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程杭 《电子制作.电脑维护与应用》2015,(7)
目前,治疗恶性肿瘤的一种有效手段是肿瘤放射治疗,医用直线加速器是放射治疗最常用的设备。医用直线加速器作为高精度且大型的医疗设备涉及很多科学与技术领域,例如微波理论及其测量技术,计算机技术,光学,高能物理,电真空度技术等学科。因而,医用直线加速器的维修与维护人员应该有相应的专业知识以及很强的工作能力,同时对于机器的调试,操作以及测量都要熟练的掌握。在实践中,直线加速器的故障率比较高,故障会延误病人治疗的最佳时机,因此,要保证直线加速器的正常运行,就必须对其进行定期的维修与养护。 相似文献
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对于肿瘤的放射治疗,医用直线加速器愈来愈成为重要的治疗仪器.在日常的使用过程中,其出现各种故障在所难免,但只要处理得当,仪器很快就能恢复正常.在日常维修过程中,发现以下两例故障. 相似文献
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标准化工作是建立包括企业技术标准体系、管理标准体系和工作标准体系三个部分的企业标准文件体系,并对标准执行进行监督与考核,不断完善和修订标准文件,为企业实现标准化管理和达到持续改进的目标奠定基础。随着企业信息化的发展,以电子文档为基础的标准化流程系统大大提高了企业标准化工作的效率,但也产生了保护标准化过程中的电子文档安全性的问题,文章基于该安全问题设计了一套保护标准化流程中电子文档安全的系统。 相似文献
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杨曦 《电脑编程技巧与维护》2021,(12):54-57
为强化财务核算标准化、夯实财务运营基础,需要将财务标准流程与信息化系统相配合,让财务流程信息化.就财务标准化流程系统建设中存在的相关问题进行了简要地探索与分析,结合模块化思想的应用,阐述了建设高效易维护的财务标准化流程系统的思路. 相似文献
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基于知识图谱的问答系统可以解析用户问题,已成为一种检索知识、自动回答所询问题的有效途径.知识图谱问答系统通常是利用神经程序归纳模型,将自然语言问题转化为逻辑形式,在知识图谱上执行该逻辑形式能够得到答案.然而,使用预训练语言模型和知识图谱的知识问答系统包含两个挑战:(1)给定问答(questionanswering, QA)上下文,需要从大型知识图谱(knowledge graph, KG)中识别相关知识;(2)对QA上下文和KG进行联合推理.基于此,提出一种语言模型驱动的知识图谱问答推理模型QA-KGNet,将QA上下文和KG连接起来形成一个工作图,使用语言模型计算给定QA上下文节点与KG节点的关联度,并使用多头图注意力网络更新节点表示.在Commonsense QA、OpenBookQA和Med QA-USMLE真实数据集上进行实验来评估QA-KGNet的性能,实验结果表明:QA-KGNet优于现有的基准模型,表现出优越的结构化推理能力. 相似文献
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Porter A. Yilmaz C. Memon A.M. Schmidt D.C. Natarajan B. 《IEEE transactions on pattern analysis and machine intelligence》2007,33(8):510-525
Software engineers increasingly emphasize agility and flexibility in their designs and development approaches. They increasingly use distributed development teams, rely on component assembly and deployment rather than green field code writing, rapidly evolve the system through incremental development and frequent updating, and use flexible product designs supporting extensive end-user customization. While agility and flexibility have many benefits, they also create an enormous number of potential system configurations built from rapidly changing component implementations. Since today's quality assurance (QA) techniques do not scale to handle highly configurable systems, we are developing and validating novel software QA processes and tools that leverage the extensive computing resources of user and developer communities in a distributed, continuous manner to improve software quality significantly. This paper provides several contributions to the study of distributed, continuous QA (DCQA). First, it shows the structure and functionality of Skoll, which is an environment that defines a generic around-the-world, around-the-clock QA process and several sophisticated tools that support this process. Second, it describes several novel QA processes built using the Skoll environment. Third, it presents two studies using Skoll: one involving user testing of the Mozilla browser and another involving continuous build, integration, and testing of the ACE+TAO communication software package. The results of our studies suggest that the Skoll environment can manage and control distributed continuous QA processes more effectively than conventional QA processes. For example, our DCQA processes rapidly identified problems that had taken the ACE+TAO developers much longer to find and several of which they had not found. Moreover, the automatic analysis of QA results provided developers information that enabled them to quickly find the root causes of problems 相似文献
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数字资源管理系统的设计与实施方案 总被引:1,自引:0,他引:1
薛辉明 《数字社区&智能家居》2006,(3):26-26,133
