bluuebunny/crossref_metadata_2025_split huggingface dataset:
The Burial and Thermal Histories of Wufeng-Longmaxi Shale of Well Anye-1, Zheng’an Area, North Guizhou
Authors: Shi Shuyong , Wang Yunpeng , Sun Yu , Liu Min 
Published: October 2019

Abstract
Great breakthrough had taken place in the field of shale gas exploration of Wufeng-Lonmgaxi shale in Zheng’an Area, North Guizhou. In this paper, we reconstruct the one-dimensional geological model of Well Anye-1 by using PetroMod software. The burial history shows that the Wufeng-Longmaxi shale of Well Anye-1 mainly experienced four erosion movements. It reached the maximum burial depth (5331 m) at the late Cretaceous and the current burial depth is 2331 m. The thermal history shows that the shale started to generated oil (Ro>0.55 %) at the middle Devonian, entered into the wet gas stage (Ro=1.30-2.00%) at middle Jurassic and the dry gas stage (Ro>2.00 %) at the end of early Cretaceous, and now the thermal maturity is around 2.07 %Ro.
Geochemical characteristics and accumulation model of Devonian natural gas in Northwestern Sichuan Basin, China
Authors: Xie Z Y , Yang C L , Zhang L , Dong C Y , Guo J Y , Guo Z Q , Wang Z H , Hao A S 
Published: October 2019

Abstract
Gas exploration has made major breakthrough firstly in Devonian strata in northwest Sichuan Basin, and its natural gas source have attracted much attention. In this work we developed comprehensive researches on natural gas geochemistry, reservoir bitumen and related source rock biomarkers of Devonian. Result shows: Natural gas in Devonian is secondary cracking gas dominated by hydrocarbon gas. It is major in sapropel type gas and comes from the source rock of Qiongzhusi Formation of Lower Cambrian and Middle Permian, mainly from the former. There are two reservoir accumulation model for gas in Devonian: lower source to upper reservoir and upper source to lower reservoir. Result is of important guidance significance for the exploration deployment of natural gas in this area.
Hydrocarbon generation potential of residual kerogens in high-over matured shale rocks and its contribution to shale gas reserves
Authors: Xu J B , Wei Z W , Deng Q , Cheng B , Faboya O L , Liao Z W 
Published: October 2019

Abstract
A low matured shale rock from Lucaogou Formation in the Santanghu Basin was thermally simulated using semi-open system pyrolysis experiment in attempt to evaluate its late gas generation potential. The Rock-Eval results showed that the residual kerogen in the high-over matured shale rocks still possess some hydrocarbon generation potential. The amount of the pyrolyzable hydrocarbons (S2) generated from the residual kerogen ranged from 0.57 to 1.02 mg HC/g rock. The S2 and hydrogen index (HI) values began to diminish at EasyRo
> 1.45%. About 1 m3/t rock of methane was estimated from Lucaogou Formation at high-over maturity stage. This indicates that the hydrocarbon generation potential of residual kerogens in the high-over matured shale rocks have a significant contribution to shale gas reserves.
Improvement of Fatigue Strength of Additive Manufactured Metals by Solid-Liquid-Gas Interfacial Phenomena Induced by Pulse Laser
Authors: Soyama Hitoshi 
Published: October 2019

AbstractAlthough additive manufactured (AM) metals are attractive materials, the fatigue strength of AM metals are considerably weak comparing with that of wrought materials. The mechanical surface treatment such as shot peening can improve the fatigue strength of metallic materials. Recently, a novel mechanical surface treatment using solid-liquid-gas interfacial phenomena induced by pulse laser has been developed. In the present paper, in order to demonstrate the improvement of fatigue strength of AM metals by solid-liquid-gas interfacial phenomena, titanium alloy Ti6Al4V manufactured by electron beam melting EBM was treated by submerged pulse laser and tested by a plane bending fatigue test. The key factors were investigated by evaluating the relation between the fatigue properties and mechanical properties of the surface treated by submerged laser peening, cavitation peening and shot peening.
Corrosion Study on Ni-based Alloy in Acidic Environment
Authors: Shi Yuejuan , Liu Yanling , Wang Xuepeng , Zhou Yongxing , Ma Jun , Zhang Shuai 
Published: October 2019

