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多粒度语言信息的交互式多属性群决策方法及应用 预览
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作者 袁宇翔 孙静春 《运筹与管理》 CSSCI CSCD 北大核心 2019年第6期25-32,共8页
针对目前多阶段交互式决策的研究多是基于点值的缺陷,以及大多数研究忽视了从多个属性对方案进行评价等不足,本文探讨了一种基于多粒度语言信息的交互式多属性群决策方法。首先基于不确定语言变量提出了多粒度语言信息的转换函数,并在... 针对目前多阶段交互式决策的研究多是基于点值的缺陷,以及大多数研究忽视了从多个属性对方案进行评价等不足,本文探讨了一种基于多粒度语言信息的交互式多属性群决策方法。首先基于不确定语言变量提出了多粒度语言信息的转换函数,并在给出若干假设的前提下描述了交互式多属性群决策的过程,然后提出了交互影响因子来度量决策者的“话语权”,通过稳定性指标探讨交互终止条件;接着在不确定语言变量的加权算术平均(ULWA)算子和诱导多阶段交互加权算子(I-UOWA和I-UOWGA)的基础上对偏好信息进行集结,再提出优势可能度法对方案排序。最后给出了一个物流供应商选择的案例研究。 展开更多
关键词 多粒度 交互 不确定语言变量 交互影响因子 物流供应商选择
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Predicting enhancer-promoter interaction from genomic sequence with deep neural networks
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作者 Shashank Singh Yang Yang +1 位作者 Barnabas Poczos Jian Ma 《中国电气与电子工程前沿:英文版》 CSCD 2019年第2期122-137,共16页
Background:In the human genome,distal enhancers are involved in regulating target genes through proximal promoters by forming enhancer-promoter interactions.Although recently developed high-throughput experimental app... Background:In the human genome,distal enhancers are involved in regulating target genes through proximal promoters by forming enhancer-promoter interactions.Although recently developed high-throughput experimental approaches have allowed us to recognize potential enhancer-promoter interactions genome-wide,it is still largely unclear to what extent the sequence-level information encoded in our genome help guide such interactions.Methods:Here we report a new computational method (named "SPEID") using deep learning models to predict enhancer-promoter interactions based on sequence-based features only,when the locations of putative enhancers and promoters in a particular cell type are given.Results:Our results across six different cell types demonstrate that SPEID is effective in predicting enhancerpromoter interactions as compared to state-of-the-art methods that only use information from a single cell type.As a proof-of-principle,we also applied SPEID to identify somatic non-coding mutations in melanoma samples that may have reduced enhancer-promoter interactions in tumor genomes.Conclusions^ This work demonstrates that deep learning models can help reveal that sequence-based features alone are sufficient to reliably predict enhancer-promoter interactions genome-wide. 展开更多
关键词 CHROMATIN INTERACTION enhancer-promoter INTERACTION DEEP NEURAL network
A close look at the competition of isovector and isoscalar pairing in A=18 and 20 even-even N≈Z nuclei
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作者 潘峰 周丹 +4 位作者 杨思雨 Grigor Sargsyan 赫英雯 Kristina D. Launey Jerry P.Draayer 《中国物理C:英文版》 SCIE CAS CSCD 2019年第7期70-78,共9页
