bluuebunny/crossref_metadata_2025_split huggingface dataset:
RETRACTED: Study on the Mixed English Teaching Model in Higher Vocational Colleges Under the Background of Big Data
Authors: Zhang Tianhua 
Published: April 2021

Abstract
This paper selects the reform of English course teaching mode in higher vocational colleges(HVC) as the research object, and studies how to make full use of big data(BD) technology to build a teaching platform to integrate teaching resources. In addition, we analyze the learning behavior of students and predict student learning effects. On this basis, a diversified and mixed English teaching mode in HVC is constructed, which enriches the theory of higher vocational English teaching and promotes the continuous improvement of the quality of higher vocational English teaching. What’s more, it ensures that students’ English ability is fully exercised and better adapted to the future society.
Big Data Technology and Deep Learning Algorithm in Civil Engineering Teaching
Authors: Yu Zhihua 
Published: April 2021

Abstract
The advent of the era of big data is driving changes in teaching methods. This research mainly discusses the application of big data technology and deep learning algorithm in civil engineering teaching. From the perspective of students, provide guidance on learning and life, pass on the experience summary of graduating students to school students for reference, and combine real-time school data to provide real-time guidance to school students. From the perspective of faculty and staff, we can understand the basic situation of students in a short time to achieve the purpose of improving teaching quality. Teachers should choose and determine the teaching support based on the knowledge and skills that the civil engineering students have mastered, combined with the teaching content. School teachers need to improve their understanding of problems, pay attention to creating various problem scenarios for students, promote the collision of multiple thinking processes, and cultivate students’ creative thinking and ability. In the process of evaluating whether students can use the visual method of knowledge to memorize new knowledge, the average evaluation value is between 2.5-3. This research is helpful to promote the reform of civil engineering teaching.
Safety Risk Analysis and Prevention and Control Countermeasures of Petroleum Enterprises under the Background of Intelligent Era
Authors: Zhang Xuming 
Published: April 2021

Abstract
In the age of the Internet and other new technology under the background, this article analyzed the risk sources of petroleum enterprise with the background both at home and abroad, discusses the era of big data. The public security organs should be known how to use intelligent systems, cloud computing, video technology, unmanned aerial vehicles, 5G technology, new technology such as mobile phone monitoring method for the prevention and control technology, in order to effectively deal with all kinds of petroleum enterprise emergencies, and then maximum early to make predictions, using intelligent control technology to strengthen the security risk prevention and control in the field of petroleum enterprise, which become passive to active work mode, implement the public security organ for dangerous goods and manage wisdom leapfrog development.
Application of Virtual Reality Technology (VR) in Practice Teaching of Sports Rehabilitation Major
Authors: Fang Man , You Fan , Yao Rongqi 
Published: April 2021

Abstract
Patients who can receive rehabilitation training provide two types of feedback. This is the biggest advantage of virtual reality technology for rehabilitation training, and at the same time can improve the patient’s perception of rehabilitation results. This article aims to study the application of virtual reality technology (vr) in sports rehabilitation professional practice teaching. This paper uses the research method of virtual scene position mapping. The virtual scene position mapping is based on the virtual realization technology of upper limb rehabilitation training, which is manipulated by the movement of the patient’s upper limbs. In the experiment, all the students in the first and second classes of a sports rehabilitation major in a local university were subjected to theoretical tests and practical ability assessments to all the students in the first and second classes of the sports rehabilitation major. Experimental data shows that the excellent rate and passing rate of the experimental class’s practical ability test are much higher than those of the control class. Therefore, it can be concluded that the application of virtual reality technology to sports rehabilitation teaching is beneficial to the improvement of learners’ practical ability. The experimental results show that the test excellence rate of the experimental class is 24.2% higher than that of the control class, and the passing rate is 12% higher. Therefore, applying virtual reality technology to sports rehabilitation education can stimulate people’s interest in learning. The virtual environment is very similar to the real world, and the motor skills learned in the virtual environment can be successfully transferred to the real world.
RETRACTED: Research on the Integration of Innovation and Entrepreneurship and Ideological and Political Courses in Universities under the Background of Internet Era
Authors: Lin Nan , Lin Yanqing 
Published: April 2021

