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“介词+(the)night”辨
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作者 陈起 《语言教育》 1989年第1期47-47,共1页
一、at night(表示在傍晚、晚上或夜里。) 1.6 o′clock at night 2.come home from work at night 3.keep a light on at night二、by night(表示在夜间或乘夜间,表示“在夜间”时.常和 by day连用,含有与白天相对的意思。) 4.The moon... 一、at night(表示在傍晚、晚上或夜里。) 1.6 o′clock at night 2.come home from work at night 3.keep a light on at night二、by night(表示在夜间或乘夜间,表示“在夜间”时.常和 by day连用,含有与白天相对的意思。) 4.The moon and stars give light by night. 5.We shall travel by night as well as by day. 6.In order to avoid the heavy traffic on the roads,some peopleprefer to travel by night. 展开更多
关键词 night TRAVEL SPEND CLOCK traffic stars STORM RETURN stopped
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On Writing Style In “The Armies of the Night”
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作者 LiXiong 《吉安师专学报》 1992年第3期70-72,共3页
“The Armies of the Night” was written by the American contemporary prominent writer Norman Mailer in a particular skill--combining fictional art with journalistic writing.It has been considered one of Norman Mailer&... “The Armies of the Night” was written by the American contemporary prominent writer Norman Mailer in a particular skill--combining fictional art with journalistic writing.It has been considered one of Norman Mailer's best books and was awarded the pulitzer prize in 1968. 展开更多
关键词 《The ARMIES of the night 美国 文学评论 写作手法
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Higher Grain-Filling Rate in Inferior Spikelets of Tolerant Rice Genotype Offset Grain Yield Loss under Post-Anthesis High Night Temperatures
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作者 Nitin SHARMA Bhupinder SINGH +6 位作者 Subbaiyan Gopala KRISHNAN Haritha BOLLINEDI Pranab Kumar MANDAL Milan Kumar LAL Prakash Kumar JHA P.V.Vara PRASAD Anjali ANAND 《Rice science》 SCIE CSCD 2024年第5期572-586,I0059-I0061,共18页
Increased nighttime respiratory losses decrease the amount of photoassimilates available for plant growth and yield. We hypothesized that the increased respiratory carbon loss under high night temperatures(HNT) could ... Increased nighttime respiratory losses decrease the amount of photoassimilates available for plant growth and yield. We hypothesized that the increased respiratory carbon loss under high night temperatures(HNT) could be compensated for by increased photosynthesis during the day following HNT exposure. Two rice genotypes, Vandana(HNT-sensitive) and Nagina 22(HNT-tolerant), were exposed to HNT(4 ℃ above the control) from flowering to physiological maturity. They were assessed for alterations in the carbon balance of the source(flag leaf) and its subsequent impact on grain filling dynamics and the quality of spatially differentiated sinks(superior and inferior spikelets). Both genotypes exhibited significantly higher night respiration rates. However, only Nagina 22 compensated for the high respiration rates with an increased photosynthetic rate, resulting in a steady production of total dry matter under HNT. Nagina 22 also recorded a higher grain-filling rate, particularly at 5 and 10 d after flowering, with 1.5- and 4.0-fold increases in the translocation of ^(14)C sugars to the superior and inferior spikelets, respectively. The ratio of photosynthetic rate to respiratory rate on a leaf area basis was negatively correlated with spikelet sterility, resulting in a higher filled spikelet number and grain weight per plant, particularly for inferior grains in Nagina 22. Grain quality parameters such as head rice recovery, high-density grains, and gelatinization temperature were maintained in Nagina 22. An increase in the rheological properties of rice flour starch in Nagina 22 under HNT indicated the stability of starch and its ability to reorganize during the cooling process of product formation. Thus, our study showed that sink adjustments between superior and inferior spikelets favored the growth of inferior spikelets, which helped to offset the reduction in grain weight under HNT in the tolerant genotype Nagina 22. 展开更多
关键词 high night temperature inferior grain pasting property radiolabeled sugar superior grain
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ED-Ged:Nighttime Image Semantic Segmentation Based on Enhanced Detail and Bidirectional Guidance
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作者 Xiaoli Yuan Jianxun Zhang +1 位作者 Xuejie Wang Zhuhong Chu 《Computers, Materials & Continua》 SCIE EI 2024年第8期2443-2462,共20页
