基于消息的单片机编程方法   总被引：1，自引：0，他引：1  

贺海峰 《广西大学梧州分校学报》2005,15(1):83-84

在单片机MCS-51的开发运用中，通常要使用各种中断。如中断服务程序执行时间过长，当有另外的中断发生时，单片机就不能及时地进行处理，特别是对MCS-51这样的只有两级中断优先级的单片机更是这样。借鉴Windows编程的原理，在单片机编程中引入消息的概念，将中断产生的标志作为消息，而数据处理则放在消息循环中进行，这样一方面减少了中断服务程序的长度，提高了响应中断的速度；另一方面又不影响数据的处理。  相似文献   

Deterioration of Yungang Grottoes: Diagnosis and research   总被引：2，自引：0，他引：2  

Ren Zhi Liu  Bing Jian Zhang  Hui Zhang  Mei Feng Shi 《Journal of Cultural Heritage》2011,(4):494

Yungang Grottoes, in Datong City of Shanxi Province, China, as the state-level key cultural relic preservation organ, have been subjected to severe degradation due to natural and human factors over the years. Since January 2010, site investigation and research on Yungang Grottoes, assisted by the Xi’an Relics Protection Center and Yungang Grottoes Cultural Research Institute, have been carried out in the laboratory of cultural relics conservation materials in Zhejiang University. Our investigation of the deterioration characteristics of these grottoes is presented here. The paper describes about 12 types of diseases in detail represented by dust deposit, salt crystallization and black crust. Relevant samples have been collected and analyzed by means of SEM, FT-IR, XRD and EDAX to study the potential hazard to the sandstones and conservation methods, which could be used to help guide remediation efforts directed at reducing the weathering problem.  相似文献   

A multilevel approach for the damage assessment of Historic masonry towers     

Anna Anzani  Luiga Binda  Alberto Carpinteri  Stefano Invernizzi  Guiseppe Lacidogna 《Journal of Cultural Heritage》2010,11(4):387-470

In the paper some case studies of damaged towers in Italy are presented: the Tower Masserano of Palace Ferrero - La Marmora at Biella, the bell tower of the Collegiata of San Vittore at Arcisate, and three medieval towers in Alba. A methodology is put forward for combining laboratory and nondestructive testing methods with monitoring systems in order to reach the goal of evaluating the state of conservation of historic towers and its evolution in time.  相似文献   

电喷发动机燃油压力与燃油供给系统故障诊断     

姜伦 《湖南民族职业学院学报》2007,(1)

电喷发动机燃油供给系统的油压高低直接影响燃油喷射的精确性,从而影响发动机的工作性能,本文通过对燃油供给系统组成与结构分析,论述燃油压力异常对发动机工作性能的影响,采用测试燃油压力方法来判断燃油供给系统的故障。  相似文献   

浅析民航多普勒气象雷达在江西空管的应用     

晏珂 《科技广场》2014,(1):120-125

本文对民航江西空管分局新引进安装的多普勒气象雷达系统在运行中的应用经验进行了归纳总结。首先概述了该型雷达的主要特点,之后介绍了主要故障的判断处理方法,最后对日常维护提出建议,并介绍两个配套软件的使用以及相关应用程序的开发。  相似文献   

儿童半月板损伤的诊断与手术效果     

杨泉森  王粉娣 《浙江体育科学》1994,(1)

作者报道了1957～1990年间收治并经手术证实儿童半月板损伤的48例临床资料.着重评价了传统诊断方法的要点及价值,讨论了仪器检查的价值与适应症.随诊1～36年.虽然临床疗效比较理想,但术后关节退变出现早而严重,故对儿童半月板全切除术应持慎重态度.藉助关节镜早期诊断和治疗,最大限度保留半月板是努力方向.  相似文献   

羽毛球肩袖损伤的研究   总被引：1，自引：0，他引：1  

刘智英  郑学军 《福建体育科技》2009,28(3):33-35

如何有效地预防损伤的发生，是提高羽毛球运动水平所面临的一项迫切任务，而探索各种损伤的发生原因及特点，对有效防治羽毛球运动损伤有重要意义。本文结合肩袖的解剖结构及其在羽毛球项目中的运动特点，分析了肩袖损伤的发病原因、症状和常用的处理方法、预防措施，为提高羽毛球竞技训练水平和普及全民健身提供理论依据。  相似文献   

Patterns of contingent teaching in teacher-student interaction     

Janneke van de Pol  Monique VolmanJos Beishuizen 《Learning and Instruction》2011,21(1):46-57

The present study aimed at investigating the process of scaffolding in a naturalistic setting with focus on a key aspect of scaffolding, namely contingency. Three Social Studies teachers in innovative prevocational schools were observed and interviewed. A coding scheme for the measurement of scaffolding was developed which revealed different patterns of contingent and non-contingent teaching amongst the teachers. In general these teachers of innovative schools showed little contingent teaching. Not adapting the support to students' current understanding and barely diagnosing the students' understanding appeared to be characteristic of this scarcity of non-contingent teaching.  相似文献   

模糊聚类在规则空间中的应用     

胡小松  罗芬 《科技广场》2011,(1):9-11

规则空间是一种用来识别被试认知错误类型的数学模型,但其分类标准(参照点)一直依赖专家根据经验在测试前手工确定,使用难度太高,无法大规模普及使用。本文使用模糊聚类方法在测试后辅助确定规则空间中的参考点,使得普通教育工作者也能借助计算机使用规则空间模型。  相似文献   

Uncertainty and the inconvenient facts of diagnosis     

Annemarie Jutel 《Endeavour》2021,45(1-2):100764

One common contemporary usage of the term “diagnostic uncertainty” is to refer to cases for which a diagnosis is not, or cannot, be applied to the presenting case. This is a paradoxical usage, as the absence of diagnosis is often as close to a certainty as can be a human judgement. What makes this sociologically interesting is that it represents an “epistemic defence,” or a means of accounting for a failure of medicine’s explanatory system. This system is based on diagnosis, or the classification of individual complaints into recognizable diagnostic categories. Diagnosis is pivotal to medicine’s epistemic setting, for it purports to explain illness via diagnosis, and yet is not always able to do so. This essay reviews this paradoxical use, and juxtaposes it to historical explanations for non-diagnosable illnesses. It demonstrates how representing non-diagnosis as uncertainty protects the epistemic setting by positioning the failure to locate a diagnosis in the individual, rather than in the medical paradigm.  相似文献