competition of isovector and isoscalar pairing in A=18 and 20 even-even N≈Z nuclei is analyzed in the framework of the mean-field plus the dynamic quadurpole-quadurpole, pairing and particle-hole interactions, whose ... competition of isovector and isoscalar pairing in A=18 and 20 even-even N≈Z nuclei is analyzed in the framework of the mean-field plus the dynamic quadurpole-quadurpole, pairing and particle-hole interactions, whose Hamiltonian is diagonalized in the basis U(24)■(U(6)■ S U(3)■ S O(3))■(U(4)■S US(2)■ S UT(2)) in the L = 0 configuration subspace. Besides the pairing interaction, it is observed that the quadurpole-quadurpole and particlehole interactions also play a significant role in determining the relative positions of low-lying excited 0^+ and 1^+ levels and their energy gaps, which can result in the ground state first-order quantum phase transition from J = 0 to J = 1.The strengths of the isovector and isoscalar pairing interactions in these even-even nuclei are estimated with respect to the energy gap and the total contribution to the binding energy. Most importantly, it is shown that although the mechanism of the particle-hole contribution to the binding energy is different, it is indirectly related to the Wigner term in the binding energy. 展开更多
关键词 isovector and ISOSCALAR PAIRING INTERACTION particle-hole INTERACTION light mass N≈Z NUCLEI
激光切割机智能交互识别系统的设计
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作者 吴杨婷 汪丹 《激光杂志》 北大核心 2019年第7期148-151,共4页
传统切割工艺设备不仅切割误差大,而且需要工作人员全面控制切割机进行工件加工,为此设计激光切割机智能交互识别系统,系统中语音交互识别模块接收工作人员下达的语音控制信号后,传输至激光传感器模块测量待切割工件与切割机具体加工距... 传统切割工艺设备不仅切割误差大,而且需要工作人员全面控制切割机进行工件加工,为此设计激光切割机智能交互识别系统,系统中语音交互识别模块接收工作人员下达的语音控制信号后,传输至激光传感器模块测量待切割工件与切割机具体加工距离和数据,统计加工切割误差对比测量结果传输至测量造型模块进行切割。语音交互识别模块采用基于混合特征的智能语音识别算法,识别用户语音指令。实验结果验证,所设计系统不仅识别效果较好,而且在噪声环境中的识别精准度较高。 展开更多
关键词 激光 切割 交互 识别 语音交互 传感器 混合特征
人体真菌组与疾病 预览
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作者 沈鑫 姚羽菲 +1 位作者 李继遥 李燕 《华西口腔医学杂志》 CAS CSCD 北大核心 2019年第3期314-319,共6页
真菌组在人体微生物组中所占比例不到1%,但真菌群落在人体健康与疾病状态中扮演着关键角色。近年来随着高通量测序技术的广泛应用,人体不同部位如口腔、肺部、消化道、阴道以及皮肤真菌组的结构和组成被解析,其在人体健康和疾病中的重... 真菌组在人体微生物组中所占比例不到1%,但真菌群落在人体健康与疾病状态中扮演着关键角色。近年来随着高通量测序技术的广泛应用,人体不同部位如口腔、肺部、消化道、阴道以及皮肤真菌组的结构和组成被解析,其在人体健康和疾病中的重要地位也被挖掘。同时,人体真菌组对细菌组的组成也有影响,是维持微生物组结构和代谢功能稳定的关键物种;真菌组对宿主的免疫应答作用也对某些疾病的发生发展有显著影响。本文综述了人体不同部位健康与疾病状态下真菌组组成情况以及真菌组与细菌组、宿主免疫的相互作用。 展开更多
关键词 真菌组 疾病 细菌组 相互作用 宿主免疫反应
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Development of naoe-FOAM-SJTU solver based on OpenFOAM for marine hydrodynamics 预览
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作者 Jian-hua Wang Wei-wen Zhao De-cheng Wan 《水动力学研究与进展:英文版》 SCIE EI CSCD 2019年第1期1-20,共20页
A CFD solver naoe-FOAM-SJTU (The abbreviation naoe stands for naval architecture and ocean engineering) is developed based on the open source platform OpenFOAM with the purpose of simulating various marine hydrodynami... A CFD solver naoe-FOAM-SJTU (The abbreviation naoe stands for naval architecture and ocean engineering) is developed based on the open source platform OpenFOAM with the purpose of simulating various marine hydrodynamic problems.In the present paper,self-developed modules,i.e.,wave generation