Jin Jin

For large-scale optimization, CMA-ES has the disadvantages of high complexity and premature stagnation. An improved CMA-ES algorithm called GI-ES was proposed in this paper. For the problem of high complexity, the method in this paper replaces the calculation of a covariance matrix with the modeling of expected fitting degrees for a given covariance matrix. At the same time, to solve the problem of premature stagnation, this paper replaces the historical information of elite individuals with the historical information of all individuals. The information can be seen as approximate gradients. The parameters of the next generation of individuals are generated based on the approximate gradients. The experimental results were tested using CEC 2010 and CEC2013 LSGO benchmark test suite, and the experimental results verified the effectiveness of the algorithm on a number of different tasks.

ABSTRACTstudies in relation to working-class students at elite universities document on the one hand the role of ‘mundane reflexivity’ in dealing with class domination while on the other indicate a new form of domination and disadvantages working on these working-class ‘exceptions’ – they may achieve academically at university but experience various exclusions and self-exclusions in areas of social life. By drawing on a very small sample of ‘counter-evidence’ and ‘exceptions within exceptions’ – working-class students who achieve great social accomplishments at elite universities – this paper further explores the role of ‘mundane reflexivity’ in negotiating class domination and the possibilities of transcendence. We demonstrate the creative and transformative ways in which class domination is dealt with and document the prevalence of high-level reflexivity. Furthermore, we distinguish different forms and degrees of reflexivity, which then indicate the ‘contingency’ of reflexivity – the relation of the possibilities of reflexivity to the unequal distribution of social, cultural and economic capitals. We further argue that what appears to be a form of self-emancipation achieved by the ‘transcending group’ in our study also involves the discrete and insidious reproduction of social inequality.