bluuebunny/crossref_metadata_2025_split huggingface dataset:
Research on Characteristics of Coastal Wind Power under Typhoon Environment in Fujian Province
Authors: Chen Weidong , Fang Rishen , Li Dengxuan , Cheng Xu , Huang Ting 
Published: August 2020

Abstract
The typhoons that landed or affected Fujian province from 2016 to 2018 are statistically analyzed. The results show that in recent four years, there are two typhoons affecting Fujian province every year on average, and seven typhoons landed and five are super typhoon. Typhoon landing in Taiwan island has a great impact on the coastal wind speed of Fujian province. The wind speed firstly increased and then decreased after entering the Taiwan Strait, and increased again before landing in Fujian province. When the typhoon directly landed, the wind speed continued to increase before landing and decreased after landing. The wind farm responded to the possible impact of the typhoon during the high wind speed, and selectively shut down. When the wind speed exceeded the rated wind speed, the wind turbine automatically cut out. When the wind turbine was not shut down or cut out, the consistency between wind power output and wind speed was relatively high. Before the typhoon landed, the output gradually increased to full power, with the intensity of the typhoon weakening, the output of wind power decreased.
Experimental Determination and Modeling of Drying Process of Woody Biomass
Authors: He Xiao , Wang Lianjun 
Published: August 2020

Abstract
Birch is a kind of readily available woody biomass resource, which can be used to crush and manufacture fuel particles and animal bedding. One of the important aspects during the production system is the drying of biomass prior to storage or processing. Moisture migration in wood is a particularly important factor in determining the drying process. The objectives of this study are to investigate the drying characteristics of Birch and develop a model to simulate moisture diffusion in Birch during the drying process. Experiments were conducted in a controlled environment chamber. Different temperatures and relative humidity were set to simulate the different drying conditions. The mechanism of moisture movement in Birch samples during the drying process was represented by a diffusion model according to Fick’s second law. A computer program in Matlab software was developed to simulate the infinite element model. Moisture diffusivity of Birch was determined by minimising the sum of squares of the residuals between experimental results and numerically predicted data. Results showed that the moisture diffusion coefficients of Birch ranged from 1.2×10−7m2/hr to 9.6×10−7m2/hr with temperature varying from 20°C to 60°C. And the trend of diffusion coefficient versus temperature was in accordance with the Arrhenius equation.
Waste reduction by implementation of CNC machining center and Lean Manufacturing
Authors: Gherghea I C , Negrau D C , Bungau C , Faur M 
Published: August 2020

Abstract
In the context of increasing competitiveness, the companies from manufacturing industry are constrained to provide quality products at a lower price and a shorter delivery time. This brings new challenges during the manufacturing process. One of the main challenges is to reduce or eliminate waste during the production stage. The actual paper presents methods and solutions through which the waste from the manufacturing process is identified and eliminated. As a consequence, increased productive efficiency and higher profit have been gained. The objective of this study is to implement Lean manufacturing tools, in order to improve the production process carried out within a manufacturing company, with a small manufacturing batch. Based on real data from the manufacturing process, the current value stream mapping (VSM) was built, identifying both operational and non-operational times. After waste identification, an optimal solution was chosen for the manufactured parts required by the customer. Implementing the best solution resulted in a productive efficiency increase by 90.93%, which significantly reduces the manufacturing time.
Investigation of NOx emissions for mitigating public health risk with Mercedes E Coupe
Authors: Băldean D L , Andrei L , Borzan A I 
Published: August 2020

Abstract
Investigation of NOx emissions is a worldwide concern in order to mitigate or to reduce the health risks that the pollutant poses for the public. It is known that the NOx are a combination of highly reactive odourless gases containing nitrogen and oxygen in different proportions. The main objective of the present paper is to show the applied investigation and its following results regarding NOx values and trendlines for the warm-up phase of a Mercedes E 350 CDI Cabrio-Coupe A/C/W207. The secondary objective of the investigation consists in dividing and comparing the results obtained before and after the threshold limit of 40˚C in coolant temperature. The warm-up sequence is not the highest temperature stress regarding pollution and NOx formation. It is although very important due to at least two reasons. In the first place, many of the usual road traffic trips are not exceeding the warm-up duration, meaning that the travel is below 40 minutes long. Secondly, the operation below 60˚C is the most stressful both physically and chemically for the engine (its systems) and the environment being defined by high wear and pollution levels. Temperature is a key factor.
Investigation of Failures and Vulnerabilities in Road Traffic Air Quality Management System during 2020 Pandemics
Authors: Bec P , Frunză M , Băldean D L 
Published: August 2020

