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应用RUGⅢ对脑梗塞康复病例试行分类的研究 被引量:7
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作者 姚瑾 刘松筠 +2 位作者 党雅君 刘桂芬 王万斌 《中国康复理论与实践》 CSCD 1996年第4期171-175,共5页
采用RUGⅢ这一新的慢性病例分类模式,对我院75例脑梗塞康复患者试行分类,结果表明,RUGⅢ能比较客观地反映康复医疗的全面成本,可表明费用支付的合理性。同时,探讨了RUGⅢ对疗养、家庭病床、临终护理等机构的费用管理的... 采用RUGⅢ这一新的慢性病例分类模式,对我院75例脑梗塞康复患者试行分类,结果表明,RUGⅢ能比较客观地反映康复医疗的全面成本,可表明费用支付的合理性。同时,探讨了RUGⅢ对疗养、家庭病床、临终护理等机构的费用管理的意义。 展开更多
关键词 脑梗塞 康复 rug 病例分类
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Distributed modeling of direct solar radiation on rugged terrain of the Yellow River Basin 被引量:4
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作者 ZENG Yan QIU Xinfa +1 位作者 LIU Changming JIANG Aijun 《Journal of Geographical Sciences》 SCIE CSCD 2005年第4期439-447,共9页
Due to the influences of local topographical factors and terrain inter-shielding, calculation of direct solar radiation (DSR) quantity of rugged terrain is very complex. Based on digital elevation model (DEM) data... Due to the influences of local topographical factors and terrain inter-shielding, calculation of direct solar radiation (DSR) quantity of rugged terrain is very complex. Based on digital elevation model (DEM) data and meteorological observations, a distributed model for calculating DSR over rugged terrain is developed. This model gives an all-sided consideration on factors influencing th a resolution of 1 km × 1 km for thDSR. Using the developed model, normals of annual DSR quantity wie Yellow River Basin was generated, with DEM data as the general characterization of terrain. Characteristics of DSR quantity influenced by geographic and topographic factors over rugged terrain were analyzed thoroughly. Results suggest that: influenced by local topographic factors, i.e. azimuth, slope and so on, and annual DSR quantity over mountainous area has a clear spatial difference; annual DSR quantity of sunny slope (or southern slope) of mountains is obviously larger than that of shady slope (or northern slope). The calculated DSR quantity of the Yellow River Basin is provided in the same way as other kinds of spatial information and can be employed as basic geographic data for relevant studies as well. 展开更多
关键词 direct solar radiation (DSR) rugged terrain digital elevation model (DEM) distributed model Yellow River Basin
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RUGⅢ:一种新的支付医疗费用的慢性病例分类模式 被引量:2
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作者 张宝库 侯延武 +3 位作者 王桂玲 栾淑珍 赵瑞 卢国华 《中国卫生事业管理》 1994年第10期528-531,共4页
RUGⅢ:一种新的支付医疗费用的慢性病例分类模式中国医院管理杂志社(150036)张宝库,侯延武,王桂玲黑龙江省医院栾淑珍中国卫生信息报社赵瑞兴隆林业局第二职工医院卢国华在医疗保险和社会福利制度中,设计能合理补偿供给... RUGⅢ:一种新的支付医疗费用的慢性病例分类模式中国医院管理杂志社(150036)张宝库,侯延武,王桂玲黑龙江省医院栾淑珍中国卫生信息报社赵瑞兴隆林业局第二职工医院卢国华在医疗保险和社会福利制度中,设计能合理补偿供给医疗服务所需成本的医疗费用支付方式... 展开更多
关键词 医院改革 医疗制度 医疗费用 rug
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Core-Germplasm Construction of <i>Rosa rugosa</i>Collections by CDDP Molecular Markers 被引量:2
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作者 Liyuan Jiang Dekui Zang 《Open Journal of Applied Sciences》 2017年第11期635-645,共11页
A method for constructing core-germplasm of Rosa rugosa in China based on molecular marker data was probed and the optimum core germplasm was established. Studies were initiated to analyze the genetic diversity of 120... A method for constructing core-germplasm of Rosa rugosa in China based on molecular marker data was probed and the optimum core germplasm was established. Studies were initiated to analyze the genetic diversity of 120 rugged roses from 6 different Chinese source populations based on CDDP marker, and a preliminary construction of the core collection was established using stepwise UPGMA clustering sampling method. The 26 core collection resources of R. rugosa collections in China have 20% germplasm samples of initial collection, the retention ratio of polymorphic loci, effective number of alleles (Ne), Nei’s genetic diversity (H) and Shannon information index (I) were respectively 97.52%, 104.16%, 108.38% and 106.18%. The results of t-test showed that no significant difference was found in genetic diversity indexes between the core collection and the original collection. These results also demonstrated that the core collection could stand for original collection excellently. The results show that CDDP molecular technology can be successfully applied to the construction of core germplasm resources of rugged roses. 展开更多
