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Machine Learning to Search for Accreting Neutron Star Binary Candidates Using Chinese Space Station Telescope Photometric System

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Research in Astronomy and Astrophysics 2022年第12期22卷 322-334页

作者： shun-Yi lan Kai-Fan Ji Xiang-Cun Meng Yunnan Observatories Chinese Academy of SciencesKunming 650216China Key Laboratory for the Structure and Evolution of Celestial Objects Chinese Academy of SciencesKunming 650216China University of Chinese Academy of Sciences Beijing 100049China

Accreting neutron star binary(ANSB)systems can provide some important information about neutron stars(NSs),especially on the structure and the equation of state of ***,only a few ANSBs are known so *** upcoming Chinese Space Station Telescope(CSST)provides an opportunity to search for a large number of ANSB *** aim to investigate whether or not a machine learning method may efficiently search for ANSBs based on CSST photometric *** this paper,we generate some ANSBs and normal binaries under CSST photometric system by binary evolution and binary population synthesis method and use a machine learning method to train a classification *** consider the classical multi-color disk and the irradiated accretion disk,then compare their effects on the classification *** find that no matter whether the X-ray reprocessing effect is included or not,the machine learning classification accuracy is always very high,i.e.,higher than 96%.If a significant magnitude difference exists between the accretion disk and the companion of an ANSB,machine learning may not distinguish it from some normal stars such as massive main sequence stars,white dwarf binaries,*** classifications of the ANSBs and the normal stars highly overlap in a color–color *** results indicate that machine learning would be a powerful way to search for potential ANSB candidates from the CSST survey.

关键词： stars:neutron X-rays:binaries methods:analytical

Nanonet-/fiber-structured flexible ceramic membrane enabling dielectric energy storage

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Journal of Advanced Ceramics 2023年第1期12卷 145-154页

作者： Lvye DOU Bingbing YANG shun lan Yiqian LIU Yuan-Hua LIN Ce-Wen NAN State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China

Ceramics are considered intrinsically brittle at macro scale due to the lack of slip mechanism and pre-existing defects,which greatly limits their potential applications in emerging fields including wearable electronic devices and flexible *** this contribution,we developed BiFeO_(3)/SiO_(2) dual-networks with exceptional flexibility through a coupled electronetting/electrospun *** hybrid nanostructured networks endow the material with high tensile strength(2.7 MPa),excellent flexibility(80%recoverable deformation),and robust fatigue resistance performance(maintain flexibility after a 1000-cyclic compress test).After in-situ compounded with dielectric polymer via a layer-by-layer solution casting method,the resultant three-dimensional(3D)composite film exhibits a twice higher dielectric constant(εr)than polyether imide(PEI)*** importantly,the breakdown strength of the 3D composite film is almost the same as that of the PEI film,resulting in an enhanced energy density of~6.0 J/cm^(3) and a high efficiency of 80%at 4.58 MV/*** unique structure,combined with the excellent balance between mechanical and dielectric properties in flexible structures,is of critical significance to the design of flexible functional ceramics and broadening their applications in wearable electric devices.

关键词： BiFeO_(3)/SiO_(2)dual-network flexible mechanically robust dielectric energy storage

Annealing atmosphere-dependent capacitive energy storage

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Rare Metals 2023年第5期42卷 1465-1471页

作者： Bing-Bing Yang Hai-Yun Tong shun lan Yi-Qian Liu Lv-Ye Dou Hao Pan Yuan-Hua Lin State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing100084China School of Physics and Materials Engineering Hefei Normal UniversityHefei230601China Department of Materials Science and Engineering University of CaliforniaBerkeley94720USA

Electrostatic capacitors based on dielectrics with high energy density and efficiency are desired for modern electrical systems owing to their intrinsic fast charging-discharging speed and excellent *** longstanding bottleneck is their relatively small energy ***,we report enhanced energy density and efficiency in the Aurivillius Pb_(2)Bi_(4)Ti_(5)O_(18)films by controlling the post-annealing *** results demonstrate that the fabrication atmosphere has significant effects on the film texture and *** the increase of the oxygen pressure of annealing atmosphere,the Pb_(2)Bi_(4)Ti_(5)O_(18)films show a preferred growth orientation of(00l)and fewer defects,which leads to a higher polarization and breakdown field for the film annealed in air atmosphere and thus help to achieve an ultrahigh energy density of59.4 J·cm^(-3)and an improved efficiency of 81.2%.Moreover,the film also exhibits excellent cycling reliability and good thermal *** Pb_(2)Bi_(4)Ti_(5)O_(18)films show a significant potential application for dielectric capacitors.

