bluuebunny/crossref_metadata_2025 huggingface dataset:
Physical characterization of S169: a prototypical IR bubble associated with the massive star-forming region IRAS 12326-6245
Authors: Duronea N. U. , Cichowolski S. , Bronfman L. , Mendoza E. , Finger R. , Suad L. A. , Corti M. , Reynoso E. M.
Published: December 2020

Aims. With the aim of studying the physical properties of Galactic IR bubbles and to explore their impact in massive star formation, we present a study of the IR bubble S169, associated with the massive star forming region IRAS 12326-6245.

Methods. We used CO (2–1),13CO (2–1), C18O (2–1), HCN (3–2), and HCO+ (3–2) line data obtained with the APEX telescope using the on-the-fly full sampling technique to study the properties of the molecular gas in the nebula and the IRAS source. To analyze the properties and distribution of the dust, we made use of images obtained from the IRAC-GLIMPSE, Herschel, and ATLASGAL archives. The properties of the ionized gas in the nebula were studied using radio continuum and Hα images obtained from the SUMSS survey and SuperCOSMOS database, respectively. In our search for stellar and protostellar objects in the region, we used point source calalogs obtained from the MSX, WISE, GLIMPSE, 2MASS, AAVSO, ASCC-2.5V3, and GAIA databases.

Results. The new APEX observations allowed us to identify three molecular components, each one associated with different regions of the nebula, namely: at −39 km s−1 (component A), −25 km s−1 (component B), and −17 km s−1 (component C). Component A is shown to be the most dense and clumpy. Six molecular condensations (MC1 to MC6) were identified in this component, with MC3 (the densest and more massive one) being the molecular counterpart of IRAS 12326-6245. For this source, we estimated an H2 column density up to 8 × 1023 cm−2. An LTE analysis of the high density tracer lines HCO+ (3–2) and HCN (3–2) on this source, assuming 50 and 150 K, respectively, indicates column densities of N(HCO+) = (5.2 ± 0.1) × 1013 cm−2 and N(HCN) = (1.9 ± 0.5) × 1014 cm−2. To explain the morphology and velocity of components A, B, and C, we propose a simple model consisting of a partially complete semisphere-like structure expanding at ~12 km s−1. The introduction of this model has led to a discussion about the distance to both S169 and IRAS 12326-6245, which was estimated to be ~2 kpc. Several candidate YSOs were identified, projected mostly onto the molecular condensations MC3, MC4, and MC5, which indicates that the star-formation process is very active at the borders of the nebula. A comparison between observable and modeled parameters was not enough to discern whether the collect-and-collapse mechanism is acting at the edge of S169. However, other processes such as radiative-driven implosion or even a combination of both mechanisms, namely, collect-and-collapse and radiative-driven implosion, could be acting simultaneously in the region.
Does NGC 6397 contain an intermediate-mass black hole or a more diffuse inner subcluster?
Authors: Vitral Eduardo , Mamon Gary A.
Published: December 2020

We analyze proper motions from the Hubble Space Telescope (HST) and the second Gaia data release along with line-of-sight velocities from the MUSE spectrograph to detect imprints of an intermediate-mass black hole (IMBH) in the center of the nearby, core-collapsed, globular cluster NGC 6397. For this, we use the new MAMPOSST-PM Bayesian mass-modeling code, along with updated estimates of the surface density profile of NGC 6397. We consider different priors on velocity anisotropy and on the size of the central mass, and we also separate the stars into components of different mean mass to allow for mass segregation. The velocity ellipsoid is very isotropic throughout the cluster, as expected in post-core collapsed clusters subject to as strong a Galactic tidal field as NGC 6397. There is strong evidence for a central dark component of 0.8 to 2% of the total mass of the cluster. However, we find robust evidence disfavoring a central IMBH in NGC 6397, preferring instead a diffuse dark inner subcluster of unresolved objects with a total mass of 1000 to 2000 M⊙, half of which is concentrated within 6 arcsec (2% of the stellar effective radius). These results require the combination of HST and Gaia data: HST for the inner diagnostics and Gaia for the outer surface density and velocity anisotropy profiles. The small effective radius of the diffuse dark component suggests that it is composed of compact stars (white dwarfs and neutron stars) and stellar-mass black holes, whose inner locations are caused by dynamical friction given their high progenitor masses. We show that stellar-mass black holes should dominate the mass of this diffuse dark component, unless more than 25% escape from the cluster. Their mergers in the cores of core-collapsed globular clusters could be an important source of the gravitational wave events detected by LIGO.
The Basque – Cantabrian Pyrenees: report of data analysis
Authors: Miró Jordi , Muñoz Josep A. , Manatschal Gianreto , Roca Eduard
Published: December 2020

