The unloading creep behavior of soft soil under lateral unloading stress path and excess pore water pressure is the core problem of time-dependent analysis of surrounding rock deformation under excavation of soft soil. The soft soil in Shenzhen, China, was selected in this study. The triaxial unloading creep tests of soft soil under different initial excess pore water pressures (0, 20, 40, and 60 kPa) were conducted with the K0 consolidation and lateral unloading stress paths. The results show that the unloading creep of soft soil was divided into three stages: attenuation creep, constant velocity creep, and accelerated creep. The duration of creep failure is approximately 5 to 30 mins. The unloading creep behavior of soft soil is significantly affected by the deviatoric stress and time. The nonlinearity of unloading creep of soft soil is gradually enhanced with the increase of the deviatoric stress and time. The initial excess pore water pressure has an obvious weakening effect on the unloading creep of soft soil. Under the same deviatoric stress, the unloading creep of soft soil is more significant with the increase of initial excess pore water pressure. Under undrained conditions, the excess pore water pressure generally decreases during the lateral unloading process and drops sharply at the moment of unloading creep damage. The pore water pressure coefficients during the unloading process were 0.73–1.16, 0.26–1.08, and 0.35–0.96, respectively, corresponding to the initial excess pore water pressures of 20, 40, and 60 kPa.

Self-regulation is important in enhancing students’ academic performance, yet evidence for the systematic and valid instruments to measure self-regulated learning strategies of college students in an English as a foreign language context is far from robust. This study was situated to develop an evaluation tool to examine the status quo of self-regulated learning strategies employed by college English learners and the associations between the use of these strategies and their academic achievement. A large-scale survey was conducted at a university in Macau to provide evidence of the construct validity of responses to the questionnaire on self-regulated learning strategies. Conceptualized in social cognitive theory, the questionnaire comprised environmental, behavioral and personal self-regulated learning strategies with 48 items weaving into 10 dimensions. Strong evidence for reliability and validity was found. Findings also revealed that students who intrinsically valued and used more self-regulated learning strategies achieved higher academic performance. Students in advanced-level English course reported significantly more frequent use of self-regulated learning strategies than students in medium-level and mixed-level English courses. Our results draw attention to the pedagogical orientation for teachers of English as a foreign/second language in helping students become adaptive learners with self-regulative process.

Presented in this paper is a study on the lateral unloading creep tests under different excess pore water pressures. The marine sedimentary soft soil in Shenzhen, China, was selected in this study. The results show that the excess pore water pressure plays a significant role in enhancing the unloading creep of soft soil. Higher excess pore water pressure brings more obvious creep deformation of soft soil and lower ultimate failure load. Meanwhile, the viscoelastic and the viscoplastic modulus of soft soil were found to exponentially decline with creep time. A modified merchant model and a combined model of the modified merchant model and plastic elements are used to simulate the viscoelastic and the viscoplastic deformation, respectively. Therefore, a lateral unloading creep model of soft soil is developed based on the modified merchant model. The accuracy and applicability of this model were verified through identifying the parameters in the model. Research results are of particular significance to the numerical simulation of underground space excavation in soft soil areas which considers the effects of excess pore water pressure.

Really Simple Syndication (RSS) has the characteristics of syndication and aggregation, so each RSS user can subscribe what he needs, and the difference in behavior represents RSS users' individual information needs. In this paper, we concern about RSS user's behavior. According to establish and amend RSS user's individual interest model automatically from the user's implicit feedback, we could derive of user's interest, so as to provide RSS user with targeted information and realize RSS user's personalized information services.