Abstract
Ni-based alloys have excellent corrosion resistance and are widely used in the petrochemical industry. In this study, the effects of sulfuric acid concentration on the corrosion resistance of Ni-based alloys were analyzed by software simulation and electrochemical tests. The results show that the corrosion rate of the alloy is gradually increased with the increase of sulfuric acid concentration, and the influence of sulfuric acid concentration on the corrosion rate of 304 stainless steel is greater than that of nickel-based alloy. In a 10% sulfuric acid solution, the corrosion rate of the four nickel-base alloy samples is only one-twentieth of that of the 304 stainless steel substrate.
Finite Element Analysis of Overhead Pipeline Truss Bridge under Thermal Fluid Loads
Authors: Lin Guantang , Huang Si , Niu Qifeng , Xu Zhengnan , Zhang Cong , Chen Yinghong 
Published: October 2019

Abstract
The subject used in this study is an overhead pipeline truss bridge which sits in a chemical industrial park. The overhead pipeline truss bridge is a part of a pipeline system consisting of 10 sets of columns, 4 layers of pipe racks and 27 pipelines that transports flowing media under various temperature and pressure conditions. An integrated ANSYS finite element model was built considering the factors such as gravity, medium temperature, and flow load, etc. The results of the distributions of displacement, axial force, shear force, bending moment and stress of the overhead pipeline truss bridge were calculated. The primary stress and secondary stress were checked to judge the reliability of the overhead pipeline truss bridge. It concluded that the computation model and calculation used in this study is feasible and effective. The feature in this paper is to explore a practical method and to provide a solid technological foundation for the safety operation and assessment of overhead pipeline truss bridge.
Research on Improved Localization and Navigation Algorithm for Automatic Guided Vehicle
Authors: Liu Xiaohui , Wei Wu , Gao Yong , Wei Xiaoqin 
Published: October 2019

Abstract
Aiming at the problem of inaccurate positioning caused by the wheel slippage or “kidnapping” movement of the robot in the positioning navigation, an improved autonomous positioning navigation strategy based on the robot operating system (ROS) is proposed. Firstly, combined with adaptive Monte Carlo localization (AMCL) algorithm and laser-based point-and-line iterative closest/corresponding point (PLICP) pose estimation algorithm, the accuracy and robustness of positioning are effectively improved. Then, based on the path planning strategy combining A* algorithm and dynamic window algorithm (DWA), an improved navigation failure recovery method is proposed and integrated into the ROS navigation framework, which can effectively improve the efficiency of robot positioning navigation and task execution. Finally, the mobile robot model TurtleBot is used as the experimental platform. The simulation experiment and field test demonstrate that the improved algorithm is superior to the original algorithm. The improved algorithm can adapt to the inaccuracy of the odometer and can achieve accurate localization and navigation in long-distance environment.
Research on Coplanar Orbit Maneuvering in the Context of on-Orbit Service
Authors: Koryanov Vsevolod V , Zhang Budang 
Published: October 2019

Abstract
The concept of on-orbit service is introduced, and the development process of on-orbit service is briefly reviewed. The optimal transfer plan of orbit transfer and rendezvous is studied in the context of on-orbit service. The circular orbit motion with perturbation is used to study the near-circle orbit maneuver, and the general equation of coplanar maneuver is established based on the cylindrical coordinate system. The influences of the orbital parameters and the difference initial phase between the coaxial orbits on the optimal transfer orbit are calculated by Matlab simulation.
Dialectical Understanding of Information in the Context of the Artificial Intelligence Problems
Authors: Suleimenov Ibragim E , Gabrielyan Oleg A , Bakirov Akhat S , Vitulyova Yelizaveta S 
Published: October 2019

Abstract
It is shown that the implementation of breakthrough progress in artificial intelligence cannot be accomplished without a radical modernization of the methodological framework for research in this area. This upgrade can be performed only with the use of conceptual and methodological apparatus of dialectics. Its consistent application to objects, in either case connected with ideas about the intellect, results in the formulation of the dialectic symmetry principle. The first practical steps for the implementation of the proposed concept in practice are associated with the creation of a new education paradigm, which operates, including ideas that “education” being understood as a public institution, is not reducible to individual learning. Education in modern conditions can and should be viewed primarily as a tool to influence public consciousness, or more precisely, its subsystems.
Experimental Study on the Effect of Two Equal-Sized Holes Lying at Different Angles in a CFRP Plate under Bending
Authors: Bunyawanichakul Phacharaporn , Limpitipanich Paiboon , Siribodhi Pongwit 
Published: October 2019

