bluuebunny/crossref_metadata_2025_split huggingface dataset:
Collaborative Optimization for Location-Inventory Problem of Commercial Vehicle Distribution Network
Authors: Peng Wanying , Qin Lu 
Published: February 2021

Abstract
This paper studies a bi-level programming model addressing the location-inventory problem which can determine the location of distribution centers and the inventory strategy of distribution centers and stores at the same time. In the location-inventory joint decision model, the order quantity is a continuous decision variable associating the upper and lower models and the remaining decision variables are 0-1 variables. In this paper, a branch and bound method is proposed and the SCIP solver is used to solve the bi-level mixed integer non-linear programming problem. The results show that collaborative optimization can save more costs than the one-by- one optimization method and that the optimal solution has better stability under the condition of demand fluctuation and satisfies the optimal allocation of important customers.
Study on color pavement layout of expressway service area
Authors: Jin Fei 
Published: February 2021

Abstract
In order to solve the existing problems of highway service area color pavement layout. According to the demand and characteristics of expressway service area, this paper analyzes the psychological effect of color, and puts forward the functional demand of color pavement in service area. The layout principle and method of color pavement in service area are expounded. The results can provide reference for the color pavement design of expressway service area.
Passenger Flow Control Method for Network-Wide Operation of Urban Rail Transit System: a case study in Guangzhou
Authors: Zhang Zhe , Huang Zhaohong 
Published: February 2021

AbstractA passenger flow control method for network-wide operation of urban rail transit system is proposed in this paper. In order to find a better trade-off between the delayed time and the increasing number of controlled passengers, the objective function of passenger flow control is formulated based on the problem description. The constraints about the passenger behaviour and capacity limitation are described and the model is formulated successfully. Finally, the proposed method is applied to control the passenger flow of GuangZhou Metro Line 1. The comparison results show that the proposed control model can be used to produce the optimal control plan.
Signal Coordination Control Based on Comprehensive Correlation Degree
Authors: Wen Ling , Dong Baotian , Li Pengcheng , Yan An 
Published: February 2021

Abstract
The correlation degree between nodes of urban traffic network is the basis of sub-area division, and the signal coordination control in sub-area is very effective to improve the traffic efficiency of road network. In this paper, based on the study of unsaturated traffic state, the paper first analyzes the shortcomings of the existing correlation degree model, and constructs a comprehensive correlation degree model to measure the relationship between the two nodes by considering the factors of section spacing, section flow, signal period, traffic flow dispersion and queue length. Through VISSIM simulation experiment, the examples of 15 sections of 10 nodes are compared with the classical Whitson model and the merging index. The sub-region based on the DBSCAN algorithm is more close to reality, which can provide a good basis for the signal coordination strategy.
Research on Ship Route Planning Method Based on Neural Network Wave Data Forecast
Authors: Jin Xin , Xiong Junting , Gu Dongliang , Yi Chengtao , Jiang Yongxin 
Published: February 2021

Abstract
Route design is an indispensable skill for ships and navigators. However, in actual work, most of the current route design still lies in manually reading port information and other graphic materials, and then revising the sailing plan in conjunction with the weather forecast. On the one hand, this method is not accurate enough, and the graphics and text data are not sufficiently real-time. On the other hand, this method has the disadvantages of being cumbersome and labor-intensive. In response to the above problems, this article combines the actual data set of ICOAD, applies the neural network model, and uses the A* algorithm to plan the route, which provides a reference for the application of artificial intelligence to ship route planning.
The Impacts of Warning Release Time and Speed Limit on Driving Behaviour and Pedestrian-Vehicle Collision Rate on Side-parking Road
Authors: Miao Yiming , Yan Xuedong 
Published: February 2021

