...二版 Ch.7 运输与指派问题 p.8/62 LP 两类限制式： 供给限制式（supply constraint） 需求限制式（demand constraint） 任何符合此特殊形式的LP问题，不论其实际意 义为何，均可称为运输问题 Min 1 1 m n ij ij i j Z c x 1 1 1, 2...
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Building the theory of input-output which suits for demand constraint is a major subject, which decides whether the power business can make the sustainable development in the market economical condition.
建立与需求约束相适应的电力投入产出理论,是电力企业能否在市场经济条件下可持续发展的重大课题。
参考来源 - 云南电力企业投入产出与可持续发展·2,447,543篇论文数据，部分数据来源于NoteExpress
The demand constraint is a little bit different than the previous two, because it's defined for each kind of toy, not as a total for all toy types.
需求约束与上面两个约束有所不同，因为它是为每种玩具而定义的，而不是为所有玩具类型总和进行定义的。
The main problem is a severe capacity constraint that does not allow the Railways to carry more freight even when there is demand.
主要问题在于严重的运能限制，因此即便有需求时，铁路也无法输送更多货物。
On-demand manufacturing could eliminate that constraint, leading to a world where products are always available, nothing ever gets discontinued, and the virtual shelves are always stocked.
按需制造或能去除这种限制，并将我们带向另一个世界，在那里，产品随处都有，永不断货，虚拟的货架也总是满满当当的。
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