作业帮有没有学数学的.....
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有没有学数学的.....
QUESTION :FRESH PRODUCTS ORDERING & TRANSPORT OPTIMIZATION
- All vegetables and fruits are sold at an estimated price of £1.5 per kg,
- Beef is sold for £3 per kg,
- The order and delivery of beef is handled separately.Each order of beef is also charged a £15 fixed delivery cost independently of the order quantity,
- Each pizzeria can place at most one order each day for vegetables and fruits and at most one order each day for beef,
- For each order of vegetables and fruits,the maximum quantity that can be delivered in any given day is 20 kg,and for beef this is 15kg per day,
- Use the daily demand for fresh products for the whole week that you calculate in Question 3.
As you advertise these products as fresh products to customers,your policy is to use them within 48h of their delivery.Following this,those fresh products delivered in a given day to a pizzeria that are left at the nightly closure of the pizzeria can still be used in next day’s pizzas.Every morning,the staff of each restaurant may therefore transport the fresh products left from the previous day to any other restaurant that would need them for its evening pizza production.
However,note that the fresh products cannot be used more than two days in a row.The transportation of the leftovers to other restaurants that might need them is free,because this is done by the staff of the restaurants.
The purpose of this question is to find,each day,how big an order each restaurant (among Carla’s,Enzo’s,Nicoletta’s,Firenze,Sienna,and Napoli) has to place and how much needs to be transported between restaurants from leftovers from the previous day,so that the total weekly ordering cost is minimized and the daily demand of fresh products is satisfied in each restaurant.When you write down your optimization model,do not elaborate on which restaurant should send leftovers to which other restaurants but just treat them as one variable per restaurant and per day:that is how much total leftovers are there per day,how much total of demand is there for the next day,how much do each restaurant order and is there a balance between all these variables; so just look at the total available leftovers,orders and demand per restaurant and per day.
Please write the full optimization model (decision variables,objective function,constraints,and optimal solution) and solve it separately once for the vegetables and fruits orders,and a second time for the beef orders.
哪位大哥能给下decision variables,objective function,constraints,and optimal solution?ps,we got 6 pizzaria,with different demand everday for each restaurant.just ignore it and give me the name or catogories for the functions and constraints.....
因为需要输入到excel里求解,所以考虑下如何输入到excel里...
不过我要的是最后求解的部分
请把全部优化模型(决策变量,目标函数、约束和最优解并解决一次分开的蔬菜和水果的命令,第二次为牛肉的命令。
QUESTION :FRESH PRODUCTS ORDERING & TRANSPORT OPTIMIZATION
- All vegetables and fruits are sold at an estimated price of £1.5 per kg,
- Beef is sold for £3 per kg,
- The order and delivery of beef is handled separately.Each order of beef is also charged a £15 fixed delivery cost independently of the order quantity,
- Each pizzeria can place at most one order each day for vegetables and fruits and at most one order each day for beef,
- For each order of vegetables and fruits,the maximum quantity that can be delivered in any given day is 20 kg,and for beef this is 15kg per day,
- Use the daily demand for fresh products for the whole week that you calculate in Question 3.
As you advertise these products as fresh products to customers,your policy is to use them within 48h of their delivery.Following this,those fresh products delivered in a given day to a pizzeria that are left at the nightly closure of the pizzeria can still be used in next day’s pizzas.Every morning,the staff of each restaurant may therefore transport the fresh products left from the previous day to any other restaurant that would need them for its evening pizza production.
However,note that the fresh products cannot be used more than two days in a row.The transportation of the leftovers to other restaurants that might need them is free,because this is done by the staff of the restaurants.
The purpose of this question is to find,each day,how big an order each restaurant (among Carla’s,Enzo’s,Nicoletta’s,Firenze,Sienna,and Napoli) has to place and how much needs to be transported between restaurants from leftovers from the previous day,so that the total weekly ordering cost is minimized and the daily demand of fresh products is satisfied in each restaurant.When you write down your optimization model,do not elaborate on which restaurant should send leftovers to which other restaurants but just treat them as one variable per restaurant and per day:that is how much total leftovers are there per day,how much total of demand is there for the next day,how much do each restaurant order and is there a balance between all these variables; so just look at the total available leftovers,orders and demand per restaurant and per day.
