bluuebunny/crossref_metadata_2025_split huggingface dataset:
Structure driven magnetic correlations and magnetodielectric coupling in 6H-perovskite Ba3DyRu2O9
Authors: Chhillar S , Mukherjee K , Yadav C S 
Published: May 2021

Abstract
The 6H-perovskites Ba3(R/M)Ru2O9 (R = rare Earth, M = transition metal) exhibit complex magnetism and have been extensively studied recently for their magnetodielectric (MD) properties. Here, we present a detailed study of structural, magnetic, thermodynamic and MD properties of a 6H-perovskite Ba3DyRu2O9. This compound is found to undergo long range antiferromagnetic ordering below ∼5.8 K (T
N), along with the presence of metamagnetic transition at low temperatures. The heat capacity shows two additional anomalies at ∼28 K (T
1) and ∼33 K (T
2), besides the anomaly at T
N. Signature of these anomalies is also visible in the derivative of magnetization curve. The dielectric response also shows weak anomalies around T
1 and T
2 at zero field whereas anomaly at T
2 gets suppressed at 80 kOe. The observed MD coupling of ∼2%–4% at 80 kOe field below ∼30 K temperature range, is among the highest values observed for the compounds of this family. Low temperature crystal structures of the compound show sharp distortion of Ru2O9 octahedra near T
2. Our study points toward the emergence of structurally driven spin correlations of Ru moments resulting in the observed MD coupling in this compound.
Fabrication and optical behavior of AuCuSi amorphous alloy film
Authors: Jia Hao , Xu Tianding , Yao Wang , Cao Qingping , Wang Xiaodong , Jiang Jian-Zhong , Zhang Dongxian 
Published: May 2021

Abstract
Amorphous alloys (AAs) are promising materials due to their unique properties and have been applied in various biomaterial coatings and micro-electro-mechanical systems. However, they have seldom been applied in the optical nano-device. Here, we systematically investigate morphology, microstructure, mechanical and optical properties of an Au–Cu–Si AA and successfully design and fabricate a broadband optical absorber using the Au–Cu–Si AA. Such device achieves an average absorption up to about 95% from 500 to 1500 nm with a thickness less than 300 nm. This is of significance for exploration the feasibility of AAs application in the field of optical nano-devices.
Performance improvements in all-solution processed inverted QLEDs realized by inserting an electron blocking layer
Authors: Zheng Weiye , Song Dandan , Zhao Suling , Qiao Bo , Xu Zheng , Chen Junfei , Liu Guoxu , Shen Chongyu 
Published: May 2021

Abstract
Highly efficient, all-solution processed inverted quantum dot light-emitting diodes (QLEDs) are demonstrated by employing 1,3,5-tri(m-pyrid-3-yl-phenyl)benzene (TmPyPB) layer as electron blocking layer. Electron injection from ZnO electron transport layer to quantum dots (QDs) emission layer (EML) can be adjusted by thickness of TmPyPB layer, enabling the balanced charge carriers in QDs EML. With optimal thickness of this TmPyPB adjuster, 59.7% increment in the device current efficiency (from 8.2 to 13.1 cd A−1) and 46.2% improvement in the maximum luminance (from 31916 to 46674 cd m−2) are achieved, compared with those of the control QLED which has double hole transport layer structure. On the other hand, we find luminescence quenching process, which often happens at the interface of ZnO nanoparticles and QDs, is not obvious in our QLEDs, in which the ZnO layer is fabricated in precursor method, and this conclusion is verified through Time Resolution Photoluminescence test. In a word, this strategy provides a direction for optimizing charge carrier balance in all-solution processed inverted QLED.
Diffraction in time of an entangled non-relativistic quantum particle
Authors: Umul Yusuf Ziya 
Published: May 2021

