bluuebunny/crossref_metadata_2025_split huggingface dataset:
The evolution of red color vision is linked to coordinated rhodopsin tuning in lycaenid butterflies
Authors: Liénard Marjorie A. , Bernard Gary D. , Allen Andrew , Lassance Jean-Marc , Song Siliang , Childers Richard Rabideau , Yu Nanfang , Ye Dajia , Stephenson Adriana , Valencia-Montoya Wendy A. , Salzman Shayla , Whitaker Melissa R. L. , Calonje Michael , Zhang Feng , Pierce Naomi E. 
Published: February 2021

SignificanceOpsins are photosensitive receptors capturing specific wavelengths of incoming light to convey color vision across animals. Lack of reliable expression systems to study invertebrate Gqopsins has limited our ability to tease apart genotype–phenotype relationships underlying spectral tuning and visual adaptations in insects compared to homologous yet phylogenetically distant vertebrate Gtopsin lineages. We developed a robust method to express invertebrate opsin proteins in vitro, which we apply to study the visual system of a lycaenid butterfly. Our detailed molecular characterization of red-shifted long-wavelength and duplicate short-wavelength Gqinsect opsins, together with a broad mutagenesis approach for exploring invertebrate opsin sequence-visual pigment functions, begins pinpointing the proximate evolutionary mechanisms underlying the diversification of color vision systems across animal life.
Determination of retrorsine in orange peel by Ultra-high-performance liquid chromatography tandem mass
Authors: Chen Wuhai , Zeng Shaodong , Jia Ning , Liu Zuhong , Qi Ningli , Pan Xiaowei , Ye Jianzhi 
Published: February 2021

Abstract
A method for the determination of retrorsine in orange peel by ultra performance liquid chromatography tandem mass spectrometry (LC-MS/MS) was established. The acetonitrile (containing 0.1% formic acid) was extracted, ionized by electrospray ionization with positive ion mode and determined by multi-reaction monitoring mode. The results showed a good linearity in the range of 0.2-2.0 ng/mL, and the correlation Coefficient R2 was 0.998453. The average recoveries of the three additive levels were more than 70% and the RSD was 0.19%-1.57%. The method was sensitive and rapid, and could be used for the determination of retrorsine in orange peel by ultra performance liquid chromatography tandem mass spectrometry.
Flue Gas Treatment of Desulphurization Wastewater
Authors: Liu Xiaoyu , Yang Bing , Li RuoZheng 
Published: February 2021

Abstract
Desulfurization wastewater from thermal power plants has high salinity, strong corrosiveness and great harm to the environment, which is the key and difficult point to realize zero discharge of wastewater. The conventional evaporative crystallization process is complicated with many equipments and high investment cost and operation cost. Based on the problems of the traditional evaporation crystallization process, the field of zero discharge of desulphurization wastewater is more inclined to flue gas treatment. In this paper, the flue gas evaporation technology is introduced and analyzed, and various processes and combinations are analyzed and compared, as well as the cost comparison. Finally, it is confirmed that spray drying evaporation technology has the most market potential.
Study on Luminescent Properties of Sr2MgTeO6:Tm3+ Blue-Emitting Phosphors
Authors: Deng Bin , Yang Junhui , Liu Jinhua , Chen Jun , Zeng Fanhua , Wang Huanyou 
Published: February 2021

Abstract
A series of solid solution blue-emitting tellurate Sr2MgTeO6:Tm3+ phosphors were prepared at 1100 °C by the high-temperature solid-phase method. The single phase of Sr2MgTeO6:xTm3+ (x = 0.0025-0.10 mol) were checked by powder X-ray powder diffraction. Under 359 nm excitation, the Sr2MgTeO6:Tm3+ phosphors emit blue emission at 456 nm. The optimum doping concentration was 0.05 mol. The fluorescent decay lifetime of Sr2MgTeO6:0.05Tm3+phosphor is 0.318 ms. These results validated the Sr2MgTeO6:Tm3+ tellurate phosphor showed the great potential in the field of solid lighting as blue-emitting substitutes.
The Research of NOMA-MEC Network based on Untrusted Relay-Assisted Transmission in Power Internet of Things
Authors: Li Da , Li Bo , Qin Ningli , Jing Xiaosong , Du Changyu , Wan Chunyi 
Published: February 2021