关键词： Aurivillius phase film Annealing atmosphere Energy density Efficiency

High energy storage capability of perovskite relaxor ferroelectrics via hierarchical optimization

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Rare Metals 2022年第3期41卷 730-744页

作者： Min-Hao Zhang Jun-Lei Qi Yi-Qian Liu shun lan Zi-Xi Luo Hao Pan Yuan-Hua Lin State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China Innovation Team for New High Volumetric Efﬁcient MLCC Materials and Devices Foshan(Southern China)Institute for New MaterialsFoshan 528000China Division of Physics and Applied Physics School of Physical and Mathematical SciencesNanyang Technological UniversitySingapore 639798Singapore

Ultrafast charge/discharge process and ultrahigh power density enable dielectrics essential components in modern electrical and electronic devices, especially in pulse power systems. However, in recent years, the energy storage performances of present dielectrics are increasingly unable to satisfy the growing demand for miniaturization and integration, which stimulates further researches on dielectrics with higher energy density and *** various inorganic dielectrics, perovskite relaxor ferroelectrics are recognized as promising candidates for energy storage applications, with high permittivity and relatively high efficiency. Here, we focus on recent progress and achievements on optimizing perovskite relaxor ferroelectrics toward better energy storage capability through hierarchical design. The principles and key parameters of dielectric energy storage, together with the definition of majority types of dielectrics, are introduced at first. Strategies within various scales include domain, grain size, orientation, and composite engineering are summarized. The existing challenges are presented and future prospects are proposed in the end, with the background of both academic explorations and industrial applications.

关键词： Dielectric Energy storage Capacitance Perovskite Relaxor ferroelectric

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财税政策激励自主创新的理论思考

山东社会科学 2006年第11期 65-68页

作者：曲顺兰河海大学商学院江苏南京210098

本文提出“自主创新”是指我国公民经过其主导的创造性活动而形成的依法拥有的,并能够自我控制的创新成果。由于自主创新所具有的外部性、风险与不确定性和信息的不对称性等特性,在市场存在缺陷的情况下,成为财税政策实施的有效理由。... 详细信息

本文提出“自主创新”是指我国公民经过其主导的创造性活动而形成的依法拥有的,并能够自我控制的创新成果。由于自主创新所具有的外部性、风险与不确定性和信息的不对称性等特性,在市场存在缺陷的情况下,成为财税政策实施的有效理由。只要财税激励制度设计得适当,就能够低成本地有效地实现公共政策目标。要从加强和完善政府科技投入总量和结构、改革财税制度、实施财税激励等方面采取措施,提高我国的自主创新能力。

关键词：技术创新财税激励 R&D 经费支出

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台湾教科书编审历程与出版

湖南师范大学教育科学学报 2015年第2期14卷 5-8页

作者：蓝顺德佛光大学台湾宜兰26247

教科书是教学活动的重要依据和学生学习的主要资源,此研究探讨台湾中小学教科书编审制度,胪列近70年来台湾教科书统编与审定制度演进,提出课程规划、编辑审查、市场机制、使用与评鉴等五阶段的教科书发展历程,分析台湾现行教科书审定规... 详细信息

教科书是教学活动的重要依据和学生学习的主要资源,此研究探讨台湾中小学教科书编审制度,胪列近70年来台湾教科书统编与审定制度演进,提出课程规划、编辑审查、市场机制、使用与评鉴等五阶段的教科书发展历程,分析台湾现行教科书审定规范,以及审查运作程序与沟通机制,阐述教科书产业的特质,提出"教育归教育、市场归市场"之基本原则,并建议推动教科书学术研究发展、理性探究教科书意识形态与改进教科书计价议价制度等策略。

