bluuebunny/crossref_metadata_2025_split huggingface dataset:
Research on the Key Technologies of the Ubiquitous Electric Internet of Things
Authors: JiaDong Zhu 
Published: November 2020

Abstract
With the rapid development of social economy in China, the demand for electric power resources for all the industries is increasing, and it also puts forward higher requirements for the development and operation of electric power industry. In this context, the power industry is also constantly using new technologies for positive and efficient innovation. The Ubiquitous Electric Internet of Things is a new technology. In the practical application, the Ubiquitous Electric Internet of Things mainly relies on electronic information technology, uses the big clouds move wisdom and other network means to combine with the power system to ensure the power production and the user’s connection more closely and to implement the one-stop service and the management for the user and so on. The construction and application of the Ubiquitous Electric Internet of Things can speed up the development of electric power industry in China, and realize the far-reaching development of electric power industry, so it is of practical significance to study its key technologies.
Massive Malware Variants Detection Based on Bag-of-words Perceptual Hashing
Authors: Yu Jian 
Published: November 2020

Abstract
Presently, most widely used malware detection methods use signature with reverse engineering to recognize malware variants. Nevertheless, this approach is problematic because the signatures simply modified by using packers on which compress and/or encrypt the executable code to evade detection. In this paper, we present a novel Bag-of-words perceptual hashing to detect variants. The proposed method visualizes malware binary code as grey-scale image, extracts the Grey-level Co-occurrence Matrix features vector and using Bag-of-words model to generate perceptual hashing for malware variants detection. Experimental results show that, the proposed method has a high accuracy and fast detection speed, and has good resilience to popular packers, which is suitable for massive malware variants detection.
Research on Laser-Visual Fusion-based Simultaneous Localization and Mapping
Authors: Zhenga Jianjie , Zhang Haitao , Tang Kai , Kong Weidi 
Published: November 2020

Abstract
In consideration of the restrictions of the single-sensor SLAM system in different application scenarios, this paper proposes a laser-visual sensor fusion strategy on the basis of analyzing the strengths and weaknesses of laser SLAM and visual SLAM. In the local mapping stage, the laser stability is used to facilitate the visual SLAM system while in the global map generation stage, the point cloud map with rich texture information as constructed by the visual SLAM system is used to improve the missing map information of the laser SLAM system and finally obtain a globally consistent 2D grid map. Through indoor real scene experiments, the fused SLAM system is verified so as to improve the accuracy of localization and mapping and yield a favorable robustness by combining the strengths of both effectively.
Performance comparison of CKF and UKF in passive state noise of UAV
Authors: qingshun Huang , bing Deng 
Published: November 2020

Abstract
Interacting multiple model (IMM) is widely used in target tracking, and is recognized as the most effective method for maneuvering target tracking. In order to remove the motion state noise in UAV passive location, this paper uses the idea of target tracking algorithm for reference. By setting the observation station data points in advance, introducing detection factors into CV and CT models, and then constructing measurement equations through geometric kinematics and fusing IMM algorithm, the filtering performance of IMM-CKF-CV-CT and IMM-UKF-CV-CT under typical s-maneuver in two-dimensional plane is studied. The simulation results of MATLAB show that IMM-CKF-CV-CT has higher accuracy and stronger stability than IMM-UKF.
Robot dynamic trajectory tracking control algorithm based on steady-state closed-loop learning
Authors: Xiaoshengchen  
Published: November 2020

Abstract
In order to improve the stability control ability of flexible lower limb exoskeleton robot, a dynamic trajectory tracking control algorithm of flexible lower limb exoskeleton robot based on steady-state closed-loop learning is proposed. Gyroscope and rangefinder are used as information sensors of flexible lower limb exoskeleton robot to collect position information of flexible lower limb exoskeleton robot, fuse collected positioning information of flexible lower limb exoskeleton robot, fuse physical information and measure parameters of flexible lower limb exoskeleton robot by using dynamic information measurement method, and obtain mapping feature set of Cartesian space according to trajectory components of flexible lower limb exoskeleton robot. The pose information of the flexible lower limb exoskeleton robot is obtained through the forward kinematics, and the information is enhanced according to the spatial position information. The steady-state closed-loop learning method is adopted to realize the adaptive learning of the robot dynamic trajectory tracking control. The simulation results show that this method is adaptive to the dynamic trajectory tracking control of the robot, and the positioning control ability of the robot is strong.
Application of Big Data Technology in E-commerce
Authors: Shen Yang 
Published: November 2020