Semantic segmentation of driving scene images is crucial for autonomous driving.While deep learning technology has significantly improved daytime image semantic segmentation,nighttime images pose challenges due to fac... Semantic segmentation of driving scene images is crucial for autonomous driving.While deep learning technology has significantly improved daytime image semantic segmentation,nighttime images pose challenges due to factors like poor lighting and overexposure,making it difficult to recognize small objects.To address this,we propose an Image Adaptive Enhancement(IAEN)module comprising a parameter predictor(Edip),multiple image processing filters(Mdif),and a Detail Processing Module(DPM).Edip combines image processing filters to predict parameters like exposure and hue,optimizing image quality.We adopt a novel image encoder to enhance parameter prediction accuracy by enabling Edip to handle features at different scales.DPM strengthens overlooked image details,extending the IAEN module’s functionality.After the segmentation network,we integrate a Depth Guided Filter(DGF)to refine segmentation outputs.The entire network is trained end-to-end,with segmentation results guiding parameter prediction optimization,promoting self-learning and network improvement.This lightweight and efficient network architecture is particularly suitable for addressing challenges in nighttime image segmentation.Extensive experiments validate significant performance improvements of our approach on the ACDC-night and Nightcity datasets. 展开更多
关键词 night driving semantic segmentation nighttime image processing adverse illumination differentiable filters
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High-quality Development of the Pearl River Night Tour in the Context of Deep Integration of Culture and Tourism
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作者 Juan JIANG Lianrong PANG 《Meteorological and Environmental Research》 2024年第1期38-45,共8页
Urban night tourism is a new form of urban tourism development and an important driving force for the prosperity of urban night economy.As the most prestigious business card among many night tour projects in Guangzhou... Urban night tourism is a new form of urban tourism development and an important driving force for the prosperity of urban night economy.As the most prestigious business card among many night tour projects in Guangzhou,the Pearl River water night tour has contributed to the development of Guangzhou s night economy,which cannot be underestimated.However,in the process of rapid development,there are also problems such as diversified operators,insufficient integration of intangible cultural elements,excessive commercial attributes,issues of tourism facilities and service facilities.Under the new stage of integrated development of culture and tourism,how to use mutual promotion of culture and tourism in the Pearl River night tour to seek innovative paths for high-quality development in the future is the main problem expected to be solved in this paper.Therefore,based on the perspective of culture and tourism integration,this paper analyzes the general situation and development status of the Pearl River night tour,and proposes five development strategies:the overall planning of culture and tourism integration,the deep integration of intangible cultural elements,the balance of commercial attributes and tourism attributes,the high integration of culture,business,tourism and education,and the creation of tourism atmosphere,in order to provide inspiration for the healthy,orderly and high-quality development of the Pearl River night tour. 展开更多
关键词 Integration of culture and tourism The Pearl River night tour High-quality development Intangible cultural elements
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Strategies for Applying LED Lights in Night Space Lighting for Bridges
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作者 Yingling Dai Qinghua Zhao 《Journal of World Architecture》 2024年第3期57-62,共6页
LED lights have been widely used in urban night space lighting in recent years as they are small,energy-saving,and efficient.This article explores the use of LEDs in bridge night space lighting and their application s... LED lights have been widely used in urban night space lighting in recent years as they are small,energy-saving,and efficient.This article explores the use of LEDs in bridge night space lighting and their application strategies.The aim is to offer valuable insights and references for urban planners and bridge lighting designers in China.By advancing the application of LED technology in bridge night lighting,the goal is to enhance the city’s nighttime ambiance,making the bridge an iconic landmark and a defining feature of the city. 展开更多
关键词 Bridge night space lighting LED application Color band and gradient Artistic value Online publication:July 11 2024
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Short-term night lighting disrupts lipid and glucose metabolism in Zebra Finches:Implication for urban stopover birds
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作者 Na Zhu Jing Shang Shuping Zhang 《Avian Research》 SCIE CSCD 2023年第4期663-670,共8页
