上海世博和谐塔风荷载参数数值风洞模拟

采用数值风洞技术数值模拟上海世博和谐塔的绕流场,获得了三维复杂结构的绕流场和风荷载参数。充分结合现有的计算技术和硬件计算能力,把整体结构的数值模拟分解为核心圆筒加外围弧形铝板部分,以及桁架体系部分。利用前者得到的等效局部风环境来评估桁架体系的风荷载,从而得到整体的风荷载参数。通过与物理风洞的试验结果进行对比可以认为数值风洞的结果是可信的。     

Estimating optimum parameters of tuned mass dampers using harmony search

In this paper, the optimum parameters of tuned mass dampers (TMD) are proposed under seismic excitations. Harmony search (HS), a metaheurestic optimization method, which has been successfully applied for several engineering problems, is revised for tuning passive mass dampers. A Matlab program is developed for numerical optimization and time domain simulation. Optimization criteria are the peak values of first storey displacement and acceleration transfer function. In order to find best results, all properties of TMD are searched. For a fast and general optimization, a harmonic loading is utilized for numerical iterations. Also, final TMD parameters are checked under earthquake excitations. This new approach is compared with several other documented methods. Comparisons show that the new approach is more effective than other documented methods and more feasible due to smaller TMD parameters.     

数控弧齿锥齿轮磨齿机主轴系统的谐响应分析

采用有限元分析软件ANSYS ,对YK2 0 4 5型数控弧齿锥齿轮磨齿机主轴系统进行了谐响应分析 ,得出特定工况及不同主轴系统几何参数下的位移频率响应曲线 ,分析了跨距和支承刚度对主轴系统抗振性的影响 ,论文为对主轴系统动态性能的进一步深入研究提供了基础。     

认知无线电网络中基于和声搜索的频谱分配与功率控制

针对认知无线电网络中功率控制和频谱分配过程存在互相影响的问题,提出一种基于和声搜索的频谱分配和功率控制算法。通过综合分析频谱分配和功率控制过程中的各种约束条件,建立了联合功率控制和频谱分配的系统模型。算法根据系统模型特点设计和声搜索算法下相应编码方案,采用多目标优化方法处理复杂的约束条件,并赋予可行解适当的优先权重。仿真实验表明,算法可以很好地解决认知无线电网络中的频谱分配和功率控制问题。     

创建和谐、共享、舒适之家园——东湖豪门住宅小区规划与建筑设计

本文以宁德东湖豪门住宅小区规划和建筑设计为例,从建筑布局、户外空间组织、绿化环境景观设计和建筑套内空间、单体设计等方面来探讨创造一个符合人的生活规律并具有较好的舒适性、方便性,体现和谐,共享的人居环境。     

产品设计中的形态相关性研究

为解决产品设计中形态的相关与协调问题,采用几何变换的方法,提出处理此类问题的一种观点.并从量化和可控性的角度入手,提供了解决形态协调性的有效途径.     

Improved non-maximum suppression for object detection using harmony search algorithm

Non-maximum suppression (NMS) plays a key role in many modern object detectors. It is responsible to remove detection boxes that cover the same object. NMS greedily selects the detection box with maximum score; other detection boxes are suppressed when the degree of overlap between these detection boxes and the selected box exceeds a predefined threshold. Such a strategy easily retain some false positives, and it limits the ability of NMS to perceive nearby objects in cluttered scenes. This paper proposes an effective method combining harmony search algorithm and NMS to alleviate this problem. This method regards the task of NMS as a combination optimization problem. It seeks final detection boxes under the guidance of an objective function. NMS is applied to each harmony to remove imprecise detection boxes, and the remaining boxes are used to calculate the fitness value. The remaining detection boxes in a harmony with highest fitness value are chosen as the final detection results. The standard Pattern Analysis, Statistical Modeling and Computational Learning Visual Object Classes dataset and the Microsoft Common Objects in Context dataset are used in all of the experiments. The proposed method is applied to two popular detection networks, namely Faster Region-based Convolutional Neural Networks and Region-based Fully Convolutional Networks. The experimental results show that the proposed method improves the average precision of these two detection networks. Moreover, the location performance and average recall of these two detectors are also improved.     

深度置信网络优化模型在人才评价中的应用

针对深度置信网络(DBN)权值随机初始化容易使网络陷入局部最优的问题,引入改进的和声搜索(IHS)算法,提出基于IHS的DBN模型(IHS-DBN)。在和声搜索算法的基础上,利用全局自适应的和声音调调整方式,提升算法收敛速度和后期局部搜索能力。将DBN重构误差函数作为IHS算法的优化目标函数,通过不断迭代优化解向量为DBN寻找一组较优的初始权值进行网络训练,并在MNIST数据集上验证IHS-DBN模型的有效性。IHS-DBN模型在高校人才评价中的应用结果表明,与DBN、SVM和BP神经网络评价模型相比,IHS-DBN模型的评价准确率分别提高3.6%、7.3%和16.4%。     

浅谈和谐校园文化建设

一个学校要想生存和蓬勃发展下去,必须遵循和谐发展的原则。近几年,培训中心大力开展校园文化建设,并与思想政治工作、精神文明建设一道,功能叠加,优势互补,共同推进了培训中心的创建与筹办、进步与发展。阐述了和谐校园文化建设必须坚持物质文化、制度文化、精神文化三位一体合力推进,文化的传播与培育普及而深入,才能形成以“和谐”为总...     

海外石油工程服务公司运行实践

近年来,随着我国国民经济的高速发展,石油的需求迅速增加,而国内石油产量增加有限。为了满足国内的石油消费需求,国家鼓励石油类企业实施＂走出去＂战略,广泛开展国际合作,为此带动了石油工程服务企业进入海外石油工程服务领域。如何运作好海外项目,使其效益最大化是海外石油工程服务企业的关键所在。