检索结果-内蒙古大学图书馆

Unusual Dependence between Gene Expression and Negative Selection in Euplotes

MOLECULAR BIOLOGY 2023年第1期57卷 95-100页

作者： Moldovan, M. A. Gaydukova, S. A. Skolkovo Inst Sci & Technol Moscow 121205 Russia Moscow MV Lomonosov State Univ Fac Bioengn & Bioinformat Moscow 199911 Russia

In most of the studied organisms, gene expression is associated with a number of evolutionary features pertaining to the protein-coding sequences. In particular, gene expression positively correlates with the average intensity of negative selection and influences codon usage. Here, we study the connection between gene expression and selection patterns in two species of ciliate protists of the genus Euplotes. We find that codon usage is influenced by gene expression in these organisms, pointing at additional evolutionary constraints on mutations in heavily expressed genes relative to the genes expressed at lower rates. At the same time, at the level of synonymous vs. non-synonymous substitutions we observe a stronger constraint on the genes expressed at lower rates relative to those with higher rates of expression. Our study adds to the discussion about the general evolutionary patterns and opens new questions about the mechanisms of control of gene expression in ciliates.

关键词： gene expression negative selection infusoria ciliates euplotes coding constraint

来源：评论

学校读者我要写书评

暂无评论

A New Time Division Multiplexing Technique

A New Time Division Multiplexing Technique

引用

3rd International Conference on Wireless Communications, Networking and Mobile Computing (WiCOM 2007)

作者： Jiang, Hui Li, Daoben Beijing Univ Posts & Telecommun Sch Informat Engn Key Lab Informat Proc & Intelligent Technol Beijing 100088 Peoples R China

ISBN: (纸本)9781424413119

A new time division multiplexing technique named overlapped time division multiplexing (OVTDM) is presented in this paper. OVTDM technique provides a new method to achieve high spectral efficiency, and with this technique, high spectral efficiency can be obtained even with low order modulation. Moreover, the performance of the OVTDM is better than that of QAM modulation in orthogonal frequency division multiplexing (OFDM) system with the same spectral efficiency. The advantage of OVTDM over QAM in OFDM becomes more and more obvious with the increase of the spectral efficiency. The spectral efficiency, reliability and complexity of OVTDM are analyzed in detail. Theoretical analysis and simulation results show that the OVTDM is the better signaling scheme in performance. However, its complexity grows exponentially with the increase of the spectral efficiency.

关键词： spectral efficiency overlap time division multiplexing coding constraint

来源：评论

学校读者我要写书评

暂无评论

Performance analysis of overlapped multiplexing techniques

Performance analysis of overlapped multiplexing techniques

引用

3rd International Workshop on Signal Design and Its Applications in Communications (IWSDA 07)

作者： Jiang, Hui Li, Daoben Li, Weidong Beijing Univ Posts & Telecommun Key Lab Informat Proc & Intelligent Technol Sch Informat Engn Beijing 100876 Peoples R China Telecommun Planning & Res Inst MII Beijing 100037 Peoples R China

ISBN: (纸本)9781424410736

A class of overlapped multiplexing techniques is presented in this paper, and it includes overlapped time division multiplexing (OVTDM), overlapped frequency division multiplexing (OVFDM) and overlapped time-frequency division multiplexing (OVTFDM). This paper focus on OVTDM, and this new technique can implement transmission with super-high spectral efficiency only by low order modulated signals, and its feature is that there is overlapping between neighbor signals in time domain, which is used to raise the spectral efficiency of the system and generate the coding constraint relationship, thus improving transmission reliability. The theory of OVFDM and OVTFDM is similar to it. Simulation results verify the validity of this theory in additive white Gaussian noise (AWGN) channel and multipath fading channel.

关键词： overlapped multiplexing coding constraint spectral efficiency

来源：评论

学校读者我要写书评

暂无评论

FMG: An observable DNA storage coding method based on frequency matrix game graphs

引用

COMPUTERS IN BIOLOGY AND MEDICINE 2022年第Pt A期151卷 106269-106269页

作者： Cao, Ben Shi, Peijun Zheng, Yanfen Zhang, Qiang Dalian Univ Technol Sch Comp Sci & Technol Dalian 116024 Peoples R China

Using complex biomolecules for storage is a new carbon-based storage method. For example, DNA has the potential to be a good method for archival long-term data storage. Reasonable and efficient coding is the first and most important step in DNA storage. However, current coding methods, such as altruism algorithm, have the problem of low coding efficiency and high complexity, and coding constraints and sets make it difficult to see the coding results visually. In this study, a new DNA storage coding method based on frequency matrix game graph (FMG) is proposed to generate DNA storage coding satisfying combinatorial constraints. Compared with the randomness of the heuristic algorithm that satisfies the constraints, the coding method based on the FMG is deterministic and can clearly explain the coding process. In addition, the constraints and coding results have observable characteristics and are better than the previously published results for the size of the coding set. For example, when length of the code n = 10, hamming distance d = 4, the results obtained by proposed approach combining chaos game and graph are 24% better than the previous results. The proposed coding scheme successfully constructs high-quality coding sets with less complexity, which effectively promotes the development of carbon-based storage coding.

关键词： DNA storage DNA coding Frequency matrix game graph High -quality coding coding constraint

来源：评论

学校读者我要写书评

暂无评论

A New Time Division Multiplexing Technique

A New Time Division Multiplexing Technique

引用

第三届IEEE无线通讯、网络技术暨移动计算国际会议

作者： Hui Jiang Daoben Li Key Laboratory of Information Processing and Intelligent Technology School of Information Engineering Beijing University of Posts and Telecommunications Beijing China

关键词： spectral efficiency overlap time division multiplexing coding constraint

来源：评论

学校读者我要写书评

暂无评论

Performance Analysis of Overlapped Multiplexing Techniques

Performance Analysis of Overlapped Multiplexing Techniques

引用

第三届信号设计及其在通信中的应用国际会议(Proceedings of 2007 International Workshop on Signal Design and Its Applications in Communications IWSDA'07)

作者： Daoben Li Hui Jiang Weidong Li Key Laboratory of Information Processing and Intelligent Technology School of Information Engineeri Telecommunication Planning and Research Institute of MII Beijing 100037 China

A class of overlapped multiplexing techniques is presented in this paper, and it includes overlapped time division multiplexing (OVTDM), overlapped frequency division multiplexing (OVFDM) and overlapped timefrequency division multiplexing (OVTFDM). This paper focus on OVTDM, and this new technique can implement transmission with super-high spectral efficiency only by low order modulated signals, and its feature is that there is overlapping between neighbor signals in time domain,which is used to raise the spectral efficiency of the system and generate the coding constraint relationship, thus improving transmission reliability. The theory of OVFDM and OVTFDM is similar to it. Simulation results verify the validity of this theory in additive white Gaussian noise (AWGN) channel and multipath fading channel.

关键词： overlapped multiplexing coding constraint spectral efficiency

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：