This contribution presents the analysis of a data set that was put together in the PhD thesis of Jordi Miró which is part of the OROGEN Project. The Basque – Cantabrian Pyrenees, that are the focus of this report, have been extensively studied over the last years. Several open debates in the Earth Science community aroused from this realm regarding the formation and reactivation of rift domains and formation of fold and thrust belts. This report summarizes the main tectonic models proposed to explain both the extension and reactivation history over this area and compile a series of data to consider for further discussions and interpretations. This report includes a thematic map of the Basque – Cantabrian Pyrenees showing an analysis of the tectono-stratigraphic evolution of the area. The map covers an area of more than 33 000 km2 and is a graphic representation of the geology of the region based on a large geodatabase including previous published maps and field observations. A composite reflection seismic line crossing the entire Basque – Cantabrian Pyrenees from the Ebro foreland basin to the offshore Landes High is also presented. This section enables to present a continuous dataset along the entire area with the projection of few drill holes, which are presented with the stratigraphic logs following the same tectono-stratigraphic legend obtained from the previous analysis. The main goal of this data report is to provide a coherent and complete dataset to the community, which enables to propose, discuss and test some of the new concepts related to the formation and reactivation of rifted margins. This data report is complementary to the contributions of Lescoutre and Manatschal (2020) and Cadenas et al. (in prep) that are part of the same special volume.
Normal forms for the endpoint map near nice singular curves for rank-two distributions
Authors: Agrachev Andrei A. , Boarotto Francesco
Published: December 2020

Given a rank-two sub-Riemannian structure (M, Δ) and a point x0 ∈ M, a singular curve is a critical point of the endpoint map F : γ ↦ γ (1) defined on the space of horizontal curves starting at x0. The typical least degenerate singular curves of these structures are called regular singular curves; they are nice if their endpoint is not conjugate along γ. The main goal of this paper is to show that locally around a nice singular curve γ, once we choose a suitable topology on the control space we can find a normal form for the endpoint map, in which F writes essentially as a sum of a linear map and a quadratic form. This is a preparation for a forthcoming generalization of the Morse theory to rank-two sub-Riemannian structures.
Gas comprehensive prevention and control technology and practice in outburst mine
Authors: Gao Hong
Published: December 2020

In view of the present situation of gas occurrence in Xiaoxi coal industry, combined with the problems of high gas pressure, high content and complex geological structure in the gas control, the comprehensive gas prevention and control technology to meet the mining connection is proposed.It mainly includes the pre drainage measures of underground kilometer drill hole, through layer drilling and bedding drilling, comprehensive gas prevention technology of surface well pre drainage of coal seam gas and underground cross layer drilling area outburst prevention. The practice shows that after the implementation of comprehensive gas control measures, the residual gas content and gas pressure of coal seam are greatly reduced, and the gas control effect is remarkable. Through the comprehensive gas control technology of outburst mine, the gas control level of Xiaoxi coal industry has been significantly improved, and the number of times of gas overrun has decreased year by year.
Numerical simulation study on the influence of pulverized coal particle size on boiler combustion characteristics
Authors: Cheng Zhihai , Li Yang , Zhang Zhonghan
Published: December 2020

The influence of pulverized coal particle size on combustion and NOx formation of 660MW tangential combustion ultra-supercritical boiler in a power plant was studied by using commercial software FLUENT. The average particle size of pulverized coal was set at 61μm, 71μm and 80μm, respectively. The results show that with the decrease of pulverized coal particle size, the overall temperature level of the boiler increases, the average temperature of the main combustion zone increases, the temperature of the upper part of the main combustion zone decreases, and the combustion of pulverized coal is more incomplete. However, the probability of particles sticking to the wall and the probability of coking and slagging of the boiler increases. The amount of NOx produced in the main combustion zone decreases, while the amount of NOx produced in the upper part of the main combustion zone increases, while the overall amount of NOx produced increases slightly.
Marketing Segmentation in Consumer Product Industry
Authors: Zhao Xuan
Published: December 2020

Marketing segmentation is widely used for targeting a smaller group of market in consumer product industry, and is useful for decision makers to effectively focus on their consumers’ purchasing behavior based on one marketing mix. In order to have a better understanding of the relationship between marketing segmentation in conventional business field and data science field, marketing segmentation is introduced from the perspectives of business and data science in this paper. In addition, on the basis of the introduction of both methods, conclusion can be drawn that data science methods are used in marketing segmentation as an assistance to present more precise output, based on the theory generated in business practice.
Research on Financial Risks of Robo-Advisor Platforms
Authors: Liu Ruilin
Published: December 2020

