基于DFS的工程图多层次图块信息提取

针对工程图信息提取过程中的图块多层次引用问题,利用深度优先搜索算法对引用图块信息进行提取。建立图块多层次引用关系,介绍节点深度定义、目标节点判定方法及引用图块搜索策略,设计多层次引用路径搜索算法,并开发应用程序模块,实现多层次引用图块的信息提取。应用结果表明,该方法的提取准确率较高。     

进口空气相对湿度对直接蒸发冷却式空调机性能的影响

本文就进口空气的相对湿度对直接蒸发冷却式空调机性能的影响进行了分析,得出了在保证一定冷却效果的条件下冷却效率、填料厚度和出口空气相对湿度与进口空气相对湿度的关系曲线.     

Image analysis for 3D micro-features: A new hybrid measurement method

Measuring 3D micro-features is a challenging task that is usually performed using high-cost systems generally based on technologies with narrow working ranges and very accurate control of the sensor positions. Well-known image analysis methods, such as Photogrammetry, would likely lower the costs of 3D inspection of micro-features and add texture information to the 3D models; however, the behaviour of Photogrammetry is strongly affected by the scaling method because it retrieves a model that must be scaled after its computation. In this paper, an experimental study of the validity of a hybrid 3D image processing method for measuring micro-features is presented. This method exploits the Depth-from-Focus method to retrieve the correct scale for a photogrammetric model. The measurement of properly-designed and manufactured specimens was performed by following and adapting the German guideline VDI/VDE 2634, Part 3 to validate the method using calibrated specimens. The proposed system has been demonstrated to be very promising can achieve an error of less than 10 μm.     

Retrieving Aerosol Optical Depth Over Land basedon GOCI Data Onboard Geostationary Satellite

The aerosol optical depth were retrieved using deep\|blue algorithm based on the GOCI data of 72 clear\|sky days in 2013 over the Yangtze River Delta，and then were validated by field data from two measured sites.The results show that the GOCI data can be used for inversion of land aerosols，and both sites show high accuracy.The fitting degree of Beichenlou station of Nanjing University of Information Science and Technology is 0.659，and that of AERONET station is 0.747，which shows good agreement compared with MODIS aerosol products.At the same time，it is found that the aerosol products based on the GOCI data of the stationary satellite have the ability to monitor the diurnal variation of aerosol and provide the basis for the aerosol dynamic diffusion and the climate effect study.      

Stereoscopic view synthesis based on region-wise rendering and sparse representation

Depth image-based rendering (DIBR), which is used to render virtual views with a color image and the corresponding depth map, is one of the key techniques in the 2D to 3D conversion process. One of the main problems in DIBR is how to reduce holes that occur on the generated virtual view images. In this paper, we make two main contributions to deal with the problem. Firstly, a region-wise rendering framework, which divides the original image regions into three special classes and renders each with optimal adaptive process respectively, is introduced. Then, a novel sparse representation-based inpainting method, which can yield visually satisfactory results with less computational complexity for high quality 2D to 3D conversion, is proposed. Numerical experimental results demonstrate the good performance of the proposed methods.     

Simultaneous 2D and 3D perception for stereoscopic displays based on polarized or active shutter glasses

Viewing stereoscopic 3D content is typically enabled either by using polarizing or active shutter glasses. In certain cases, some viewers may not wear viewing glasses and hence, it would be desirable to tune the stereoscopic 3D content so that it could be simultaneously watched with and without viewing glasses. In this paper we propose a video post-processing technique which enables good quality 3D and 2D perception of the same content. This is done through manipulation of one view by making it more similar to the other view to reduce the ghosting artifact perceived without viewing glasses while 3D perception is maintained. The proposed technique includes three steps: disparity selection, contrast adjustment, and low-pass filtering. The proposed approach was evaluated through an extensive series of subjective tests, which also revealed good adjustment parameters to suit viewing with and without viewing glasses with an acceptable 3D and 2D quality, respectively.     

A study on the relationships among hand muscles and form factors of large-screen curved mobile devices

The aim of this study is to determine the effect of form factors (curvature rate, depth) of mobile devices on hand comfort when using large-screen curved mobile devices. To that end, four muscles (APB, APL, FDI, EDC) were selected and mockups for experiment were developed with four curvature rate levels (flat/100/200/300R) and five depth levels (3/5/7/9/11 mm). User experiment was conducted using three interactions (tapping, dragging, and texting) that usually take place on smartphones. EMG signal of each participant was measured. Combination of curvature and depth could maximize the physical comfort of hands and fingers through the experiment so that the interaction effect between form factors and tasks could be identified. Our results revealed that only APL and FDI had statistically significant muscle activity amounts across the curvature rates. With respect to effect of depth, all four muscles showed statistically significant difference in muscle activity. Moreover, results from the interaction effect among task levels of two tasks (target location of tapping and direction of dragging) and two form factors showed no interaction effect in either tapping or texting. The results of this study could be used to determine the optimal range for form factors of curved screen mobile devices in terms of physical comfort of the hand while using large-screen devices.     

引入零视差缓冲的DIBR改良方法

针对图像部分像素深度值失真,导致图像变形后物体边缘失真的问题,提出了一种引入“零视差缓冲”的方法。首先选取四幅具有不同复杂程度场景的图像,引入零视差缓冲对图像进行变形,其次采用传统图像质量评价体系（结构相似度SSIM和模糊系数K）对得到的图像进行质量评价,最后对比传统DIBR方法和引入零视差缓冲方法得到的视点图中物体边缘的表现。实验结果表明,该方法对于变形图像的SSIM平均提高了4.66%, K平均下降了1.73%。提高了视点图中物体边缘的质量,提高了3D图像的整体质量。     

建筑设计企业的市场营销策略探讨

建筑设计企业要以市场为导向,明确自身在市场中的地位,直面激烈的竞争。为实现效益最大化原则,建筑设计企业必须采取全新的市场营销策略,从竞争对手中突围,继而处于领先地位。本文通过分析,提出一些市场营销策略以供参考。     

贯入法检测砂浆抗压强度的试验研究

通过的砌筑自拌混合砂浆、预拌混合砂浆、水泥砂浆、专用砌筑砂浆及自拌抹灰砂浆、预拌抹灰砂浆、专用抹灰砂浆试块,进行贯入深度和抗压强度之间关系的试验,建立了各种砂浆的测强曲线,对其进行误差范围的分析,确定贯入法检测砂浆抗压强度测强曲线的分类,为JGJ/T136-2001的修编提供依据。