EngRN: Dynamical System (Topic)最新文献_第2页

Dynamic Trends of Fine Particulate Matter Exposure Among 190 Countries 190个国家细颗粒物暴露动态趋势

EngRN: Dynamical System (Topic) Pub Date : 2019-11-28 DOI: 10.2139/ssrn.3494860

Yu Sang Chang, Byong-Jin You, Hann Earl Kim

{"title":"Dynamic Trends of Fine Particulate Matter Exposure Among 190 Countries","authors":"Yu Sang Chang, Byong-Jin You, Hann Earl Kim","doi":"10.2139/ssrn.3494860","DOIUrl":"https://doi.org/10.2139/ssrn.3494860","url":null,"abstract":"Fine particulate matter (PM2.5) is estimated to cause more than 3.7 million premature deaths worldwide. However, the level and annual rate of change for PM2.5 varies greatly among countries in the world. Using PME which is population weighted average annual concentration of PM2.5 to which the typical citizen of each country is exposed, the dynamic trend of PME is measured by the Progress Ratio (PR) from an Experience Curve (EC) involving 190 countries during the period 2000-2014. The average PR for the total group is 96.51% indicating only a moderate decreasing trend of 4.49% per each doubling of the cumulative energy consumption. While a majority of 118 countries experienced a decreasing a trend of PME with an averaged PR of 88.05%, the remaining 72 countries displayed an increasing averaged PR of 110.39%. When two different types of EC, classical and kinked were applied, a majority of 135 countries recorded an averaged PR of 99.68%, while the remaining 55 countries experienced an average PR of 88.94%. Further examination on the type of slope and trend suggests the chances of a major improvement of future PME in the following order: (1) The 60 countries with an increasing classical slope; (2) The 12 countries with an increasing kinked slope; (3) The 75 countries with a decreasing classical slope.; (4) The 43 countries with a decreasing kinked slope. Further implication from these findings will be discussed.","PeriodicalId":207061,"journal":{"name":"EngRN: Dynamical System (Topic)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128619470","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Explicit Dynamic Analysis of Tensional & Torsional Propagations on Composite Material with Dog Bone Shaped Testing Specimen 狗骨形试件复合材料拉扭传播的显式动力分析

EngRN: Dynamical System (Topic) Pub Date : 2019-08-27 DOI: 10.2139/ssrn.3443709

Yedla Gopala Rao, M. Nataraj, P. Srinivas

{"title":"Explicit Dynamic Analysis of Tensional & Torsional Propagations on Composite Material with Dog Bone Shaped Testing Specimen","authors":"Yedla Gopala Rao, M. Nataraj, P. Srinivas","doi":"10.2139/ssrn.3443709","DOIUrl":"https://doi.org/10.2139/ssrn.3443709","url":null,"abstract":"In general the composite are made by percentage of mixed or arrangement or concentration of material properties to increase the strength and advantages of the materials. Toeliminate the holding and gluing problems making the direct tensile strength test hard and torsional momentum loads to be applied, a new method of testing specimens prepared using 3d designing CATIA software to make the dog bone shape is assessed whether it could be applied to determine accurate direct tensile strength values and torsional loads over al alloy materials. In the project, i here considered 3 conditions, High percentage of aluminum alloy and low percentage of the silicon, Low percentage of aluminum alloy and high percentage of the silicon and Balanced percentage of aluminum alloy and silicon A series of modeling and analysis was performed using finite element method (ansys workbench) to investigate the deformation and stress to change of effect by material properties. A proper mechanical material property of the specimens was suggested and ideal failure of the dog bone shaped specimens was determined according to the results obtained from this study.","PeriodicalId":207061,"journal":{"name":"EngRN: Dynamical System (Topic)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129512676","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Cluster Dynamics Modelling of Guinier-Preston Zone Formation in Binary Al-Cu Alloys Derived from Cluster Expansion Energetics 基于团簇扩展能量的二元Al-Cu合金中Guinier-Preston区形成的团簇动力学模型

