Results 21 to 30 of about 21,006 (128)
Generalized LHSS method for non-Hermitian positive definite linear systems(求解非埃尔米特正定方程组的广义LHSS迭代法)
Zhejiang Daxue xuebao. Lixue ban, 2018 基于矩阵的埃尔米特和反埃尔米特分解，李良等给出了一类求解非埃尔米特正定方程组的LHSS迭代法，在系数矩阵的埃尔米特和非埃尔米特之间进行了非对称迭代，在较松弛的约束条件下即可获得收敛结果.本文对该方法做进一步研究，给出了一类求解非埃尔米特正定方程组的广义LHSS迭代方法.数值结果表明，系数矩阵经恰当分解，在处理某些问题时广义LHSS迭代法优于HSS迭代法.
CHULu(初鲁) +2 more
doaj +1 more source
Scenarios and strategies for future‐proofing ecosystem management under climatic novelty
Conservation Biology, EarlyView.Abstract Climate change is driving unprecedented declines in dominant, habitat‐forming foundation species across marine and terrestrial ecosystems globally. As climatic novelty becomes the norm, ecosystem reassembly will become increasingly common. Predicting and understanding these transitions, and their implications for future ecosystem functioning ...
Lauren T. Toth +14 more
wiley +1 more source
Drivers of bat researchers’ intent to adopt field hygiene practices
Conservation Biology, EarlyView.Abstract Infectious disease is a growing threat to wildlife, with zoonotic transmission most likely at the human–wildlife interface. One underappreciated activity at this interface is fieldwork with wild animals, but associated risks can be mitigated through field hygiene (FH) practices, such as using personal protective equipment and other appropriate
Joanna L. Coleman +6 more
wiley +1 more source
Evaluating synthetic substitutes to reduce illegal harvesting and support species recovery
Conservation Biology, EarlyView.Abstract Providing synthetic substitutes is a widely promoted strategy to shift consumer demand away from wildlife products derived from threatened species. Yet, there is little evidence on whether product substitution prevents illegal or unsustainable harvesting and contributes to the recovery of threatened populations.
Aditya Shekhar Malgaonkar +17 more
wiley +1 more source
Conservation Biology, EarlyView.Abstract Procedural, distributional, recognitional, and epistemic justice aspects of conservation interventions are well documented in contexts where pastoralism is a key livelihood and way of life. Geospatial analyses and representations of wildlife conservation and restoration that are increasingly applied in pastoralist rangeland socioecological ...
Ryan R. Unks
wiley +1 more source
Dizhen xuebao以饱和两相介质土力学模型为基础，建立了一维P波和S波波动的动力方程组。针对该动力方程组，采用伽辽金加权余量法进行空间离散，之后采用中心差分法与纽马克（Newmark）线性加速度法（γ＝1/2，β＝1/6）相结合的时间步进法进行时间离散，得到了求解有限元动力方程的全显式时域逐步积分公式。接着结合透射人工边界求解饱和两相介质近场波动问题，并用内源波动和外源散射两个数值算例对该算法的合理性进行了验证。其中：内源波动算例是将一维柱体在阶跃荷载和正弦荷载作用下的数值解与相应的解析解进行对比，二者计算结果基本一致 ...
Bo Zhang +3 more
doaj +1 more source
International Journal of Applied Linguistics, EarlyView.ABSTRACT Research on English‐Medium‐Instruction (EMI) highlights inadequate support for students transitioning from L1‐medium‐instruction to EMI. To date, little research has focused on how L2 students’ adaptation to an EMI environment influences their L2 learning motivation (LLM).
Kevin W. H. Tai
wiley +1 more source
International Journal of Applied Linguistics, EarlyView.ABSTRACT This study conducted linguistic analyses of the written corrective feedback (WCF) for Chinese as a second language (CSL) provided by chat generative pre‐trained transformer (ChatGPT) and human teachers (including preservice teachers and senior teachers).
Ling Zhang +2 more
wiley +1 more source
齿轮可靠度计算的概率有限元法（第Ⅱ部分:齿面接触疲劳强度的计算）
Jixie chuandong, 1993 本文将概率有限元法用于齿轮接触疲劳强度可靠度的计算。以功率、转速和疲劳极限为随机变量,在求解接触问题的有限元—线性规划法基础上,建立了相应的概率有限元基本方程及求解方法。该方法不仅可用于齿轮接触疲劳的可靠度计算,也可用于其他弹性体接触问题的可靠度计算。
吴立言, 刘更, 王步瀛
doaj
On-line support vector regression with multiple samples(基于多样本的在线支持向量回归算法)
Zhejiang Daxue xuebao. Lixue ban, 2011 提出一种针对多样本的在线支持向量回归(SVR)算法，以解决目前SVR在线训练算法每次只能处理1个样本的问题.算法以拉格朗日乘数法和库恩-塔克(KKT)条件为基础，逐步改变样本的系数，并在每次迭代中保持原来的样本满足KKT条件，最终使所有训练样本满足KKT条件.实验表明，该方法可有效更新SVR模型，且计算效率相比于基于单样本的在线回归算法有较大的优势.
CAOKui-kang(曹葵康) +1 more
doaj +1 more source