A row-type mutant of barley named poly-row-and-branched spike （prbs） was previously obtained from a two-rowed cultivar Pudamai-2 after treated by inflorescence soaking in maize total DNA solution. The mutant produce...A row-type mutant of barley named poly-row-and-branched spike （prbs） was previously obtained from a two-rowed cultivar Pudamai-2 after treated by inflorescence soaking in maize total DNA solution. The mutant produces branched spikes with irregular multiple rows. Genetic analysis indicated that the mutant phenotype was caused by a recessive gene prbs, and the PRBS locus had a recessive epistatic effect on an independent locus （denoted as Vrsx） conferring the variation of two-rowed spike vs. six-rowed spike. This study aimed to map PRBS as well as Vrsx using simple sequence repeats （SSR） markers. We developed an F2 population from a cross between the prbs mutant and a six-rowed cultivar Putianwudu for the gene mapping. As the two target loci interacted to result in a segregation ratio of two-rowed type：six-rowed type：prbs=9：3：4 in the population, we adopted a special strategy to map the two loci. PRBS was mapped between SSR markers HvLTPPB and Bmag0508A on the short arm of chromosome 3H, with distances of 24.7 and 14.3 cM to the two markers, respectively. Vrsx was mapped between SSR markers Bmag0125 and Bmag0378 on chromosome 2H, with distances of 6.9 and 15.3 cM to the two markers, respectively. This suggests that Vrsx should be the known locus Vrs1, which predominantly controls row-type variation in barley cultivars, and PRBS is a new locus related to the row type of spikes in barley.展开更多
Microbial degradation technologies have been developed to restore ground water quality in aquifers polluted by organic contaminants effectively in recent years. However, in course of the degradation, the formation of ...Microbial degradation technologies have been developed to restore ground water quality in aquifers polluted by organic contaminants effectively in recent years. However, in course of the degradation, the formation of biofilms in ground water remediation technology can be detrimental to the effectiveness of a ground water remediation project. Several alternatives are available to a remedial design engineer, such as Permeable Reactive Barriers (PRBs) and in -situ bioremediation, Hydrogen Releasing Compounds (HRCs) barrier, Oxygen Releasing Compounds (ORCs) barrier etc. which are efficient and cost- effective technologies. Excessive biomass formation renders a barrier ineffective in degrading the contaminants, Efforts are made to develop kinetics models which accurately determine bio - fouling and bio - filn formation and to control excessive biomass formation.展开更多
基于减少8B/10B编码器占用的逻辑资源和保证该编码器误码率为0的目的,采用查表法和组合逻辑实现相结合的方法设计实现了符合嵌入式互连规范RapidIO协议的8B/10B编码器,通过伪随机二进制序列(Pseudo Random Binary Sequence,PRBS)检测方...基于减少8B/10B编码器占用的逻辑资源和保证该编码器误码率为0的目的,采用查表法和组合逻辑实现相结合的方法设计实现了符合嵌入式互连规范RapidIO协议的8B/10B编码器,通过伪随机二进制序列(Pseudo Random Binary Sequence,PRBS)检测方法对该编码器进行验证。FPGA综合结果表明,该设计占用的LUT为32,占用较少的逻辑资源。采用PRBS-7测试结果表明,该8B/10B编码电路误码率为0,表明了该8B/10B编码器传输信息的可靠性。展开更多
伪随机二进制序列(Pseudo Random Binary Sequence,PRBS)作为测试码型,广泛应用于高速误码率测试中。通过分析并行PRBS生成原理,提出了一种误码率测试中同步的实现方法。由仿真和实际测试结果可知,该方法具有同步速度快、结构简单和消...伪随机二进制序列(Pseudo Random Binary Sequence,PRBS)作为测试码型,广泛应用于高速误码率测试中。通过分析并行PRBS生成原理,提出了一种误码率测试中同步的实现方法。由仿真和实际测试结果可知,该方法具有同步速度快、结构简单和消耗资源少等优点,已成功应用于2G OFDM-PON系统的研发与测试。展开更多
基金supported by the Natural Science Foundation of Fujian Province, China (B0310012)the Education Department of Fujian Province, China (JA09079)the Postdoctoral Research Fund of Human Resources Office of Fujian Province, China (80222)
文摘A row-type mutant of barley named poly-row-and-branched spike （prbs） was previously obtained from a two-rowed cultivar Pudamai-2 after treated by inflorescence soaking in maize total DNA solution. The mutant produces branched spikes with irregular multiple rows. Genetic analysis indicated that the mutant phenotype was caused by a recessive gene prbs, and the PRBS locus had a recessive epistatic effect on an independent locus （denoted as Vrsx） conferring the variation of two-rowed spike vs. six-rowed spike. This study aimed to map PRBS as well as Vrsx using simple sequence repeats （SSR） markers. We developed an F2 population from a cross between the prbs mutant and a six-rowed cultivar Putianwudu for the gene mapping. As the two target loci interacted to result in a segregation ratio of two-rowed type：six-rowed type：prbs=9：3：4 in the population, we adopted a special strategy to map the two loci. PRBS was mapped between SSR markers HvLTPPB and Bmag0508A on the short arm of chromosome 3H, with distances of 24.7 and 14.3 cM to the two markers, respectively. Vrsx was mapped between SSR markers Bmag0125 and Bmag0378 on chromosome 2H, with distances of 6.9 and 15.3 cM to the two markers, respectively. This suggests that Vrsx should be the known locus Vrs1, which predominantly controls row-type variation in barley cultivars, and PRBS is a new locus related to the row type of spikes in barley.
文摘Microbial degradation technologies have been developed to restore ground water quality in aquifers polluted by organic contaminants effectively in recent years. However, in course of the degradation, the formation of biofilms in ground water remediation technology can be detrimental to the effectiveness of a ground water remediation project. Several alternatives are available to a remedial design engineer, such as Permeable Reactive Barriers (PRBs) and in -situ bioremediation, Hydrogen Releasing Compounds (HRCs) barrier, Oxygen Releasing Compounds (ORCs) barrier etc. which are efficient and cost- effective technologies. Excessive biomass formation renders a barrier ineffective in degrading the contaminants, Efforts are made to develop kinetics models which accurately determine bio - fouling and bio - filn formation and to control excessive biomass formation.
文摘基于减少8B/10B编码器占用的逻辑资源和保证该编码器误码率为0的目的,采用查表法和组合逻辑实现相结合的方法设计实现了符合嵌入式互连规范RapidIO协议的8B/10B编码器,通过伪随机二进制序列(Pseudo Random Binary Sequence,PRBS)检测方法对该编码器进行验证。FPGA综合结果表明,该设计占用的LUT为32,占用较少的逻辑资源。采用PRBS-7测试结果表明,该8B/10B编码电路误码率为0,表明了该8B/10B编码器传输信息的可靠性。
文摘伪随机二进制序列(Pseudo Random Binary Sequence,PRBS)作为测试码型,广泛应用于高速误码率测试中。通过分析并行PRBS生成原理,提出了一种误码率测试中同步的实现方法。由仿真和实际测试结果可知,该方法具有同步速度快、结构简单和消耗资源少等优点,已成功应用于2G OFDM-PON系统的研发与测试。
