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带状砂沟模式下土壤入渗过程模拟研究

水土保持通报 2024年第2期44卷 22-31页

作者：范严伟梁金宇兰州理工大学能源与动力工程学院甘肃兰州730050

[目的]探究土壤质地类型和砂沟结构参数对土壤入渗过程的影响,为砂沟集雨工程设计、运行和管理提供科学依据。[方法]基于HYDRUS-2D/3D软件,建立带状砂沟模式下土壤水分运动数学模型,利用室内试验验证模拟带状砂沟模式下土壤入渗过程的... 详细信息

[目的]探究土壤质地类型和砂沟结构参数对土壤入渗过程的影响,为砂沟集雨工程设计、运行和管理提供科学依据。[方法]基于HYDRUS-2D/3D软件,建立带状砂沟模式下土壤水分运动数学模型,利用室内试验验证模拟带状砂沟模式下土壤入渗过程的可靠性。在此基础上,模拟分析不同影响因素下带状砂沟模式下土壤累积入渗量和湿润锋运移变化过程。[结果]模拟结果与实测数据无显著性差异且一致性良好,表明所建模型及其求解方法能够有效获取带状砂沟模式下不同时刻土壤累积入渗量和湿润锋运移距离数值;均质土壤填充带状砂沟存在明显的增渗效应。原土质地、砂沟距、砂沟宽和砂沟深均对增渗率有较大影响,增渗率随原土饱和导水率和砂沟距的增大而减小,随砂沟宽和砂沟深的增大而增大;土壤湿润锋轮廓呈下低上高的U形,随时间的延长,U形侧边湿润锋逐渐靠近砂沟交汇面,顶部平台逐渐消失;原土质地对湿润锋运移距离影响较大,湿润体随原土饱和导水率的增大而增大;砂沟深对湿润锋的形态和分布影响较大,随砂沟深度的增大,U字体型垂向拉伸,左侧湿润深度显著增大,右侧湿润深度变化微弱;砂土质地、砂沟距和砂沟宽对湿润锋运移距离影响较小。[结论]带状砂沟土体构型能够显著提高土壤入渗能力,土壤质地类型和砂沟结构参数对土壤累积入渗量和湿润锋运移距离均有不同程度影响。

关键词：带状砂沟增渗湿润锋累积入渗量 HYDRUS-2D/3D

Records of the tsunami induced by the 2010 Chilean earthquake from Xiaoqushan seafloor observatory in the East China Sea

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Chinese Science Bulletin 2011年第27期56卷 2957-2965页

作者： ZHANG yanwei fan DaiDu XU HuiPing State Key Laboratory of Marine Geology Tongji University Shanghai 200092 China

Sea-level variation can be induced by periodic tides, stochastic wind, air pressure, and swell. Larger sea-level variation has the potential to cause coastal disasters. In this paper, real-time continuous data obtained by the Xiaoqushan seafloor observatory in the East China Sea were analyzed employing frequency power spectral and tidal harmonic methods to extract the major components and periodicities of sea-level change. The sea-level anomaly (sla) was calculated by subtracting the tidal components from the observed sea level data. In the study period, the correlation between sla and the local north-south wind speed was high with a correlation coefficient of 0.65 at the 95% confidence level. The local wind-induced sea-level anomaly (sla wind ) was therefore computed through linear fitting. Although sla wind is one of the main components of sla, the residual sea-level anomaly (sla residual ) obtained by subtracting sla wind from sla is not zero, suggesting that there are other factors besides wind. Detailed analysis of the sea-level data at the time of the 8.8-magnitude Chilean earthquake on February 27, 2010 showed a peak sla residual value of 0.48 m at around 15:00 on February 28, which was highly coincident with the tsunami arrival time forecast by the Pacific Tsunami Warning Center. The peak sla residual event is therefore linked with the tsunami induced by the 2010 Chilean earthquake. This is the first time that a tsunami has been detected using real-time continuous data recorded by a seafloor observatory in the sea off China. Such observations are expected to improve tsunami forecast models and promote the development of a tsunami warning system and a seafloor observatory network in the East China Sea.

