bluuebunny/crossref_metadata_2025_split huggingface dataset:
Numerical analysis of dynamic responses of expanded piles subjected to earthquake loadings
Authors: Liang Zhenyou , Fu Baiyong , Zhang Yiming , Mu Linlong 
Published: June 2021

Abstract
Expanded piles, a novel type of pile system equipped with special mechanical structures, are found with significantly enhanced mechanical performances such as anti-pulling and anti-shearing capacities due to the deformable expanding disks in the middle part. As these structures are generally new, their dynamic responses subjected to earthquake are still unclear. Based on the finite element method, the expanded pile-platform structure is first modelled locally and globally in details. Then, by using the acceleration-time information, the dynamic responses of the expanded pile-platform structure are studied to obtain its deformation properties and envelop diagrams of internal forces, which are compared to the results of normal pile-platform system. The obtained results will assist the designers and engineers to better understand the dynamic responses of the expanded pile-platform structure, thus correspondingly optimizing the reinforcement design and enhancing the dynamic safety of the structures.
The Influence of Human-structure Interaction on Structural Dynamic Properties
Authors: Han Zhifan , Huang Suying 
Published: June 2021

Abstract
For large-span flexible structures, human-structure interaction is obvious, but designers do not have a clear understanding of whether human-structure interaction should be considered in structural design. In this paper, the pedestrian Spring-Mass-Damper (SMD) model and dynamic parameters are used to study the influence of human-structure interaction on structural dynamic properties by using ANSYS finite element calculation software to calculate and compare 70 working conditions. The results show that when the structure-human frequency ratio is less than 1 and slightly greater than 1, the human-structure interaction has a greater influence on the dynamic properties of the structure. As the structure-human frequency ratio increases, the influence of the human-structure interaction on the dynamic properties of the structure decreases. When the structure-human frequency ratio is greater than 2, the human-structure interaction can be ignored.
Numerical Simulation Research on the Influence of Buried Depth on the Stress Field of Overlying Rock in Floor Roadway
Authors: Wang ZHonghua 
Published: June 2021

Abstract
In order to explore the influence of burial depth on the stress field of the overlying rock in the floor roadway, FLAC3D software is used to simulate and analyze when the floor roadway is at 600m, 800m, and 1000m. The stress field distribution characteristics of the rock and surrounding rock within 15m on both sides, the stress field distribution characteristics of different areas directly below and on both sides of the floor roadway are obtained, which provides a theoretical basis for the location selection and support of the floor roadway.
Simulation-based optimization of the control strategy of variable-frequency chilled water pump in data center: A case study in Beijing
Authors: Chong L W , Huang J W , Liu Q , Zhang Z , Chen C , Qi Z , Dai N , Zhang C , Ling J H , Ruan Y , Wang Y X 
Published: June 2021

Abstract
Reducing the energy consumption of air-conditioning system is one of the important means to improve the operation energy efficiency of data center, and the energy consumption of water pump accounts for a relatively high proportion of the energy consumption of air-conditioning system. This paper studied the reduction of operation energy consumption of water pump from the perspective of optimizing its control strategy. Based on the simulation model of the case system, this paper simulated the operation energy consumption of the chilled water pump when two control strategies (the constant DP control and the constant DT control of the main water supply-return pipeline) were used under different load demand. The calculation results show that both two control strategies can reduce the energy consumption of the chilled water pump compared with non-control, and the constant DT control is better. In addition, under two control strategies, the load distribution characteristics of system have an impact on the working state point and energy consumption of the chilled water pump.
Optimization and control strategy of ideal temperature control curve for super-high arch dam
Authors: Liu Youzhi , Liu Chunfeng , Tan Yaosheng , Li Jintao 
Published: June 2021

