bluuebunny/crossref_metadata_2025_split huggingface dataset:
Survey of mitochondrial sequences integrated into the bovine nuclear genome
Authors: Grau Erwin Tramontin , Charles Mathieu , Féménia Maureen , Rebours Emmanuelle , Vaiman Anne , Rocha Dominique 
Published: February 2020

AbstractNuclear copies of the mitochondrial DNA (NUMTs) have already been described in several species. In this context, we identified and analysed 166 bovine NUMT regions with a total length of 430 kbp, representing about 0.02% of the cattle nuclear genome. Copies of all mitochondrial regions were detected in the nuclear genome, with distinct degrees of sequence similarity to the mitogenome. Some NUMT regions include large mitogenome segments and show high similarity to the organelle genome sequence. NUMT regions are frequently modified by insertion of repetitive sequences and by sequence rearrangements. We confirmed the existence of 29 NUMT regions by PCR amplification using DNA from the cow (Dominette) which was used to generate the bovine genome reference sequence, ruling out the possibility that these NUMTs could be artifacts of the genome assembly. As there are NUMT regions with high similarity to the mitogenome, special care is needed when designing primers for mitochondrial DNA amplification. Our results can therefore be used to avoid co-amplification of bovine nuclear sequences similar to mitochondrial DNA.
Intelligent Transportation System: Traffic Load Monitoring and Remote Sensing Structural Health Monitoring of Critical Bridges in Metro Manila using Multi Modal Analysis
Authors: Montes K M , Embalzado K A , Sayno A J , Tani L C , Marquez I , Uy F A A 
Published: February 2020

Abstract
Bridge load limit monitoring is a major problem in the Philippines. Since this was not implemented strictly, the structural integrity of the bridges was affected hence it resulted to frequent maintenance, retrofitting of strucutral members and collapse. The integrity of the bridge continously decreases through time once the maximum load limit was experienced by the structure. Therefore, this study aims to emphasize the importance of traffic load monitoring in conducting structural health assessment of bridges aside from earthquake and mass loads. The 7.7% increase in the flexure stress of the bridge deck indicates that truck loading has a significant effect on the bridge. In addition for this, variation on the truck volume for peak hours and non peak hours will correlate to the reading of the smart sensor attached on the bridge for structural health monitoring.
The Influence of Powdered Crumb Rubber on the Mechanical Properties and Thermal Performance of Lightweight Foamed Concrete
Authors: Heng Lim Zhi , Wei Lee Foo , Hung Mo Kim , Zee Kwong Kok , Kun Yew Ming 
Published: February 2020

Abstract
The introduction of powdered crumb rubber into the lightweight foamed concrete influenced various mechanical and physical behaviour of the concrete. The objective of this study is to investigate the influence of 15 %, 30 % and 45 % crumb rubber, in replacement of sand on the mechanical properties and thermal performance of lightweight foamed concrete. Compressive strength, flexural strength and thermal conductivity tests were conducted to evaluate the performance of crumb rubber lightweight foamed concrete. Laboratory results indicated that the strength properties of crumb rubber lightweight foamed concrete were weaker than those of conventional lightweight foamed concrete with a similar density. The compressive strength and flexural strength were reduced from 14.02 MPa to 10.66 MPa and 4.92 MPa to 3.06 MPa respectively, as the crumb rubber proportion was increased from 0 % to 45 %. However, it is worth mentioning that the optimum incorporation of 45 % crumb rubber in lightweight foamed concrete enhanced the thermal insulating performance by lowering the heat conductivity of the concrete from 1.1863 W.K−1m− to 0.9733 W.K−1m−1.
Encapsulate Materials Effect on ZnxCd1-xS White Light Quantum Dots-Based White Light-Emitting Diodes
Authors: Huang Y. X. , Chung S. R. 
Published: February 2020