关键词 rugged Rose in China CDDP Markers Genetic Diversity CORE Collection
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Application of Gaussian beam pre-stack depth migration in rugged seabed
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作者 HAN Fuxing YI Xin +3 位作者 SUN Zhangqing HU Jia XU Baoyin XU Hai 《Global Geology》 2021年第2期119-128,共10页
Strong fluctuation of seabed,abrupt variation in depth and dip of seabed bring seismic imaging problems,such as irregular reflection waves,obvious multiple waves,serious lateral wave development,poor imaging on base s... Strong fluctuation of seabed,abrupt variation in depth and dip of seabed bring seismic imaging problems,such as irregular reflection waves,obvious multiple waves,serious lateral wave development,poor imaging on base surface and depression structure,low signal-to-noise ratio of middle and deep layers.In this paper,Gaussian beam migration imaging method is used to analyze the imaging effect of rugged seabed in deep water area,and the ray tracing method of wavefront construction method is used to analyze the kinematic characteristics of seismic waves.By improving the design of seismic data acquisition and observation system,imaging quality of fine structures is improved. 展开更多
关键词 Gaussian beam migration wavefront construction method Gaussian beam pre-stack depth rugged seabed
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户外爱好者挚爱 Lacia Rugged XL移动硬盘
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《数码》 2009年第5期34-34,共1页
不管做什么都讲究专业.哪怕是移动硬盘这样的小东西。对于户外爱好者和探险家来说.拥有一款可以和JEEP媲美的移动硬盘同样重要。它必须拥有结实的外表.舒适的使用环境,超强的速度体验.能够克服任何恶劣的环境,它就是来自法国莱希L... 不管做什么都讲究专业.哪怕是移动硬盘这样的小东西。对于户外爱好者和探险家来说.拥有一款可以和JEEP媲美的移动硬盘同样重要。它必须拥有结实的外表.舒适的使用环境,超强的速度体验.能够克服任何恶劣的环境,它就是来自法国莱希Lacie的移动硬盘Rugged XL——探路者。 展开更多
关键词 移动硬盘 使用环境 Lacia rugged XL
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Stanton Rug公司推出家用系列地毯
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《纺织装饰科技》 2003年第4期27-27,共1页
在今年7月13日至16日的亚特兰大国际区域地毯展上,Stanton Rug公司介绍了一种配套家用系列区域地毯,它是长方形,阔幅的地毯,图案设计是新颖的。据国家地毯销售经理Mike Shupp讲:'我们的配套地毯产品的推出是非常成功的,它将满足各... 在今年7月13日至16日的亚特兰大国际区域地毯展上,Stanton Rug公司介绍了一种配套家用系列区域地毯,它是长方形,阔幅的地毯,图案设计是新颖的。据国家地毯销售经理Mike Shupp讲:'我们的配套地毯产品的推出是非常成功的,它将满足各种不同的需要'。 Stanton公司新设计地毯Royal Sovereign系列中包括下列几个名称的地毯: Anastasia:是100%新西兰羊毛地毯,有两种色彩:深暗蓝色及紫红色,地毯的尺寸有:5′×8′,8′×10′,10′×13′及2′6″×8′的长形地毯。 Catherine:是100%新西兰羊毛。 展开更多
关键词 Stanton rug公司 家用系列地毯 产品设计 Anastasia Catherine 产品规格
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Distributed Modeling of Extraterrestrial Solar Radiation Over the Rugged Terrains of Pakistan 被引量:3
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作者 Romana AMBREEN QIU Xinfa Iftikhar AHMAD 《Journal of Mountain Science》 SCIE CSCD 2011年第3期427-436,共10页
In Pakistan,the solar analogue has been addressed but its surface geographical parameterization has given least attention.Inappropriate density of stations and their spatial coverage particularly in difficult peripher... In Pakistan,the solar analogue has been addressed but its surface geographical parameterization has given least attention.Inappropriate density of stations and their spatial coverage particularly in difficult peripheral national territories,little or no solar radiation data,non-satisfactory sunshine hours data,and low quality of ground observed cloud cover data create a situation in which the spatial modeling of Extraterrestrial Solar Radiation(ESR) and its ground parameterization got sufficient scope.The Digital Elevation Model (DEM) input into Geographic Information System (GIS) is a compatible tool to demonstrate the spatial distribution of ESR over the rugged terrains of the study domain.For the first time,distributed modeling of ESR is done over the rugged terrains of Pakistan,based on DEM and ArcGIS..Results clearly depict that the complex landforms profoundly disrupt the zonal distribution of ESR in Pakistan.The screening impact of topography is higher on spatial distribution of ESR in winter and considerably low in summer.The combined effect of topography and latitude is obvious.Hence,the model was further testified by plotting Rb (ratio of ESR quantity over rugged terrain against plane surface) against azimuth at different latitudes with different angled slopes.The results clearly support the strong screening effect of rugged terrain through out the country especially in Himalayas,Karakoram and Hindukush (HKH),western border mountains and Balochistan Plateau.This model can be instrumental as baseline geospatial information for scientific investigations in Pakistan,where substantial fraction of national population is living in mountainous regions. 展开更多
关键词 崎岖地形 巴基斯坦 分布式建模 天文辐射 数字高程模型 地理信息系统 ARCGIS 地理空间信息
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改良QuEChERS技术结合超高效液相色谱-串联质谱法测定水产品中扑草净及其代谢物残留
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作者 彭婕 穆迎春 +4 位作者 喻亚丽 陈建武 刘婷 何力 甘金华 《食品科学》 EI CAS CSCD 北大核心 2024年第3期185-192,共8页
采用改良QuEChERS技术作为前处理方法,建立了水产品中扑草净及其代谢物残留的超高效液相色谱-串联质谱分析方法。样品用乙腈提取,经增强型脂质去除吸附剂与Cleanert LipoNo组合净化,采用选择反应监测正离子模式测定,内标法定量。结果表... 采用改良QuEChERS技术作为前处理方法,建立了水产品中扑草净及其代谢物残留的超高效液相色谱-串联质谱分析方法。样品用乙腈提取,经增强型脂质去除吸附剂与Cleanert LipoNo组合净化,采用选择反应监测正离子模式测定,内标法定量。结果表明:扑草净及其代谢物在1.0~500 ng/mL质量浓度范围内线性关系良好,确定系数R2大于0.992,方法检出限和定量限分别低至0.20μg/kg和0.50μg/kg,在草鱼、克氏原螯虾和中华绒螯蟹等基质的加标实验中呈现良好的准确度与精密度,平均加标回收率和相对标准偏差分别为74.4%~113.7%和3.17%~11.47%。经内标法校正,5种扑草净及其代谢物在不同水产品中的基质效应不明显。方法实现了水产品中扑草净及其代谢物的识别与定量分析,并通过检测药浴扑草净的克氏原螯虾阳性样品验证了方法的适用性。 展开更多
关键词 超高效液相色谱-串联质谱 水产品 扑草净 代谢物 QUECHERS
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食品中季铵盐类消毒剂检测方法建立及北京市市售食品及膳食样品中含量分析
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作者 谢昀 周伟娥 +2 位作者 许秀丽 张晶 张峰 《食品科学》 EI CAS CSCD 北大核心 2024年第6期261-270,共10页
建立了一种基于超高效液相色谱-串联质谱检测蔬菜、水果、水产等多种食品基质中9种常用季铵盐类消毒剂的分析方法。样品采用改良的QuEChERS(Quick、Easy、Cheap、Effective、Rugged、Safe)法净化,BEH C_(18)色谱柱(100 mm×3.0 mm,... 建立了一种基于超高效液相色谱-串联质谱检测蔬菜、水果、水产等多种食品基质中9种常用季铵盐类消毒剂的分析方法。样品采用改良的QuEChERS(Quick、Easy、Cheap、Effective、Rugged、Safe)法净化,BEH C_(18)色谱柱(100 mm×3.0 mm,1.7μm)分离,电喷雾电离质谱正离子模式下分析。方法学考察结果表明,蔬菜、水果、水产中9种季铵盐的检出限为0.2~5.0μg/kg,定量限为1.0~10.0μg/kg,在各自的检测范围内有良好的线性关系(R^(2)>0.99),平均回收率为65.24%~118.63%,相对标准偏差为0.19%~6.77%。使用本方法检测北京市市售食品季铵盐含量,阳性样品检出率为30.43%;检测北京市膳食样品季铵盐含量,阳性样品检出率为12%,膳食摄入风险在可接受范围内。 展开更多
关键词 季铵盐类消毒剂 QUECHERS 超高效液相色谱-串联质谱法 膳食摄入 食品安全
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Distributed modeling of monthly air temperatures over the rugged terrain of the Yellow River Basin 被引量:11
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作者 ZENG Yan QIU XinFa +2 位作者 HE YongJian SHI GuoPing LIU ChangMing 《Science China Earth Sciences》 SCIE EI CAS 2009年第5期694-707,共14页
Our analyses of the monthly mean air temperature of meteorological stations show that altitude,global solar radiation and surface effective radiation have a significant impact on air temperature.We set up a physically... Our analyses of the monthly mean air temperature of meteorological stations show that altitude,global solar radiation and surface effective radiation have a significant impact on air temperature.We set up a physically-based empirical model for monthly air temperature simulation.Combined the proposed model with the distributed modeling results of global solar radiation and routine meteorological observation data,we also developed a method for the distributed simulation of monthly air temperatures over rugged terrain.Spatial distribution maps are generated at a resolution of 1 km×1 km for the monthly mean,the monthly mean maximum and the monthly mean minimum air temperatures for the Yellow River Basin.Analysis shows that the simulation results reflect to a considerable extent the macro and local distribution characteristics of air temperature.Cross-validation shows that the proposed model displays good stability with mean absolute bias errors of 0.19℃-0.35℃.Tests carried out on local meteorological station data and case year data show that the model has good spatial and temporal simulation capacity.The proposed model solely uses routine meteorological data and can be applied easily to other regions. 展开更多
