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Anthocyanin accumulation in juvenile Schima superba leaves is a growth trade-off by consuming energy for adaptation to high light during summer

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Journal of Plant Ecology 2019年第3期12卷 507-518页

作者： zhengchao yu Qilei Zhang Xiaoting Zheng Xuandong Huang Changlian Peng Guangdong Provincial Key Laboratory of Biotechnology for Plant Development School of Life SciencesSouth China Normal UniversityGuangzhou 510631China

Aims Anthocyanin accumulation is the main factor underlying why young plant leaves turn red,and plant growth follows the principle of maximizing the economic efficiency of energy.There is a need to verify the role of young plant leaves turning red and confirm whether anthocyanin accumulation overconsumes the energy of the plant.Methods We compared the different pigment contents,antioxidant capaci-ties,leaf mass per area,photosynthetic characteristics,dark res-piration rates,light compensation points(LCPs)and electron flow distribution of young and mature Schima superba leaves grown under full sunlight and 30%full sunlight conditions.We then exam-ined the correlations between anthocyanins and total antioxidant capacity,photosynthetic pigments,dark respiration rates,LCPs by using linear regression.Finally,we analyzed Pearson correlation coefficients and used principal component analysis to evaluate the interactions of these functional indicators.Important Findings The young leaves of S.superba accumulated anthocyanins in full sunlight but not in 30%full sunlight.Anthocyanins substantially con-tributed to the total antioxidant capacity(accounting for 33.29%)in juvenile S.superba leaves.Young leaves containing more anthocyanin accumulated less reactive oxygen species after high light(HL)treat-ment.However,juvenile leaves accumulating anthocyanins showed 56.97%higher dark respiration rates,24.79%higher LCPs and 5.32%higher allocations of electron flow to photorespiration and lower organic substance accumulation than did those without anthocyanins.These results suggest that young S.superba leaves must consume more energy to accumulate anthocyanins to adapt to HL environments.Therefore,plants sacrifice growth rate to ensure survival,which is a trade-off for their ability to respond to external environments.

关键词： juvenile leaves anthocyanin high light environment trade-off photoprotection

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The future of artificial hibernation medicine:protection of nerves and organs after spinal cord injury

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Neural Regeneration Research 2024年第1期19卷 22-28页

作者： Caiyun Liu Haixin yu zhengchao Li Shulian Chen Xiaoyin Li Xuyi Chen Bo Chen School of Acupuncture&Moxibustion and Tuina Tianjin University of Traditional Chinese MedicineTianjinChina Research Center of Experimental Acupucture Science Tianjin University of Traditional Chinese MedicineTianjinChina Characteristic Medical Center of Chinese People’s Armed Police Force TianjinChina Binhai New Area Hospital of TCM TianjinChina Fourth Teaching Hospital of Tianjin University of TCM TianjinChina

Spinal cord injury is a serious disease of the central nervous system involving irreversible nerve injury and various organ system injuries.At present,no effective clinical treatment exists.As one of the artificial hibernation techniques,mild hypothermia has preliminarily confirmed its clinical effect on spinal cord injury.However,its technical defects and barriers,along with serious clinical side effects,restrict its clinical application for spinal cord injury.Artificial hibernation is a futureoriented disruptive technology for human life support.It involves endogenous hibernation inducers and hibernation-related central neuromodulation that activate particular neurons,reduce the central constant temperature setting point,disrupt the normal constant body temperature,make the body adapt"to the external cold environment,and reduce the physiological resistance to cold stimulation.Thus,studying the artificial hibernation mechanism may help develop new treatment strategies more suitable for clinical use than the cooling method of mild hypothermia technology.This review introduces artificial hibernation technologies,including mild hypothermia technology,hibernation inducers,and hibernation-related central neuromodulation technology.It summarizes the relevant research on hypothermia and hibernation for organ and nerve protection.These studies show that artificial hibernation technologies have therapeutic significance on nerve injury after spinal co rd injury through inflammatory inhibition,immunosuppression,oxidative defense,and possible central protection.It also promotes the repair and protection of res pirato ry and digestive,cardiovascular,locomoto r,urinary,and endocrine systems.This review provides new insights for the clinical treatment of nerve and multiple organ protection after spinal cord injury thanks to artificial hibernation.At present,artificial hibernation technology is not mature,and research fa ces various challenges.Neve rtheless,the effort is wo rthwhile for the future development of medicine.