Abstract
Big data is a new type of conceptual content in recent years. Through the application of big data, it can effectively analyze massive amounts of data and associate various data together, which can have a positive significance for various social productions. This article summarizes the application advantages of big data technology in e-commerce based on previous work experience. The author also discusses the application of big data technology in e-commerce field from investigating target market, optimizing internal management, carrying out precision marketing and optimizing credit evaluation these five aspects of brand effect.
Chemical synthesis and research nanopowder of magnetic hard alloy Nd15Fe78B7
Authors: Abdurakhmonov O E , Yurtov E V , Savchenko E S , Savchenko A G 
Published: November 2020

Abstract
Hard magnetic nanopowders of the Nd15Fe78B7 alloy were synthesized by the reduction-diffusion reaction of a stoichiometric mixture of Nd, Fe, and Fe-B oxides with CaH2 in a hydrogen atmosphere at 800 ° C. Nd, Fe, Fe-B oxides were obtained by precipitation and had the form of granules with an average particle size of neodymium oxide - 50 nm, iron oxide - 95 nm, iron borate - 57 nm. The particle size of the Nd15Fe78B7 alloy was 45-140 nm. It is shown that the proposed method is suitable for obtaining nanopowders of hard magnetic alloys of the Nd-Fe-B system.
Diamond-like carbon coatings alloyed with chromium – nanocomposite structure and tribological behavior in conditions of dry and boundary lubricated friction
Authors: Khrushchov M M , Buyanovskii I A , Marchenko E A , Samusenko V D , Antonova O S 
Published: November 2020

Abstract
The results have been presented of the vacuum deposited diamond-like carbon (DLC) coatings alloyed with chromium investigation devoted to elucidate the mechanisms of their friction and wear in the conditions of unlubricated and partially lubricated tribological contact. It has been demonstrated that in these coatings the features of their micro- and nanocomposite structure formed by the nanosized inclusions of metallic chromium and its interstitials in the DLC matrix have a significant influence on the tribological behavior under dry friction. In the case of a boundary lubricated contact the common practice is to associate the main role of alloying elements with the peculiarities of their tribochemical interaction with the chemically active components of the lubricant. However the present investigation has not confirmed the existence of such a synergistic effect of to tribochemical interaction of alloying metal and chemically active lubricant additives for the coatings obtained via magnetron sputtering of chromium in acetylene-based reactive atmosphere.
Effect of rotary swaging and subsequent aging on the implant-relevant properties of magnesium alloy WE43
Authors: Martynenko N S , Anisimova N Yu , Temralieva D R , Kiselevskiy M V , Morozov M M , Yusupov V S , Dobatkin S V , Estrin Y Z 
Published: November 2020

Abstract
The magnesium alloy WE43 were pre-strained by rotary swaging (RS) with a final temperature of 350°C. RS led to a significant grain refinement with the formation of a predominantly subgrain structure. The average size of the structural elements decreased up to 450±50 nm after RS. In addition, the RS-induced precipitation of intermetallic Mg41Nd5 particles with an average size of 210±13 nm was observed. Subsequent heat treatment caused the average size of structural elements and intermetallic particles to grow to 781±88 nm and 494±51 nm, respectively. After RS, the ultimate tensile strength (UTS) of the alloy rose to 363±2 MPa with tensile elongation of 11.4±0.6%. After heat treatment, the UTS of the alloy increased to 376±9 MPa, with some drop of tensile elongation to 7.6±0.4%. Interestingly, the biocorrosion resistance of the alloy was not compromised by RS, while subsequent heat treatment of the swaged alloy reduced its biodegradation rate. No significant differences in the biocompatibility of the alloy WE43 between different microstructural states were observed. It was found that RS with subsequent aging of the alloy WE43 reduces the adhesion of yeast to its surface, which in the long term may reduce the risk of infectious complications after orthopedic surgery.
Microstructure and Mechanical Properties of AISI 304L Austenitic Stainless Steel Processed by Various Schedules of Rolling
Authors: Raab A G , Raab G I , Tokar A A , Rybalchenko O V , Belyakov A N , Dobatkin S V , La P 
Published: November 2020