and absorption,6 degrees of freedom motion,mooring system,dynamic overset grid,fluid-structure interaction,unsteady actuator line model,implemented on the open source platform OpenFOAM are introduced to illustrate the development of the marine hydrodynamics CFD solver.Furthermore,extensive simulations of marine hydrodynamic problems using the developed modules are conducted and validated by available experimental data.It has been proved that the CFD solver naoe-FOAM-SJTU is suitable and reliable in predicting the complex viscous flow around ship and offshore structures.Efficiency and accuracy need to be focused in the future development of the present CFD solver. 展开更多
关键词 MARINE HYDRODYNAMICS fluid-structure INTERACTION overset GRID naoe-FOAM-SJTU SOLVER OPENFOAM
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幼儿音乐教育中音乐与游戏的结合 预览
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作者 尹琳 《教育信息化论坛》 2019年第5期261-262,共2页
当今的社会飞速发展,社会经济进入了新的发展时期,人们的生活水平也随着经济的发展大幅度地提高了。生活质量得到了改善,人们对生活的要求也提高了。在新的时期,教育进行了深入的改革,在这之中艺术的教育也得到了足够的重视与认可,更加... 当今的社会飞速发展,社会经济进入了新的发展时期,人们的生活水平也随着经济的发展大幅度地提高了。生活质量得到了改善,人们对生活的要求也提高了。在新的时期,教育进行了深入的改革,在这之中艺术的教育也得到了足够的重视与认可,更加注重幼儿的音乐教育。由于幼儿的年级比较小,主要集中在三至六岁,这个时期的孩子处于心理与生理起步的阶段,所以就需要对于幼儿增加音乐方面的教育,教育的方式也与正常的学生或者成人的教育方式不一样,而应该依据幼儿的性格特点来制定音乐教育的方式。从幼儿的特点进行研究,并依据他们的特点来制定适合幼儿的音乐教育方式与方法,探究交互的游戏在音乐教育中的作用。 展开更多
关键词 幼儿 音乐教育 交互作用 游戏
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Shape dependence of support for NOx storage and reduction catalysts
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作者 Wen Xie Yunbo Yu Hong He 《环境科学学报:英文版》 SCIE EI CAS CSCD 2019年第1期396-407,共12页
Pt/BaO/Al2O3catalysts with different BaO loadings prepared from Al2O3nanorods (Pt/BaO/ Al2O3-nr)and irregular Al2O3nanoparticles (Pt/BaO/Al2O3-np)were investigated for NOx storage and reduction (NSR).The Pt/BaO/Al2O3 ... Pt/BaO/Al2O3catalysts with different BaO loadings prepared from Al2O3nanorods (Pt/BaO/ Al2O3-nr)and irregular Al2O3nanoparticles (Pt/BaO/Al2O3-np)were investigated for NOx storage and reduction (NSR).The Pt/BaO/Al2O3 materials derived from Al2O3nanorods always exhibited much higher NOx storage capacity (NSC)over the whole temperature range of 100-400℃ than the corresponding Pt/BaO/Al2O3-np samples containing the same BaO loading,giving the maximum NSC value of 966.9μmol/gcat at 400℃,1.4times higher than that of Pt/BaO/Al2O3-np.Higher catalytic performance of nanorod-supported NSR samples was also observed during lean-rich cyclic conditions (90sec us.S sec),giving more than 98%NOx conversion at 300-450℃ over the Pt/BaO/Al2O3-nr sample with 15% BaO loading.To reveal this dependence on the shape of the support during the NSR process,a series of characterization techniques including the Brunauer-Emmett-Teller (BET)method, X-ray diffraction (XRD),X-ray photoelectron spectroscopy (XPS),H2temperature pro- grammed reduction (H2-TPR),and in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS)were also conducted.It was found that intimate contact of Ba-A1and Ba-Pt sites was achieved over the Pt/BaO/Al2O3surface when using Al2O3-nr as a support. This strong interaction among the multi-components of Pt/BaO/Al2O3-nr thus triggered the formation of surface nitrite and nitrate during the lean period,and also accelerated the reverse spillover of ad-NOx species onto the Pt surface,enhancing their reduction and leading to high NSR performance. 展开更多
