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Effects of Constant versus Fluctuating Incubation Temperatures on Hatching Success, Incubation Length, and Hatchling Morphology in the Chinese Skink (Plestiodon chinensis)

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Asian Herpetological Research 2017年第4期18卷 262-268页

作者： Wen SHEN jianchi pei Longhui LIN Xiang JI School of Sports and Health Hangzhou Normal University Hangzhou 310036 Zhejiang China Jiangsu Key Laboratory for Biodiversity and Bioteehnology College of Life Sciences Nanjing Normal University Nanjing 210023 Jiangsu China School of Life and Environmental Sciences Hangzhou Normal University Hangzhou 310036 Zhejiang China

We incubated eggs ofPlestiodon chinensis under five constant （24, 26, 28, 30, and 32 ℃） and one fluctuating thermal regimes to examine the effects of constant versus fluctuating incubation temperatures on hatching success, incubation length, and hatchling morphology. The duration of incubation varied considerably among the six temperature treatments, whereas hatching success did not. The mean incubation length decreased as temperature increased in a nonlinear way, and increased as the thermal variance increased. Incubation temperature affected the body size （linear length and mass） and shape of hatchlings, with eggs incubated at 26, 28, and 30 ℃ producing larger and heavier hatchlings than did those incubated at 24 ℃, 32 ℃, or fluctuating temperatures. Our results showed that exposure of P. chinensis eggs to extreme temperatures for brief periods of time did not increase embryonic mortality and, in the fluctuating-temperature treatment, the thermal variance affected hatchling morphology more evidently than the thermal mean. Our results highlight the importance of the thermal variance in affecting embryonic development and hatchling morphology, and add further evidence that temperatures within the range of 26-30 ℃ are optimal for P. chinensis embryos.

关键词： Developmental plasticity egg incubation hatchling phenotype scincid lizard thermal variance thermal mean

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Sexual Dimorphism, Female Reproductive Characteristics and Egg Incubation in an Oviparous Forest Skink(Sphenomorphus incognitus) from South China

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Asian Herpetological Research 2018年第2期9卷 119-128页

作者： Li MA jianchi pei Cuntong ZHOU Yu DU Xiang JI Wen SHEN School of Sports and Health Hangzhou Normal University Jiangsu Key Laboratory for Biodiversity and Biotechnology College of Life Sciences Nanjing Normal University College of Ecology Lishui University Hainan Key Lab for Herpetology College of Tropical Biology and Agronomy Hainan Tropical Ocean University

We studied sexual dimorphism and female reproduction in an oviparous forest skink （Sphenomorphus incognitus） from South China. We incubated eggs under five thermal regimes （22, 25, 28, 25 ± 3 and 27± 5℃） to examine the effects of constant versus fluctuating temperatures on incubation length and hatchling morphology. In our sample the largest male and female were 110 mm and 108 mm snout-vent length （SVL）, respectively. Adult males and females did not differ in mean SVL; adult males were larger in head size （both length and width）, longer in fore- and hind-limb lengths and shorter in abdomen length than females of the same SVL. Accordingly, we conclude that S. incognitus is a sexually monomorphic species in terms of SVL but shows sexual dimorphism in head size, abdomen length and appendage length. Females laid a single clutch of 3-10 eggs per breeding season from early May to mid- August, with larger females generally laying more （but not always larger） eggs per clutch than did smaller ones. Embryonic stages at laying ranged from Dufaure and Hubert＇s （1961） stage 31 to 32, with a mean stage of 31.3. The positive relationship between clutch mass and female SVL was not significant. The offspring size-number trade-off does not exist in S, incognitus, as revealed by the fact that egg mass was independent of relative fecundity. Incubation length decreased as temperature increased, and stable temperatures resulted in delayed hatching. Hatchlings incubated under the five thermal regimes did not differ from each other in any examined trait, suggesting that S. incognitus is among oviparous reptilian species where incubation temperature has no role in modifying hatchling morphology as long as eggs are not exposed to extreme temperatures for prolonged periods of time.

