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维普期刊数据库博看期刊

电网基础设施建设绿色减碳发展路径研究和探索

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建筑科技 2024年第1期8卷 19-22页

作者：陈韻璘王宇超国网浙江省电力有限公司建设分公司浙江杭州310000 浙江华云电力工程设计咨询有限公司浙江杭州310000

积极探索电网建设绿色减碳路径,有助于全方位推动电网建设绿色转型发展。分析电网基础设施建设现状问题及原因,从搭建全过程绿色建造体系,提升电网绿色建造智能化管控水平,创造绿色建造创新示范样板、开展绿色建造试点应用3个方面全面... 详细信息

积极探索电网建设绿色减碳路径,有助于全方位推动电网建设绿色转型发展。分析电网基础设施建设现状问题及原因,从搭建全过程绿色建造体系,提升电网绿色建造智能化管控水平,创造绿色建造创新示范样板、开展绿色建造试点应用3个方面全面探索电网基建绿色减碳发展路径,从而最大限度地提升工程建设资源利用率,减少环境影响,提升工程品质,进一步推动电网工程设计、建设、交付全过程绿色低碳、安全高效发展。

关键词：电网工程绿色减碳碳中和碳排放核算评价体系

Estimation of the desorption energy of dichloromethane and water in MIL-53 by DSC and ab-initio calculations

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Science China Chemistry 2016年第4期59卷 398-404页

作者： Mingyang Wang Xinghua Zhang yunlin chen Ao Zhang Institute of Applied Micro-Nano Materials School of Science Beijing Jiaotong University Science Education Department Beijing Institute of Graphic Communication

Desorption energies of dichloromethane （CH2C12） and water （H20） in a metal-organic framework, MIL-53（A1）, were investi- gated by the combination of experimental （differential scanning calorimeter, DSC） and computational （ab-initio calculations） methods. The differences of desorption energy and natural log of the frequency factor of CH2C12 and H20 in MIL-53（A1） were analyzed by a thermo active process using DSC measurements. The interaction energy of guest molecules with MIL-53（A1）, which corresponds to the desorption in the thermal active process, was explored using ab-initio calculation. As a result of the difference in the interaction energies of H20 and CH2C12 in MIL-53（A1）, the site near the p2-OH groups has two potential wells Both experimentally and computationally, MIL-53 presents the preferential adsorption of CH2C12 than H20.

关键词： metal organic framework desorption energy DSC ab-initio calculation

Noncollinear phase-matching geometries in ultra-broadband quasi-parametric amplification

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Chinese Physics B 2022年第5期31卷 386-397页

作者： Ji Wang Yanqing Zheng yunlin chen Institute of Applied Mic-Nano Materials School of ScienceBeijing Jiaotong UniversityBeijing 100044China School of Materials Science and Chemical Engineering Ningbo UniversityNingbo 315211China

Optical parametric chirped pulse amplification(OPCPA)shows great potential in producing ultrashort high-intensity pulses because of its large gain ***-parametric chirped pulse amplification(QPCPA)may further extend the ***,behavior of QPCPA at a limited pump intensity(e.g.,≤5 GW/cm^(2) in a nanosecond pumped QPCPA)has not yet been investigated *** discuss detailedly the ultra-broadband amplification and the noncollinear phasematching geometry in QPCPA,model and develop a novel noncollinear geometry in QPCPA,namely triple-wavelength phase-matching geometry,which provides two additional phase-matching points around the phase-matching point at the central *** analysis demonstrates that the triple-wavelength phase-matching geometry can support stable,ultra-broadband amplification in *** numerical simulation results show that ultrashort pulse with a pulse duration of 7.92 fs can be achieved in QPCPA when the pump intensity is limited to 5 GW/cm^(2),calculated using the nonlinear coefficient of YCa;O(BO;);.

关键词： quasi-parametric amplification noncollinear phase-matching geometry nonlinear optics ultrafast optics

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广东省天南星科植物新分布种——盾叶半夏

林业科技通讯 2024年第2期 105-106页

作者：钟锦城陈蕴琳罗素娜李镇魁广东陆河南万红锥林省级自然保护区广东汕尾516600 华南农业大学林学与风景园林学院广州510642

报道了广东省天南星科植物新纪录——盾叶半夏(Pinellia peltata Pei)。凭证标本保存在华南农业大学森林植物标本馆(CANT)。盾叶半夏为易危种(VU),中国特有种,原仅分布于我国浙江和福建。新纪录的发现丰富了广东植物多样性,也为其地理... 详细信息

报道了广东省天南星科植物新纪录——盾叶半夏(Pinellia peltata Pei)。凭证标本保存在华南农业大学森林植物标本馆(CANT)。盾叶半夏为易危种(VU),中国特有种,原仅分布于我国浙江和福建。新纪录的发现丰富了广东植物多样性,也为其地理分布研究提供了新资料。

关键词：盾叶半夏 Pinellia peltata Pei 天南星科新纪录广东陆河南万红锥林省级自然保护区

维普期刊数据库博看期刊

Analysis of solar radiation variations over Nanjing region in recent 40 years

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Journal of Geographical Sciences 2003年第1期13卷 97-104页

作者： ZHANG yunlin,QIN Boqiang,chen Weimin(Nanjing Institute of Geography an d Limnology, CAS, Nanjing 210008, China) Nanjing Institute of Geography and Limnology CAS Nanjing 210008

The data utilized in this analysis consisted of extraterrestrial radiation, global radiation, d iffuse radiation, direct radiation, total cloud cover and relative suns hine. The annual variations and trend were analyzed for monthly mean daily total global, direct, and diffuse radiation on a horizontal surface and for the relations between global, direct, diffuse radiation and relative sunshine, tota l cloud cover. The climatological calculation equations of global and d irect radiation are put forward. The results show that global and dir ect radiations are characterized by decrease and diffuse radiation by increase. The main causes are due to the increase of concentration of suspended particles and atmospheric turbidities rather than cloud cover var iations.

