为了获得性能高复杂度低的抗多径衰落接收机,该文将快速近似幂迭代(Fast approximated power iteration,FAPI)子空间跟踪算法应用到Rake接收机中,实现一种新型的自适应Rake接收机。采用Rake接收机来消除码分多址通信系统中多径衰落,利用...为了获得性能高复杂度低的抗多径衰落接收机,该文将快速近似幂迭代(Fast approximated power iteration,FAPI)子空间跟踪算法应用到Rake接收机中,实现一种新型的自适应Rake接收机。采用Rake接收机来消除码分多址通信系统中多径衰落,利用FAPI算法实现对信道参数的精准估计,从而进一步改善了Rake接收机的误码率性能。同时,由于FAPI算法的低复杂度,该文所提出的新型Rake接收机也具有复杂度低的特点。实验仿真结果表明:FAPI Rake接收机是一种高性能低复杂度的抗多径接收机。展开更多
The inheritance of chloroplast DNA (cpDNA) in sweet potato (Ipomoea batatas Lain.) was analyzed using DNA restriction fingerprinting. The cpDNA fingerprints of hybrids from reciprocal crosses between Xushu18 and AB78-...The inheritance of chloroplast DNA (cpDNA) in sweet potato (Ipomoea batatas Lain.) was analyzed using DNA restriction fingerprinting. The cpDNA fingerprints of hybrids from reciprocal crosses between Xushu18 and AB78-1 were found to be identical to those of their female parents, which reveals that cpDNA of sweet potato is maternally inherited in this intervarietal crossing. This maternal cpDNA transmission pattern does not accord with the putative one based on former cytological studies. The plastid inheritance in Convolvulaceae has been briefly reviewed in this study, and the utility of DNA restriction fingerprinting analysis in the study of plastid inheritance is also discussed.展开更多
Genetic variations of three species from primary parent （OI Q,SIS Q,Kona Bay Q） and their first filial generation （OI Z,SIS Z,Kona Bay Z） of Litopenaeus vannamei were detected using microsatellite marker technique...Genetic variations of three species from primary parent （OI Q,SIS Q,Kona Bay Q） and their first filial generation （OI Z,SIS Z,Kona Bay Z） of Litopenaeus vannamei were detected using microsatellite marker technique.The amplified products of genomic DNA with 8 microsatellite makers indicated that 8 loci presents polymorphism,the number of total alleles were 28 in 6 species;the number of allele of every loci was 2 to 6;mean allele number （Na） was 3.5;expected heterozygosity value （He） were higher than observed heterozygosity value （Ho）;mean polymorphism information content （PIC） ranged from 0.479 4 to 0.769 9,which showed these 8 loci posses relatively high information content.Through analysis of genetic structure in primary parent and their first filial,allele and effective allele number,observed heterozygosity and expected heterozygosity values and mean polymorphism information content （PIC） in filial generation were little lower than their primary parents.However,genetic diversity of filial generation is not influenced,and still maintains a good heritability.展开更多
We consider an Iterated-Subspace Minimization(ISM) method for solving large-scale unconstrained minimization problems. At each major iteration of the method,a two-dimensional manifold, the iterated subspace, is constr...We consider an Iterated-Subspace Minimization(ISM) method for solving large-scale unconstrained minimization problems. At each major iteration of the method,a two-dimensional manifold, the iterated subspace, is constructed and an approximate minimizer of the objective function in this manifold then determined, and a symmetric rank-one updating is used to solve the inner minimization problem.展开更多
In this paper, we discuss some propertie s of lattice implication algebra and difine the transitivity of implication in a set, we show the transitivity of implication and the substitution Theorem hold i n filters. S...In this paper, we discuss some propertie s of lattice implication algebra and difine the transitivity of implication in a set, we show the transitivity of implication and the substitution Theorem hold i n filters. So every filter of lattice implication algebra satisfies the Syllogis m and substitution Theorem of propositional logic.展开更多
文摘为了获得性能高复杂度低的抗多径衰落接收机,该文将快速近似幂迭代(Fast approximated power iteration,FAPI)子空间跟踪算法应用到Rake接收机中,实现一种新型的自适应Rake接收机。采用Rake接收机来消除码分多址通信系统中多径衰落,利用FAPI算法实现对信道参数的精准估计,从而进一步改善了Rake接收机的误码率性能。同时,由于FAPI算法的低复杂度,该文所提出的新型Rake接收机也具有复杂度低的特点。实验仿真结果表明:FAPI Rake接收机是一种高性能低复杂度的抗多径接收机。
文摘The inheritance of chloroplast DNA (cpDNA) in sweet potato (Ipomoea batatas Lain.) was analyzed using DNA restriction fingerprinting. The cpDNA fingerprints of hybrids from reciprocal crosses between Xushu18 and AB78-1 were found to be identical to those of their female parents, which reveals that cpDNA of sweet potato is maternally inherited in this intervarietal crossing. This maternal cpDNA transmission pattern does not accord with the putative one based on former cytological studies. The plastid inheritance in Convolvulaceae has been briefly reviewed in this study, and the utility of DNA restriction fingerprinting analysis in the study of plastid inheritance is also discussed.
基金Supported by Technology Innovation Projects from Science and Tech-nology Department of Guangdong Province (2008A023700011)~~
文摘Genetic variations of three species from primary parent （OI Q,SIS Q,Kona Bay Q） and their first filial generation （OI Z,SIS Z,Kona Bay Z） of Litopenaeus vannamei were detected using microsatellite marker technique.The amplified products of genomic DNA with 8 microsatellite makers indicated that 8 loci presents polymorphism,the number of total alleles were 28 in 6 species;the number of allele of every loci was 2 to 6;mean allele number （Na） was 3.5;expected heterozygosity value （He） were higher than observed heterozygosity value （Ho）;mean polymorphism information content （PIC） ranged from 0.479 4 to 0.769 9,which showed these 8 loci posses relatively high information content.Through analysis of genetic structure in primary parent and their first filial,allele and effective allele number,observed heterozygosity and expected heterozygosity values and mean polymorphism information content （PIC） in filial generation were little lower than their primary parents.However,genetic diversity of filial generation is not influenced,and still maintains a good heritability.
文摘We consider an Iterated-Subspace Minimization(ISM) method for solving large-scale unconstrained minimization problems. At each major iteration of the method,a two-dimensional manifold, the iterated subspace, is constructed and an approximate minimizer of the objective function in this manifold then determined, and a symmetric rank-one updating is used to solve the inner minimization problem.
文摘In this paper, we discuss some propertie s of lattice implication algebra and difine the transitivity of implication in a set, we show the transitivity of implication and the substitution Theorem hold i n filters. So every filter of lattice implication algebra satisfies the Syllogis m and substitution Theorem of propositional logic.