Abstract
In this study, colloidal ternary ZnxCd1-xS white light quantum dots (WQDs) were prepared, which have the characteristics of broad emission window. We used epoxy, styrene ethylene butylene styrene block copolymer (SEBS), and silicone as encapsulate materials to pack the device. The results show that the Zn0.5 and Zn0.8 have band edge and surface state emission. The quantum yield (QY) and particle size of Zn0.5 and Zn0.8 WQDs is 19, 32 % and 4.5±0.5 and 3.1±0.5 nm, respectively. The white light-emitting diodes (WLEDs) were obtained by mixing WQDs with different resins, and pumping by UV chip. The luminous efficacy is 6.7 and 8.5 lm/W for Zn0.5 and Zn0.8-based WLED by using epoxy resin as encapsulate material. Moreover, the long period test can maintain 201 and 184 h for Zn0.5 and Zn0.8-based WLED, respectively. The results of this study present that the device encapsulated by epoxy resin can improve the luminous efficacy and stability of device. This outstanding finding may contribute to the future development of solid-state lighting (SSL).
Inorganic InP/ZnS Quantum Dots: Optical Properties and Fabrication in Display Application
Authors: Chumchujan Chaikit , Chung Shu-Ru 
Published: February 2020

Abstract
Inorganic InP/ZnS quantum dots (QDs) is one kind of optoelectronic materials owing to the high quantum yield (QY) and non-toxicity. In this study, green light InP/ZnS QDs with high QY were synthesized by one-pot injection method and mixed with red light CsPbBrI2 QDs as converting material. Those converting material blend with epoxy glue, and pumping by InGaN blue chip to form white light-emitting diode (WLED). The results show that the CIE of WLED provides at (0.31, 0.33) with NTSC of 90 %.
Effect of Electric Arc Furnace Dust Treatment on the Properties of Fresh and Hardened Mortar
Authors: Syahyadi R , Fauzi A , Majuar E , Rizal F , Reza M , Fajri dan 
Published: February 2020

Abstract
Electric arc-furnace dust (EAFD) is generated in considerable amounts by the electric arc steelmaking process. Use of EAFD in concrete improved many properties of concrete. Yet, the prolonged setting time even at low dosages of EAFD was a serious limitation. This phenomenon was attributed to the presence of transition metal in the material of EAFD. Therefore, it was necessary to stabilize the transition metal in an insoluble crystalline matrix. The calcination with high-temperature was done to fix the transition metal in a complex matrix with the cementitious properties. This material was called Engineered Dust (ED). The use of ED with different replacement levels of 0, 5, 10, 15 and 20% at w/b ratio of 0.5 was carried out. The results showed that the use of ED solved the prolonged setting time which the replacement up to 20% had a normal setting time of 5 to 6 hours. Furthermore, the material of ED was used up to 15% replacement level with the replacement of 20% ED that gave the lowest electric charge values in the RCPT.
Mechanical Splices for Seismic Retrofitting of Concrete Structures
Authors: Huaco G , Jirsa J 
Published: February 2020

Abstract
As an alternative to lap splicing, mechanical splices can be used for retrofit purposes. They are generally most economical than traditional lap splices when available spacing or length makes laps difficult to utilize. Mechanical splices are frequently used in new construction. However, their use is limited and not practical for use in retrofitted structures. However, if the bars to be joined do not need to be threaded in order to be connected with a special mechanical splice, such mechanical splices can be useful. It is presented a proposal of using two types of mechanical splices for retrofit purposes. Cycle Tension and cycle tension-compression tests are presented and discussed. It was found that mechanical splices are suitable and have acceptable response under seismic loads.
On-line Monitoring by Acoustic Emission of Butt Joint Structure on the Composite Fuselage Frame
Authors: Qi X F , Yang Y , Kang W P , Wang Q , Zhao G 
Published: February 2020

Abstract
Acoustic emission (AE) technique is an online and dynamic non-destructive testing technology by diagnosing sounds, applicable to damage identification of all sorts of materials and structures. In order to fulfill the requirement of on-line monitoring for butt joint structure on the composite fuselage frame in static loading, Acoustic Emission (AE) is employed in this article. The experiment research is focused on examining the damage evolution process of the specimen subjected to mechanical tests by constantly monitoring the AE and strain responses. Combined with strain results, the recorded acoustic signals are analyzed using AE characteristic parameters such as AE amplitude and AE accumulative energy to identity five different damage stages and conclude the corresponding damage style during the entire test. The outcomes of this article can be available for supplementation and improvement of the current on-line non-destructive testing research for composite structures.
Exploration and Practice of Digital Factory of Complex Electronic Equipment
Authors: Changming Hu , Yaqi Cao , Zhaoyu Zhu 
Published: February 2020