关键词：海啸预警系统海底观测站中国东海天文台地震智利海平面变化 SLA

Optically stimulated luminescence of Dy^3+-doped NaCaPO4 glass-ceramics

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Journal of Rare Earths 2020年第9期38卷 927-932,I0001页

作者： Jie Xu Zhaoyang Chen Minqiang Gai yanwei fan Chengfa He Key Laboratory of Functional Materials and Devices for Special Environments of CAS Xinjiang Key Laboratory of Electronic Information Materials and DevicesXinjiang Technical Institute of Physics and Chemistry of CASUrumqi 830011China University of Chinese Academy of Sciences Beijing 100049China Laboratory of Solid State Radiation Physics Urumqi 830011China

Dy^3+-doped glass-ceramics containing NaCaPO4 crystals were successfully fabricated by heat treatment at base glass,and the luminescence properties were investigated for potential applications in radiation *** photo luminescence(PL)excitation and emission spectra exhibit transitions related to Dy^3+ions corresponding to the strongest excitation and emission wavelengths at 351 and 575 nm,*** CW-OSL properties as a function of dopant concentration,pre-heating temperature,pre-heating time and signal fading were *** most appropriate Dy^3+ion concentration was found to be 0.25 mol%.The TL glow curves have a broad peak feature peaking at 195±5℃.The fading of the OSL signal would keep stable in five days with the intensity value of about 76.11%.The samples also exhibit good signal reusability and a broad linear dose response range(0.02-1000 Gy).

关键词： Optically stimulated luminescence Glass-ceramics Radiation measurements Photoluminescence Rare earths

不同灌溉防护措施下梭梭根系生物量及形态特征

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生态学报 2024年第16期44卷 7278-7289页

作者：范严伟史金红唐兴鹏李泽林王延祥石雯兰州理工大学能源与动力工程学院兰州730050 兰州有色冶金设计研究院有限公司兰州730000 平凉市基础产业投资集团有限公司平凉744000

梭梭是防风固沙和改善生态环境的先锋树种,但在种植过程中存在成活率偏低和生长缓慢的瓶颈问题,科学合理的灌溉防护是保障梭梭幼苗成活并健康生长的关键。多年来,关于梭梭灌溉防护技术的研究主要集中在单一的灌溉方法或防护措施上,对于... 详细信息

梭梭是防风固沙和改善生态环境的先锋树种,但在种植过程中存在成活率偏低和生长缓慢的瓶颈问题,科学合理的灌溉防护是保障梭梭幼苗成活并健康生长的关键。多年来,关于梭梭灌溉防护技术的研究主要集中在单一的灌溉方法或防护措施上,对于多种灌溉防护措施的综合比较和差异分析缺乏足够认识,这在一定程度上制约了人们对灌溉防护措施的优化选择和合理应用。鉴于此,设置了4种灌溉防护措施:传统地表滴灌(TSDI)、无灌溉竖管防护(NIPP)、竖管地表滴灌(PSDI)和无灌溉无防护(NINP),通过野外筒栽试验,比较了不同措施下土壤水分分布及梭梭幼苗成活率的差异,分析了不同措施及竖管参数(管径和埋深)组合下梭梭根系性状特征。结果表明,4种措施下土壤水分均随深度的增大而增大,同一时期相同深度处土壤含水率大小表现出PSDI>NIPP>TSDI>NINP的规律;移栽1年后,梭梭在不同措施下其成活率存在显著差异,PSDI措施下的成活率最高,达到88.9%,NINP措施下的成活率最低,仅为11.1%,而NIPP和TSDI措施下的成活率介于PSDI和NINP之间,分别为81.5%和44.4%;4种灌溉防护措施中,PSDI的梭梭根系生物量、主根增长量及各形态指标(总根长、总根表面积、总根体积、根平均直径和根尖数)均为最大值,NIPP的根系生物量、主根增长量及各形态指标优于TSDI但不及PSDI,而NINP措施的均为最小值;PSDI措施下竖管参数对梭梭根系的生长有显著影响(P<0.05),相同管径时,根系生物量、主根增长量及根系形态指标均随埋深的增大呈先增大后减小的趋势,根冠比则呈先减小后增大的规律;同一埋深时,根系生物量、主根增长量及根系形态指标均随管径的增大而增大,而根冠比则随管径的增大而减小。综合分析,4种措施下PSDI措施最有利于1年生梭梭根系的生长发育,3种管径(9、11 cm和16 cm)和埋深(10、15 cm和20 cm)下竖管参数最优组合为管径16 cm、埋深15 cm。