Abstract
With the progress of the times, China’s higher education has entered a new era. The combination of innovation and entrepreneurship education with college students’ ideological and political education is an important means for colleges and universities to implement morality, cultivate talents and serve the society. Therefore, while colleges and universities attach importance to entrepreneurship education, it has important practical significance to further strengthen ideological education.Through the analysis of the essential meaning of “curriculum ideological and political”, this article points out the importance of combining ideological and political education with college students’ innovation and entrepreneurship, and analyzes the main problems in the implementation of curriculum ideological and political concepts in college innovation and entrepreneurship education courses.
Capacitance Measuring Instrument Based On Ldc1612
Authors: Huang Jian 
Published: April 2021

Abstract
A new type of capacitance measuring instrument includes a microprocessor, a capacitance sensing sensor, a LC oscillation circuit, a computer, a display and a buzzer. The LC oscillation circuit is connected with the measured capacitance CS to generate an oscillation frequency, and the oscillation frequency is sent to the capacitance sensing sensor. After being processed by the capacitance sensing sensor, it is converted into a 28 bit binary number and sent to the said controller through the IIC interface When a successful measurement is completed, the microprocessor controls the buzzer to sound once and sends the measurement results to the display or computer, which has the advantages of high precision, short measurement time, etc.
Innovation Path of Internet Enterprise Business Model Based on E-commerce
Authors: He Jiangnan , Yin Xiaoyin 
Published: April 2021

Abstract
In recent years, with the rapid development of China’s Internet information industry, in this environment, the e-commerce economy has also obtained a lot of room for development. The active development of e-commerce has promoted the rapid development of my country’s national economy to a large extent. Since 2015, China’s e-commerce economy has begun a new development path. “With the holding of large shopping festivals such as “Double Eleven” and “Double Twelfth”, people began to realize the convenience of e-commerce. With the rapid increase in the transaction volume of electronic platforms such as Tmall, it has brought people to their daily lives. The great convenience has laid the foundation for the economic development of e-commerce. This article studies the innovation of e-commerce through the business model of Internet companies. Through the business model of Internet companies, what are the plans for some electronic trading platforms? According to Alibaba’s announcement, according to the data, sales of Tmall’s “Double Eleven” this year were 498.2 billion yuan, a record high once again. In contrast, according to official data released by http://JD.com, from 0:00 on November 1 to 2020. As of 23:59 on November 11, JD’s 11.11 global love season’s cumulative order volume exceeded 271.5 billion yuan, setting a new record again. At 0:00,http://Suning.com released a full battle report from November 1 to 11. At 23:59, double 11 online orders increased by 75%. It can be seen that the business models of various Internet companies use specific time to launch sales activities, which is the innovative path of e-commerce.
Capability-Based Poverty Reduction in Deep-Poor Areas Based on Big Data-- a Case Study of J County, Liangshan Prefecture, Sichuan Province
Authors: Sang Wanqing , Guo Xiaoming 
Published: April 2021

Abstract
As the key area of poverty alleviation, the poverty problem is still serious, the problem of poverty alleviation is not sustainable, and the causes and manifestations of poverty are interwoven, it is more difficult to solve the problem of poverty because of the lack of endogenous development ability of the poor population, including the “demand” of seeking development and the “ability” of realizing demand. Therefore, this paper takes j county of Liangshan Prefecture in Sichuan Province as the object of investigation, and uses the theory of Amartya Sen to analyze the relationship between the capability of the poor population and poverty, the basic survival and development, productive capacity and development capacity of the poverty-stricken population all affect their poverty and are the factors that can not be ignored to achieve sustainable poverty eradication in the deep-poverty areas.
Relationship between Residential Area Distribution and Terrain Factors
Authors: Chen Xin , Wang Zhicheng 
Published: April 2021

