bluuebunny/crossref_metadata_2025_split huggingface dataset:
Dirt Classification of Silicon Wafers Based on Deep Learning
Authors: Li Xingxing , Duan Chao , Zhi Yan , Yin Panpan 
Published: January 2021

Abstract
Deep learning technology is now widely used in the industry, and some irregular blemishes and stains can be solved by deep learning methods. In this paper, the deep learning resnet network is used to classify and judge the dirt that appears on the silicon chip. It is a residual network structure. The mapping relationship between layers is realized through jump connections to ensure that the number of network layers’ increases. In the process of gradient backpropagation, there will be no gradient disappearance and gradient explosion, and the goal of training deep networks is achieved. This article is to apply the resnet deep neural network on the silicon wafer image to make a certain area on the silicon wafer make the right judgment for the dirty problem.
Evaluation of the effect of two Extraction Methods on the Components of Essential oil of Trifolium pratense L. by GC-MS
Authors: He Chunlan , Zhang Gangping , Yang Zhao 
Published: January 2021

Abstract
In order to make full use of Trifolium pratense L. resources, GC-MS was used to evaluate the effects of two extraction methods on the volatile oil components of Trifolium pratense L. A total of 96 compounds were identified by GC-MS from the volatile oil of Trifolium pratense L. extracted by petroleum ether (PE) method and by steam distillation (SD) method. 67 and 42 compounds were identified respectively, with a total peak area of 2.14 × 109 and 1.83 × 108 respectively. The relative percentage of the volatile oil extracted from Trifolium pratense L. by PE method was higher than that of the others, which were Tetracontane (19.70%), Oleic acid (14.21%), 9,12-Octadecadienoic acid (12.51%) and 1 - (+) - Ascorbic acid 2,6-dihydroxadecanoate (12.13%). The relative percentage of the volatile oil distilled from Trifolium pratense L. by SD method were 13 -docosenamide (28.52%), 7,9-di-tert-butyl-1-oxaspiro (4,5) deca-6,9-diene-2,8-dione (3.34%) and L - (+) - ascorbic acid 2,6-dihexadecanoate (2.34%). There were rich compounds in the volatile oil of Trifolium pratense L. Compared with SD method, PE method has higher kinds of compounds and total peak area.
Investigating the Feasibility of a Cushion Selection Method on Polyethylene Based on a Predictive Model
Authors: Li Ziyang , Li Jingran , Ding Meng , Peng Qiayuan 
Published: January 2021

Abstract
Cushion materials are very popular and widely used in various applications. Cellular solid has been used for cushioning for many years due to its low weight and high energy absorption capacity. Cushioning selection is the process of selecting a cushioning material to sufficiently cushion an object. There are a few cushion selection methods available in literature. The objective of this report is to investigate the feasibility of a cushion selection method based on predicting the impact absorption capacity from static compressive stress-strain data. This is achieved by comparing the predicted dimensionless deceleration (G) and the measured G. Polyethylene (foam) samples were used to conduct the compression test and drop test. For polyethylene, the predicted G shown higher accuracy at low drop height and became lower accuracy with increasing drop height. A dynamic factor C was introduced to account for the difference. From this report, researchers may explore the feasibility of this cushion selection method on polyethylene or even conduct experiments on other cellular solid specimens in the future.
A study on the extraction and classification of bearing features
Authors: Xu Ying 
Published: January 2021

Abstract
Bearings are the key components in rotating machinery equipment. The probability of failure occurring during use is relatively large. Bearings play an important role in the operation of the entire equipment. Therefore, it is of great significance to study bearing condition monitoring and fault diagnosis. This paper introduces the variational mode decomposition (VMD) method from the aspects of frequency separation, over-segmentation, initial convergence, and multi-modality of non-stationary signals, and analyzes the decomposition effect of VMD method on non-stationary signals through simulated signals The experiment proves that for non-stationary signals, the VMD algorithm can complete frequency separation well and overcome modal aliasing. Therefore, this paper uses the variational mode decomposition (VMD) method to study the bearing component failure, focusing on the analysis of the vibration signal of the rolling bearing failure under the background of strong noise.
Research on Detection Method of Sheet Surface Defects Based on Machine Vision
Authors: Huang Yuanmin , Yi Ming , Yang Weihang , Yang Man 
Published: January 2021

