A Modified Levenberg-Marquardt Method for the Bidirectional Relay Channel

This paper presents an optimization approach for a system consisting of multiple bidirectional links over a two-way amplify-and-forward relay. It is desired to improve the fairness of the system. All user pairs exchange information over one relay station with multiple antennas. Due to the joint transmission to all users, the users are subject to mutual interference. A mitigation of the interference can be achieved by max-min fair precoding optimization where the relay is subject to a sum power constraint. The resulting optimization problem is non-convex. This paper proposes a novel iterative and low complexity approach based on a modified Levenberg-Marquardt method to find near optimal solutions. The presented method finds solutions close to the standard convex-solver based relaxation approach.Comment: submitted to IEEE Transactions on Vehicular Technology We corrected small mistakes in the proof of Lemma 2 and Proposition

Опыт международного офиса НИУ ВШЭ в работе с иностранными учащимися

Анализируется опыт работы НИУ ВШЭ с иностранными учащимися, проблемы, возникающие при их обучении и адаптации, и способы их практического решения, выработанные НИУ ВШЭ

Понимание "субъективно-личностного" смысла как предпосылка обучения иноязычному общению

С позиций междисциплинарного подхода, а именно философских и педагогических изысканий, сделана попытка разрешения проблемы обучения иноязычному общению в связи с "субъективно-личностным" смыслом речевого сообщения

Применение технологии параллельных вычислений для оптимизации модели глобального освещения

Рассматривается математическая модель построения освещения в базисе сферических функций для трёхмерной сцены. Предлагается вариант распараллеленного предварительного расчёта коэффициентов разложения точек сцены по базису с применением технологии nVidia CUDA. Приводится сравнение производительности при счёте на центральных и графических процессорах

Developing guidelines for riverfront developments for Malaysia

Rivers and water are important resources for human life, the environment and national development. In Malaysia, the importance of rivers as the focal point of cities was established from the early times of civilisation and will remain so. Population growth, economic growth, urbanisation and increased technology have transformed many Malaysian river systems from water industries into non water industries. Due to these changes, the functions of riverfront areas have also changed and the current pattern of riverfront development in Malaysia now focuses more on mixed-use development and recreation. To date, numbers of riverfront development projects are being developed in Malaysia for recreation, residential and mixed-use. Unfortunately, in most cases, the developments identified are not successful, having cost effects more than their economic value. Example are increases in water pollution indexes and rates of juvenile problems. The focus of this study was to identify the attributes of riverfront development, in order to develop guidelines for riverfront development for Malaysia. The findings of this study were based on interviews conducted with Government officers, Property developers, and the Waterfront community from three case study areas (qualitative phase), and from questionnaires mailed and e-mailed to property development companies listed under Bursa Malaysia (quantitative phase). The findings identified 18 attributes to be used in assisting developers when undertaking riverfront projects in the future. The attributes identified were then recommended to be used as guidelines of best practices of riverfront development in Malaysia

Learner-centered Approach in Teaching Foreign Language: Psychological and Pedagogical Conditions

The paper dwells on the psychological and pedagogical conditions of implementing learner-centered approach in teaching foreign language to engineering students at the Tomsk Polytechnic University. The concept of learner-centered approach in teaching foreign language was in detail pedagogically, psychologically and methodologically studied, foreign language teaching regulatory documents in the technical university were analyzed, teaching methods and learning outcomes in accordance with the existing English language teaching methodology were presented, results of the engineering students’ questionnairing and key techniques to improve teaching foreign language based on the learner-centered approach were proposed