Abstract
Mobile edge computing provides a promising architecture for the computing of power Internet of Things terminal equipment, which can effectively solve the problems of insufficient computing power and energy-limitation of terminal equipment. In addition, relay-assisted transmission is adopted because the equipment may be far away from the MEC server. However, relay may be attacked by malicious users and become untrusted relay. Therefore, destination-assisted jamming is proposed to improve the security performance of offload computing. In order to improve spectrum utilization, non-orthogonal multiple access technology is used to transmission. An alternate iterative algorithm is proposed to jointly optimize the power allocation and offloading time to maximize security energy efficiency. The simulation results verify the effectiveness of the proposed method.
Structured UH model considering induced anisotropy
Authors: Zhu Enyang , Wang Shaokun 
Published: February 2021

Abstract
Based on the structured unified hardening model (structured UH model), introducing rotational hardening, a structured UH model considering induced anisotropy is presented. Applying the transformed method, the presented model is extended in three-dimensional stress space. Comparing the test data with the model simulations, the structured UH model considering induced anisotropy is qualified to smoothly and continuously describe the behaviors of natural soils in cyclic loading.
Study on Power System Planning Modes under Market Environment at Home and Abroad
Authors: Li Nan , Zhang Fuqiang , Feng Junshu 
Published: February 2021

Abstract
Electricity market reform has long been a global development trend, and has achieved good benefits in European and American countries due to their earlier marketization driven by the economic development. By studying the typical power system planning process of foreign countries with mature electricity markets, this paper figures out the general mode of power system planning under the market environment: The power source planning is decided by the generators who shall assume sole responsibility for own profits or losses, and the power network planning is generally made by market regulators or regional transmission organizations.
Energy-saving-orientated ventilation optimization under safely feasible water-gas compartment in urban utility tunnels
Authors: Zhang Shuhao , Lv Shan , Huang Xiaomei , Peng Shini , Du Jianmei , Zhao Wei 
Published: February 2021

Abstract
Building an independent gas compartment in utility tunnel will require spending additional costs for construction, which is often hindered by the public budget limitations. To lay gas pipelines together with water pipelines compartment in utility tunnel was proposed, forming a water-gas compartment. Persistent ventilation consumes too much energy to cope with small possibility accident. Hence, the diffusion law of potential gas leakage and effect of the present combustible gas detection, alarming and ventilation systems were examined by a numerical simulation using the software Fluent based on computational fluid dynamics (CFD). The volume fraction of leaking methane accumulation law without ventilation were obtained. The results revealed that the present emergency measures for a single gas pipe compartment can be safely applied to the proposed water-gas compartment to guarantee the safety, which provides novel insights into and an important basis for the improvement of the related urban engineering design and relevant standards. Optimization scheme of ventilation was proposed and energy saved was calculated quantitatively.
The spatial distribution characteristics of the centrality advantage stations in Hangzhou metro planning (2005-2022)
Authors: Wu Fang , Zhu Yue , Zhu Wei , Wang Kaiqiang , Shen Peng , Wang Xin 
Published: February 2021

Abstract
The identification of the metro’s centrality advantage stations and regions is of great significance for in-depth understanding of the centrality layout of existing urban areas. This study selects all stations of the Hangzhou Metro Planning (2005-2022) as research cases. Based on the centrality of the complex network, it will study the spatial distribution characteristics of centrality advantage stations. The study found that: subway stations at each stage can be classified into four types of centrality advantages, and there are significant differences between these types, with a significance of 0.000; at the same time, the Type 1 and Type 2 of stations establish the core framework of the centrality advantages area; the gathering hot spot roughly establishes the range of the centrality advantage area distribution, which defines the boundary of the high advantage area. The transportation network advantage of the centrality advantage stations will be transformed into the TOD development advantage and potential of its surrounding area.
Experimental study on compressive strength and durability of steel slag cement non-burned and non-steamed brick
Authors: Cui Biying , Gao Bingcong , Li Qiang , Kang Hongzhen 
Published: February 2021