Abstract
A bending test method was designed to investigate the failure characteristics of drilling carbon-fiber reinforced composite (CFRP) plates. The CFRP plates were fabricated and drilled to join other parts for use in aircraft structures (riveting or bolting). Each sample had two equal-sized holes at 0, θ, or -θ degrees at a fixed distance of 36 mm in the longitudinal direction. The sample dimensions were identified following a study on tensile testing singleholed samples based on the ASTM D5961 standard. The tensile test focused on three cases of laminate: [0]14, [22.5]14, and [45]14. The maximum mean forces for [0]14, [22.5]14, and [45]14 laminate configurations were 6.32, 6.59, and 7.12 kN respectively. These results were implemented into a bending test which included two configurations of laminate: [0]14 and [45]14 and two equal-sized holes with a variable distance of 0 and 9 mm in the transverse direction of the plate. The bending test configuration is presented in this paper. The results revealed different load-bearing capabilities in each of the three types of specimen configuration. Samples with two holes lying at ±9 degree affected the overall strength in the [45]14 case, and as in [0]14 there was no difference between the eccentricity and the aligned holes. In [45]14, the eccentricity decreased the maximum allowable force by 1.57 percent in the normal eccentricity case and by 15.94 percent in the alternate eccentricity case compared to the aligned case.
Development and Application of Image-base Plantar Measurement System
Authors: Lo Hsien-Chung , Pan Guo-Xiang , Chang Hui-Ling , Chang Chong-Ching 
Published: October 2019

Abstract
The foot pain affects daily life function about 14-4b2% of adults over the age of 45 years old, since feet bear all the weight of the body. The most foot problems come from a great impact on the human body. It affects not only bone structures, but also the organs. Plantar information can be checked through the plantar pressure and arch index. The plantar pressure distribution is related to the walking balance, while the arch index can understand the foot bone structure. The paper aims to develop a system of plantar self-detection which is economical and easy to carry and operate. The system has built up two parts: one is the image capture equipment; another is the data analysis software. The portable scanning platforms can obtain high-resolution image, scanning work area is 216x356mm which the resolution is 1200dpi image. It only needs 10 seconds, using the wireless transmission to the plantar image through the pad for data analysis, calculated the plantar pressure distribution and arch index. The whole system price is less than one-tenth of the market selling pressure pad, providing a general system which is designed for plantar self-detection.
Patterns of floral morphology in relation to climate and floral visitors
Authors: Weber Urs K , Nuismer Scott L , Espíndola Anahí 
Published: October 2019

AbstractBackground and AimsThe diversity of floral morphology among plant species has long captured the interest of biologists and led to the development of a number of explanatory theories. Floral morphology varies substantially within species, and the mechanisms maintaining this diversity are diverse. One possibility is that spatial variation in the pollinator fauna drives the evolution of spatially divergent floral ecotypes adapted to the local suite of pollinators. Another possibility is that geographic variation in the abiotic environment and local climatic conditions favours different floral morphologies in different regions. Although both possibilities have been shown to explain floral variation in some cases, they have rarely been competed against one another using data collected from large spatial scales. In this study, we assess floral variation in relation to climate and floral visitors in four oil-reward-specialized pollination interactions.MethodsWe used a combination of large-scale plant and pollinator samplings, morphological measures and climatic data. We analysed the data using spatial approaches, as well as traditional multivariate and structural equation modelling approaches.Key ResultsOur results indicate that the four species have different levels of specialization, and that this can be explained by their climatic niche breadth. In addition, our results show that, at least for some species, floral morphology can be explained by the identity of floral visitors, with climate having only an indirect effect.ConclusionsOur results demonstrate that, even in very specialized interactions, both biotic and abiotic variables can explain a substantial amount of intraspecific variation in floral morphology.
Fat Hypertrophy as a Complication of Fat Transfer for Hemifacial Atrophy
Authors: Jeon Faith H K , Varghese Jajini , Griffin Michelle , Mosahebi Afshin , Butler Peter E , Withey Simon , Henderson Hugo 
Published: October 2019

