Results 61 to 70 of about 17,879 (217)
The microbial characteristics of nitrite transformation and diversity changes of microbial community in Litopenaeus vannamei aquaculture [PDF]
, 2017 水产养殖环境是一个具有丰富氮（N）源的N循环系统，而亚硝酸盐（NO2-）是一种存在于养殖水体的毒性物质，过量的NO2-会毒害养殖动物，甚至危害人体健康。养殖水体中亚硝酸盐是如何积累以及如何快速去除，一直是人们关注的热点，也是健康养殖的重点。因此，为了解不同养殖时期水体中参与亚硝酸盐积累与转化的微生物过程，以及细菌菌群动态变化规律及其与水质参数的相互关系。本研究以凡纳滨对虾养殖水体为研究对象，通过功能基因克隆文库和qPCR技术分析养殖水体中参与亚硝酸盐转化的功能基因多样性和丰度 ...
胡东
core
Using camera traps to enhance community‐based management of subsistence hunting in the Amazon
Conservation Biology, Volume 39, Issue 3, June 2025.Abstract Community‐based management and monitoring of biodiversity has emerged as a cost‐effective strategy for providing credible data, informing decision‐making, and empowering local communities in resource governance and management. However, the establishment of community‐based management of subsistence hunting in the Brazilian Amazon has been ...
Ricardo Sampaio +3 more
wiley +1 more source
Backdoor detection in embedded system firmware without file system [PDF]
, 2013 Any embedded system firmware without file system will integrate its system code and user application code into a single file.This setting has brought some additional difficulties to analyze them.Aimed at this kind of firmware,the problem of library ...
Chao-jian HU +3 more
core +1 more source
Application of fuzzy cluster analysis on hydrological prediction(模糊聚类分析在水文预报中的应用)
Zhejiang Daxue xuebao. Lixue ban, 2008 基于聚类分析和模糊数学的基本原理，对影响水文预报结果的特征因子进行研究，运用特征加权模糊聚类分析方法对流域的历史洪水进行模糊聚类分析，然后对不同类的洪水分别进行产汇流参数率定.实验表明，该算法能明显提高曹娥江流域的洪水预报精度.
QIUChao(邱超)
doaj +1 more source
Karyotype analysis of diploid oat germplasm introduced from Canada [PDF]
, 2014 The chromosome karyotype of three diploid oat species was studied with squash method. The results showed that the karyotype formula of Avena strigosa was 2 n =2 x = 14 = 10 m + 4 sm(2SAT),with metacentric and submetacentric chromosomes,1 pair of ...
Liu, W., Wu, B., Zhang, Z.
core
Jianzhu Gangjiegou Jinzhan, 2020 以顶底翼缘角钢半刚性连接和外伸端板半刚性连接为研究对象,基于三参数模型,利用有限元分析软件ANSYS建立有限元模型,得到半刚性连接的弯矩-转角曲线。通过数值分析方法拟合弯矩-转角曲线,得出两种半刚性连接形状系数的近似求解公式,并与已有的试验数据进行对比分析。研究表明,基于三参数模型,利用形状系数近似公式得到的弯矩-转角曲线与有限元模型以及试验数据的弯矩-转角曲线吻合较好,验证了形状系数近似公式的正确性和适用性,为实际工程中的半刚性连接设计方法提供了理论依据。
刘伟, 舒赣平
doaj
Research on Patterning Fingerprint Texture for Cholesteric Liquid Crystal Gratings [PDF]
, 2016 胆甾相液晶指纹织构光栅是基于胆甾相液晶在平面内的周期性排列的相位光栅，由于其在光束调制器件上的应用前景，近几年成为了面向非显示应用的液晶研究领域中的热点之一。聚合物稳定的胆甾相液晶指纹织构光栅实现了零电场下稳定的液晶光栅阵列，发挥了聚合物高分子材料和液晶相结合的优势，可以克服胆甾相液晶指纹织构光栅实用性低的缺点；在此基础上，实现胆甾相液晶指纹织构光栅的聚合稳定图案化的多样性和微型化，将会拓展胆甾相液晶指纹织构光栅在光束调制器、光通讯、显示等领域的应用。基于光控取向的胆甾相液晶指纹织构光栅图案化 ...
罗斌
core
Guangtongxin yanjiu, 2018 当分组传送网以时分复用方式承载电力通信实时业务时,去抖动缓存的参数选择成为提高业务性能的关键手段。文章首先分析了去抖动缓存参数对时分复用业务性能的影响机理,然后设计了缓存参数对业务性能指标影响的数值仿真算法,最后通过仿真实现了去抖动缓存参数的优化。结果表明,优化缓存区长度及分组封装尺寸能有效降低误码率,减少传输时延。
高会生, 程航
doaj
A new Hilbert-type inequality and its extensions(一个新的Hilbert型不等式及其推广)
Zhejiang Daxue xuebao. Lixue ban, 2007 利用权系数及实分析的方法，建立一个新的、不含参量的Hilbert型不等式，并证明其常数因子为最佳值.还考虑了其等价式及含参量的最佳推广情形.
YANGBi-cheng(杨必成)
doaj +1 more source
[Analysis of wideband acoustic immittance measurements in patients with unilateral Ménière's disease]. [PDF]
Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi, 2023 Pan H, Xie M, Liu B, Xiao H.
europepmc +1 more source