bluuebunny/crossref_metadata_2025_split huggingface dataset:
Research on Terrain Recognition for Gait Selection of Hexapod Robot
Authors: Zhou Xiang , Wei Wu , Gao Yong , Li Kuilin , Chen Ruidong 
Published: October 2019

Abstract
In order to improve the stability of the hexapod robot walking in different terrains, this paper adopts the strategy corresponding to the terrain environment and the motion gait, that is, the robot selects the gait that keeps the robot walk safer and more stable according to the identified terrain. In this paper, using the self-established data set, Terrain6, for terrain classification, the feature extraction of terrain images for hexapod robot is realized firstly based on the Convolutional Neural Networks and the transfer learning. Secondly, according to the stacking fusion method, a terrain recognition model with higher precision is obtained by integrating three terrain classification models include the support vector machine, the naive Bayes and the random forest algorithm. Finally, the experiments show that the hexapod robot selects suitable gait based on the result of terrain recognition to cross complex environment, and the stable and efficient motion of the robot verifies the validity of the research results.
Research on Optimum Laying Method for Increasing Underground Power Cable Ampacity
Authors: Pang Dan , Wu Haipeng , Dai Bin , Zhao Changpeng 
Published: October 2019

Abstract
When the cables are laid with equal spacing, its ampacity is limited due to the mutual heat effects. In order to increase the ampacity of the cable group, an optimum laying method with unequal spacing is proposed in this paper. The constraint function is that the temperature of all cables is lower than the upper limit, and the objective function is that the ampacity of cables is maximum. The constrained problem is transformed to an unconstrained problem by constructing a penalty function. The results show the effectiveness of the proposed method. The ratio of the increased ampacity increases with the increase of cable numbers.
Design and Implementation of HVDC System Power Automatic Control
Authors: Liu Yi , Rao Guohui , Zhang Haoran , Shao Ruibo 
Published: October 2019

Abstract
With the increasing number of UHVDC transmission projects in China, the design, construction, operation management and equipment manufacturing level of China’s HVDC transmission projects are also in the leading international level. But the equipment of converter station in our country is basically in operation state, and the dispatch adjusts power frequently according to various reasons. Manual power modification by operators is not only cumbersome and prone to make mistakes, but also easy to incur bad records for inquiring. In this paper, through an automatic power technology, the standard power curve of dispatching is imported into the operator control system, which runs automatically through the operator control system. The automatic power curve setting process realized by the method can reduce the manual operation, reduce the probability of misoperation, and improve the operation reliability. Operators are very satisfied with this automatic power curve, which greatly improves the efficiency of converter station.
Analysis of the dynamics of movement landing vehicle with an inflatable braking device on final stage of trajectory
Authors: Koryanov Vsevolod V. , Kazakovtsev Victor P. , Griselin Helene , Danhe Chen 
Published: October 2019

Abstract
For various missions that are currently being designed and planned at the present time, it is necessary to ensure reliably the stage of landing on the surface of the planet. Among the currently proposed devices that help to perform the landing of the landing vehicle, a separate interest is inflatable devices. Using inflatable device instead of rigid device has advantages, such as a small mass and a great compacity. Studies have focused on the angular motion of landing vehicles entering the atmosphere, with allowance of small asymmetries. During the descent in the atmosphere, the landing vehicle and its braking device are subjects to important perturbations, due to external environment. Thus, the inflatable device can be deformed, due to its flexibility, and the movement can become unstable. In the paper is analyzes the movement of such a landing vehicle, which uses such special devices made of inflatable devices. The paper is devoted to the analysis of movement at the final stage of landing - approaching the surface, touching the surface and further interaction with the surface. As a result, it is concluded that the most unfavorable approach to the surface, when the resulting overload is of the greatest importance.
The basic set of test problems for ODE system solvers
Authors: Manichev Vladimir , Zhuk Dmitriy , Feldman Emiliy 
Published: October 2019

Abstract
Known mathematical packages, MATLAB, Maple, Mathematica, MathCAD and others may get wrong, often plausible, the result of numerical solution of ODE systems with low, given by default, the requirements for mathematical accuracy of the results of the numerical solution of ODE systems. Since ODE system parameters obtained usually experimental, with a low mathematical precision, so the requirements for the precision of the results of mathematical solutions of ODE systems is low (for example, in MATLAB package required precision is 0.001). The article offers a basic set of tests to assess the range of applicability of the relevant solvers. The basic set of test problems for ODE solvers systems include linear ODE systems with the known analytic solution and nonlinear systems with known graphics solution. Presented comparative results of solutions for proposed problems using MATLAB solvers and manzhuk program from a library of standard mathematical programs SADEL (Sets of Algebraic and Differential Equations solvers Library), which has been designed for reliable and accurate solving of systems of linear algebraic equations (LAE) and ODE systems. The results can be used in mathematical modeling of dynamic systems described by ODE systems.
Bearing Fault Diagnosis Using Structure Optimized Deep Convolutional Neural Network under Noisy Environment
Authors: Jin Guoqiang , Li Dongjie , Wei Ye , Hou Wenhui , Chen Huai’an , Jin Yi , Zhu Chang’an 
Published: October 2019