Abstract

Fat hypertrophy is a less commonly known complication of autologous fat transfer. We present a 32-year-old female with left hemifacial atrophy associated with systemic sclerosis, who was treated with 7 fat transfer procedures to correct the facial asymmetry. A total of 236.5 mL of fat was injected to the hemiface over a 4-year period to achieve good symmetry. A progressively enlarging, painless, soft mass over the left parotid region was noted at 3 months after the final fat transfer procedure. Magnetic resonance imaging showed a markedly enlarged bulk of subcutaneous fat over the left cheek with no evidence of necrosis, edema, or pathologic enhancement. Concurrent weight gain was noted secondary to additional nutritional input. The patient’s aesthetic, symptomatic, and functional concerns led to the subsequent removal of 115 mL fat by liposuction.

Level of Evidence: 5
mCSM-AB2: guiding rational antibody design using graph-based signatures
Authors: Myung Yoochan , Rodrigues Carlos H M , Ascher David B , Pires Douglas E V 
Published: October 2019

Abstract

Motivation
A lack of accurate computational tools to guide rational mutagenesis has made affinity maturation a recurrent challenge in antibody (Ab) development. We previously showed that graph-based signatures can be used to predict the effects of mutations on Ab binding affinity.

Results
Here we present an updated and refined version of this approach, mCSM-AB2, capable of accurately modelling the effects of mutations on Ab–antigen binding affinity, through the inclusion of evolutionary and energetic terms. Using a new and expanded database of over 1800 mutations with experimental binding measurements and structural information, mCSM-AB2 achieved a Pearson’s correlation of 0.73 and 0.77 across training and blind tests, respectively, outperforming available methods currently used for rational Ab engineering.

Availability and implementation
mCSM-AB2 is available as a user-friendly and freely accessible web server providing rapid analysis of both individual mutations or the entire binding interface to guide rational antibody affinity maturation at http://biosig.unimelb.edu.au/mcsm_ab2

Supplementary information
Supplementary data are available at Bioinformatics online.
Genomic data reveal similar genetic differentiation in aquifer species with different dispersal capabilities and life histories
Authors: Jordan Steve , Hand Brian K , Hotaling Scott , Delvecchia Amanda G , Malison Rachel , Nissley Clark , Luikart Gordon , Stanford Jack A 
Published: October 2019

Abstract
Little is known about the life histories, genetic structure and population connectivity of shallow groundwater organisms. We used next-generation sequencing (RAD-seq) to analyse population genomic structure in two aquifer species: Paraperla frontalis (Banks, 1902), a stonefly with groundwater larvae and aerial (winged) adults; and Stygobromus sp., a groundwater-obligate amphipod. We found similar genetic differentiation in each species between floodplains separated by ~70 river km in the Flathead River basin of north-west Montana, USA. Given that Stygobromus lacks the above-ground life stage of P. frontalis, our findings suggest that connectivity and the magnitude of genetic structure cannot be definitively assumed from life history differences.
Consistent community detection in multi-layer network data
Authors: Lei Jing , Chen Kehui , Lynch Brian 
Published: October 2019

Summary
We consider multi-layer network data where the relationships between pairs of elements are reflected in multiple modalities, and may be described by multivariate or even high-dimensional vectors. Under the multi-layer stochastic block model framework we derive consistency results for a least squares estimation of memberships. Our theorems show that, as compared to single-layer community detection, a multi-layer network provides much richer information that allows for consistent community detection from a much sparser network, with required edge density reduced by a factor of the square root of the number of layers. Moreover, the multi-layer framework can detect cohesive community structure across layers, which might be hard to detect by any single-layer or simple aggregation. Simulations and a data example are provided to support the theoretical results.
Subclinical leaflet thrombosis is associated with impaired reverse remodelling after transcatheter aortic valve implantation
Authors: Szilveszter Bálint , Oren Daniel , Molnár Levente , Apor Astrid , Nagy Anikó I , Molnár Andrea , Vattay Borbála , Kolossváry Márton , Karády Júlia , Bartykowszki Andrea , Jermendy Ádám L , Suhai Ferenc I , Panajotu Alexisz , Maurovich-Horvat Pál , Merkely Béla 
Published: October 2019

Abstract

Aims
Cardiac CT is increasingly applied for planning and follow-up of transcatheter aortic valve implantation (TAVI). However, there are no data available on reverse remodelling after TAVI assessed by CT. Therefore, we aimed to evaluate the predictors and the prognostic value of left ventricular (LV) reverse remodelling following TAVI using CT angiography.