Abstract
During the construction period, the super-high arch dam is poured monolithically, and the temperature stress level is high. The key to ensure the overall safety of the dam is to do a good job of temperature control and crack prevention during the construction period, and the formulation and optimization of temperature drop curve during the construction period is an important prerequisite for ensuring the temperature control. In addition to the conventional indexes such as the maximum temperature, temperature gradient, cooling range, cooling rate and final combined stress, the transverse joint aperture of the dam should be taken into consideration for the determination of temperature drop curve during dam construction. In this paper, Baihetan super-high arch dam project was taken as an example to study this problem, and the influence of different maximum temperature, target temperature and different cooling process on dam temperature stress, safety factor and transverse joint aperture was systematically analyzed. The results showed that different cooling processes and the setting of stage target temperature have obvious effects on the temperature stress, transverse joint aperture and safety factor during dam construction, and the coupling relation between these factors should be considered comprehensively in formulating the ideal cooling curve, so as to realize the optimization of the overall safety risk of the dam.
Evaluation of Land Use Multifunctionality from the Perspective of “Production-Living-Ecology”
Authors: Ou Zhenli , Liu Yanhua , Liang Jialing , Wang Qianqian , Liao Danchan 
Published: June 2021

Abstract
Based on the entropy TOPSIS model and clustering method, this article builds a multi-functional evaluation index system for land use based on 21 indicators from the perspective of “production-life-ecology”, evaluates the multifunctionality of land use, and analyzes its spatial differences in Baise, Guangxi, China. The results show that the multifunctional level of land use in Baise is still at a poor level, and the ecology function are better utilized. There are big differences in the spatial distribution of multifunctional land use among counties in Baise, and the overall spatial distribution pattern is “slightly stronger in the south than in the north”. Multifunctional land use in Baise is greatly affected by production function factors. It is recommended to accelerate industrial transformation and upgrading, and give full play to the different ecology, resource, location or policy advantages of each county to improve the level of land production functions, and pay attention to green development, the common development of each function and the regional coordinated development.
Application of Digital Technology in Safety Evaluation of Dabeishan Aqueduct
Authors: Chen W L , Chen X L , Wu W D , Xie Z K 
Published: June 2021

Abstract
A large number of aqueducts were built in China in the 1950s and 1980s, and there are still quite a few aqueducts still undertaking water delivery tasks. Evaluation of existing aqueducts is an important measure to ensure safe water delivery. In order to cope with problems such as the long construction period of the aqueduct and the lack of original design materials, this paper comprehensively uses digital technologies such as drone aerial photography, BIM, and three-dimensional laser scanning. Take Dabeishan Aqueduct for example, carrying out safety test and evaluation. The adopted methods has enriched the methods of safety evaluation of aqueducts and improved the quality of safety evaluation.
Model design of salvaging robot for drilling bit
Authors: Zhang Wenwen , Zhang Wenjia 
Published: June 2021

Abstract
During the construction of bored cast-in-place piles, loosening of the connection between the drill bit and the drill pipe often occurs. When the drill bit falls out, it must be salvaged. In this paper, a method of replacing manual salvage with robots is proposed. Based on STM32F103 technology, a drill-bit salvaging robot is designed with host computer, USBL technology, 3D printing technology, NFR wireless transmission and reception technology, and ultrasonic detection technology, so as to improve economic benefits and reduce manual casualties.
Evacuation of building fire personnel based on BIM+GIS: A review
Authors: Liu Jiaxi , Zhang Rui , Yan Weidong , Sun Li 
Published: June 2021

Abstract
As the consequences of building fire evacuation continue to be severe, some experts and scholars have proposed to combine building information modeling (BIM) technology with geographic information system (GIS) technology to construct a three-dimensional space scene of building fire evacuation. BIM has the advantages of refined three-dimensional modeling, and with the help of evacuation software, people evacuation and its characteristics are simulated, GIS has powerful spatial analysis functions to analyze the path. In this kind of evacuation simulation method, the two technologies complement each other to achieve quantitative analysis of qualitative indicators and efficient visualization of evacuation emergency management. This paper summarizes and analyzes the research on personnel evacuation in recent years by summarizing the current research situation in China, and puts forward the existing problems, hoping to provide ideas for the further research.
Comparative study on settlement calculation of clay core rockfill dam by different constitutive models
Authors: Zhang Zhe-Yu , Ding Chun-Mei 
Published: June 2021