Abstract
For the characteristics of many varieties, small batch, short delivery cycle and high quality requirements of complex electronic equipment manufacturing, combined with a new generation of information and communication technologies and the research of advanced manufacturing technology, This paper puts forward the implementation framework of digital factory of complex electronic equipment, analyzes the connotation of digital factory, explores the application of digital twin in the manufacturing stage, discusses the process of data perception, fusion and analysis of digital factory, and establishes the factory production operation control platform. This paper verifies the feasibility of complex electronic equipment digital factory floor by the example of radar assembly digital factory, and provides theoretical basis and method reference for the comprehensive application of digital factory in complex electronic equipment field in the future.
Automated Platform to the Deposition of Thin-Films and Characterization Process in Fiber Optics Sensors
Authors: Josué Rodríguez-Rodríguez Adolfo , Eduardo RodríguezRodríguez Wenceslao , Iván Luis-Morales Ricardo , Cisneros-Rojas Víctor Alan , Zamorano Báez Rocío , Isidro Acosta-Morales Jose , Antonio GarcíaGarza Luis 
Published: February 2020

Abstract
In the recent years the instrumentation has focused its development in devices fabricated in fiber optic applied as sensors; these devices are useful to monitorate physical, chemical and biological variables. By the previous, it is necessary its deposition of a thin- film sensible to temperature, humidity, pH, glucose, etc. There are two technics to deposit this into a fiber optic sensor: dip-coating and layer-by-layer. In both cases, is mandatory the application of a automated plataform to manipulate the fiber optic structure when it is immersed into the films to its depositon and the subsequent characterization in different liquid mediums; applying rutines stablished by times, positions and repetitions. The previous has been developed into a Robot X-Y, controlled by LabVIEW and its hardware MyRIO with an electronic arquitecture of low cost devices; also was applied the 3D impresion based on “open software” to design utensils to manipulate the devices and materials.
Study on Lumped Magnetic Circuit in Interior PM Machines for Aircraft Electric Green Taxiing Systems
Authors: Zhang Pengfei , Hu Yaohua 
Published: February 2020

AbstractThis paper considers the possibility of adopting a V-shaped interior permanent magnet (IPM) machine for Electric Green Taxiing (EGT) application. This rotor topology of the IPM machine has been optimized to reduce the torque ripple and iron loss. An analytical lumped magnetic circuit model was adopted to minimize the total harmonic distortion (THD) of air-gap flux density for the V-shaped IPM machine. The results of analytical lumped magnetic circuit model were compared with finite-element analysis (FEA). With the optimized rotor structure parameters, the torque ripple at the maximum torque per ampere and iron loss at the flux-weakening control were investigated.
Experimental Study on the Performance of One Micro Pulsed Plasma Thruster
Authors: Du Xinru , Wu Jianjun , Tan Sheng , Zhang Yu , Ou Yang , He Zhaofu 
Published: February 2020

Abstract
In the vacuum environment, the experimental platforms of discharge waveform measurement, impulse bit measurement and electromagnetic interference testing were set up for one designed micro pulsed plasma thruster (μPPT) to study the effect of the capacitance capacity, discharge voltage and electrode pads’ spacing on the discharge waveforms and impulse bit of it, as well as the electromagnetic interference. The experimental results show that the oscillation of discharge waveforms can be reduced by increasing the capacitance capacity and the distance between the two electrodes or decreasing the discharge voltage. With the increasing of the capacitance capacity, the discharge voltage and the distance between two electrodes, the impulse bit of μPPT rises. In the frequency range of 0.8∼2.6 GHz, the work of μPPT will not cause electromagnetic interference to spaceborne equipment and its signal transmission.
A Method of On-line Monitoring for Vibration Table Bearings Based on VMD
Authors: Xiaozhou Du , Qi Xin , Haiyang Gao , Zihong Zhu 
Published: February 2020

