Results 21 to 30 of about 106,544 (192)
Shuitu Baochi Xuebao, 2003 在分析了目前铁路工程中土壤风蚀预测常用方法(直接类比预测法)所存在问题的基础上,提出了一种新的适用于铁路工程(或其它交通工程建设)中土壤风蚀预测的计算方法--影响因子对比预测法.通过算例验证表明,其具有较好的适用性和预测精度.
奚成刚, 许兆义, 杨成永
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热带太平洋海洋叶绿素对
Haiyang yu huzhao关于热带太平洋海洋叶绿素对海表面温度(sea surface temperature, SST)年平均场和年际变率的影响，学术界存在着广泛的争议，模拟结果表现出明显的模式依赖性；且对于季节变化上叶绿素如何影响SST的关注较少。为深入研究热带太平洋叶绿素的气候效应，本文基于区域海洋模式系统(Regional Ocean Modeling System, ROMS)构建了海洋物理-生态耦合模式；通过在敏感性试验中设置不同的叶绿素浓度分布，分析了叶绿素对热带太平洋SST的年平均和季节变化的影响。结果表明 ...
张 雯哲 +5 more
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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
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Dianci bileiqi, 2008 介绍了目前国内外绝缘子泄漏电流值预测的三种方法。分析后指出,目前预测方法存在预测机理不清楚、预测模型引入的属性不精确、预测模型的历史数据库数量大、维数高,信息挖掘困难等问题。针对这些问题提出了改进建议:预测方法机理应清楚明了,尽量实现可视化;应使用一种高效的方法对数据库中的数据进行处理,实现规则的有效提取;可将预测系统和在线监测系统结合起来,将在线监测系统测得的泄漏电流及其他环境参数作为预测系统的历史数据库,提出了未来预测方法的发展方向。
王黎, 李卫国, 戴子勤
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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 Knowledge of species distributions is essential for informing policies on nature conservation and restoration. However, updating them on a regular basis and doing so in a harmonized manner at the international level is difficult. The European Bird Census Council integrated national monitoring data covering 5 years to update farmland bird ...
Sergi Herrando +54 more
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四川大学学报. 自然科学版, 2006 使用Dempster-Shafer证据推理理论组合多个基因预测程序可以组合来自多个信息源的基因预测信息,多个基因预测程序组合后的预测效果明显好于单个基因预测程序的效果.
翁洋
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, 1994 本文提出了一个从正常固结海底土在等幅周期载荷作用下的不排水动力特性预测正常固结海底土在其它条件下的动力特性的方法。其中;考虑了非均一的应力水平及排水条件等因素的影响;用该方法对一种取自北部湾的海洋粉质土的动力特性进行预测 ...
黄锋, 赵京, 楼志刚
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Insights for conservation from the Ecological Knowledge Games project
Conservation Biology, EarlyView.Abstract Environmental conservation research requires robust methods for collecting large‐scale behavioral data and engaging diverse stakeholders in decision‐making processes. We (Y.P., A.B.D., and N.B.) created EcoKnowGames (Ecological Knowledge Games), a transdisciplinary project that develops knowledge games for conservation science and data ...
Yuan Pan +4 more
wiley +1 more source
Gaoya dianqi, 2022 针对传统预测方法在变压器油中溶解气体预测时精度不高的问题，提出一种EMD和GCT联合应用的新型预测方法。首先使用EMD将溶解气体浓度、环境温度、油温及负载电流等时序信息分解成平稳的模态分量；然后使用GCT分析模态之间的预测关系，提取每阶模态的格兰杰原因；最后将待预测分量及其格兰杰原因所对应的历史时序输入到时间注意力机制LSTM网络进行预测，并采用改进的蚁狮算法优化网络参数，经叠加重构得到特征气体浓度最终预测结果。实验结果表明：与传统LSTM网络相比，所提方法具有更高的预测精度和可行性。
陈铁 +4 more
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