关键词：台湾地区中小学教科书编审制度

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基于市场机制的多项目分散式调度问题

计算机集成制造系统 2014年第8期20卷 1969-1979页

作者：王磊战德臣聂兰顺哈尔滨工业大学计算机科学与技术学院黑龙江哈尔滨150001 中国科学院苏州生物医学工程技术研究所江苏苏州215163

鉴于传统的基于集中优化方法难以很好解决优先级未知环境下的多项目工期优化问题,基于分散式局部决策与协调决策相结合的求解思想,提出融合局部优化与共享资源竞标出价、资源组合拍卖与价格迭代调整的基于市场机制的分散式项目调度方法... 详细信息

鉴于传统的基于集中优化方法难以很好解决优先级未知环境下的多项目工期优化问题,基于分散式局部决策与协调决策相结合的求解思想,提出融合局部优化与共享资源竞标出价、资源组合拍卖与价格迭代调整的基于市场机制的分散式项目调度方法,以减小多项目计划工期与最佳工期的平均差距。通过仿真实验,验证了分散式解法相比于集中式解法的优势和适用性,能够解决集中方法难以求解的项目优先级未知或不确定的多项目调度问题。

关键词：项目调度分散式决策市场机制竞争判优

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柔性无机铁电薄膜的制备及其应用

物理学报 2020年第21期69卷 281-296页

作者：蓝顺潘豪林元华清华大学材料学院新型陶瓷与精细工艺国家重点实验室北京100084

无机铁电薄膜材料有着优异的电、光特性,被广泛应用于介电、信息存储、压电、光电等领域.然而,基于单晶刚性基底和高温、含氧的合成环境的传统制备工艺,大大限制了其在柔性电子器件中的应用.实现无机铁电薄膜材料的柔性化可以将这些材... 详细信息

无机铁电薄膜材料有着优异的电、光特性,被广泛应用于介电、信息存储、压电、光电等领域.然而,基于单晶刚性基底和高温、含氧的合成环境的传统制备工艺,大大限制了其在柔性电子器件中的应用.实现无机铁电薄膜材料的柔性化可以将这些材料的性能优势进一步应用到可穿戴电子器件中,是下一代可穿戴电子器件领域的重要发展方向.本文综述了无机钙钛矿结构铁电薄膜的柔性化制备工艺,包括直接在柔性基底上生长和将铁电薄膜从刚性基底上剥离、转印到柔性基底两类.并介绍了柔性无机铁电薄膜的应用,对其研究现状及未来发展进行了总结与展望.

关键词：无机铁电薄膜柔性钙钛矿制备

High-temperature BaTiO_(3) -based ceramic capacitors by entropy engineering design

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Journal of Advanced Ceramics 2024年第9期13卷 1498-1504页

作者： Yan Song Min Zhang shun lan Bingbing Yang Yiqian Liu Ce-Wen Nan Yuan-Hua Lin State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China Key Laboratory of Materials Physics Institute of Solid State PhysicsChinese Academy of SciencesHefei 230031China

High-performance BaTiO_(3)(BTO)-based dielectric ceramics have great potential for high-power energy storagedevices. However, its poor temperature reliability and stability due to its low Curie temperature impedes the development ofmost electronic applications. Herein, a series of BTO-based ceramics are designed and prepared on the basis of entropyengineering. Owing to the incorporation of Bi(Mg_(0.5)Ti_(0.5))O_(3), relaxation behavior and low dielectric loss at high temperatureshave been achieved. Moreover, the high-entropy strategy also promotes lattice distortion, grain refinement and excellentresistance, which together increase the breakdown field strength. These simultaneous effects result in outstanding energystorage performance, ultimately achieving stable energy density (U_(e)) of 5.76 J·cm^(−3) and efficiency ( η) of 89%. Mostimportantly, the outstanding temperature stability makes high-entropy BTO-based ceramics realize a significant energystorage density of 4.90 0.14 J·cm^(−3) with the efficiency above 89%, spanning a wide temperature range of 25–250 ℃, aswell as cycling reliability with negligible performance deterioration after 3 105 cycles at 300 kV∙cm^(−1) and 200 ℃. Thisresearch presents an effective method for designing temperature-stable and reliable dielectrics with comprehensive energystorage performance.

关键词： BaTiO_(3)-based ceramics high-entropy effects high-temperature energy storage cycling reliability