Color,as a significant element of village landscapes,serves various functions such as enhancing aesthetic appeal and attractiveness,conveying emotions and cultural values.To explore the three-dimensional spatial chara...Color,as a significant element of village landscapes,serves various functions such as enhancing aesthetic appeal and attractiveness,conveying emotions and cultural values.To explore the three-dimensional spatial characteristics of color landscapes in beautiful villages,this study conducted a comparative experiment involving eight provinciallevel beautiful villages and eight ordinary villages in Jinzhai County.Landscape pattern indices were used to analyze the color landscape patterns on the facades of these villages,complemented by a quantitative analysis of color attributes using theMunsell color system.The results indicate that(1)Natural landscape colors in beautiful villages are primarily concentrated in the yellow-red to green-yellow interval,while those in ordinary villages are widely distributed in the red to blue-green interval.Artificial landscape colors in beautiful villages aremainly characterized by medium value,with chroma concentrated in the low chroma range.(2)The proportion of color areas for forests,grasslands,and building walls in beautiful villages is higher by 14.76%,2.17%,and 5.16%,respectively,compared to ordinary villages.However,the proportion of yellow exposed areas in ordinary villages ismore than twice that of beautiful villages.(3)The Landscape Shape Index for forests,grasslands,and buildings in beautiful villages is 5.23,8.01,and 8.19,respectively,indicating a higher irregularity in color patches.(4)Ordinary villages exhibit a higher Shannon’s diversity index,indicating amore complex distribution of colors,whereas beautiful villages demonstrate a higher number of connected dominant patches.This study can provide a scientific basis for village color planning and layout.展开更多
Stereoscopic three-dimensional echocardiography（S-3DE） is a novel displaying technol-ogy based on real-time 3-dimensional echocardiography （RT-3DE）. Our study was to evaluate the feasibility and efficiency of S-3D...Stereoscopic three-dimensional echocardiography（S-3DE） is a novel displaying technol-ogy based on real-time 3-dimensional echocardiography （RT-3DE）. Our study was to evaluate the feasibility and efficiency of S-3DE in the diagnosis of atrial septal defect （ASD） and its use in the guidance for transcatheter ASD occlusion. Twelve patients with secundum ASD underwent RT-3DE examination and 9 of the 12 were subjected to transcatheter closure of ASD. Stereoscopic vision was generated with a high-performance volume renderer with red-green stereoscopic glasses. S-3DE was compared with standard RT-3D display for the assessment of the shape, size, and the surrounding tis-sues of ASD and for the guidance of ASD occlusion. The appearance rate of coronary sinus and the mean formation time of the IVC, SVC were compared. Our results showed that S-3DE could measure the diameter of ASD accurately and there was no significant difference in the measurements between S-3DE and standard 3D display （2.89±0.73 cm vs 2.85±0.72 cm, P〉0.05; r=0.96, P〈0.05）. The appearance of coronary sinus for S-3DE was higher as compared with the standard 3D display （93.3% vs 100%）. The mean time of the IVC, SVC for S-3DE monitor was slightly shorter than that of the standard 3D display （11.0±3.8 s vs 10.3±3.6 s, P〉0.05）. The mean completion time of interven-tional procedure was shortened with S-3DE display as compared with standard 3D display （17.3±3.1 min vs 23.0±3.9 min, P〈0.05）. Stereoscopic three-dimensional echocardiography could improve the visualization of three-dimensional echocardiography, facilitate the identification of the adjacent structures, decrease the time required for interventional manipulation. It may be a feasible, safe, and efficient tool for guiding transcatheter septal occlusion or the surgical interventions.展开更多
Peitai Real Scene clearly shows us the gorgeous image of Xu-style gardens in the Ming Dynasty,and discloses the achievement of ancient Xu-style gardens,which is of great significance for studying Xu-style gardens.From...Peitai Real Scene clearly shows us the gorgeous image of Xu-style gardens in the Ming Dynasty,and discloses the achievement of ancient Xu-style gardens,which is of great significance for studying Xu-style gardens.From the perspective of spatial processing,plant landscaping,architectural style,stone and water layout,this paper brought us back to the ancient glory of Peitai through analyzing this painting,which was extremely valuable for the research on Xu-style gardens.展开更多
针对传统自然资源地籍调查依赖大量现场工作和后期数据处理导致的调查周期长、成本高等问题,提出了一种基于Cesium for Unreal的自然资源远程协同调查方法。该方法以倾斜摄影获取的实景三维模型为基础,叠加权属、土地利用等业务数据构...针对传统自然资源地籍调查依赖大量现场工作和后期数据处理导致的调查周期长、成本高等问题,提出了一种基于Cesium for Unreal的自然资源远程协同调查方法。该方法以倾斜摄影获取的实景三维模型为基础,叠加权属、土地利用等业务数据构建调查场景,并通过优化实景三维模型的渲染效果和性能,使自然资源信息以更加直观、真实的方式呈现。在此基础上,自然资源所在地相关政府部门可直接在系统中查看界址、权属等信息,并与实景进行对比核实,然后在线反馈和记录问题;调查单位根据反馈在系统中直接修改数据,完成后即可与政府部门进行线上确认和签字。肇庆某湿地公园的试点应用结果表明,该方法能显著提高自然资源地籍调查效率,压缩工期,具有较好的应用前景。展开更多
基金the National Natural Science Foundation of China(Grant Number 42301478)Natural Science Foundation of Anhui Province(No.2208085QD108)the Major Project of Natural Science Research of Anhui Provincial Department of Education(Grant Number KJ2021ZD0130).
