【摘 要】
：
As the size and complexity of software systems increase,the design and specification of overall system structure become more significant issues than the choice
【机 构】
：
Department of Computer Science and Technology,Peking University,Beijing 100871,China
论文部分内容阅读
As the size and complexity of software systems increase,the design and specification of overall system structure become more significant issues than the choice of algorithms and data structures of computation.An appropriate architecture for a system is a key element of its success.Based on the practice of Jadebird software production line,this paper proposes a software architectural style based on hierarchical message buses,named JB/HMB.In this style,the component model consists of external interfaces,static structure and dynamic behavior,which depicts a component from different aspects.Supported by message buses,components interact with one another by messages,which can be used to describe distributed and concurrent systems well.JB/HMB style supports stepwise decomposition and refinement,and runtime system evolution.Finally,characteristics of JB/HMB style are summarized as a conclusion,and future research directions are specified.``
其他文献
开发前期策划在以往的开发建设实践中 ,并未受到足够的重视 ,理论上也没有得到系统的研究 ,本文着力对产业经济开发区开发前期策划的全过程进行分析研究 ,分别从定义、结构体
An intelligent welding robot for spherical tanks all-position multi-layer welds is developed. Based on the dynamics analyzing and simulation testing, a flexible
目的 观察前列地尔注射液治疗78例肝硬化顽固性腹水的临床疗效.方法 将78例肝硬化失代偿期顽固性腹水患者完全随机分为对照组及治疗组,每组39例.2组均采用护肝、利尿、支持、
目的 观察眼球钝挫伤后轻度晶状体不全脱位的临床特点,探讨超声生物显微镜(UBM)在轻度晶状体不全脱位病例中的应用价值.方法 对本院就诊的30例30跟钝伤性轻度晶状体不全脱位
目的评价癃清片治疗慢性前列腺炎的有效性和安全性。方法多中心、随机、双盲、安慰剂对照临床设计。480例湿热兼瘀血型慢性前列腺炎患者按3:1的比例随机分为治疗组、安慰剂对
Oxygen is introduced into the sulfurized isobutylene by compounding the sulfurized isobutylene with thioester. This paper studies the synergistic effect of comm
目的 比较经阴道超声(TVS)及经腹部超声(TAS)对子宫肌瘤的诊断价值.方法 由两名有经验的医师,以双盲法分别对82例患者行TVS及TAS检查,并与手术、病理结果对照.结果 对82例子
经外周静脉置入中心静脉导管(peripherally inserted central catheter,PICC)是指采用引导针经外周静脉穿刺,将一根由硅胶材料制成、标有刻度、能以放射显影的中心静脉导管插
护理工作是医院工作的重要组成部分,护理行为贯穿患者住院的全过程.在医疗事故争议中,护理行为缺陷是双方关注的焦点之一,是医疗机构在诉讼中需要举证证明没有医疗过错的重要
目的 了解阴道炎患者自我管理能力对疾病复发的影响,以采用有效的护理干预降低患者疾病的复发.方法 将300例阴道炎患者随机分为实验组和对照组各150例,在相同药物治疗的同时,