Rules Mining-Based Gene Expression Programming for the Multi-Skill Resource Constrained Project Scheduling Problem

Themulti-skill resource-constrained project scheduling problem(MS-RCPSP)is a significantmanagement science problem that extends from the resource-constrained project scheduling problem(RCPSP)and is integrated with a real project and production environment.To solve MS-RCPSP,it is an efficient method to use dispatching rules combined with a parallel scheduling mechanism to generate a scheduling scheme.This paper proposes an improved gene expression programming(IGEP)approach to explore newly dispatching rules that can broadly solve MS-RCPSP.A new backward traversal decoding mechanism,and several neighborhood operators are applied in IGEP.The backward traversal decoding mechanism dramatically reduces the space complexity in the decoding process,and improves the algorithm’s performance.Several neighborhood operators improve the exploration of the potential search space.The experiment takes the intelligent multi-objective project scheduling environment(iMOPSE)benchmark dataset as the training set and testing set of IGEP.Ten newly dispatching rules are discovered and extracted by IGEP,and eight out of ten are superior to other typical dispatching rules.

Weighted Multi-Skill Resources Project Scheduling

In this paper, we present an extension of the classical Resource Constrained Project Scheduling Problem (RCPSP). We present a new type of resource constraints in which staff members are involved. We present a new model where staff members can have several skills with different proficiency, i.e., a staff member is able to perform more than one kind of activity as well as the time need is complete the task assign depends on the staff individual skill. We call this model the Weighted-Multi-Skill Project Scheduling Problem (WMSPSP). In our model, an activity has specific skill requirements that must be satisfied. To solve this problem, we propose a lower bound that uses a linear programming scheme for the RCPSP.

ON THE FUNDAMENTAL DIRECTION OF THE REFORM OF FOREIGN LANGUAGE EDUCATION IN CHINA

This paper discusses some of the unfounded beliefs in current foreign language education policy and English language teaching, i.e. learning a foreign language will make a person cleverer; learning a foreign language will improve one's potential power and creative ability; the younger the child learns a foreign language, the better he will learn the language. In the light of the problems in current foreign language teaching and foreign language education policy, the paper has put forward some reform proposals including 'differentiating cities from rural areas, stressing teaching efficiency and cutting down class hours, and offering a foreign language in schools either as a compulsory or as a selective course according to different needs of students'. In conclusion, the paper holds that the reform measures will bring benefit to the country as well as to its people and should be a guide to the reform of China's foreign language education.