Night lighting has been shown to affect wild animals.To date,the effects of night lighting on the metabolic homeostasis of birds that spend short time in urban environments remain unclear.Using model bird species Zebr... Night lighting has been shown to affect wild animals.To date,the effects of night lighting on the metabolic homeostasis of birds that spend short time in urban environments remain unclear.Using model bird species Zebra Finch(Taeniopygia guttata),we investigated the effects of short-term night lighting on liver transcriptome,blood glucose,triglyceride,and thyroxine(T4 and T3)levels in birds exposed to two different night lighting duration periods(three days and six days).After three days of night lighting exposure,the expression of genes involved in fat synthesis in the liver was upregulated while the expression of genes involved in fatty acid oxidation and triglyceride decomposition was downregulated.There was also a reduction in blood triglyceride,glucose,and T3 concentrations.However,after six days of night lighting,the expression of genes associated with fatty acid decomposition and hyperglycemia in the liver was upregulated,while the expression of genes involved in fat synthesis was downregulated.Simultaneously,blood glucose levels and T3 concentration increased.These findings indicate that short-term exposure to night lighting can disrupt the lipid and glucose metabolism of small passerine birds,and longer stopovers in urban area with intense night lighting may cause birds to consume more lipid energy. 展开更多
关键词 BIRDS Glucose LIPID Metabolism night lighting SHORT-TERM
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Single-image night haze removal based on color channel transfer and estimation of spatial variation in atmospheric light
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作者 Shu-yun Liu Qun Hao +6 位作者 Yu-tong Zhang Feng Gao Hai-ping Song Yu-tong Jiang Ying-sheng Wang Xiao-ying Cui Kun Gao 《Defence Technology(防务技术)》 SCIE EI CAS CSCD 2023年第7期134-151,共18页
The visible-light imaging system used in military equipment is often subjected to severe weather conditions, such as fog, haze, and smoke, under complex lighting conditions at night that significantly degrade the acqu... The visible-light imaging system used in military equipment is often subjected to severe weather conditions, such as fog, haze, and smoke, under complex lighting conditions at night that significantly degrade the acquired images. Currently available image defogging methods are mostly suitable for environments with natural light in the daytime, but the clarity of images captured under complex lighting conditions and spatial changes in the presence of fog at night is not satisfactory. This study proposes an algorithm to remove night fog from single images based on an analysis of the statistical characteristics of images in scenes involving night fog. Color channel transfer is designed to compensate for the high attenuation channel of foggy images acquired at night. The distribution of transmittance is estimated by the deep convolutional network DehazeNet, and the spatial variation of atmospheric light is estimated in a point-by-point manner according to the maximum reflection prior to recover the clear image. The results of experiments show that the proposed method can compensate for the high attenuation channel of foggy images at night, remove the effect of glow from a multi-color and non-uniform ambient source of light, and improve the adaptability and visual effect of the removal of night fog from images compared with the conventional method. 展开更多
关键词 Dehazing image captured at night Chromaticity fusion correction Color channel transfer Spatial change-based atmospheric light ESTIMATION DehazeNet
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High-quality Development Path of Night Tourism in Guangzhou:A Case Study of Firefly Night Tour
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作者 JIANG Juan TANG Wei ZHU Yanqing 《Journal of Landscape Research》 2023年第5期89-93,97,共6页
Night tourism often involves a large number of lighting facilities,which consume a large amount of energy.Therefore,one of the unique low energy consumption natural ecological tourism activities—firefly night tour ha... Night tourism often involves a large number of lighting facilities,which consume a large amount of energy.Therefore,one of the unique low energy consumption natural ecological tourism activities—firefly night tour has attracted attention and become an important breakthrough point for night tourism in tourist destinations.In this paper,Guangzhou firefly night tour project is taken as the research object.Based on the comprehensive economic,environmental,and socio-cultural benefits brought by the development of firefly night tour,the resources distribution,current development status,and existing problems of firefly night tour in Guangzhou are analyzed,and its high-quality development paths are proposed from three levels:government,industry,and tourist.The aim is to explore a new model for the economic development of Guangzhou night tour,boosting the transformation and upgrading of the night tourism economy,while also providing reference ideas and value for the development of night tourism economy in other tourist destinations. 展开更多