Abstract
In recent years, deep learning has been gradually applied in bearing fault diagnosis thanks to its powerful learning and representation ability. However, deep learning-based methods are usually computationally intensive and have redundant parameters. In this paper, we propose an end-to-end structure optimized deep convolutional neural network for bearing fault diagnosis using the local sparse structure. The width and depth of the network are increased and the redundant parameters are reduced while maintaining the representation capabilities and performance of the network. The local sparse structure increases the computational efficiency and reduces the risk of overfitting. The proposed method directly employed the raw signals as input without extra feature extraction with the ability that could distinguish both the bearing fault types and the corresponding severity. Experiments show that the proposed method achieves similar performance compared to the original method by using 46.47% parameters as used in the original study, even under the noisy environment.
The modeling of the efficiency in the new generation manufacturing-distributive systems based on the cognitive production factors
Authors: Omelchenko Irina , Drogovoz Pavel , Gorlacheva Evgeniya , Shiboldenkov Vladimir , Yusufova Olga 
Published: October 2019

Abstract
The paper envisages the analysis of the new generation manufacturing-distributive systems. The particular attention is paid to the production function as the analytic instrument allowed evaluating the interrelation between economic results of an enterprise and production factors, which includes the cognitive production factors as well. The rationale for the enlargement of the traditional production functions by means of the transfer from the multiplicative to the logistic dependence has been analyzing. The results of production function modelling on the base of the logistic dependence have been depicted on the open data of a high tech enterprise from 2009 till 2018. The results of production function modelling have shown that the usage of logistic dependence has allowed tracing more precise the transition of production factors to the other path dependency. The inclusion of the cognitive production factors has allowed evaluating their contribution to the economic results of a high-tech enterprise. This work is still in progress and the presented results are preliminary and would be added and specified by the additional research.
Sensor subsystem design for small unmanned surface vehicle
Authors: Kolev Georgii , Solomevich Ekaterina , Rodionova Ekaterina , Kopets Ekaterina , Rybin Vyacheslav 
Published: October 2019

Abstract
The construction of unmanned vehicles is a major trend in a modern robotics and automation. One of the promising branches is the development of unmanned boats and surface vehicles (USV). They possess the great variety of possible applications, including environmental studies, military and security issues. In this paper, we consider the design and rapid prototyping of sensory subsystem for small-sized USV. The proposed sensor system incorporates the lidar, Doppler radar rangefinder and video camera in a waterproof housing. The housing is made with additive technology and provides the efficient and rigid placement of chosen set of sensors. The circuitry and design of the sensory subsystem are given and discussed in comparison with existing solution. The prototype of the system is described and the results of its experimental testing are provided.
Application of Structural Similitude for Scaling of a Pressure Vessel
Authors: Batul Beenish , Sohail Abeera , Aizaz Ahmad , Jamil Zukhraf 
Published: October 2019

Abstract
Pressure vessels find their use in various fields, ranging from gas cylinders used in households for cooking, boilers for steam engines, fuselage of aircraft to solid rocket motors used in missiles and space shuttle. The design of such vessels is validated by performing tests on full scale prototypes. Mostly the testing of such vessels is cumbersome and expensive. This paper establishes the method to reduce the cost for testing the pressure vessels. The theory of similitude is studied to make the testing process easier by establishing structural similitude for a pressure vessel. Using similitude theory a scaled model of the prototype vessel is developed in such a way that when the scaled models’ responses are multiplied by a calculated scale factor, behaviour of the prototype could be predicted. By testing on the scaled down model, the cost of manufacturing is reduced. The pressure vessel considered here is representative of the pressures and materials used in high pressure applications. In this paper a 1/10th scaled model of the pressure vessel is developed using structural similitude theory. Buckingham pi-theorem technique has been used for dimensional analysis after studying parameters on which pressure vessel is designed and ANSYS software is used to validate the resulting pi-products. Complete similarity is achieved when predicted prototype results completely map on to prototype results.
Design and Manufacture of Miniature Testing Machine for Composite Materials
Authors: Nguyen Le Nhan , Van Quy HO , Nguyen Song Thanh Thao , Le Thi Hong Hieu 
Published: October 2019