数字图书馆建设的关键是建设并合理的管理数字资源。本文提出一个图书馆的数字化资源管理的方案。该方案可以对文本、超文本、图像、动画、科学数据等多种形式的文档进行数字资源采集,进而进行规范性地加工、保存、管理采创建数字资源。最后提供在互联网上的发布与检索服务来进行数字资源传递。 相似文献
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薛辉明 《数字社区&智能家居》2006,(8)
数字图书馆建设的关键是建设并合理的管理数字资源。本文提出一个图书馆的数字化资源管理的方案。该方案可以对文本、超文本、图像、动画、科学数据等多种形式的文档进行数字资源采集,进而进行规范性地加工、保存、管理来创建数字资源,最后提供在互联网上的发布与检索服务来进行数字资源传递。 相似文献
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Mario Gleirscher Dmitriy Golubitskiy Maximilian Irlbeck Stefan Wagner 《Software Quality Journal》2014,22(3):499-542
Today, small- and medium-sized enterprises (SMEs) in the software industry face major challenges. Their resource constraints require high efficiency in development. Furthermore, quality assurance (QA) measures need to be taken to mitigate the risk of additional, expensive effort for bug fixes or compensations. Automated static analysis (ASA) can reduce this risk because it promises low application effort. SMEs seem to take little advantage of this opportunity. Instead, they still mainly rely on the dynamic analysis approach of software testing. In this article, we report on our experiences from a technology transfer project. Our aim was to evaluate the results static analysis can provide for SMEs as well as the problems that occur when introducing and using static analysis in SMEs. We analysed five software projects from five collaborating SMEs using three different ASA techniques: code clone detection, bug pattern detection and architecture conformance analysis. Following the analysis, we applied a quality model to aggregate and evaluate the results. Our study shows that the effort required to introduce ASA techniques in SMEs is small (mostly below one person-hour each). Furthermore, we encountered only few technical problems. By means of the analyses, we could detect multiple defects in production code. The participating companies perceived the analysis results to be a helpful addition to their current QA and will include the analyses in their QA process. With the help of the Quamoco quality model, we could efficiently aggregate and rate static analysis results. However, we also encountered a partial mismatch with the opinions of the SMEs. We conclude that ASA and quality models can be a valuable and affordable addition to the QA process of SMEs. 相似文献
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Dongsheng Wang 《Frontiers of Computer Science in China》2011,5(4):405-418
Contextual question answering (CQA), in which user information needs are satisfied through an interactive question answering
(QA) dialog, has recently attracted more research attention. One challenge is to fuse contextual information into the understanding
process of relevant questions. In this paper, a discourse structure is proposed to maintain semantic information, and approaches
for recognition of relevancy type and fusion of contextual information according to relevancy type are proposed. The system
is evaluated on real contextual QA data. The results show that better performance is achieved than a baseline system and almost
the same performance as when these contextual phenomena are resolved manually. A detailed evaluation analysis is presented. 相似文献
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通过基于三维数字化模型的装配工艺仿真技术,实现基于航空发动机低压涡轮模型在可视化的数字环境中的装配路径规划、装配分析和装配仿真,以验证产品的可装配性及其工艺过程,从而能及时发现产品设计和工艺规划中的缺陷与错误,从而进行改进。民用航空发动机数字化装配仿真分析研究,为下阶段仿真技术研究的体系化与标准化建设奠定了基础。 相似文献
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针对常见问答系统采用的以词法分析为基础的浅层语义模型难以有效挖掘用户问句深层语义的问题,本文立足于旅游问答应用领域,采用组合范畴语法对旅游问句进行句法分析,使用Lambda演算式表示问句语义,以此构建旅游领域问句的语义模型,以便于通过精确的问句语义快速查找应答结果.研究首先进行旅游领域数据采集与语料标注的准备性工作,并针对语料对旅游问句的句式句法进行分析;然后采用基于概率的组合范畴语法的监督学习过程,通过训练获得较为可靠的旅游问句语义词典;最后根据语义词典及其他相关知识,学习用户问句语义,构建旅游自动应答语义分析系统,着重于问句解析和相应的语义模型的构建.通过在评测集上的验证,这种语义解析方法在解析效果上有比较明确的提升. 相似文献