Abstract
Air deterioration and high toxicity affects life quality and longevity. Most important is pollution and toxicity impact upon health and disease management. Air born sicknesses and health problems are a permanent challenge for air dependent life-forms. Lately have been recorded manifestations and a complex phenomenology of air partially transferred pathogenic agents. The air quality is subject to investigation in order to provide a better management of the pollution control system. Pollution is a major contributor to air quality deterioration and to health problem multiplication. Present day pandemic is thought to be partially transmitted through air and by direct contact. Low air quality may be a serious contributing factor to sickness promotion. Air pollution due to road traffic and livestock is one such factor. The main objective of the paper is to investigate some important failures and vulnerabilities recorded in the road traffic air quality monitoring system during 2020 pandemics in our country and in Cluj. Thus, the evolution of chemical composition has been put under the spot of scientific investigation. Failures and weak points have been acknowledged and considered for improvement. At least twelve significant system failures and multiple vulnerabilities have been recorded due to sensor faults and unit malfunction. Social lockdown reduced all pollutants, but some units failed to indicate it properly.
Prediction of material removal rate in turning using Response Surface Method
Authors: Stănășel I , Blaga F S , Buidoș T , Corb F 
Published: August 2020

Abstract
Obtaining quality products at low costs is the main objective of any company. As a result, the efficiency of the production processes is sought by identifying a favorable combination of all the factors that influence the respective process. With regard to metal cutting, the Material Removal Rate (MRR) is an important factor affecting machining time.The paper makes a study to highlight the influence of cutting parameters on material removal rate using Response Surface Method (RSM). Using analysis of variance (ANOVA), you may identify the significant factors of the process and determine a second-order regression model that takes into account both main effects but also and the interactions between factors. It also presents the possibility of optimization of cutting parameters for streamlining the turning process.
Cam – clamping device with variable eccentricity
Authors: Tocuţ P D , Stănăşel I , Feric C 
Published: August 2020

Abstract
Productivity and quality growth, all together with cost reductions, are the main objectives of modern manufacturing companies. Fixture devices shall facilitate that the workpiece can be changed fast, to have simple construction, to be cheap and affordable, and they have minimal positioning and installation errors. Clamping forces are applied to the workpiece with the help of fixture devices, after being correctly oriented by the application of adjusting forces. In the stage of design, many parameters are taken into account, like strokes and forces necessary, operation time, build simplicity, all which determines the cost of the device. In the field of device design, the main requirements are related to rapid fixing of the workpiece, fixing of more workpieces simultaneously and reducing the effort of labour for the operators. In this paper is presented the research and construction of a circular cam with variable eccentricity used in one this kind of fixture devices.
Dynamics of a 6R industrial robot
Authors: Ratiu M , Rus A , Balas M L 
Published: August 2020

Abstract
In the context in which, the dynamic behavior and performance of industrial robots are very important for their general performance, we present, in this article, a short dynamic analysis of an industrial robot. First, on the base of a short review of some papers on this topic, a general presentation of some main concepts regarding the dynamics of the industrial robots, and of the actual importance of the virtual prototyping in studying the dynamic behavior and performance of such complex mechanical systems are highlighted. How the modern virtual prototyping tools allow better, more rapid, and less costly dynamic designing of the complex mechanical systems, comparing to the traditional designing and prototyping, and ADAMS MBS of MSC software enables the evaluation of the dynamic behavior of the virtual prototype of a robot during its designing stage, by starting from the kinematic model previously developed, we conducted in this research the process of dynamic modeling and simulation of a 6R articulated robot developed in ADAMS and a short dynamical analysis of it.
Clutch model and controller development in MATLAB Simulink
Authors: Moldovanu D , Csato A 
Published: August 2020

Abstract
With rapid developing of automated gearboxes used in conventional, hybrid and also plug-in hybrid vehicles, clutches are inevitably controlled by transmission control unit. The effectiveness of the clutch control is based on how smoothly are engaged and disengaged in different situations like drive away from standstill, changing gears at high torque demand or changing between different modes in hybrid vehicles. In this paper a clutch model is developed in MATLAB Simulink environment taking in account physical properties of the clutch. For establishing a controller that is robust enough to take in consideration clutch wearing and is smooth enough for ride comfort, multiple control strategies are implemented. Finally the control strategies are compared in different situations.
Modeling with hierarchical colored Petri nets. Case study
Authors: Blaga F S , Pop A , Vesselenyi T , Hule V , Indre C I 
Published: August 2020