关键词 NOx storage and reduction Pt/BaO/Al2O3 Nanorod MORPHOLOGY effect STRONG interaction
食品添加剂与蛋白质相互作用的研究方法及进展 预览
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作者 段然 吴笛 +2 位作者 胡霞 梅森 杨浩 《成都大学学报:自然科学版》 2019年第1期9-15,共7页
在食品科学领域中,从分子水平上研究生物蛋白质与食用性小分子的相互作用,对揭示食品添加剂在生物体中的分布、代谢、储存和添加剂对生物体的毒性等有着重要的参考意义.在查阅大量文献后,介绍了蛋白质与活性小分子在食品科学领域中的研... 在食品科学领域中,从分子水平上研究生物蛋白质与食用性小分子的相互作用,对揭示食品添加剂在生物体中的分布、代谢、储存和添加剂对生物体的毒性等有着重要的参考意义.在查阅大量文献后,介绍了蛋白质与活性小分子在食品科学领域中的研究技术,总结了本领域的相关研究方法,综述了本领域近年来的研究成果,并对该领域未来的发展方向进行了分析和展望. 展开更多
关键词 蛋白质 相互作用 食品添加剂 食用色素
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Development of a fully coupled aero-hydro-mooring-elastic tool for floating offshore wind turbines 预览
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作者 Yuanchuan Liu Qing Xiao 《水动力学研究与进展:英文版》 SCIE EI CSCD 2019年第1期21-33,共13页
A floating offshore wind turbine (FOWT) is a coupled system where a wind turbine with flexible blades interacts with a moored platform in wind and waves.This paper presents a high-fidelity aero-hydro-mooring-elastic a... A floating offshore wind turbine (FOWT) is a coupled system where a wind turbine with flexible blades interacts with a moored platform in wind and waves.This paper presents a high-fidelity aero-hydro-mooring-elastic analysis tool developed for FOWT applications.A fully coupled analysis is carried out for an OC4 semi-submersible FOWT under a combined wind/wave condition.Responses of the FOWT are investigated in terms of platform hydrodynamics,mooring dynamics,wind turbine aerodynamics and blade structural dynamics.Interactions between the FOWT and fluid flow are also analysed by visualising results obtained via the CFD approach.Through this work,the capabilities of the tool developed are demonstrated and impacts of different parts of the system on each other are investigated. 展开更多
关键词 FLOATING offshore wind turbine fluid-structure interaction blade ELASTICITY MOORING dynamics OPENFOAM
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双馈风电机组动力学特性与电力系统动态行为的交互影响分析 预览
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作者 和萍 曲忠杰 +2 位作者 李从善 耿斯涵 姚依林 《电力系统及其自动化学报》 CSCD 北大核心 2019年第5期70-76,共7页
风力发电是目前利用可再生能源最有效方式之一。风电渗透率的不断提高使其对电力系统的影响更加明显,研究其动力学特性与电力系统动态行为的交互影响确保电力系统的稳定运行具有重要意义。首先基于完整的双馈风电机组数学模型,在IEEE4机... 风力发电是目前利用可再生能源最有效方式之一。风电渗透率的不断提高使其对电力系统的影响更加明显,研究其动力学特性与电力系统动态行为的交互影响确保电力系统的稳定运行具有重要意义。首先基于完整的双馈风电机组数学模型,在IEEE4机2区域系统上,采用特征根分析和时域仿真分析研究了双馈风电机组参数的变化对系统动态特性的影响,分析了调速器参数对风电并网后系统动态响应的影响,并从DFIG并网接入点、并网容量以及联络线传输功率等多方面研究了其与电力系统的交互影响。结果表明:双馈风电机组并网后,调速器的加入可以改善系统的动态响应;适当地增大双馈风电机的定子电阻,有利于系统的稳定;双馈风电机组的并网接入点、联络线传送功率以及出力水平对系统的鲁棒性有不同程度的影响。 展开更多