Abstract
The analysis and calculation of the settlement of the clay core rockfill dam is decided by the constitutive relation of the dam material. In this paper, the settlement of the clay core rockfill dam of Luding Hydropower Station under different working conditions is analyzed and calculated by using Duncan E-v and double yield surface elastic-plastic model. E-v model is quite sensitive to Poisson’s ratio, and the small changes of parameters G, D and F may lead to great differences in the deformation calculation results of the model, while the elastic-plastic model with double yield surface is not very sensitive, and its settlement calculation results under different working conditions are relatively stable.
Research on Landscape Design of Hakka Characteristic Towns from the Perspective of Regional Culture
Authors: Cheng Xiao , Lee Kun-Fa 
Published: June 2021

Abstract
Featured towns, along with regional towns in just a few years, have shown an explosive growth of a new industry as a new carrier. In the past, the construction of “a thousand towns with one side” or achievement towns has failed. This study takes the Hakka characteristic town of Zhongyuan Township, Jing’an, Jiangxi as an example, extracts the local regional culture and integrates it into the landscape design, and builds a unique characteristic town with characteristic principles and characteristics as the core.
Safety Evaluation of Large-size Transportation Bridges Based on Combination Weighting Fuzzy Comprehensive Evaluation Method
Authors: Liu Hua , Li Bin , Sun Yiqi , Dou Xiaozheng , Zhang Yongfu , Fan Xianghui 
Published: June 2021

Abstract
The load of large-size vehicles has not been clearly defined in the existing bridge design codes in our country. When large-size vehicles cross the bridge, the bridge has certain safe-ty hazards. At present, there are not many evaluation methods for the driving safety of large-size transportation bridge structures. In order to scientifically evaluate the traffic safety of the large-size transportation bridge structure, this paper considers the factors of bridge, traffic and environment, and establishes the evaluation index system for the operation safety of the large-size transportation bridge structure, using the comprehensive weighting method of the G1-entropy weight method. Calculating the weight and combining the fuzzy comprehensive evaluation method to evaluate the traffic of the large-scale transportation bridge in Huanglong County, Shaanxi Province, the results show that the traffic safety level of the bridge is level II, which has good safety.
The 150th anniversary ofThe Descent of Man: Darwin and the impact of sex-role reversal on sexual selection research
Authors: Fritzsche Karoline , Henshaw Jonathan M , Johnson Bernadette D , Jones Adam G 
Published: June 2021

AbstractThe year 2021 marks the 150th anniversary of the publication of Charles Darwin’s extraordinary book The Descent of Man and Selection in Relation to Sex. Here, we review the history and impact of a single profound insight from The Descent of Man: that, in some few species, females rather than males compete for access to mates. In other words, these species are ‘sex-role reversed’ with respect to mating competition and sexual selection compared to the majority of species in which sexual selection acts most strongly on males. Over the subsequent 150 years, sex-role-reversed species have motivated multiple key conceptual breakthroughs in sexual selection. The surprising mating dynamics of such species challenged scientists’ preconceptions, forcing them to examine implicit assumptions and stereotypes. This wider worldview has led to a richer and more nuanced understanding of animal mating systems and, in particular, to a proper appreciation for the fundamental role that females play in shaping these systems. Sex-role-reversed species have considerable untapped potential and will continue to contribute to sexual selection research in the decades to come.
Optimization and Validation of a Facile RP-HPLC Method for Determination of Betrixaban and Lercanidipine in Pharmaceutical and Biological Matrices
Authors: El-Masry Amal A , El-Wasseef Dalia R , Eid Manal , Shehata Ihsan A , Zeid Abdallah M 
Published: June 2021

