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Influencing factors and contribution analysis of CO_(2) emissions originating from final energy consumption in Sichuan Province,China

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Regional Sustainability 2022年第4期3卷 356-372页

作者： LIU Wei JIA Zhijie DU Meng DONG Zhanfeng PAN Jieyu LI Qinrui PAN Linyan chris umole College of Resources and Environment Chengdu University of Information TechnologyChengdu610225China Environmental Planning Institute Ministry of Ecology and EnvironmentChengdu610225China

Within the context of CO_(2)emission peaking and carbon neutrality,the study of CO_(2)emissions at the provincial level is *** Province in China has not only superior clean energy resources endowment but also great potential for the reduction of CO_(2)***,using logarithmic mean Divisia index(LMDI)model to analysis the influence degree of different influencing factors on CO_(2)emissions from final energy consumption in Sichuan Province,so as to formulate corresponding emission reduction countermeasures from different paths according to the influencing *** on the data of final energy consumption in Sichuan Province from 2010 to 2019,we calculated CO_(2)emission by the indirect emission calculation *** influencing factors of CO_(2)emissions originating from final energy consumption in Sichuan Province were decomposed into population size,economic development,industrial structure,energy consumption intensity,and energy consumption structure by the Kaya-logarithmic mean Divisia index(LMDI)decomposition *** the same time,grey correlation analysis was used to identify the correlation between CO_(2)emissions originating from final energy consumption and the influencing factors in Sichuan *** results showed that population size,economic development and energy consumption structure have positive contributions to CO_(2)emissions from final energy consumption in Sichuan Province,and economic development has a significant contribution to CO_(2)emissions from final energy consumption,with a contribution rate of 519.11%.The industrial structure and energy consumption intensity have negative contributions to CO_(2)emissions in Sichuan Province,and both of them have significant contributions,among which the contribution rate of energy consumption structure was 325.96%.From the perspective of industrial structure,secondary industry makes significant contributions and will maintain a restraining effect;from the perspective of ener

关键词： CO_(2)emissions Final energy consumption Logarithmic mean Divisia index(LMDI)model Industrial structure Grey relation analysis Sichuan Province

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Optical clearing of the mouse skull

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Light(Science & Applications) 2022年第10期11卷 2267-2268页

作者： chris Xu School of Applied and Engineering Physics Cornell UniversityIthacaNY 14853USA

High spatial resolution imaging of the mouse brain through the intact skull is challenging because of the skull-induced aberration and *** research group of Dan Zhu from Huazhong University of Science and Technology has developed a skull-clearing technique that provides a long-term(~weeks),stable,transparent window for high resolution optical imaging over a large field of view.

关键词： scattering. transparent Optical

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Laboratory and field evaluation of asphalt pavement surface friction resistance

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Frontiers of Structural and Civil Engineering 2018年第3期12卷 372-381页

作者： Zhong WU chris ABADIE Louisiana Transportation Research Center 4101 Gourrier Avenue Baton Rouge LA 70808 USA Louisiana Department of Transportation and Development 5080 Florida Blvd Baton Rouge LA 70806 USA

Pavement surface friction is a significant factor for driving safety and plays a critical role in reducing wet- pavement crashes. However, the current asphalt mixture design procedure does not directly consider friction as a requirement. The objective of this study was to develop a surface friction prediction model that can be used during a wearing course mixture design. To achieve the objective, an experimental study was conducted on the frictional characteristics of typical wearing course mixtures in Louisiana. Twelve wearing course mixtures including dense-graded and open-graded mixes with different combinations of aggregate sources were evaluated in laboratory using an accelerated polishing and testing procedure considering both micro- and macro texture properties. In addition, the surface frictional properties of asphalt mixtures were measured on twenty-two selected asphalt pavement sections using different in situ devices including Dynamic Friction Tester （DFT）, Circular Texture Meter （CTM）, and Lock-Wheel Skid Trailer （LWST）. The results have led to develop a procedure for predicting pavement end-of-life skid resistance based on the aggregate blend polish stone value, gradation parameters, and traffic, which is suited in checking whether the selected aggregates in a wearing course mix design would meet field friction requirements under a certain design traffic polishing.