Abstract
The paper is based on machine vision technology to study the detection of sheet surface defects, designs the hardware system and software processing flow of online detection, introduces processing methods such as image preprocessing, image segmentation and target extraction, and processes the defect images accordingly. Use C# software to design the human-computer interaction interface and on-line debugging and on-line detection for the online detection of sheet defects. The experimental results show that the detection method is feasible, the false detection rate is low, and it can be well applied to the online detection of wood automatic production process.
Applications of Fibrin Tissue Sealant
Authors: Zhang Yuhan 
Published: January 2021

Abstract
Tissue adhesive is a newly discovered way to replace sutures. It has been proved to be biocompatible, biodegradable, nontoxic and possesses a fast application procedure that makes surgery more effective. Tissue adhesives have been largely created from fibrin, one of the first type of naturally derived sealants, and which has widespread applications such as surgery and drug delivery. Several types of non-fibrin tissue adhesives include synthetic cyanoacrylate, aluminum-based Bio-Glue and collagen-based adhesive. Compared to non-fibrin tissue adhesives, fibrin is more biodegradable and non-toxic. This paper will mainly focus on the applications and properties of fibrin sealants and briefly introduce the non-fibrin types of tissue adhesive.
Fe2O3-modified activated clay as Heterogeneous Catalyst for Fenton-like oxidation of the removal of methylene blue in wastewater
Authors: Ning Mencui , Yang Guisheng , Li Li 
Published: January 2021

Abstract
The Fe2O3-modified activated clay catalysts were prepared by precipitation method and were characterized by SEM, and XRD techniques. The catalysts were used a s heterogeneous Fenton catalysts for degradation of simulated methylene blue solution. The effects of initial pH value, H2O2 dosage, and catalyst dosage and reaction temperature on methylene blue removal rate were investigated. The results showed that, under the optimal conditions of initial pH value 3.0, H2O2 dosage 1200 mg/L, catalyst dosage 6.2 g/L and reaction temperature 30°C, 98.3% of decolorization efficiency was achieved within 60 min in a batch process. The results indicated that Fe2O3-modified activate d clay was a promising catalyst for the heterogeneous Fenton system.
Analysis of electricity production through photosynthesis in tropical climate plants
Authors: Cedeño Steven , Mora Kimberly , Juan Lata-García 
Published: January 2021

Abstract
A modern and competent world demands technological innovation in all areas, in the field of electricity, it has gained impressive strength since the development and implementation of clean energy sources, with advances in energy generation that we could hardly have imagined in the last century, but the need for consumption is increasing and the integration of systems capable of producing electricity in a sustainable and economic manner has never been more imperative. The use of a prototype biological cell composed of an external circuit and configured in such a way that it is possible to obtain levels of electrical energy, presents a future option for the self-sustainable development of electricity, everything is carried out together with the photosynthetic process of the plants, in the studied configuration, the oxidation of organic molecules release protons and electrons that travel through the anode and cathode properly integrated, resulting in a flow of energy easily measurable.
Experimental study on regeneration performance of the heat localization method for absorption air-conditioning system
Authors: Zhang Wanshi , Wu Yunlei , Li Xiuwei 
Published: January 2021

