bluuebunny/crossref_metadata_2025_split huggingface dataset:
The design of smartcar based on ATMEGA2560
Authors: Liang Xuan , Chen Shiyong 
Published: January 2021

Abstract
With the development of automotive electronics and robot intelligent technology, intelligent vehicle has become a research hotspot in the field of automatic control. Intelligent vehicle control use automatic control, pattern recognition, sensing technology, electronics, electrical, computer, mechanical and other disciplines. Sensor technology is a very important part in the process of intelligent vehicle automatic driving, Infrared alignment tube is a kind of sensor commonly used in navigation. In this paper, it will first introduce the background of smart car, then the design of smart car software and hardware. After that, the code structure will be introduced. Finally, an intelligent car with the functions of navigation, ranging, automatic parking and searching for beacons will be designed.
Research on the Mechanism Model of Carbon Composite Material Damaged by Erosion in the Thermal Field of Single Crystal Silicon Furnace
Authors: Wang Jiajun , Wu Fengzhi , Wu Jianxing , Cai Chouai , Liu Wenyi 
Published: January 2021

Abstract
Aiming at the problem of the short service life of the carbon/carbon pot wall caused by continuous silicification during the pulling process of single crystal silicon, the paper analyzes the failure mode of the carbon/carbon pot wall and analyzes the influence of the pot wall in the single crystal silicon furnace thermal field. The mechanism of erosion damage. It is concluded from the use situation that the carbon/carbon composite crucible can be used in the field of Czochralski single crystal silicon, and its performance is far better than that of the graphite crucible, and the destruction mechanism of the carbon/carbon composite crucible is analyzed, and solutions are proposed. Through the analysis of the entire industry, carbon/carbon composite crucibles will replace graphite crucibles and become the preferred material for the thermal field of Czochralski silicon single crystals in the future.
Adsorption of Heavy Metal ions and Antibiotics from Aqueous Solution on Activated Carbons Prepared from Agricultural Waste
Authors: Deng Wenxin 
Published: January 2021

Abstract
The contamination of water by heavy metal ions and antibiotics is presently a serious environmental challenge of the world. This work intends to use activated carbons made out of agricultural waste to alleviate the problem of water pollution. Commercialized coconut shell activated carbon was used for the experiment. Cadmium ions and chloramphenicol were selected as the model compounds for heavy metal and antibiotics in water solution. TOC analyzer and the atomic absorption spectrophotometry were used to determine the concentration of antibiotics and metal ions in solution, respectively. The coconut shell activated carbon turned out to be efficient in the adsorption of metal ions (removal efficiency up to 90% when concentration is 1mg/L) and chloramphenicol (removal efficiency up to 40% when concentration is 1ml/L). The rates of adsorption of both cadmium ions and chloramphenicol were high at first but declined as the contact time increases. The competitive adsorption was investigated in this study by using a mixed solution of cadmium nitrate and chloramphenicol. It was found that the adsorption capacity of chloramphenicol of activated carbon remains the same while the adsorption capacity of metal ions sharply dropped by 44%, indicating that Cadmium ions have no obvious effect on the adsorption of chloramphenicol, whereas chloramphenicol hinders the adsorption of cadmium ions.
Ultrasonic Nondestructive Testing Method for Mechanical Properties of Metallic Nanomaterials
Authors: Li Jiabing , Zhong Rui , Shen Xingwang , Gao Ziyun , Zhang Junwei , Miao Hansen , Zhang Ziqian 
Published: January 2021

Abstract
For metallic nanomaterials, the small size scale of nanoparticles leads to a significant increase in their surface area, resulting in a series of new mechanical properties. In order to detect the mechanical properties of metal nanomaterials, a new ultrasonic nondestructive testing method is proposed. Using defocusing measurement and time discrimination method, the surface wave velocity of metal nanomaterials at different positions and angles was measured, and the mechanical properties at corresponding positions and angles were obtained. The experimental results show that the new ultrasonic nondestructive testing method can accurately characterize the mechanical properties of metal nanomaterials without causing damage to the tested objects.
Multi-dimensional Park Portrait Model Based On Clustering
Authors: Zhang Linjuan , Xu Changqing , Wang Lili , Li Chenxi 
Published: January 2021