Abstract
Aiming at the problems that the bearing inside the sliding table of the shaker used for the dynamic test of spacecraft cannot be observed and the failure cannot be known at the initial stage, an online prediction method for bearing failure is proposed. In this paper, the acceleration sensor is selected as the monitoring medium of bearing motion state response, and the VMD (variational mode decomposition) is used as the analysis method of bearing acceleration response data to calculate the harmonic components of the bearing except the fundamental wave. Through the calculation results, the failure bearing can be intuitively interpreted.
Research on Model Correction of Turbofan Engine Based on Quantum-behaved Particle Swarm Optimization
Authors: Qian Renjun , Li Benwei , Yan Siqi , Zhao Shufan , Teng Huailiang 
Published: February 2020

Abstract
In order to solve the problem that the calculation result of mathematical model and the measured data of the whole machine deviate greatly due to the conditional simplification in the modeling process and engine component difference, an engine model correction method based on Quantum-behaved Particle Swarm Optimization(QPSO) is proposed. And the engine model calculation results are compared with the measured data of the whole machine performance. The results show that using the QPSO to modify the engine model can significantly improve the accuracy of the model. Before the correction, comparing the performance calculation result of the engine model with the measured data, the maximum error reaches 4.84%. After the correction, the accuracy of the model is greatly improved, and the maximum error is only 0.966%. The correction effect is good.
Requirements Management Applied in Airworthiness Certification in the Civil Aircraft
Authors: Wang Yi , Zhang Xinai 
Published: February 2020

Abstract
The civil aircraft certification is the process, which indicates whether aircraft design complies with airworthiness regulations, or not. In recent years, requirements management has been gradually implemented in civil aircraft design, showing a method, which can implement a series of stakeholder, needs or expectation including airworthiness into specific products through requirements definition, validation and verification. Requirements are hierarchical and structured, however, the lack of technical hierarchy of regulations as provisions results in a poor correlation between regulations and requirements. This paper focuses on the research about the application of requirement based engineering method in the development of civil aircraft, and exploring how to implement the regulations in the whole life cycle of the aircraft development to effectively ensure that the regulations are fully implemented into the product requirements, and fully interacted with the system development process. To a certain extent, avoid the disconnection between the airworthiness regulations and the development process, and reduce the risk that the development of civil aircraft does not meet the airworthiness regulations.
Integrated Requirements Management of Civil Aircraft
Authors: Zhang Xinyu , Zhang Xinai 
Published: February 2020

Abstract
Civil Aircraft is a typical complex product system, which has high integration and complex management. In the initial stage of the project, identifying market and customer needs and defining high quality requirements are the key to develop products. Meanwhile, civil aircraft needs to meet the airworthiness regulations to ensure the safety of the aircraft. From the perspective of commercial operation and airworthiness compliance, it is necessary to use requirements management method to develop civil aircraft. For civil aircraft, the requirements have the characteristics of hierarchy, variety and traceability. In this paper, an integrated requirements management method and platform are proposed based on the characteristics of civil aircraft requirements. And an application of certain type aircraft is given.
Investigation on Steady State Unbalance Response of Rotor with Elastic Ring Squeeze Film Damper
Authors: Zhao Lu , Liao Mingfu , Niu Jihui 
Published: February 2020

Abstract
In this paper, the method for calculating steady state response of a rotor system with elastic ring squeeze film damper(s) is studied. The finite difference method is used to calculate the oil film pressure field which excludes the influence of rotating speed and considers the action of oil orifices starting with the governing equations of oil film. The mechanical characteristic curves of ERSFD are obtained by integrating the film pressure field, based on which the steady state response of the rotor system with ERSFD(s) is calculated by the finite element method and iteration method. The calculating response is compared with the experimental data, and it is found that the calculating response is in good agreement with the actual one, with the relative error of no more than 15%, which verifies the correctness of the above algorithm, and conclusion that the elastic ring extrusion oil film damper can be regarded as a linear element when the eccentricity journal of the journal is relatively small is obtained.
Measurement and Analysis of the Key Metrics of Information System Resilience
Authors: Jinyi Wei , Ning Li , Jing Shi , Luo Xu 
Published: February 2020

