A 300 kbps wide-angle non-line-of-sight ultraviolet communication system with voice transmission function is designed here.Based on Poisson distribution theory,we design the symbol detecting method for the receiving d...A 300 kbps wide-angle non-line-of-sight ultraviolet communication system with voice transmission function is designed here.Based on Poisson distribution theory,we design the symbol detecting method for the receiving discrete photon signals.Using 272 nm LED array as the light source and PMT as the detector,the voice transceiver is integrated into the carriable size of 200×90×65 mm^(3).An outfield test shows the system obtains the BER of 0.88% under 200 m.Under 10°wide-angle deviation of the transmitter,a BER below 1.33% is achieved.展开更多
The objectives of this study were to evaluate the return of investment and profitability of a bio-gasification facility using a modeling method.Based on preliminary market analysis,the results determined that the powe...The objectives of this study were to evaluate the return of investment and profitability of a bio-gasification facility using a modeling method.Based on preliminary market analysis,the results determined that the power facilities driven by biomass gasifiers could be profitable if they consider the most sensitive cost factors such as labor,project investment,and feedstock supply.The result showed that economic feasibility of bio-gasification facility can significantly affect by its production capacity and operating modes(one shift,two shifts,or three shifts).The cost analysis modeling approach developed in this study could be a good approach for economic analysis of bio-syngas and bio-fuel products.In addition,this study demonstrated a unique modeling approach to analyze return of investment and profitability of biofuels production.展开更多
Bio-gasification is a new technology and considered as a more efficient way to utilize bioenergy.The economic feasibility becomes one of the greatest issues when we apply this new technology.Evaluation of economic fea...Bio-gasification is a new technology and considered as a more efficient way to utilize bioenergy.The economic feasibility becomes one of the greatest issues when we apply this new technology.Evaluation of economic feasibility of a bio-gasification facility needs better understanding of its production unit cost under different capacities and different working shift modes.The objective of this study was to evaluate the unit cost of biofuel products(Liquid HCs,Light HCs and Oxygenates CxHyOz)under different capacities using a modeling method.The cost analysis model was developed using Visual Basic Microsoft 2008,computer programming language and mathematical equations.The modeling results showed that the unit costs of biofuel product from bio-gasification facility were significantly affected by production capacities of facilities.As the facility capacity increased from 65 to 10,000 N m^3 h^-1,the biofuel production unit cost of gas(Light HCs),oil(Liquid HCs),and aqueous(Oxygenates CxHyOz)decreased from$38.92 per MMBTU,$30.89 per gallon and$25.74 per gallon to$2.01 per MMBTU,$1.59 per gallon,and$1.33 per gallon,respectively.The results of the sensitivity analysis showed that feedstock cost was the most sensitive cost factor on unit costs for all biofuel products at high capacity.The cost analysis model developed in this study could be used to optimize production unit costs of bio-fuel products from bio-gasification facility.展开更多
The nucleosome is the fundamental unit of eukaryotic genomes.Its positioning in the promoter region plays a central role in regulating gene transcription.Experimental evidence suggests that the genomic DNA sequence is...The nucleosome is the fundamental unit of eukaryotic genomes.Its positioning in the promoter region plays a central role in regulating gene transcription.Experimental evidence suggests that the genomic DNA sequence is one important determinant of nucleosome positioning.Several approaches have been developed to predict nucleosome positions based on DNA sequence features,but the results indicate that there is room for improvement.This paper presents a new computational approach to predict genome-wide nucleosome locations in promoter regions.Importantly,the proposed approach outperforms existing approaches in yeast.Further anal-ysis demonstrates that DNA signals for nucleosome posi-tioning vary with species and composition of histones.Analysis of individual genes reveals that the role of the underlying DNA sequence in nucleosome positioning var-ies with genes.展开更多
基金the National Key R&D Program of China under Grant 2019YFB2203700in part by the National Nature Science Fund of China under Grants 61527820 and 61625504.
文摘A 300 kbps wide-angle non-line-of-sight ultraviolet communication system with voice transmission function is designed here.Based on Poisson distribution theory,we design the symbol detecting method for the receiving discrete photon signals.Using 272 nm LED array as the light source and PMT as the detector,the voice transceiver is integrated into the carriable size of 200×90×65 mm^(3).An outfield test shows the system obtains the BER of 0.88% under 200 m.Under 10°wide-angle deviation of the transmitter,a BER below 1.33% is achieved.
基金This material is based upon work performed through the Sustainable Energy Research Center at Mississippi State University and is supported by the Department of Energy under Award Number DE-FG3606GO86025Micro CHP and Biofuel Center.Authors would like to acknowledge all the support of Drs.Fei Yu,and Hakkwan Kim,Dept.of Agricultural and Biological Engineering at Mississippi State University.
文摘The objectives of this study were to evaluate the return of investment and profitability of a bio-gasification facility using a modeling method.Based on preliminary market analysis,the results determined that the power facilities driven by biomass gasifiers could be profitable if they consider the most sensitive cost factors such as labor,project investment,and feedstock supply.The result showed that economic feasibility of bio-gasification facility can significantly affect by its production capacity and operating modes(one shift,two shifts,or three shifts).The cost analysis modeling approach developed in this study could be a good approach for economic analysis of bio-syngas and bio-fuel products.In addition,this study demonstrated a unique modeling approach to analyze return of investment and profitability of biofuels production.
基金This material is based upon work performed through the Sustainable Energy Research Center at Mississippi State University,and is supported by the Department of Energy under Award Number DE-FG3606GO86025Micro CHP and Biofuel Center.
文摘Bio-gasification is a new technology and considered as a more efficient way to utilize bioenergy.The economic feasibility becomes one of the greatest issues when we apply this new technology.Evaluation of economic feasibility of a bio-gasification facility needs better understanding of its production unit cost under different capacities and different working shift modes.The objective of this study was to evaluate the unit cost of biofuel products(Liquid HCs,Light HCs and Oxygenates CxHyOz)under different capacities using a modeling method.The cost analysis model was developed using Visual Basic Microsoft 2008,computer programming language and mathematical equations.The modeling results showed that the unit costs of biofuel product from bio-gasification facility were significantly affected by production capacities of facilities.As the facility capacity increased from 65 to 10,000 N m^3 h^-1,the biofuel production unit cost of gas(Light HCs),oil(Liquid HCs),and aqueous(Oxygenates CxHyOz)decreased from$38.92 per MMBTU,$30.89 per gallon and$25.74 per gallon to$2.01 per MMBTU,$1.59 per gallon,and$1.33 per gallon,respectively.The results of the sensitivity analysis showed that feedstock cost was the most sensitive cost factor on unit costs for all biofuel products at high capacity.The cost analysis model developed in this study could be used to optimize production unit costs of bio-fuel products from bio-gasification facility.
基金supported by the National Natural Science Foundation of China(Grant No.60474075)。
文摘The nucleosome is the fundamental unit of eukaryotic genomes.Its positioning in the promoter region plays a central role in regulating gene transcription.Experimental evidence suggests that the genomic DNA sequence is one important determinant of nucleosome positioning.Several approaches have been developed to predict nucleosome positions based on DNA sequence features,but the results indicate that there is room for improvement.This paper presents a new computational approach to predict genome-wide nucleosome locations in promoter regions.Importantly,the proposed approach outperforms existing approaches in yeast.Further anal-ysis demonstrates that DNA signals for nucleosome posi-tioning vary with species and composition of histones.Analysis of individual genes reveals that the role of the underlying DNA sequence in nucleosome positioning var-ies with genes.
