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Rake接收中信号幅度估计算法及误差影响分析

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计算机测量与控制 2025年第1期33卷 285-292,300页

作者：李婧盈潘申富中国电子科技集团公司第54研究所石家庄050081

针对直接扩频通信系统Rake接收中信号幅度估计的问题,分析了幅度估计误差对信号信噪比恶化的影响,得出归一化幅度估计方差与两路信号合并之后的信号信噪比恶化的关系公式;对典型的信号幅度估计算法进行分析,提出了一种基于辅助通道的幅... 详细信息

针对直接扩频通信系统Rake接收中信号幅度估计的问题,分析了幅度估计误差对信号信噪比恶化的影响,得出归一化幅度估计方差与两路信号合并之后的信号信噪比恶化的关系公式;对典型的信号幅度估计算法进行分析,提出了一种基于辅助通道的幅度估计算法,可以在低信噪比且无数据辅助的情况下获得更好的估计性能;对于QPSK调制,两路信号信噪比分别为snr1和snr2,且snr1≥snr2,snr2≥-10 dB,的条件下,取观测长度为2048,采用基于辅助通道的幅度估计算法进行信号幅度估计,实验结果表明,幅度估计误差导致的性能恶化小于0.01 dB,达到了抑制多径干扰、提高通信系统性能的效果。

关键词：扩频通信多径合并幅度误差估计 QPSK Rake接收

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银行客户敏感信息保护技术实践

金融科技时代 2025年第1期33卷 51-54页

作者：李景莹杜望延浦发银行广州分行

随着科技高速发展和数字经济的蓬勃发展,数据的规模和价值不断提升,数据安全变得越来越重要。作为金融机构,银行必须采取有效措施确保敏感信息的安全。文章讨论了一些可以用于保护敏感信息的措施和技术,包括加密技术、数据匿名化技术、... 详细信息

随着科技高速发展和数字经济的蓬勃发展,数据的规模和价值不断提升,数据安全变得越来越重要。作为金融机构,银行必须采取有效措施确保敏感信息的安全。文章讨论了一些可以用于保护敏感信息的措施和技术,包括加密技术、数据匿名化技术、DLP技术、网络安全技术和机器学习技术,并以浦发银行广州分行为例,介绍如何采取这些措施和技术开展客户敏感信息保护工作,如办公终端数据泄露预防技术和客户敏感信息扫描检测技术。

关键词：数据安全个人信息保护 DLP技术网络安全机器学习

life cycle assessment and economic analysis of HFC-134a production from natural gas compared with oil-based and coal-based production

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Frontiers of Chemical Science and Engineering 2022年第12期16卷 1713-1725页

作者： Suisui Zhang Gang li Boyang Bai Luyao Qiang Xiaoxun Ma jingying li School of Chemical Engineering Northwest UniversityXi’an 710069China Chemical Engineering Research Center of the Ministry of Education(MOE)for Advanced Use Technology of Shanbei Energy Xi’an 710069China Shaanxi Research Center of Engineering Technology for Clean Coal Conversion Xi’an 710069China Collaborative Innovation Center for Development of Energy and Chemical Industry in Northern Shaanxi Xi’an 710069China International Scientific and Technological Cooperation Base of the Ministry of Science and Technology(MOST)for Clean Utilization of Hydrocarbon Resources Xi’an 710069China Longdong University Qingyang 745000China

China is the largest producer and consumer of HFC-134a(1,1,1,2-tetrafluoroethane)in the ***-based route is mainly adopted to produce HFC-134a,which suffers from large waste and CO_(2) *** gas is a low-carbon and clean energy resource,and no research has been found on the environment and economy of producing HFC-134a from natural *** this study,CML 2001 method was used to carry out the life cycle assessment of natural gas(partial oxidation)-based and natural gas(plasma cracking)-based routes(abbreviated as gas(O)-based and gas(P)-based routes,respectively),and their environmental performances were compared with coal-based and oil-based ***,considering that China is vigorously promoting the transformation of energy structure,and the application of electric heating equipment to replace fossil-based heating equipment in industrial field,which has a great impact on the environmental performance of the production processes,the authors conducted a scenario *** results showed that the gas(O)-based route had the most favourable environmental ***,the gas(P)-based route had the highest potential for reducing environmental burdens,and its environmental benefit was the most favourable in scenario ***,the economic performance of the gas(P)-based route was significantly better than that of gas(O)-based and coal-based routes.