Abstract
The diffraction process of an entangled non-relativistic quantum particle in time domain is investigated. The scenario consists of two entangled spin-0 particles and a quantum shutter, which is opened at an initial time. The particles are traveling in two opposite sides and expressed with a single wave function. The integral solution of the Schrödinger equation is considered for two particles case. The initial condition is expressed in terms of an entangled wave function. The time-diffracted matter wave is obtained in terms of the Fresnel integral. The effect of the phenomenon of diffraction in time is examined numerically for the entangled system of two particles.
Proposition of a new approach for calculating the efficiency of domestic gas cooking appliances
Authors: Moreira Rosana Medeiros , Oliveira Elcio Cruz de 
Published: May 2021

Abstract
The process of measuring the performance of gas cooking appliances is based on the simple calculation of the arithmetic mean between the results obtained from different burners, without any metrological rigour related to the behavior of the data. This study proposes a new methodology and compares it against the traditional one. The proposed approach evaluates whether data are far apart on the normality, treats outliers and calculates the efficiency from the position measure inversely weighted by the dispersion measure of each burner. For the datasets studied, there may be divergences between the results found for the efficiency calculation when treated by the traditional approach and the proposed approach. However, this study recommends a detailed analysis of the algorithms used, in order to better understand the reason for the divergences found; as well as the implementation of measurement uncertainty calculation, in order to evaluate the partial overlap between specification ranges.
Quality infrastructure and innovation in the Brazilian information technology services: evidence from the National Innovation Survey
Authors: Reis Marcello Carvalho dos , Almeida Maria Fatima Ludovico de 
Published: May 2021

Abstract
The objective of this work is to contribute to the advancement of knowledge about the innovation capacity of information technology service companies in Brazil, with emphasis on the role of the quality infrastructure functions in strengthening this capacity. We have drawn the data from the National Innovation Survey 2014 (Pintec 2014) to answer how the companies in this sector perceive the importance of quality infrastructure functions in their cycles of innovation, to highlight the benefits derived from the existence of such infrastructure in Brazil.
Self-assessment model for testing and calibration laboratories based on ISO/IEC 17025:2017 requirements
Authors: Belezia Luciano Carlos , Almeida Maria Fatima Ludovico de 
Published: May 2021

Abstract
This paper aims to propose a self-assessment model for evaluating the competence, impartiality, and consistent operation of testing and calibration laboratories, based on ISO/IEC 17025:2017 requirements. During the research, an attempt was made to demonstrate the applicability of the proposed model through the development of a case study in one of the Brazilian Navy’s Testing and Calibration Laboratories. The main outcome of this research is an innovative self-assessment model for testing and calibration laboratories, with a view to supporting decisions for achieving accreditation. Notably, the results of the empirical study demonstrate that it is feasible to determine the readiness level of the Navy’s Laboratory in compliance with the requirements of the mentioned standard. Also, they allowed identifying opportunities for improvement of the current management system of the Laboratory.
Hardness Reference Blocks as Certified Reference Materials to be supplied by Inmetro to the Market
Authors: Filho Jorge Trota , Oliveira Sérgio Pinheiro de , Fratari Rômulo Queiroz 
Published: May 2021

Abstract
Reference materials for the Rockwell, Brinell and Vickers hardness scales are fundamental for the Brazilian industrial sector. Mechanical property Hardness is the most common mechanical test used for quality control of raw materials in finished products as well as in research and development of new products and materials. A description of the main findings of two studies and the revalidation of the last on the demand of hardness reference blocks in Brazil is presented. This paper shows national demand of hardness reference blocks could be supplied on a large scale by Inmetro´s Force Laboratory.
Developing virtual instruments in Excel for metrology teaching and training
Authors: Banegas J M , Cámara E , Orué M 
Published: May 2021

Abstract
The use of technology to improve education – either in the classroom or online – is highly positive, making possible to expand the learning experience beyond the classroom or laboratory. In this paper, different technologies are explored focusing in their applicability for metrology training. Then a new approach is proposed, developing different virtual instruments in Excel. This tool allows easy use both for the teacher and the student, is portable between different platforms with a simple file sharing, and is highly applicable to metrology.
The redefined SI and the electromagnetic quantities in detail – part I: current and voltage
Authors: Landim R P , Carvalho H R , de Oliveira V C 
Published: May 2021