Abstract
Taking residential area as the research object, combined with variable dimension fractal theory, the influence degree of different terrain gradient of elevation, slope and aspect on the number distribution of residential area is studied. The results show that: there are three order cumulative and variable dimension fractal distribution characteristics between the number of residential area distribution and elevation, and the second-order cumulative and variable dimensional fractal distribution between the number of residential area distribution and slope aspect and slope. The influence degree of each topographical factor on the number distribution of residential areas from high to low is slope aspect > slope > elevation.
RETRACTED: Under the Background of Big Data, Information-Based Teaching has Great Influence on the Development of College Students’ Employability
Authors: Yi Cuijuan 
Published: April 2021

Abstract
College students are an important human resource and an important driving force for China’s social and economic development. With the continuous expansion of the scale of college enrollment nationwide, college education has changed from “elite” to “mass”, and the employment mode of college students has changed, and they are also facing the change of employment management functions. How to better guide and help graduates to find jobs is an urgent problem to be solved. This paper mainly studies the influence of information-based teaching on the development of college students’ employability under the background of big data. Through questionnaire survey, this paper has collected various data of fresh college graduates from different educational levels and professional backgrounds and conducted data processing and data analysis. The experimental results show that in the study on the impact of information education on college students’ employability, 24.1% of the variance can be explained, and the independent variable ACTS on college students’ employability and is not affected by the controlled variable. The regression coefficients of information education were 0.213 and 0.209 respectively, both reaching the significance level. Information education has a significant positive effect on college students’ employability.
Realization Mechanism of School-Family-Community Sports Integration Model in the Network Age
Authors: Wang Fubin , Huang Qiong 
Published: April 2021

Abstract
In the publicity process, it is done jointly by establishing a We Chat public account, using online platforms and community bulletin boards, and promoting the development of community student sports activities by improving residents’ sports awareness. Parent sports school is a form composed of parent members to spread sports knowledge. Invite school medical staff or community health security personnel to teach parents how to maintain a good lifestyle. Help parents to acquire correct educational concepts and scientific methods for children’s physical education. Parents’ sports schools can carry out activities that suit them according to local conditions. Schools are built on the community, teachers and community managers can increase communication to make better use of community public resources, and at the same time enhance the community’s participation in sports activities and encourage others to participate in sports. In the social network publicity methods, 22.9% have sports information publicity, and 77.1% have no network publicity. This research is helpful to the further promotion of sports.
Nanophotosensitizers for cancer therapy: a promising technology?
Authors: dos Santos Ancély Ferreira , Arini Gabriel S , de Almeida Daria Raquel Queiroz , Labriola Leticia 
Published: April 2021

Abstract
Photodynamic therapy (PDT) has been clinically applied to cure various diseases including cancer. Indeed, photophrin (porfimer sodium, Axcan Pharma, Montreal, Canada), a heterogenous mixture of porphyrins, was the first photosensitizer (PS) approved for the treatment of human bladder cancer in 1993 in Canada. Over the past 10 years the use of PDT in the treatment of benign and malignant lesions has increased dramatically. However, PDT is still considered as an adjuvant strategy due to its limitations, primarily including low tissue penetration by light and inaccurate lesion selectivity by the PSs. To overcome this scenario, new technologies and approaches including nanotechnology have been incorporated into the concept of PS formulations as PS delivery systems, as PSs per se or as energy transducers. The ideal nanophotosensitizer (NPS) for cancer therapy should possess the following characteristics: biocompatibility and biodegradability without toxicity, stability in physiological conditions, tumor specific targeting, strong near infrared absorption for efficient and sufficient light absorbance and large singlet oxygen quantum yield for PDT. To fulfill these requirements, several nanoscale delivery platforms and materials have been developed. In this review we will focus on the state of the art of nanotechnology contributions to the optimization of PDT as a therapeutic alternative to fight against cancer. For this purpose we will start from the basic concepts of PDT, discuss the versatility in terms of NPS formulations and how to tackle the deficiencies of the current therapy. We also give our critical view and suggest recommendations for improving future research on this area.
Rapid ionization of Xe/Ar mixtures in nanosecond discharges exploiting post-pulse field reversals
Authors: Kim H Y , Gołkowski M , Harid V 
Published: April 2021