Abstract
Due to serious energy shortage, it is urgent to reduce energy consumption from burning of fossil fuels. Driven by low-grade heat, absorption system is a promising energy conservative air-conditioning system for buildings. However, the main obstacle is the poor performance as a result of the energy waste in conventional thermal regeneration process. With the aim of performance improvement, a heat localization method is proposed for the regeneration process of absorption system. It can improve energy utilization efficiency through thermal energy localization on the evaporation surface. Preliminary experiments have been conducted to test the regeneration performance with this new method. Some parameters have been investigated with the experimental data. Moreover, by comparison between the heat localization method and traditional heating method, it indicates the energy utilization efficiency with the heat localization method are 1.8 to 2.8 times higher than that with the traditional heating method. The performance of the system has been greatly improved. The energy utilization efficiency of the regeneration process can reach 36.9% under certain working conditions. With the performance improvement, the popularization of absorption system will be promoted.
Quantification of Citarum watershed damage for flood control efficiency
Authors: Safarina Ariani Budi , Chairunnisa  , Farfian Roni , Hatmoko Waluyo , Sadidah Muthiah 
Published: January 2021

Abstract
Watersheds damage causes disturbance to the river system and floods. Watershed performance can be monitored regularly through parameters to avoid damage. The purpose of this study is to formulate a quantification of watershed damage based on the flood parameters. This research was conducted in the Citarum River Basin located in West Java Province, Indonesia. The method used is an analysis of the rainfall-runoff model on four Citarum tributaries, namely Citarik, Cisangkuy, Cilember, and Cimahi River. The unit hydrograph resulting from modeling is derived to load discharge using the convolution method. Effective rainfall is determined based on runoff coefficients derived from land-use maps. The discharge capacity of the river is determined by measuring the cross-section of the river near the branching location. Indicator of watershed damage is the ratio between load discharge (Qload) and river capacity discharge (Qcap). The watershed is categorized as damaged if Qload/Qcap > 1. The level of watershed damage is measured by the damage index ID = ?Q/Qcap. Damage categories are low, moderate, and severe. Based on the results of the study, Cimahi river area is not damaged. Citarik River and Cisangkuy River are categorized as low damaged and Cilember River is heavily damaged.
Analysis of the indoor fire risk based on the Pyrosim simulation
Authors: Zhang Hong , Yan Gaopan , Li Mingjun , Han Jinsheng 
Published: January 2021

Abstract
In order to study the effects of different fire conditions on the indoor fire process, this paper uses Pyrosim to perform a fire simulation of a simple indoor room in the paper, we have compared and analyzed the changes of the temperature, the smoke layer height, and the heat flow in two different conditions with the window and door being open, or with the window closed but the door opened 30 seconds later after the fire broke out. Pyrosim simulation results show that in the first 30 seconds of the fire outbreak, the fire development has nothing to do with the opening and closing of doors and windows. In the middle and late stages of the fire, when the door and window are fully open, the temperature and heat flow of the simulated room are low, and the height of the smoke layer from the ground is high. In the simulated room, with the window closed and the door opened after 30 seconds, the maximum temperature in the simulated room was about 10 higher than that in Condition 1.
Effect of Fly Ash Content on Properties of Fibre Reinforced Cementitious Composites
Authors: Yu Baoying , Zhou Jianwei , Kong Yaning , Gao Yuxin , Yang Wen , Cheng Baojun 
Published: January 2021

Abstract
The effects of 20%, 30% and 40% fly ash on the properties of fibre reinforced cementitious composites were studied. The results showed that the fresh slurry changed from shear thinning to shear thickening with the increase of fly ash content. The flexural strength of specimens increased slightly, but the compressive strength of specimens decreased with the increase of fly ash amount. Moreover, the flexural strength of all specimens showed different degrees of shrinkage over time. With the increase of the content of fly ash, the elastic modulus of specimens decreased.
Analysis of problems in building ventilation energy-saving design
Authors: Wang Shouchuan , Li Siwen , Zhou Yuwen , Ge Tan , Wang Xiaoguang 
Published: January 2021