关键词： life cycle assessment economic performance HFC-134a natural gas oil coal

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Base editing in plants: Current status and challenges

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The Crop Journal 2020年第3期8卷 384-395页

作者： Sutar Suhas Bharat Shaoya li jingying li Lei Yan Lanqin Xia Institute of Crop Sciences Chinese Academy of Agricultural SciencesBeijing 100081China

Genome editing technologies have revolutionized the field of plant science by enabling targeted modification of plant genomes and are emerging as powerful tools for both plant gene functional analyses and crop improvement. Although homology-directed repair(HDR)is a feasible approach to achieve precise gene replacement and base substitution in some plant species, the dominance of the non-homologous end joining pathway and low efficiency of HDR in plant cells have limited its application. Base editing has emerged as an alternative tool to HDR-mediated replacement, facilitating precise editing of plant genome by converting one single base to another in a programmable manner without a doublestranded break and a donor repair template. In this review, we summarize the latest developments in base-editing technologies as well as their underlying mechanisms. We review current applications of these technologies in plant species. Finally, we address the challenges and future perspectives of this emerging technology in plants.

关键词： Base editing in plants Current status and challenges

Increasing yield potential through manipulating of an ARE1 ortholog related to nitrogen use efficiency in wheat by CRISPR/Cas9

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Journal of Integrative Plant Biology 2021年第9期63卷 1649-1663页

作者： Jiahui Zhang Huating Zhang Shaoya li jingying li Lei Yan Lanqin Xia Institute of Crop Sciences Chinese Academy of Agricultural SciencesBeijing 100081China School of Agricultural Sciences Zhengzhou UniversityZhengzhou 450001China

Wheat(Triticum aestivum L.)is a staple food crop consumed by more than 30%of world ***(N)fertilizer has been applied broadly in agriculture practice to improve wheat yield to meet the growing demands for food ***,undue N fertilizer application and the low N use efficiency(NUE)of modern wheat varieties are aggravating environmental pollution and ecological *** nitrogen-limiting conditions,the rice(Oryza sativa)abnormal cytokinin response1 repressor1(are1)mutant exhibits increased NUE,delayed senescence and consequently,increased grain ***,the function of ARE1 ortholog in wheat remains ***,we isolated and characterized three TaARE1 homoeologs from the elite Chinese winter wheat cultivar ZhengMai *** then used CRISPR/Cas9-mediated targeted mutagenesis to generate a series of transgene-free mutant lines either with partial or triple-null taare1 *** transgene-free mutant lines showed enhanced tolerance to N starvation,and showed delayed senescence and increased grain yield in field *** particular,the AABBdd and aabbDD mutant lines exhibited delayed senescence and significantly increased grain yield without growth defects compared to the wild-type ***,our results underscore the potential to manipulate ARE1 orthologs through gene editing for breeding of high-yield wheat as well as other cereal crops with improved NUE.

关键词： CRISPR Increasing yield potential through manipulating of an ARE1 ortholog related to nitrogen use efficiency in wheat by CRISPR/Cas9

Thiol-mediated transportation pathway:an approach for improving tumor penetration of nanomedicines in vivo

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Science China Chemistry 2024年第1期67卷 383-389页

作者： Junjie Zhang Weican Sun Xing Wang Senyan Chen jingying li Huanghao Yang New Cornerstone Science Laboratory Key Laboratory for Analytical Science of Food Safety and Biology(Ministry of Education)College of ChemistryFuzhou UniversityFuzhou 350116China Department of Chemistry and College of Biological Science and Engineering Fuzhou UniversityFuzhou 350116China

