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1)  Expected Value Modeling
期望值建模
2)  expected value model
期望值模型
1.
Suppose the cost w is a stochastic variable according to norm distribution, the network bottleneck capacity expansion problem with stochastic cost is originally formulated as expected value model following some criteria.
带有随机单位扩张费用W的网络瓶颈容量扩张问题可以根据一些概率统计规则,列出它的期望值模型的通用表达式。
2.
The problem is formulated as expected value model,and the objective function is to minimize the setup costs,production costs and inventory holding costs.
建立了问题的期望值模型,目标函数为极小化生产准备成本、生产成本、库存成本的期望值。
3.
The paper provides two types of expected value models with investment outlays,returns of projects and bank loan to be stochastic variables.
给出了随机环境下净现值收益的期望值模型及期望值目标规划模型,并设计了基于随机模拟的遗传算法,给出了模型的一般解决方法,此外,还提供了两个数值例子,用以说明建模思想,并例证算法的有效性。
3)  fuzzy expectation value
模糊期望值
1.
A linear programming model is proposed to find the solution of the top optimization weight vector and a decision making method is determined by the comprehensive fuzzy expectation value of plans.
针对只有部分属性权重信息,而属性指标表示形式多样的多属性决策问题,给出了把属性指标表示为梯形模糊数的方法;并提出了通过一个线性规划模型求解最优权重向量,把方案的综合模糊期望值,用以确定方案的优劣次序的决策方法最后,通过实例表明了该方法的实用性和有效性。
4)  fuzzy expected value model
模糊期望值模型
1.
Considering the error in survey data,this paper presents a bi-level programming model with fuzzy expected value model as upper-level,which objective is minimum difference between estimated and measured link flow,and a user equilibrium assignment model as lower-level by taking link counts as fuzzy number.
考虑调查数据存在的偏差,将路段流量视为一个模糊数,在此基础上构造一个OD反推的双层规划模型,其上层为一模糊期望值模型,即以路段计算流量与实测流量的偏差模糊期望值最小为目标;下层为用户平衡分配模型。
2.
A fuzzy expected value model of oilfield measures planning is put forward, in which the output increment maximizing of oilfield measures is as objective, and the cost and the work amount of the measures are also taken into account.
以油田措施增产最大化为目标,兼顾成本、工作量等目标,建立了油田措施规划的模糊期望值模型,并给出了模型的混合智能算法。
5)  stochastic expected value models
随机期望值模型
1.
An efficient algorithm for solving stochastic expected value models;
一种求解随机期望值模型的有效算法
2.
Solving stochastic expected value models with hybrid intelligent algorithm of based on PSO
基于PSO求解随机期望值模型的混合智能算法
6)  schema regenerate expected value
模式再生期望值
补充资料:电能不足期望值
      表示电力系统由于机组受迫停运而造成的对用户少供电能的期望值,这一指标能说明故障的严重程度,因为电力系统受限制的因素不仅仅是缺电力,更重要的是发电量的短缺。
  
  计算EENS指标时,一般必须先制订发电机组的停运容量概率表和小时负荷曲线。对某一已知停运容量状态,则每小时不足电量等于不足电力乘以此状态的概率,即EENS=(X-R)×P(X)式中X为停运容量,R为系统备用容量,P(X)为停运容量为X的确切概率。
  
  一年中EENS值可由下式计算:式中P(X)为第i时间段第j天第 k小时停运容量大于等于X的概率,Ci为第i时间段的系统装机容量,L为第i时间段第j天第K小时的负荷,m为一年中时间段,ni为第i时间段中的天数,K为一天中的第K小时。
  
  电能不足期望值综合表达了停电次数、平均持续时间和平均停电功率。
  

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