关键词： friction skid resistance polishing PSV LWST micro-texture macro-texture

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Effects of impeller speed and aeration rate on flotation performance of sulphide ore

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中国有色金属学会会刊：英文版 2006年第1期16卷 185-190页

作者：杨小生 ALDRICH chris Institute of Mineral Engineering Northeastern University Shenyang 110004 China Department of Process Engineering University of Stellenbosch Private Bag X1 Matieland Stellenbos ch 7602 South Africa

The effects of aeration rate and impeller speed on the concentrate sulfur grade and recovery for batch flotation of a complex sulphide ore were investigated. The relationships between the water recovery and solid entrainment were discussed. It is found that the solid entrainment is linearly related to the water recovery regardless of aeration rate and impeller speed, and the higher sulfur recovery at the aeration rate of 2 and 4 L/min for the impeller speed of 1 500 r/min is considered to be the contribution of true flotation. Finally, the sulfur recovery flux is correlated with the bubble surface area flux based on the froth image at the different aeration rates and impeller speeds.

关键词：水回收固体夹带浮选性能叶轮速度通风速率硫化矿

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An energy harvester for all seasons

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National Science Review 2023年第10期10卷 10-11页

作者： Qingping Wang chris Bowen Department of Physics & Mechanical and Electronic Engineering Hubei University of Education Centre for Integrated Materials Processes and Structures Department of Mechanical EngineeringUniversity of Bath

The harvesting of sunlight,wind,heat and even raindrops to produce electrical energy has attracted significant attention to address the global energy crisis,reduce environmental pollution from fossil fuels,and limit the use of batteries[1-3].One challenge to harvesting renewable energy sources is their inherent variability,

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Relationship between solids flux and froth features in batch flotation of sulphide ore

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中国有色金属学会会刊：英文版 2005年第6期15卷 1373-1379页

作者：杨小生 Aldrich chris Institute of Mineral Engineering Northeastern University Shenyang 110004 China Department of Process Engineering University of Stellenbosch Private Bag X1 Matieland 7602 South Africa

The froth features in the batch flotation of a sulphide ore were investigated by using the digital image parameters of the froth, the small number emphasis(Nsne), the average grey level(Dagl) and the instability number(Nins), under different conditions of impeller speeds and aeration rates. It is found that the value of Nsne is strongly dependent on the average bubble size of the froth and Dagl on the volume fraction of solid in the froth, and the froth features during the batch flotation are influenced by impeller speed and aeration rate. A kinetic model of the concentrate solid flux was developed which relates the flotation process to the image parameters, Nsne and Dagl of the froth and predictions are well consistent with the experimental data.

关键词：硫化矿浮选选矿发泡剂

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Old MacDonald Has a New Animal on the Farm—Insects

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Engineering 2024年第11期42卷 6-8页

作者： chris Palmer 不详

An arms race underway in France vies to build the world’s lar-gest insect farm,as several companies seek to capitalize on what has been estimated by one market analysis firm to become a 3.3 billion USD industry by 2027[1].Opened in December 2023,the current champion is a 45000 m^(2) farm outside Amiens,built by Paris-based firmŸnsect to annually produce more than 100000 t of mealworms,larvae of the beetle Tenebrio molitor[2].The Amiens farm dethroned a 35000 m^(2)facility capable of annually producing 15000 t of protein from larvae of the black soldier fly(Hermetia illucens)that InnovaFeed,Ÿnsect’s rival Parisian biotechnology company,opened in April 2023 in Nesle,France(Fig.1)[3].How-ever,a planned expansion of the Nesle farm will enlarge its foot-print to 55000 m^(2) and increase its annual production to 75000 t in late 2024,vaulting it back to the top[3].InnovaFeed also has plans to open a 100000 m^(2)farm in Decatur,IL,USA,in 2026[4].Although humans have been eating insects for millennia,and billions of people still do today,the growing insect farming indus-try is not,for the most part,serving up insects for human con-sumption.

关键词： annually companies outside

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A power-law-based approach to mapping COVID-19 cases in the United States

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Geo-Spatial Information Science 2021年第3期24卷 333-339页

作者： Bin Jiang chris de Rijke Faculty of Engineering and Sustainable Development Division of GIScienceUniversity of GävleGävle80176Sweden

This paper examines the spatial and temporal distribution of all COVID-19 cases from January to June 2020 against the underlying distribution of population in the United *** is found that,as time passes,COVID-19 cases become a power law with cutoff,resembling the underlying spatial distribution of *** power law implies that many states and counties have a low number of cases,while only a few highly populated states and counties have a high number of *** further differentiate patterns between the underlying populations and COVID-19 cases,we derived their inherent hierarchy or spatial heterogeneity characterized by the *** found that the ht-index of COVID-19 cases persistently approaches that of the populations;that is,5 and 7 at the state and county levels,*** the ht-index of COVID-19 cases against that of populations shows that the pandemic is largely shaped by the underlying population with the R-square value between infection and population up to 0.82.

