Bilingual Publishing Co. (BPC): E-Journals
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3D Simulation of Battery Fire on a Large Steel Frame Structure due to Depleted Battery Piles
No full textLithium ion batteries (LIB) can rupture and result in thermal runaway and battery fires. In the process of transporting lithium ion batteries using trains, the massive collection of batteries can cause train fire and pose significant danger to the public. This is especially critical when the fire occurs amid a heavily populated metropolitan environment. This paper reports the 3D analysis of a warehouse with possible train fire due to LIB rupture and the fire propagation at a rail yard. Six critical fire cases with the battery train in close vicinity to the warehouse were considered. The six fire cases are the worst-case scenarios of a Monte Carlo simulation of different fire cases that may occur to an actual steel storage facility at the Capital Railyard, Raleigh, North Carolina. A 3D finite element (FE) frame model was constructed for the steel warehouse and the most critical fire cases were simulated. The results indicated that several structural components of the warehouse would experience large stresses and deflections during the simulated battery fires and resulting in instability to the structure. Specifically, members of the roof frame represent the most critical elements and that the members can result in large deformations as early as 4 minutes after the fire starts. Furthermore, effective utilization of fire protection can delay somewhat the fire effects and extend time to failure to 45 minutes and in one of the simulated cases, prevent structural instability. Thus, fire from LIB waste transport using train is a very realistic problem due to the thermal runaway, and the analysis performed in current study can be used as a preventive investigation technique for buildings that may be exposed to the train fire risk
A Review of the Studies on Ideological and Political Elements in Translation
No full textIn recent years, in order to implement the educational concept of fostering virtue and naturing students’ quality comprehensively, ideological and political research has sprung up. The research on ideological and political elements in translation has also made new progress, and many academic results have been achieved one after another. These achievements reflect the appearance of integrating ideological and political elements in translation. Through the inventory of relevant papers, the paper analyzes the research status and existing problems of ideological and political elements in translation, and forecasts the research trend, to provide some references for subsequent related research
A Study on the Mechanism of Cohort Effect on the Formation of National Identity among College Students
No full textThe lack of subjective awareness of national identity among young people is a common phenomenon in all countries. In this paper, we investigate the role of cohort effect in the formation of national identity among college students based on the theory of cohort effect. The results of the empirical study show that at the current stage, the formation of national identity within the group of Chinese college students mainly relies on the herding mechanism, followed by the competition mechanism and then the learning mechanism
Analysis on the Approach of College Students’ Innovation and Entrepreneurship Education under the New Media Environment
No full textWith the steady rise of China’s economy, new media technology is gradually applied in various industries, giving enterprises more possibilities and opportunities. Compared with other entrepreneurs, college students with broad knowledge and novel ideas can better adapt to the changing market environment. In order to bring new vitality to all walks of life and deal with the dilemma of college students’ employment, colleges and universities must pay attention to the improvement and cultivation of students’ ability to innovate and start their own businesses. This paper will analyze the current situation of innovation and entrepreneurship education in colleges and universities under the background of new media, and look for effective innovative ways and methods
Thoracic Endovascular Aortic Repair for Type B Aortic Dissection
No full textThe incidence of aortic dissection (AD) is estimated to be 1 in 100,000 per year. The onset and progression of AD are rapid. Failure to receive appropriate treatment might lead to death in a short time. Even following active treatment, patients might develop low cardiac output syndrome, severe infection, and hemorrhage, which lead to death. Interventional therapy is a surgical method that has been widely used in Stanford type B AD recently. It is characterized by minimal invasiveness, low incidence of postoperative complications, and low cost. This article will review the interventional treatments for AD and will guide the selection of treatment options
A Brief Review on Fundamentals of Conductive Polymer (CPs)
No full textPolymers are huge compounds made up of numerous monomers (repeatedsubunits). They have similar macro and micro properties, as well aselectrical transport qualities, semiconductive capabilities, and opticalfeatures. With the advent of conductive polyacetylene, conductivepolymers have gotten a lot of interest. These conductors have a wide rangeof electrical conductivity, which may be produced by doping, while beingmechanically flexible and having a high thermal stability. Polymers may becreated using a variety of methods, including chemical and electrochemicalpolymerization. With advancement in material stability and greaterproperty control, an increasing variety of new applications are now beinginvestigated
Thermomechanical and Flow Analysis of a Typical Truck Radiator Using PTC-Creo