Please write the full optimization model (decision variables,objective function,constraints,and optimal solution) and solve it separately once for the vegetables and fruits orders,and a second time for the beef orders.
哪位大哥能给下decision variables,objective function,constraints,and optimal solution?ps,we got 6 pizzaria,with different demand everday for each restaurant.just ignore it and give me the name or catogories for the functions and constraints.....
因为需要输入到excel里求解,所以考虑下如何输入到excel里...
不过我要的是最后求解的部分
请把全部优化模型(决策变量,目标函数、约束和最优解并解决一次分开的蔬菜和水果的命令,第二次为牛肉的命令。
数学其实是不难的,只是理论性较强,不要害怕数学,更不要太紧张.只要把分数看开点就可以了,否则不怀则太过于紧张的心情,是无法进行复习的.一紧张,就害怕,数学并不难的,所以不要紧张.每个人的基础不同,学习态度也不同,所以要采用的方法也就不同.要把学习学好就得找到适合自己的学习方法,要根据自己的特点选择适合的方法.就可以取得进步.提高成绩.学习方面的问题.有学习环节,学习态度、 学习方法.你只要从现在把学习转变了,学牢了,当然就简单了,成绩就会提高.
学习的方法应该是“百家争鸣”“百花齐放”.从基础开始——熟悉技能——应用.一定是经过无数次的练习.了解学科的特点,熟记公式,多思考,多挖掘多做题,学习永远都没有捷径,只有练习,练习,再练习.
提供下面的方法：要做好四轮学习:
1.全面复习的基础知识（看课本）.
2.用考试来检验自己第一轮的复习情况.详细分析存在的问题,做好查缺补漏的复习
3.分版块复习.做到同中有异,异中有同.
4.专题复习.综合能力的培养,拓展自己的应用能力.
1.培养兴趣.使自己觉得并不是被迫去接受数学,被迫去完成作业,而变成是自己觉得学数学很爽,主动去学与被迫去学的差别太大了.如果只是被迫去学的话就很容易产生厌恶感,老是想着等到什么时候可以和数学绝缘,这样下去只会让自己越学就越觉得力不从心的.
2.做题.数学的感觉就是靠做题做出来的,数学知识只有在实战中才会变得牢固,少做题而整天去记公式啊,只会令自己知道公式却不知道怎么创造条件去把它用上.多做一定能提高速度和准确率的,有了这两样东西的话数学还怕会考不好吗?在做题中找到成就感,找到学数学的乐趣,这样学起来就会很轻松了.我们高中时数学资料都是做了一大堆的.
3.多请教一下别人.难题也不要想太久了,看看别人是怎样解的对自己也是很有帮助的.
学习的方法应该是“百家争鸣”“百花齐放”.从基础开始——熟悉技能——应用.一定是经过无数次的练习.了解学科的特点,熟记公式,多思考,多挖掘多做题,学习永远都没有捷径,只有练习,练习,再练习.
提供下面的方法：要做好四轮学习:
1.全面复习的基础知识（看课本）.
2.用考试来检验自己第一轮的复习情况.详细分析存在的问题,做好查缺补漏的复习
3.分版块复习.做到同中有异,异中有同.
4.专题复习.综合能力的培养,拓展自己的应用能力.
1.培养兴趣.使自己觉得并不是被迫去接受数学,被迫去完成作业,而变成是自己觉得学数学很爽,主动去学与被迫去学的差别太大了.如果只是被迫去学的话就很容易产生厌恶感,老是想着等到什么时候可以和数学绝缘,这样下去只会让自己越学就越觉得力不从心的.
2.做题.数学的感觉就是靠做题做出来的,数学知识只有在实战中才会变得牢固,少做题而整天去记公式啊,只会令自己知道公式却不知道怎么创造条件去把它用上.多做一定能提高速度和准确率的,有了这两样东西的话数学还怕会考不好吗?在做题中找到成就感,找到学数学的乐趣,这样学起来就会很轻松了.我们高中时数学资料都是做了一大堆的.
3.多请教一下别人.难题也不要想太久了,看看别人是怎样解的对自己也是很有帮助的.