饲料配方软件为合理利用饲料资源、降低饲粮成本发挥了巨大作用.在掌上电脑上设计和开发了通用型饲料配方系统,系统包含配方计算、配方浏览、数据管理、系统维护和系统升级等主要功能模块.开发了嵌入式数据库访问中间件,提高了掌上电脑上数据操作的效率和系统的稳定性:采用两阶段法和直接计算逆矩阵的方式对配方求解的单纯形算法进行了优化,根据参算原料种类的数量,实际计算一次配方时间约为2～4 s;实现了基于存储卡和网络的两种升级方式,保证了系统原料和饲养标准数据的时效性.在北京市4个郊区县31个养殖场户进行了应用,结果表明,系统稳定实用、操作简易,容易被中小养殖户接受,具有较大的推广价值.

Based on Desktop PC, many feed-formula systems have been developed. It is expensive to be widely applied. The regularly users are only some advanced culturists and professional breed technicians. A general purpose PDA-based feed-formula system has been designed and developed. The framework structure and function modules of the system were introduced. The development and operating environment were indicated. An embedded database middleware was designed and implemented in order to promote developing efficiency and decrease its complexity. Two updating ways, storage card updating and network updating, were adopted by this system. To cut down the unnecessary burden of reinstallation and reconFig. of software on users, the automatic installing has been implemented. The system has been compared with those counterparts based on Desktop PC. The result shows that stabile and practical feed-formula system can be developed based on PDA. Characterized by easy to operate, cheap and light to be taken along, this system is very suiTable for the small and medium scale culturists and breed technicians from feed enterprises.