Methods and results
We investigated 117 patients with severe, symptomatic aortic stenosis (AS) who underwent CT scanning before and after TAVI procedure with a mean follow-up time of 2.6 years after TAVI. We found a significant reduction in LV mass (LVM) and LVM indexed to body surface area comparing pre- vs. post-TAVI images: 180.5 ± 53.0 vs. 137.1 ± 44.8 g and 99.7 ± 25.4 vs. 75.4 ± 19.9 g/m2, respectively, both P &lt; 0.001. Subclinical leaflet thrombosis (SLT) was detected in 25.6% (30/117) patients. More than 20% reduction in LVM was defined as reverse remodelling and was detected in 62.4% (73/117) of the patients. SLT, change in mean pressure gradient on echocardiography and prior myocardial infarction was independently associated with LV reverse remodelling after adjusting for age, gender, and traditional risk factors (hypertension, body mass index, diabetes mellitus, and hyperlipidaemia): OR = 0.27, P = 0.022 for SLT and OR = 0.22, P = 0.006 for prior myocardial infarction, OR = 1.51, P = 0.004 for 10 mmHg change in mean pressure gradient. Reverse remodelling was independently associated with favourable outcomes (HR = 0.23; P = 0.019).

Conclusion
TAVI resulted in a significant LVM regression on CT. The presence of SLT showed an inverse association with LV reverse remodelling and thus it may hinder the beneficial LV structural changes. Reverse remodelling was associated with improved long-term prognosis.
Three-valve endocarditis in a patient with bioprosthetic aortic valve replacement and intravenous drug use: a case report
Authors: Javaid Awad , Sehgal Sumit , Dazley Jason 
Published: October 2019

Abstract

Background
Here, we outline the case of a US Veteran’s Health Administration (VA) patient with a history of recent bioprosthetic aortic valve replacement (AVR) and recent intravenous drug use (IVDU) who was found to have three-valve infective endocarditis (IE) resulting in septic shock. We highlight this case because it represents an uncommon case of three-valve IE in the setting of recent bioprosthetic valve replacement and IVDU, and it raises the need for continued awareness of mental health and drug rehabilitation in the US military veteran population.

Case summary
A 62-year-old gentleman with recent bioprosthetic AVR presented with dyspnoea and lower extremity oedema and was found to have a heart failure exacerbation. He developed sepsis and was found to have three-valve endocarditis, as well as aortic root abscess and pacemaker lead infection. He was treated with broad-spectrum antibiotics and evaluated for surgical intervention. After discussion with the surgical team, the patient decided not to pursue surgery due to prohibitively high perioperative mortality risk. The patient was transferred to hospice and expired within 2 weeks.

Discussion
Three-valve IE is sparingly documented in published literature and can be difficult to treat. Providers must be cognizant of prosthetic valve endocarditis as an uncommon but known complication of valve replacement surgery. Intravenous drug use is a common risk factor for endocarditis and is prevalent in the US military veteran population. Prosthetic valve endocarditis should be treated with broad-spectrum antibiotics, and in general, if it leads to new significant valvular abnormalities, the valve should be replaced.
Coal Smoke, City Growth, and the Costs of the Industrial Revolution
Authors: Hanlon W Walker 
Published: October 2019

Abstract
This article provides the first rigorous estimates of how industrial air pollution from coal burning affects long-run city growth. I introduce a new theoretically grounded strategy for estimating this relationship and apply it to data from highly polluted British cities from 1851 to 1911. I show that local industrial coal use substantially reduced long-run city employment and population growth. Moreover, a counterfactual analysis suggests that plausible improvements in coal-use efficiency would have led to a higher urbanisation rate in Britain by 1911. These findings contribute to our understanding of the effects of air pollution and the environmental costs of industrialisation.