Abstract
The paper presents the results of research on the use of hierarchical models with colored Petri nets in the evaluation of automated systems for the preparation and analysis of metallographic specimens. Modeling with hierarchical colored Petri nets was used to evaluate the performance of a preparation and analysis robotic system for metallographic samples. The automated system is composed of three subsystems: the subsystem for the preparation of metallographic samples, the subsystem for the attack with reagent of metallographic samples, the subsystem for the analysis of metallographic samples. Two models were made: a model with colored Petri nets with simple colors and a model with timed colored Petri nets with complex colors. Each model was developed on two hierarchical levels. Level 1 contains the model of the entire flexible system for the preparation and analysis of metallographic samples. Level 2 consists of three sub-models: the sub-model of the system for the preparation of metallographic samples, the sub-model of the system for the reagent attack of metallographic samples, the sub-model of the system for the analysis of metallographic samples. Models with timed colored Petri nets allow the evaluation of system performance in terms of the number of samples analyzed in a time interval. The performance of the modeled system was evaluated by simulation, considering a time interval of eight hours.
Research on the behaviour of a LiFePo4 pouch cell under mechanical stress
Authors: Szabo I , Kocsis L , Mariasiu F 
Published: August 2020

Abstract
In this article, research has been done regarding the behaviour of the pouch cell under the action of mechanical abuse, in order to improve pouch battery cells design. Four types of indentations were performed on pouch cell respectively, three-point bending, lateral bending, indentation with hemispherical head and pinch indentation. Contemporary electric vehicles are a solution in terms of environmental pollution, that is why the large vehicle manufacturers also have different models of electric vehicles. Also, a major problem for electric vehicles customers is the autonomy of a vehicle. That forces major electric vehicle manufacturers to invest in in-depth research into storing electricity in energy cells. Li-ion cells seem to be a viable solution at present, and that is why the paper presented a pouch-type cell subjected to specific mechanical stresses. Also, the internal short circuit can be observed in all four tests performed, and its effects are destructive in the case of lithium-ion pouch cells.
The influence of ethanol and biodiesel blends on diesel engine performance and emissions
Authors: Benea B C 
Published: August 2020

Abstract
This paper presents the variation of energy parameters and pollutant emissions of the diesel engine for different types of diesel-biodiesel-ethanol blends. The biofuels added in fossil fuels influence the mentioned characteristics. Ethanol is a renewable fuel, which is obtained from plant biomass, sugar and starch. The tests were performed on a 4-cylinder engine, water cooled with pure diesel (D), 10% ethanol (D90E10), 10% ethanol 10% biodiesel (D80B10E10), and 15% ethanol 10% biodiesel (D75B10E15). The comparative results of the engine operation with these fuels for the evaluation of performance and pollutant emissions were presented. Nitrogen oxides (NOx) decreased moderately for fuel blends compared to pure diesel. A slight increase in hydrocarbon (HC) and carbon monoxide (CO) emissions was observed with fuel blends due to low combustion temperature inside the engine cylinder. It can be concluded that the engine power has a small variation compared to diesel operation, and the pollutant emissions are lower when the engine runs on fuel mixtures.
Validation of an algorithm for predicting the remaining useful life, for a model with linear degradation
Authors: Grebenişan G , Salem N , Bogdan S , Negrău D C 
Published: August 2020

Abstract
This paper aimed to validate a working tool, component of the Predictive Maintenance Toolbox ™, produced by Matlab (MathWorks), in the case of a procedure for monitoring the operation of mechanical systems, in order to diagnose a failure of the process and to estimate the remaining useful life (RUL). This toolbox provides toolsets, materialized in function files, for labeling data, designing condition indicators, and estimating a parameter named the remaining useful life of a machine. You can analyze and label machine data imported from local files, cloud storage, and distributed file systems. The algorithm suggested by Matlab (software owned by MathWorks) was used in detail to process part of the data set provided freely by NASA through The Prognostics Data Repository, The Prognostics Center of Excellence (PCoE) at Ames Research Center. Of the 4 data sets, only one was used for this paper. Each data set is composed of 3 working files, in text format, for training, test and algorithm validation, and solution statement, respectively. The results obtained confirm the validity of the computer-assisted training system, diagnostics, prognosis, and validation tools, on a statistical basis, in the case of consistent databases.
A brief overview of Additive Manufacturing
Authors: Negrau D C , Grebenișan G , Gherghea C 
Published: August 2020