Abstract
Non-burned and non-steamed brick is made of steel slag, cement, additives and water mixing extrusion, The mix ratio is cement:stone powder: steel slag =l:2.7:13.5. This experiment studies three different sizes of steel slag cement non-burned and non-steamed brick. The researches show that: The density of steel slag cement non-burned and non-steamed brick is larger than that of ordinary brick; The strength and frost resistance of 240mm × 110mm × 50mm non-burned and non-steamed brick all meet the relevant requirements of MU15.0 in JC/T422-2007Non-fired rubbish gangue brick. The non-burned and non-steamed brick strength of 200mm × 100mm × 50mm and 200mm × 100mm × 60mm conforms to the relevant requirements of MU25.0 in JC/T422-2007 Non-fired rubbish gangue brick. After 15 freeze-thaw cycles, the mass loss rate is within 1%, but the strength loss rate is as high as 44%.
Lightweight display of bridge model based on WebGL Technology
Authors: Rong Xuewen , Zhang Zhiju , Fang Xiaoming , Dang Tao 
Published: February 2021

Abstract
For the inconvenience of BIM model display, remote browsing and remote interaction of bridge engineering, this paper achieves lightweight display, information browsing and user interaction of the BIM model Web page of Shichuan River Bridge based on BIMFACE secondary development platform. The lightweight display of bridge BIM model is realized by creating three-dimensional model, model format conversion, loading display model, calling function to achieve interaction function, etc. The result shows that this method can well realize lightweight display and interactive function of three-dimensional model Web page. Model lightweight display improves BIM model utilization efficiency and facilitates project management by project participants. In addition, it can be further developed for collaborative management and virtual reality of bridge projects.
Equivalent plane strain model of stone column reinforced foundation
Authors: Li Hongyuan 
Published: February 2021

Abstract
Stone column replacement of soft soil foundation construction method is more and more used in water conservancy projects. On the one hand, the stone column has high permeability, which enhances the dissipation capacity of excess pore water pressure; on the other hand, it has a high stiffness, which reduces the additional stress in the soil, and therefore reduces the excess pore water pressure. These two mechanisms work together to improve the bearing capacity of soil. In the previous plane strain transformation model of column-soil, only the high permeability of stone column is simply considered, while the stiffness of stone column is ignored. According to the previous research results, and based on the principle of genetic algorithm, this paper puts forward two conversion models which only consider the permeability of stone column and one conversion model which considers two kinds of action mechanism of gravel pile at the same time. The results of finite element calculation show that the transformation method considering the two mechanisms of stone columns are more consistent with the axisymmetric model.
Effect of cryogenic treatment of cemented tungsten carbide tools for die application
Authors: Yooliengpun C , Bandasak N , Tuchinda K , Diewwanit O 
Published: February 2021

Abstract
This study investigated effects of cryogenic treatment and post tempering on microstructure parameters and mechanical properties of cemented tungsten carbide for die applications. Carbide grain size was increased after the cryogenic treatment resulted in an increased carbide contiguity. After tempering process, tungsten carbide grain size was reduced and more uniform in size distribution with less in WC-Co debonding. The fracture toughness of cryogenically treated carbide which evaluated from microstructure parameter was slightly increased from 20 to 21.1 MPa · m1/2. After tempering, the fracture toughness was almost unchanged compared to that of untreated sample and the number of tempering cycles did not affect the fracture toughness. However, hardness and scratch resistance were improved 10% and 60%, respectively, by cryogenic treatment. Increasing the number of post tempering cycles after applying the cryogenic treatment result in reducing hardness but did not affected the scratch resistance of the cemented tungsten carbide. In addition, results of ball on disc tribological testing indicated that wear resistance of the cemented tungsten carbide could be improved by cryogenic treatment due to the higher hardness and scratch resistance as expected. The wear volume was increased with the number of tempering cycles. Therefore, sliding wear resistance and scratch resistance applications in which material surface failure behaviour is mainly controlled by surface hardness, post tempering process might not be required.
Determination of damping ratio using Monte-Carlo method
Authors: Peng Q , Ding Y , Huang Y , Zhu Z 
Published: February 2021