Abstract
This paper describes the electromagnetic units after the SI redefinition and the details regarding how they are realized. It is divided into two parts. In this first part, we review the state-of-the art performance, the physical principles, diagrams, electrical circuits, equations and uncertainties of the ampere and volt realizations.
Quantification of Ca, K, Mg, Zn and Fe elements in grape leaves from different regions of Iraq by atomic absorption spectroscopy
Authors: Albakaa A R M , Ameen D S M , Abed N K , Jabbar Z A , Musaa L A 
Published: May 2021

Abstract
Grapes grow in various regions of Iraq, regions have been selected Baqubah, Al Khalesah, Nasiriyah and Sulaymaniyah, to determine the Ca, K, Mg, Zn, and Fe concentrations in their leaves for its nutritional importance using atomic absorption spectroscopy (A.A.S.). Two procedures were used for sample preparation (one of their new) and their accuracy data was evaluated, no significant differences at 97% level of confidence were found by comparison the dataset results for two methods. It has been found that Ca, K, Mg, Zn and Fe metal ion concentration are in the range of (806.9 – 2815.2), (7092.2 – 11058.7), (3708.7 – 5434.8), (17.2 – 30.8) and (114.8 – 3083) μg.g-1, respectively and follow the order K>>Mg>Ca>>Fe>Zn. However, the metal contents in vine leaves from Al Khalesah and Baqubah were relatively high in comparing to those of Sulaymaniyah and Nasiriyah. Fe metal content significantly differs from region to region and the highest concentration was found in grape leaves from Baqubah region (2890.9 – 3083.0 μg.g–1), Nasiriyah (2314.8 - 2331.3 μg.g–1), Al Khalesah (205.7 – 237.2 μg.g–1), while the lowest from Sulaymaniyah (110.9 – 114.8 μg.g-1). Thus, through the variation in the concentration of trophic metals in grape leaves from one region to another and their lack of similarity, irregularity, and incongruence, it can be concluded that the different concentration of elements depends on the quality of the soil, the irrigation water, and the climate and atmosphere (The nature of environment).
Research and application of full electronic control testing technology for chemical flooding in Daqing Oilfield
Authors: Guangle Gao , Haicheng Li , Chongjiang Liu , Lijuan Wang , Meng Cai , Jundong Tang , xingliang Song , Yu Han 
Published: May 2021

Abstract
chemical flooding and separate injection has entered the stage of large-scale popularization and application. With the deepening of development, the number of separate injection wells is increasing year by year, and the test workload is increasing continuously. Because the test and adjustment period of chemical flooding wells is shorter than that of water flooding, the test workload and test pressure are further increased The electric sealing and fishing technology is adopted to realize the electric control direct reading in the whole process of sealing, bailing and adjustment of chemical flooding wells, and the efficiency of measurement and adjustment is further improved. This paper introduces the process principle, technical characteristics and application effect of electric sealing and fishing technology of chemical drive. Fund supported projects: National Science and technology major project 2016zx05054 “Daqing placanticline extra high water cut oilfield EOR demonstration project”.
Application of Particle Swarm Fuzzy-Smith PID in Temperature Control of Bag Filter
Authors: Wei Yuanfang , Cheng Fa , Tang Na , He Xin 
Published: May 2021

Abstract
The temperature control of the bag filter is a non-linear control system with large time lag and too complicated environmental factors. Therefore, building an accurate model is very difficult and thus unable to perform precise control. Currently, fuzzy PID methods are mostly used. However, fuzzy PID relies too much on expert experience. After the parameter value is set, it cannot be adjusted with the change of the input error, and the dynamic performance is poor. In this article, optimizing the scale factors Kp, Ki, Kd and quantization factors Ke, Kec in fuzzy PID control by particle swarm optimization. Besides, smith control aimed to eliminate the effect of time lag and then using MATLAB to verify the effectiveness of the algorithm. Experiments show that particle swarm optimization fuzzy PID has faster response speed, smaller overshoot, and shorter time to reach a steady state.
Research on Automatic Bit Feeding Control System with Constant Weight on Bit Based on Fuzzy Predictive Control
Authors: Liu Guangxing , Zhang Yige , Cao Xilin 
Published: May 2021

