Results 41 to 50 of about 5,340 (168)
Integrative Conservation, Volume 4, Issue 3, Page 287-301, September 2025.Qilianshan National Park covers approximately 40% of core snow leopard habitat patches and 50% of movement corridors between patches. Including more of these important areas within the park boundaries should be considered, as the Qilianshan National Park sits at a pivotal juncture between critical snow leopard habitat in China and Mongolia, and may ...
Aliana Norris +6 more
wiley +1 more source
Genetic Structure and Breeding System of Kandelia obovata Populations in Zhangjiangkou Mangrove Forest of Fujian Province [PDF]
, 2017 利用9对nSSR引物和3对cpSSR引物，对漳江口红树林国家级自然保护区内秋茄纯林和秋茄＋白骨壤林的秋茄种群进行遗传结构、繁育系统、基因流和空间遗传结构的研究，结果表明： (1)纯林和混交林秋茄种群均存在显著偏离HWE，存在杂合子缺失现象。但并未经历近期瓶颈效应事件。纯林秋茄种群（Na为26.778，He为0.809，I为2.182）和混交林（Na为23.889，He为0.771，I为1.994）均存在高水平的遗传多样性，纯林略高于混交林。纯林秋茄种群共有21个单倍型，显著高于混交林（10个 ...
肖兰
core
Integrative Conservation, Volume 4, Issue 3, Page 405-415, September 2025.Assessing the genetic diversity of edible insects harvested from the wild is a pre‐requisite for designing conservation and management policies. The caterpillars of Gynanisa maja (Saturniidae) are harvested in large numbers in mopane woodlands in southern Africa, where they represent a seasonal source of income and nutrition to many rural communities ...
Zwannda Nethavhani +3 more
wiley +1 more source
Guangtongxin yanjiu, 2001 使用人工智能方法对 PON网络拓扑结构进行优化 ,以富士通 FPX- 1 0 0 0无源光网络系统为例进行了仿真实验 ,并对遗传算法、增添算法和 Hopfield网络方法进行比较 ,仿真结果表明遗传算法明显优于增添算法和 Hopfield网络方法 .遗传算法可使网络建设代价最小化 ,它非常好地解决了 ...
陈亚华 +3 more
doaj
The application of genetic algorithms in LEED(遗传算法在低能电子衍射结构分析中的应用)
Zhejiang Daxue xuebao. Lixue ban, 2000 提出了一种在低能电子衍射(LEED)结构分析中自动搜寻最佳模型的优化方法——遗传算法和张量LEED相结合的联合方法。这种新方法的特点是能在全部参数变化范围内自动搜寻，避免了陷入“局域”优化模型的困难中。本文给出了这一方法的应用实例，并且展望了这种方法在表面结构研究中的应用前景。
HEJiang-ping(何江平) +2 more
doaj +1 more source
, 2012 大头鲤(Cyprinus pellegrini)是一种云南高原湖泊特有的国家Ⅱ级重点保护鱼类。土著种大头鲤与外来种鲤(C.carpio)的渐渗杂交在星云湖野生种群中已经广泛发生。本研究结合形态和微卫星及线粒体DNA分析检测了螺蛳铺大头鲤原种种群的遗传现状。结果显示,螺蛳铺大头鲤样本所有个体在形态上位于大头鲤与鲤的参照样本之间;在微卫星因子对应分析中也显示,其位于大头鲤与鲤的参照样本之间,但与大头鲤参照样本较为相似;在线粒体DNA分析中显示,都具有鲤的单倍型 ...
唐卫星, 陈毅峰
core
Integrative Conservation, Volume 4, Issue 3, Page 277-286, September 2025.This study provides an innovation to address the challenge in accessibility to samples and genetic markers in Snow leopard conservation genetic studies. We performed next‐generation sequencing (NGS) on 19 fecal samples obtained from the eastern Qinghai‐Tibet Plateau, and successfully assembled 17 complete mitogenome sequences (~16,720 bp) and ...
Chen Cheng +7 more
wiley +1 more source
国内虹鳟代表性养殖群体的高通量SNP芯片检测及遗传分析 [PDF]
, 2018 本研究旨在对国内虹鳟(Oncorhynchus mykiss)代表性养殖群体开展全基因组水平的遗传评估。利用57K单核苷酸多态性(single nucleotide polymorphism,SNP)芯片,检测了来自不同地域的6个虹鳟养殖群体样本共计48尾,包括黑龙江虹鳟、黑龙江金鳟、四川虹鳟、四川金鳟、北京虹鳟和北京金鳟,共获得有效SNP位点50201个,在中国虹鳟中的多态比例达到97.7%,表明该芯片虽然基于美国和挪威虹鳟群体设计,但对中国群体同样具有良好的适用性。各群体最小等位基因频率均值为0 ...
Gao Guangtu +8 more
core
Is parvovirus B19 infection upsurge in 2023–2024 associated with adverse pregnancy outcome?
Ultrasound in Obstetrics &Gynecology, Volume 66, Issue 3, Page 307-313, September 2025.ABSTRACT Objective A surge in parvovirus B19 infections has been reported in 2023–2024 across Europe and the USA, raising concerns about the associated perinatal risks. The aim of this study was to compare perinatal outcomes following maternal parvovirus B19 infection during the 2023–2024 period with those from a pre‐2023 cohort.
S. Prasad +22 more
wiley +1 more source
Gaoya dianqi, 2004 利用变压器的油色谱试验数据对神经网络进行训练,将训练后的神经网络用于变压器的状态诊断。同时利用遗传算法优化神经网络的结构。算例结果表明,利用遗传算法和神经网络相结合的人工智能方法可以有效地诊断变压器的状态。
戴仁昶, 赵寿生
doaj