Resource allocation for cache-enabled cloud-based small cell networks

To address the serious challenge of satisfying explosively increasing multimedia content requests from a massive number of users in mobile networks, deploying content caching in base stations to offload network traffic while satisfying content requests locally has been regarded as an effective approach to enhance the network performance. Moreover, content delivery via wireless transmissions in a cache-enabled mobile network needs to be optimized taking the proactive caching policy into consideration. Accordingly, in this paper, we investigate and propose an efficient resource allocation framework for cache-enabled cloud-based small cell networks (C-SCNs) to achieve the benefits of content caching by considering two phases, i.e., content placement and content delivery. In particular, for the content placement phase, we propose a low-complexity distributed popularity-based framework for allocating cache sizes of SBSs to popular contents, in order to offload network traffic and satisfy content requests locally. For the content delivery phase, we propose a low-complexity joint user association and subcarrier-power allocation scheme for min-rate guaranteed content delivery over orthogonal frequency division multiple access (OFDMA) based downlink transmissions. Trace-based simulations and numerical results demonstrate the effectiveness of the proposed schemes in the cache-enabled C-SCNs

A 2-step penalized regression method for family-based next-generation sequencing association studies

Large-scale genetic studies are often composed of related participants, and utilizing familial relationships can be cumbersome and computationally challenging. We present an approach to efficiently handle sequencing data from complex pedigrees that incorporates information from rare variants as well as common variants. Our method employs a 2-step procedure that sequentially regresses out correlation from familial relatedness and then uses the resulting phenotypic residuals in a penalized regression framework to test for associations with variants within genetic units. The operating characteristics of this approach are detailed using simulation data based on a large, multigenerational cohort

Study on Overseas Students Management and China’s Higher-Education Internationalization

The internationalization of higher-education canstrengthen the country’s influence in politics, economyand culture communications and exchanges. The overseasstudents education management is an integral part ofChina’s diplomatic work and bounden internationalistduty. Seizing the school strategic opportunities toexpand the foreign students to cultivate ideas, vigorouslydeveloping overseas students education based onuniversity characteristics of professional implementationof the characteristics of school, attracting foreign talent,strengthening more education exchanges, science andtechnology exchanges, cultural exchanges and economiccooperation will promote China's internationalizationof higher-education and get an invincible position in theworld competition of the educational resources which arethe focus in this paper.Key words: Overseas students; Educationmanagement; Internationalizatio

College of Humanities and Law, Shandong University of Science and Technology, Qingdao

Based on the cultural shocks in the education management for international students in China, cross-cultural management can improve the management efficiency and promote education of international student in China effectively.Key words: Cross-cultural management; Foreign students in China; Culture shock; Higher education; Internationalizatio

Association of blood pressure with development of metabolic syndrome components: a five-year retrospective cohort study in Beijing

Background: Raised blood pressure (BP) is associated with the incidence of metabolic syndrome (MetS). It is unknown if subjects with different BP levels may develop certain components of MetS over time. We investigated the incidence of MetS relative to different levels of BP over a 5-year period in a Chinese population in Tongren Hospital, Beijing. Methods: During the period of 2006–2011, we recruited 2,781 participants with no MetS, or self-reported type 2 diabetes, dyslipidemia, hypertension, or cardiovascular disease at baseline. Association rule was used to identify the transitions of MetS components over time. Results: The incidence of MetS at follow-up was 9.74% for men and 3.21% for women in the group with optimal BP; 10.29% and 7.22%, respectively, in the group with normal BP; 10.49% and 10.84%, respectively, in the group with high-normal BP; and 14.48% and 23.21%, respectively in the group with high BP. The most common transition was from healthy to healthy in the groups with optimal or normal BP (17.9–49.3%), whereas in the high-normal BP group, 16.9-22.1% of subjects with raised BP returned to healthy status or stayed unchanged, while 13.8-21.4% of people with high BP tended to develop raised fasting glucose levels. Conclusions: The incidence of MetS increased in parallel with the increase in BP. People with optimal and normal BP levels were less susceptible to developing MetS over time, whereas abnormal BP seemed to be a pre-existing phase of MetS. High-normal BP was a crucial status for MetS prevention

Numerical modeling of unsaturated flow in porous media using a thermodynamical approach

The Richards equation has been widely used to describe unsaturated flow in porous media, but its thermodynamical consistency has been scarcely investigated. In this paper, a thermodynamically consistent formulation of Richards equation is established on the basis of the free energy concept and the second law of thermodynamics. The capillary effect is described by an interfacial free energy and its corresponding chemical potential. The formulation takes the water saturation as the primary variable as well as chemical potential gradient as the primary driving force. An appealing feature is that the formulation follows an energy dissipation law, which implies the consistency to the second law of thermodynamics. Furthermore, a linearized and energy stable time discretized method is proposed for the model. Numerical results confirms the thermodynamical consistency of the formulation.Document Type: Original articleCited as: Kou, J., Wang, X. Numerical modeling of unsaturated flow in porous media using a thermodynamical approach. Capillarity, 2024, 11(3): 63-69. https://doi.org/10.46690/capi.2024.06.0