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Due to the Covid-19 pandemic, traditional teacher-centered teaching has been replaced with learner-centered teaching models. The flipped classroom model has been considered effective by the researchers in the circumstance in which both teachers and students are not able to be present in physical classrooms...

This research using a descriptive qualitative approach. The object of research is the cash on delivery payment method for online shopping transactions, research locations in Indonesia with limited data sampling in Lhokseumawe City and North Aceh. Data collection is carried out by observation, interviews...

The increased cancer burden globally, from 12.7 million new cases in 2008 to a predicted 22.2 million in 2030, makes cancer a critical global problem with high unmet medical needs. Hepatocellular carcinoma (HCC) is the fifth most frequently diagnosed cancer worldwide, and HCC is the third leading cause...

Adolescent mental health problems have a proportion of up to 16% of the total burden of disease for people aged 10-19 years in the world. Various studies suggest that lack of sleep in adolescents can affect poor academic performance and the emergence of mental health problems such as depression. This...

Digital technologies, including the Internet, mobile technologies and devices, data analytics, artificial intelligence, digital services and applications, are changing agriculture and the food system. And also must have a solid legal basis. Examples abound at different stages of the agri-food value chain:...

This study analyses the relationship between Chinese Yuan Renminbi, US Dollar, Australian Dollar, and Euro exchange-rate to Rupiah using the Vector-Autoregression (VAR) method from January 2017 to December 2019. The results of this study show that each variable has a good correlation in long and short-term....

Measuring the flexibility of the red chilli supply chain is very necessary to determine how flexible the supply chain is to changes and fluctuation that may be faced by each red chilli supply chain actor in Panjatan District. The purpose of this studyis to describe the structure of supply chain relationships...

In this paper we have tried to present an alternative approach for two discrete distributions such as Binomial and Multinomial with a new concept of sampling having a more general form apart from the traditional methods of sampling. The existing distributions may be obtained as a special case of our...

A recent paper by Karasu (Kalkanli) and Yildirim (Journal of Nonlinear Mathematical Physics 9 (2002) 475-482) presented a study of the Kepler-Ermakov system in the context of determining the form of an arbitrary function in the system which was compatible with the presence of the sl(2, R) algebra characteristic...

If a classical r-matrix r is skewsymmetric, its quantization R can lose the skewsymmetry property. Even when R is skewsymmetric, it may not be unique.

We study symmetries of the real Maxwell-Bloch equations. We give a Lax pair, biHamiltonian formulations and we find a symplectic realization of the system. We have also constructed a hierarchy of master symmetries which is used to generate nonlinear Poisson brackets. In addition we have calculated the...

Rota-Baxter operators or relations were introduced to solve certain analytic and com- binatorial problems and then applied to many fields in mathematics and mathematical physics. In this paper, we commence to study the Rota-Baxter operators of weight zero on pre-Lie algebras. Such operators satisfy (the...

In some tourism destinations, tourists are offered or sometimes required to wear traditional local clothing as part of a tourism gimmick or as part of respect for the place. This idea is not implemented in other appropriate sites. This study explores the attitude of tourists towards wearing traditional...

Affected by the acceleration of urbanization, a large number of rural labour forces have flowed out. The “empty villages” are accompanied by the idleness of rural land and obstacles to improving land utilization. This article uses a semi-structured interview method to take village D in S city as an example....

Application energy-efficient for air conditioning equipment are the main indicators of the energy conservation and sustainability in Heating, Ventilating, and Air Conditioning (HVAC) systems. The heat recovery is one of the methods of energy savings and optimization. The present work aims to compare...

Populus Euphratica is a haloduric desert vegetation growing in arid regions. It is a drought-enduring plant and it is also a wind barrier to fix sands in desert areas. The distribution of Populus Euphratica forest is required to carry out the management of water resources in the arid region, such characteristics...