关键词 双馈风电机组 电力系统 特征根分析 交互影响
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CBM的结构、应用及与多糖的相互作用研究进展 预览
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作者 张雨 王晓燕 +3 位作者 张鑫宇 王沛沛 田静 宋君龙 《纤维素科学与技术》 CAS CSCD 2019年第2期66-73,84共9页
碳水化合物结合模块(CBM)是碳水化合物活性酶的重要组成部分,其功能是识别并结合到多糖底物上以增加催化模块在底物上的浓度并提高活性。不同家族的CBM具有不同的结构和结合特异性,与底物的相互作用也存在差异。CBM与多糖表面的特异性... 碳水化合物结合模块(CBM)是碳水化合物活性酶的重要组成部分,其功能是识别并结合到多糖底物上以增加催化模块在底物上的浓度并提高活性。不同家族的CBM具有不同的结构和结合特异性,与底物的相互作用也存在差异。CBM与多糖表面的特异性吸附决定了蛋白质-多糖复合材料的化学性能和机械性能。从CBM的结构与分类、功能与应用、CBM与多糖的相互作用与检测方法等方面对CBM近年的研究进行了综述,特别是对其作为独立功能单元运用到纤维改性,生物纯化和生物修复方面的应用进行了总结。 展开更多
关键词 碳水化合物结合模块 多糖 相互作用 吸附 石英晶体微天平
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Guidelines for the use of accelerated pavement testing data in autonomous vehicle infrastructure research
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作者 Wynand J. udM. Steyn James W. Maina 《交通运输工程学报(英文版)》 CSCD 2019年第3期273-281,共9页
There is much research conducted on the vehicle technologies required for operation of autonomous vehicles(AV) on public roads, as well as analysis of the interaction between AV and the road environment. However, limi... There is much research conducted on the vehicle technologies required for operation of autonomous vehicles(AV) on public roads, as well as analysis of the interaction between AV and the road environment. However, limited research exists on the impact of AV on road pavement structures. The research includes issues such as the effect of more channelized traffic loading, shorter inter-vehicle following distances and potential higher traffic volumes of more uniform vehicle types and loads. This paper discusses the application of existing and generation of new, relevant accelerated pavement testing(APT) data in understanding the effects of AV on pavement infrastructure. The paper presents development of provisional guidelines for the use and application of APT data to ensure that road pavement structures cope with anticipated increase in AV use. It is concludes that the use of AV fleets on existing road pavement infrastructure may lead to different behaviors and responses than what became the norm under non-autonomous vehicle fleets;appropriate analysis of existing APT data will contribute to the improved understanding of these expected changes in behaviors and responses; appropriate planning of AV operations-focused APT is possible with existing technology to contribute to the provision of economic and durable road pavement infrastructure in future. 展开更多
关键词 AUTONOMOUS VEHICLES ACCELERATED PAVEMENT testing Vehicle-pavement interaction ROAD INFRASTRUCTURE
依托社区卫生服务中心的高校社区护理人才培养研究 预览
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作者 迟璐璐 钟文娟 +5 位作者 鲁宏霞 刘丽明 王芬 任华 杜春齐 黄钦鑫 《武汉轻工大学学报》 2019年第3期78-82,共5页