Abstract
In view of the current situation that the resilience of information systems cannot be accurately assessed, the key metrics that affect the resilience of information systems—the overall system capability, the system’s maximum absorptive capacity, the system recovery ability and the system recovery ratio, are established. And the paper shows data calculation model of the key metrics. Finally, the information system resilience analysis method is proposed, and an aerospace simulation system is taken as an example, combined with its dual redundancy and non-redundancy mechanism to test and verify, which provides strong support for the analysis of system resilience ability.
Dynamic Optimization Design of Transverse Axis Cutting Reducer
Authors: Yin Minghu , Liu Hao , Cui Yahui , Sun Feifei , Zhang Daixiang 
Published: February 2020

Abstract
Focused on the gear transmission system of a certain type of transverse axis cutting reducer, this paper firstly establishes the ADAMS virtual prototype model for calculating the dynamic load coefficient of the system, and the influence of gear modulus and tooth width factor on the dynamic load coefficient of the system is determined by multiple linear regression. Then the GA-BP neural network model for calculating the dynamic load coefficient of the system is constructed based on Genetic Algorithm (GA) and BP neural network, which makes the decoupling of the system dynamics analysis and optimization design process be realized. Finally, based on the above analysis, a multi-objective optimization design with the goal of minimizing the system volume and dynamic load coefficient is carried out. The calculation results show that the gear transmission system of the transverse axis cutting reducer is optimized efficiently, and its volume is reduced by 18.8%, and the dynamic load coefficient is decreased by 11.5%. This paper starts with the system dynamics analysis, makes the GA-BP neural network model as the bridge, and finally establishes the technical method for dynamic analysis optimum design of the transverse axis cutting reducer. The analytical technique and method can provide reference for the optimization design analysis of complex gear transmission system.
Study on the Rate of Elastic-plastic Crack Propagation of Heterogeneous Metal Welded Joints in Nuclear Power
Authors: Li G B , Xue H , Bi Y Q , Zhang L 
Published: February 2020

Abstract
In the high-temperature water environment of nuclear power, austenitic stainless steel, nickel-based alloy materials and welded joints composed thereof are the key locations for environmental cracking (EAC) problems such as stress corrosion cracking (SCC). In order to understand the crack propagation behavior and expansion rate of welded joints under the condition of abrupt and heterogeneous material properties of welded joints, this paper uses the extended finite element technique (XFEM) in the large nonlinear finite element software ABAQUS, based on the elastoplastic material model. Under the condition of welding residual stress field, the effects of different initial crack length and strength mismatch ratio on the crack growth rate of stress corrosion crack under constant load were studied. The results show that the SCC crack growth rate increases with the increase of the initial crack length. When the crack length of the initial welded joint is constant, different mismatch ratio has a certain effect on the crack growth rate. In the low ratio range(less than 1), the crack growth rate also increase if the strength mismatch ratio increase. but the crack growth rate is gradually reduce in high ratio range(more than 1). This indicates that the mismatch ratio of 1 is favorable for crack propagation, and the larger the mismatch ratio, the crack propagation is hindered.
Thermodynamic Modeling and Simulation Analysis of Double-tube Damper
Authors: Chen Yijie , Gao Xiaodong , Wan Yiqiang , Han Xiaoling , Dai Jianjian 
Published: February 2020

Abstract
At present, most of the special vehicles were also designed with a double-tube damper, which was characterized by convenient installation and low cost. However, due to the design of the oil storage cavity outside the working cylinder, the heat dissipation effect was not ideal, and the working temperature of the oil too high will accelerate the aging of the sealing member, which was also a key problem that plagues the reliability design of the damper. Aiming at the structural characteristics of the double-tube damper, the heat generation mechanism and energy conversion research of the oil were carried out, and the heat transfer coefficient and heat conduction equation of the inner and outer surfaces of the cylinder were derived. The comprehensive heat transfer expression was solved for the working medium, and the thermodynamic model of the double-tube damper was constructed. Finally, the simulation analysis of the influence of different structural parameters on the heat balance temperature were carried out, which could effectively guide the design and development of the damper.