关键词 night tourism Firefly night tour GUANGZHOU High-quality development
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Night Economy Glows with New Vitality
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作者 Leo Zhang 《China's Foreign Trade》 2023年第4期57-60,共4页
According to data from ii-Media Research,China’s night economy has grown rapidly since 2016.By the end of 2020,the scale of China’s night economy had exceeded RMB 30 trillion,an increase of 5.0%over the same period ... According to data from ii-Media Research,China’s night economy has grown rapidly since 2016.By the end of 2020,the scale of China’s night economy had exceeded RMB 30 trillion,an increase of 5.0%over the same period of last year,and it is expected to exceed RMB 48 trillion in 2023.According to the latest survey data of the Ocean Engine City Institute in 2023,more than 60%of respondents will go out for activities or consumption at night,among which citizens in high-speed cities have a higher preference for going out at night because of the relatively perfect urban infrastructure. 展开更多
关键词 ECONOMY PERFECT night
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Night Vision Object Tracking System Using Correlation Aware LSTM-Based Modified Yolo Algorithm
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作者 R.Anandha Murugan B.Sathyabama 《Intelligent Automation & Soft Computing》 SCIE 2023年第4期353-368,共16页
Improved picture quality is critical to the effectiveness of object recog-nition and tracking.The consistency of those photos is impacted by night-video systems because the contrast between high-profile items and diffe... Improved picture quality is critical to the effectiveness of object recog-nition and tracking.The consistency of those photos is impacted by night-video systems because the contrast between high-profile items and different atmospheric conditions,such as mist,fog,dust etc.The pictures then shift in intensity,colour,polarity and consistency.A general challenge for computer vision analyses lies in the horrid appearance of night images in arbitrary illumination and ambient envir-onments.In recent years,target recognition techniques focused on deep learning and machine learning have become standard algorithms for object detection with the exponential growth of computer performance capabilities.However,the iden-tification of objects in the night world also poses further problems because of the distorted backdrop and dim light.The Correlation aware LSTM based YOLO(You Look Only Once)classifier method for exact object recognition and deter-mining its properties under night vision was a major inspiration for this work.In order to create virtual target sets similar to daily environments,we employ night images as inputs;and to obtain high enhanced image using histogram based enhancement and iterative wienerfilter for removing the noise in the image.The process of the feature extraction and feature selection was done for electing the potential features using the Adaptive internal linear embedding(AILE)and uplift linear discriminant analysis(ULDA).The region of interest mask can be segmen-ted using the Recurrent-Phase Level set Segmentation.Finally,we use deep con-volution feature fusion and region of interest pooling to integrate the presently extremely sophisticated quicker Long short term memory based(LSTM)with YOLO method for object tracking system.A range of experimentalfindings demonstrate that our technique achieves high average accuracy with a precision of 99.7%for object detection of SSAN datasets that is considerably more than that of the other standard object detection mechanism.Our approach may therefore satisfy the true demands of night scene target detection applications.We very much believe that our method will help future research. 展开更多
关键词 Object monitoring night vision image SSAN dataset adaptive internal linear embedding uplift linear discriminant analysis recurrent-phase level set segmentation correlation aware LSTM based yolo classifier algorithm
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数字经济发展与城市收缩——来自夜间灯光数据的证据 被引量:1
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作者 汤凯 刘晓康 《管理学刊》 北大核心 2024年第2期16-33,共18页
数字经济正成为社会经济发展的新动能,它对于抑制城市收缩、促进城市协调发展具有深远影响。利用2011—2021年夜间灯光数据,识别城市收缩,并考察数字经济发展对城市收缩的影响。研究发现,数字经济发展可以显著抑制城市收缩;数字经济发... 数字经济正成为社会经济发展的新动能,它对于抑制城市收缩、促进城市协调发展具有深远影响。利用2011—2021年夜间灯光数据,识别城市收缩,并考察数字经济发展对城市收缩的影响。研究发现,数字经济发展可以显著抑制城市收缩;数字经济发展抑制城市收缩的效应在收缩型城市以及市场化水平低、教育水平低的地区表现得更为明显;城市收入差距、产业结构升级、城市创新创业是数字经济发展抑制城市收缩的重要渠道,加强网络基础设施建设会更有利于数字经济抑制城市严重收缩。进一步研究发现,数字经济发展对城市收缩的影响具有门槛效应,即当数字经济发展达到一定水平后,它对城市收缩的抑制作用才会显现,同时抑制作用具有边际报酬递增的后发性优势。本研究有助于揭示数字经济发展影响城市收缩的作用机制,对于如何利用数字经济有效抑制城市收缩提供了经验支持。 展开更多
关键词 数字经济 城市收缩 夜间灯光数据 影响机制 门槛效应
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Bonfire Night
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作者 《疯狂英语(初中天地)》 2023年第11期28-29,共2页
In the UK,Bonfire Night or Guy Fawkes Night is celebrated on 5 November and the night skies are filled with colour.It’s a special day in honour of a historic event.