探讨高校护生对社区卫生服务的认知、参与态度及对在社区参与中提升自身能力的需求。加强高校与社区卫生服务中心合作,为培养高水平、实用型创新型社区护理人才提供依据,推动社区卫生服务及社区护理教育的发展。本文采取分层随机抽样法... 探讨高校护生对社区卫生服务的认知、参与态度及对在社区参与中提升自身能力的需求。加强高校与社区卫生服务中心合作,为培养高水平、实用型创新型社区护理人才提供依据,推动社区卫生服务及社区护理教育的发展。本文采取分层随机抽样法,采用自行设计的问卷对武汉市某高校229名护生进行调查。55.5%的护生对社区卫生服务不了解,护生对社区服务的认识46.3%来自教学课堂;88.2%的护生愿意成为社区卫生服务的志愿者,护生认为最想在社区提升自身能力排在前五位的依次是:对社区常见急症、创伤和中毒的现场救助能力,对儿童的计划免疫和预防接种知识的宣教和实际操作能力,对患者进行健康教育的能力,团队协作的能力,对社区老年人健康保健的护理能力。依托社区卫生服务中心,鼓励高校护生与社区卫生服务中心互动,重视社区护理教育的发展,提高护生的综合能力,培养实用型创新型社区护理人才。 展开更多
关键词 护生 互动 人才培养
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基于多中心横断面调查的中国人群代谢综合征的流行情况及危险因素
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作者 郭海健 念馨 +8 位作者 梁友芳 王新玲 李凯利 王清 涂萍 严孙杰 张力辉 王蓓 孙子林 《中华疾病控制杂志》 CAS CSCD 北大核心 2019年第7期796-801,共6页
目的调查中国不同民族人群代谢综合征流行状况及危险因素。方法通过多阶段分层随机抽样,检测调查对象的代谢综合征相关指标,并按照国家第六次人口普查数据进行标化,多因素及对数线性模型分析危险因素及交互作用。结果多民族人群的代谢... 目的调查中国不同民族人群代谢综合征流行状况及危险因素。方法通过多阶段分层随机抽样,检测调查对象的代谢综合征相关指标,并按照国家第六次人口普查数据进行标化,多因素及对数线性模型分析危险因素及交互作用。结果多民族人群的代谢综合征(metabolic syndrome,MS)患病率为19. 58%,朝鲜族的MS患病率最高,其次是汉族,哈萨克族的MS患病率最低;MS及超重肥胖等4项指标检出率,男性高于女性,随着年龄的升高而升高;多因素分析结果显示,女性患MS风险是男性的0. 556倍;年龄越大,患MS的风险越大;中心型肥胖人群MS的风险比2. 765,同时腰身比大于0. 52的风险比为4. 259;利用对数线性模型,分析超重/肥胖,高血糖、高血压和血脂紊乱,4个指标之间的关系,显示4个指标有独立的效应,因素之间又有交互作用,且存在部分3因素交互作用。结论不同民族MS发生率存在明显差异,MS的高发生率及各指标间存在正向交互作用。应从公共卫生的防控角度,检出更多的MS,并进行干预,减少MS的患病危险因素,降低心脑血管疾病和糖尿病等发生的风险。 展开更多
关键词 代谢综合征 患病率 危险因素 交互作用
自噬与细菌相互作用的研究进展
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作者 王亨 钱思竹 +4 位作者 臧浩哲 王建强 毋柯蓉 崔璐莹 李建基 《中国兽医学报》 CAS CSCD 北大核心 2019年第7期1399-1402,1409共5页
细菌感染细胞的过程中,自噬是一把“双刃剑”。一方面,非吞噬细胞内的细菌被自噬体内化、降解,从而有助有感染细菌的清除;另一方面,某些细菌在进化过程中形成了独特的机制来逃避细胞的自噬作用,防止最终被溶酶体所降解,同时利于其在细... 细菌感染细胞的过程中,自噬是一把“双刃剑”。一方面,非吞噬细胞内的细菌被自噬体内化、降解,从而有助有感染细菌的清除;另一方面,某些细菌在进化过程中形成了独特的机制来逃避细胞的自噬作用,防止最终被溶酶体所降解,同时利于其在细胞内复制和存活。本文将自噬与细菌的相互作用进行综述,希望对细菌和自噬相互作用的研究有所帮助。 展开更多
关键词 自噬 细菌 相互作用
ELOVL6基因对成都地区汉族人群大动脉粥样硬化脑梗死发病风险的影响
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作者 柳华 陈小灵 +3 位作者 刘信东 罗丹阳 高励 刘伟 《华西医学》 CAS 2019年第10期1148-1153,共6页
目的探讨ELOVL6基因与成都地区汉族人群大动脉粥样硬化脑梗死(large artery atherosclerosisstroke,LAA)的相关性。方法2015年1月—2017年12月选择成都地区汉族人群为研究对象,采用病例-对照研究,以超长链脂肪酸延伸酶家族成员6(elongas... 目的探讨ELOVL6基因与成都地区汉族人群大动脉粥样硬化脑梗死(large artery atherosclerosisstroke,LAA)的相关性。方法2015年1月—2017年12月选择成都地区汉族人群为研究对象,采用病例-对照研究,以超长链脂肪酸延伸酶家族成员6(elongase of very long chain fatty acids family member 6,ELOVL6)基因6个单核苷酸多态性(single nucleotides polymorphism,SNP)位点(rs3813825、rs17041272、rs4141123、rs9997926、rs6824447和rs12504538)为遗传标记,分析LAA发病与ELOVL6基因的相关性。同时分析病例组和对照人群外周血ELOVL6基因mRNA表达差异。结果共纳入240例LAA患者和211例健康对照人群。rs9997926在所有人群中只有CC基因型,其余5个SNP在所有样本中成功分型。分析发现,rs17041272多态位点与LAA发病显著相关[CC/(CG+GG):比值比(odds ratio,OR)=0.640,95%置信区间(confidence interval,CI)(0.423,0.968),P=0.034)];TGTTG单倍型增加了LAA患病风险[OR=1.776,95%CI(1.069,2.951),P=0.024];rs17041272、rs6824447和血脂异常之间的交互作用增加了LAA的易感性[OR=2.737,95%CI(1.715,4.368),P<0.001];患者外周血ELOVL6 mRNA表达水平更高(t=-3.167,P=0.003)。结论ELOVL6基因可能与成都地区汉族人群LAA发病风险相关。 展开更多
关键词 缺血性脑卒中 大动脉粥样硬化型脑卒中 ELOVL6基因 单核苷酸多态性 交互作用 基因表达
Critical One-Dimensional Absorption-Desorption with Long-Ranged Interaction
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作者 刘小伟 郭竞渊 李志兵 《中国物理快报:英文版》 SCIE CAS CSCD 2019年第8期36-38,共3页