AbstractA simple, accurate, rapid and sensitive reversed-phase high-performance liquid chromatography (RP-HPLC) method was established for determination of a novel non-vitamin K antagonist oral anticoagulant drug, betrixaban, and its co-administered calcium-channel blocker drug, lercanidipine, in pharmaceutical formulations and biological fluids. The proposed HPLC method was the first chromatographic method applied to estimate this mixture in a short chromatographic run (&lt;6 min), high resolution between betrixaban/lercanidipine (Rs = 7.12) and acceptable values of limit of detection (LOD), limit of quantification (LOQ) and percentage of relative standard deviation (%RSD). The chromatographic separation was performed on a cyano column using a mobile phase composed of acetonitrile:methanol:water (35:35:30, v/v/v) containing 0.2% orthophosphoric acid adjusted to pH 3.2 by triethylamine, programmed with a flow rate of 1 mL/min with UV detection at 240 nm. The proposed method showed linearity over the concentration ranges of (0.20–20.0 μg/mL) and (0.25–25.0 μg/mL) for betrixaban and lercanidipine, respectively. All validation parameters met the acceptance criteria according to ICH guidelines in terms of linearity, LOD, LOQ, accuracy, precision, robustness, specificity and system suitability. The method was applied to assay the studied analytes in their pharmaceutical formulations with high % recovery (98–102%) and low %RSD (&lt;1.5). Furthermore, the proposed method was successfully applied for the determination of betrixaban in spiked human plasma.
On the phenology of protists: recurrent patterns reveal seasonal variation of protistan (Rhizaria: Cercozoa and Endomyxa) communities in tree canopies
Authors: Walden Susanne , Jauss Robin-Tobias , Feng Kai , Fiore-Donno Anna Maria , Dumack Kenneth , Schaffer Stefan , Wolf Ronny , Schlegel Martin , Bonkowski Michael 
Published: June 2021

ABSTRACTTree canopies are colonized by billions of highly specialized microorganisms that are well adapted to the highly variable microclimatic conditions, caused by diurnal fluctuations and seasonal changes. In this study, we investigated seasonality patterns of protists in the tree canopies of a temperate floodplain forest via high-throughput sequencing with group-specific primers for the phyla Cercozoa and Endomyxa. We observed consistent seasonality, and identified divergent spring and autumn taxa. Tree crowns were characterized by a dominance of bacterivores and omnivores, while eukaryvores gained a distinctly larger share in litter and soil communities on the ground. In the canopy seasonality was largest among communities detected on the foliar surface: In spring, higher variance within alpha diversity of foliar samples indicated greater heterogeneity during initial colonization. However, communities underwent compositional changes during the aging of leaves in autumn, highly reflecting recurring phenological changes during protistan colonization. Surprisingly, endomyxan root pathogens appeared to be exceptionally abundant across tree canopies during autumn, demonstrating a potential role of the canopy surface as a physical filter for air-dispersed propagules. Overall, about 80% of detected OTUs could not be assigned to known species—representing dozens of microeukaryotic taxa whose canopy inhabitants are waiting to be discovered.
The Nexus of Sensory Loss, Cognitive Impairment, and Functional Decline in Older Adults: A Scoping Review
Authors: Liu Chiung-ju , Chang Pei-Shiun , Griffith Cheryl F , Hanley Stephanie I , Lu Yvonne 
Published: June 2021

Abstract

Background and Objectives
The prevalence of cognitive impairment and sensory loss in hearing or vision increases with age. Based on the Information Processing Model, cognitive impairment coupled with sensory loss may exacerbate disability in late life. Yet this issue has not been systematically studied. The purpose of this scoping review was to examine the literature that studied the relationship between cognitive impairment, sensory loss, and activities of daily living in older adults.

Research Design and Methods
Two reviewers independently screened 1,410 studies identified from 5 electronic databases (Medline, EMBASE, PsycINFO, CINHAL, and Web of Science). The search was completed in June 2020. A study was eligible if it included measurements of cognitive function, vision or hearing, and activities of daily living. Additionally, the data analyses must address how cognitive impairment and sensory loss are related to the performance of activities of daily living.