Abstract
As we all know, pedestrian-vehicle collisions would cause serious damage to us, especially those caused by blind spots. This study focused on collisions happen in the side- parking road, using a driving simulator to design scenarios. After finishing the experiment, we selected some variables to describe the driver’s driving behaviour, including brake reaction time, warning-to-brake time, and maximum deceleration. To verify the effectiveness of the audio warning system, the collision rate was also discussed. It was found that warning release time has significant effects with all the variables, and gender has significant effects with brake reaction time and warning-to-brake time, while the speed limit only influences maximum deceleration. Collision rate was affected by speed limit and warning release time, which decreased with the increase of speed limit and the late release of warning. It is recommended to set the warning release time to 4s before the collision. On the other hand, it is necessary to select a proper speed limit on the side-parking roads, and it is better to set it under 30km/h to reduce the probability of pedestrian-vehicle collision.
Online Car-hailing Service Quality Evaluation Based on BP Neural Network
Authors: Wang Mingzhi , Wu Xianyu 
Published: February 2021

Abstract
In order to reduce the subjectivity and make sure the online car-hailing evaluation results more authentic and credible, an evaluation index system is constructed from five dimensions of the safety, cost, time, reliability and empathetic, and then a BP neural network model is proposed to solve it. Through the supervised model training of SP survey data, the maximum error between the network output and the actual results no more than 3.68%, which can meet the requirements of online car-hailing service quality evaluation. Finally, a mathematical statistical analysis method is proposed to comprehensive evaluate the online car-hailing service quality. The results show that the evaluation index system is scientific and reasonable, and the model can effectively improve the objectively of the evaluation results and reflect the quality level of online car-hailing service.
Research on the Application of PPP + EPC Mode in Financing of Intercity Railway Projects
Authors: Renxu  , Li Yaping 
Published: February 2021

Abstract
Through the analysis of the current situation of intercity railway project financing, this paper concludes that the demand of funds for intercity railway construction is huge, and it is still mainly debt financing, which leads to the huge financial pressure of local government. In order to alleviate the financial pressure and realize the real equity financing of intercity railway projects, this paper proposes to use “PPP + EPC“ mode to finance. On the one hand, this mode can optimize the whole process management of the project; on the other hand, it can optimize the risk management and control in the project cooperation period, meet the risk return requirements of stakeholders, and promote the sustainable development of intercity railway projects.
Research on seismic fragility analysis of regular bridges based on response spectrum analysis method
Authors: Yi Hangyu , Zhang Shengjie , Zhao Fan , Min Guangyun 
Published: February 2021

Abstract
In this paper, the incremental dynamic analysis (IDA) of a real bridge is carried out by using the nonlinear time-history analysis method and the response spectrum analysis method respectively, and the results of structural response under different earthquake intensity are obtained. Ductility coefficient is used for damage index, and the damage probability of the structure in different damage state is obtained by using logarithmic demand-capacity ratio, and then the seismic fragility curves of the structure are established. To improve the precision of fragility curve of major damage state and failure state by modifying the fitting function is also studied. The results show that the simple linear elastic method is reliable for calculating the seismic response of regular bridges. The seismic response calculated by the response spectrum analysis method could be used as the demand for establishing the fragility curves of regular bridge.
Seismic Response Analysis of Cable-stayed Bridges with Cable Forces Optimized Parameters based on a New Type of Strongly Sub-feasible SQP Method
Authors: Yin Xun-qiang , Zhao Wen-yan , Qiu Xiao-tong , Wang Gui-xuan 
Published: February 2021

Abstract
A new type of strongly sub-feasible SQP (Strong Quadratic Programming) method is used to establish a nonlinear model to realize the automatic search of the rational cable force of the cable-stayed bridge. The objective function is established based on the stress and displacement of the main girder and the bridge tower. The cable force of the stay cable is the design variable, the stress and displacement of the main girder and the bridge tower are the constraints, and the numerical model of the earthquake force is analyzed under different cable loading conditions. The results show that the new type of strongly sub-feasible SQP method is suitable for the complicated cable force optimized parameters of large-scale cable-stayed bridges, the calculated results are in good agreement with the designed cable force, and the bending moment of the main beam in the bridge state is uniform. The main tower is close to the axial compression force, and structural deformation is much smaller than the specification limits. Under the excitation of earthquake, the optimized cable force can effectively improve the uneven distribution of bending moment of the main beam, limit the longitudinal mid-span deformation and the lateral deformation of the main tower, so that the whole structure is safer in the earthquake.
Study on the mechanical properties and application prospects of the traditional and modern connection of wood structure
Authors: Li Lidan , Zhou Jianying 
Published: February 2021

