Results 81 to 90 of about 93,069 (162)
Geographic risks to functional groups of mammals and birds from habitat loss in Mexico
Conservation Biology, EarlyView.Abstract There is a need to quantify the impact of habitat loss due to anthropogenic factors on different aspects of biodiversity, such as functional trait diversity represented by functional groups (FGs). We developed a metric to assess the weighted risk of loss of habitat for 33 FGs of mammals and 36 FGs of birds in Mexico based on potential ...
Fernando Mayani‐Parás +4 more
wiley +1 more source
Local algorithm for segmented image interpolation(分割图像插值的一种局部算法)
Zhejiang Daxue xuebao. Lixue ban, 2002 对于医学序列切片,图像上像素之间的间隔常常小于切片之间的距离,而在图像处理中,常常需要它们有一致的分辨率. 对于已分割的切片图像,插入的切片图像也应是已分割的图像.本文提出了一种图像插值的局部算法,该算法在产生新插入图像每点的分割信息与颜色信息时,计算只与相邻切片图像的局部像素值有关. 因此既保持了相邻切片的物体形状过渡自然,又具有良好的数值稳定性.应用该算法于医学序列切片进行插值时,可达到良好的视觉效果.算法已成功应用于医学数据的三维重建系统.
LIJiang-yun(李将云) +2 more
doaj +1 more source
Principal Physical Study and Burnup Calculation Analysis on Traveling-Wave Reactor [PDF]
, 2015 行波堆是快堆的一种，但具有常规快堆所不具备的特点，它是是一种趋近理想状态的先进核能系统，其焚烧策略可以实现一次装料连续运行数十年。本文使用蒙特卡罗计算程序MCNPX(MentoCarloNeutron-PhotonTransportCode)及其内耦合的燃耗计算程序CINDER90为计算工具，对行波堆的物理性质进行了初步研究，并对用于研究的计算工具的计算性能做了初步的探讨。 首先，本文参照泰拉能源原型堆的组件大小对其进行组件的均匀化，通过建立不同燃料棒尺寸，其他堆芯参数都相同的堆芯模型 ...
沈道祥
core
Conservation Biology, EarlyView.Abstract Achieving global conservation policy goals requires the ability to set and measure progress toward science‐based targets for biodiversity. The species threat abatement and restoration (STAR) metric was developed to enable actors to set science‐based targets for species.
Louise Mair +17 more
wiley +1 more source
International Journal of Applied Linguistics, EarlyView.ABSTRACT This computational linguistic study analyzes 8743 Rednote posts to examine how sentiment, emotion, and content domain collectively shape social comparison dynamics on social media. We identify four key findings: (1) an emotional gradient, where upward comparison content exhibits the highest sentiment scores and downward comparison the lowest; (
Michelle Mingyue Gu +7 more
wiley +1 more source
智能科学与技术学报, 2021 在以往的地铁列车自动驾驶研究中，驾驶数据通常通过仿真生成单条运行曲线、对人工驾驶数据进行采样得到，不但实现方式比较复杂，而且效率较低、通用性不强。受AlphaZero系统启发，创新性地提出了人工生成虚拟地铁运行数据的思想。首先，根据一种五段式地铁列车速度曲线的运行方法，实现了虚拟数据的计算；然后，结合人类专家的经验设置牵引制动的区间分级、实际运行速度的分级、车站间距及变速距离分级等实际参数，缩小曲线数据范围，使其合理化；最后，通过Python编程得到大量数据，保存为数据集，绘制地铁列车运行时间频次分布图。
芦玉琦, 陈德旺, 赵钊林
doaj
Calculation of Young's Modulus and Coefficient of Linear Expansion on Several Solid Solution with Cubic Structure [PDF]
, 2015 杨氏模量和线膨胀系数是表征金属材料重要的物理量。但是，目前已有的二元及多元合金固溶体的杨氏模量和线膨胀系数的实验数据十分有限。因此，利用合理的理论模型来实现对杨氏模量和线膨胀系数的计算并建立性能数据库十分重要，能够为材料设计提供必要的基础信息。本课题组在应用相图计算技术建立热力学数据库和指导合金的成分设计方面取得了不错的成效。本研究基于相图计算的研究方法，考虑温度和成分两个变量的影响，开展合金溶体相的杨氏模量和线膨胀系数的计算。其具体研究成果如下： (1)借鉴计算相图(CALPHAD)方法的研究思路 ...
林明娜
core
Accountability in Government Use of AI: Citizen Concerns and Preferences
Public Administration, EarlyView.ABSTRACT Government adoption of AI opens the “pandora's box” of accountability, a core aspect of public value. Despite the centrality of governmental AI accountability, citizens' concerns and preferences in holding governments accountable for AI usage remain poorly understood.
Naikang Feng, Yanto Chandra
wiley +1 more source
Zhejiang Daxue xuebao. Lixue ban, 2006 设G是一个2-（v, k，1）设计的可解区组传递自同构群，且k ≥3.若，则v = pn，其中p为素数.进一步，当n为一个素数的幂，则G为旗传递或者G≤ AΓL(1，pn).
LIUWei-jun(刘伟俊) +1 more
doaj +1 more source
[Artificial intelligence in wearable electrocardiogram monitoring]. [PDF]
Sheng Wu Yi Xue Gong Cheng Xue Za Zhi, 2023 Wang X +6 more
europepmc +1 more source