关键词 YELLOW RIVER BASIN MONTHLY mean air temperature rugged TERRAIN DISTRIBUTED modeling
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Modeling the land surface reflectance for optical remote sensing data in rugged terrain 被引量:11
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作者 WEN JianGuang LIU QinHuo +2 位作者 XIAO Qing LIU Qiang LI XiaoWen 《Science China Earth Sciences》 SCIE EI CAS 2008年第8期1169-1178,共10页
A model for topographic correction and land surface reflectance estimation for optical remote sensing data in rugged terrian is presented.Considering a directional-directional reflectance that is used for direct solar... A model for topographic correction and land surface reflectance estimation for optical remote sensing data in rugged terrian is presented.Considering a directional-directional reflectance that is used for direct solar irradiance correction and a hemispheric-directional reflectance that is used for atmospheric diffuse irradiance and terrain background reflected irradiance correction respectively,the directional reflectance-based model for topographic effects removing and land surface reflectance calculation is developed by deducing the directional reflectance with topographic effects and using a radiative transfer model.A canopy reflectance simulated by GOMS model and Landsat/TM raw data covering Jiangxi rugged area were taken to validate the performance of the model presented in the paper.The validation results show that the model presented here has a remarkable ability to correct topography and estimate land surface reflectance and also provides a technique method for sequently quantitative remote sensing application in terrain area. 展开更多
关键词 BIDIRECTIONAL reflectance topographic/atmospheric correction sky DIFFUSE IRRADIANCE ADJACENT terrain-reflected IRRADIANCE rugged area
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Plane-Wave Least-Squares Reverse Time Migration for Rugged Topography 被引量:6
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作者 Jianping Huang Chuang Li +1 位作者 Rongrong Wang Qingyang Li 《Journal of Earth Science》 SCIE CAS CSCD 2015年第4期471-480,共10页
We present a method based on least-squares reverse time migration with plane-wave encoding (P-LSRTM) for rugged topography. Instead of modifying the wave field before migration, we modify the plane-wave encoding fun... We present a method based on least-squares reverse time migration with plane-wave encoding (P-LSRTM) for rugged topography. Instead of modifying the wave field before migration, we modify the plane-wave encoding function and fill constant velocity to the area above rugged topography in the model so that P-LSRTM can be directly performed from rugged surface in the way same to shot domain reverse time migration. In order to improve efficiency and reduce I/O (input/output) cost, the dynamic en- coding strategy and hybrid encoding strategy are implemented. Numerical test on SEG rugged topography model show that P-LSRTM can suppress migration artifacts in the migration image, and compensate am- plitude in the middle-deep part efficiently. Without data correction, P-LSRTM can produce a satisfying image of near-surface if we could get an accurate near-surface velocity model. Moreover, the pre-stack P- LSRTM is more robust than conventional RTM in the presence of migration velocity errors. 展开更多
关键词 least-squares migration rugged topography plane-wave encoding dynamic encoding hybrid encoding.