Abstract
With the rapid growth of the social economy, the number of various types of parks in China has increased significantly. Faced with the increasing difficulty of man aging the power consumption of parks, qualitative analysis labels such as industrial parks and technology parks are no longer applicable, and utility companies need to develop differentiated and personalized power supply strategies for parks with different characteristics. Therefore, it is necessary to study the power consumption characteristics of t he park more detailed. A multi-dimensional park portrait model is proposed in this paper. Firstly, based on biclustering algorithm, the user's power consumption data are analyzed. Then the combined forecasting model is stablished to analyze the future power consumption of the park. Besides, an index evaluation system is established to complete the power configuration and demand response analysis of the users’. Finally, K-means cluster analysis is performed on the analysis results to obtain the park portrait.90, 000 pieces of data and related electricity business records from Henan Province are used to verify the effectiveness of the model. The results show that the park portrait obtained by the model and algorithm can quantitatively analyze the relevant attributes of the park.
Effects of Trace Components in Reclaimed Water Sludge on Wet Flue Gas Desulfurization Process
Authors: Liu Zhe , Li Xiaohui , Cai Xiangdong , Guo Yue , Liu Gaojun , Du Lei , Li Qing 
Published: January 2021

Abstract
The paper designed and built a simulation reaction system for the Wet Flue Gas Desulfurization(WFGD) process to analyze the effects of factors on the Oxidation reaction of SO2 for the reuse of reclaimed water sludge. Six trace components including magnesium, iron, chloride, aluminum, PAM and PFS in reclaimed water sludge from reclaimed water softening were selected for analysis factors. The effects of six factors on the oxidation reaction were tested by single factor experiments. The multi-factor effects on the oxidation reaction was studied by adding different proportion of reclaimed water sludge to the desulfurizer of the simulated reaction system. In addition, the effect of reclaimed water sludge on the crystallization and dehydration of desulfurization slurry was analyzed. The results show that six factors have little effects on the SO2 oxidation rate in the test range. The addition of reclaimed water sludge has a significant effect on the crystalline form and dehydration of gypsum.
Analysis of the status quo of green building operation management and countermeasures
Authors: He Weiyi , Zhou Baikun 
Published: January 2021

Abstract
Green buildings are of vital importance to reducing building energy consumption. In recent years, with the support and encouragement of many parties, green buildings have developed rapidly, and the number and scale of green building projects have been continuously expanded, which will undoubtedly become the future development t rend of the construction industry. However, the current level of operation and management of green buildings is low. Poor operation management and maintenance in the later stage have led to low utilization efficiency of various equipment used in green technologies. After a large number of green buildings are put into operation, they have not achieved the expected operating results. This article focuses on green building operation and management The status quo and problems of green building design innovation and the life cycle perspective of green building operation management related development strategies, in order to make up for the "shortcomings" of the expected value of green building public policy, improve the green level of green buildings, to achieve green Operational management makes theoretical contributions.
Study on the Participation of Environmental Protection NPO in Air Pollution Prevention and Control
Authors: Zhu Zhe , Wang Fang , Li Yanan 
Published: January 2021