Abstract
According to the automatic bit feeding system of oil drilling rig has basic characteristics such as multi-variable, time-varying and nonlinear, an automatic bit feeding control system with constant weight on bit (WOB) based on fuzzy predictive control is proposed. The fuzzy predictive controller of WOB is designed, and the future output of the system is predicted by predictive control, and the output value of the system is close to the given value of WOB as much as possible by fuzzy control. The simulation results show that the response speed of the system is improved, which meets the requirements of small error and high precision, and has a certain guiding significance for the actual design and application.
Interpretation and evaluation of the electrical thickness of 0.2m high-resolution logging series
Authors: Xiuqin Li 
Published: May 2021

Abstract
This article compares and evaluates the electrical thickness interpretation results of the 0.2 m high-resolution logging series and the currently applied DLSII logging series. The author finds that there is no difference in their external thickness electrical measurement interpretations. However, the interpretation thickness and number of layers of the high-resolution logging series with an effective thickness of 0.2 m have increased slightly, and the oil layer group Gaotaizi, which is mainly thin and poor layers, has increased. This conclusion laid a foundation for the promotion and application of the 0.2m high-resolution logging series.
Review of automatic fire water monitor system
Authors: Duan Linfeng , Hou Xinguo 
Published: May 2021

Abstract
The fire protection technology of large space building based on fire water monitor is a research hotspot in the field of fire protection technology. Aiming at the related contents and existing problems of the current fire water monitor research, this paper introduces the working principle and characteristics of the automatic fire water monitor system, and summarizes the research on the fire detection and positioning of the automatic fire water monitor system, the jet trajectory of the fire water monitor and the fire water monitor control system. This paper summarizes the research methods and shortcomings of fire detection positioning, fire water monitor jet trajectory and fire water monitor control system, and puts forward suggestions and prospects.
Construction of a digital intelligent evaluation platform for energy consumption of large oilfield water injection systems
Authors: Ruan Yan , Zhang Xuliang , Ning Junfeng 
Published: May 2021

Abstract
With the development of oilfield water injection systems becoming more and more complex, relying on artificial experience to judge the efficiency of energy consumption and the status of the system more difficult. Based on hydraulic theory and matrix theory, establish the characteristic equations of the node unit, pipeline unit and auxiliary unit of the water injection system, and use the flow balance to form the overall matrix equation of the water injection system. Established a theoretical model of water injection system simulation, based on this, build a digital intelligent evaluation platform for water injection system energy consumption. In this way, it simulates the production operation status of the water injection system under theoretical conditions and compares it with the actual production operation data, so as to accurately analyze and evaluate the current status of the water injection system’s pipe network energy consumption and the operating efficiency of the branch pipe network energy consumption of each water injection station. The intelligent analysis and evaluation of energy consumption of the water injection pipe network system has been realized, and the optimization and transformation goals have been defined. It has played a significant role in promoting the realization of digital and intelligent oilfield water injection systems.
An Novel Method for Object Tracking in Sensor Network Combination with Trilateration and UT Transform
Authors: Kang Zhang , Xuan-zhi Zhao , Wen Zhang 
Published: May 2021

Abstract
Positioning and tracking are the key technologies of wireless sensor networks. Trilateration is an important method for the localization of wireless sensor network nodes. This method uses three anchor nodes to determine the location of the target. In this paper, UT transform and trilateral measurement method are combined to obtain the statistics of target position, and then use it as the virtual observation of Kalman filter to realize dynamic target tracking. The simulation results verify the performance of the method proposed in this paper.
Passive Ranging Based on Accurate Prediction of Target Radiation Temperature
Authors: Xiaoning Fu , Shiwen Xu 
Published: May 2021

