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Computational tools for plant genomics and breeding

Science China(Life Sciences) 2024年第8期67卷 1579-1590页

作者： Hai Wang mengjiao chen Xin Wei Rui Xia Dong Pei Xuehui Huang Bin Han State Key Laboratory of Maize Bio-breeding Frontiers Science Center for Molecular Design BreedingJoint International Research Laboratory of Crop Molecular BreedingNational Maize Improvement CenterCollege of Agronomy and BiotechnologyChina Agricultural UniversityBeijing 100193China Sanya Institute of China Agricultural University Sanya 572025China Hainan Yazhou Bay Seed Laboratory Sanya 572025China State Key Laboratory of Tree Genetics and Breeding Key Laboratory of Tree Breeding and Cultivation of the State Forestry and Grassland AdministrationResearch Institute of ForestryChinese Academy of ForestryBeijing 100091China Shanghai Key Laboratory of Plant Molecular Sciences College of Life SciencesShanghai Normal UniversityShanghai 200234China College of Horticulture South China Agricultural UniversityGuangzhou 510640China National Center for Gene Research CAS Center for Excellence in Molecular Plant SciencesChinese Academy of SciencesShanghai 200233China

Plant genomics and crop breeding are at the intersection of biotechnology and information *** by a combination of highthroughput sequencing,molecular biology and data science,great advances have been made in omics technologies at every step along the central dogma,especially in genome assembling,genome annotation,epigenomic profiling,and transcriptome *** advances further revolutionized three directions of *** is genetic dissection of complex traits in crops,along with genomic prediction and *** second is comparative genomics and evolution,which open up new opportunities to depict the evolutionary constraints of biological sequences for deleterious variant *** third direction is the development of deep learning approaches for the rational design of biological sequences,especially proteins,for synthetic *** three directions of development serve as the foundation for a new era of crop breeding where agronomic traits are enhanced by genome design.

关键词： bioinformatics plant genomics breeding by design

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数据驱动的粮食产能组合预测模型

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南京信息工程大学学报（自然科学版） 2024年第1期16卷 46-55页

作者：张岳陈为真陈梦娇武汉轻工大学电气与电子工程学院武汉430023

针对长短期记忆网络(LSTM)在粮食产能预测上存在超参数众多、长时序列信息丢失以及难以区分主次特征的问题,提出一种数据驱动的粮食产能组合预测模型.在超参数部分,通过引入动态权重和拉普拉斯变异的秃鹰算法(WLBES)对LSTM进行超参数寻... 详细信息

针对长短期记忆网络(LSTM)在粮食产能预测上存在超参数众多、长时序列信息丢失以及难以区分主次特征的问题,提出一种数据驱动的粮食产能组合预测模型.在超参数部分,通过引入动态权重和拉普拉斯变异的秃鹰算法(WLBES)对LSTM进行超参数寻优,避免了手动调参的过程.在预测部分,利用岭回归(RR)对预测结果进行残差修正,弥补LSTM数据丢失的缺陷;同时加入注意力机制,以权重大小区分主次特征,提升粮食产能相关性较大特征的重要性.研究结果表明,WLBES-LSTM-RR组合模型与LSTM模型和WLBES-LSTM模型相比,均方根误差(RMSE)分别下降了75%、19%,相较于其他优化LSTM的组合模型,RMSE大幅下降,该组合模型在粮食产能预测上具有更高的预测精度.

关键词：粮食产能预测秃鹰优化算法长短期记忆网络拉普拉斯变异注意力机制残差修正

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石墨烯/聚偏二氟乙烯界面导热性能的模拟研究

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安徽大学学报（自然科学版） 2024年第2期48卷 68-75页

作者：陈梦娇伍斌夏茹钱家盛陈鹏安徽大学化学化工学院绿色高分子材料安徽省重点实验室安徽合肥230601

采用分子动力学模拟方法,定性分析石墨烯取向对石墨烯/聚偏二氟乙烯(PVDF)复合材料界面热导的影响,研究石墨烯边缘功能化及其比例与石墨烯/PVDF界面热导之间的关系.研究结果表明调节石墨烯在复合材料中的取向程度及对石墨烯边缘功能化... 详细信息

采用分子动力学模拟方法,定性分析石墨烯取向对石墨烯/聚偏二氟乙烯(PVDF)复合材料界面热导的影响,研究石墨烯边缘功能化及其比例与石墨烯/PVDF界面热导之间的关系.研究结果表明调节石墨烯在复合材料中的取向程度及对石墨烯边缘功能化有利于提高石墨烯/PVDF复合材料界面热导.模拟结果为设计和制备高导热复合材料提供新的思路和见解.