Nucleoside analogs have been shown to have mitochondrial toxicity. In vitro tests can evaluate the mechanisms and severity of the toxicity. Tenofovir dipivoxil fumarate (TDF) is a novel drug for type B hepatitis. In this study, HK-2 cells were used to evaluate the effect of TDF on mitochondrial toxicity...

Prestressed reinforcement technology has been widely used in Slope Engineering, but anchor prestress losses still lack a comprehensive systematic understanding. Through systematic monitoring and data analysis of prestressed anchors in the slope of a sandy slate, discussion on the Slope Prestress Loss...

This paper integrates the binary search algorithm and the load flow calculation to find the position and the injection capacity of the PV grid-connected injection node, it bases on minimizing the transmission loss and enhancing the voltage of the end. As verified by the IEEE33 node distribution system,...

With the rapid development of network and information technology, intelligent terminal system is used in many fields. Intelligent terminal system based on Android operation system for distance learning is developed and introduced in the paper. The hardware and software design is given, and the effect...

The network performance of UAV airborne is closely relied on the movement of the mobile nodes which is decided by the mobility mode. And the selection of mobility model and its parameters is of great significance to the simulation results. Based on the three-dimensional Gauss Markova mobility model (3D-GMM),...

Nowadays image recognition technology is widely used, and plays a very important in various fields. Deep learning technology uses multilayer structure to analyze and deal with image features, which can improve the performance of image recognition. The popular models of deep learning contain AutoEncoder,...

A camera distortion model calibration method based on orientation points was proposed. This method needs to fix calibration plate on the measuring platform, and image sequences were obtained applying a calibration plate with five orientation points. The ellipse detection criteria are applied to eliminate...

College students read classics, can inherit the spirit of national culture, and cultivate a sound personality and noble moral feelings. In this paper, students in four colleges and universities in Jilin Province as the sample, using the method of questionnaire, analyzes the classic reading of contemporary...

This paper introduced the spontaneous regulation and global regulation based more collaboration virtual machine memory management structure for the multimedia teaching in college English teaching, analyzed the most important assurance for dynamic deployment and security isolation for the infrastructure...

To research the water temperature cumulative effect of the power station cascade development, taking the upper reaches of the Yellow River from Ningmute to Maerdang as an example. In the paper, the water temperature impact evaluating indicator was used, combined with three-dimensional model to simulate...

a new idea about the emergency platform application mode– Emergency-cloud was putting forward based on the status of emergency platform in china. The feasibility of construct it was analyzed and the architecture of the Emergency-cloud was built from bottom to up.at last, the features of the application...

This paper introduces a concept of Gray Zones of world politics as a useful analytical instrument for understanding new trends in contemporary world politics. It has also applied significance. It could be used for formulation and implementation of foreign and security policy in areas and in dimensions...

Collaborative filtering method have been widely used in the recommender system which has problems of scalability and highly time consuming between the process of recommendation and traditional method didn’t concern over the difference of time that a user has rating for an item. In this paper, we proposed...

In order to resolve the conflict among multiple aircrafts, a method to get the optimal route quickly and accurately based on genetic algorithm is proposed. By applying genetic algorithm, the conflict is resolved between two aircrafts as well as among multi-planes. An optimization method to accelerate...

The population migration is a major feature of the development of human and social change. It relates to political, economic and cultural, as well as concerning the city modernization, industrialization, and many other factors. From 60's of the twentieth Century, the Japanese migrated from rural to urban...

In order to meet the demand of reform and development of higher education in the new situation, a new professional connotation promotion pattern of information management and information system, namely five-in-one ,is constructed systematically from the following aspects: optimizing personnel training...

the new business paradigm in the information era takes openness, transparence, sharing and responsibility as a fundamental principle. Acting as the subject of the new business paradigm, the issues concerned about sustainable development of e-businessman has become the hotspot of attention by academia....