Abstract
In this paper, a passive ranging method based on accurate prediction of target radiation temperature is proposed. Firstly, different wave bands are intercepted and the corresponding light radiation energy on two different wave bands are obtained; secondly, the temperature of target is estimated according to the linear relationship of the corresponding light radiation energy in two different wave bands; and the target can be equivalent to a blackbody of different temperature categories; thus, the range information of the target can be obtained, and the passive ranging error of air target can be realized. In this way, the target can be divided into different categories according to its own temperature, and the subspace of passive ranging can be effectively divided, which can provide a rule to avoid blindness for the subsequent target distance estimation. In the end of this paper, the accuracy of the method is verified by experiments, and the error of ranging accuracy is analyzed, which proves the feasibility of this method, and lays a foundation for future engineering applications.
Flat Film Structure Wireless Passive Pressure Sensor based on SiCN materials
Authors: Wang Caishun , Zhang Jiajia , Zhang Xin , Li Huan 
Published: May 2021

Abstract
In order to solve the measurement of air pressure in harsh environment, a new kind of wireless passive pressure sensor based on the amorphous SiCN material with high heat resistance was proposed. Ansoft HFSS software was used to study the relationship between the size of the rectangular resonator with the resonant frequency and quality factors. By optimizing the position and size of the sloped antenna, a wireless passive pressure sensor with high performance was designed. The sensitivity is 0.25mpa/GHZ and the bandwidth is 0.85GHZ of the pressure sensor at the working frequency of 6.8GHZ. This indicates its potential application in the harsh environment with high temperature.
Research and evaluation of the measurement uncertainty with the pipeline robot
Authors: Hu Chang’an , Luo Shutong , Li Wanze , Lv Fei , Cai Dongyan , Kong Linghui 
Published: May 2021

Abstract
The pipeline robot used to detect and maintain the pipeline is a novel technical means, which changes the single traditional mode of excavation sampling inspection of pipeline. This detection technology not only improved the accuracy of pipeline detection but also is easy to analyze the causes of pipeline defects for pipeline engineering management maintenance staff. It is possible to carry out a review of defect and develop pipeline maintenance solutions. Using this method can eliminate the security hidden danger before repairing or replacing section. Thus, the use of a pipeline can save a lot of maintenance costs and reduce pipeline maintenance cost, which can also ensure the safety of people’s life and property. In addition, this method can also reduce the toxic gas or liquid leakage to protect environmental pollution. Therefore, the research of a pipeline detection robot has an important scientific significance and social value. In this paper, our group has a base of the long-term research with the geometric measurement technology, so the measurement uncertainty of the common pipeline robot is studied. The measurement uncertainty of error about positioning is defined as U=0.59mm+9×10−2L, k=2 (L unit is m), and the uncertainty evaluation of angle errors measured, including the forward and backward pitching angle, left-right tilt angle, is U=0.10°+4.6×10−3
θ(θ unit is °).
Development of Intelligent Planning & Integrated Office Management System for Drilling Operations in South Azadagan
Authors: Liu Zhikun , Li Aixi , Li Jihui , Bai Mingna 
Published: May 2021

Abstract
Due to the distance limitation between the drilling department in Iran and the head office in China, it is necessary to improve the management level of the south Azadagan drilling department in the south of Iran. According to the drilling operation characteristics of Iran south Azadagan department, we design and develop an Intelligent Planning & Integrated Office Management System (IPIOMS) including design management, work report, planning and cost control, operation management, statistical query and logistics support.
Acoustic emission monitoring and phased array ultrasonic testing for the steel bifurcated pipe of 800MPa grade strength in hydraulic test
Authors: Wu Weiping , Fan Qinhong 
Published: May 2021

Abstract
The paper analyzes and studies the acoustic emission monitoring and phased array ultrasonic testing of steel bifurcated pipe of 800MPa grade strength in hydraulic test. The comprehensive grade of AE location source is assessed, and the structure health is evaluated, the AE characteristic parameters of an important hazardous area corresponding to the load elevated stage and load holding stages are analyzed and compared, and Kaiser effect is verified. PAUT is used to examine the area of great activity located by AE, and the position of welding defects found by PAUT is basically consistent with the AE location map, then the location error of AE is illustrated in the region of irregular shape. The AE and PAUT are of great advantage in hydraulic test of the steel bifurcated pipe.