No full textIn automobile engines, it is commonly known that the proper removal of the excess heat, resulted from internal combustion, is of high significance in the prevention of numerous negative consequences. In this regard, the radiator has a pivotal role as the main component of the engine’s cooling system. Hence, its design and analysis are highly important, requiring more comprehensive failure and flow investigations. In this work, a Scania radiator is examined under the thermal and mechanical loads, followed by its analysis under the combined thermomechanical loading. Then, the flow characteristics, including the velocity, pressure, and enthalpy, are studied. In this regard, PTC-Creo software is utilized. The results demonstrate that the thermal stress causes seven times more displacement than the mechanical one. When they are combined, this value reaches 1.5 mm. Also, the maximum failure index value of the Tresca theory is around 4.58, observed at the inlet side of the radiator. Besides, this paper indicates that the PTC-Creo can be considered as a reliable and economical tool for simulation of industrial applications, such as the considered radiator of a heavy-duty cooling system
A Typical Sublithospheric Mantle beneath the Tello Region, SE-Ngaoundéré (Cameroon Line)
No full textPeridotite xenoliths, raised to the surface by alkaline basalts or kimberlites,provide us direct information on the processes and composition of the upper mantle. They are the major source of information on the state of stress,pressure and temperature in the deep mantle. They are thus a source of petrological and geochemical information that is generally not available on the Earth’s surface. Fresh spinel-lherzolite xenoliths exhibit a protogranular components of the Tello volcano. The Tello is the continental sector of the Cameroon Line, located in the South East of the town of Ngaoundéré at 75 km approximately between (N7° 13’, N7° 14’) and (E13° 40’ and E13° 60’). Minerals’ composition of the xenoliths is ~64% olivine, ~24% orthopyroxene, ~11% clinopyroxene and ~1% spinel. Significant variation in (Cr/Cr + Al) of the system shows the reciprocal nature of the spinel solution.The Tello spinel lherzolites show internal chemical homogeneity and represent a normal upper mantle. Their mineral chemistries suggest equilibrium condition of 830° - 925° and 1.4 GPa-2.3 GPa. These data suggest that there is good correlation bracket between increasing activity of Al2O3 and decreasing of practionning of TiO2 into spinel. The AlIV and AlVI contents vary by 0.05-0.2 and 0.03-0.2 respectively. The majority of samples caracterise the lithospheric mantle
Bearing Capacity of Defective Reinforced Concrete Pile in Sand-model Study
No full textConcrete piles that were poorly constructed or analyzed in their soil analyses may have structural or geotechnical defects. To examine such defects, an experimental study was conducted to investigate how a defective reinforced concrete pile behaved. These piles were installed and subjected to a compression axial load in the sand that had relative densities of 30%,60%, and 80%. The tests were performed using four concrete model piles: one intact pile and the other three piles had a structural defect (necking) at three different positions of the pile at (0.25 L from the top, center, and 0.25 L bottom). Geotechnical defect (soft layer or debris) was studied using Styrofoam layer at various vertical distances under the pile toe with Y/D = (0, 0.5, 1 and 1.5) D. The test results showed that the bearing capacity of the structural defect was the most in the case of a neck at 0.25 L from the bottom, followed by a neck at the center, and finally a neck at 0.25 L from the top. In the case of a geotechnical defect, the bearing capacity of the pile decreased with the decrease of the vertical distance between the soft layer and the pile toe
Modeling of Mechanisms Providing the Overall Control of Human Circulation
No full textMultiple humoral and nervous mechanisms, each influencing the cardiovascular system (CVS) with its specific dynamics and power, had been evolutionarily saved both in animals and in human organisms. Most of such mechanisms are considered to be controllers of CVS’s function, but there is no concept clearly explaining the interaction of global and local controllers in intact human organisms under physiological or pathological conditions. Methodological and ethical constraints create practically insuperable obstacles while experiments on animals mainly concern artificial situations with certain switched-of mechanisms. Currently, mathematical modeling and computer simulations provide the most promising way for expanding and deepening our understanding of regulators’ interactions. As most of CVS’s models describe only partial control mechanisms, a special model (SM) capable of simulating every combination of control mechanisms is encouraged. This paper has three goals: i) to argue the uncial modeling concept and its physiological basis, ii) to describe SM, and iii) to give basic information about SM’s test research. SM describes human hemodynamics, which is under influence of arterial baroreceptor reflexes, peripheral chemoreceptor reflexes, central (CRAS) and local (lRAS) renin-angiotensin systems, local ischemia, and autoregulation of total brain flow. SM, performed in form of special software (SS), is tested under specific endogenous and/or exogenous alterations. The physiologist using SS can easily construct the desirable configuration of regulator mechanisms, their actual state, and scenarios of computer experiments. Tests illustrated the adequateness of SM, are the first step of SM’s research. Nuances of the interaction of modeled regulator mechanisms have to be illustrated in special publications.