bluuebunny/crossref_metadata_2025_split huggingface dataset:
Research on alarm control system based on voice lock
Authors: Rui Wu , Zhao Yang , He Zhang 
Published: May 2020

Abstract
In order to realize the intelligent control and remote control of the safe and improve the efficiency of unlocking, a voiceprint unlocking system is proposed. The research uses voiceprint to control the switch of electronic lock. The core technology of voiceprint lock is speech recognition. Speech recognition technology is to convert speech signal to machine language, so that the machine can recognize the voiceprint. Because of the uniqueness of the voiceprint, compared with other unlocking methods, it has the advantages of high precision, high life, high efficiency, etc. Besides, because the voiceprint does not use the mechanical key to unlock, the efficiency of unlocking is greatly improved. The application of voiceprint recognition technology to the voiceprint lock is a high stability unlocking method, which can greatly improve the safety of the safe. Through mobile app and direct voiceprint input, the remote control of the safe is realized. The recognition rate is over 98%, which greatly improves the unlocking efficiency of the safe.
Research on Digital Pulse Compression Technology of Overlapping Data Splicing
Authors: He Panpan 
Published: May 2020

Abstract
Digital pulse compression technology is an effective technology to solve the contradiction between the maximum operating distance and the range resolution of sonar. However, in practical application, when the amount of data to be processed is large and the segmented processing is needed, the data segmentation may be unreasonable, resulting in the weak peak value of the signal after pulse compression, thus affecting the detection results. This paper introduces a method of overlapping data splicing. By improving the correlation between signal and matched filter, the problem of unreasonable data segmentation is effectively solved.
Adaptive power line communication for intelligent separate layer production with single-core cables
Authors: Changzan Liu , Bo Dang , Ling Yang , Linkang Xu , Ruirong Dang 
Published: May 2020

Abstract
Power line communication (PLC) techniques have been proven to be efficient for the intelligent separate layer production (ISLP) system with single-core cables. However, the permanent mode of the ISLP may cause a continuous change of the resistance and capacitance of the single-core cables due to the long-term effect of high temperature, high pressure as well as the vibration of the bad downhole conditions, which will have great influence on the data transmission efficiency. In this paper, we present an adaptive PLC approach for the data transmission of ISLP with single-core cables. Instead of the precise slide rheostat, program-controlled potentiometer is used to achieve an adaptive decoding algorithm for fast initialization of the ISLP transmission. Moreover, a long-term adaptive method is also proposed to adjust the gain and filter coefficients in real time according to the bit error rate of data transmission systems. Finally, experiments were conducted and the results demonstrate the effeciveness of the proposed adaptive PLC data transmission for the improvement of the efficiency and stability of the ISLP system.
The effect factors analysis of the cave formation based on the LWD resistivity imaging method
Authors: Kang Zhengming , Li Fei 
Published: May 2020

Abstract
The cave formation has strong non-homogeneity and the well logging response mechanism of it is very complex, which is of great significance to be studied. Based on the 3D finite element method, the logging response of the Logging While Drilling (LWD) resistivity imaging tool is simulated. The effects of cave diameter, cave extension and resistivity contrast between cave formation and background formation on ratio of measurement signals are investigated using a single cave model. The results show that the existence of the borehole has a great influence on the measurement signal, so it needs to be corrected or the measurement electrode of the tool should be close to the borehole. When the diameter of the cave is larger than a certain value, the relationship between the cave extension and the measurement signal can be quantitatively described. However, the resistivity contrast between the cave formation and the background formation shows a power index relationship under different cave diameter. The simulation results can provide a theoretical basis for the identification and interpretation of LWD resistivity imaging tool.
Circular Economy: Integrated Design of Fish Tank- Flower Nursery
Authors: Li Xuexia , Wang Yu , Bao Tianyong , Xiang Yirui 
Published: May 2020

Abstract
The internet of Everything has come into reality. Smart home has entered our life and changed our life style. Using traditional methods, consumption of time and labour needs to be considered for family breeding and conservation. Based on analysis and research on the application status of household flower nursery and aquarium equipment, an integration fish tank-flower nursery ecosystem was designed. An interaction between aquarium automatic water exchange maintenance and automatic watering system of flowers and plants can be designed via several techniques, where contains single-chip computer technology, open source Arduino technology and multi-sensor fusion technology. Furthermore, the goal of recycling of water can be fulfilled by using the rich water of fish culture to water flowers. Experiments show that the integrated ecosystem can replace the traditional manual maintenance, save resources and bring people a better home experience.
Characterization of asphalt binders blended with nanomaterial and polymer
Authors: Ali S I A , Abubaker A , Alshetwi A B Z 
Published: May 2020

