There are too many problems in raw material supplying , such as , too many sources and types , complex constituent , variation price , large amount of needing , occupied funds , and safe inventory needed , et al . raw material assurance system is established under these circumstances . the main research of this thesis concentrates on the following parts : some optimization algorithms , raw material purchase , raw material inventory and real time early alarm of raw material purchase 在有色冶炼企业的原料供应工作中存在着这样的一些问题：原料来源多；品种多；成分复杂；价格不一；连续生产，对于原料的需要量大；原料采购资金占企业流动资金的比例大，一般达到了80以上；保证连续生产，需要有一定的原料储备量；原料采购策略与企业生产的产品市场价格信息脱钩等。
At last a conclusion is made and advice is offered for the company " s development . before composing this thesis , i investigated company zf " s product sale , materials purchase , valve production and otherwise . i think the hard work is very helpful for accomplishing this thesis 在论文写作实习过程中，笔者深入实际，较为详细地诊断了公司产品在市场开发、阀门销售、原料采购、产品制造以及后勤保障等方面的实际情况，发现了公司在产品制造方面存在的问题，为论文写作打下了坚实的基础。
In 1990 , canon first commenced the used toner cartridge collection and recycling program and introduced it to other places in the world . then canon advocated " green procurement " plan within its global groups and co - operative factories , which means the procurement of materials and parts with a minimal impact on the environment 接着，佳能又在全球世界各集团内部和外协工厂倡导"绿色采购"计划，即在原料采购时，选择那些对环境影响较小的产品，有计划地杜绝有害物质的使用。
Factories to " hard solid , honest commitment , work effectiveness " of entrepreneurship , just the essence of chinese civilization , to be innovative and all products are unique , from market research , product development , design models to raw materials procurement , product testing until the final placement market , are under strict international management procedures to operate , thereby achieving " quality , efficient " business purpose for products in the fierce market competition forever invincible 工厂以“艰苦坚实、诚信承诺、实干实效”为企业精神，传承中华文明的精髓，锐意创新，所有产品均独具特色，从市场调查、产品开发、款式设计到原料采购、产品检验直到最后的市场投放，均严格按国际化管理流程操作，从而达到“质优、高效”的企业目的，使产品在激烈的市场竞争中永立于不败之地。