关键词： artificial hibernation central thermostatic-resista nt regulation hypothermia multi-system protection neuroprotection organ protection spinal cord injury synthetic torpor

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模拟酸雨对4种木本植物叶绿素荧光特性的影响

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华南师范大学学报（自然科学版） 2018年第4期50卷 74-80页

作者：黄烜栋常诚俞正超彭长连广东省植物发育生物工程重点实验室∥华南师范大学生命科学院广州510631

文中研究了不同pH(2.5、4.5)模拟酸雨对4种鼎湖山南亚热带森林优势树种:木荷(Schima superba)、黧蒴(Castanopsis fissa)、肖蒲桃(Acmena acuminatissima)、黄果厚壳桂(Cryptocarya concinna)叶片叶绿素荧光特性的影响,结果表明:4种木本植物离体叶片经pH 4.5模拟酸雨处理7 d后未出现可见伤害,Fv/Fm与对照组相比无显著差异.而在经pH 2.5模拟酸雨处理7 d后,叶片均出现了明显的可见伤害,其中黄果厚壳桂的可见伤害程度和PSII受损程度较其他3种植物小.经pH 2.5或pH 4.5的模拟酸雨处理后,黄果厚壳桂叶片光PSII电子传递速率(ETRII)大幅度降低,同时PSI环式电子流被激发,这可能是其提高自身抗酸能力的主动调节机制.研究结果显示,黄果厚壳桂的抗酸雨胁迫的能力高于其他3种木本植物,酸沉降可能会提高南亚热带森林群落中黄果厚壳桂的相对优势地位.

关键词：模拟酸雨木本植物叶绿素荧光 PSI环式电子流

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一种高效环境WiFi能量收集系统

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无线电工程 2018年第6期48卷 492-496页

作者：徐涛於正超沈阳航空航天大学自动化学院辽宁沈阳110136

针对无线传感器系统高效率供电的问题,提出通过射频收集能量并转换为电能的方式将能量提供给无线传感器系统使用的方法。重点研究一款高效的环境WiFi能量收集系统,主要包括天线和整流电路优化设计2大部分。天线由2×2微带天线阵列组成,... 详细信息

针对无线传感器系统高效率供电的问题,提出通过射频收集能量并转换为电能的方式将能量提供给无线传感器系统使用的方法。重点研究一款高效的环境WiFi能量收集系统,主要包括天线和整流电路优化设计2大部分。天线由2×2微带天线阵列组成,主要负责捕获环境中2.4 GHz WiFi信号,提高接收天线的灵敏度。整流电路设计基于Greinacher倍压电路,通过改变倍压电路参数或元器件的方式来提高转换效率即可以高效地转换能量。通过调整天线阵列和整流电路的参数,当输入功率在-35^-10 dBm时,能量收集系统的转换效率可以达到最佳状态。在特定的频带进行仿真测试,能量收集系统接收天线距离WiFi路由器2.3 m时,输出整流电压为1 089 mV。实验结果表明,能量收集系统可以有效地从周围的WiFi信号中收集能量。

关键词：能量收集天线阵列微带天线整流电路

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Impacts of synoptic circulation on surface ozone pollution in a coastal eco-city in Southeastern China during 2014-2019

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Journal of Environmental Sciences 2023年第5期127卷 143-157页

作者： yu Yan Xuesong Wang zhengchao Huang Kun Qu Wenbin Shi Zimu Peng Limin Zeng Shaodong Xie yuanhang Zhang State Key Joint Laboratory of Environmental Simulation and Pollution Control College of Environmental Sciences and EngineeringPeking UniversityBeijing 100871China International Joint Laboratory for Regional Pollution Control Ministry of EducationBeijing 100816China Center for Environmental Education and Communications of Ministry of Ecology and Environment Beijing 100020China Beijing Innovation Center for Engineering Science and Advanced Technology Peking UniversityBeijing 100871China CAS Center for Excellence in Regional Atmospheric Environment Chinese Academy of SciencesXiamen 361021China