An absorption-desorption model with long-ranged interaction is simulated by the dynamic Monte Carlo method.The dynamic process has an inert phase and an active phase that is controlled by the absorption rate.In the ac... An absorption-desorption model with long-ranged interaction is simulated by the dynamic Monte Carlo method.The dynamic process has an inert phase and an active phase that is controlled by the absorption rate.In the active phase,the number of vacancies increases with time exponentially,while in the inert phase the vacant sites will be occupied by adsorbates rapidly.At the critical absorption rate,both the number of vacancies and the time-depending active probability exhibit power-law behavior.We determine the critical absorption rate and the scaling exponents of the power-laws.The effect of the interaction range of desorption on the critical exponents is investigated.In the short-ranged interaction limit, the critical exponents of Schlogl’s first model are recovered.The model may describe the sta bility of the inner Helmholtz layer,an essential component of the electrochemical double-layer capacitor at a nanowire. 展开更多
关键词 Monte Carlo Absorption-Desorption INTERACTION
Accurate and Robust Eye Center Localization via Fully Convolutional Networks 预览
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作者 Yifan Xia Hui Yu Fei-Yue Wang 《自动化学报:英文版》 CSCD 2019年第5期1127-1138,共12页
Eye center localization is one of the most crucial and basic requirements for some human-computer interaction applications such as eye gaze estimation and eye tracking. There is a large body of works on this topic in ... Eye center localization is one of the most crucial and basic requirements for some human-computer interaction applications such as eye gaze estimation and eye tracking. There is a large body of works on this topic in recent years, but the accuracy still needs to be improved due to challenges in appearance such as the high variability of shapes, lighting conditions, viewing angles and possible occlusions. To address these problems and limitations, we propose a novel approach in this paper for the eye center localization with a fully convolutional network(FCN),which is an end-to-end and pixels-to-pixels network and can locate the eye center accurately. The key idea is to apply the FCN from the object semantic segmentation task to the eye center localization task since the problem of eye center localization can be regarded as a special semantic segmentation problem. We adapt contemporary FCN into a shallow structure with a large kernel convolutional block and transfer their performance from semantic segmentation to the eye center localization task by fine-tuning.Extensive experiments show that the proposed method outperforms the state-of-the-art methods in both accuracy and reliability of eye center localization. The proposed method has achieved a large performance improvement on the most challenging database and it thus provides a promising solution to some challenging applications. 展开更多