Abstract
This paper highlights an innovant method for calculating the damping ratio using Monte-Carlo method. Compared with other approaches reported in the literature, the clear benefit of the method is the ability to directly determinate the damping ratio upon irregular stress-stain curves through Python. By using Monte-Carlo method, it is found that (i) the computed damping ratios are consistent with the undrained cyclic triaxial result on a dense reference sand specimen; (ii) while total random samplings number for each hysteresis loop greater than 5000 times, the method could provide a satisfactory analysis.
Experimental measurements through ultrasounds for viscoelasticity analysis
Authors: Maiorano A , Napolitano Dell’Annunziata G , Rocca E 
Published: February 2021

Abstract
Among the different methodologies useful to determinate polymers viscoelastic properties in literature, it is possible to find some different techniques based on the ultrasounds pulse-echo methods which show several limits in the properties estimation of the tested materials. In this scenario, the proposed manuscript focuses on an innovative non-destructive technique of viscoelastic materials by means of ultrasounds, which could be suitably employed on polymers. The developed procedure is aimed to evaluate the material response in terms of loss factor within different temperatures and induced excitation frequencies. To carry out the viscoelasticity analysis through ultrasounds, a bench has been set up and the data acquisition has been performed by means of the pulse-echo method on three different tires tread specimens and, then, a post-process algorithm has been implemented in order to determine the viscoelastic behavior in terms of loss factor. The comparison of the achieved results with the temperature sweep master curves, which were determined by means of standard Dynamic Mechanical Analysis (D.M.A.) testing on the same polymers, has provided an indication of the goodness of the proposed procedure.
Stability analysis of intrinsic camera calibration using probability distributions
Authors: Zhan Kun , Fritsch Dieter , Wagner Joerg F 
Published: February 2021

Abstract
The currently most widely used calibration method in geometric computer vision is based on Zhang’s method. This approach is easy to implement and delivers detailed result evaluations. One drawback, however, might be that the unexperienced user may obtain unstable and unrepeatable calibration results despite small re-projection errors. Therefore, the data must be interpreted with caution and there is definitely a need for further consideration beside re-projections to be taken for better estimations. So far, statistical inference has been used for presenting precision measures only. In our work, we extend the statistical approach quantitatively using large bundles of images and get calibrations from randomly chosen subsets. Then a Maximum Likelihood Estimation of intrinsic parameters is implemented and the statistical behaviour is analyzed. In addition, the recovered expected values of parameters are utilized as ground truth to scrutinize the single influencing factors of the imaging configuration. According to the results we found out that the image block plays a significant role for camera calibration with regard to the orientation of the imaging configuration. Including also suitable manufactured calibration boards as well as other operational issues, finally a well-designed image block provides a repeatable and reliable calibration.
Edible film coating to extend the shelf-life of fresh-cut kiwi
Authors: Gullifa G. 
Published: February 2021

Abstract
In this work, a novel coating strategy able to prolonge the shelf-life of fresh-cut kiwi is proposed and the effectiveness of the procedure was evaluated over a period of 15 days in order to propose innovative minimally processed fruits as ready-to-eat. Chitosan and carboxymethyl cellulose were compared as coating material while a number of pretreatments were tested in order to assess the most performing strategy leading to the most stable product. The complete characterization of the Volatile Organic Compounds (VOCs) was achieved by Solide Phase Micro Extraction associated to gaschromatography and mass spectrometry (SPME-GC/MS) and correlated to the weight losses occurring with the increase of aging. The obtained results suggested that the involvement of carboxymethyl cellulose and ascorbic acid on pretreated fresh-cut kiwi, permitted to extend the shelf-life of the fruit until 15 days during storage at 4°C.
Seismic performance of reinforced concrete tall buildings with conventional and non-conventional construction systems
Authors: Arita L , Lezameta R , Huaco G , Garber D 
Published: February 2021