Results
The final review included 15 studies. Findings show an additive effect of cognitive impairment and sensory loss on the activities of daily living. Cognitive impairment or vision loss independently relates to the decline in activities of daily living. Hearing loss relates to the decline only when the loss is severe, or if the daily task is hearing - specific.

Discussion and Implications
Older adults with coexisting sensory loss and cognitive impairment have the highest risk or prevalence of disability, comparing to cognitive impairment or sensory loss alone. This finding highlights the importance of developing interventions to reduce the risk of disability for older adults experiencing multiple impairments.
Stationary peaks in a multivariable reaction–diffusion system: foliated snaking due to subcritical Turing instability
Authors: Knobloch Edgar , Yochelis Arik 
Published: June 2021

Abstract
An activator–inhibitor–substrate model of side branching used in the context of pulmonary vascular and lung development is considered on the supposition that spatially localized concentrations of the activator trigger local side branching. The model consists of four coupled reaction–diffusion equations, and its steady localized solutions therefore obey an eight-dimensional spatial dynamical system in one spatial dimension (1D). Stationary localized structures within the model are found to be associated with a subcritical Turing instability and organized within a distinct type of foliated snaking bifurcation structure. This behavior is in turn associated with the presence of an exchange point in parameter space at which the complex leading spatial eigenvalues of the uniform concentration state are overtaken by a pair of real eigenvalues; this point plays the role of a Belyakov–Devaney point in this system. The primary foliated snaking structure consists of periodic spike or peak trains with $N$ identical equidistant peaks, $N=1,2,\dots \,$, together with cross-links consisting of nonidentical, nonequidistant peaks. The structure is complicated by a multitude of multipulse states, some of which are also computed, and spans the parameter range from the primary Turing bifurcation all the way to the fold of the $N=1$ state. These states form a complex template from which localized physical structures develop in the transverse direction in 2D.
Barriers to evidence-based practice implementation in physiotherapy: a systematic review and meta-analysis
Authors: Paci Matteo , Faedda Gianni , Ugolini Alessandro , Pellicciari Leonardo 
Published: June 2021

AbstractBackgroundTo review and meta-analyse the evidence about the prevalence of barriers to evidence-based practice (EBP) reported in physiotherapy.MethodsTwo independent investigators conducted an extensive electronic search in EMBASE, PubMed, Scopus, Web of Science and CINAHL databases from their inception to July 2020 and included the retrieved articles if they investigated barriers to EBP among physiotherapy professionals. Subsequently, they extracted data and assessed the methodological quality using a scale described in a similar previous study. The outcome for meta-analysis was frequency of each reported barrier. Sub-analyses were performed grouping studies based on countries where surveys were performed, classified as either developed or developing countries.ResultsTwenty-nine articles were included in the systematic reviews and meta-analysis. Risk of bias assessment of included studies showed a median score: 4 points (interquartile range: 3–4). The findings of meta-analysis revealed that lack of time was the most frequently reported barrier (53.0% [95% confidence interval, 95%CI, 44.0–62.0]), followed by language (36.0% [95%CI 16.0–62.0]), lack of access (34.0% [95%CI 23.0.27]) and lack of statistical skills (31.0% [95%CI 20.0–44.0]). Lack of skills and lack of generalizability were declared as barriers by 27.0% [95%CI 18.0–38.0] and 23.0% [95%CI 15.0–33.0] of responders, respectively. Lack of support and lack of interest are less frequent, with 16.0% [95%CI 11.0–24.0] and 9.0% [95%CI 6.0–15.0] of responses, respectively. Barriers reported in investigations performed in developed countries were less frequent when compared to those performed in developing countries.ConclusionOrganizational issues and methodological skills seem key issues to allow the implementation of EBP, suggesting the need to adopt or enhance organizational and training strategies to facilitate the implementation of the EBP. Quantitative synthesis showed high heterogeneity for all analyses, and therefore, pooled data should be interpreted with caution.