An Adaptive Smart Sensor Network for Overhead Lines Thermal Rating Prediction

2008 ◽  
Vol 9 (4) ◽  
Author(s):  
Alfredo Vaccaro ◽  
Domenico Villacci
Keyword(s):  
Sensor Network ◽  
Thermal State ◽  
Hot Spot ◽  
Experimental Studies ◽  
Load Level ◽  
Assessment Tools ◽  
Smart Sensor ◽  
Overhead Lines ◽  
Reliable Assessment ◽  
On Line

The need for dynamic loading of overhead lines requires reliable assessment tools that should be able to predict both the evolution of the hot-spot temperature and the associated maximum allowed duration, at any load level and on the basis of the actual conductor thermal state and environmental conditions. In order to address this problem, the paper proposes the employment of a smart sensor network distributed along the line route. Each network's node, starting from on-line measurements, assesses, by an indirect method of parameter identification, the value of the main variables which regulate the heat exchange between the conductor and its surrounding. Then, starting from these data, each node calculates the load capability curve by solving iteratively a built in dynamic thermal model and transmits the results to a central server by a cooperative based communication paradigm. To assess the performances of the proposed solution, experimental studies obtained on a laboratory overhead line are presented and discussed.

scholarly journals How hospitalized patients evaluate and report their pain together with nurses: A scoping review

2021 ◽  
pp. 205715852110134
Author(s):  
Bente Dale Malones ◽  
Sindre Sylte Kallmyr ◽  
Vera Hage ◽  
Trude Fløystad Eines
Keyword(s):  
Scoping Review ◽  
Pain Assessment ◽  
Health Professionals ◽  
Clinical Care ◽  
Hospitalized Patients ◽  
Assessment Tools ◽  
Post Surgery ◽  
Reliable Assessment ◽  
Scoping Reviews ◽  
The Relationship

Pain assessment tools are often used by patients to report their pain and by health professionals to assess patients’ reported pain. Although valid and reliable assessment of pain is essential for high-quality clinical care, there are still many patients who experience inappropriate pain management. The aim of this scoping review is to examine an overview of how hospitalized patients evaluate and report their pain in collaboration with nurses. Systematic searches were conducted, and ten research articles were included using the PRISMA guidelines for scoping reviews. Content analysis revealed four main themes: 1) the relationship between the patient and nurse is an important factor of how hospitalized patients evaluate and report their post-surgery pain, 2) the patient’s feelings of inconsistency in how pain assessments are administered by nurses, 3) the challenge of hospitalized patients reporting post-surgery pain numerically, and 4) previous experiences and attitudes affect how hospitalized patients report their pain. Pain assessment tools are suitable for nurses to observe and assess pain in patients. Nevertheless, just using pain assessment tools is not sufficient for nurses to obtain a comprehensive clinical picture of each individual patient with pain.

scholarly journals Structural Pounding Detection by Using Wavelet Scalogram

2012 ◽  
Vol 2012 ◽  
pp. 1-10 ◽  
Author(s):  
Shutao Xing ◽  
Marvin W. Halling ◽  
Qingli Meng
Keyword(s):  
Experimental Studies ◽  
Shake Table Tests ◽  
Rigid Barrier ◽  
Single Degree Of Freedom ◽  
Structural Pounding ◽  
Numerical Studies ◽  
Bridge Model ◽  
On Line ◽  
Potential Damage ◽  
Bridge Responses

Structural pounding can cause considerable damage and even lead to collapse of structures. Most research focuses on modeling, parameter investigation, and mitigation approaches. With the development of structural health monitoring, the on-line detection of pounding becomes possible. The detection of pounding can provide useful information of potential damage of structures. This paper proposed using wavelet scalograms of dynamic response to detect pounding and examined the feasibility of this method. Numerical investigations were performed on a pounding system that consisted of a damped single-degree-of-freedom (SDOF) structure and a rigid barrier. Hertz contact model was used to simulate pounding behavior. The responses and pounding forces of the system under harmonic and earthquake excitations were numerically solved. The wavelet scalograms of acceleration responses were used to identify poundings. It was found that the scalograms can indicate the occurrence of pounding and occurrence time very well. The severity of the poundings was also approximately estimated. Experimental studies were carried out, in which shake table tests were conducted on a bridge model that underwent pounding between its different components during ground motion excitation. The wavelet scalograms of the bridge responses indicated pounding occurrence quite well. Hence the conclusions from the numerical studies were verified experimentally.

scholarly journals Heat transfer in the mold during vertical continuous casting of steel

2018 ◽  
pp. 26-30
Author(s):  
E. I. Marukovich ◽  
E. B. Demchenko
Keyword(s):  
Heat Transfer ◽  
Temperature Regime ◽  
Thermal State ◽  
Effective Means ◽  
Experimental Studies ◽  
Casting Process ◽  
Continuous Casting Of Steel ◽  
Technological Parameters ◽  
Casting Method ◽  
Calculation Technique

The analysis of the performed researches has shown that the offered calculation technique is an effective means of management of formation process in casting. The found dependences and experimental data allow to calculate the specific value of the exactм heat flux in a given range of technological parameters obtained during a series of successful experiments for a particular casting method.Having the results of studies of the temperature regime of the mold during casting of a certain size and profile, it is possible to calculate the thermal state of the mold for the same casting process, but for the production of castings of any other size and profile.Having a certain amount of information on the temperature regime of the mold at different casting methods, you can use the solutions obtained to become the owner of a database containing the necessary information for solving the problems of solidification of the casting. In the subsequent design of equipment and equipment there is no need for additional experimental studies and analysis of the results.

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