The coastal eco-city of Fuzhou in Southeastern China has experienced severe ozone(O_(3))episodes at times in recent years.In this study,three typical synoptic circulations types(CTs)that influenced more than 80%of O_(3) polluted days in Fuzhou during 2014-2019 were identified using a subjective approach.The characteristics of meteorological conditions linked to photochemical formation and transport of O_(3) under the three CTs were summarized.Comprehensive Air Quality Model with extensions was applied to simulate O_(3) episodes and to quantify O_(3) sources from different regions in Fuzhou.When Fuzhou was located to the west of a high-pressure system(classified as“East-ridge”),more warm southwesterly currents flowed to Fuzhou,and the effects of cross-regional transport from Guangdong province and high local production promoted the occurrence of O_(3) episodes.Under a uniform pressure field with a low-pressure system occurring to the east of Fuzhou(defined as“East-low”),stagnant weather conditions caused the strongest local production of O_(3) in the atmospheric boundary layer.Controlled by high-pressure systems over the mainland(categorized as“Inland-high”),northerly airflows enhanced the contribution of cross-regional transport to O_(3) in Fuzhou.The abnormal increases of the“East-ridge”and“Inland-high”were closely related to O_(3) pollution in Fuzhou in April and May 2018,resulting in the annual maximum number of O_(3) polluted days during recent years.Furthermore,the rising number of autumn O_(3) episodes in 2017-2019 was mainly related to the“Inland-high”,indicating the aggravation of cross-regional transport and highlighting the necessity of enhanced regional collaboration and efforts in combating O_(3) pollution.

关键词： Ozone pollution Synoptic circulation Regional transport Chemical production

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2种光强下生长的4种木本植物叶片的光保护物质积累能力与光合能力的关系

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华南师范大学学报（自然科学版） 2019年第3期51卷 62-69页

作者：俞正超刘晓涛郑晓婷黄烜栋彭长连广东省植物发育生物工程重点实验室∥华南师范大学生命科学院

研究了2种不同光强下生长的4种南亚热带森林优势树种:木荷(Schima superba)、黧蒴(Castanopsis fissa)、黄果厚壳桂(Cryptocarya concinna)和肖蒲桃(Acmena acuminatissima)幼叶和成熟叶的光保护物质积累能力及其光合能力的关系,结果表... 详细信息

研究了2种不同光强下生长的4种南亚热带森林优势树种:木荷(Schima superba)、黧蒴(Castanopsis fissa)、黄果厚壳桂(Cryptocarya concinna)和肖蒲桃(Acmena acuminatissima)幼叶和成熟叶的光保护物质积累能力及其光合能力的关系,结果表明:无论是全光照还是遮阴下生长,4种木本植物成熟叶的叶绿素(Chl)含量和光合作用速率显著高于幼叶,而花色素苷、类黄酮、总酚、总抗氧化能力和类胡萝卜素/叶绿素(Car/Chl)比值都显著低于幼叶.全光照下生长的幼叶的花色素苷、类黄酮、总酚、总抗氧化能力和Car/Chl比值比遮阴高,显示幼叶的光保护能力在很大程度上是依赖于其较高的光保护物质来实现的,如高的花色素苷含量、类黄酮含量、总酚含量以及Car/Chl比值等;随着幼叶的发育成熟,这些光保护物质含量逐渐减少而光合能力逐渐增加,因此在幼叶和成熟叶中光保护物质积累能力与光合能力呈现负相关关系.

关键词：光保护光合能力花色素苷类黄酮总酚总抗氧化能力

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A new topology for P2P overlay network based on the Generalized Peterson graph

A new topology for P2P overlay network based on the Generali...

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第十三届全国青年通信学术会议

作者： He zhengchao~1 yu Jiguo~2 Zhang Yonghong~3 School of Computer Science,Qufu Normal University,Ri-zhao,Shandong,276826,China

＜正＞There are many structured P2P systems that use DHT technologies to ma Pdata items onto the nodes in various ways for scalable routing and location.Most of them require O（logn）hops per lookup request with O（logn）neighbors per node,where n is the network size.In this paper we present a new oonstant-degree P2P architecture,which emulates a Generalized Peterson（GP） graph in routing of lookup requests.We analysis the properties of the Generalized Peterson graph and give the routing algorithm and the self-organization such as nodes join and departure.

