1) logistics quantity of year
年物流量预测
2) annual runoff prediction
年径流量预测
1.
Application of the time series decomposable model for the annual runoff prediction in Wulasitai River;
时间序列分解模型在乌拉斯台河年径流量预测中的应用研究
2.
This paper takes annual runoff prediction and an optimal allocation of water as research aims,the work and technical implementation including the following three aspects:First,on the basis of the research on the irrigation area in annual runoff and influencing factors,analyzes the characteristics of the annual runoff,and compara the time rank,artificial neural network and support vector machine.
本文以年径流量预测与灌区优化配水为研究目标,主要进行的工作及技术实现包括以下三个方面:首先,在对灌区年径流量相关概念与影响因素研究的基础上,分析了年径流量具有的特点,同时比较分析了年径流量的预测方法,针对年径流量具有的特点,选取适宜的预测方法,确定采用支持向量机方法进行年径流量预测;其次,年径流量的变化情势受气候、下垫面、太阳活动与人类活动等因素的影响,这些影响因素的复杂性与不确定性,给年径流量预测带来了极大的难度,基于支持向量机方法能够较好地解决小样本、高维、非线性问题,建立年径流量SVM预测模型,所建立的模型预测结果精度高,证明了该方法应用的合理性和有效性;最后,针对灌区水资源不足时的非充分灌溉情况,为了使灌区取得最大的灌溉经济效益,建立灌区优化配水模型,利用遗传算法对所建立的优化模型求解,结果显示采用遗传算法可以获得较好的寻优效果,有效提高了灌区灌溉经济效益。
3) logistics amount prediction
物流量预测
1.
Thinking of resource and environment constraints of logistics node,the paper brings forward a universal logistics amount prediction method system of logistics node.
考虑物流节点的资源环境约束条件,提出具有普适性的物流节点物流量预测方法体系,将物流节点物流需求分为趋势性、转移性和诱发性物流需求,引入生命周期理论确定物流节点成长曲线,基于供需动态均衡构建Logis-tics模型,确定物流节点物流量,并以豫南口岸物流中心为例进行实证分析,预测结果表明,较之以往预测方法,该方法更为适合物流节点发展的实际,可为物流节点选址、规模的确定、布局和合理化运营提供依据。
4) logistics distribution forecast
物流量分布预测
1.
The paper introduces the principle and method of Entropy-maximizing(EM)model,improves the gravitational model of the four-phases of logistics distribution forecast.
示例表明该方法在物流量分布预测中具有较好的应用前景。
5) logistics demand forecasting
物流需求量预测
1.
Then it briefly describes the general method and process of logistics system forecast, and compares and analyzes many kinds of common logistics forecast methods, and establishes a logistics demand forecasting models based on Grey Residual-Back Propagation Neural Netwo
物流需求量预测是第三方汽车物流企业有效规划运能、制定目标和计划,提高企业的核心竞争力的前提条件。
6) annual runoff forecast
年径流预测
1.
The problem of annual runoff forecast considering the influence of the uncertainty of original data was studied by using the rough set theory in this paper.
年径流预测对合理开发和优化利用水资源、更好地制定区域社会经济规划具有十分重要的指导意义。
2.
According to the characteristics of the long-time runoff forecasting,a new annual runoff forecasting model based-on the combination of genetic algorithm and neural network is proposed in this paper.
根据径流中长期预测的特点,将遗传算法和神经网络相结合,提出一种年径流预测新算法———遗传神经网络优化预测方法。
补充资料:经验指数预测法(见发生量预测)
经验指数预测法(见发生量预测)
经验指数预测法见发生量预测。
说明:补充资料仅用于学习参考,请勿用于其它任何用途。
参考词条