With the vigorous development of China’s Internet finance and financial technology, Roboadvisors have become more and more popular among investors. This new investment and financial management model that relies on Internet platforms, artificial intelligence, quantitative trading technologies will have a greater impact on the capital market once the financial risks caused. How to standardize the Robo-advisory platform, effectively control the financial risks in the investment process and protect the interests of investors is an urgent problem in the Robo-advisory industry. Firstly, this article analyzes the development status of domestic Robo-advisory platforms. Then it puts forward suggestions on how the Robo-advisory industry can face the dual pressures of survival and profit in the context of stricter supervision by analyzing various financial risks and causes of the platform. It aims to promote the sound development of the investment advisory market in the context of financial technology.
Research on Investment Structure of Voltage Level Supporting High Quality Development
Authors: Lu Shengwei , Zhou Ming , Wu Qiang , Jin Sha , Yan Jiong , Sang Zixia
Published: December 2020

In order to deal with the severe external supervision and challenges, and improve the scientific rationality of internal investment structure decision-making, this study explored the idea of voltage level investment structure decision-making considering the power grid development and operation benefits. Firstly, based on the study of the relationship between historical investment scale and power grid indicators, the investment demand of power grid is determined; secondly, the influence path of investment on business efficiency is sorted out, and the differences of investment, capital transfer and depreciation of different voltage levels are studied and determined, and the operation benefit level of the company under different investment schemes is calculated. Finally, the index system of investment structure optimization is constructed to quantify the power grid and benefit status of the company under different investment structures, so as to optimize the company’s investment scheme and promote the high-quality development of the company and power grid.
Rapid Economic Development May Contribute Little to Healthcare in China Data analysis and indications of healthcare resources’ availability and distribution in China
Authors: Chen Yifei
Published: December 2020

In the past several decades, China has experienced huge economic development. However, whether healthcare, as a crucial factor of social welfare, has also been improved is arguable. This essay conducts data analysis to assess the relationship between economic development and healthcare from two sides, whether the available healthcare resources have been expanded and whether the distribution of healthcare has been more reasonable, supported by results from data analysis process (regression) and size of Gini coefficient based on population and geographical area respectively.
Dynamic Game and Simulation Analysis in Railway Technical Regulation Supervision
Authors: Han Fuqiang , Li Chengcheng , Xie Xiang
Published: December 2020

In order to discuss the factors that affect the regulation behavior of railway technical regulations and perfect the regulation mode, a game model with CRG, railway bureau and railway station as the main body of regulation is constructed. The results show that the intensity and cost of rewards and punishments have an impact on the railway technical regulations and supervision system.
Research on the Application of Financial and Taxation Big Data in Enterprise Taxation Risk Management
Authors: Zhang Min
Published: December 2020

At present, it is an important period for the comprehensive deepening of China’s economic system. Enterprises will generate a large amount of fiscal and taxation data in production. Traditional financial management methods no longer meet the needs of current social development. It is necessary to integrate big data and Internet of Things technology to make it clear and establish an effective risk assessment mechanism to ensure the stable development. The article will mainly discuss the application research of fiscal and taxation big data in enterprises taxation risk management.
Economic Growth, Income Distribution and Building a Modern Economic System
Authors: Zha Tingjun
Published: December 2020

This paper first sorts out the existing research results between economic growth and income distribution; further, through macro data from the export-oriented mechanism of labor-intensive products, the capital owner’s interest-biased distribution mechanism, urban-rural dual structure and department Interrevenue distribution and other aspects explore the difference in income distribution between factors and its relationship with economic growth. Secondly, this paper analyzes the internal relationship between the income distribution structure and the construction of modern economic system from efficiency mechanism, fair mechanism and coordination mechanism. Finally, combined with the actual situation of China’s economic growth, give the policy recommendations of optimizing the income distribution structure are proposed to promote the construction of modern economic system.
Future Development Trends of REITs in Mainland China
Authors: Ma Xiaoli
Published: December 2020

REITs, as unconventional real estate financial tools, are considered to be the most advanced productivity representatives in the real estate industry. With the issuance of the “Notice on Promoting the Pilot Work of Real Estate Investment Trusts (REITs) in the Infrastructure Sector”, the establishment of China’s real estate investment trusts (REITs) market has become a frontier issue that academia, real estate and financial industries are most concerned about. This article mainly uses the comparison method to analyze the average return rate, FFO growth rate and dividend rate of US and Singapore REITs from 2019 to September 2020. The study found that: when the COVID-19 pandemic and the overall economic environment is unstable, all REITs have varying degrees of negative impact, especially for hotel REITs and retail REITs, the adverse impact is more serious, and the adverse impact on logistics REITs and digital computer room REITs is small. The results show that US and Singapore REITs can better resist risks by adopting the diversified portfolio theory. Based on the comparison of the performance of US and Singapore REITs, this study suggests the future of China: First, pay more attention to the central and western regions and thirdand fourth-tier cities to achieve geographic diversification; second, pay attention to the bright future of logistics REITs and new infrastructure REITs.
Commercial Value and service innovation management of Lahos elders in the Internet age
Authors: Zhao Mingxiao
Published: December 2020