Abstract
Modification of bitumen binders with polymers and nanomaterials has successes in mitigating various major causes of pavement failures. The aluminum oxide nanoparticles (AI2O3) and Acrylate-Styrene-Acrylonhrtilrei polymer (ASA) were poured on the base bitumen binder 60/70 penetration grade with percentages of 3, 5 and 7% by the weight of bitumen binder. The outcome shows that the inclusion of polymer modified binders (ASMBs) and nanoparticles modified binders (ALMBs) matter has a great deal of impact on the rheological behavior of the bitumen binder at intense temperatures. However, the complex shear modulus (G*) improves the mix of the two modifiers. The increment at 75 °C was 63.70% for five percent ASBMs polymer, while for ALMBs, 71.12% for five percent. Although, the modified bitumen binders show high resistivity to rutting in intense temperatures, upon increment to 80% and 59% for five percent concentration of ASMBs as well as ALMBs chronologically. The refinement of bitumen binders gives an increase in the property of the binder which is the creep recovery for approximately about 69.23% and 62.53%. The use of ASMBs and ALMBs as discovered in this study shows that both modifiers above can mitigate the issues of the bitumen binder at intense temperatures, and five percent is regarded as the maximum constituent of the two modifiers.
Analysis of increment of road traffic accidents in Libya: Case study city of Tripoli
Authors: Ali S I A , Elturki F A A , Jibrel S N 
Published: May 2020

Abstract
Traffic and highway engineers working with law enforcement officials are constantly seeking for better methods to ensure safety for motorists and pedestrians. The planning process requires that engineers collect and maintain traffic safety data, identify the hazards location, conduct studies and establish project priorities. Unfortunately, in Libya, the increase in demand for private transportation in recent years, due to poor or lack of public transportation led to some traffic problems, especially in the capital (Tripoli). Also, the growth of private transportation has significant influences on the society regarding road traffic accidents (RTAs). This study investigates the most critical factors affecting RTAs in Tripoli, the capital city of Libya. Four main classifications were chosen to build the questionnaire, namely; human factors, road factors, vehicle factors, and environmental factors. Moreover, the data was collected from 400 respondents in the study area, and the relative importance index (RII) was used to rank the factors. The results show that human factors have the most significant impacts compared with other factors. Moreover, 84% of respondents considered the over speeding as the most affect factor causes of RTAs while 81% considered the disobedience to driving regulations as the second most influential factor in human factors. Besides, 74% of respondents considered poor brakes or brake failure factors has a high impact on the RTAs among the vehicle factors, while 79% classified poor or non-street lighting factors as one of the most effective factors on RTAs in road factors. The environmental factors have slight influences on RTAs.
Modification of Hydraulic Conductivity of Sandy Soil using Seawater and Alkaline Solutions
Authors: Dawoud Osama 
Published: May 2020

Abstract
Altering soil characteristics by precipitation of the calcium carbonate between soil particles is attracting the interest of geotechnical engineers for a wide range of applications. However, current applied approaches still face challenges such as the high cost of materials, difficult handling of precursors, and hazardous by-products. The study described by the current paper investigated the modification of hydraulic conductivity of sandy soil by chemical precipitation of the calcium carbonate using seawater as the source of calcium. The designed experiment involved treatment of bench-scale soil columns by two readily mixed solutions. One of the solutions served as the source of calcium ions and the other contained carbonate ions. The current paper compares behavior of hydraulic reduction considering different resources. The results showed that the crystals formed in small sizes as a result of the instantaneous reaction of calcium precipitation; and thus, crystals transport with the solution as colloids. Accordingly, reductions in hydraulic conductivity were mainly governed by the filtration mechanisms; and the precipitated calcium carbonate was retained close to the injection point. Conducting treatment using seawater as the source for calcium ions induced 65% reduction in hydraulic conductivity at 5.5 g CaCO3/g soil. This reduction is identical to the case when the artificial source was used. Further treatment by the artificial source of calcium reduced the hydraulic conductivity of sandy soil by 97.2%. These outcomes suggest that the chemically induced calcium carbonate precipitation from seawater can be employed by some geo-environmental applications which are conducted in the vicinity of the shore and require reduction of hydraulic conductivity.
Performance of encased single stone column in layered soil
Authors: Farah R E , Nalbantoglu Z 
Published: May 2020