Abstract
Environmental NPO can effectively make up for the absence of government i n the prevention and control of air pollution, and play an important role in environmental protection rights protection, citizens' awareness of environmental protection, environmental conflict regulation and environmental protection international cooperation. At the same time, there are some problems in the participation of environmental protection NPO in the prevention and control of air pollution. In this study, 36 environmental protection NPOs were selected from East, central and Western China by using probability random sampling method, and analyzed by means of triangulation and in-depth inter views. There were some problems in the current environmental protection NPOs' participation in air pollution prevention and control, such as low professional level, lack of organizational resources, laws and regulation lagged, lack of external supervision and voluntary participation. Therefore, it is necessary to further strengthen the professional capacity building of environmental NPO, improve the laws and regulations system, optimize the internal self-discipline mechanism and external supervision mechanism, and construct the integrity evaluation system and information disclosure system, so as to effectively play the role of environmental NPO in environmental protection, and promote the construction of a community of human destiny to deal with climate change.
Design, fabrication, and testing of biomass pelleting machine for coffee wastes
Authors: Bartolome G J C , De Leon S M C , Polinga C A , Roño J M B 
Published: January 2021

Abstract
A biomass pelletizer was designed and fabricated to produce pellets using coffee husks and spent coffee grounds. The pelletizer works on a principle of a rotating roller pellet mill in which power from the prime mover is transmitted to the rotating spindle at a reduced speed, and causes the roller dies to drift and press the pellet mixture through the thick perforated die plate. An unsharpened knife attached to the spindle facilitates easy detachment of pellets from the die plate upon extrusion and the perforated pellet chute separates the non-pelletized particles and fines from the pellets itself. The performance evaluation of the machine revealed an average pelleting capacity and efficiency of 1.50 kgh−1 and 92.49 percent, respectively, suitable for small-scale pellet production and also a low percentage losses (5%). The physical characteristics of the pellets produced were found to have high uniformity with an average length of 9.86±0.63 mm, diameter of 5.71±0.41 mm, mass per pellet of 0.12 g, moisture content (dry basis) of 16.65 percent, and a bulk density of 850 kg m−3. The researchers recommend that the performance of the pelleting machine be optimized by attaching a feed controller on the hopper and manipulating the speed of the roller dies. Furthermore, it will also be best to analyze the thermochemical properties of the pellets including the proximate and ultimate composition employing standard test methods.
Development of X-in-the-Loop testing system for electric vehicles
Authors: Karpukhin K 
Published: January 2021

Abstract
The paper describes an effort towards development of electric vehicles in the form of an international collaboration aimed to create an environment that combines laboratory facilities and virtual models into a single research and development system called X-in-the-Loop. The facilities included in that system are connected and shared between developers and researchers working in different geographic locations with different vehicle subsystems allowing them to synchronize their experiments in real time studying the entire vehicle rather than its separate components. The main section of the paper focuses on the part of the X-in-the-Loop project dedicated to the thermal management system (TMS) for high voltage components of the considered electric powertrain. In particular, descriptions are given regarding the control principles and the system architecture used to integrate the TMS into the X-in-the-Loop environment. The virtual part of the TMS is verified by means of simulations. Finally, the design of the thermal management system embedded into the test installation is presented in the form of a CAD model.
The natural frequency ratio between Timoshenko and Euler effect by variation of parameter
Authors: Lei Xie 
Published: January 2021

Abstract
Applied energy principle analysis natural frequency equations of Euler beam and Timoshenko respectively. The expression of natural frequency is calculated by the separation of variables. Consider the natural frequency ratio between the Euler beam and Timoshenko one to analyze the relationship between geometric parameters and frequency ratio that effect by parameters of frequency. Calculations show that the relationship between frequency ratio and geometric parameters present non-linear parabola characteristic. When the increment of geometric parameters is identical, the frequency value of the beam was lowered by both transverse shear effect and rotary inertia whereby non-linear characteristics are mainly determined by the transverse shear effect.
Feasibility study on construction of highway tunnel with large cross section in red beds geology
Authors: Zhu Junhao , Luan Guitao , He Baobing , Wu Hao 
Published: January 2021