Lahos elders are outperformers among the old population, featuring good physical conditions, new ideas and strong consumption power. In the Internet age, Lahos elders boast tremendous market potential, and it is a focus of the old age market to grasp the market opportunities, explore consumption features, enrich the content of services and innovate on the service management modes. Lahos elders have large consumption needs, set store by socializing activities, and pursue quality in consumption. Innovative services that are characterized by mutual help, convenience, enrichment, education and sharing will become a dominating trend of the old age market.
Design of intelligent temperature control system for parking vehicle based on solar energy
Authors: Liu Xiaomin , Tang Jie , Wang Zhaoming
Published: December 2020

Because of the high summer temperature, after the vehicle parking, the interior temperature increased sharply. It can make the vehicle interior parts easy to age, and release harmful gases. While the driver can’t adapt to high temperature when enter to the vehicle again. The interior high temperature is a threat to human’s health. In order to reduce the temperature inside the vehicle, this paper designed a solar-based intelligent temperature control system. After the vehicle’s engine stops working, it can monitor the temperature inside the vehicle in real time, and can reduce the temperature to the appropriate temperature when the temperature is too high. The system has the advantages of simple structure, convenient use, no need to modify the vehicle and so on. After the real vehicle test, the effect of reducing the heat accumulation in the vehicle can be achieved.
Research on Power Grid Investment Assistant Decision Model Adapting to Power Reform Situation
Authors: Wan Yidi , Xie Wei , Du Haihong , Pan Wenming , Li Jianqing , Zhu Xiaohu
Published: December 2020

in order to thoroughly implement the new energy security strategy of “four revolutions and one cooperation”, meet the requirements of power grid planning and management of energy administration, realize the strategic objectives of State Grid Corporation of China, actively respond to the severe external economic situation, alleviate the impact of policy-based price reduction, and improve the performance of internal investment management, the company needs scientific front-end decision-making, improve the efficiency of investment decision-making, scientifically determine the investment scale, structure and timing, and play a strategic leading role in investment decision-making. Through the analysis of internal and external management requirements, this paper constructs an auxiliary decision-making model of power grid investment to support the determination of investment scale, structure and time sequence, to realize the reasonable investment scale calculation of provincial companies, the calculation of investment structure of different voltage levels and the optimization of project delivery under the condition of given investment scale, which comprehensively considers the external supervision, economic development and internal management objectives, so as to assist the prior investment decision-making, improve the input-output efficiency, effectively improve the Advisory decision-making ability of investment data, and meet the company’s investment decision-making needs.
COVID-19’s Pathways to Human Central Nervous System and Relevant Drug Treatment
Authors: Liang Zhaolun
Published: December 2020

COVID-19, also known as Severe Acute Respiratory Syndrome-Coronavirus 2 (SARS-CoV2), is a severe disease. It can cause different types of symptoms including shortness of breath, fever, cough, fatigue and sore throat. Older adults and people who have severe underlying medical conditions like heart or lung disease or diabetes seem to be at higher risk to develop more complex complications due to the infection. Until August 6th, 2020, COVID-19 has caused 700, 000 deaths across the Earth; however, the actual death number could be higher than 700,000. COVID-19’s origin is still remained unknown, but the speculation is targeted to bats or pangolins. Although COVID-19 is a disease target human’s respiratory system, based on the research and clinical cases of COVID-19, evidence shows that COVID-19 can also invade human’s central nervous system (CNS).
Influence of curing age on high-temperature properties of additive manufactured geopolymer mortar
Authors: Yin Xiaohong , Wang Xiaodong , Fang Yuan , Ding Zhu
Published: December 2020

Some researches have been conducted on the application of geopolymer in 3D printing. However, there is no publication about the high-temperature properties of 3D printed geopolymer made from fly ash, slag, and metakaolin. This paper presents the experimental research on the mechanical properties of 3D printed geopolymer after being exposed to elevated empratures. The effects of curing age on high-temperature properties are analyzed. The heating temperasures were 300 °C, 600 °C, and 900 °C, and the holding time was one hour. After exposure to temperatures, the flexural strength of 3D printed geopolymer exhibited different change trends with increasing curing age for different exposure temperatures. Before and after exposure to elevated temperature, the 3D printed geopolymer experienced significant anisotropic compressive strengths. The change trends of compressive strength at different exposure temperatures wit hincreasing curing ages were different from each other on different loading directions.
The Impact of the 2019-nCoV on the Oral Medical Industry and the Corresponding Strategies
Authors: Chen Yanbing
Published: December 2020

The outbreak of new crown pneumonia has had a great impact on Chinese enterprises. As a highly market-oriented medical vertical segment industry, oral institutions have been impacted and affected unprecedentedly in this epidemic. Through the analysis of the specific impact on the stomatology industry, this paper puts forward and its countermeasures, and provides suggestions for enterprises to eliminate the negative impact of the epidemic on enterprises to the greatest extent and promote the benign development of enterprises.
Formula Development and Application of Wall Protection Slurry for Long-distance Horizontal Freezing Boreholes and Thorough Piles
Authors: Jiang Guojing , Zhou Xiaomin , Li Fangzheng , Gao Wei , Sun Jianrong , Han Yufu , Yang Zhigang
Published: December 2020