关键词 FILLED night night
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不同风格驾驶员眼动特性分析——夜间快速路分流区 被引量:1
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作者 吴立新 杜聪 《交通科技与经济》 2024年第1期43-50,共8页
为提高驾驶员在夜间快速路分流区换道的安全性,以不同风格的驾驶员为研究对象,分析不同风格驾驶员换道时眼动参数的变化规律。首先在前人研究基础上自编夜间快速路驾驶风格量表,对量表进行信度和Pearson相关系数法的效度检验;然后通过... 为提高驾驶员在夜间快速路分流区换道的安全性,以不同风格的驾驶员为研究对象,分析不同风格驾驶员换道时眼动参数的变化规律。首先在前人研究基础上自编夜间快速路驾驶风格量表,对量表进行信度和Pearson相关系数法的效度检验;然后通过主成分分析法对问卷调查法得出的结果进行分析,得出驾驶风格综合得分量化模型,并使用K均值聚类分析法划分驾驶风格;最后基于眼动仪进行实车试验,获取三种风格驾驶员换道的眼动数据。试验结果表明:谨慎型、一般型、激进型驾驶员对于后视镜平均注视次数占比为48%、27%、25%;对左右两侧的平均累计注视时间占比是31%、25%、19%;平均瞳孔面积占比为56.3%、27.6%、16.1%。试验结果可以为提高驾驶员换道的行车安全性研究提供一定的数据支持。 展开更多
关键词 交通工程 眼动特性 主成分分析 驾驶风格 换道 快速路分流区 夜间
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术前夜间血压与结肠癌患者腹腔镜微创全结肠系膜切除术后发生并发症的关系
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作者 马剑锋 黑涛 +1 位作者 赵正国 杨伟龙 《中国内镜杂志》 2024年第4期45-51,共7页
目的探讨术前夜间血压和结肠癌患者腹腔镜微创全结肠系膜切除术后发生并发症的关系。方法选择2017年3月-2023年3月于该院行腹腔镜微创全结肠系膜切除术的174例结肠癌患者。将术前夜间血压下降率≥0%的患者作为下降组,例数为92例;将术前... 目的探讨术前夜间血压和结肠癌患者腹腔镜微创全结肠系膜切除术后发生并发症的关系。方法选择2017年3月-2023年3月于该院行腹腔镜微创全结肠系膜切除术的174例结肠癌患者。将术前夜间血压下降率≥0%的患者作为下降组,例数为92例;将术前夜间血压下降率<0%的患者作为上升组,例数为82例。分别收集患者在入室时、手术开始即刻、手术开始至30 min后、手术开始至60 min后、手术开始至120 min后和手术完成时的平均动脉压(MAP)。记录患者住院期间术后并发症发生情况;采用多因素Logistic回归模型,分析结肠癌患者行腹腔镜微创全结肠系膜切除术后发生并发症的独立危险因素。结果术前,下降组糖尿病发生率与左心室质量指数明显低于上升组(P<0.05);术前24 h动态血压参数中,两组患者术前夜间舒张压与夜间收缩压比较,差异有统计学意义(P<0.05);两组患者术中MAP各时间点比较,差异均无统计学意义(P>0.05);两组患者手术开始后各时间点MAP明显低于入室时(P<0.05);下降组术后住院时急性肾损伤的发生率为10.87%,明显低于升高组的31.71%(P<0.05);多因素Logistic回归分析结果显示,术前夜间血压上升为结肠癌患者行腹腔镜微创全结肠系膜切除术后发生急性肾损伤的独立危险因素(P<0.05)。结论术前夜间血压上升为结肠癌患者行腹腔镜微创全结肠系膜切除术后发生急性肾损伤的独立危险因素。 展开更多
关键词 夜间血压 结肠癌 腹腔镜微创全结肠系膜切除术 并发症