Abstract
With the development of modern science and technology, the work of all walks of life has been further improved, and related content has become more abundant. Building construction is a problem that people attach great importance to now. Only by better grasping the relevant content, developing the core strength, and improving the strength of the enterprise can practical problems be effectively solved. Building ventilation and energy-saving design is one of the important aspects. The problems in the ventilation design are handled well, the analysis is carried out accurately, and effective solutions are grasped to ensure the quality of the design, so as to play an active role in the development.
Ground Settlement analysis of Metro Interval using PBA method in the Loess region
Authors: Wu Hao , He Baobing , Luan Guitao , Zhu Junhao 
Published: January 2021

Abstract
In the construction of urban subway, the control of surface settlement has become the key and difficult point in the construction. As a common method in subway tunnel construction, PBA method has been widely used in many areas in China. This method performs well in settlement control. In addition, the supporting system of piles, beams, and arches formed during the construction process of this method effectively avoids the impact of the open-cut method on urban traffic. Therefore, this paper will combine the engineering conditions and the existing research results to simulate the various construction stages of the subway interval excavation in the loess area by establishing a Midas model. Combined with the results of numerical simulation, four increasing stages of surface settlement and corresponding settlement ratios are obtained, and the characteristics of surface settlement troughs are analyzed. This research is helpful to further understand the increasing law of ground settlement during the construction of metro interval in loess area.
Curriculum system design for intelligent construction based on VR technology
Authors: Zou Jixue , Zhang Jin 
Published: January 2021

Abstract
With the emergence of AI, IOT, 5G technology, cloud computing and other terms, the digital era has significantly arrived, the national universities cultivate new engineering complex talents who adapt to the new era, which will bring great significance to promote technological innovation in the construction industry, and most institutions combine their own positioning to carry out professional reform in order to actively embrace industry changes. The purpose of this article is to explore the construction of intelligent construction professional curriculum system based on VR technology under the new situation, with the aim of innovating the layout mode of intelligent construction professional curriculum system, improving the training effect of new engineering intelligent construction talents, adapting to the development of information technology, and promoting the innovation of engineering construction technology.
Application of fractal theory in diagnostics of composite materials
Authors: Akhmetkhanov R S 
Published: January 2021

Abstract
The article presents the results of studies to identify the features of diagnostic acoustic signals when defects are detected in composite materials using the methods of the theory of fractals. The use of the analysis of the spectral power density (PSD) and wavelet spectra of these signals did not lead to the detection of significant quantitative differences in the acoustic signals during the process of sample diagnostics (panel 4 mm thick). Acoustic signals from the standpoint of analyzing the characteristics of multifractal spectra were analyzed. It is shown that the defect state of the sample corresponds to the monofractal characteristic of the multifractal spectrum.
Quality control of composites
Authors: Berezin A V , Maidanov I S , Smelov S A , Gadolina I V 
Published: January 2021

Abstract
According to the kanban (just in time) system, any production system needs continuous improvement. Possessing excellent mechanical properties, composite materials demonstrate a significant variation of properties (in particular, strength indicators). The composite manufacturing process is multi-stage and requires optimization after thoughtful consideration of the nuances. Exploratory data analysis was applied as a first step for this analysis. It serves as a basis for further experimental research, which it is desirable to carry out using the mathematical theory of experimental design. After the first stage of the study of the process, namely, the study of the statistical reproducibility of the technological process, in order to obtain more complete information about the process, it will be necessary to introduce additional influences on it.
Threshold level of cast railway steel loading in the process of operation
Authors: Lebedinsky S G , Moskvitin G V , Pugachev M S 
Published: January 2021

Abstract
The authors studied the pattern of fatigue cracks distribution in railway J02002-type grade steel at threshold level of operational loading. The study was based on simulation of operational load combining the conditions of straight and curved part of the road. The load level reduction was based on the pattern of the change of the tested sample hardness with the development of the crack. The authors found the relation between the load level reduction, the crack growth rate and the number of load units. They determined the coefficient of similarity of operation loading form, at which there is no fatigue crack growth in the steel under consideration.
Development of models for risk analysis and optimization of risk reduction costs
Authors: Panov A N , Reznirov D O , Yudina O N 
Published: January 2021