Abstract
Today, there are many commercial test machines in industry and laboratory with many different sizes. However, their prices are high. Some laboratories made their own equipment at lower price based on their situation, demand and purpose of test. In this paper, the design of the frame structure and the operating systems, as well as the calibration of a small tensile and bending test machine for low- to medium-stiffness composite materials are presented. The construction is made of aluminum. The loading is created by an actuator which is controlled by an Arduino micro-controller. A Hocdelam USB-9090 (the same as that of NI USB-6009 but with less accuracy) data acquisition card is connected to a personal computer through an interface with load cell and strain gauge by the amplifier to record the force and the displacement during a test. The rate of loading is identified by the rate of actuator which is maintained stable thanks to the adjustment of PWM (Pulse Width Module) with Arduino. The machine is able to conduct tensile and bending tests with a loading up to 3000 N with a sensitivity of 1 N. It is possible to conduct tests on composite specimens at speeds of 1.7 ~ 300 mm/min. This machine is able to obtain results for mechanical properties which are in good agreement with the data obtained from a commercial machine, the differences are less than 5%.
Optimal Design of Mufflers Equipped with Pod and Concentric Acoustical Rings using the SA Method
Authors: Chiu Min-Chie , Cheng Ho-Chih 
Published: October 2019

Abstract
There has been, of recently, much research on mufflers lined with sound absorbing material. In dealing with high frequency noise emitted from venting systems, a sound absorbing material inside a tube covered with a perforated plate has been used. However, the acoustical performance of mufflers equipped with one-layer of sound absorbing material has still proved to be insufficient. In order to promote acoustic performance, a design and theoretical assessment on pod mufflers hybridized with multi-layer concentric sound- absorbing rings is proposed. By using the acoustical-lumped-method, a four-pole system matrix for evaluating the acoustic performance (STL) will emerge. During the optimization process, the simulated annealing (SA) method, which is a robust scheme utilized to search for the global optimum by imitating a physical annealing process, is used. Before dealing with a broadband noise, the STL’s maximization relative to a one-tone noise (1000Hz) is offered to confirm the SA method’s reliability. To appreciate the influence of acoustical efficiency with respect to the design parameters, an analysis of design parameters (dh: the diameter of a perforated hole; W: the width of an air channel; R: acoustic flow resistivity of the acoustic fiber; σ : the porosity of the perforated plate; Df: the thickness of the acoustic fiber; L1: the horizontal length of the sound absorbing ring) is completed. Subsequently, to bring into focus the acoustical interaction with respect to the number of air-channels (between the sound absorbing rings), three types of mufflers (mufflers A∼C) hybridized with one, two, and three air-channels have been surveyed. Results reveal that for a rectangular muffler internally conjugated with one air-channel, the maximal STL is located at the desired tone, and the acoustical performance of a cone muffler will increase if the number of air-channels internally conjugated within the cone muffler increases. Consequently, the approach used for the optimal design of the STL on pod mufflers internally equipped with multiple air-channels within a space-constrained situation can be easily assessed.
Design of Switching Power Supply for Electric Vehicles with UC3842 Chip
Authors: Hsu Wei-Tai , Chi Yong-Ke , Huang Chia-Wei 
Published: October 2019

Abstract
This article is applied to UC3842 as a current mode PWM generator component, which is used to construct a single-ended flyback switching power supply with DC48V input and DC12V output. For the analysis of the instability caused by the peak current control, and the slope compensation is m=0.75m2, the duty cycle is no longer interfere with the stability of the system, which can improve the anti-interference ability of the power supply.
Stable and Robust Alternating Current Power Source Control Technique Applied to Ultraprecision Machining of Aluminum Alloy Materials
Authors: Chang En-Chih , Cheng Jerry , Tsai Yuan-Chieh , Tsai Meng-Han , Li Cheng-Syuan , Wu Rong-Ching 
Published: October 2019

Abstract
This paper develops a stable, robust control technique for AC power sources in ultraprecision machining of aluminum alloy materials that maintains low total harmonic distortion output-voltage and fast transient under uncertain interferences. The proposed control technique associates the properties of the finite-time variable structure controller (FTVSC) with the gray Bernoulli model (GBM). The FTVSC provides finite system state convergence time with non-singular advantages, which is different from the asymptotic convergence of the traditional variable structure controller in infinite time. However, once there is a highly uncertain disturbance, there will be chatter around FTVSC. The chatter produces high voltage harmonics in the AC power source output, which reduces the stability of ultraprecision machining of aluminum alloy materials. The GBM is used to eliminate the chatter and produce a high performance AC power source. Experimental results on a high-performance AC power source show that the proposed stable and robust control technique can result in high quality AC output voltage against system uncertainties. Since the proposed control technique is easier to implement than the existing control technique, and has high-precision tracking, fast convergence speed and efficient calculation, this paper will cause an interest in researchers of related aluminum alloy materials applications.
The Structure Design and Analysis of a Parallel Kinematic Mechanism Based on Abbe’s Principle
Authors: Chu Chih-Liang , Chen Hung-Chi 
Published: October 2019