Abstract
This paper is based on the Shanchongqing Tunnel of Yishi Expressway in Yunnan Province and takes numerical simulation to analyze the feasibility of using the three-step method to construct a three-lane large section tunnel in red beds. Through the research, it is found that the maximum displacement and settlement of the vault is -10.72mm, and the uplift value of the tunnel invert is 9.49mm; the maximum horizontal displacement of the arch waist on the left is 11.03mm, and the minimum horizontal displacement of the arch on the right is -12.52mm; the top displacement settlement extreme value is -10.72mm, the uplift value of the tunnel invert is 9.49mm, the maximum horizontal displacement value of the left arch waist is 11.03mm, and the minimum horizontal displacement value of the right arch waist is -12.52mm; the maximum axis of the left tunnel anchor rod The force is 41.82Mpa, and the maximum axial force of the bolt support structure of the right hole is 43.72Mpa. Therefore, through empirical comparison, these values meet the stability requirements of the tunnel. Comprehensively, the three-step method is feasible in the excavation of large-section V-level surrounding rock in red geology.
Sub-model stress analysis for construction process of a metro crossing passage tunnel with shield machine
Authors: Li GangGang , Chen ZhenLei , Liu ChaoJie , Lin ZhiQiang 
Published: January 2021

Abstract
This paper aims to simulate and optimize the structure stress during the construction process of a metro crossing passage tunnel with shield machine. Taking the world first metro crossing passage tunnel with shield method at Ningbo Metro Line 3 as an example, a finite element analysis model is developed to simulate the construction process. To achieve accurate results in some key structural components local sub-model approach is applied for some of sub-structures. The results obtained from the present finite element analysis are found to match well with the strain test monitoring data of the concrete segments. The obtained results also show that the maximum stress occurs at the T-joint of the starting and receiving sections during the construction process. With the progress of the construction, the stress at the T-joint of the starting section is gradually reduced, while the stress at the T-joint of the receiving section is gradually increased. Consequently, an authentic, reliable and advanced simulation process is established, which could provide technical support for the optimization of the construction process of metro crossing passage tunnel.
Risk Assessment of the construction of metro stations with open cut method based on fuzzy comprehensive evaluation method
Authors: Li Xiaolong , Wan Rongqiang , Wu Bo , Meng Guowang , Chen Huihao 
Published: January 2021

Abstract
Due to the loose structure, high moisture content and easy liquefaction of the sandy land layer in the coastal area, the construction of subway station open excavation has a high safety risk. Taking the deep foundation pit of Yufengwei station of Guangzhou Metro Line 7 as an example, this paper adopts fuzzy comprehensive evaluation method to evaluate the construction risk of Guangzhou metro station with open excavation method in the coastal area. The results are accurate and reliable, which can provide a reference for similar projects.
Effect of cement and fluidized bed combustion ashes on properties of phosphogypsum composite cementitious materials
Authors: Ma Pengfei , Li Shuang , Cheng Baojun , Yu Baoying , Gao Yuxin 
Published: January 2021

Abstract
The effect of fluidized bed combustion ashes (FBC) and cement by monodoping and compound doping on the mechanical properties and water resistance of phosphogypsum composite cementitious materials was studied, and the mechanism was explored by SEM. The results showed that the cement and fluidized bed combustion ashes by monodoping have a negative effect on the compressive strength of phosphogypsum, but can effectively improve its softening coefficient. When cement and fluidized bed combustion ashes mixed together, the softening coefficient increased with the increase of cement from 0 to 10%. But the softening coefficient decreased with the increase of cement from 0 to 20%, however, the compressive strength increased. Through the ANOVA analysis, the optimal dosage of cement, fluidized bed combustion ashes and phosphogypsum was obtained. Through the SEM, the hydration products covered on the surface of gypsum crystal, increased the compactness of the hardened body.
Peculiarities of the images of microscroches during load testing for fatigue fracture
Authors: Akhmetkhanov R S 
Published: January 2021

Abstract
The paper investigates the features of changes in the fractal dimension of microsection images during load tests for fatigue life. For this, the methods of the theory of fractals were used - the assessment of the fractal dimension of the images of microsections at different stages of loading, and their multifractal spectra were also determined. It was found that before the destruction of the sample, the multifractal spectrum degenerates into a monofractal.
Determination of tribological characteristics of polymer materials
Authors: Biryukov V P , Prince A N 
Published: January 2021

