2008 Peck Lecture: The Observational Method: Case History and Models

The observational method was used to design and construct an embankment over a deposit of soft sludge. The first part of the paper describes the case history of the project. The second part describes the use of analytical models as part of the observational method. The finite-element method and one-dimensional consolidation solution were used as prediction models. Bayesian updating was used to revise the material properties with observed performance. Advantages and limitations of updating are presented.     

《Excel在经济管理中的应用》课程建设的思考与探讨

《Excel在经济管理中的应用》是一门融理论与实践操作为一体并以实践操作为主的课程,通过学习旨在提高学生应用计算机解决实际问题的能力和动手操作能力,为今后学习及从事实践工作打下坚实的基础。从课程的理论基础、教学模式、实验教学、考试方式等方面对课程的建设进行探讨。     

基于图像处理的野外金属破片靶测量研究

为解决野外破片战斗部爆破试验中大型靶板毁伤面积人工测量低效且工作量巨大的问题,提出基于逆透视变换图像矫正、均值-中值组合滤波的2D-Otsu鲁棒阈值分割、膨胀腐蚀开闭运算、邻域搜索生长法等图像处理技术,进行靶板毁伤区识别,实现了破片靶图高精度面积测量,克服了野外靶图取景畸变、锈蚀、金属纹理等影响测量精度问题。该方法针对野外金属破片靶的孔洞数量统计及面积测量具有稳定易用易部署的优势。     

Retesting of Liquefaction and Nonliquefaction Case Histories from the 1976 Tangshan Earthquake

A field investigation was performed to retest liquefaction and nonliquefaction sites from the 1976 Tangshan earthquake in China. These sites were carefully investigated in 1978 and 1979 by using standard penetration test (SPT) and cone penetration test (CPT) equipment; however, the CPT measurements are obsolete because of the now nonstandard cone that was used at the time. In 2007, a modern cone was mobilized to retest 18 selected sites that are particularly important because of the intense ground shaking they sustained despite their high fines content and/or because the site did not liquefy. Of the sites reinvestigated and carefully reprocessed, 13 were considered accurate representative case histories. Two of the sites that were originally investigated for liquefaction have been reinvestigated for cyclic failure of fine-grained soil and removed from consideration for liquefaction triggering. The most important outcome of these field investigations was the collection of more accurate data for three nonliquefaction sites that experienced intense ground shaking. Data for these three case histories is now included in an area of the liquefaction triggering database that was poorly populated and will help constrain the upper bound of future liquefaction triggering curves.     

全过程多维度的《数据库技术及应用》课程拓展资源库设计与研究

利用精品资源共享平台建设《数据库技术及应用》课程拓展资源库，以就业岗位需求为目标，针对高职学生的特点，从企业级实际应用的具体技术问题出发，科学合理地设计案例项目。以“实用、够用”为准则组织适合岗位技能需求和高职学生实际水平的拓展资源，并结合技能鉴定和考证需要，设计各种认证资源。     

A knowledge-based intelligent framework for anterior cruciate ligament rehabilitation monitoring

This study presents an integration of knowledge-based system and intelligent methods to develop a recovery monitoring framework for post anterior cruciate ligament (ACL) injured/reconstructed subjects. The case based reasoning methodology has been combined with fuzzy clustering and intelligent classification techniques in order to develop a knowledge base and a learning model for identifying the recovery stage of ACL-reconstructed subjects and objectively monitoring the progress during the convalescence regimen. The system records kinematics and neuromuscular signals from lower limbs of healthy and ACL-reconstructed subjects using self adjusted non-invasive body-mounted wireless sensors. These bio-signals are synchronized and integrated, and a combined feature set is generated by performing data transformation using wavelet decomposition and feature reduction techniques. The knowledge base stores the subjects’ profiles, their recovery sessions’ data and problem/solution pairs for different activities monitored during the course of rehabilitation. Fuzzy clustering technique has been employed to form the initial groups of subjects at similar stage of recovery. In order to classify the recovery stage of subjects (i.e. retrieval of similar cases), adaptive neuro-fuzzy inference system (ANFIS), fuzzy unordered rule induction algorithm (FURIA) and support vector machine (SVM) have been applied and compared. The system has been successfully tested on a group of healthy and post-operated athletes for analyzing their performance in two activities (ambulation at various speeds and one leg balance testing) selected from the rehabilitation protocol. The case adaptation and retention is a semi-automatic process requiring input from the physiotherapists and physiatrists. This intelligent framework can be utilized by physiatrists, physiotherapists, sports trainers and clinicians for multiple purposes including maintaining athletes’ profile, monitoring progress of recovery, classifying recovery status, adapting recovery protocols and predicting/comparing athletes’ sports performance. Further, the knowledge base can easily be extended and enhanced for monitoring different types of sports activities.     

Routine reconfiguration in traditional companies’ e-commerce strategy implementation: A trajectory perspective

This study explores the roles of routine reconfiguration in traditional companies’ e-commerce strategy implementation. Drawing on the conceptualization of “routine as trajectory”, in which routines are viewed as trajectories of interdependent actions through which organizations accomplish much of what they do, we investigate the interactions between the components of a trajectory, i.e., the trajectory projection, trajectory scheme, and trajectory action. A case study was conducted on the largest Chinese home appliance manufacturer attaining an e-commerce capability. Three roles of routine reconfiguration and their underlying mechanisms were identified. The study's theoretical contribution and practical implications and future research directions are discussed.     

反潜直升机吊声搜潜悬停探测飞行模型

针对反潜直升机使用吊声搜潜时需悬停探测的问题,基于反潜直升机悬停探测飞行过程、最短飞行路径准则和几何原理,规划反潜直升机悬停探测飞行路径,并考虑风对反潜直升机飞行状态的影响。对建立的飞行路径进行了数学求解与分析,最终给出悬停探测飞行数学模型。根据建立的悬停探测飞行数学模型,对单机圆形应召搜潜的飞行路径进行仿真验证,仿真结果表明,悬停探测飞行数学模型可以更加真实地模拟反潜直升机吊声搜潜的实际飞行路径。     

扇形浮标阵跟踪反潜背景下无人机监听航路的研究

航空反潜时,无人机代替有人机对浮标阵进行监听是无人机在未来战场上的重要应用之一。以无人机独立执行监听浮标阵任务为背景,在对跟踪搜潜时浮标阵的布设进行分析并提出无人机航路的代价函数后,根据浮标阵的特点,规划出无人机矩形监听浮标阵方案,并对所规划航路的技术指标进行了分析,最后,通过仿真对此方案进行了验证。仿真结果表明方案可行,为无人机监听浮标阵的实际应用提供了理论决策依据。     

面向多级调度管理的融合型搜索引擎

云计算、物联网、社交网络等新兴服务模式的产生与发展,使得数据转变为一种基础资源,面向数据管理和取用的信息检索技术的重要性不断提高。结合调度管理业务的典型搜索需求,文中将信息服务模式的技术特征应用于调度管理领域,提出一种面向大电网多级调度管理一体化的融合型搜索引擎设计方法。该方法通过对不同类型数据的搜索集成,实现了分布式环境下的异构数据资源整合。针对所述算法进行了实验仿真和原型验证,对搜索算法进行了可行性评估和应用展望。