Abstract
The paper studies various rolling schedules implemented at 500°C (incl. direct, reverse, and cross rolling) and their effect on the structure formation and mechanical properties in AISI 304L stainless steel samples. Both TEM and SEM research techniques were applied. An ultrafine grain-subgrain microstructure was found to be formed inside elongated original grains. Rolling-processed microstructural elements were close in their size with the minimum value observed after a reverse rolling (240 nm). Mechanical properties were studied using microhardness measurements and tensile testing revealing a considerable increase in strength accompanied by a density reduction upon deformation. The strength values in the material subjected to all three rolling schedules are relatively close to the highest yield strength and ultimate tensile stress observed after reverse rolling with a strain degree of 70%.
Social isolation, loneliness and functional disability in Chinese older women and men: a longitudinal study
Authors: Guo Lizhi , An Li , Luo Fengping , Yu Bin 
Published: November 2020

Abstract

Objective
This study investigated whether loneliness or social isolation is associated with the onset of functional disability over 4 years among Chinese older populations.

Setting and Subjects
This study used data from the China Health and Retirement Longitudinal Study (CHARLS). Functional status was assessed by activities of daily living (ADL) and instrumental activities of daily living (IADL). Analyses were conducted with data from two waves (2011 and 2015) and were restricted to those respondents aged 50 and older and free of functional disability at baseline [n = 5,154, mean age (SD) = 60.72 (7.51); male, 52.3%].

Method
Social isolation, loneliness and covariates were measured at baseline. Follow-up measures of new-onset ADL and IADL disability were obtained 4 years later. We stratified the sample by gender, and then used binary logistic regressions to evaluate the associations between baseline isolation, loneliness and new-onset ADL and IADL disability.

Results
For women, baseline social isolation was significantly associated with new-onset ADL (OR = 1.18, 95% CI = 1.07–1.30) and IADL (OR = 1.11, 95% CI = 1.01–1.21) disability; no significant association between loneliness and ADL or IADL disability was found. For men, neither social isolation nor loneliness was found to be significantly associated with ADL or IADL disability.

Conclusion
This longitudinal study found that social isolation, rather than loneliness, was significantly associated with functional disability over 4 years among women (but not men) in China. These findings expand our knowledge about the association between social relationships and functional status among non-Western populations.
Insights into the importance of areas of climatic stability in the evolution and maintenance of avian diversity in the Mesoamerican dry forests
Authors: Castillo-Chora Vicente De J , Sánchez-González Luis A , Mastretta-Yanes Alicia , Prieto-Torres David A , Navarro-Sigüenza Adolfo G 
Published: November 2020

AbstractWe analysed the phylogeographic structure of five resident bird lineages distributed in the seasonally dry tropical forests (SDTF) of Mesoamerica to test whether they show patterns of synchronous and geographically coincident genetic divergence during the Quaternary. We generated phylogenetic trees, estimated divergence times and analysed the genetic structure of populations (based on sequences of mitochondrial genes), as well as estimating historical distributions (range extension and areas of long-term climate stability) during the Late Pleistocene. We tested and selected the phylogeographic divergence scenarios that best explain the current divergence patterns of taxa using the Approximate Bayesian Computation (ABC) approach. For most species, phylogenetic trees and haplotype networks showed a clear genetic structure associated with geographical distribution. Overall, the divergence times ranged from 0.29–2.0 Mya, suggesting that diversification of populations occurred at different times during the Pleistocene. The palaeodistribution models predicted at least two areas of climatic stability within the current SDTF that probably allowed glacial-interglacial persistence of isolated bird populations along the Mexican Pacific, thus promoting their genetic divergence. The results provide information relevant to the identification of diversification hotspots for the Mesoamerican SDTF avifauna.
New horizons for idiopathic intracranial hypertension: advances and challenges
Authors: Mollan Susan P , Grech Olivia , Alimajstorovic Zerin , Wakerley Benjamin R , Sinclair Alexandra J 
Published: November 2020