关键词： Power laws head/tail breaks hierarchy spatial heterogeneity ht-index

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Differential variable speed limits to improve performance and safety of car-truck mixed traffic on freeways

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Journal of Traffic and Transportation Engineering(English Edition) 2022年第6期9卷 1003-1016页

作者： Anas Abdulghani chris Lee Department of Civil and Environmental Engineering University of WindsorWindsorON N9B 3P4Canada

This study develops a differential variable speed limit(DVSL)which assigns different speed limits for car and truck,and varies speed limits based on traffic *** proposed DVSL algorithm changes speed limits in real time based on truck percentage and occupancy immediately upstream of the ramp and the average speed of the control road sections upstream of the *** algorithm also considers spatial coordination of speeds,which gradually changes the speed limits in successive road sections upstream of the ramp when the severe congestion *** study tested the impacts of DVSL and three other speed limit strategies on delay and safety for a section of the Gardiner Expressway in Toronto,Canada using the VISSIM traffic simulation *** other strategies are 1)uniform speed limit(USL),2)differential speed limit for car and truck(DSL),and 3)USL&DSL(U&D)-i.e.,USL at low truck percentage and DSL at high truck *** was found that DVSL showed the lowest delays for both car and truck among the four *** is mainly because DVSL increased the spacing between vehicles in the right lane upstream of the on-ramp and facilitated vehicles’merging into the mainline *** was also found that DVSL showed the lowest likelihood of rear-end crash between the lead and following vehicles among the four *** study demonstrates that the proposed DVSL algorithm can better control car and truck speeds to reduce delay and improve safety of car-truck mixed traffic flow on freeways.

关键词： Variable speed limit Differential speed limit Truck Traffic performance Safety Freeway

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Garnet fractionation,progressive melt loss and bulk composition variations in anatectic metabasites:Complications for interpreting the geodynamic significance of TTGs

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Geoscience Frontiers 2020年第3期11卷 745-763页

作者： Jillian Kendrick chris Yakymchuk Department of Earth and Environmental Sciences University of WaterlooWaterlooOntarioN2L 3G1Canada

Tonalite-trondhjemite-granodiorite(TTG) suites constitute a large proportion of the Archean geological record;however,the geodynamic processes that generated them,and Archean continental crust in general,remain a subject of *** concentrations and ratios of Sr,Y,La,Yb,Nb,and Ta in TTGs are commonly used to determine the depth of melting of their metabasic *** trace element composition of melt produced by metabasic source rocks during anatexis is strongly affected by the presence and abundance of pressure-sensitive minerals,such as plagioclase(Sr-bearing),garnet(Y-and HREE-bearing),and rutile(Nb-and Ta-bearing).Elevated Sr/Y and La/Yb ratios and low concentrations of Nb and Ta in TTGs are generally considered to indicate melting at high pressures(≥2.0 GPa).The depth of melting is a key factor in determining the origin of TTGs as this provides critical information on the tectonic setting of their *** use phase equilibrium and trace element modelling to explore the effects of three potential influences on TTG trace element compositions:fractionation of trace elements into peritectic garnet cores,progressive melt loss from the source,and source bulk *** model three different compositions of Archean basalts along thermal gradients of 500℃/GPa,750℃/GPa,and 1000℃/*** models produce maj or and trace element melt compositions that are generally consistent with measured compositions of *** Sr/Y,La/Yb,Nb,and Ta exhibit pressure-dependent behaviour,other factors also affect these *** fractionation causes Sr/Y and La/Yb to reach much greater values and in this scenario,the values also increase with increasing *** bulk composition has an effect in all scenarios and most strongly influences La/Yb,Nb,and ***,these results show that Sr/Y,La/Yb,Nb,and Ta can reach values generally considered to be indicative of high pressure melting at a range of P-T conditions including P <2.0 ***,trace ele

关键词： Archean Anatexis Trace element Phase equilibrium modelling Tectonics

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