This is an educational art by designing teaching situations cleverly to improve teaching effectiveness. It has many advantages in politics class. Politics teachers can use a variety of materials cleverly to create teaching situation. In order to create a valuable teaching situation, teachers must master...

Self-organization and limited energy are two features of wireless sensor network. This paper proposes a practice topology control algorithm for wireless sensor network based on adding backup node and hidden link in traditional topology tree. Because of the HRP(Hierarchical Routing Protocol), build links...

This paper studied the generate and application of the renewable energy of the electric car. In the study, it is found that the potential energy generated from the Back EMF voltage of a vehicle's electric motor via heat loss, can be used to recharge the battery and therefore recover energy for higher...

With the development of the society and the improvement of the living standard, people are to pursue more clean, healthy and harmonious living environment. And the trash management is one of the important factors. The aim of this paper is to design an intelligent trash bin monitoring system to improve...

Big data are widely used today, whether and how to use big data in economic variables forecast has become a new field of economic research. The equipment manufacturing industry is the foundation of the national economic development, so forecasts the development of equipment manufacturing industry is...

Objective: to study the electronic soft ureter mirror joint qin laser lithotripsy in the treatment of renal calyx calculi under safety and effectiveness.Methods: our hospital in March 2016 - March 2017 electronic soft ureter mirror qin laser lithotripsy under 40 patients under the treatment of renal...

This research aimed to find out the ways to build the students' characters through extracurricular activities at elementary schools in Jakarta, Indonesia. This survey study was conducted at 63 elementary schools in Jakarta, Indonesia. Data collection was done through interviewing and observing. Building...

Because of the influence of displacement of oil storage tank after tank capacity table, the paper presents a new tank capacity calculation method, it has a higher accuracy and lower computational complexity, we set up a mathematical model (integral model and median model) to determine the variable parameters....

In order to get good weather resistance, water repellency, and thermal stability of emulsion lattices, the present work aimed to prepare Quaternary Co-polymer Emulsion, therefore, a conventional seeded emulsion polymerization is prepared by (NH4)2S2O8-initiation and by core/shell technique of four monomers...

In order to realize the tacit knowledge management in library information consulting service, starting from the concept of tacit knowledge management and the types and contents of tacit knowledge in libraries, the necessity for tacit knowledge management in the library information advisory services was...

Dynamic model of 4X4 vehicle was researched in this article, the mass,damping and stiffness matrices were deduced through lagrange theorem. On the other hand, model transfer function was got by fourier transform of differential equations, after that, random excitation coherence function of 4 wheels and...

With the increasing requirements of inter-disciplinary talents in the market economy, many university students choose to pursue the study of “Major + English” dual-degree. The paper firstly analyzes the present situation of teaching and studying of “Major + English” dual-degree in Chinese universities....

The ES-U3160 reinforced fabrics with toughening function were prepared by adhering the Ex-situ elasticizer polyethersulphone homogeneously on reinforced fabrics according to Ex-situ toughening technology. Composites were prepared by RTM process taking U3160 and ES-U3160 fabrics as reinforcement. The...

Mapping of the social differentiations of student at any educational institution is very important in order to have a comprehensive data of them. The comprehensive data would be beneficial for the institution concerned to formulate policies related to solve student provlems and needs. Three main questions...

The corona discharge of EHV transmission lines in high altitude area is very serious. Based on the Jiantang-Yulong 500kV power transmission project, we using Ansys software to calculate the surface electric field of 500 kV double circuit AC transmission line insulator and fittings. We get the voltage...

Purpose product base design should focus on teaching students observation skills, analytical skills and ability to think through the training system, so that students master the basic modeling capabilities and a variety of expression methods for the future of the professional courses of study as well...

In this paper, the R-function theory(RFT) is applied to solve the f bending problem of slip clamped shallow spherical shell. Firstly the fundamental solution of the biharmonic operator, the boundary equation and the R-function are used to construct the quasi-Green's function. Then the model governing...