Since complex barriers need to be passed through during the process of drilling long-distance horizontal freezing boreholes, the stability of the borehole wall at the soft and hard stratum interface is the key in controlling the deflection of the horizontal boreholes. The author puts forward to establishing the stability mechanical model of horizontal freezing borehole walls with fluid loss as the control index, starting from the stability mechanism of horizontal freezing boreholes and combined with the working conditions of horizontal freezing boreholes; selects two optimal fluid loss additives from the perspective of the molecular structure of bentonite materials, and determines the optimal formula by formulation optimization by virtue of orthogonal tests; applies the optimal formula into the long-distance pile and borehole penetration test, and validates the reliability of wall protection slurry formula materials for horizontal boreholes via comparing the water loss and soil erosion at the pile interface and analyzing the deflection rules, which is of certain value in engineering promotion and application.
Functional Analysis of Childhood BMI based on Simplicial Band Depth
Authors: Ren Yutong
Published: December 2020

This paper mainly studied the relationship between obesity and BMI. BMI is the ratio of height to weight and measures a person’s health. In this paper, height and weight data of obese children from 2 to 18 years old in local hospitals were collected. The linear regression method was used to find the correlation between BMI and children’s health degree, and the regression curve between age and BMI was plotted. This paper supplemented the vacancy of BMI study on children, and a complete BMI curve could be obtained for each child according to the curve, so as to predict possible health problems of children in advance.
Non-coding RNA model improves prognostic prediction in patients with nephroblastoma
Authors: Sun Jingzhu , Geng Zezheng , Liu Naiwen , Fang Xiaonan
Published: December 2020

Background. Nephroblastoma (Wilms tumor) is a common abdominal malignancy in children, ranking second among abdominal malignancies in children, but the pathogenesis is still unclear, and further research on their molecular mechanisms is needed.

Method. We obtained lncRNA expression and clinical data from the TARGET database of the GDC data portal of the American Cancer Institute. Effective patient samples were determined based on gene differential expression analysis and clinical data screening. The risk calculation model was established by univariate and multivariate Cox regression analysis, after which the samples were divided into training group and test group to predict the prognosis of patients with nephroblastoma, and then the independent validation on gender was carried out for all samples. Finally, the corresponding target genes of lncRNA were predicted for functional enrichment analysis to explore the enrichment of genes and the interaction between them.

Result. 125 valid samples were identified after screening 136 samples. After experimental analysis, five significant lncRNAs (AC004233.3, AC055764.1, SCAT8, LINC02623, AL118505.1) associated with the prognosis of nephroblastoma were found and validated. The area under the curve (AUC) of the receiver operating characteristic (ROC) curve on the test set was 0.732, which indicated that the model was accurate and the independence verification had good discrimination. In the enrichment analysis, we can intuitively see the significant situation and promotion or inhibition of genes. It can be inferred that the experimental five lncRNAs may regulate the expression of related protein-coding genes and the production process of nephroblastoma, thus affecting the relevant pathways of cancer development.

Conclusions. This study systematically analyzed the lncRNA expression and clinical data of patients with nephroblastoma. The data obtained by establishing Cox proportional hazard regression model can further understand the molecular mechanism related to nephroblastoma and play an auxiliary role in the clinical diagnosis of doctors, thereby improving the diagnosis, treatment and prognosis of patients with nephroblastoma.
The symptoms and treatment of Zika virus infection
Authors: Zheng Siyi
Published: December 2020

Zika virus is an arbovirus of the Flaviviridae family that causes a mosquito-borne disease. The infection can cause devastating complications among individuals in all age ranges, such as microcephaly in infants and Guillain-Barre syndrome in adults. Its teratogenic potential and explosive epidemics has already caused a panic and is a public health emergency. This review puts emphasis on the current acknowledge of the transmission, clinical characteristics, pathogenic mechanism, and treatment of Zika virus infection, and the future expectation to this disease as well.
Construction of Mental Health Education System in Higher Vocational Colleges Based on Web Platform
Authors: Hu Yan
Published: December 2020

This article combines the principles of constructing a health system based on the Web platform to discuss the relevant content of the Web platform technology. The principles of constructing a health system based on the Web platform include the principle of teaching students in accordance with their aptitude, the principle of taking students as the main body, the principle of god effectiveness in achieving goals, and the principle of initiative task. The author studied the system construction elements such as overall system design, functional module design, database module design, interactive platform module design, and resource sharing platform design. The purpose of this article is to improve the application effect of the health system based on the Web platform and improve the mental health of students in higher vocational colleges.
How COVID-19 impacts the U.S. economy and predictions about the future
Authors: Tian Fangze
Published: December 2020

