法

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水利水电技术 2006年第8期37卷 94-96页

作者：李彬李平夫扬州大学信息工程学院江苏扬州225009 徐州水利局江苏徐州221005

泵站优化调度中常规的遗传算法是以每台机组各时段的运行状态作为优化变量,其变量数多,难以收敛。针对泵站中一次性开机的约束条件,提出了以运行起始时刻和运行结束时刻作为优化变量的优化模型,该模型变量少且自然满足一次性引水约束条... 详细信息

泵站优化调度中常规的遗传算法是以每台机组各时段的运行状态作为优化变量,其变量数多,难以收敛。针对泵站中一次性开机的约束条件,提出了以运行起始时刻和运行结束时刻作为优化变量的优化模型,该模型变量少且自然满足一次性引水约束条件,简化了约束处理。针对泵站同型号机组在优化过程中出现的振荡,提出了采用实数编码的带优先级的处理方法,并采用多点交叉、变异处理,提高了收敛速度。

关键词：泵站优化调度遗传算法编码

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不同粒径SiC对氟醚橡胶性能的影响

航空材料学报 2008年第5期28卷 89-93页

作者：蒋洪罡王力栗付平朱丽平北京航空材料研究院北京100095

研究了不同粒径SiC对氟醚硫化胶力学性能,导热性能和摩擦磨损性能的影响。结果表明,随着SiC粒径的减小,橡胶100%定伸模量增大,拉伸强度提高;填充体积含量为15%的20nm SiC时橡胶的综合力学性能比较优异;大粒径SiC与基体间的界面热阻更小... 详细信息

研究了不同粒径SiC对氟醚硫化胶力学性能,导热性能和摩擦磨损性能的影响。结果表明,随着SiC粒径的减小,橡胶100%定伸模量增大,拉伸强度提高;填充体积含量为15%的20nm SiC时橡胶的综合力学性能比较优异;大粒径SiC与基体间的界面热阻更小,比小粒径填料更能提高橡胶的导热性能;不同粒径的SiC以一定比例并用也可以提高橡胶的导热系数;SiC晶须能显著提高橡胶的摩擦磨损性能。

关键词：氟醚橡胶碳化硅力学性能导热系数摩擦磨损

低浓度镉胁迫下2种水生植物体内植物络合素的响应

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四川大学学报（工程科学版） 2008年第6期40卷 86-91页

作者：王超王丽娅孙琴李平夫河海大学水文水资源与水利工程科学国家重点实验室江苏南京210098 河海大学环境科学与工程学院浅水湖泊资源与综合整治教育部重点实验室江苏南京210098 徐州市水利建筑设计研究院江苏徐州224002

采用溶液培养方式,研究了水环境低浓度镉(Cd)(0.01~0.64μmol/L)较长时间胁迫下漂浮植物水浮莲(Pistia stratiotesL.)和沉水植物伊乐藻(Elodea nuttallii)体内植物络合素(PCs)的响应规律。结果显示,2种水生植物对外界Cd胁迫表现出明显... 详细信息

采用溶液培养方式,研究了水环境低浓度镉(Cd)(0.01~0.64μmol/L)较长时间胁迫下漂浮植物水浮莲(Pistia stratiotesL.)和沉水植物伊乐藻(Elodea nuttallii)体内植物络合素(PCs)的响应规律。结果显示,2种水生植物对外界Cd胁迫表现出明显的吸收和积累效应,水浮莲体内PCs的响应明显强于伊乐藻。水浮莲体内的PCs诱导量与Cd处理浓度存在良好的剂量-效应关系,Cd浓度≥0.08μmol/L水浮莲根系产生明显毒害效应并伴随根系PCs的诱导量急剧增加。回归分析显示,2种水生植物体内PCs的合成水平与Cd的生物毒性呈现一定的线性关系,表明PCs可作为重金属Cd胁迫的生物标记物指示水体中重金属的毒害程度。比较而言,水浮莲体内PCs对Cd污染更为敏感,可通过检测其根系PCs的含量来评价和预测实际水环境中Cd的污染。

关键词：植物络合素镉水生植物水浮莲伊乐藻