关键词：石墨烯聚偏二氟乙烯分子动力学导热性能边缘功能化

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Chaos synchronization with dual-channel time-delayed couplings

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Science China(Technological Sciences) 2016年第3期59卷 428-435页

作者： FAN HuaWei WANG YaFeng chen mengjiao WANG XinGang School of Physics and Information Technology Shaanxi Normal University Institute of Theoretical & Computational Physics Shaanxi Normal University

While the significance of oscillator dynamics and coupling structure to synchronization behaviors has been well addressed in the literature, little attention has been paid to the possible influence of coupling functions. In the present paper, adopting the scheme of dual-channel time-delayed couplings, we investigate how the synchronization behaviors of networked chaotic oscillators are influenced by parameters in the coupling functions. It is found that, with the introduction of the second coupling channel, the synchronization region, as calculated according to the method of master stability function(MSF), can be largely modified. In particular, by a slight change of the time delay, it is found that the synchronization region can be significantly adjusted, or even switched from non-existing to existing. We demonstrate this interesting phenomenon for both situations of processing and propagation induced time delays, as well as for different coupling functions. Our studies shed new light on the mechanism of chaos synchronization, and may potentially be used for the control of complex network dynamics.

关键词： chaos synchronization dual-channel coupling time delay master stability function

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Photovoltaic properties of ferroelectric solar cells based on polycrystalline BiFeO_3 films sputtered on indium tin oxide substrates

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Science China(Physics,Mechanics & Astronomy) 2015年第3期58卷 76-81页

作者： DING JianNing chen mengjiao QIU JianHua YUAN NingYi Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering Changzhou University Center for Low-Dimensional Materials Micro-Nano Devices and Systems Changzhou University Jiangsu Key Laboratory for Solar Cell Materials and Technology Changzhou University

To study the ferroelectric photovoltaic effect based on polycrystalline films, preparation of high-quality polycrystalline films with low leakage and high remnant polarization is essential. Polycrystalline BiFeO3 （BFO） thin films with extremely large remnant polarization （2Pr = 180 ~aC/cm2） were successfully deposited on glass substrates coated with indium tin oxide using a modified radio frequency magnetron sputtering method. Symmetric and asymmetric cells were constructed to investigate the ferroelectric photovoltaic effect in order to understand the relationship between polarization and photovoltaic response. All examined cells showed polarization-induced photovoltaic effect. Our findings also showed that the ferroelectric photovoltaic effect is highly dependent on the material used for the top electrode and the thickness of the polycrystalline film.

关键词： polycrystalline BiFeO3 photovoltaic effect ferroelectric solar cells Indium tin oxide substrate

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Female-biased Dispersal of the Emei Moustache Toad (Leptobrachium boringii) under Local Resource Competition

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Asian Herpetological Research 2019年第1期10卷 24-31页

作者： Wenxia WANG Shichao WEI mengjiao chen Hua WU Institute of Evolution and Ecology School of Life Sciences Central China Normal University

Dispersal is an important area of ecological and evolutionary *** many studies have been conducted in mammals and birds,dispersal pattern in amphibians is still *** verify dispersal patterns of amphibians,an endangered species the Emei Moustache Toad(Leptobrachium boringii)was *** this study,we analyzed six genetic parameters:inbreeding coefficient(F_(IS)),gene diversity(H_S),the mean of corrected assignment index(mAI_C),the variance of corrected assignment index(vAI_C),relatedness(r)for all three years together and each year separately based on eight highly polymorphic microsatellite *** in totaled across years and each year for 581 individuals captured during 2013–2015 revealed a significant female-biased dispersal *** higher F_(IS) and H_S in females,and lower mAI_C and r for each year separately in females support that *** displays femalebiased dispersal,although r for the total dataset and vAI_C tests did not show significant differences between the ***-biased dispersal patterns may be explained by the local resource competition hypothesis.