Abnormal tumor microenvironment imposes barriers to tumor penetration of nanomedicine,which remains a major challenge for effective ***,we present disulfide-based nanoparticles that actively penetrate deep tumors in vivo through a thiol-mediated transportation *** achieve active tumor accumulation in vivo,disulfide-based nanoparticles are modified with folic acid units(FA-DBNPs).It is gratifying that FA-DBNPs still enter cells via the thiol-mediated pathway,which facilitates transcellular transportation and tumor penetration both in vitro and in ***,FA-DBNPs exhibit GSH concentration-dependent depolymerization characterization,indicating that the GSH level in tumor tissues regulates the penetration depth of *** from these advantages,FA-DBNPs showed potent anti-tumor activity in mouse models,leading to the significant regression of *** current study lays a foundation that thiol-mediated transportation is a promising approach in nanomedicine design for solid tumor therapy.

关键词： deep penetration thiol-mediated pathway transcellular transportation solid tumor

Toward Precision Genome Editing in Crop Plants

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Molecular Plant 2020年第6期13卷 811-813页

作者： jingying li Huiyuan li Jilin Chen Lei Yan Lanqin Xia Institute of Crop Sciences(ICS) Chinese Academy of Agricultural Sciences(CAAS)Beijing 100081China

Precision genome editing through homology-directed repair(HDR)in plants remains very challenging due to the innately low occurrence of HDR and obstacles in the delivery of sufficient donor repair template(DRT)into plant *** single-base substitution,cytidine or adenine base editors have been used successfully in crop plants in recent ***,base editing is constrained by the distance between the targeted base and PAM motif and cannot install predefined transversion mutations or insertions and deletions(indels).Here,we briefly summarize the strategies reported so far for precision genome editing in *** on the recently developed prime editing strategy,which enables gene replacement without double-strand breaks(DSBs)or DRT in both human cells and plants,we provide our perspectives on exploiting diverse strategies to achieve precise targeted gene/allele replacement toward crop improvement and resilience for sustainable agricultural development.

关键词： base install template

Precise Modifications of Both Exogenous and Endogenous Genes in Rice by Prime Editing

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Molecular Plant 2020年第5期13卷 671-674页

作者： Huiyuan li jingying li Jilin Chen Lei Yan Lanqin Xia Institute of Crop Sciences(ICS) Chinese Academy of Agricultural Sciences(CAAS)Beijing 100081China

Dear Editor,Harnessing genetic diversity and the introduction of elite alleles from wild relatives or landraces into commercial cultivars has been a major goal in crop breeding *** modification of the plant genome through clustered regularly interspaced short palindromic repeat(CRISPR)/CRISPR-associated protein(Cas)(CRISPR/Cas)-mediated homology-directed repair(HDR)offers a great promise to introduce elite alleles from wild relatives or landraces into commercialized cultivars in the short term.

关键词： cultivar elite CRISPR/Cas

Plant base editing and prime editing:The current status and future perspectives

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Journal of Integrative Plant Biology 2023年第2期65卷 444-467页

作者： jingying li Chen Zhang Yubing He Shaoya li Lei Yan Yucai li Ziwei Zhu Lanqin Xia Institute of Crop Sciences(ICS) Chinese Academy of Agricultural Sciences(CAAS)Beijing 100081China National Nanfan Research Institute(Sanya) Chinese Academy of Agricultural Sciences/Hainan Yazhou Bay Seed LaboratorySanya 572024China

Precise replacement of an allele with an elite allele controlling an important agronomic trait in a predefined manner by gene editing technologies is highly desirable in crop *** editing and prime editing are two newly developed precision gene editing systems which can introduce the substitution of a single base and install the desired short indels to the target loci in the absence of double-strand breaks and donor repair templates,*** their discoveries,various strategies have been attempted to optimize both base editor(BE)and prime editor(PE)in order to improve the precise editing efficacy,specificity,and expand the targeting ***,we summarize the latest development of various BEs and PEs,as well as their applications in *** on these progresses,we recommend the appropriate BEs and PEs for both basic plant research and crop ***,we propose the perspectives for further optimization of these two *** envision that both BEs and PEs will become the routine and customized precise gene editing tools for both plant biological research and crop improvement in the near future.

关键词： base editing CRISPR/Cas plants precision genome editing prime editing