Assumptions 引出 We make the following assumptions about.."process in this paper 不考虑因素 61: We do not take into account interactions between factors 12: The influence of . can be neglected 例3:…is“ ideal"" in…, can be neglected b.为了简化模型,之后反驳不正确,但是合理 B 1: In fact ( in reality )factors effect each others, but in order to simplify the model, we ignore the interactions between factors F] 2: In fact in reality factors effect each others, but in order to simplify the model, we ignore the interactions between factors. c.近似 例1 can be approximated as a liner function of B 2:..are assumed to be the same. In practice there is a slight difference 例3 can be approximated as a liner function of d.细致考虑(可附原因) B 1: An airport consists of 1 to 10 concourses, each of with consists of 2 to 50 gates.Gates in the same concourse are generally located close to one another, while the travel time between concourses can be quite lengthy. Hence, we assume that inter-concourse travel is much lengthier than intra-concourse travel 1 2: A average fast walking speed is 250ft/min(3mph), but average speed when arms are immobilized (as when pushing a wheelchair) is only 180 ft/min(2 mph) Gross and Shi 2001].We assume that an escort walks at these speeds B 3: An escort can operate only one wheelchair at a time. U.S. Dept. of transportation guidelines discourages leaving WPs unattended Hence, the escort takes a WP to the connecting flight and remains until the flight leaves e直接定义(假设) w1: To measure the...we define 12: Yearly industry statistics can be used valid 6j3: Sth may be represented by 例4:… are independent and randomly distributed 总结: Add itional assumptions are made to simplify analysis for individual sections. These assumptions will be discussed at the appropriate locations
Assumptions 引出： We make the following assumptions about……process in this paper. a. 不考虑因素 例1：We do not take into account interactions between factors. 例2：The influence of …can be neglected 例3：…is “ideal” in …, …can be neglected. b. 为了简化模型，之后反驳不正确，但是合理。 例 1：In fact（in reality）factors effect each others, but in order to simplify the model ,we ignore the interactions between factors. 例2：In fact in reality factors effect each others, but in order to simplify the model ,we ignore the interactions between factors. c. 近似 例1：……can be approximated as a liner function of …. 例 2： …are assumed to be the same. In practice, there is a slight difference. 例3：……can be approximated as a liner function of …. d. 细致考虑（可附原因） 例 1：An airport consists of 1 to 10 concourses, each of with consists of 2 to 50 gates. Gates in the same concourse are generally located close to one another, while the travel time between concourses can be quite lengthy. Hence, we assume that inter-concourse travel is much lengthier than intra-concourse travel. 例 2：A average fast walking speed is 250ft/min(3mph), but average speed when arms are immobilized (as when pushing a wheelchair) is only 180 ft/min (2 mph) [Gross and Shi 2001]. We assume that an escort walks at these speeds. 例 3：An escort can operate only one wheelchair at a time. U.S. Dept. of transportation guidelines discourages leaving WPs unattended. Hence, the escort takes a WP to the connecting flight and remains until the flight leaves. e.直接定义(假设)： 例1：To measure the……,we define…… 例2：Yearly industry statistics can be used valid. 例3：Sth may be represented by 例4：….are independent and randomly distributed 总结： Additional assumptions are made to simplify analysis for individual sections. These assumptions will be discussed at the appropriate locations