Abstract
The purpose of this study is to design and analysis of a parallel kinematic mechanism based on Abbe’s principle can be applied to the 3D-coordinate measuring machine. In this study is the design and analysis of the parallel kinematic mechanism, which includes the mechanism design of linear drive rod mechanism and displacement sensing position coaxial, and the intersection of the three linear drive rod mechanisms are located at the contact probe. Therefore, the design of this study improves the displacement of the linear drive rod and Abbe error resulted from the angle variation of the displacement sensor. Furthermore, the mechanism performance has been verified experimentally. Through precision tests of the machine by a laser Doppler interferometer, the linear drive rod mechanism positioning precisions are within 1μm.
Lost in the museum
Authors: Nanay Bence 
Published: October 2019

Abstract
The Greek word aesthesis means ‘perception’ and when the German philosopher Alexander Baumgarten (1714–62) introduced the concept of ‘aesthetics’ in 1750, what he meant by it was precisely the study of sensory experiences. ‘Lost in the museum’ explains that the scope of aesthetics is far wider than that of art, high or low; it includes much of what we care about in life. It is not the job of aesthetics to tell you which artworks are good and which ones are bad or to tell you what experiences are worth having. Aesthetics is a way of analysing what it means to have these experiences. Aesthetics is, and should be, completely non-judgemental.
Efficacy of an Internet-Based Community Reinforcement and Family Training Program to Increase Treatment Engagement for AUD and to Improve Psychiatric Health for CSOs: A Randomized Controlled Trial
Authors: EÉk Niels , Romberg Karin , Siljeholm Ola , Johansson Magnus , Andreasson Sven , Lundgren Tobias , Fahlke Claudia , Ingesson Stina , Bäckman Lisa , Hammarberg Anders 
Published: October 2019

Abstract

Aims
Community Reinforcement Approach and Family Training (CRAFT) is a support program for concerned significant others (CSOs) to identified persons (IPs) with alcohol use disorders, with the purpose of engaging IPs to treatment and to improve CSO functioning. The purpose of the present study was to investigate the efficacy of an internet-based version of CRAFT (iCRAFT).

Methods
Randomized controlled trial comparing iCRAFT with a wait-list (WL) condition with a nation-wide uptake in Sweden. A total of 94 CSOs to a treatment refusing IP, who described the IP according to DSM-IV criteria for alcohol dependence or abuse, were included in the study. iCRAFT consisted of five weekly administered therapist-guided modules with the following content: (a) improve CSOs’ own mental health, (b) improve the CSOs skills in asking the IP to seek treatment, (c) positive communication skills training, (d) contingency management of IP drinking behavior. Main outcome measure was IPs initiative to seek treatment measured at 24 weeks. Secondary outcomes were IP’s daily alcohol consumption, CSOs mental health, quality of life and relational satisfaction.

Results
Of 94 participants, 15 CSOs reported IP treatment initiative during the study period. Of these, 10 belonged to the iCRAFT condition and five to the WL condition. The difference between conditions was nonsignificant, and the results were inconclusive. Participants in iCRAFT showed short-term improvements regarding depressive symptoms, quality of life and relational happiness.

Conclusion
This study was unable to demonstrate substantial changes in the iCRAFT program regarding IP treatment seeking or CSO mental health.
Lifelong recurrent takotsubo cardiomyopathy: a case report
Authors: Chandy Shekinah , Dawson Dana K 
Published: October 2019

Abstract

Background
Takotsubo cardiomyopathy is a transient left ventricular dysfunction with an established recurrence rate in populations, however, recurrences in the same individual have not been well described.

Case summary
We present a 76-year-old woman who had likely a total of six recurrent takotsubo cardiomyopathy episodes spanning over 33 years. Her diagnosis of takotsubo cardiomyopathy was first made in 2014 when she presented with chest pain, raised cardiac enzymes, and the presence of normal coronary arteries. Cardiac magnetic resonance was performed, ruling out any current or previous myocardial infarction. Subsequently, she had two further recurrences in 2015 and 2018. Stressors were identified on three occasions. She was diagnosed with ‘myocardial infarction’ in 1986, 1988, and 1998 when she presented with chest pain and electrocardiogram changes, despite demonstrating normal coronary arteries on each occasion.

Discussion
This case demonstrates three confirmed recurrent episodes of takotsubo in the same individual, showing three different left ventricular phenotypic morphologies on the background of three previous episodes of ‘myocardial infarction with normal coronary arteries’, which most likely might have been takotsubo episodes as well. Any myocardial infarction-type injury was definitely ruled out in the 2014 admission instigating a potential change in this patient’s past medical history and implicitly requirement for lifelong secondary prevention. It is notably difficult to make a confirmed diagnosis of takotsubo cardiomyopathy back in 1986, 1988, and 1998 due to the lack of awareness in this novel topic.