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复杂地形瞬变电磁三维正演模拟与地形效应分析
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作者 屈少波 朱姣 +2 位作者 姜志海 李毛飞 何治隆 《煤田地质与勘探》 EI CAS CSCD 北大核心 2024年第4期137-151,共15页
目前,地面瞬变电磁法凭借其优势已被广泛用于煤矿水文地质勘查中,然而,在野外实际勘探中,复杂地形环境常导致发射源几何形状的改变与信号接收偏差,降低了勘探精度。为此,采用理论分析、数值模拟和实际地形数据分析相结合的方式,系统研... 目前,地面瞬变电磁法凭借其优势已被广泛用于煤矿水文地质勘查中,然而,在野外实际勘探中,复杂地形环境常导致发射源几何形状的改变与信号接收偏差,降低了勘探精度。为此,采用理论分析、数值模拟和实际地形数据分析相结合的方式,系统研究了复杂地形条件下电性源与磁性源瞬变电磁场的响应特征。首先,基于二阶后退欧拉离散的矢量有限元正演模拟技术,详细探讨了山峰和山谷地形位于接收点和发射源位置时,对两种源系统的影响规律。结果表明:电性源系统会出现响应变号现象,源导线位置高于周围地形时响应增强,反之则被削弱;而磁性源无变号现象,但响应变化规律与电性源类似。其次,利用实测地形数据,采用四面体网格建立与实际地形高度吻合的三维正演模型。模拟结果显示:早期响应曲线能够清晰反映地形细节,曲线形态与地形特征一致;而晚期响应则逐渐趋于平缓,体现了深部背景的影响。研究成果可为复杂地形条件下瞬变电磁法的勘探装置布设、数据采集、处理和解释提供理论指导,对提高煤矿水文地质勘探精度具有重要意义。 展开更多
关键词 瞬变电磁法 起伏地形 有限元正演 数值模拟 电性源 磁性源
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加固液晶显示器电磁脉冲防护设计
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作者 赵钱 唐远见 沈骝 《光电子技术》 CAS 2024年第1期25-28,共4页
将加固液晶显示器的电磁脉冲防护作为一项系统工程,从元器件级、组件级、设备级三个层级分别提出电磁脉冲防护设计措施。通过试验验证,证明各层级的电磁脉冲防护设计可以保证加固液晶显示器在复杂电磁脉冲环境下的生存能力,完成任务使命。
关键词 加固液晶显示器 电磁脉冲 防护设计
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超高效液相色谱-串联质谱法测定调节三高类保健食品中59种非法添加药物
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作者 邵瑞婷 丁学妍 姜洁 《食品科学》 EI CAS CSCD 北大核心 2024年第9期232-242,共11页
本实验建立了调节三高类保健食品中59种非法添加药物的超高效液相色谱-串联质谱检测方法。样品经甲醇提取,QuEChERS净化,氮吹至近干,1 mL 40%甲醇溶液(体积分数)复溶,以乙腈和0.1%甲酸溶液(5 mmol/L乙酸铵)为流动相,经ACQUITY UPLC HSS... 本实验建立了调节三高类保健食品中59种非法添加药物的超高效液相色谱-串联质谱检测方法。样品经甲醇提取,QuEChERS净化,氮吹至近干,1 mL 40%甲醇溶液(体积分数)复溶,以乙腈和0.1%甲酸溶液(5 mmol/L乙酸铵)为流动相,经ACQUITY UPLC HSS T3反相柱梯度分离,超高效液相色谱-串联质谱在正、负离子模式下多反应监测,采用基质外标法定量。结果表明:59种非法添加药物在线性范围内,决定系数(R^(2))均大于0.980,回收率在60.2%~119.5%之间,相对标准偏差在1.2%~15.0%之间。该方法具有前处理较简单、分析时间较短、灵敏度好、准确度高、杂质干扰小等特点,可以用于调节三高类保健食品中多种非法添加药物的检测。 展开更多
关键词 调节三高类保健食品 QuEChERS净化 超高效液相色谱-串联质谱 非法添加药物
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The glutamate metabotropic receptor 5(GRM5)gene is associated with beef cattle home range and movement tortuosity 被引量:1
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作者 Cristian A.Moreno Garcia Huitong Zhou +5 位作者 David Altimira Robyn Dynes Pablo Gregorini Sadeepa Jayathunga Thomas M.R.Maxwell Jonathan Hickford 《Journal of Animal Science and Biotechnology》 SCIE CAS CSCD 2023年第1期72-87,共16页
