With the continuous development and wide application of modern technology,more enterprises and institutions in our country have begun to strengthen the research and manufacturing of intelligent elevators,aiming to bui...With the continuous development and wide application of modern technology,more enterprises and institutions in our country have begun to strengthen the research and manufacturing of intelligent elevators,aiming to build a new mode of modern manufacturing with the concept of green development as the core.Therefore,this paper takes green manufacturing as the background,analyzes the design significance of intelligent elevator lightweight,expounds its design ideas,and in the end introduces its specific design practice path.展开更多
The aim of the study is to simulate actual operation of an elevator. First, it designed elevator scheduling algorithm for control ing operation of the elevator;second, it simulated elevator operation by the use of obj...The aim of the study is to simulate actual operation of an elevator. First, it designed elevator scheduling algorithm for control ing operation of the elevator;second, it simulated elevator operation by the use of object-oriented programming language, in which double buffering technology was used to solve the problem of elevator pictures flicker at refreshing; final y, test correctness and rationality of the system.展开更多
Elevators are one of the most important elements of vertical communication used in buildings.Especially in recent times,where high and high rise buildings have become a modern architectural phenomenon and the spread o...Elevators are one of the most important elements of vertical communication used in buildings.Especially in recent times,where high and high rise buildings have become a modern architectural phenomenon and the spread of architecture has become a feature of the age.Hence,the research discusses the technique of installing elevators in buildings.A general introduction to elevators and their types will be discussed,as well as a historical overview of the beginning of the idea of the elevator and the first buildings that were used.The technique of installing the elevator inside the building explained with the images shown components elevator.Also it will mention several speeds of modern elevators used in buildings,the world’s fastest elevator,ultra-rope technology and the reasons for choosing this technique in elevator components in high-rise buildings which may be used in the space elevator that will connect earth and space.As well it shows features of the wire used in the elevators of the Burj-Khalifa,the highest skyscraper in the world.Then it mentions a number of the most recent and newest elevators in the world,then research results and references.展开更多
文摘With the continuous development and wide application of modern technology,more enterprises and institutions in our country have begun to strengthen the research and manufacturing of intelligent elevators,aiming to build a new mode of modern manufacturing with the concept of green development as the core.Therefore,this paper takes green manufacturing as the background,analyzes the design significance of intelligent elevator lightweight,expounds its design ideas,and in the end introduces its specific design practice path.
基金Supported by the Principal Fund Project of Tarim University(TDZKSSZD201207)~~
文摘The aim of the study is to simulate actual operation of an elevator. First, it designed elevator scheduling algorithm for control ing operation of the elevator;second, it simulated elevator operation by the use of object-oriented programming language, in which double buffering technology was used to solve the problem of elevator pictures flicker at refreshing; final y, test correctness and rationality of the system.
文摘Elevators are one of the most important elements of vertical communication used in buildings.Especially in recent times,where high and high rise buildings have become a modern architectural phenomenon and the spread of architecture has become a feature of the age.Hence,the research discusses the technique of installing elevators in buildings.A general introduction to elevators and their types will be discussed,as well as a historical overview of the beginning of the idea of the elevator and the first buildings that were used.The technique of installing the elevator inside the building explained with the images shown components elevator.Also it will mention several speeds of modern elevators used in buildings,the world’s fastest elevator,ultra-rope technology and the reasons for choosing this technique in elevator components in high-rise buildings which may be used in the space elevator that will connect earth and space.As well it shows features of the wire used in the elevators of the Burj-Khalifa,the highest skyscraper in the world.Then it mentions a number of the most recent and newest elevators in the world,then research results and references.
文摘目的探讨动态心电图参数联合血清成纤维细胞生长因子21(fibroblast growth factor 21,FGF21)、神经生长因子(nerve growth factor,NGF)对ST段抬高型心肌梗死(ST-segment elevation myocardial infarction STEMI)患者经皮冠状动脉介入治疗(percutaneous coronary intervention,PCI)术后室性心律失常的预测价值。方法回顾性选择2022年6月至2023年12月山东大学第四人民医院住院的STEMI患者187例,根据PCI术后72h内诊断结果分为室性心律失常组65例和非室性心律失常组122例。所有患者均接受PCI术,并于术后进行24 h动态心电图检查,采集心电图数据[正常窦性心搏间期的标准差(standard deviation of normal-to-normal intervals,SDNN)、相邻正常RR间期差值的均方根(root mean square of successive differences,rMSSD)、每5min时段内平均正常窦性心搏间期的标准差(standard deviation of the average normal-to-normal intervals per 5-minute period,SDANN-index)、QT间期变异性(QT interval variability,QTV)],检测血清FGF21、NGF水平,通过logistic回归分析室性心律失常危险因素,通过ROC曲线评估上述指标的预测价值。结果室性心律失常组SDNN、rMSSD、SDANN-index、QTV水平明显低于非室性心律失常组,血清FGF21、NGF水平明显高于非室性心律失常组,差异有统计学意义(P<0.01)。多因素logistic回归分析显示,PCI术后SDNN、rMSSD、SDANN-index、QTV、FGF21、NGF均为STEMI患者发生室性心律失常的危险因素(P<0.01)。ROC曲线分析显示,STEMI患者动态心电图参数SDNN、rMSSD、SDANN-index、QTV联合血清FGF21、NGF预测PCI术后室性心律失常发生的曲线下面积明显高于各项指标单独检测(0.852 vs 0.736、0.752、0.718、0.763、0.692、0.740(P<0.05)。结论STEMI患者PCI术后动态心电图参数联合血清FGF21、NGF对室性心律失常发生具有较高的预测价值,有助于早期识别高危患者。