关键词： Leptobrachium boringii microsatellite DNA female-biased dispersal the local resource competition hypothesis

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An All‑In‑One Multifunctional Touch Sensor with Carbon‑Based Gradient Resistance Elements

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Nano-Micro Letters 2022年第8期14卷 124-141页

作者： Chao Wei Wansheng Lin Shaofeng Liang mengjiao chen Yuanjin Zheng Xinqin Liao Zhong chen Department of Electronic Science Xiamen UniversityXiamen 361005People’s Republic of China Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province Xiamen 361005People’s Republic of China School of Electrical and Electronic Engineering Nanyang Technological UniversitySingapore 639798Singapore

Human–machine interactions using deep-learning methods are important in the research of virtual reality,augmented reality,and *** research remains challenging as current interactive sensing interfaces for single-point or multipoint touch input are trapped by massive crossover electrodes,signal crosstalk,propagation delay,and demanding configuration ***,an all-inone multipoint touch sensor(AIOM touch sensor)with only two electrodes is *** AIOM touch sensor is efficiently constructed by gradient resistance elements,which can highly adapt to diverse application-dependent *** with deep learning method,the AIOM touch sensor can be utilized to recognize,learn,and memorize human–machine interactions.A biometric verification system is built based on the AIOM touch sensor,which achieves a high identification accuracy of over 98%and offers a promising hybrid cyber security against password *** human–machine interactions,including freely playing piano music and programmatically controlling a drone,demonstrate the high stability,rapid response time,and excellent spatiotemporally dynamic resolution of the AIOM touch sensor,which will promote significant development of interactive sensing interfaces between fingertips and virtual objects.

关键词： Multifunctional touch sensor Carbon functional material Paper-based device Gradient resistance element Human–machine interaction

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外源诱导子和温度对黑果枸杞悬浮细胞花青素积累的影响

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陕西师范大学学报（自然科学版） 2024年第1期52卷 79-89页

作者：曾海涛仇莹莹徐皓唐琪陈梦娇郑涛陕西理工大学生物科学与工程学院陕西省资源生物重点实验室秦巴生物资源与生态环境省部共建国家重点实验室(培育)陕南秦巴山区生物资源综合开发协同创新中心陕西汉中723000

黑果枸杞富含花青素,是一种具有很高开发利用价值的药食同源植物。以黑果枸杞无菌苗的叶片为外植体诱导愈伤组织建立细胞悬浮体系,研究不同外源激素和温度对黑果枸杞悬浮细胞中花青素含量的影响。黑果枸杞愈伤组织诱导的最佳培养体系为W... 详细信息

黑果枸杞富含花青素,是一种具有很高开发利用价值的药食同源植物。以黑果枸杞无菌苗的叶片为外植体诱导愈伤组织建立细胞悬浮体系,研究不同外源激素和温度对黑果枸杞悬浮细胞中花青素含量的影响。黑果枸杞愈伤组织诱导的最佳培养体系为WPM+0.5 mg/L激动素+2.0 mg/L 2,4-二氯苯氧乙酸+20.0 g/L蔗糖+6.0 g/L琼脂,悬浮细胞培养的最优体系为WPM+0.5 mg/L激动素+2.0 mg/L 2,4-二氯苯氧乙酸+0.01 mg/L萘乙酸+20.0 g/L蔗糖,其生长曲线呈“S”形,活细胞数量在悬浮培养第18天时达到峰值,为7.93×10^(5)个/mL。30 g/L蔗糖、200 mg/L茉莉酸甲酯、2 mg/L脱落酸及16℃单一处理均能显著促进悬浮细胞花青素产量的提升(P<0.05),2 mg/L脱落酸诱导效果最佳。在16℃和3种外源激素的复合处理下,200 mg/L茉莉酸甲酯+16℃的复合诱导处理能显著促进细胞花青素积累(P<0.05),含量是16℃单因素处理的1.13倍。研究结果为进一步优化黑果枸杞悬浮细胞培养体系、促进花青素积累奠定了基础。

关键词：黑果枸杞悬浮细胞培养花青素外源诱导子温度

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