Background:The grazing behaviour of herbivores and their grazing personalities might in part be determined genetically,but there are few studies in beef cattle illustrating this.In this study,we investigated for first... Background:The grazing behaviour of herbivores and their grazing personalities might in part be determined genetically,but there are few studies in beef cattle illustrating this.In this study,we investigated for first time the genetic variation within a candidate‘grazing gene',the glutamate metabotropic receptor 5 gene(GRM5),and tested associations between variation in that gene and variation in grazing personality behaviours(GP-behaviours)displayed by free-ranging cows during winter grazing in the steep and rugged rangelands of New Zealand.Mature beef cows(n=303,from 3 to 10 years of age)were tracked with global positioning system(GPS)and,with 5-minutes(min)relocation frequency,various GP-behaviours were calculated.These included horizontal and vertical distances travelled,mean elevation,elevation range,elevation gain,slope,home range and movement tortuosity,variously calculated using daily relocation trajectories with repeated measurements(i.e.,7 to 24 days(d))and satellite-derived digital elevation models(DEM).The different GP-behaviours were fitted into mixed models to ascertain their associations with variant sequences and genotypes of GRM5.Results:We discovered three GRM5 variants(A,B and C)and identified the six possible genotypes in the cattle studied.The mixed models revealed that A was significantly associated with elevation range,home range and movement tortuosity.Similarly,GRM5 genotypes were associated(P<0.05)to home range and movement tortuosity,while trends suggesting association(P<0.1)were also revealed for elevation range and horizontal distance travelled.Most GP-behaviour models were improved by correcting for cow age-class as a fixed factor.The analysis of GP-behaviours averaged per cow age-class suggests that grazing personality is fully established as beef cows reached 4 years of age.Home range and movement tortuosity were not only associated with GRM5 variation,but also negatively correlated with each other(r=-0.27,P<0.001).Conclusions:There seems to be a genetically determined trade-off between home range and movement tortuosity that may be useful in beef cattle breeding programmes aiming to improve the grazing distribution and utilisation of steep and rugged rangelands. 展开更多
关键词 Animal personality Breeding programmes Genetic associations Grazing distribution Grazing patterns Steep and rugged terrain
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考虑地表起伏的不规则区域重力梯度场模型构建方法——以云南地区为例