Abstract
Enhanced post-pulse electric field reversals of Ar, Xe, and XeAr mixture gases in capacitively coupled nanosecond discharges are investigated with Particle-In-Cell simulations in the context of maximizing electron density. The electric field reversal occurs at the falling edge of the voltage pulse and induces electron oscillatory movement in the plasma bulk region. The amplitude of field reversals is affected by driven voltage and the ratio of bulk length to gap distance. Exploiting the field reversal with a so called Plasma frequency dependent Square Wave (PSW) in an optimal gas mixture leads to the highest electron density. Specifically, for a 250 V PSW XeAr mixture case, the electron density is 2.2 times higher compared to a 1 kV DC pure Xe case even if the driven voltage is 4 times less than DC voltage. In 250 V PSW cases, XeAr mixture plasma has 1.2 times higher average electron density and 1.2 times electron temperature in the sheath region than a pure Xe plasma. With a narrower bulk region, the XeAr plasma has an enhanced field reversal and this leads to higher and faster growing electron density and electron temperature than a Xe plasma. For applications using Xe plasmas, XeAr mixture plasmas with PSW can be exploited for high electron density and temperature at reduced costs.
An insight into the toughness modulus enhancement of high-performance knotted microfibers through the correspondence analysis
Authors: Berardo Alice , Pantano Maria F , Pugno Nicola M 
Published: April 2021

Abstract
A variety of applications, spanning from structural or biomedical engineering to flexible electronics, require the development of materials able to withstand high load and, at the same time, accommodate high strain before failure. While strength and toughness are often self-excluding properties in man-made materials, they can be efficiently combined by nature, which provides source of inspiration for novel materials design. Herein this paper, we pursue a bio-inspired approach, based on the introduction of a mechanical sink, such as a running knot, to improve the toughness modulus of high-performance polymeric microfibres. These are then enriched with additional smart features, such as a viscoelastic coating, surface roughening or a combination of those, to amplify the beneficial effect of the knot introduction. The role played by all such features on the mechanical performances of the prepared fibre samples, namely load at failure and toughness modulus increase, is then evaluated through a statistical technique, known as correspondence analysis (CA). While this exploratory analysis is widely adopted in biology, ecology, neuroscience or genetics, applications in structural or mechanical engineering are still rare. Here, we show that CA can be a powerful tool for the design of materials provided with enhanced toughness without losing strength.
Predicting the duration of chaotic transients in excitable media
Authors: Aron Marcel , Lilienkamp Thomas , Luther Stefan , Parlitz Ulrich 
Published: April 2021

Abstract
The spatiotemporal dynamics of excitable media may exhibit chaotic transients. We investigate this transient chaos in the 2D Fenton–Karma model describing the propagation of electrical excitation waves in cardiac tissue and compute the average duration of chaotic transients in dependence on model parameter values. Furthermore, other characteristics like the dominant frequency, the size of the excitable gap, pseudo ECGs, the number of phase singularities and parameters characterizing the action potential duration restitution curve are determined and it is shown that these quantities can be used to predict the average transient time using polynomial regression.
TIMEx: tumor-immune microenvironment deconvolution web-portal for bulk transcriptomics using pan-cancer scRNA-seq signatures
Authors: Xie Mengyu , Lee Kyubum , Lockhart John H , Cukras Scott D , Carvajal Rodrigo , Beg Amer A , Flores Elsa R , Teng Mingxiang , Chung Christine H , Tan Aik Choon 
Published: April 2021

Abstract

Summary
The heterogeneous cell types of the tumor-immune microenvironment (TIME) play key roles in determining cancer progression, metastasis and response to treatment. We report the development of TIMEx, a novel TIME deconvolution method emphasizing on estimating infiltrating immune cells for bulk transcriptomics using pan-cancer single-cell RNA-seq signatures. We also implemented a comprehensive, user-friendly web-portal for users to evaluate TIMEx and other deconvolution methods with bulk transcriptomic profiles.