Abstract
Stone columns were found to be effective, economical and widely-used ground improvement technique in soft grounds. It is important to understand the behavior of stone columns when they are installed in layered soils. This paper presents results from a series of small scale laboratory model tests carried out in unit cell tank to investigate the behavior of floating and end bearing stone columns in layered soils with and without encasement, consisting of loose sand overlying a soft soil. Tests were conducted with loading only the stone column area to estimate the limiting axial capacity of stone column. Laboratory tests were carried out on a column of 10 cm diameter surrounded by layered soil. Test results indicated that the bearing capacity of layered soil has been improved in all cases of stone column applications. The non- encased floating stone columns gave better results than non-encased end bearing stone column. The inclusion of geotextile encasement resulted in further improvement of layered soil and the encased floating stone column had superior bearing capacity improvement.
Properties of high-strength concrete containing well graded rubber particles
Authors: Habib A , Yildirim U , Eren O 
Published: May 2020

Abstract
Discarding of old rubber tires is indeed a very serious environmental problem all over the world represented by a high risk for uncontrolled fires and other environmental and health hazards. It was estimated that every year about one billion tires get to the end of their life span. Recently, the construction industry has taken up the challenge to incorporate recycled materials in concrete mixtures by means aggregate replacement. Nowadays, many researches are focused on investigating rubberized concrete as a structural material due to its enhanced properties such as ductility, energy dissipation and damping ratio. Previous studies have suggested the use of fine rubber particles rather than coarse ones when high strength concrete is targeted despite the fact that using coarse ones provide enhanced energy dissipation, damping ratio and vibration behavior. This study is intended to address the effects of utilizing significant amount of well graded fine and coarse rubber aggregates on the properties of high strength concrete. On the basis of the investigations some mechanical, durability and dynamic tests will be conducted on concrete with different rubber replacement percentages. The results of the experimental works have shown that it is possible to develop high strength concrete when well graded fine and coarse rubber particles is used to replace 25% percent of the natural aggregates. Furthermore, the vibration behavior of the concrete mixture was improved considerably when high content of rubber aggregates was added into concrete.
Viscoelastic properties of EVA interlayer used in laminated glass structures
Authors: Hána T , Eliášová M , Vokáč M , Machalická K V. 
Published: May 2020

Abstract
Laminated glass is getting used more extensively in a current architecture due to its transparency, aesthetic impression, and post-breakage behaviour. Examples of such structures are balustrades, stairs, or facade panels. These are usually loaded in bending. Polymeric interlayer embedded between glass plies has no flexural stiffness, but it can itself transfer shear stress. The rate of this transfer depends on the shear stiffness of interlayer which is time and temperature dependent parameter. Producers of interlayers often do not specify this quantity thus engineers rather neglect the shear interaction of glass plies in perpendicularly loaded laminated glass panels. This paper provides the values of shear stiffness modulus of common interlayer EVASAFE® by BridgestoneTM in time and temperature domain. This shear stiffness is expressed through Maxwell model whose parameters are based on the series of Dynamic mechanical thermal analysis (DMTA) performed on single lap small-scale specimens in Klokner institute CTU in Prague. Results show that shear stiffness of this interlayer is able to provide significant shear coupling of glass plies in broad temperature range of short-term perpendicularly loaded laminated glass structures.
Surface water resource and effect of weather parameters in estimating the annual rainfall: A case study in Lebanon
Authors: Kassem Y , Gökçekuş H , Aljamal J 
Published: May 2020

Abstract
The quality and quantity of freshwater resources are continually decreasing in the world. The objective of this paper is to review the literature on the water resource with a focus on the surface water, quality of surface water in terms of physical and chemical properties in different locations in Lebanon. Moreover, one of the most important sources influencing the surface water is rainfall. Forecasting rainfall is one of the most essential issues in the hydrological cycle. It is very challenging because is still not possible to develop an ideal model given the uncertainty and unexpected variation. In the present study, prediction models using artificial neural networks (ANN) and multiple linear regressions (MLR) are developed to estimate the annual rainfall as a function of weather parameters and geographical coordinates. The annual data used in this study are recorded in 1942 locations in Lebanon. The latitude, longitude, and altitude of the location, global solar radiation, average temperature, wind speed, and relative humidity are used as the input variables and annual rainfall is estimated as the output variable. The measured values are compared versus those predicted by the ANN and MLR models by evaluating R-squared and Root mean squared error.
Moringa Oleifera seeds and Chitosan as alternatives to conventional coagulation agents
Authors: Kučera T , Hofmanová L 
Published: May 2020

Abstract
This article discusses the possibilities of using natural polymers in the water treatment process to replace conventional chemical-based reagents. Mainly part of article presented the results of a laboratory-scale research focused on the use of alternative coagulants in water treatment. Attention was particularly paid to natural cation coagulants derived from Moringa oleifera seeds and chitin. These two coagulant agents were used in laboratory research for treating real raw water. Several series of laboratory jar tests were performed to identify the effectiveness of the selected coagulants in removing turbidity from water.
The information exchange in the construction sector in the age of BIM: a multiple case study from Italy
Authors: Leto A D 
Published: May 2020