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作者 刘金钊 梁星辉 +8 位作者 叶周润 陈兆辉 胡敏章 韩宇飞 王青华 刘东 郝洪涛 张双喜 陈铭 《地震地质》 EI CSCD 北大核心 2023年第5期1129-1146,共18页
文中推导并给出了基于非格网分布的起伏面扰动重力或重力异常解算区域扰动重力梯度场模型的数值计算公式。基于澳大利亚West Arnhem Land地区的格网重力数据,以频谱域(二维快速傅里叶变换)解算的扰动重力梯度全张量作为“基准值”,然后... 文中推导并给出了基于非格网分布的起伏面扰动重力或重力异常解算区域扰动重力梯度场模型的数值计算公式。基于澳大利亚West Arnhem Land地区的格网重力数据,以频谱域(二维快速傅里叶变换)解算的扰动重力梯度全张量作为“基准值”,然后利用基于推导公式的最小二乘配置方法(LSC)对相同区域非规则范围的重力数据进行扰动重力梯度模型解算,将结果作为“评估值”。对比“基准值”与“评估值”之差,研究发现:1)基于推导公式的最小二乘配置方法解算得到的扰动重力梯度值与频谱域方法得到扰动梯度“基准值”各分量在空间形变变化上是一致的;2)统计扰动重力梯度各分量的差值ΔδΓ_(xx)^(fft-lsc)、ΔδΓ_(xy)^(fft-lsc)、ΔδΓ_(xz)^(fft-lsc)、ΔδΓ_(yy)^(fft-lsc)、ΔδΓ_(yz)^(fft-lsc)和ΔΓ_(zz)^(fft-lsc)“基准值”与“评估值”差值的标准差分别为5.54E、5.30E、1.85E、6.55E、2.09E和9.67E(1E=1×10^(-9)s^(-2)),远低于国际上实测重力梯度与解算模型差值的研究结果。最后,基于云南地区实测地表差分重力值,文中首次给出了该区域半波长约20km的重力梯度场年际变化模型。文中的思路和方法提高了广泛分布的重力数据(主要为重力异常和扰动重力)的使用效率,可为地球物理学、地质学研究更好地理解和解释重力数据、重力梯度数据及其与场源的关系提供数据基础。 展开更多
关键词 协方差函数 起伏地形 云南地区 非格网重力值 区域重力梯度场构建
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崎岖海底对下伏水平地层反射波特征的影响 被引量:1
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作者 刘志强 黄磊 +2 位作者 李钢柱 许磊 李文宝 《吉林大学学报(地球科学版)》 CAS CSCD 北大核心 2023年第1期274-282,共9页
在海洋地震勘探中,剧烈的海底起伏和速度差对下伏地层反射波运动学和动力学特征均产生较大影响。本文针对崎岖海底建立了海底大陡坡模型、海底坳陷模型、海底隆起模型和海底火山模型,并通过交错网格下优化的八阶精度有限差分法和优化的... 在海洋地震勘探中,剧烈的海底起伏和速度差对下伏地层反射波运动学和动力学特征均产生较大影响。本文针对崎岖海底建立了海底大陡坡模型、海底坳陷模型、海底隆起模型和海底火山模型,并通过交错网格下优化的八阶精度有限差分法和优化的四阶精度Runge-Kutt(RK)法模拟研究了崎岖海底对下伏水平地层反射波特征的影响。数值算例表明:海底大陡坡、海底坳陷和海底隆起不仅使下伏水平地层的反射波和转换波发生畸变不再是标准的双曲线,而且影响反射波能量分布,从而容易造成构造假象;海底火山使下伏水平地层的反射波和转换波发生了更加复杂的畸变,给海洋地震勘探的数据处理和解释带来困难。 展开更多
关键词 崎岖海底 交错网格 优化的有限差分法 优化的RK法 反射波特征
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艰险山区铁路技术接口质量管理绩效评价研究 被引量:3
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作者 文圆圆 鲍学英 +1 位作者 班新林 许见超 《铁道科学与工程学报》 EI CAS CSCD 北大核心 2023年第7期2698-2707,共10页
为提高艰险山区铁路工程技术接口的质量管理水平,满足质量管理的目标要求,提出适合于艰险山区铁路工程技术接口质量管理绩效评价的研究方法。基于艰险山区地质复杂、环境恶劣的自然环境特征,以及铁路工程技术接口质量管理的重要作用,通... 为提高艰险山区铁路工程技术接口的质量管理水平,满足质量管理的目标要求,提出适合于艰险山区铁路工程技术接口质量管理绩效评价的研究方法。基于艰险山区地质复杂、环境恶劣的自然环境特征,以及铁路工程技术接口质量管理的重要作用,通过对艰险山区铁路工程技术接口质量管理活动在人员、材料、机械设备、技术、环境、管理、参与方以及质量结果方面的影响因素分析,从质量目标、质量制度、质量意识、质量技术、质量过程、质量结果以及质量环境7个方面构建艰险山区铁路技术接口质量管理绩效评价指标体系。利用乘法合成法将C-OWA算子法和CRITIC-熵权法组合赋权,确定各评价指标的综合权重。运用云模型对艰险山区铁路工程技术接口质量管理绩效水平进行综合评价,采用MATLAB绘制出相应的评价云图,并与标准云图进行对比,确定最终的技术接口质量管理绩效评价结果。以拉林铁路DK263+844.62~DK303+105标段进行实证研究,结果表明:该标段技术接口质量管理绩效评价水平处于“优秀”和“良好”之间,且偏向于“良好”。该实例研究验证了该模型的适用性与有效性,为艰险山区铁路工程技术接口质量管理水平的优劣提供了评判依据,也促进了我国艰险山区铁路工程技术接口质量管理水平的提升。 展开更多
关键词 铁路技术接口 艰险山区 质量管理绩效评价 C-OWA算子 CRITIC-熵权法 云模型
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