关键词： Nanjing region global radiation direct radiation diffuse ra diation relative sunshine

Convolutional neural network for transient grating frequency-resolved optical gating trace retrieval and its algorithm optimization

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Chinese Physics B 2021年第4期30卷 586-590页

作者： Siyuan Xu Xiaoxian Zhu Ji Wang Yuanfeng Li Yitan Gao Kun Zhao Jiangfeng Zhu Dacheng Zhang yunlin chen Zhiyi Wei School of Physics and Optoelectronic Engineering Xidian UniversityXi'an 710071 China Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China Institute of Applied Micro-Nano Materials School of ScienceBeijing Jiaotong UniversityBeijing 100044China Songshan Lake Material Laboratory Dongguan 523808China

A convolutional neural network is employed to retrieve the time-domain envelop and phase of few-cycle femtosecond pulses from transient-grating frequency-resolved optical gating(TG-FROG) *** use theoretically generated TGFROG traces to complete supervised trainings of the convolutional neural networks,then use similarly generated traces not included in the training dataset to test how well the networks are *** retrieval of such traces by the neural network is *** our case,we find that networks with exponential linear unit(ELU) activation function perform better than those with leaky rectified linear unit(LRELU) and scaled exponential linear unit(SELU).Finally,the issues that need to be addressed for the retrieval of experimental data by this method are discussed.

关键词： transient-grating frequency-resolved optical gating convolutional neural network activation function phase retrieval algorithm

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基于Talbot效应的电光调制位相阵列器

红外与激光工程 2014年第11期43卷 3724-3728页

作者：张进宏陈云琳北京交通大学理学院北京100044

利用周期极化反转的铌酸锂晶体设计与制备圆形周期单元六角结构排列的可调位相阵列器,对位相阵列器的Talbot效应光衍射成像进行理论和实验研究,得到了不同位相差和不同分数Talbot距离条件下阵列器近场衍射的理论仿真和实验观测图像,实... 详细信息

利用周期极化反转的铌酸锂晶体设计与制备圆形周期单元六角结构排列的可调位相阵列器,对位相阵列器的Talbot效应光衍射成像进行理论和实验研究,得到了不同位相差和不同分数Talbot距离条件下阵列器近场衍射的理论仿真和实验观测图像,实验结果与理论研究相符。计算衍射场取样区域内平均强度,获得取样区内强度随位相差和Talbot距离变化的曲线,揭示了位相差和衍射位置对阵列器衍射强度分布的影响。

关键词：位相阵列器 Talbot效应铌酸锂电光效应

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畴腐蚀掺镁铌酸锂光分束器的泰伯效应研究

光学学报 2014年第9期34卷 259-264页

作者：范天伟陈云琳北京交通大学理学院北京100044

基于菲涅耳衍射理论分析了畴腐蚀二维周期结构掺镁铌酸锂晶体光分束器的泰伯效应,对光分束器不同占空比D及泰伯分数β条件下的近场光衍射自成像进行了数值模拟研究。设计并制备了不同占空比的畴腐蚀掺镁铌酸锂晶体光分束器,并对其进行... 详细信息

基于菲涅耳衍射理论分析了畴腐蚀二维周期结构掺镁铌酸锂晶体光分束器的泰伯效应,对光分束器不同占空比D及泰伯分数β条件下的近场光衍射自成像进行了数值模拟研究。设计并制备了不同占空比的畴腐蚀掺镁铌酸锂晶体光分束器,并对其进行了分数泰伯光衍射自成像的实验研究,得到了不同泰伯分数β条件下的近场光衍射强度分布。结果表明,当光分束器占空比D=52%、泰伯分数β=2时,近场衍射自成像效果最佳,实验结果与理论研究结果相符。

关键词：光学器件衍射泰伯效应掺镁铌酸锂畴腐蚀光分束器

Study on the Influencing Factors and Mechanisms of the Evolution of the Architectural Characteristics of Guangfu Ancestral Halls in the Ming and Qing Dynasties

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Journal of World Architecture 2024年第1期8卷 83-90页

作者： Yanming chen Sharul Azim Sharudin yunlin Xu Faculty of Creative Industries City University Malaysia46100 Petaling layaSelangorMalaysia College of Forestry and Landscape Architecture South China Agricultural UniversityGuangzhou 510642Guangdong ProvinceChina

This paper discusses ancestral hall architecture within the context of the Cantonese folk lineage in the Pearl River *** a typological research approach and chronological analysis,various factors that have influenced the evolution of ancestral hall architecture are *** study specifically investigates the features of ancestral halls during the Ming and Qing *** periods of ancient China are analyzed:The transition from Ming to Qing,the mid-Qing dynasty,and the late Qing *** variables of each period and how they influence the evolution of architectural typological features are *** on our analysis,architectural features are related to economic and social factors,materials available,and craftsmanship of the construction workers.

关键词： Guangfu ancestral halls Architectural type characteristics Evolutionary influences Evolutionary impact mechanisms