Abstract
Based on the connection status of traditional wood structure nodes in southeast Guizhou, this paper analyzes the structural performance of traditional and modern connection methods of wood structure buildings, and analyzes the mechanical performance and deformation mechanism of the structure through basic traditional wood structure mechanical tests; Analyze the advantages and disadvantages of different connection methods, summarize the improvement ideas of node connection of residential wood structure buildings; compare traditional and modern wood structure systems, analyze the seismic performance of the structure; provide a reasonable reference for wood structure design. Further realize the industrialization and standardization of regional wood structures.
Research on Mechanical Properties and Microstructures of Composite Wall Panels Made of High-Performance Fiber Reinforced Cement-based Composites
Authors: Cheng Baojun , Kang Shengrong , Ma Pengfei , Yang Wen , Shi Boyuan 
Published: February 2021

Abstract
A new-type composite wall panel was designed using the high-performance fiber reinforced cement-based composite and foam concrete, and then their mechanical properties, phase composition and microstructure were investigated. The results show that the composite wall panel is of superior overall mechanical properties, which are ascribed to the high-performance fiber reinforced cement-based composite, where the longitudinal compressive strength, the main phase compositions of the high-performance fiber reinforced cement-based composite are CaCO3, Ca (OH)2, ettringite and C-S-H.
Creep behavior of steel bonded reinforced concrete members under small eccentric compression
Authors: Cao Jian , Pan Xinpeng , Zeng Lingyun , Zeng Jingqi 
Published: February 2021

Abstract
In this paper, the creep behavior of steel bonded reinforced concrete members under small eccentric compression is studied. Firstly, based on the existing mechanical characteristics of concrete under multi axial stress state, the stress-strain relationship of steel bonded small eccentric concrete is theoretically deduced and analyzed by considering the reduction coefficient of hoop force. Secondly, according to the creep characteristics of confined core concrete, combined with the existing concrete creep model and the analysis of its influencing factors, the influence of sticking steel on the creep of small eccentric reinforced concrete compression members is discussed. The corresponding creep calculation formula is established. Finally, the existing experimental data are used to verify the proposed formula, and its applicability is analyzed.
Review of soft rock weathered material for subgrade filling
Authors: De-yong Wang , Jun-long Hu , Jing Wang , Shang-hui Gao 
Published: February 2021

Abstract
With the continuous construction and development of Chinese infrastructure, more and higher requirements are imposed on the construction of expressway engineering. The construction of mountainous expressway has been gradually transformed from winding mountain to bridging and digging tunnels. Various forms of subgrade such as high filling and deep cutting, half filling and half cutting are unavoidable. The huge demand for roadbed filling and the inconvenience of transportation conditions have caused extreme costs for external materials. On the other hand, tunnel excavation brings a large amount of soft rock abandoned slag. If soft rock abandoned slag can be used for subgrade filling, it will not only help avoid resource waste, but also help reduce environmental damage. This paper introduces progress of researches at home and abroad on engineering properties, particle composition and distribution characteristics, CBR, compaction characteristics, etc. of soft rock, as well as the evaluation criteria and applicability of soft rock as subgrade filler in detail.
The effects of the post-annealing with a Zn cap on the structural and electrical properties of sol-gel derived MgxZn1−xO films
Authors: Abe Koji , Morimoto Yasuhiro 
Published: February 2021

