Results 61 to 70 of about 19,312 (167)
Numerical simulation of zinc dross diffusion in a continuous hot dip galvanized zinc pot under the industrial production condition [PDF]
, 2016 Based on the discrete phase model of the Euler-Lagrange equation,the concentration fields of three different types of zinc dross under a circulating purification system were calculated by using the numerical simulation method.
DONG An-ping +4 more
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Methods in Ecology and Evolution, Volume 17, Issue 4, Page 1143-1160, April 2026.Abstract DNA barcode‐based species identification has become pivotal in biodiversity research. Current barcoding‐based deep learning methods have advantages in species identification but exhibit significant limitations. By using COI barcoding alone, previous studies were unable to fully capture species identification features. Prior methods showed that
Bin Ye +4 more
wiley +1 more source
Conservation Biology, Volume 40, Issue 2, April 2026.Scaling area‐based conservation, including initiatives led or comanaged by Indigenous Peoples and local communities, is a flagship goal of the Kunming‐Montreal Global Biodiversity Framework. Conservationists often aspire to scale initiatives, but this is rarely achieved in practice. Identifying and addressing factors that limit initiative adoption (i.e.
Thomas Pienkowski +39 more
wiley +1 more source
Guangtongxin yanjiu, 2007 文章采用全矢量有限元法（FVFEM）对不同结构参数的光子晶体光纤（PCF）进行数值分析,得出了基模模场分布,进而计算出高非线性PCF非线性特性的两个重要的基本物理量:有效面积Aeff和非线性系数γ,并分析了Aeff和γ与PCF的结构参数空气孔直径d和空气孔间距Λ之间的关系。
吴铭, 刘海荣, 黄德修
doaj
基于多频超声波技术和GWO-BP算法的变压器油电气性能检测方法研究
Gaoya dianqi, 2020 为了实现对变压器油电气性能快速准确地检测,提出了基于多频超声波（MFU）技术和灰狼优化BP神经网络（GWO-BP）的检测方法,利用不同频率超声波在变压器油中传播速度和衰减系数不同、对不同尺寸颗粒物检测效果不同的特点,综合了超声波在无损检测上的优势以及灰狼算法全局寻优能力强、预测精度高的优点。首先利用超声波在非均匀介质中的传播特性,准确地获取超声波在变压器油中的传播速度、衰减系数等特性参数;再利用灰狼算法对传统BP神经网络进行优化。然后利用灰狼优化的神经网络对样本进行训练 ...
王旭, 生西奎, 慕锟, 王昕
doaj
Parameters setup of AC CMOS gates(交流CMOS门电路参数的设定)
Zhejiang Daxue xuebao. Lixue ban, 2002 CMOS门电路的参数是对它本身物理特性的一种定量描述,对参数的设定是实际应用CMOS门电路的基础. 本文从理想参数出发归纳了直流CMOS门电路主要参数的设定思想并对各项参数进行了分析讨论.然后介绍了交流CMOS门电路的设计思想及结构与工作原理上的特点.在分析二类CMOS电路差异的基础上,本文采用类比的方法对交流CMOS电路的设定进行了研究.
LIUXiao(刘晓), WUXun-wei(吴训威)
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Hobbyist preferences for pet freshwater turtles
Conservation Biology, Volume 40, Issue 2, April 2026.Abstract The burgeoning pet trade is a primary threat to wild freshwater turtles worldwide. Although the risks from commercial exploitation of turtles have been discussed widely, there is little empirical research on preferences for pet turtles from a hobbyists’ perspective.
Jingjing Zhao +7 more
wiley +1 more source
初步建立武汉地区健康成人血浆Cystatin C生物参考区间
Zhongguo shiyan zhenduanxue, 2010 目的通过比较不同性别年龄人群血浆Cystatin C值的差异,尝试建立本地正常人群血浆Cystatin C的生物参考区间。方法研究对象为武汉地区480名成人健康体检者,按不同年龄性别分为四个亚组,18-50岁女性组,50岁以上女性组,18-50岁男性组,50岁以上男性组,每组各120例。采用颗粒增强散射免疫比浊法测定血浆Cystatin C含量。检测结果用SPSS软件进行数据分析。结果50岁以下成人:Cystatin C生物参考区间:0.55-0.93 mg/L,50岁以上人群:Cystatin ...
李辉军, 管青, 周丹
doaj
, 2019 面式散热器位于航空发动机进气道段,可将进气道壁面作为传热表面,传热效率好,轻量化程度高;同时,与发动机工作同步,具有独立散热能力,更适用于地面停机、起飞滑跑等散热条件差的工况下。但目前针对航空发动机面式空气-滑油散热器的研究仍然较少。因此,本文基于分区模拟的方法开展了其传热特性分析,研究在不同分块模式下散热性能的等效性。数值分析的结果表明,采用4分块、7分块以及直平面代替弧面等条件下散热器和滑油温度分布及变化趋势都基本相似,且温度差都在1 K以内,通过滑油侧与空气侧计算出的单元散热器散热量偏差也都在5 ...
廖亦戴 +4 more
core
Thermal Stress Analysis of Transversally Corrugated Tube in Solar Receiver Under Semi-Circumference Heating [PDF]
ObjectiveIn daily operation, the outer wall of solar receiver tube is subjected to uneven heat flux between the inner and outer sides at cylindrical receiver, which leads to the uneven distribution of wall temperature and large temperature gradient.
CHEN Jiashu +4 more
core +1 more source