高句丽王朝时期的文化艺术研究     

张卫峰 《广东海洋大学学报》2014,(2):85-88

通过高句丽王朝接受中原文化的途径、方式、程度,并结合高句丽王朝较其他少数民族在文化发展上的优势,对高句丽王朝时期的文化艺术发展作综合判断,认为高句丽文化艺术是边疆文化的重要组成部分,对东北亚地区的文化交流和传播做出重要贡献。  相似文献   

Investigating the Effectiveness of an Efficient Label Placement Method Using Eye Movement Data   总被引：1，自引：0，他引：1  

《The Cartographic journal》2013,50(3):234-246

Abstract

This paper focuses on improving the efficiency and effectiveness of dynamic and interactive maps in relation to the user. A label placement method with an improved algorithmic efficiency is presented. Since this algorithm has an influence on the actual placement of the name labels on the map, it is tested if this efficient algorithms also creates more effective maps: how well is the information processed by the user. We tested 30 participants while they were working on a dynamic and interactive map display. Their task was to locate geographical names on each of the presented maps. Their eye movements were registered together with the time at which a given label was found. The gathered data reveal no difference in the user’s response times, neither in the number and the duration of the fixations between both map designs. The results of this study show that the efficiency of label placement algorithms can be improved without disturbing the user’s cognitive map. Consequently, we created a more efficient map without affecting its effectiveness towards the user.  相似文献   

Study of the attentive behavior of novice and expert map users using eye tracking   总被引：1，自引：0，他引：1  

K. Ooms  P. De Maeyer  V. Fack 《制图学和地理信息科学》2013,40(1):37-54

The aim of this paper is to gain better understanding of the way map users read and interpret the visual stimuli presented to them and how this can be influenced. In particular, the difference between expert and novice map users is considered. In a user study, the participants studied four screen maps which had been manipulated to introduce deviations. The eye movements of 24 expert and novice participants were tracked, recorded, and analyzed (both visually and statistically) based on a grid of Areas of Interest. These visual analyses are essential for studying the spatial dimension of maps to identify problems in design. In this research, we used visualization of eye movement metrics (fixation count and duration) in a 2D and 3D grid and a statistical comparison of the grid cells. The results show that the users’ eye movements clearly reflect the main elements on the map. The users’ attentive behavior is influenced by deviating colors, as their attention is drawn to it. This could also influence the users’ interpretation process. Both user groups encountered difficulties when trying to interpret and store map objects that were mirrored. Insights into how different types of map users read and interpret map content are essential in this fast-evolving era of digital cartographic products.  相似文献   

Visual clutter reduction in zoomable proportional point symbol maps     

Tomasz Opach  J. Korycka-Skorupa  I. Karsznia  T. Nowacki  I. Gołębiowska  J. K. Rød 《制图学和地理信息科学》2013,40(4):347-367

ABSTRACT

Proportional point symbols are commonly used in map displays. However, when such displays are zoomed out, the available map space shrinks and consequently symbols overlap and the display suffers from visual clutter. Therefore, solutions are needed to reduce visual clutter in zoomable map displays that contain proportional point symbols. The authors add to the body of knowledge through the investigation of the performance of three solutions: aggregation of unit areas, the displacement of overlapping symbols, and modified symbolization; four variations of modified symbolization are examined in detail. The original study begins with a consideration of the strengths and weaknesses of the solutions, with an emphasis on information loss. Thereafter, user sessions with 165 participants are arranged to gain empirical evidence of the performance of the solutions. The results reveal that although participants zoom out the map to zoom levels that implement visual clutter reduction techniques, they tend to zoom in the map and pan it to examine specific areas. Moreover, they willingly use the map with aggregated unit areas in cases when the solution facilitates task accomplishment. A certain amount of skepticism attaches to the solution that displaces overlapping symbols.  相似文献   

减轻山区资源环境承载压力与扶贫的途径探讨——安康市教育扶贫模式实证研究     

何家理 《山地学报》2013,31(2)

秦巴山区生态良好,是中国的绿心,但经济极端贫困,且生态保护难度大,对外联系不便,外在形象与内在发展水平矛盾突出.选取秦巴山区腹地安康地区,通过分类问卷调查和座谈的方法进行调研,发现安康市通过教育扶贫,已产生了教育移民效应.高等教育和中等职业教育每年产生永久性移民在1万人左右(0.96万人),间接移民在3万人左右,起到了减轻当地资源承载压力的作用;农民工培训每年产生暂时性移民达63.2万人.安康市的实践经验对解决资源脆弱地区的脱贫致富和环境保护提供了范式.  相似文献   

The variable projection method for waveform inversion with an unknown source function     

James Rickett 《Geophysical Prospecting》2013,61(4):874-881

This paper compares three alternative algorithms for simultaneously estimating a source wavelet at the same time as an earth model in full‐waveform inversion: (i) simultaneous descent, (ii) alternating descent and (iii) descent with the variable projection method. The latter is a technique for solving separable least‐squares problems that is well‐known in the applied mathematics literature. When applied to full‐waveform inversion, it involves making the source wavelet an implicit function of the earth model via a least‐squares filter‐estimation process. Since the source wavelet becomes purely a function of medium parameters, it no longer needs to be treated as a separate unknown in the inversion. Essentially, the predicted data are projected onto the measured data in a least‐squares sense at every function evaluation, making use of the fact that the filter estimation problem is trivial when compared to the full‐waveform inversion problem. Numerical tests on a simple 1D model indicate that the variable projection method gives the best result; actually producing results in quality that are very similar to control experiments with a known, correct wavelet.  相似文献   