The spread of COVID-19 is one of the most impactful global events in recent years. It has destroyed the U.S. economy and financial market. In just several months, the stock market experienced major fluctuations, the entire economy has basically stopped, and the unemployment rate peaked. Its severity even penetrated people’s daily lives; many are not getting basic requirements needed for survival. As cases increase daily, more and more are concerned with how the future will look like and what this pandemic will do to the economy in the long run. Faced with many uncertainties in macroeconomic trends and the continuous spreading of the virus, I have compared this current crisis with the subprime mortgage crisis in 2008. With a goal to reasonably forecast future developments of the U.S. economy, from both micro and macro perspectives, financial market trends and government actions have been analyzed. Specifically, the two events’ causes, essences, policies’ effectiveness, and other factors have been evaluated and suggestions in adjusting government policies have also been made. Unlike the 2008 crisis, this crisis will require longer, more complex, and more flexible processes and regulations to recover, and citizens should be prepared for this slow recovery. But overall, a promising outlook for the U.S. economy still stands in the long-run.
Research on Copyright Protection of Computer Games
Authors: Deng Xiang Hua , Liu Dan
Published: December 2020

With the development of the Internet economy, computer games have developed rapidly in recent years. At the same time, with the increasing prosperity of computer games, many infringement problems have also arisen. The concept and classification of computer games and computer game live broadcasts, as well as computer game screens and computer game live broadcasts need to be distinguished. The article lists common problems in the computer game live broadcast industry, which are mainly manifested in the unclear copyright identification and attribution of computer game live broadcasts, and the unclear legal status of the relevant subjects in the computer game live broadcast. It is concluded that whether the computer game live broadcast is a work needs to be specifically defined in conjunction with the live broadcast content. And further put forward suggestions to improve my country’s related protection system of computer game copyright, and promote the development of computer game live broadcast industry.
Research on the Impact of Air Pollution on the Real Estate Market-Take Shanghai’s Residential Commercial Housing Market as an Example
Authors: Li Yajing
Published: December 2020

Based on urban economics, behavioural economics and western economics theory, we analysed the effects of air pollution on the real estate market through VAR model and IRF using the AQI and the residential commercial housing market data from January 1, 2015 to June 30, 2020. We found that there is intrinsic link between changes in air pollution levels and changes in real estate market. When air pollution levels increase, it will have a sustained inhibitory effect on housing price and housing turnover. The effect on housing price will last about 5 months and the effect on housing turnover will last about 2 months. After having a comparative analysis of the IRF of the average price in six jurisdictions in Shanghai we found that inhibitory effect which air pollution impact on real estate market has different forms of expression. Residents in areas with relatively poor air quality are more willing to pay for clean air and housing transactions in areas with relatively good air quality are more sensitive to air pollution.
The study of characteristics through biomass burning
Authors: Zhang Dan , Yan Ruyue , Xiao Lizhi , Wei Xin , Zhu Baoyu , Li Na
Published: December 2020

As a major agricultural province in China, Northeast China produces a lot of biomass while its grain yield is high. Open burning is an efficient and convenient way to remove biomass. However, air pollutants (PM2.5, CO, VOCs) will be released in the process of biomass combustion, which will have a certain impact on Regional Environmental quality, atmospheric visibility and human health. Because of the various type of biomass, their combustion products and effects are different. In this study, there collected peanut hull, rice husk, straw and wood particles, and carried out the simulated combustion experiment in the laboratory environment simulation chamber. The inorganic elements, water-soluble ions and speciation analysis of combustion products were determined. The results showed that the content of Zn was higher than that of carcinogenic element in the eight inorganic elements after combustion. The water-soluble ion emission factors of wheat straw and wood particles are larger than those of peanut hull and rice husk, and the water-soluble ions are mainly K+and CL. Through the morphology analysis of combustion products, it can be seen that different types of biomass have different morphology after combustion, which are mainly strip, column and particle. Combined with energy spectrum analysis, it is found that the content of K and CL is high. The results lay a theoretical foundation for the study of local biomass combustion and provide data for the determination of local biomass combustion emission characteristics.
Research on the Protection and Inheritance of Opera Art in Linchuan Area Based on the Effectiveness Analysis of Witch Elements in Big Data Era
Authors: Chen Ying
Published: December 2020

Opera art, which is a cultural symbol and life memory of a nation and a region, is the cultural root of people’s homesickness, which combines various artistic elements such as excellent music, dance and poetry of the Chinese nation. Witchcraft custom, which has appeared since the primitive human period, is a series of activities made by human beings to try to explain some phenomena in daily life, and to predict, influence and control the development of implementation objects with the help of illusory supernatural forces. Witches and artists have the same line of thinking-similar social identity, state in action and functions. Get the wizard thinking characteristics of the artist, and how the artist, a stealth wizard, makes the works show the same effect as witchcraft ceremony. From the perspective of big data, this paper analyzes the protection and inheritance of opera art in Linchuan area based on the effectiveness of witchcraft elements, and examines the limitations of traditional means to protect and develop opera art, aiming at protecting and inheriting the inherent folk culture of the Chinese nation.
Research on Beidou and GPS dual satellite positioning algorithms for substation site positioning
Authors: Feng Junjie , Shi Junfeng , Gao Lei , Huang Hongwei
Published: December 2020