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1990-2020年长三角地区生境质量与夜间灯光的空间关系
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作者 彭建 吕俭 杨灿灿 《环境科学与技术》 CAS CSCD 北大核心 2024年第1期155-165,共11页
基于1990-2020年长三角地区的土地利用数据和夜间灯光数据,运用InVEST生境质量评估模型、双变量空间自相关、相关系数对生境质量与夜间灯光的时空关系进行研究,并应用地理加权回归和归纳法分析两者的响应规律,结果表明:(1)浙江省总体上... 基于1990-2020年长三角地区的土地利用数据和夜间灯光数据,运用InVEST生境质量评估模型、双变量空间自相关、相关系数对生境质量与夜间灯光的时空关系进行研究,并应用地理加权回归和归纳法分析两者的响应规律,结果表明:(1)浙江省总体上生境最优且城镇发展最快,安徽省在城镇快速发展的同时生境相对下降最少,生境质量和夜间灯光空间分布格局呈现出与区位、地形等因素的空间耦合性。(2)长三角地区生境质量与夜间灯光指数随着时间的发展空间上的依赖性越来越强,聚类模式主要为高-低、低-高及低-低3种。高-低聚类区域主要分布在浙江省和安徽省的南部、西部的山地丘陵,研究期内呈现缩小的趋势;低-高聚类区域在长三角东部平原区呈集聚分布、北部平原丘陵区呈零散分布,呈现扩张趋势。(3)不同年份各省份生境质量与夜间灯光指数呈显著负相关,且经济越发达的省份,生境质量与夜间灯光指数的负相关关系越强;生境质量与夜间灯光指数呈高度负相关的区县主要分布在长江下游沿岸和浙江省东部,相关性不显著的区县主要分布在安徽省、江苏省的北部,变化类型以负相关关系持续增强型占比最高。(4)生境质量与夜间灯光指数的相关关系随着城市发展呈U型变化,即随着城市发展,生境质量与夜间灯光指数的负相关关系先增强后下降。研究结果可为长三角城市可持续发展、生境调控提供前期基础。 展开更多
关键词 生境质量 夜间灯光影像 空间关系 演变规律 地理加权回归 长三角地区
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以提升患者就医体验为导向的中医药特色夜门诊实践探索
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作者 唐娅琴 边雪梅 +2 位作者 王亚屏 金露梦 孙华琴 《中国医院》 北大核心 2024年第5期92-94,共3页
满足不同就医人群的需求,提供夜间诊疗服务,是改善患者就医体验的重要途径之一。夜门诊的开设有利于医院科学合理调整门诊空间,整合有限的医疗资源。为了提升患者就医体验,保障患者医疗安全,夜门诊开设需要优化医护技等人员的合理配置,... 满足不同就医人群的需求,提供夜间诊疗服务,是改善患者就医体验的重要途径之一。夜门诊的开设有利于医院科学合理调整门诊空间,整合有限的医疗资源。为了提升患者就医体验,保障患者医疗安全,夜门诊开设需要优化医护技等人员的合理配置,加强医院多部门间的配合联动。浙江省中医院通过前期调研,结合中医医院特色、特长,开设具有中医药特色的夜门诊后,门诊运行效率进一步提高,医疗服务质量得到持续改进,得到患者的一致好评。 展开更多
关键词 就医体验 中医药特色 夜门诊
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基于夜游行为特征的夜游产品优化策略研究——以马鞍山市为例
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作者 包曾婷 吴桐 张淑萍 《安徽冶金科技职业学院学报》 2024年第2期64-66,共3页