Abstract
In this paper, a brief overview is presented, resulting from a recent literature review of some representative books or papers regarding various research on additive manufacturing. Some basic terms are presented, in the context of founding the existence of several terminologies for some specific expressions of this subject, as well as different definitions for them materials used at that process, areas of using, problems appeared during process of manufacturing, heat treatments used, advantages and disadvantages. This research is carried out to identify a solution for controlling the parameters during the additive processing (AM) process, parameters with which to improve the quality of the parts obtained by AM
Theoretical and experimental research on the use of the blinking reflex for command and control of human body movement
Authors: Drăgusin D , Baritz M 
Published: August 2020

Abstract
The blink reflex is a behavioural motor response that is normally found in the process of seeing at newborns and human adults. As with the corneal reflex, the supraorbital branch electrical stimulation of the trigeminal nerve causes a facial nerve bilateral response, namely eyes blinking. Therefore, this sensitive process can also be a neurological control element for performing movements, related to the natural blinking process amplitude, speed and frequency. In the first part of the paper, a series of blinking process physiological aspects are analyzed, in order to identify the movements command and control components. In the second part of the paper, it is analyzed the devices constructive variants for evaluating the blinking process and the connecting possibility with separate sensory elements that can collect information from the visual system neuro-motor level. In the third part of the paper, there are mentioned some aspects related to the experimental installation design and the command and control mode for setting in motion a system using the coordinated ocular and neurosensory blinking mechanism. The final part presents the conclusions of this approach to the development of a system with the use of oculomotor and neurosensory stimuli.
Material handling based on object recognition with the help of FANUC delta-parallel industrial robot
Authors: Korsoveczki Gy , Husi G 
Published: August 2020

Abstract
The task was made that recognizes objects with the help of delta-parallel constructed pick & place FANUC robot, that can be found at the Mechatronics Department, Engineering Faculty, University of Debrecen. The detection of the different objects was realised by a SONY XC-56 typed industrial monochromatic camera and using the own image processing software component of the robot. To accomplish the material handling a linear drive, an electropneumatic gripper and the digital output system of the robot were used. During the project, the implementation of a material handling operation was the aim that is based on the machine vision of the robot. As a result, the robot used its vision and object recognizing ability based on iRVision environment, completed object recognition and material handling procedure with the help of a linear drive controlled by robot program code.
Researches regarding the inner turning of the Polytetrafluoroethylene at small and medium feeds
Authors: Pascu I , Popescu I , Didu A 
Published: August 2020

Abstract
Experiments were made of the inner cylindrical turning of the Teflon with small and medium feeds, collecting the resulting chips. The shapes and dimensions of these chips are analyzed, explaining their correlation with the advance and with the deformation of the chips sections. The shapes of the chips resulting from considerations of the cutting process of this material are explained. From the analysis of the shapes of the chips, conclusions can be drawn regarding the deformation of the part material in the cutting area, meaning an appreciation of the machinability of the material. The quality of the chip surface indicates the marks left on the chip by the fine chip elements, some of them sticking to the resulting chip. The visualization of the aspect of the machined surface on the piece shows the lack of deposits on the edge, with small exceptions, the uniformity of the channels generated by the tip of the turning tool on the workpiece. All these considerations, as well as the final table regarding the deformation of the chip during processing, show how the Teflon behaves when turning inside with small feeds.
3D Modelling and FEM Analysis on Die Clash Mint Error
Authors: Gavrila C C , Lates M T 
Published: August 2020

Abstract
During the last century, a large number of modern coins which wearing different error types were minted and released. In literature, there are known various error types, each is provided by some causes, as the coin metal, the coin dimension and also the manufacturing step where it could appear. The die clash error appears when the striking tools – the obverse and reverse negative dies - heat each other without the coin blank inside them. The paper presents the influence of some initial condition on the amplitude of this error, as the die size, the model flat field size or the model shape. In the first part of the paper, some introductive aspects of the die clash error are presented with some particular examples. Then, the obverse and reverse die 3D model is presented, followed by the finite element analysis, which is realized and achieved for considered initial conditions. In the final paper part, the analysis results and conclusions are presented.
A modular approach to the kinematics of the vehicle axle suspension linkages
Authors: Alexandru C 
Published: August 2020

Abstract
The work deals with a modular approach on the kinematics of the suspension linkages used for the rear axle of motor vehicles. The multi-body systems theory/method was used to formulate the motion equations for the kinematic analysis, by individually considering the basic binary connections (which are defined by considering the types geometric constraints between the guiding arms/links and the adjacent bodies - car body and axle, respectively) that constitutes the suspension mechanism. Subsequently, by combining these binary connections in various combinations, the kinematic analysis of any type of axle suspension linkage (at least those commonly used) can be easily performed.