Results 51 to 60 of about 65,934 (177)

Thermodynamic Assessments of Phase Diagrams in Some Samarium Alloys Systems [PDF]

open access: yes, 2015
钐及其合金由于特殊的物化性质,已经在稀土永磁材料、钢铁和有色金属合金、原子能工业、生物研究和医疗、功能陶瓷等众多领域获得了广泛的应用。作为材料设计的理论依据,相图是金属材料开发设计中不可或缺的重要工具。因此为了实现对钐合金的成分设计、组织优化以及性能改进,开展稀土Sm基合金的热力学相图计算,是一项极具价值的研究工作。 本论文利用相图计算的CALPHAD方法,对部分稀土Sm基合金的相图进行了热力学优化与计算,主要研究结果如下: (1)基于文献报道的Sm-X(B,Bi,Nd,Sb,Sn ...
陈梦华
core  

Emerging applications of large language models in ecology and conservation science

open access: yesConservation Biology, EarlyView.
Abstract Large language models (LLMs) mark a major development in artificial intelligence, with potentially transformative implications for ecology and conservation science. Built on advanced deep‐learning architectures, these models can support a wide range of tasks. We reviewed emerging applications of LLMs, drawing on the wider scientific literature
Christos Mammides   +5 more
wiley   +1 more source

Using Genetic Algorithms to Pick Stocks and Manage Portfolio in Technical Analysis System [PDF]

open access: yes, 2016
在投资领域,如何高效地进行资产配置、获得高收益并控制风险是每个投资者进行投资决策时最为关注的问题,如何有效地选股和进行投资组合管理是一个广泛存在的难题。技术分析是主流的选股方法之一,是通过分析历史的市场数据如股价、成交量等,来预测股票未来的趋势的一种投资分析方法;遗传算法是模拟自然界物种进化的随机全局搜索最优解的算法,目前广泛应用于组合优化、机器学习、自适应控制、信号处理等领域;证券投资组合优化问题的实质就是有限的资产在具有不同风险收益特性的证券之间的优化配置问题 ...
王振华
core  

Reconceptualising Motivation as Material‐Semiotic Entanglements: Translanguaging in Graduate TESOL Education

open access: yesInternational Journal of Applied Linguistics, EarlyView.
ABSTRACT Multilingual students in Anglophone universities often operate in survival mode. While translanguaging supports learning, critical gaps remain in understanding how translanguaging pedagogies transform and sustain motivation in English‐dominant contexts.
Melissa Jufenna Slamet, Julie Choi
wiley   +1 more source

基于磁场与电弧互作的真空断路器触头结构设计

open access: yesGaoya dianqi, 2022
针对因真空断路器大电流故障开断过程中灭弧室断口场域磁感应强度弱,导致磁场对电弧等离子体有效控制力减弱的问题,将NSPSO多目标优化方法与磁场有限元分析相结合,以12 kV/1 250 A/31.5 kA典型技术参数的中压真空断路器灭弧室纵磁触头系统为对象进行结构优化设计,以触头片开槽长度、斜槽深度、触头片开槽偏转角、触头杯座厚度为优化设计变量,以灭弧室断口中心截面纵磁最大值与磁场有效作用面积同时达到最大值为优化设计目标,求得Pareto前沿非支配优化解集 ...
臧谦   +6 more
doaj  

The discussion on the construction of human resource management ystem of OPPLE Lighting Co., Ltd [PDF]

open access: yes, 2016
随着改革开放越来越深入,外资照明集团不断进入并参与照明行业的市场竞争,各类新型的照明科技,如高精细LED、商业化整体照明解决方案、特殊化专业化照明项目等对现有照明产品的替代性越来越强,从单一产品到整体解决方案的改革趋势加剧,传统的照明企业所面临的市场竞争日益激烈。产品、服务、经营模式均受到挑战,转型已成为必然趋势。 OP照明公司顺应市场大趋势,将高精细LED产品与配套整体照明方案作为公司未来战略发展方向。这一转型对OP照明公司的管理团队提出了更高的要求。但现有的管理团队在应对转型期公司的发展支持上 ...
彭丽
core  

Twelve Years Revisited: Translanguaging as Relational Pedagogy for Sustaining Language Learning Motivation

open access: yesInternational Journal of Applied Linguistics, EarlyView.
ABSTRACT This study examines how foreign language teachers’ beliefs about the medium of instruction and translanguaging evolve over time by revisiting three in‐service teachers twelve years after their initial interviews. Using a qualitative longitudinal design, the study traces how translanguaging was initially framed as pedagogically deficient but ...
Danping Wang
wiley   +1 more source

基于一维搜索算法的张弦桁架离散变量优化

open access: yesJianzhu Gangjiegou Jinzhan, 2011
本文采用Matlab语言编写张弦桁架结构模型程序,对张弦桁架在各荷载工况下的受力性能进行了分析;首先采用Matlab语言编写了张弦桁架结构各种约束条件程序,同时编写了基于离散变量的张弦桁架优化设计程序,采用基于离散变量的一维搜索优化算法对拟定的张弦桁架计算模型进行了优化,优化结果表明基于离散变量的一维搜索优化算法,由于目标函数和约束函数的单调性质,得到的解显然是最优解,而且优化结果可以直接应用于结构实际设计。最后,在确保编写的离散变量优化程序正确的前提下,对不同矢高的张弦桁架结构进行了离散变量优化设计 ...
刘树堂, 侯贯泽, 王林建
doaj  

The Study of Mechanic Remuneration System 0ptimization in Shenzhen S Bus Company [PDF]

open access: yes, 2015
深圳S公交公司系深圳市最大的公交公司,经过40年发展,已成为国内知名公交企业,并建立起规范的现代化企业管理机制。该公司修理类员工为公司三大核心生产岗位之一,主要承担着营运车辆维修及保养重任,是公司营运生产及经营成本管控的重要保障力量。目前,该公司修理类员工未能很好地承担企业的营运车辆维修及保养工作,主要是因为修理类员工薪酬体系存在薪酬激励性不足、薪酬模式不合理、薪酬公平性欠缺三大问题,现行薪酬体系已不符合深圳市新时期公交行业财政补贴政策情况下的企业经营需求。以深圳S公交公司修理类岗位作为研究对象 ...
庄华宙
core  

Comparing the Effects of Collaborative and Independent Writing on EFL Learners’ Individual Writing Performance: An Intervention Study

open access: yesInternational Journal of Applied Linguistics, EarlyView.
ABSTRACT Collaborative writing has attracted increasing attention in English as a Foreign Language (EFL) instruction due to its potential to enhance learners’ writing competence. However, few studies have examined the comparative effects of collaborative versus independent writing on EFL learners’ individual performance, especially in higher‐order ...
Ting Huang, Chenze Wu, Wenkang Zhang
wiley   +1 more source

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