关键词： egg hatchling morphology incubation length reproduction Scincidae sexual dimorphism

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无线电遥测技术在生物学研究中的应用

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杭州师范大学学报（自然科学版） 2017年第3期16卷 284-289页

作者：沈纹裴剑驰计翔杭州师范大学体育与健康学院浙江杭州310036 南京师范大学生命科学学院江苏南京210023

无线电遥测技术是利用无线电波对目标物进行远距离测定的技术,自20世纪诞生以来,已经发展为多种不同的运用类型,包括追踪定位以及温度、力、血压、心率和振动频率的测定等,并广泛应用于生物学的各个领域.当前,无线电遥测技术正在向小型... 详细信息

无线电遥测技术是利用无线电波对目标物进行远距离测定的技术,自20世纪诞生以来,已经发展为多种不同的运用类型,包括追踪定位以及温度、力、血压、心率和振动频率的测定等,并广泛应用于生物学的各个领域.当前,无线电遥测技术正在向小型化、耐久化、多功能化以及与其他研究手段结合等方向发展,同时也暴露出了一些问题.文章综述了无线电遥测技术的应用类型、发展趋势及存在的问题,并对该技术的发展前景做出展望.

关键词：无线电遥测追踪定位生物学

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Progress and Achievements of Multi-sensor Fusion Navigation in China during 2019—2023

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Journal of Geodesy and Geoinformation Science 2023年第3期6卷 102-114页

作者： Xingxing LI Xiaohong ZHANG Xiaoji NIU Jian WANG Ling pei Fangwen YU Hongjuan ZHANG Cheng YANG Zhouzheng GAO Quan ZHANG Feng ZHU Weisong WEN Tuan LI jianchi LIAO Xin LI Shool of Geodesy and Gevmatics Wuhan UniversityWuhan 430074China School of Geomatics and Urban Spatial Infor-matics Beijing University of Civil Engineering and ArchitectureBeijing 100044China Shanghai Jiao Tong University Shanghai 200052China Center for Brain-inspired Computing Research Tsinghua UniversityBeijing 100084China School of Land Science and Technology China University of Geosciences(Beijing)Beijing 100084China Department of Aeronautical and Aviation Engineering The Hong Kong Polytechnic UniversityHong Kong 900777China School of Electronic and Information Engineering Beihang UniversityBeijing 100191China Advanced Research Institute of Multidisciplinary Sci-ences Beijing Institute of TechnologyBeijing 100081China Hubei Luojia Laboratory Wuhan 430074China

Global Navigation Satellite System(GNSS)can provide all-weather,all-time,high-precision positioning,navigation and timing services,which plays an important role in national security,national economy,public life and other ***,in environments with limited satellite signals such as urban canyons,tunnels,and indoor spaces,it is difficult to provide accurate and reliable positioning services only by satellite ***-source sensor integrated navigation can effectively overcome the limitations of single-sensor navigation through the fusion of different types of sensor data such as Inertial Measurement Unit(IMU),vision sensor,and LiDAR,and provide more accurate,stable and robust navigation information in complex *** summarizes the research status of multi-source sensor integrated navigation technology,and focuses on the representative innovations and applications of integrated navigation and positioning technology by major domestic scientific research institutions in China during 2019—2023.

关键词： Simultaneous Localization And Mapping(SLAM) integrated navigation multi-sensor fusion

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基于最佳几何约束的遥感影像点匹配算法

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中国矿业大学学报 2017年第6期46卷 1378-1385页

作者：裴亮廖健驰戴激光朱恩泽辽宁工程技术大学测绘与地理科学学院辽宁阜新123000

针对尺度不变特征变换(SIFT)点匹配算法中几何约束缺失问题,提出了一种基于最佳匹配几何约束的点匹配算法.该算法以SIFT匹配算法为基础,首先构建左右影像特征点集的转换模型,然后采用改进的量子粒子群算法对模型参数进行迭代寻优,每次... 详细信息

针对尺度不变特征变换(SIFT)点匹配算法中几何约束缺失问题,提出了一种基于最佳匹配几何约束的点匹配算法.该算法以SIFT匹配算法为基础,首先构建左右影像特征点集的转换模型,然后采用改进的量子粒子群算法对模型参数进行迭代寻优,每次粒子位置更新后,采用基于搜索圆的特征点匹配算法获取新位置下的特征点,并根据获取的特征点情况计算其适宜度与辅助适宜度来对粒子位置进行评价,经过多次迭代,最终获取匹配影像的最佳几何约束与该约束下相应的匹配点,实现了特征点的匹配.选取多幅遥感影像进行点匹配实验,结果表明:相比其它的点匹配算法,该算法在匹配点的数目与精度上都有显著提高,能够获得更好的点匹配结果.

关键词：点匹配匹配约束最佳匹配几何约束量子粒子群算法

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