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531.
Jocelyn L. N. Wong 《Asia Pacific Education Review》2010,11(2):131-139
The concept of “professional learning community” (PLC) has been suggested as a tool to improve teachers’ professional competency
and students’ learning outcomes since the mid-1990s. In such a community, teachers can share their individual practices with
the aim of searching for “good practice” based on the outcome of collective inquiry. Such a learning process will result in
a reculturing of the school community by reshaping the existing values and cultures and resolving problems such as teacher
isolation and individualism. China already has a long tradition of teachers working and learning collaboratively, so investigating
collaborative efforts in this context may provide a view of how to contextualize professional development of teachers in schools.
This study attempts to access teachers’ lenses in order to explore their views on the effects of subject-based professional
learning activities. This also helps to explain how teachers work and openly share their practices aiming at improving their
professional competency and student learning outcomes within their communities. Also, factors influencing the sustainability
of a professional learning community will be discussed. 相似文献
532.
533.
Pak Kin Wong Xiang Hui Gao Ka In Wong Chi Man Vong 《Journal of The Franklin Institute》2018,355(4):1517-1538
Modern engines are controlled by electronic control units, which operate all the engine actuators based on the signals from various sensors in the engine. Traditionally, the control parameters of the actuators are obtained through huge amount of trial-and-error experiments. However, using traditional approach to calibrate these parameters becomes more challenging with the increasing incorporation of new technologies into advanced engines. In order to reduce the number of experiments required in the calibration process of modern engines, a novel point-by-point engine calibration approach based on machine learning methods is proposed in this study. It is an iterative procedure that, for a given operating point, sequential design of experiment (DoE) strategy is utilized to measure the responses of different engine sensors corresponding to different actuator signals, and a machine learning algorithm called initial-training-free online extreme learning machine is utilized to incrementally learn the relationship between the sensors and actuators based on the measurement acquired. In each iterative cycle, meta-heuristic optimization is performed on the machine-learning-based model to search for the best parameters, which are then used as the initial parameters for generating DoE plan of the next cycle. The iteration is repeated until the optimal parameters of that operating point are found. To verify the effectiveness of the proposed approach, experiments on both simulation engine in commercial software and real engine in test bench have been conducted. The results show that the engine calibration can be carried out with significant fewer experiments and time by using the proposed approach. 相似文献
534.
Qipeng Song Shen Wang Del P. Wong Jingyi Zhou Wei Sun Cui Zhang 《Sports biomechanics / International Society of Biomechanics in Sports》2018,17(3):402-413
The effects of long-term Tai Chi exercise on body stability of the elderly during stair ascent under high and low illumination were investigated. Forty-five healthy elderly women were divided into three groups, namely, Tai Chi exercise group, brisk walking group and no-exercise control group. All the participants ascended a staircase, during which force platforms and a motion capture system collected the data. Under the high illumination, Tai Chi exercise participants exhibited higher loading rate and anteroposterior centre of pressure (COPap) displacement as well as a lower braking impulse than no-exercise group. Under the low illumination, Tai Chi exercise participants demonstrated higher COPap and mediolateral centre of pressure (COPml) displacements as well as lower braking and lateral impulses compared with no-exercise participants. The centre of mass (COM)ml sway in Tai Chi and no exercise participants were higher, the loading rates in Tai Chi and walking participants were higher, and the lateral impulse in no exercise participants was higher under low illumination than under high illumination. Thus, low illumination increases the risk of falling. Tai Chi participants increased their foot clearance, head inclination angle and COPap displacement under low illumination to increase their stability during stair ascent. 相似文献
535.
Agnes S.K. Wong Matthew Moreno Samantha Burns Earl Woodruff 《Journal of Research in Reading》2023,46(2):143-162