基于文献计量方法的国内外城市更新比较研究   总被引：1，自引：1，他引：0  

孙威  王晓楠  盛科荣 《地理科学》2020,40(8):1300-1309

采用文献计量方法，利用Citespace工具对国内外城市更新研究进行知识图谱分析，从演化过程、发文期刊和研究机构的特征、研究热点等方面对比国内外城市更新研究的差异。研究表明：① 国内外城市更新研究的发文量呈现波动上升的趋势，在快速发展阶段尤为显著，每年发文量分别达到117篇和238篇；② 研究文献多集中在城市规划、区域研究、城市设计、建筑学等期刊。相对于国外，国内发文期刊更集中。国内排名前10的期刊发文量占比达46.65%，国外仅29.84%；③ 国内外的研究机构间初步形成合作网络，但网络联系与合作程度依然较低。相对于国外，国内研究机构间联系更紧密。④ 国外研究热点集中在伙伴关系与公众参与、绅士化、可持续发展、城市转型和文化创意等方面，国内研究热点体现在旧城改造与房地产开发、历史街区和工业遗产的保护与更新、广州?深圳城市更新的探索与实践、公众参与的初步探讨等方面。  相似文献   

Comparing the terrain reversal effect in satellite images and in shaded relief maps: an examination of the effects of color and texture on 3D shape perception from shading     

Arzu Çöltekin  Julien Biland 《International Journal of Digital Earth》2019,12(4):442-459

Terrain reversal effect (TRE) causes reversed 3D shape perception in satellite images and shaded relief maps (SRMs), and introduces difficulties in identifying landforms such as valleys and ridges. With this paper, in a controlled laboratory experiment, we compare how well 27 participants could identify valleys and ridges over 33 locations using SRMs, color satellite images and grayscale satellite images. The main depth cue is shadow both in vertical-view images and SRMs. However, the presence of texture and color in images also affect 3D shape perception. All our participants experience the illusion strongly: with the SRMs, it is very severe (2% accuracy), with grayscale images low but considerably better than SRMs (17.6% accuracy), and slightly worse with color imagery (15.3% accuracy). These differences between SRMs and imagery suggest that the participants who are able to bypass the illusion consciously or subconsciously interpret the photographic information. We support this observation further with a cue-strength analysis. Furthermore, we provide exploratory analyses of the effects of expertise, global convexity bias, and bistable perception. Our original empirical observations serve towards a better understanding of this visual illusion, and contribute towards nuanced and appropriate solutions to correcting for TRE differently for satellite images and SRMs.  相似文献   

Numerical study of effect of fluke inclination on behavior of drag anchor in clay with linearly increasing shear strength under unidirectional and combined loading     

《Applied Ocean Research》2019

Drag anchor is a widely used anchor type in offshore engineering for the mooring system. The prediction of the anchor trajectory installation and the final position is important for anchor selection in design. The existing method using yield envelope method for trajectory prediction ignored the shallow anchor behavior but applied the deep yield envelope from a deeply embedded horizontal fluke in uniform clay for the whole drag-in installation process. However, the anchor fluke embedment depth and inclination angle change continually during installation in clay with linearly increasing shear strength soil profile in practice. Studies on the effect of fluke inclination angle on the anchor behavior in clay with such non-uniform soil profile under unidirectional and combined loading are important and necessary for the improvement of the yield envelope method to ensure a reasonable prediction. The current 2D finite element studies investigate the anchor behavior for inclined fluke in clay with linearly increasing shear strength under unidirectional vertical, horizontal and rotational loadings first. Then the effects of the fluke inclination angle, soil non-homogeneity and embedment depth ratio on the shallow yield envelopes are investigated. It is found that the effect of fluke inclination angle on the vertical capacity factors for anchor in clay with non-uniform and uniform soil profile is largely different. The resultant large impact on the yield envelopes shown here illustrates the importance of considering the fluke inclination angle and soil non-homogeneity in the prediction of anchor trajectory using yield envelope method.  相似文献   

The sustainable development goals: A case study     

《Marine Policy》2017

The Sustainable Development Goals or SDGs [44] are an ambitious step towards sustainable development, taking a much broader view of sustainability than ever achieved previously, yet practical challenges remain, including how to implement change. The aims of this research were to determine how an influential aquaculture company in Australia - Tassal, Tasmania's largest salmon aquaculture company - perceived the SDGs, and to ascertain the motivations and barriers for Tassal to work towards implementing the goals. Interviews were conducted with leaders, employees and external business partners. Tassal was not aware of the SDGs prior to this project, but were open to considering implementing them in their current sustainability practices. The survey responses were analysed using the Values-Rules-Knowledge (vrk) framework of decision making. Key findings were: 1) corporate and personal values were the key component driving Tassal's positive responses to the SDGs; 2) awareness of the SDGs resulted in Tassal recognising the potential gains from engaging with some of the seemingly less aquaculture-related goals (such as health and wellbeing). These findings demonstrate that businesses can fruitfully engage with the SDGs, even without government requirements or societal expectations, if they are prepared to broaden their interpretation of business sustainability and be reflective about their values. The vrk model is a potentially useful addition to current SDG and sustainability tools, such as those of the UN Global Compact, as a way to diagnose organisational barriers to adopting practices aligned with the SDGs. An emerging area of importance to social, economic and environmental sustainability – social license – was also identified as implicit in many, but not explicit in any of the SDGs.  相似文献