高层办公建筑空中庭院设计初探——以南充市大学科技园主楼创新创业孵化中心主楼概念方案设计为例

高层办公建筑是一种高效节地的建筑类型,在未来的城市建设中还将日益增多。随着人们对办公空间品质要求的不断提高,空中庭院作为改善高层办公建筑空间品质的有效方式,将越来越受到人们的重视。怡人的空间环境设计是空中庭院吸引人群驻足的前提条件;合理的空间秩序布置则能够提高空中庭院的使用效率;而高超适当的生态设计策略能让空中庭院在满足人们需求的前提下实现建筑的生态可持续发展。三种设计策略这三方面在空中庭院的设计中缺一不可,需要设计师把握和融合。本文笔者结合实际项目的实践与总结,以南充市大学科技园主楼创新创业孵化中心主楼概念方案设计为例从空间环境、空间秩序和生态设计三方面阐述了项目中空中庭院的设计策略。     

几何与力的逻辑——建筑形态的诗意表现

作为空间艺术的建筑之美,源于其建造的合理逻辑。建筑形态的诗意表现与内在的力学特质存在关联.建造的逻辑体现在如何通过建立建筑形态的几何秩序来表现其力学特质,并创造出富有诗意的建筑形态。展现建筑真实之美有助于提升建筑的艺术品质。     

嘉绍大桥主航道桥最优合龙顺序研究

嘉绍大桥主航道桥是世界上首座六塔、双幅、空间四索面斜拉桥,其有7个合龙口,合龙方案复杂。通过建立采用不同合龙顺序的有限元模型,比较各种合龙顺序下,合龙时所需压重,斜拉索临时调索量;施工过程及成桥时主梁应力、塔偏、索塔应力、斜拉索应力及各种合龙顺序对施工进度、施工安全性的影响,确定最优合龙顺序。     

地下连续墙施工方案及质量措施探讨

本文主要介绍了地下连续墙施工的具体顺序、施工方法及技术措施,并提出了连续墙施工质量的保证措施。     

浅析城乡建设用地增减挂钩规划方法及实证

在当前大力推动我国的城乡统筹发展的背景之下,城乡建设用地的增减挂钩规划工作具有高度的战略意义。本文在介绍挂钩规划原理及方法的基础之上,以山东东明县的情况为例,进行了挂钩规划的实例论证。     

考虑信号相关性的逻辑电路可靠度计算方法

随着集成电路特征尺寸不断缩小,软错误已经成为影响电路可靠性的关键因素.计算软错误影响下逻辑电路的信号概率能辅助评估电路的可靠性.引起逻辑电路信号概率计算复杂性的原因是电路中的扇出重汇聚结构,本文提出一种计算软错误影响下逻辑电路可靠度的方法,使用概率公式和多项式运算,对引发相关性问题的扇出源节点变量作降阶处理,再利用计算得到的输出信号概率评估电路可靠度.用LGSynth91基准电路、74系列电路和ISCAS85基准电路为对象进行实验,结果表明所提方法准确有效.     

基于四阶累积张量方法的欠定盲源信号分离

针对瞬时欠定盲源信号分离问题,提出一种四阶累积张量分解算法.首先构建观察信号四阶累积协方差,依据源信号具有相互独立且均值为零的性质,对累积协方差化简并扩展到张量域,得到四阶累积张量.采用分层交替最小二乘算法对四阶累积张量进行非负库克分解,求得非负库克模型的参数,同时获得非负混合矩阵并求其伪逆,最终估计出源信号.选用真实的语音信号和生物信号进行仿真实验,结果表明该方法提高了源信号和非负混合矩阵的估计性能.     

Salient edge and region aware image retargeting

The purpose of image retargeting is to automatically adapt a given image to fit the size of various displays without introducing severe visual distortions. The seam carving method can effectively achieve this task and it needs to define image importance to detect the salient context of images. In this paper we present a new image importance map and a new seam criterion for image retargeting. We first decompose an image into a cartoon and a texture part. The higher order statistics (HOS) on the cartoon part provide reliable salient edges. We construct a salient object window and a distance dependent weight to modify the HOS. The weighted HOS effectively protects salient objects from distortion by seam carving. We also propose a new seam criterion which tends to spread seam uniformly in nonsallient regions and helps to preserve large scale geometric structures. We call our method salient edge and region aware image retargeting (SERAR). We evaluate our method visually, and compare the results with related methods. Our method performs well in retargeting images with cluttered backgrounds and in preserving large scale structures.     

反射式离轴数字全息再现像中的噪声抑制

为了抑制反射式离轴数字全息再现像中的零级像和散斑噪声对再现像的影响,利用高斯核函数在空域对数字全息图进行低通滤波,再用原数字全息图减去滤波后的低频信息来抑制零级像,采用非局部均值滤波来抑制散斑噪声。实验结果表明空域高斯核函数处理法能有效地抑制零级像,非局部均值滤波可以抑制散斑噪声但对部分细节的保持能力不强,改进后的非局部均值滤波在抑制散斑噪声的同时能很好地保护细节信息,提高了离轴数字全息再现像的质量。     

An adaptive strategy for the bivariate solution of finite element problems using multivariate nested Padé approximants

Most engineering applications involving solutions by numerical methods are dependent on several parameters, whose impact on the solution may significantly vary from one to the other. At times an evaluation of these multivariate solutions may be required at the expense of a prohibitively high computational cost. In the present paper, an adaptive approach is proposed as a way to estimate the solution of such multivariate finite element problems. It is based upon the integration of so‐called nested Padé approximants within the finite element procedure. This procedure includes an effective control of the approximation error, which enables adaptive refinements of the converged intervals upon reconstruction of the solution. The main advantages lie in a potential reduction of the computational effort and the fact that the level of a priori knowledge required about the solution in order to have an accurate, efficient, and well‐sampled estimate of the solution is low. The approach is introduced for bivariate problems, for which it is validated on elasto‐poro‐acoustic problems of both academic and more industrial scale. It is argued that the methodology in general holds for more than two variables, and a discussion is opened about the truncation refinements required in order to generalize the results accordingly. Copyright © 2014 John Wiley & Sons, Ltd.