Abstract
Structural and electrical properties of Al-doped MgxZn1−xO films were improved by post-annealing with supplying Zn vapor. The Al-doped MgxZn1−xO films were deposited on glass substrates by a sol-gel method. The substrates were dip-coated with a precursor solution and were dried on a hotplate at 270 °C for 10 min. This dip-coating and drying process was repeated 10 times, and the Al-doped MgxZn1−xO films were obtained after calcination in air at 500 °C for 1 h. The as-grown films were post-annealed in H2 at 400 °C for 20 min. To supply zinc vapor, a glass slide with a thermally evaporated Zn layer (Zn cap) was put on the sample surface during the post-annealing. The as-grown films had the wurtzite structure with the c-axis perpendicular to the substrate surface, but the intensity of the (002) diffraction peak decreased with increasing Mg content (x). The crystallinity of the films was improved after the post-annealing with a Zn cap, which was observed when x was below 0.1. The resistivity and carrier concentration of the film (x = 0.1) after the post-annealing with a Zn cap was 6.0 × 10−3 Ωcm and 5.7 × 1019 cm−3, respectively. On the other hand, the resistivity of the film (x = 0.1) after the post-annealing without a Zn cap was 6.6 × 102 Ωcm. Transmittance spectra in the visible range were not affected by the post-annealing. The optical bandgap of the film (x = 0.1) after the post-annealing with a Zn cap was 3.41 eV.
Reducing bias and increasing surgical knowledge: multicentre prospective breast cancer studies
Authors: Sund M 
Published: February 2021

Abstract
In the March issue of BJS several hot topics within the breast surgery field are highlighted in beautifully planned and executed prospective multicentre trials. BJS encourages the surgical communities in most fields to move towards prospective collaborative and multicentre studies, thereby increasing both power and generalizability as well as reducing the risk of bias.
Identification of Caenorhabditis elegans Genes Required for Neuronal Differentiation and Migration
Authors: Forrester Wayne C , Perens Elliot , Zallen Jennifer A , Garriga Gian 
Published: February 2021

Abstract
To understand the mechanisms that guide migrating cells, we have been studying the embryonic migrations of the C. elegans canal-associated neurons (CANs). Here, we describe two screens used to identify genes involved in CAN migration. First, we screened for mutants that died as clear larvae (Clr) or had withered tails (Wit), phenotypes displayed by animals lacking normal CAN function. Second, we screened directly for mutants with missing or misplaced CANs. We isolated and characterized 30 mutants that defined 14 genes necessary for CAN migration. We found that one of the genes, ceh-10, specifies CAN fate. ceh-10 had been defined molecularly as encoding a homeodomain protein expressed in the CANs. Mutations that reduce ceh-10 function result in Wit animals with CANs that are partially defective in their migrations. Mutations that eliminate ceh-10 function result in Clr animals with CANs that fail to migrate or express CEH-23, a CAN differentiation marker. Null mutants also fail to express CEH-10, suggesting that CEH-10 regulates its own expression. Finally, we found that ceh-10 is necessary for the differentiation of AIY and RMED, two additional cells that express CEH-10.
An Extensive 3′ Regulatory Region Controls Expression of Bmp5 in Specific Anatomical Structures of the Mouse Embryo
Authors: DiLeone Ralph J , Russell Liane B , Kingsley David M 
Published: February 2021

Abstract
Bone morphogenetic proteins (BMPs) are secreted signaling molecules that control important developmental events in many different organisms. Previous studies have shown that BMPs are expressed at the earliest stages of skeletal development, and are required for formation of specific skeletal features, strongly suggesting that they are endogenous signals used to control formation of skeletal tissue. Despite the importance of BMP signaling in normal development, very little is known about the mechanisms that control the synthesis and distribution of BMP signals in vertebrates. Here, we identify a large array of cis-acting control sequences that lay out expression of the mouse Bmp5 gene in specific skeletal structures and soft tissues. Some of these elements show striking specificity for particular anatomical features within the skeleton, rather than for cartilage and bone in general. These data suggest that the vertebrate skeleton is built from the sum of many independent domains of BMP expression, each of which may be controlled by separate regulatory elements driving expression at specific anatomical locations. Surprisingly, some of the regulatory sequences in the Bmp5 gene map over 270 kb from the Bmp5 promoter, making them among the most distant elements yet identified in studies of eukaryotic gene expression.
Isolation of a Schizosaccharomyces pombe rad21ts Mutant That Is Aberrant in Chromosome Segregation, Microtubule Function, DNA Repair and Sensitive to Hydroxyurea: Possible Involvement of Rad21 in Ubiquitin-Mediated Proteolysis
Authors: Tatebayashi Kazuo , Kato Jun-ichi , Ikeda Hideo 
Published: February 2021

