压缩感知理论突破了经典采样理论的束缚,可有效缓解直扩测控信号大带宽采样引起的信号处理和数据存储的压力。通过分析直扩测控信号与干扰信号的差异,提出一种压缩域直扩测控信号自适应干扰抑制算法。该算法基于直扩测控信号特点构建相...压缩感知理论突破了经典采样理论的束缚,可有效缓解直扩测控信号大带宽采样引起的信号处理和数据存储的压力。通过分析直扩测控信号与干扰信号的差异,提出一种压缩域直扩测控信号自适应干扰抑制算法。该算法基于直扩测控信号特点构建相应的稀疏基,分析直扩测控信号与干扰信号在稀疏基下的归一化残差及其变化规律,通过稀疏系数重构直扩测控信号,并结合归一化残差变化率实现算法的自适应控制。仿真结果表明,所提算法能够有效抑制干扰信号,采用该算法的检测概率和误码率较直接处理分别提高了3 d B和2 d B。展开更多
Transposons are effective mutagens alternative to T-DNA for the generation of insertional mutants in many plant species including those whose transformation is inefficient. The current strategies of transposon tagging...Transposons are effective mutagens alternative to T-DNA for the generation of insertional mutants in many plant species including those whose transformation is inefficient. The current strategies of transposon tagging are usually slow and labor-intensive and yield low frequency of tagged lines. We have constructed a series of transposon tagging vectors based on three approaches： （i） AcTPase controlled by glucocorticoid binding domain/VP16 acidic activation domain/Gal4 DNA-binding domain （GVG） chemical-inducible expression system; （ii） deletion of AcTPase via Cre-lox site-specific recombination that was initially triggered by Ds excision; and （iii） suppression of early transposition events in transformed rice callus through a dual-functional hygromycin resistance gene in a novel Ds element （HPT-Ds）, We tested these vectors in transgenic rice and characterized the transposition events. Our results showed that these vectors are useful resources for functional genomics of rice and other crop plants. The vectors are freely available for the community,展开更多
文摘压缩感知理论突破了经典采样理论的束缚,可有效缓解直扩测控信号大带宽采样引起的信号处理和数据存储的压力。通过分析直扩测控信号与干扰信号的差异,提出一种压缩域直扩测控信号自适应干扰抑制算法。该算法基于直扩测控信号特点构建相应的稀疏基,分析直扩测控信号与干扰信号在稀疏基下的归一化残差及其变化规律,通过稀疏系数重构直扩测控信号,并结合归一化残差变化率实现算法的自适应控制。仿真结果表明,所提算法能够有效抑制干扰信号,采用该算法的检测概率和误码率较直接处理分别提高了3 d B和2 d B。
文摘Transposons are effective mutagens alternative to T-DNA for the generation of insertional mutants in many plant species including those whose transformation is inefficient. The current strategies of transposon tagging are usually slow and labor-intensive and yield low frequency of tagged lines. We have constructed a series of transposon tagging vectors based on three approaches： （i） AcTPase controlled by glucocorticoid binding domain/VP16 acidic activation domain/Gal4 DNA-binding domain （GVG） chemical-inducible expression system; （ii） deletion of AcTPase via Cre-lox site-specific recombination that was initially triggered by Ds excision; and （iii） suppression of early transposition events in transformed rice callus through a dual-functional hygromycin resistance gene in a novel Ds element （HPT-Ds）, We tested these vectors in transgenic rice and characterized the transposition events. Our results showed that these vectors are useful resources for functional genomics of rice and other crop plants. The vectors are freely available for the community,