Abstract
In recent years, due to the request of public clients, Building Information Modelling (BIM) projects are more vastly deployed in construction sector. Furthermore, BIM seems to be the digital methodology with the potential of enhancing the productivity in the construction sector. However, due to the large number of actors involved in a project, the internal information flow of the same actors and the information flow among the stakeholders need to be refined. This article, therefore, by focusing on the Italian contractors’ perspective aims to examine the contractors’ internal information flow and the information exchange with the stakeholders. 13 interviews were conducted with several individuals in 3 Italian construction contractors. The informants were selected from different levels of the enterprises, spanning from the owners to the foremen. Combined with site visits, these interviews provide an insight of the contractors’ internal information flow and an overview of the information exchange among the contractors and their stakeholders.
The article highlights the current criticalities in the information exchange between the contractors and other actors of the projects. Furthermore, the study points out the opportunities of the digitalisation of the internal and external information flow that could improve the information exchange and the productivity in the Italian construction sector.
Effect of fly ash-limestone dust stabilization on volume change and strength of expansive soil
Authors: Naji J , Bilsel H , Balkis A P 
Published: May 2020

AbstractThe expansive soils in semi-arid and arid regions are affected by swelling-shrinking due to climatic effects, causing damage to lightweight structures. Various methods and materials have been employed to improve the engineering properties of these soils. This paper includes the findings of experimental work conducted studying the effectiveness of use of fly ash (FA) and limestone dust (LS) in the enhancement of the engineering properties of expansive soil sampled from Haspolat, Nicosia. Limestone quarry dust is a by-product produced in quarries as a result of the process of crushing and grinding. Laboratory experiments were conducted on the expansive soil with additive proportions of 5% LS, 10% FA, and 5% LS+ 10% FA by dry mass of the soil at curing periods of 1, 14 and 28 days. The 5% limestone dust and 10% fly ash mixed samples have shown significant increment of up to 220% in CBR value, 82% in volumetric shrinkage, and 100% in swell potential. The study has concluded that the introduction of admixtures to expansive soil generally enhanced the geotechnical properties, exhibiting greater durability and stability compared to the untreated soil. Hence limestone dust and fly ash can be regarded as effective expansive soil stabilizers, also providing cheap solutions to the disposal issue.
Some refurbishment particularities: An older building case study
Authors: Oliveira R A F , Lopes J , Abreu M I 
Published: May 2020

Abstract
Portugal has many old buildings with historical and cultural values in advanced degradation. Many of them have an architectural interest, special values and some other characteristics with interest to preserve, which contribute to keeping the building originality and singularity. These building could be retrofitted for new facilities of uses increasing the levels of comfort similar to new buildings. However, all project management of that kind of buildings is more specific, complex and requires special knowledge in the management of the particularities of their work, even other factors related with misunderstandings, inheritance problems, and many others. This research describes a case study that involves the surveying of constraints and other problems concerning the retrofitting works of an old building located in Montesinho village (Bragança-Portugal). In their retrofitting works were applied some parameters of the “Retrofitting management system for buildings located in consolidated urban areas” to support the project design and the building existential particularities. Besides, the management system considers regulations obliged, sustainable practices and possible constraints particularities for that old building case study’s project management. The results show constraints, problems, but also solutions application to solve and reduce them, being a contribution to many other old buildings with similar retrofitting needs.
The effect of stone column area replacement ratio on seismic behaviour of foundation
Authors: Safkan I , Derogar S , Anywar J 
Published: May 2020

Abstract
Tall buildings require additional foundation solutions in order to resist the applied actions on soft soil sites. Nowadays the piled foundations are often altered by stone column solutions, as a cheap alternative. Structures built on soft soil or stiff soil, generally results in different behavior under earthquakes. However, the earthquake behavior of the stone column solution on different types of soil is still unclear. This paper aims to investigate the influence of different characteristics of soil structure interaction on the seismic response of stone column matt foundation. A reinforced concrete matt foundation was simulated with parametric soil stiffness and area replacement ratio of stone column. An analytical method was used to model the soil profile and appropriate ground motion data were incorporated for the analyses. The comparative results were presented and highlighted in terms of soil amplification and seismic response.
Mathematical model of compressor-condenser unit
Authors: Tatarenko I V , Mitropov V V , Nikitin A A 
Published: May 2020

Abstract
The article aims to consider a mathematical model of a compressor-condenser unit, based on the piston compressor with frequency control. The accepted initial data are temperatures and relative humidity of environment and a cooled room, geometrics of the main unit elements. CoolProp library was used for calculation of thermodynamic and thermophysical parameters. The flowchart of calculation of the compressor-condenser unit is provided in the article. The evaluation of the impact of change in environmental relative humidity on the heat transfer coefficient of the condenser has been made.