管理现代化的一条主要途径是实现管理信息系统(MIS),开发 MIS 大体上有二种方法。其一是系统开发生命周期(SDLC)。这种方法理论完善,实际应用也很广泛,可是它仍然存在一系列弱点,例如:开发周期长;系统需求难以完全准确地描述;生成的系...管理现代化的一条主要途径是实现管理信息系统(MIS),开发 MIS 大体上有二种方法。其一是系统开发生命周期(SDLC)。这种方法理论完善,实际应用也很广泛,可是它仍然存在一系列弱点,例如:开发周期长;系统需求难以完全准确地描述;生成的系统难以真正满足用户要求,随着第四代计算机语言(4GL)的诞生和发展,原型法开发方法受到了人们的青睐,它以模型为基础,让用户和开发人员通过实际运行模型而产生对系统的逐步完全准确的需要,以多次模型迭代最后开发出完整的 MIS。然而原型法本身也带来一些困难和问题,例如,项目的宏观控制;系统的最终目标的确定以及计算机系统的选择。展开更多
The basic theory and effect of the new farming method of ＂Fenlong＂ cultivation which has been included in the main extension technology of Ministry of Agriculture of the People＇s Republic of China is fully illustra...The basic theory and effect of the new farming method of ＂Fenlong＂ cultivation which has been included in the main extension technology of Ministry of Agriculture of the People＇s Republic of China is fully illustrated for the first time, and it is the fourth set （generation） of farming modes and methods following manpower, animal and mechanical （tractor） farming. It follows the natural law to achieve soil activation, water saving, oxygen increase, warming and desalination through the active use of natural resources like soil, rainfall and solar energy, thereby promoting a new round of natural agricultural production and quality improvement and water con- servation, which has crop yield increase by 10%-30%, quality improvement of 5%, natural precipitation retaining increase by100%. The characteristics and mechanism are the use of spiral drill for one-time completion of the land preparation by drilling vertically to 30-50 cm of soil layer through high speed peeling. After instant high temperature and many fierce impacts, mechanical frictions, it could achieve the multiplication of the number of loose soil, soil physical modification and expansion of the soil nutrients, reservoirs, oxygen, microorganisms （＂Four pools＂）. Fenlong cultivation can give birth to new farming culture and civilization, and it can achieve the physical ＂desalinized＂ transformation and utilization of saline soil. The formation of Fenlong green farming technology system makes it possible to invent the farming tools of ＂serf-propelled Fenlong machinery＂ that has got the patent, and it is the method for farmland （dry land, paddy field） Fenlong cultivation, saline-alkali soil smash-ridging cultivation and for the abundance of grass ecology on degraded grassland. The application of Fenlong ＂4＋1＂ （arable, saline-alkali soil, grasslands, Sponge City＋rivers） green development in China can achieve the ＂double safety＂ of food and living space.展开更多
文摘管理现代化的一条主要途径是实现管理信息系统(MIS),开发 MIS 大体上有二种方法。其一是系统开发生命周期(SDLC)。这种方法理论完善,实际应用也很广泛,可是它仍然存在一系列弱点,例如:开发周期长;系统需求难以完全准确地描述;生成的系统难以真正满足用户要求,随着第四代计算机语言(4GL)的诞生和发展,原型法开发方法受到了人们的青睐,它以模型为基础,让用户和开发人员通过实际运行模型而产生对系统的逐步完全准确的需要,以多次模型迭代最后开发出完整的 MIS。然而原型法本身也带来一些困难和问题,例如,项目的宏观控制;系统的最终目标的确定以及计算机系统的选择。
基金Supported by the National Key Technology R&D Program of China(2014BAD06B05)the Major Project of Science and Technology of Guangxi(2017AA22015)~~
文摘The basic theory and effect of the new farming method of ＂Fenlong＂ cultivation which has been included in the main extension technology of Ministry of Agriculture of the People＇s Republic of China is fully illustrated for the first time, and it is the fourth set （generation） of farming modes and methods following manpower, animal and mechanical （tractor） farming. It follows the natural law to achieve soil activation, water saving, oxygen increase, warming and desalination through the active use of natural resources like soil, rainfall and solar energy, thereby promoting a new round of natural agricultural production and quality improvement and water con- servation, which has crop yield increase by 10%-30%, quality improvement of 5%, natural precipitation retaining increase by100%. The characteristics and mechanism are the use of spiral drill for one-time completion of the land preparation by drilling vertically to 30-50 cm of soil layer through high speed peeling. After instant high temperature and many fierce impacts, mechanical frictions, it could achieve the multiplication of the number of loose soil, soil physical modification and expansion of the soil nutrients, reservoirs, oxygen, microorganisms （＂Four pools＂）. Fenlong cultivation can give birth to new farming culture and civilization, and it can achieve the physical ＂desalinized＂ transformation and utilization of saline soil. The formation of Fenlong green farming technology system makes it possible to invent the farming tools of ＂serf-propelled Fenlong machinery＂ that has got the patent, and it is the method for farmland （dry land, paddy field） Fenlong cultivation, saline-alkali soil smash-ridging cultivation and for the abundance of grass ecology on degraded grassland. The application of Fenlong ＂4＋1＂ （arable, saline-alkali soil, grasslands, Sponge City＋rivers） green development in China can achieve the ＂double safety＂ of food and living space.