Abstract
Currently in the city of Lima there is a limited number of high-rise buildings. Therefore, there is not much literature on this type of building in Peru. Peruvian codes focus on medium and low-rise buildings. For this reason, studies are required to analyze and design these tall buildings more appropriately according to the reality of the country. In this article, a pushover modal analysis of 6 types of 35-Story reinforced concrete buildings in the city of Lima will be developed. Three building models with different structural systems and square and rectangular plan are proposed, being the areas of 29m × 29m and 52m × 26m respectively. These structural systems are rigid core and frames with an energy dissipation system (fluid viscous dampers and shear-link-bozzo dissipators SLB) in order to study their behavior against seismic stresses. These buildings were based on the criteria and requirements of the current codes in the country as well as the distribution of the floor plan of buildings commonly used for offices and homes. Natural periods (T) were found to range from 2.6 to 3.3 seconds for rigid core buildings. There is an increase for viscous damping buildings from 4.2 to 5.4 seconds and also for SLB devices to range from 3.7 to 4.6 seconds. In turn, modal static nonlinear analysis was performed to obtain the capacity curves for each type of building, which were compared with the seismic demands according to the design provisions of the Peruvian seismic standard E.030 and an average of design spectra. of acceleration records of severe seismic events in Peru and scaled in a range of 0.2T to 1.5T. The performance points for each building case were determined following the ATC-40 methodologies, finding that tall buildings with a rigid core have approximately twice the stiffness of buildings with SLB dampers, as well as low ductility, unlike buildings with dissipators, that have a high ductility.
The dissolution of hematite deposits on model spent ion exchange resins using direct current
Authors: Tokar E A , Matskevich A I , Sokolnitskaya T A , Egorin A M 
Published: February 2021

Abstract
The method of dissolving hematite deposits intensification, containing cobalt radionuclides, on ion exchangers KU 2-8, modelling spent ion exchange resin, was proposed. Defined, that with direct current increasing and with acids concentration increasing, the efficiency of hematite deposits dissolution is increasing and could exceed 99%. The hematite dissolution accompanied by radionuclides secondary adsorption due to ion exchange that could be removed with sodium nitrate solution was presented.
Optimization of structural elements in highly seismic areas using neural networks
Authors: Arana V. , Sanchez M. , Vidal P. 
Published: February 2021

Abstract
The aim of this research is to use Artificial Neural Networks (ANN) to dimension structural elements in regular 6-storey buildings. The necessary data for the training of the algorithm was elaborated manually with the help of the ETABS software, these were 30 buildings of reinforced concrete with a system of structural walls. The configuration and training of the neural network was carried out in the MATLAB software. The validation was carried out in an additional analyzed building in which the concrete savings were calculated, and the requirements of the current regulations were verified. Finally, the dimensioning obtained with the neural network generated a reduction of more than 10% in the total volume of concrete used in a 6-level building and establishes that the algorithm used provides effective results for an optimal design.
Evaluation of the Influence of Different Grades of Reinforcing Steel on the Seismic Performance of Concrete reinforced Frame Structures with Nonlinear Static Analysis
Authors: Navarro D , Valero R , Orihuela J 
Published: February 2021

Abstract
In this investigation, the elasto-plastic behavior and the seismic performance of concrete reinforced frame structures reinforced are evaluated by applying the Pushover method. This evaluation is done on several cases: with high ductility steel (Grade 40), conventional steel (Grade 60) and high strength steel (Grade 75). For the previous, the capacity curve graph obtained from the displacement coefficient method was used to measure the capacity of the structure. In addition, the performance of the structure for different levels of seismic design are evaluated with the resulting values of ductility and rigidity of each case. The results showed that reinforcing a structure with a Grade 40 reinforcing steel increases the energy dissipation capacity, and if reinforced with a Grade 75 reinforcing steel increases the strength capacity in the structure. Finally, the comparative result of the various cases are presented to demonstrate the influence of reinforcing steel on the plastic behavior of concrete reinforced frame structures.