Libraries are places in which all kinds of academic information are gathered, providing people with a broad platform for accessing a variety of knowledge. In addition to the knowledge in daily work, study and life, so...Libraries are places in which all kinds of academic information are gathered, providing people with a broad platform for accessing a variety of knowledge. In addition to the knowledge in daily work, study and life, some important historical materials are collected in libraries, and all of them are of important significance for studies of social development from multiple aspects. Influenced by information technology, the forms of library resources are no longer limited to books and documents, and digital resources have changed into part of the storage of library information. With the purpose of solving the problems in the current management of non-book resources, it is necessary for management personnel of libraries to actively change management model and make more scientific and sound resource management programs. Based on this point, an analysis is made by the author in this paper.展开更多
为解决客户在线订舱退订概率较高情形下的远洋集装箱班轮舱位分配问题,本文提出一种按有无退订费的两类即期市场客户新划分方式,依据不同时段市场运价指数及其变差系数,设计两类即期市场客户退订概率预测方法,结合货物未出现概率,以船...为解决客户在线订舱退订概率较高情形下的远洋集装箱班轮舱位分配问题,本文提出一种按有无退订费的两类即期市场客户新划分方式,依据不同时段市场运价指数及其变差系数,设计两类即期市场客户退订概率预测方法,结合货物未出现概率,以船公司收益最大化为目标,建立两阶段舱位分配及即期市场定价的非线性规划模型,以东方海外船公司Paclflc China North 1(PCN1)航线为算例,对模型进行分析验证。结果显示:相较于没有退订费,收取退订费的远洋集装箱班轮舱位分配可以提高船公司收益10%以上,船公司设置的长期合同客户置信参数存在一个合理的取值,即期市场客户运价敏感系数增大将导致船公司总收益下降,退订费与船公司即期市场收益呈近似线性关系。研究结论可为船公司班轮运输舱位分配与定价决策提供有益的参考。展开更多
文摘Libraries are places in which all kinds of academic information are gathered, providing people with a broad platform for accessing a variety of knowledge. In addition to the knowledge in daily work, study and life, some important historical materials are collected in libraries, and all of them are of important significance for studies of social development from multiple aspects. Influenced by information technology, the forms of library resources are no longer limited to books and documents, and digital resources have changed into part of the storage of library information. With the purpose of solving the problems in the current management of non-book resources, it is necessary for management personnel of libraries to actively change management model and make more scientific and sound resource management programs. Based on this point, an analysis is made by the author in this paper.
文摘为解决客户在线订舱退订概率较高情形下的远洋集装箱班轮舱位分配问题,本文提出一种按有无退订费的两类即期市场客户新划分方式,依据不同时段市场运价指数及其变差系数,设计两类即期市场客户退订概率预测方法,结合货物未出现概率,以船公司收益最大化为目标,建立两阶段舱位分配及即期市场定价的非线性规划模型,以东方海外船公司Paclflc China North 1(PCN1)航线为算例,对模型进行分析验证。结果显示:相较于没有退订费,收取退订费的远洋集装箱班轮舱位分配可以提高船公司收益10%以上,船公司设置的长期合同客户置信参数存在一个合理的取值,即期市场客户运价敏感系数增大将导致船公司总收益下降,退订费与船公司即期市场收益呈近似线性关系。研究结论可为船公司班轮运输舱位分配与定价决策提供有益的参考。
