Results 21 to 30 of about 13,205 (168)
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
A Study on Sequencing Problem of Mixed-model Assembly Lines in Company Y Based on Genetic Algorithm [PDF]
, 2016 混流装配线通过对装配生产线的合理组织与排产优化，实现多品种共线装配，以较快的响应速度向客户提供定制的产品和服务。客车需求的多样化和客车市场的细分化，使得混流装配线成为Y公司普遍采用的一种生产方式。由于混流装配线复杂的装配过程会涉及不同的产品以及品种繁多的物料，因此，Y公司在努力改善其生产物流系统，以使混流总装线的运行更加平稳和高效。 本文在此背景下，以Y公司承装车间的Z总装线为研究对象，对其建立排序优化模型并利用遗传算法进行求解。首先，从装配流程和生产规划两方面分析Y公司总装线的管理现状 ...
谢平
core
Perceived costs as drivers of wildlife management preferences in rural Tanzanian communities
Conservation Biology, EarlyView.Abstract Effectively managing human–wildlife interactions is crucial for fostering coexistence on shared landscapes. Management options are most effective when aligned with the preferences of people directly affected by wildlife, yet little is known about how socioecological factors influence these preferences.
Christian Kiffner +10 more
wiley +1 more source
Remanufacturing Strategies under the Carbon Tax Policy [PDF]
, 2016 随着人们对环境问题关注的提升，尤其是开始普遍关注碳排放对大气影响的问题，各个国家出台了一系列控制碳排放的法规。面对政策环境的变化，许多类似于再制造策略的绿色环保策略已经被越来越多前瞻性的企业所重视，并逐渐将之作为企业生产运营过程中可选择的市场策略。因此，本文受此启发并选择侧重研究碳税背景下企业的再制造问题。 首先，本文探究企业如何在统一碳税政策背景下合理选择再制造策略并最优化其生产定价决策。基于此，本文在考虑企业新产品和再制造品碳排量的不同特点后，引入一种创新性的碳税形式，即基于产品碳税政策 ...
王玉
core
Structured machine learning modeling to support conservation of deep‐sea benthic biodiversity
Conservation Biology, EarlyView.Abstract Biodiversity monitoring programs need to deliver accurate, timely, and actionable predictions. To establish a predictive monitoring program for deep‐sea benthos of the Santos Basin, Brazil, we developed a two‐stage structured model that allowed comparison of biodiversity predictions obtained from environmental simulations (2M‐Sim).
Gustavo Fonseca +23 more
wiley +1 more source
Zhejiang Daxue xuebao. Lixue ban, 2017 传统的土地利用优化配置模型无法灵活应对现实场景中多变的优化目标要求，也无法实现土地利用在空间布局上的优化.根据常见的优化目标进行抽象建模，建立了可扩展的多目标体系，并与蚁群算法有机结合，构建了基于可扩展多目标蚁群算法的土地利用优化配置模型，使土地利用配置在不同目标的指导下能够灵活优化，同时实现了土地利用配置在数量结构和空间布局优化上的统一，为土地利用规划提供了更具现实意义的参考方案.最后对该模型，以杭州市萧山区2015年土地利用格局为基础数据进行实例验证.结果表明：模型能够在多目标体系的指导下 ...
MOZhiliang(莫致良) +3 more
doaj +1 more source
Research on Intelligent Optimization of Fiber Bragg Grating Filter and Raman Fiber Amplifier in DWDM System [PDF]
, 2016 随着网络化大数据时代的到来，互联网应用和数据通讯业务的日益剧增，对通信网络的传输容量、速率和带宽提出了更高的需求。为了适应光纤通信系统对高速、大容量、超长距离的传输要求，密集波分复用（DWDM）技术成为一种能够有效挖掘和扩充光纤网络带宽资源并被广泛应用的技术方案。DWDM系统中新型器件的研究和开发进一步推动了光纤传输系统性能的提升。多信道光滤波技术和全波长光放大技术是DWDM突破网络容量瓶颈的两项最核心的技术支撑。其中，多信道光纤布拉格光栅（FBG ...
陈静
core
Multi-Power Coordinated Optimization Operation Strategy Considering Conditional Value at Risk [PDF]
, 2023 In order to achieve carbon peaking and carbon neutrality goals, the power system presents the trend of extensive access of multiple power sources. A multi-power coordination bi-level optimal operation model was proposed.
FENG Caoyi +7 more
core +1 more source
Estimating the total mortality of seabirds following a marine heat wave
Conservation Biology, EarlyView.Abstract Marine heat waves detrimentally affect a range of marine species, including seabirds, and are increasing in frequency and severity. When thousands of dead seabirds wash up on beaches, the public becomes concerned. However, the number of dead birds recorded on beaches is only a fraction of the total mortality; most birds perish at sea.
Jennifer L. Lavers +3 more
wiley +1 more source
Gaoya dianqi, 2007 阐述了新型换流变压器及配套滤波装置的接线方案和滤波器设计特点,在此基础上建立了以初期投资最小为目标函数的滤波装置数学优化模型,在采用遗传算法对优化模型进行优化设计时,考虑到优化模型的特点,采用了混合罚函数法将有约束问题转化成带有罚项的无约束问题的目标函数。最后针对具体的新型高压直流输电平台模型给出了滤波装置优化设计的实例,算例结果验证了该优化设计的正确性。
罗隆福 +5 more
doaj