关键词：梭梭(Haloxylon ammodendron) 竖管地表滴灌根系生物量,形态指标竖管参数

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Synthesis and optical properties of novel Gd^(3+)-doped BaZn_(2)(PO_(4))_(2)glass-ceramics for radiation detection applications

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Journal of Rare Earths 2022年第12期40卷 1927-1934,I0005页

作者： Wanli Li Zhaoyang Chen Jie Xu Pengjun Zhao yanwei fan Chengfa He Key Laboratory of Functional Materials and Devices for Special Environments of CAS Xinjiang Key Laboratory of Electronic Information Materials and DevicesXinjiang Technical Institute of Physics&Chemistry of CASUrumqi 830011China University of Chinese Academy of Sciences Beijing 100049China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Laboratory of Solid-State Radiation Physics Urumqi 830011China

45 P_(2)O_(5)-15 BaO-25 ZnO-15 B2O_(3)glasses doped with different concentrations(0 mol%,0.1 mol%,0.25 mol%,0.5 mol%,and 0.75 mol%)of Gd^(3+)were prepared by a melt-quenching method and treated to fabricate glass-ceramics containing BaZn_(2)(PO_(4))_(2)crystals by controllable *** structural,optical,and dosimetric properties were *** spectra indicate that the glasses are composed of[PO_(4)],[BO_(3)],and[BO_(4)]basic structural *** XRD pattern analysis indicates that the samples contain BaZn_(2)(PO_(4))_(2)*** the photoluminesce nce(PL)spectra,two emission bands are observed at 307 and 313 nm due to the^(6)P_(5/2)→^(8)S_(7/2)and^(6)P_(7/2)→^(8)S_(7/2)transitions of Gd^(3+),*** OSL dosimetric properties of glass-ceramics were studied further under beta radiation *** optimal Gd^(3+)doping concentration of 0.5 mol%was *** fading of the OSL signal shows that the CW-OSL signal of Gd^(3+)-doped BaZn_(2)(PO_(4))_(2)glass-ceramics decays by about 58.95%within120 h,and the intensity remains stable *** thermoluminescence(TL)curve has three peaks at 164,240,and 344℃.Minimum detectable dose(MDD)of the 0.5 mol%Gd^(3+)-doped BaZn_(2)(PO_(4))_(2)glass-ceramics was calculated as 0.675 *** samples also exhibit good signal reusability and a broad linear dose-response range(0.3-500 Gy).Results show the excellent dosimetric properties of Gd^(3+)-doped BaZn_(2)(PO_(4))_(2)glass-ceramics and their potential application in radiation dosimetry.

关键词： Glass-ceramics Photoluminescence Continuous wave-optically stimulated luminescence Thermoluminescence Radiation dosimetry Rare earths

A CaS:Ce,Sm-based dosimeter for online dosimetry measurement

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Nuclear Science and Techniques 2011年第2期22卷 84-88页

作者： SUN Yurun CHEN Zhaoyang fan yanwei YAN Shiyou HE Chengfa Xinjiang Technical Institute of Physics and Chemistry Chinese Academy of Sciences Urumqi 830011 China Xinjiang Key Laboratory of Electronic information Materials and Devices Urumqi 830011 China Graduate University of Chinese Academy of Sciences Beijing 100049 China

A film dosimeter based on optically stimulated luminescence (OSL) material of CaS:Ce,Sm was developed for online irradiation dosimetry *** stimulation is provided by a laser with a wavelength of 980 nm,and the OSL luminescenceis collected by a *** 60Co γ-rays,we investigated the dosimetry characteristic of the dosimeter at different dose rates and total *** real-time detection results showed that the OSL signals versus total ionizing dose exhibited a good linearity in a dose range of 0.1-185 Gy.