关键词 DEEP learning eye CENTER LOCALIZATION eye GAZE estimation eye TRACKING fully convolutional network (FCN) humancomputer interaction
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Petrogenesis of the Late Triassic shoshonitic Shadegai pluton from the northern North China Craton:Implications for crust-mantle interaction and post-collisional extension 预览
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作者 Liqiong Jia Liang Wang +2 位作者 Genhou Wang Shibin Lei Xuan Wu 《地学前缘:英文版》 CAS CSCD 2019年第2期595-610,共16页
Latest Permian to Triassic plutons are widespread in the northern North China Craton(NCC);most of them show calc-alkaline,high-K calc-alkaline,or alkaline geochemical features.The Shadegai pluton in the Wulashan area ... Latest Permian to Triassic plutons are widespread in the northern North China Craton(NCC);most of them show calc-alkaline,high-K calc-alkaline,or alkaline geochemical features.The Shadegai pluton in the Wulashan area has shoshonitic affinity and I-type character,and is composed of syenogranites containing abundant maficmicrogranular enclaves(MMEs).LA-MC-ICP-MS UePb data yieldweightedmean 206Pb/238U ages of 222±1 Ma and 221±1 Ma for the syenogranites and MMEs,respectively,suggesting their coeval formation during the Late Triassic.The syenogranites have high SiO2(70.42-72.30 wt.%),K2O(4.58-5.22 wt.%)and Na2O(4.19-4.43 wt.%)contents but lower concentrations of P2O5(0.073-0.096 wt.%)and TiO2(0.27-0.37 wt.%),and are categorized as I-type granites,rather than A-type granites,as previously thought.These syenogranites exhibit lower(87Sr/86Sr)i ratios(0.70532-0.70547)and strongly negative whole-rockεNd(t)values(-12.54 to-11.86)and zirconεHf(t)values(-17.81 to-10.77),as well as old Nd(1962e2017 Ma)andHf(2023-2092 Ma)model ages,indicating that theywere derived fromthe lower crust.Field and petrological observations reveal that the MMEs within the pluton probably represent magmatic globules commingled with their hostmagmas.Geochemically,theseMMEs have lowSiO2(53.46-55.91wt.%)but high FeOt(7.27-8.79 wt.%)contents.They are enriched in light rare earth elements(LREEs)and large ion lithophile elements(LILEs),and are depleted in heavy rare earth elements(HREEs)and high field strength elements(HFSEs).They have whole-rock(87Sr/86Sr)i ratios varying from 0.70551 to 0.70564,εNd(t)values of-10.63 to-9.82,and zirconεHf(t)values of-9.89 to 0.19.Their geochemical and isotopic features indicate that they were derived from the subcontinental lithospheric mantle mainly metasomatized by slab-derived fluids,with minor involvement of melts generated from the ascending asthenospheric mantle.Petrology integrated with elemental and isotopic geochemistry suggest that the Shadegai pluton was produced by crust-mantle interactions,i.e.,partial 展开更多
关键词 Magma mixing CRUST-MANTLE interaction LITHOSPHERIC delamination POST-COLLISION North China CRATON
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