With the rapid development of global satellite navigation system technology, multi-mode satellite navigation positioning technology that can be compatible with multiple navigation systems at the same time is bound to become the future development trend. Compared with the single-mode navigation system, the multi-mode navigation system has many advantages, such as a large number of visible stars, a wide coverage, high positioning accuracy, and good reliability. Based on this, this paper applies Beidou and GPS dual-satellite positioning algorithms in substations and studies its key technologies. Specifically, with the aid of MATLAB to solve the Beidou double satellite positioning, GPS positioning results, and the big dipper, GPS double satellite positioning in two times, four times, eight times more weight under the condition of coordinate values and the actual coordinates on the x, y, and z axes deviation were compared. The results pointed out that GPS and Beidou double satellite single point positioning effect would be different under different weights. Therefore, in the actual positioning, the positioning effect of the algorithm can be improved by adjusting the weight. In order to test the feasibility of the proposed Beidou and GPS dual satellite positioning algorithms, positioning experiments were carried out, and the results were compared with the single satellite positioning results. The results showed that the curves of Beidou and GPS dual satellite positioning algorithms were highly fitting to the actual curves, confirming the feasibility of the proposed algorithm. This study aims to improve the accuracy and efficiency of substation positioning and navigation for the development of domestic power transformation.
Oils rich in alpha linolenic acid: chemical composition of perilla (Perilla frutescens) seed oil
Authors: Bondioli Paolo , Folegatti Liliana , Rovellini Pierangela
Published: December 2020

In this paper, the main chemical properties of Perilla seed oil (PO) obtained by mechanical pressing of Perilla seeds are reported. The analysis of fatty acid composition has highlighted a very high amount of (n-3) α-linolenic acid (ALA), more than 60%, higher than other ALA rich oils such as linseed and sacha inchi oils and similar to chia oil. PO has an important sterol (higher than 3000 mg/kg) and vitamin E (approx. 870 mg/kg) content, while biophenols are in quite low concentration. The analyzed sample showed a very low acid and peroxide value and this is the demonstration that, following the proper technological procedures, it is possible to obtain high quality oils even in presence of high α-linolenic acid concentrations.
Review of operational indications on the design of facilities for radiopharmaceutical manufacturing in italy
Authors: D’Avanzo M.A. , Contessa G.M. , Cocomello G. , Mattozzi M. , Pacilio M. , Sandri S. , Campanella F.
Published: December 2020

Purpose. In this article, the authors propose useful operational indications to approach in the best possible way the issues concerning the design of a facility for manufacturing radiopharmaceuticals, with focus on organizational and safety aspects. Methods. Several documents produced by authoritative bodies, national and international scientific institutions and associations were examined and referenced, to the purpose of reviewing all available information in the field. Results. Indications are gathered for the design stage, including the organization of accesses and routes and characteristics and requirements of premises and systems. Conclusions. Main goal is to guide the reader in evaluating and choosing the most suitable features and equipment to limit the risks due to ionizing radiation and to prevent contamination of the workers and the environment.
Monoarticular synovitis of knee: dealing with the dilemma
Authors: Goyal Tarun , Paul Souvik , Kundu Choudhury Arghya , Kalonia Tushar
Published: December 2020

Introduction: Chronic synovitis involving a single large joint remains a diagnostic dilemma. We present 61 cases of chronic synovitis of the knee, followed prospectively for 2 years. The study focuses on the diagnosis, management, and histopathological correlation. Methods: We prospectively studied 61 patients with chronic mono-articular synovitis of the knee joint, between July 2016 and September 2017. All patients underwent plain radiographs, magnetic resonance imaging, and arthroscopic examination with synovial biopsy. Further treatment was based on findings of histopathological examination. Results: The average duration of symptoms was 7.72 ± 4.34 months. The mean age at presentation was 29.93 ± 15.56 years. Results of histopathological examination showed chronic nonspecific inflammation in 28 patients (46%), features suggesting tubercular infection in 19 patients (31%), pigmented villonodular synovitis in seven patients (11.5%), rheumatoid arthritis in three (5%) patients, acute inflammation in three (5%) patients and findings suggestive of synovial chondromatosis in one (1.5%) patient. Treatment was based on histopathological results. Intra-articular injections of methylprednisolone (80 mg depot preparation) were given to all patients with nonspecific synovitis and rheumatoid arthritis. Anti-tubercular treatment was started for patients with tubercular synovitis. Complete arthroscopic/open synovectomy followed by radiotherapy was carried out for patients with pigmented villonodular synovitis. Non-steroidal anti-inflammatory drugs are used for patients with acute on chronic inflammation. All patients had symptomatic relief and functional improvement in further follow-up. Discussion: Histopathological reporting remains the mainstay for diagnosis. The various differentials should always be kept in mind when approaching patients with chronic mono-articular synovitis. Specific treatment can be started once the diagnosis is confirmed.
Diagnostik und Therapie von Tremorsyndromen
Authors: Bârlescu Lavinia A. , Kassubek Jan
Published: December 2020