EngRN: Dynamical System (Topic) Pub Date : 2019-04-10 DOI: 10.2139/ssrn.3384281

Tobias Stegmueller, F. Haider

引用次数: 0

Thermodynamical Investigation of the Quark-Gluon Plasma Phase near the Deconfining Phase Transition 非定义相变附近夸克-胶子等离子体相的热力学研究

EngRN: Dynamical System (Topic) Pub Date : 2019-04-03 DOI: 10.2139/ssrn.3372375

A. Ait El Djoudi, Rokaya Djida, K. Mezouar

引用次数: 0

Inference, Simulation and Application of a Latent Trawl Model for Extreme Values 极值潜在拖网模型的推理、模拟与应用

EngRN: Dynamical System (Topic) Pub Date : 2018-12-05 DOI: 10.2139/ssrn.3296257

Valentin Courgeau, Almut E. D. Veraart

引用次数: 0

Perishable Good Dynamic Pricing Under Competition: An Empirical Study in the Airline Markets 竞争条件下的易腐商品动态定价:航空市场的实证研究

EngRN: Dynamical System (Topic) Pub Date : 2018-09-05 DOI: 10.2139/ssrn.3228392

Nan Chen

引用次数: 6

An Economy-Based Preemption Resource Allocation in Cloud Computing 云计算中基于经济的抢占资源分配

EngRN: Dynamical System (Topic) Pub Date : 2018-07-13 DOI: 10.2139/ssrn.3310368

Anto Leoba, Kombou Victor, Fokam Poka Arsene

引用次数: 1

Copper Diffusion Rates and Hopping Pathways in Superionic Cu 2Se: Implications for Thermoelectricity 铜在超离子cu2se中的扩散速率和跳跃路径:对热电的影响

EngRN: Dynamical System (Topic) Pub Date : 1900-01-01 DOI: 10.2139/ssrn.3716044

Sheik Md Kazi Nazrul Islam, Prince Mayank, Yulou Ouyang, Jie Chen, Arun K. Sagotra, Meng Li, M. Cortie, R. Mole, C. Cazorla, D. Yu, Xiaolin Wang, R. Robinson, D. Cortie

{"title":"Copper Diffusion Rates and Hopping Pathways in Superionic Cu 2Se: Implications for Thermoelectricity","authors":"Sheik Md Kazi Nazrul Islam, Prince Mayank, Yulou Ouyang, Jie Chen, Arun K. Sagotra, Meng Li, M. Cortie, R. Mole, C. Cazorla, D. Yu, Xiaolin Wang, R. Robinson, D. Cortie","doi":"10.2139/ssrn.3716044","DOIUrl":"https://doi.org/10.2139/ssrn.3716044","url":null,"abstract":"The ultra-low thermal conductivity of Cu2Se is well established, but there is so far no consensus on the underlying mechanism. One proposal is that the fast-ionic diffusion of copper suppresses the acoustic phonons. The diffusion coefficients reported previously, however, differ by two orders of magnitude between the various studies and it remains unclear whether the diffusion is fast enough to impact the heat-bearing phonons. Here, a two-fold approach is used to accurately re-determine the diffusion rates. Ab-initio molecular dynamics simulations, incorporating landmark analysis techniques, were closely compared with experimental quasielastic/inelastic neutron spectroscopy. Reasonable agreement was found between these approaches, consistent with the experimental coefficient of 3.1 ± 1.3 10-5 cm2.s-1 and an activation barrier of 140 ± 60 meV. The hopping mechanism includes short 2 Å hops between tetragonal and interstitial octahedral sites. This process forms dynamic Frenkel defects, however, there is no indication of additional broadening in the density-of-states indicating the intrinsic anharmonic interactions dictate the phonon lifetimes.","PeriodicalId":207061,"journal":{"name":"EngRN: Dynamical System (Topic)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134515321","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0