Abstract
The fission yeast DNA repair gene rad21+ is essential for cell growth. To investigate the function essential for cell proliferation, we have isolated a temperature-sensitive mutant of the rad21+ gene. The mutant, rad21-K1, showed abnormal mitosis at the nonpermissive temperature. Some cells contained abnormal nuclear structures, such as condensed chromosomes with short spindles, or chromosomes stretched or unequally separated by elongating spindles. Other cells exhibited the displaced nucleus or a cut-like phenotype. Similar abnormalities were observed when the Rad21 protein was depleted from cells. We therefore concluded that Rad21 is essential for proper segregation of chromosomes. Moreover, the rad21-K1 mutant is sensitive not only to UV and γ-ray irradiation but to thiabendazole and hydroxyurea, indicating that Rad21 plays important roles in microtubule function, DNA repair, and S phase function. The relation to the microtubule function was further confirmed by the fact that rad21+ genetically interacts with tubulin genes, nda2+ and nda3+. Finally, the growth of the rad21-K1 mutant was inhibited at the permissive temperature by introduction of another mutation in the cut9+ gene, coding for a component of the 20S cyclosome/anaphase promoting complex, which is involved in ubiquitin-mediated proteolysis. The results suggest that these diverse functions of Rad21 may be facilitated through ubiquitin-mediated proteolysis.
A Genetic Linkage Map of a Cichlid Fish, the Tilapia (Oreochromis niloticus)
Authors: Kocher Thomas D , Lee Woo-Jai , Sobolewska Halina , Penman David , McAndrew Brendan 
Published: February 2021

Abstract
We have constructed a genetic map for a tilapia, Oreochromis niloticus, using DNA markers. The segregation of 62 microsatellite and 112 anonymous fragment length polymorphisms (AFLPs) was studied in 41 haploid embryos derived from a single female. We have identified linkages among 162 (93.1%) of these markers. 95% of the microsatellites and 92% of the AFLPs were linked in the final map. The map spans 704 Kosambi cM in 30 linkage groups covering the 22 chromosomes of this species. Twenty-four of these linkage groups contain at least one microsatellite polymorphism. From the number of markers 15 or fewer cM apart, we estimate a total map length of ~1000–1200 cM. High levels of interference are observed, consistent with measurements in other fish species. This map is a starting point for the mapping of single loci and quantitative traits in cichlid fishes.
Biased Short Tract Repair of Palindromic Loop Mismatches in Mammalian Cells
Authors: Taghian Danielle G , Hough Heather , Nickoloff Jac A 
Published: February 2021

Abstract
Mismatch repair of palindromic loops in the presence or absence of single-base mismatches was investigated in wild-type and mismatch-binding defective mutant Chinese hamster ovary cells. Recombination intermediates with a maximum heteroduplex DNA (hDNA) region of 697 bp contained a centrally located, phenotypically silent 12-base palindromic loop mismatch, and/or five single-base mismatches. In wild-type cells, both loops and single-base mismatches were efficiently repaired (80–100%). When no other mismatches were present in hDNA, loops were retained with a 1.6–1.9:1 bias. However, this bias was eliminated when single-base mismatches were present, perhaps because single-base mismatches signal nick-directed repair. In the multiple marker crosses, most repair tracts were long and continuous, with preferential loss of markers in cis to proximal nicks, consistent with nicks directing most repair in this situation. However, ~25% of repair tracts were discontinuous as a result of loop-specific repair, or from segregation or short tract repair of single-base mismatches. In mutant cells, single-base mismatches were repaired less frequently, but the loop was still repaired efficiently and with bias toward loop retention, indicating that the defect in these cells does not affect loop-specific repair. Repair tracts in products from mutant cells showed a wide variety of mosaic patterns reflecting short regions of repair and segregation consistent with reduced nick-directed repair. In mutant cells, single-base mismatches were repaired more efficiently in the presence of the loop than in its absence, a likely consequence of corepair initiated at the loop.