Abstract
The article deals with the actual problem of risk analysis and management in the technosphere. Proposed and developed: classification of risks (events, variations, bifurcations); risk analysis structures; risk management structure of variations and bifurcations; models for optimizing the cost of risk management.
Technological biomechanics of fibrous composites
Authors: Polilov A N , Tatus N A 
Published: January 2021

Abstract
There are numerous examples of using Natural solutions in technology, especially, in design of composite structures [1]. Bio-inspired methods (suggested by Nature) are widely used in human activity. For instance: how does branch-trunk connection work? You can break a branch, but nearly impossible to tear the branch off the trunk. The connection turns out to be stronger than the part itself. So far, designers of composite products can only dream of such methods of joining.
Ceramic coatings synthesis on valve metals and alloys by micro-arc oxidation
Authors: Rakov D 
Published: January 2021

Abstract
The most pressing tasks in engineering and materials science are the synthesis of high-quality coatings with high durability and corrosion resistance. This paper presents ceramic coatings synthesis on valve metals and alloys by micro-arc oxidation. The synthesys based on advanced morphological approach. The approach is to generate a sequence of algorithms, comparison and selection of the set of rational variants of technological solutions. The approach allow to reduce the dimensions of the morphological set and improve the efficiency of search procedures.
Damage accumulation in cyclically stable steel under low-cycle loading and elevated temperature
Authors: Romanov A N 
Published: January 2021

Abstract

Based on the strain-kinetic fatigue fracture criterion, the kinetics of accumulated damages in structural carbon steel under low-cycle loading at an elevated temperature (150°C), at which the material begins to develop stress aging processes, is estimated. It is shown that stress aging, strengthening the material, narrows the durability area in which there is quasistatic destruction, the limiting case of which is the buckling failure of plastic strain, like single static destruction. This increases the fatigue fracture range, the limiting case of which is the formation of the primary fracture. The recoverable plastic strain causes the main damaging effect. Stress aging contributes to an increase in damage from elastic strain, although in the area of low-cycle failure, the share of damage from elastic strain remains small, growing with increased durability, and in the area of multi-cycle fatigue, this share becomes prevalent. Hardening from stress aging inhibits the development of damage from the one-way accumulated strain. The author confirms the validity of applying the strain-kinetic criterion of fatigue fracture to describe the damage kinetics and limit states during the cyclic elastic-plastic strain of carbon steel in the presence of weak stress aging.
Nonlinearity of the stress-strain dependence of quasi-isotropic CFRP laminate under re-static loading
Authors: Severov P B 
Published: January 2021

Abstract
As part of the task of studying the degradation of material properties under re-static loading of a quasi-isotropic CFRP laminate the nonlinearity of the stress-strain dependence in the areas of active deformation is proved. The optimal curve approximating the experimental data from the point of view of the problem is chosen. The change in the derivatives of this curve can be use σ to assess the degradation of the material properties during re-loading.
Active polymeric reducing agent for self-healing asphalt concrete
Authors: Inozemtcev Sergey , Korolev Evgeniy 
Published: January 2021

Abstract
The possibility of using an active polymer component as a reducing agent for the implementation of the self-healing of asphalt concrete technology is considered in the paper. It was found that the thiol-containing urethane AR-polymer is an effective reducing agent capable of replacing traditional reducing agents based on hydrocarbon oils. AR-polymer is a reducing agent that can be encapsulated using alginate technology. The volume of the reducing agent in the capsule is limited to a maximum allowable value of 83±1%, which can be achieved using the alginate technology. It has been proven that the type and properties of the reducing agent does not affect the change in the mechanical properties of the capsules. The strength of the capsules decreases by 2…6% for different ratios of RA/A when the content of sodium alginate decreases from 3.33% to 2.08%. The greatest efficiency of capsules with the maximum content of AR-polymer as a reducing agent and higher strength is achieved when using emulsions containing 2.50% sodium alginate at RA/A = 5.0 ± 0.2.