关键词： Peer-to-peer Generalized Peterson graphs Distributed hash table routing algorithm Self-organization

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Introduction to the Special Issue on Recent Advances on Deep Learning for Medical Signal Analysis

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Computer Modeling in Engineering & Sciences 2021年第8期128卷 399-401页

作者： yu-Dong Zhang zhengchao Dong Juan Manuel Gorriz Carlo Cattani Ming Yang School of Informatics University of LeicesterLeicesterLE17RHUK Molecular Imaging and Neuropathology Division Columbia University and New York State Psychiatric InstituteNew YorkNY 10032USA Department of Psychiatry Cambridge UniversityCambridgeCB21TNUK Department of Signal Theory Networking and CommunicationsUniversity of GranadaGranadaSpain Engineering School(DEIM) University of TusciaViterboLazio01100Italy Department of Radiology Children’s Hospital of Nanjing Medical UniversityNanjing210008China

Over the past years,deep learning has established itself as a powerful tool across a broad spectrum of domains,e.g.,prediction,classification,detection,segmentation,diagnosis,interpretation,reconstruction,etc.While deep neural networks initially found nurture in the computer vision community,they have quickly spread over medical imaging applications.

关键词： has initially Deep

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城市深埋黏土隧道变形破坏机制试验研究

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岩石力学与工程学报 2023年第11期42卷 2765-2775页

作者：邱居涛申玉生赵何霖朱正超喻炳鑫董俊苟安迪西南交通大学交通隧道工程教育部重点实验室四川成都610031 西南交通大学陆地交通地质灾害防治技术国家工程研究中心四川成都610031 中铁第四勘察设计院集团有限公司湖北武汉430063

为研究城市深埋黏土隧道受力特性及变形破坏机制,开展室内相似模型试验。采用自主研制的隧道全断面掘进试验装置,运用位移、土压力、应变量测装置及石英砂标记方法,研究开挖过程及不同埋深下隧道受力与变形特征,分析衬砌结构的最终破坏... 详细信息

为研究城市深埋黏土隧道受力特性及变形破坏机制,开展室内相似模型试验。采用自主研制的隧道全断面掘进试验装置,运用位移、土压力、应变量测装置及石英砂标记方法,研究开挖过程及不同埋深下隧道受力与变形特征,分析衬砌结构的最终破坏形态,通过数值模拟证实模型试验的有效性。研究结果表明:隧道开挖后土体裂纹集中分布于开挖面左上方且以压剪破坏为主,隧道开挖引起了土体的纵向不均匀沉降且邻近洞口段土体沉降最大;在50~500 m埋深条件下,土体沉降随着深度的增大而减小,土压力竖向衰减幅值大于横向,隧道结构拱底土压力最大,右拱腰和拱顶次之,左拱腰最小,隧道能够承受的埋深极限为150m;受非对称荷载作用,衬砌右部结构破坏比左部严重,衬砌结构收敛变形类似“横鸭蛋”形状,洞口段拱顶向内收敛最显著,而衬砌末端水平扩张变形明显。试验结果揭示了深埋黏土隧道地层–结构相互作用机制,为深埋地铁隧道安全施工提供了参考依据。

关键词：隧道工程变形机制破坏特征模型试验深埋黏土隧道

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基于视场拼接方法的仿生复眼光学系统设计

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仪器仪表学报 2015年第2期36卷 422-429页

作者：付跃刚赵宇刘智颖董正超长春理工大学光电工程学院长春130022

为解决传统单孔径光学系统存在的大视场与高分辨率之间的矛盾,利用复眼大视场、高分辨率的特点,将大孔径仿生复眼成像技术应用于目标定位系统,并克服了子眼孔径小、视距短的缺陷。首先,通过系统地研究相邻子系统视场间的关系,分析了子... 详细信息

为解决传统单孔径光学系统存在的大视场与高分辨率之间的矛盾,利用复眼大视场、高分辨率的特点,将大孔径仿生复眼成像技术应用于目标定位系统,并克服了子眼孔径小、视距短的缺陷。首先,通过系统地研究相邻子系统视场间的关系,分析了子系统视场分布形式与总视场角的关系。然后,依据入射窗与出射窗的物象共轭关系,提出了子眼视场拼接的几何模型,并推导了子眼视场拼接与子眼系统参数之间的数学关系。最后,利用该方法设计的31组元仿生复眼成像系统全视场可达53.9°,系统最高角分辨率为0.006°,最低角分辨率为0.017°。13组元样机的仿真与实验结果表明:图像采集与视场重合结果与仿真数据一致,验证了该视场拼接方法理论及31组元仿生复眼成像系统设计的正确性。对视场拼接方法的研究解决了大孔径仿生复眼光学系统中子眼视场分配与布局的问题,为大孔径仿生复眼中子眼系统的设计与结构布局提供了理论依据。

关键词：仿生复眼视场拼接目标定位成像系统

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