Abstract

Introduction
Idiopathic intracranial hypertension (IIH) is becoming a recognized condition due to the increasing incidence linked to a global obesity epidemic.

Sources of data
All English papers on PubMed, Cochrane and Scholar between inception until 1 March 2020 were considered.

Areas of agreement
Studies suggest central adiposity has a pathogenic role. Recent weight gain is a risk factor and weight loss has a key role in management.

Areas of controversy
Interpretation of abnormal lumbar puncture opening pressure is debated. There is an increasing recognition of obesity stigma and how this should be approached.

Growing points
Further evidence is required for the choice of surgical intervention for fulminant IIH. Education regarding IIH should be evidence based.

Areas timely for developing research
Novel research of the pathology of IIH is influencing development of therapies such as glucagon-like peptide-1 receptor agonists and targeting unique androgen signatures. The newly discovered cardiovascular risk requires further attention.
Primary percutaneous coronary intervention without stenting using excimer laser and manual thrombectomy in STEMI with duodenal ulcer perforation: a case report
Authors: Yokoi Hirokazu , Yanagiuchi Takashi , Ushimaru Shunpei , Kato Taku 
Published: November 2020

Abstract

Background
ST-segment elevation myocardial infarction (STEMI) and peptic ulcer perforation are both medical emergencies that require urgent intervention. In case that these time-sensitive medical emergencies present concomitantly, it remains unclear which one should be treated first.

Case summary
An 85-year-old man with melaena, epigastric pain, and severe anaemia was transferred to our emergency department and diagnosed as having inferior STEMI based on electrocardiogram. Emergency coronary angiography (CAG) revealed severe stenosis with thrombus in the proximal right coronary artery. Immediate oesophagogastroduodenoscopy and abdominal computed tomography detected the presence of duodenal ulcer perforation. Primary percutaneous coronary intervention (PCI) without stenting using excimer laser coronary angioplasty and manual thrombectomy was performed under intravascular ultrasound (IVUS) guidance to avoid dual antiplatelet therapy (DAPT). After successful PCI, the perforated viscus was surgically repaired with a laparoscopic omental patch. On Day 7, endoscopic haemostasis treated the oozing of blood from the duodenal ulcer. On Day 21, follow-up CAG and IVUS showed residual stenosis with organized thrombus in the culprit lesion, in which a drug-coated stent was directly implanted. He was discharged with a favourable clinical course on Day 23.

Discussion
We judged that PCI should take precedence over the surgical repair of perforated duodenal ulcer in our case since STEMI was an immediate life-threatening compared to the perforated viscus which had no active exsanguination. Excimer laser coronary angioplasty with manual thrombectomy might be an adequate option to avoid stent deployment and subsequent DAPT in such complex scenarios.
Delayed pulmonary embolism after COVID-19 pneumonia: a case report
Authors: Kanso Mohamad , Cardi Thomas , Marzak Halim , Schatz Alexandre , Faucher Loïc , Grunebaum Lélia , Morel Olivier , Jesel Laurence 
Published: November 2020

Abstract

Background
Since the onset of the COVID-19 pandemic, several cardiovascular manifestations have been described. Among them, venous thromboembolism (VTE) seems to be one of the most frequent, particularly in intensive care unit patients. We report two cases of COVID-19 patients developing acute pulmonary embolism (PE) after discharge from a first hospitalization for pneumonia of moderate severity.