Availability and implementation
TIMEx web-portal is freely accessible at http://timex.moffitt.org.

Supplementary information
Supplementary data are available at Bioinformatics online.
Application of Tandem Dispersive Liquid–Liquid Microextraction as an Efficient Method for Preconcentration of Two Antidepressant Drugs in Real Samples Combined with High Performance Liquid Chromatography
Authors: Arabkhani Bahare , Goudarzi Nasser , Bagherian Ghadamali , Chamjangali Mansour Arab 
Published: April 2021

Abstract
In the present work, tandem dispersive liquid–liquid microextraction (TDLLME) coupled with liquid chromatography was used for the determination of the two antidepressant drugs citalopram (CIT) and sertraline (SER) in complicated matrices. Indeed, the present approach was used to improve the suitability and appropriateness of the dispersive liquid–liquid microextraction (DLLME) method in complicated matrices. Firstly, 10 mL of the sample solution containing the two understudied drugs was extracted into an organic solvent (200 μL of 1,2-dichloromethane) using the DLLME method. Then the extracted analytes were back-extracted into 100 μL of an aqueous acceptor phase. The total extraction time of this method is about 6 min. To achieve the best efficiency for this method, efficient parameters like the kind and volume of the organic solvent and the effect of the ionic strength on the effectiveness of extraction were reviewed and improved. Under the optimized experimental conditions, TDLLME showed good linearity in the range of 100.0–7000.0 ng mL−1. The limits of detection were found to be 10.0 ng mL−1 for CIT and 2.0 ng mL−1 for SER. The relative standard deviation (RSD) is obtained in the range of 0.7–4.1%.
Association between new-onset right bundle branch block and primary or secondary ventricular fibrillation in ST-segment elevation myocardial infarction
Authors: Galcerá-Jornet Emilio , Consuegra-Sánchez Luciano , Galcerá-Tomás José , Melgarejo-Moreno Antonio , Gimeno-Blanes Juan Ramón , Jaulent-Huertas Leticia , Wasniewski Samantha , de Gea-García José , Vicente-Gilabert Marta , Padilla-Serrano Antonio 
Published: April 2021

Abstract

Aims
New-onset right bundle branch block (RBBB) in myocardial infarction (MI) is often associated with ventricular fibrillation (VF) but the nature of this relationship has not been determined.

Methods and results
Between 1998 and 2014, among other data, incidence and duration of RBBB and VF occurrence were prospectively collected in 5301 patients with ST-segment elevation MI (STEMI) admitted to two University Hospitals in Murcia (Spain). Multinomial adjusted logistic regression analyses were used to examine the association between RBBB, attending to its duration, and VF according to its primary VF (PVF) or secondary VF (SVF) character. Among 284 (5.4%) patients with new-onset RBBB, 158 were transient and 126 permanent. VF occurred in 339 (6.4%) patients, 201 PVF and 138 SVF, documented within the first 2 h of symptoms-onset in 78% and 60%, respectively. New-onset RBBB was more frequent in PVF (11.4%) and SVF (20.3%), than in non-VF (4.7%). Transient RBBB incidence was higher in PVF (9.0%) and SVF (9.4) than in non-VF (2.6%), whereas permanent RBBB was higher in SVF (10.9%) than PVF (2.5%) and non-VF (2.1%). New-onset RBBB 1.83 [95% confidence interval (CI): 1.07–3.11] and new-onset transient RBBB 2.39 (95% CI: 1.32–4.32) were independently associated with PVF. New-onset 3.03 (95% CI: 1.83–5.02), transient 2.40 (95% CI: 1.27–4.55), and permanent 2.99 (95% CI: 1.52–5.86) RBBB were independently associated with SVF.

Conclusion
New-onset RBBB and VF in STEMI are independently associated and show particularities based on the duration of the conduction disturbance and/or the primary or secondary character of the arrhythmia.