动态报表的打印对象的控制设计

每个信息系统的功能大多不相同,但一般都要把表或视图的联接集作为数据集进行报表打印。由于数据库不同,表结构不同,因此每个报表数据集的字段类型、宽度都不可能完全相同,这导致报表的多样性与复杂性,给报表设计带来诸多不便,通过控制报表的打印对象实现动态报表是一个有效解决该问题的方法。在水晶报表中先创建若干个打印对象,程序运行时对SQL语句获取的动态打印数据集的元素进行枚举,使每个元素与水晶报表上已存在的打印对象进行逐一匹配绑定,进而对绑定的打印对象进行控制,从而实现动态报表的目的。

Ship Coating Scheduling Based on Immune Genetic Algorithm

This paper aims to coating scheduling problem in ship industry, and suggests the dual-resource and multi-objective job shop scheduling model,considering two produce resources: coating ground and workers, then applies an improved immune genetic algorithm, and optimizes the cycle of coatingproject, and the operation cost of coating scheduling. The immune genetic algorithm overcomes the poor ability of local search and lower efficiency ofgenetic algorithm. The clone selection mechanism of immune algorithm was ...