文章选取马鞍山市若干个典型地点,对本地居民及外地游客的夜游行为特征进行调查,继而提出夜游产品优化策略:打造文化内涵丰富的特色街巷,优化夜间旅游环境设施,提升夜间旅游服务质量,细分夜间旅游产品市场,以期实现马鞍山夜游市场的可... 文章选取马鞍山市若干个典型地点,对本地居民及外地游客的夜游行为特征进行调查,继而提出夜游产品优化策略:打造文化内涵丰富的特色街巷,优化夜间旅游环境设施,提升夜间旅游服务质量,细分夜间旅游产品市场,以期实现马鞍山夜游市场的可持续发展。 展开更多
关键词 夜游行为特征 夜游产品 夜间经济 优化策略
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夜景照明亮度比例视觉适宜性评价仿真研究
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作者 王晓健 孙小叶 +1 位作者 连海涛 王子瑄 《计算机仿真》 2024年第6期411-415,共5页
夜景照明设备的整体亮度跨度较小,且存在很多限高区域,导致环境中整体亮度较差,为了提高夜景照明亮度与人眼视觉的适宜性,提出了夜景照明亮度比例视觉适宜性评价方法。通过夜景照明观测建模数据的标准化处理,采集夜景照明的亮度信息,利... 夜景照明设备的整体亮度跨度较小,且存在很多限高区域,导致环境中整体亮度较差,为了提高夜景照明亮度与人眼视觉的适宜性,提出了夜景照明亮度比例视觉适宜性评价方法。通过夜景照明观测建模数据的标准化处理,采集夜景照明的亮度信息,利用二维数据矩阵分解所得信息,确定夜景照明的环境因素,利用亮度监测模型,计算亮度数据的统计量,完成夜景照明亮度的监测。根据视觉感知的亮度与照明设备亮度之间的关系,计算出光照强度对比度,将驱动电源安装到夜景照明设备中,调节夜景照明亮度比例。将人眼视觉范围划分成多个区域,计算出视觉适宜度判定准则,依据人眼视觉可以承受的亮度与照明亮度的映射关系,定义夜景照明亮度的空间函数,通过夜景照明亮度通道适宜度叠加,实现夜景照明亮度比例视觉适宜性评价。实验结果表明,上述方法适用于夜景照明亮度比例视觉适宜性评价,可以提高评价结果准确性。 展开更多
关键词 适宜性 亮度比例 视觉系统 夜景照明 亮度监测 比例调节
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吕梁山两次夜间暴雨的边界层特征及能量来源与转换
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作者 王一颉 赵桂香 《沙漠与绿洲气象》 2024年第2期35-43,共9页
利用常规观测、NCEP/NCAR 1°×1°再分析、FY-2E卫星数据等资料,对分别由β-中尺度持续拉长状对流系统(MβECS)和中尺度对流复合体(MCC)造成的两次吕梁山夜间暴雨过程进行数值模拟和粒子后向轨迹追踪,结果表明:过程1受边... 利用常规观测、NCEP/NCAR 1°×1°再分析、FY-2E卫星数据等资料,对分别由β-中尺度持续拉长状对流系统(MβECS)和中尺度对流复合体(MCC)造成的两次吕梁山夜间暴雨过程进行数值模拟和粒子后向轨迹追踪,结果表明:过程1受边界层南风急流和西南气流影响,山西西部低空急流偏西分量和晋中盆地边界层西南气流的增强是对流不稳定能量重建的重要因子。过程2则受边界层南风和东风急流作用,南风急流被显著抬升到对流层中高层,形成含有冰晶层的中高层云系,东风急流则供应低空水汽。两次过程边界层(0.8-1.2 km)粒子携带的水汽均明显超过低层(1.5-3 km),是夜间短时强降水所需水汽的最大贡献者。700 hPa及以上非绝热作用产生扰动有效位能,之后向扰动动能的转化是两次过程中短时强降水发生所需能量的主要来源。 展开更多
关键词 夜间暴雨 中尺度对流系统 边界层 短时强降水 能量转换
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