Case summary
Two patients with positive RT-PCR test were initially hospitalized for non-severe COVID-19. Both received standard thromboprophylaxis during the index hospitalization and had no strong predisposing risk factors for VTE. Few days after discharge, they were both readmitted for worsening dyspnoea due to PE. One patient was positive for lupus anticoagulant.

Discussion
Worsening respiratory status in COVID-19 patients must encourage physicians to search for PE since SARS-CoV-2 infection may act as a precipitant risk factor for VTE. Patients may thus require more aggressive and longer thromboprophylaxis after COVID-19 related hospitalization.
An innovative model for management of cardiovascular disease risk factors in the low resource setting of Cambodia
Authors: Nikpour Hernandez Nazaneen , Ismail Samiha , Heang Hen , van Pelt Maurits , Witham Miles D , Davies Justine I 
Published: November 2020

Abstract
Non-communicable diseases are increasing in developing countries and control of diabetes and hypertension is needed to reduce rates of the leading causes of morbidity and mortality, stroke and ischaemic heart disease. We evaluated a programme in Cambodia, financed by a revolving drug fund, which utilizes Peer Educators to manage diabetes and hypertension in the community. We assessed clinical outcomes and retention in the programme. For all people enrolled in the programme between 2007 and 2016, the average change in blood pressure (BP) and percentage with controlled hypertension (BP &lt; 140/&lt;90 mmHg) or diabetes (fasting blood glucose (BG) &lt; 7mg/dl, post-prandial BG &lt; 130 mg/dl, or HBA1C &lt; 7%) was calculated every 6 months from enrolment. Attrition rate in the nth year of enrolment was calculated; associations with loss to follow-up were explored using cox regression. A total of 9139 patients enrolled between January 2007 and March 2016. For all people with hypertension, mean change in systolic and diastolic BP within the first year was −15.1 mmHg (SD 23.6, P &lt; 0.0001) and −8.6 mmHg (SD 14.0, P &lt; 0.0001), respectively. BP control was 50.5% at year 1, peaking at 70.6% at 5.5 years. 41.3% of people with diabetes achieved blood sugar control at 6 months and 44.4% at 6.5 years. An average of 2.3 years [SD 1.9] was spent in programme. Attrition rate within year 1 of enrolment ranged from 29.8% to 61.5% with average of 44.1% [SD 10.3] across 2008–15. Patients with hypertension were more likely to leave the program compared to those with diabetes and males more likely than females. The programme shows a substantial and sustained rate of diabetes and hypertension control for those who remain in the program and could be a model for implementation in other low middle-income settings, however, further work is needed to improve patient retention.
On the development of acoustic descriptors for semi-demersal fish identification to support monitoring stocks
Authors: Domokos Réka 
Published: November 2020

Abstract
Despite worldwide economic importance of lutjanid snappers, there are critical data gaps hindering accurate abundance estimates of these species, thereby impeding stock management efforts. Development of an active acoustics method could fill many of these data gaps, significantly benefiting stock assessment of snapper species that form typically mixed-species assemblages in non-trawlable regions. These methods are well suited for resource surveys but require the ability to derive accurate size estimates from target strength (TS) and the separation of echoes from species within the stock. This work evaluates the feasibility of active acoustics for surveying a Hawaiian bottomfish stock, referred to as the Deep-7 complex, consisting of six species of lutjanid snappers and a single grouper. Acoustic backscatter data and complementary methodologies were used to model TS and develop acoustic descriptors such as aggregation shape, size, and density, individual swimming pattern, distance from bottom, and bottom depth for Deep-7 species. Paired observations of in situ TS and fork length (FL) gave an estimated bulk relationship of 23.01·log10(FL)–72.18. The success of 25 accuracy tests indicates the effectiveness of the developed echo allocation parameters. Preliminary results imply that acoustics could be successfully used to monitor Deep-7 with broader applicability upon adapting methodology to other regions.