Tremor ist die häufigste Bewegungsstörung und kann isoliert, im Rahmen von neurologischen Erkrankungen sowie im Rahmen von Erkrankungen anderer Fachgebiete oder auch als Folge von Medikamenten auftreten. Die Vielfalt der klinischen Präsentation, der Ätiologie und der Therapie macht die kontinuierliche Weiterentwicklung der klinischen diagnostischen und therapeutischen Konzepte notwendig. Dieser Beitrag stellt den aktuellen Stand der praxisbezogenen Kenntnisse und Empfehlungen vor.
Synthetic Studies on Cyclocitrinol: Construction of the ABC Ring System Based on Epoxy–Nitrile Cyclization
Authors: Tanino Keiji , Sato Kazuto
Published: December 2020

The stereoselective synthesis of a model compound containing the ABC ring system of cyclocitrinol was accomplished. After connecting a C ring allyltitanium segment with an A ring bi­cyclo[4.1.0]heptanone segment, the seven-membered B ring moiety was constructed by an intramolecular cyclization reaction of an epoxy nitrile. The enone moiety was introduced through an oxidative decyanation reaction, and the bicyclo[4.4.1]undecane skeleton with the highly strained olefin moiety was formed through a ring-opening reaction of the bicyclo[4.1.0]heptane substructure.
Aortic Rupture during Endovascular Aneurysm Repair. Report of Our Experience and Review of the Literature
Authors: Moulakakis Konstantinos G. , Lazaris Andreas M. , Kakisis John D. , Sfyroeras George S. , Theocharopoulos George , Panagiotopoulos Andreas I. , Krinos Nikolas , Geroulakos George
Published: December 2020

Background Aortic neck wall rupture during endovascular repair of abdominal aortic aneurysms (EVAR) is an underreported potentially fatal complication. Only a few cases have been reported. The main cause of this complication is repeated attempts at balloon inflation or overdilation to treat an intraoperative Type 1a endoleak. We report three cases complicated by procedure-related aortic neck wall rupture during EVAR. We also review the literature regarding the causes and outcomes of this complication.

Methods Medical records of all patients undergoing EVAR between January 2009 and March 2019 were retrospectively reviewed.

Results Overall, 824 EVAR procedures were performed, and rupture of the aortic neck wall was observed in three patients. In all cases, a Type 1a endoleak was observed and, in all cases, repeated ballooning attempts had been performed to resolve the endoleaks. In all cases, conversion to open repair was performed and all patients survived.

Conclusion In cases of Type 1a endoleak, a maximum of two ballooning attempts should be performed even if a Type 1a endoleak persists. In case of intraoperative aortic neck wall rupture, control of the hemorrhage should be achieved immediately by advancing the balloon above the site of rupture. Emergency surgical conversion in case of hemodynamic stability is the first choice. According to the literature, emergency surgical conversion, especially in cases of endograft with suprarenal fixation, is associated with significant morbidity and mortality rates, mainly due to hemorrhage and to the length of the procedure required to repair the aortic neck wall injury.
Effects of water adsorption on conductive filaments of a Ta2O5 atomic switch investigated by nondestructive electrical measurements
Authors: Aiba A. , Kaneko S. , Tsuruoka T. , Terabe K. , Kiguchi M. , Nishino T.
Published: December 2020

Atomic switches based on a metal/oxide/metal structure have attracted considerable attention for application in nonvolatile switching memory devices. In atomic switches, the formation and rupture of atomic-scale conductive metal filaments can be controlled via an applied voltage, which is central to the optimization of the resistive switching of such switches. Because the high-resistance (OFF) state is determined by the previous rupture (RESET) process and affects the subsequent formation process, it is important to know the filament structure and the electronic states in the OFF state. However, direct observation of the structure and electronic states is exceedingly difficult in the case of filaments embedded in the oxide matrix. In this paper, we propose a nondestructive methodology to evaluate the filament structure and electronic states in the OFF state based on current–voltage measurements. Using this method, the OFF states of a Ag/Ta2O5/Pt atomic switch were characterized, and changes in the size and potential barrier of a ruptured filament were estimated according to the introduction and evacuation of water molecules. The results clarify the effects of moisture, which are important for the operation of oxide-based resistive memories under ambient conditions.