关键词：剂量测量物质基础剂量计 CAS 铈钐中国科学院光电二极管

Optically stimulated luminescence dosimeter based on CaS:Eu,Sm

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Nuclear Science and Techniques 2008年第2期19卷 113-116页

作者： LIU Yanping CHEN Zhaoyang BA Weizhen fan yanwei GUO Qi YU Xuefeng CHANG Aiming LU Wu DU Yanzhao Xinjiang Technical Institute of Physics ＆ Chemistry Chinese Academy of Sciences Urumchi 830011 China Graduate University of Chinese Academy of Sciences Beijing 100049 China

Alkaline earth sulfides (MgS,CaS and BaS) crystal doped with rare-earth ions is an optically stimulated luminescence dosimeter with very high sensitivity,short time constant of the optically stimulated luminescence (OSL) separated perfectly from the *** this paper,an OSL dosimeter is *** has linear dose response from 0.01 to 1000 *** equipment,relatively simple and small in size is promising for applications in space exploration and for high dose irradiation and dangerous irradiation conditions.

关键词：刺激性发光辐射检测辐射放射量测定器铕钐

Atomic layer deposition in advanced display technologies:from photoluminescence to encapsulation

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International Journal of Extreme Manufacturing 2024年第2期6卷 65-82页

作者： Rong Chen Kun Cao yanwei Wen fan Yang Jian Wang Xiao Liu Bin Shan State Key Laboratory of Intelligent Manufacturing Equipment and Technology School of Mechanical Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074HubeiPeople’s Republic of China State Key Laboratory of Materials Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074HubeiPeople’s Republic of China

Driven by the growing demand for next-generation displays,the development of advanced luminescent materials with exceptional photoelectric properties is rapidly accelerating,with such materials including quantum dots and phosphors,***,the primary challenge preventing the practical application of these luminescent materials lies in meeting the required durability *** layer deposition(ALD)has,therefore,been employed to stabilize luminescent materials,and as a result,flexible display devices have been fabricated through material modification,surface and interface engineering,encapsulation,cross-scale manufacturing,and *** addition,the appropriate equipment has been developed for both spatial ALD and fluidized ALD to satisfy the low-cost,high-efficiency,and high-reliability manufacturing *** strategic approach establishes the groundwork for the development of ultra-stable luminescent materials,highly efficient light-emitting diodes(LEDs),and thin-film ***,this significantly enhances their potential applicability in LED illumination and backlighted displays,marking a notable advancement in the display industry.

关键词： atomic layer deposition display luminescent encapsulation

A robust indium-organic framework with open tubular channels for efficient separation of acetylene

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Nano Research 2024年第4期17卷 3139-3146页

作者： Yong-Zhi Li Gang-Ding Wang fan Xu Qing Yin Danyang Zhao Jiqiu Qi yanwei Sui Lei Hou Yao-Yu Wang School of Materials and Physics China University of Mining and TechnologyXuzhou 221116China Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education Shaanxi Key Laboratory of Physico-Inorganic ChemistryCollege of Chemistry&Materials ScienceNorthwest UniversityXi’an 710069China

Considering the tremendous applications and purification requirement of acetylene(C_(2)H_(2)),seeking appropriate adsorbents with high capacity and selectivity is a vital task and remains an enduring ***,we designed and synthesized a robust three-dimensional(3D)indium-organic framework([(Me)_(2)NH_(2)][In(L6)_(0.5)(IPA)_(0.5)]·DMA·2H_(2)O(In-L6-IPA,DMA=dimethylammonium,IPA=isopropyl alcohol))featuring two types of one-dimensional(1D)tubular *** activated In-L6-IPA displayed high loading for C_(2)H_(2)(104.4 cm^(3)·g^(-1),the second highest value among all reported indium-based metal-organic frameworks(MOFs))and simultaneously selective adsorption for C_(2)H_(2) over CO_(2),C_(2)H_(6),and ethylene(C_(2)H_(4))at 298 K under 100 *** modelling revealed that the porous wall of In-L6-IPA provides more and stronger multiple interactions for C_(2)H_(2) than CO_(2),C_(2)H_(6),and C_(2)H_(4) containing C–H···π,C–H···O,and O···π*** experiments validated the actual separation ability for various ratios of binary C_(2)H_(2)/C_(2)H_(4) and C_(2)H_(2)/CO_(2) mixtures as well as equimolar ternary C_(2)H_(2)/C_(2)H_(4)/CO_(2) and C_(2)H_(2)/C_(2)H_(4)/C_(2)H_(6) mixtures with excellent reusability.

关键词： indium-organic framework crystal structure gas adsorption acetylene(C_(2)H_(2))separation