文摘Color,as a significant element of village landscapes,serves various functions such as enhancing aesthetic appeal and attractiveness,conveying emotions and cultural values.To explore the three-dimensional spatial characteristics of color landscapes in beautiful villages,this study conducted a comparative experiment involving eight provinciallevel beautiful villages and eight ordinary villages in Jinzhai County.Landscape pattern indices were used to analyze the color landscape patterns on the facades of these villages,complemented by a quantitative analysis of color attributes using theMunsell color system.The results indicate that(1)Natural landscape colors in beautiful villages are primarily concentrated in the yellow-red to green-yellow interval,while those in ordinary villages are widely distributed in the red to blue-green interval.Artificial landscape colors in beautiful villages aremainly characterized by medium value,with chroma concentrated in the low chroma range.(2)The proportion of color areas for forests,grasslands,and building walls in beautiful villages is higher by 14.76%,2.17%,and 5.16%,respectively,compared to ordinary villages.However,the proportion of yellow exposed areas in ordinary villages ismore than twice that of beautiful villages.(3)The Landscape Shape Index for forests,grasslands,and buildings in beautiful villages is 5.23,8.01,and 8.19,respectively,indicating a higher irregularity in color patches.(4)Ordinary villages exhibit a higher Shannon’s diversity index,indicating amore complex distribution of colors,whereas beautiful villages demonstrate a higher number of connected dominant patches.This study can provide a scientific basis for village color planning and layout.
文摘Stereoscopic three-dimensional echocardiography（S-3DE） is a novel displaying technol-ogy based on real-time 3-dimensional echocardiography （RT-3DE）. Our study was to evaluate the feasibility and efficiency of S-3DE in the diagnosis of atrial septal defect （ASD） and its use in the guidance for transcatheter ASD occlusion. Twelve patients with secundum ASD underwent RT-3DE examination and 9 of the 12 were subjected to transcatheter closure of ASD. Stereoscopic vision was generated with a high-performance volume renderer with red-green stereoscopic glasses. S-3DE was compared with standard RT-3D display for the assessment of the shape, size, and the surrounding tis-sues of ASD and for the guidance of ASD occlusion. The appearance rate of coronary sinus and the mean formation time of the IVC, SVC were compared. Our results showed that S-3DE could measure the diameter of ASD accurately and there was no significant difference in the measurements between S-3DE and standard 3D display （2.89±0.73 cm vs 2.85±0.72 cm, P〉0.05; r=0.96, P〈0.05）. The appearance of coronary sinus for S-3DE was higher as compared with the standard 3D display （93.3% vs 100%）. The mean time of the IVC, SVC for S-3DE monitor was slightly shorter than that of the standard 3D display （11.0±3.8 s vs 10.3±3.6 s, P〉0.05）. The mean completion time of interven-tional procedure was shortened with S-3DE display as compared with standard 3D display （17.3±3.1 min vs 23.0±3.9 min, P〈0.05）. Stereoscopic three-dimensional echocardiography could improve the visualization of three-dimensional echocardiography, facilitate the identification of the adjacent structures, decrease the time required for interventional manipulation. It may be a feasible, safe, and efficient tool for guiding transcatheter septal occlusion or the surgical interventions.
文摘Peitai Real Scene clearly shows us the gorgeous image of Xu-style gardens in the Ming Dynasty,and discloses the achievement of ancient Xu-style gardens,which is of great significance for studying Xu-style gardens.From the perspective of spatial processing,plant landscaping,architectural style,stone and water layout,this paper brought us back to the ancient glory of Peitai through analyzing this painting,which was extremely valuable for the research on Xu-style gardens.
文摘针对传统自然资源地籍调查依赖大量现场工作和后期数据处理导致的调查周期长、成本高等问题,提出了一种基于Cesium for Unreal的自然资源远程协同调查方法。该方法以倾斜摄影获取的实景三维模型为基础,叠加权属、土地利用等业务数据构建调查场景,并通过优化实景三维模型的渲染效果和性能,使自然资源信息以更加直观、真实的方式呈现。在此基础上,自然资源所在地相关政府部门可直接在系统中查看界址、权属等信息,并与实景进行对比核实,然后在线反馈和记录问题;调查单位根据反馈在系统中直接修改数据,完成后即可与政府部门进行线上确认和签字。肇庆某湿地公园的试点应用结果表明,该方法能显著提高自然资源地籍调查效率,压缩工期,具有较好的应用前景。
