期刊文献+
共找到7篇文章
< 1 >
每页显示 20 50 100
"Trades" and "Social Membership" into the Context of Feudal Friulian Society during Late Middle Ages (13th Century- 1511)
1
作者 Marco Sicuro 《Journal of Philosophy Study》 2017年第5期269-274,共6页
It is a very hard job for historians to keep themselves neutrals in from of the events they find during their studies. It is also difficult to notice the correlations among the different times of the history without f... It is a very hard job for historians to keep themselves neutrals in from of the events they find during their studies. It is also difficult to notice the correlations among the different times of the history without falling in anachronistic mistakes. In fact, it is well-known that a historian must be wise and rational when he finds those correlations, because every society has its own characteristics, structures, and mentality. This brief essay focuses on the social structures in a north eastern italic region, which is called Friuli, between the 12th and 16th centuries. In the above mentioned centuries, it is possible to notice an evolution from a feudal ecclesiastical principality, ruled by prince-patriarchs, ecclesiastical institutions and nobility, to a more fluid and dynamic constitution formed by new classes which rose up in times of urban and economic development. But this development struggles to delete the old system, which persisted until the end of 18th century with the arrival of Napoleon. The transition from the Patriarch's power to Venice's dominion seems to have created two main consequences: by one hand a more bureaucratic and modem structure of the State, by the other hand a consolidation of the old connections between patrons and clients, consequence of the "modem" feudal system that consolidated its roots in the Late Middle Ages centuries. 展开更多
关键词 Medieval History Early Modem Period History of friuli Cruel Fat Thursday History of Society Patronage System
下载PDF
改进弗留格尔公式用于汽轮机故障诊断 被引量:1
2
作者 张春杰 李振林 +2 位作者 李世尧 李折 杨银山 《北京石油化工学院学报》 2014年第4期26-28,共3页
汽轮机作为动力机械广泛应用于电力、化工等多个行业,汽轮机故障诊断也愈来愈受到人们的重视。气路通流面积作为汽轮机故障诊断的重点,能够通过弗留格尔公式计算得到。由于该公式假设条件是汽轮机有无穷级,故在实际应用中该公式的精度... 汽轮机作为动力机械广泛应用于电力、化工等多个行业,汽轮机故障诊断也愈来愈受到人们的重视。气路通流面积作为汽轮机故障诊断的重点,能够通过弗留格尔公式计算得到。由于该公式假设条件是汽轮机有无穷级,故在实际应用中该公式的精度不高。笔者对弗留格尔公式进行改进并将其应用于汽轮机通流部分故障诊断,以此来提高诊断精度。 展开更多
关键词 汽轮机 弗留格尔公式 临界压比 故障诊断
下载PDF
喷嘴配汽汽轮机主蒸汽流量计算方法的研究 被引量:4
3
作者 陈飞翔 胥建群 马琳 《发电设备》 2015年第1期24-26,39,共4页
依据弗留格尔公式,结合现场试验与理论计算,对喷嘴配汽汽轮机主蒸汽压力和流量的关系进行了修正,确定某300 MW喷嘴配汽汽轮机组主蒸汽流量和压力的修正关系式,并进行了验证。结果表明:所提出的公式具有较高的精度和工程实用价值。
关键词 汽轮机 DEH 流量压力特性 弗留格尔公式 性能试验
下载PDF
Archaeoacoustics Analysis and Ceremonial Customs in an Ancient Hypogeum 被引量:1
4
《Sociology Study》 2013年第10期803-814,共12页
The archeaoacoustic properties and the historical rituals of two ancient unaergrounu ~Ly~,u~ ~,~ v Malta is more widely known and researched; the second in Italy has been studied by SB Research Group (SBRG] and prese... The archeaoacoustic properties and the historical rituals of two ancient unaergrounu ~Ly~,u~ ~,~ v Malta is more widely known and researched; the second in Italy has been studied by SB Research Group (SBRG] and presents some similarities to the Maltese hypogeum. The results show that archaeoacoustics is an interesting new method for reanalyzing ancient sites, and it uses different study parameters to re-discover forgotten technology which operates on the human emotional sphere. The effect on the psyche of ancient people through the acoustic proprieties suggests that the builders of these sites had knowledge of this process and probably used it to enhance their rituals. 展开更多
关键词 Archaeoacustics infrasounds low frequencies Malta Cividale del friuli hypogeum
下载PDF
提高主蒸汽流量间接测量计算精度方法的探讨 被引量:3
5
作者 方超 《热力透平》 2012年第1期60-65,共6页
主蒸汽流量间接测量法已在现代大型机组上广泛采用,但还存在一些问题,使其精度受到限制。为提高主蒸汽流量计算准确性,对其流量构成进行了分解;为解决调节级后无蒸汽温度测点问题,结合试验实例提出了温度替代和弗留格尔公式改进办法;为... 主蒸汽流量间接测量法已在现代大型机组上广泛采用,但还存在一些问题,使其精度受到限制。为提高主蒸汽流量计算准确性,对其流量构成进行了分解;为解决调节级后无蒸汽温度测点问题,结合试验实例提出了温度替代和弗留格尔公式改进办法;为解决通流面积变化问题,采用试验数据提出了用级组压比变化来表征通流系数变化的新思路,并对流量计算公式进行了误差分析。研究表明,用弗留格尔改进型公式来计算高压缸压力级级组流量误差较小,给出了主蒸汽流量间接测量推荐公式,可供相关电厂借鉴。 展开更多
关键词 主蒸汽流量 间接测量 弗留格尔公式 通流系数 压比
下载PDF
汽轮机主蒸汽流量计算方法探讨 被引量:4
6
作者 关胜涛 《东北电力技术》 2017年第2期47-48,共2页
大容量机组主蒸汽流量的测量大部分采用弗留格尔公式,即通过汽轮机调节级压力加温度修正间接换算法来得到主蒸汽流量,当调节级温度测量不准确时,利用不同级段参数分别计算主蒸汽流量。通过应用探讨分析,利用其它级段参数计算的主蒸汽流... 大容量机组主蒸汽流量的测量大部分采用弗留格尔公式,即通过汽轮机调节级压力加温度修正间接换算法来得到主蒸汽流量,当调节级温度测量不准确时,利用不同级段参数分别计算主蒸汽流量。通过应用探讨分析,利用其它级段参数计算的主蒸汽流量与调节级参数计算出的主蒸汽流量接近,可以用于在调节级参数发生异常时取代其进行计算,或者是当计算得到的主蒸汽流量差别较大时,可以判断机组通流部分发生变化。 展开更多
关键词 汽轮机组 弗留格尔公式 主蒸汽流量
下载PDF
应用弗留格尔公式分析速度级汽压代替主汽流量测量问题 被引量:4
7
作者 张渡 楚岩 《河南电力》 2009年第2期28-29,共2页
用弗留格尔公式分析了速度级汽压代替主汽流量测量的有关问题,澄清了该问题中的许多疑问,为有关专业人员提供了清晰的思路。
关键词 主汽流量测量 速度级汽压 弗留格尔公式 近似代替
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部