Abstract
The paper presents the results of tribological tests of thermoplastic polyurethanes (TPU) and rubber based on nitrile butadiene rubber (BNR) on rigidly fixed silicon carbide and free abrasive. The influence of pressure and sliding speed on the coefficients of friction is shown. For Elastollan 1164, the coefficient of friction and mass loss were 0.2-0.3 and 0.028 g, which is 5-7 times lower than for BNR.
Effect of strain rate on strength of unidirectional CFRP
Authors: Dumansky A M , Alimov M A , Terekhin A V 
Published: January 2021

Abstract
An analysis of the anisotropy of failure stress envelopes for unidirectional carbon fiber reinforced plastic at different strain rates, including dynamic loading, is carried out. Based on the study of transverse compressive and share strengths, a peak of the failure stress envelopes is observed, which is described by using the parabolic function approximation. It is shown that with an increase in the strain rate, not only an increase in strength but also a shift of the peaks to the area of higher transverse compressive stresses are observed.
Multiscale modeling of damage and fracture of a composite overwrapped pressure vessel
Authors: Eremin N V 
Published: January 2021

Abstract
An approach to multiscale modeling of damage and fracture of a composite overwrapped pressure vessel based on experimental studies is presented. The proposed approach takes into account the interaction of mechanical properties and structural parameters of the composite material at each scale level and their joint interaction. A micromodel of the fracture of a composite material has been developed taking into account the structural features. Calculated mechanical and strength properties of unidirectional composite material are determined. A mesomodel of fracture of a layered composite material is presented for numerical three-point flexural tests. Experimental verification of the numerical mesomodel of straining and fracture of a layered composite material has been carried out. A comparative analysis of the experimental data and numerical modeling showed the quantitative and qualitative agreement of the results. A macromodel of damage and fracture of a composite overwrapped pressure vessel is presented. The diagrams of progressive damage in a composite shell depending on the mode of fracture are presented. An assessment of the strength of the vessel structure is given taking into account the initiation and evolution of damage in the composite shell.
Calculated and experimental diagnostics of the stress state of large-sized parts of the chemical industry machines and estimation of their longevity
Authors: Petrova I M , Filimonov M A 
Published: January 2021

Abstract
A series of model and full-scale strain-gauge studies of the stress-strain state (SSS) of a large compressor connecting rod has been carried out. A computational model for assessing SSS is proposed, and its satisfactory agreement with the obtained experimental results is shown. The results of the SSS assessment are used to predict the resource for various operating options.
The substantiation of the influence of asphalt resin paraffin oil residue on the asphalt concrete technology
Authors: Bisenov Kylyshbai , Tanzharikov Panabek , Sarabekova Ulbossyn , Kodar Erden , Abildaev Nurlan 
Published: January 2021

Abstract
Based on scientific research and experimental tests, it has been proved that solid waste from oil fields in the Kyzylorda region based on asphalt resin paraffin sediment (ARPS) is close and binding in its chemical composition to the main component of the asphalt-concrete mixture of the road surface. And the most effective method of disposal and neutralization of oil waste was chosen. In this article, it is proposed to develop an asphalt-concrete technology based on asphalt-resinous paraffin deposits. The issue of increasing the reserves of raw materials for the production of durable asphalt concrete and reducing the amount of oil-containing waste in the fields due to the sale of solid oil-containing waste will be considered. Based on the study, the composition of asphalt-resinous paraffin deposits was analyzed by IR spectroscopy. The infrared (IR) absorption spectrum was captured in the IR-Fourier spectrometer. The results of the study showed the suitability of asphalt-resinous paraffin deposits for use as organic binders to dense asphalt concrete of type «B» grade III for IV-V road climatic zones recommended for applying top layers of coating on roads of technical category IY.