1.Introduction As global temperatures increase and weather patterns grow more er-ratic,the urgency of adopting climate-smart conservation strategies has intensified(Manyakaidze et al.,2024).Climate-smart conservation ...1.Introduction As global temperatures increase and weather patterns grow more er-ratic,the urgency of adopting climate-smart conservation strategies has intensified(Manyakaidze et al.,2024).Climate-smart conservation com-prises adaptive management practices aimed at bolstering the resilience of ecosystems and species amid climate variability(Birchall et al.,2021;Gabriel-Campos et al.,2021).展开更多
Climate change has major impacts on the livelihoods of forest-dependent communities.The unpredictable weather conditions in rural Nepal have been attributed to a changing climate.This study explored the climate change...Climate change has major impacts on the livelihoods of forest-dependent communities.The unpredictable weather conditions in rural Nepal have been attributed to a changing climate.This study explored the climate change adaptation and coping strategies that rural communities adopt for the conservation of natural resources and livelihoods in the mid-hills of Nepal.This paper explored major climatic hazards,assessed different coping and adaptation measures,and barrier faced to climate change adaptation based on perceptions by forest-dependent communities.We conducted focus group discussions,questionnaire surveys,and semistructured interviews with local communities and stakeholders.The results showed that rural communities had experienced significant impacts of climate change and variability.In response,they are practicing diverse coping and adaptation strategies,including the construction of bioengineering structures and planting different species that grow quickly and establish promptly.展开更多
Focus is laid on the adaptive practical output-tracking problem of a class of nonlinear systems with high-order lower-triangular structure and uncontrollable unstable linearization. Using the modified adaptive additio...Focus is laid on the adaptive practical output-tracking problem of a class of nonlinear systems with high-order lower-triangular structure and uncontrollable unstable linearization. Using the modified adaptive addition of a power integrator technique as a basic tool, a new smooth adaptive state feedback controller is designed. This controller can ensure all signals of the closed-loop systems are globally bounded and output tracking error is arbitrary small.展开更多
Purpose:In this article,we report on the findings of an investigation into the observations of two primary mathematics teachers during and following classroom teaching.Our focus is on teachers'noticing of student ...Purpose:In this article,we report on the findings of an investigation into the observations of two primary mathematics teachers during and following classroom teaching.Our focus is on teachers'noticing of student mathematics learning in the classroom.Design/Approach/Methods:Two teachers,each with 18 years of teaching experience,were recruited for this study.Qualitative analyses were conducted to explore what the teachers noticed about student learning,how they interpreted their noticing,and what decisions were made in accordance with their noticing in their teaching practices.Findings:The findings revealed that both participating teachers were attentive to their students'mathematical challenges and offered a range of interpretations regarding student learning.Additionally,the teachers adapted their practice to generate instruction that aligned with students'learningdifficulties.Originality/Value:This study provides empirical evidence for better understanding the noticing practices of experienced Chinese primary school mathematics teachers.展开更多
This paper investigates the problem of adaptive practical tracking control by output feedback for a class of nonlinear systems in which the nonlinearities are restricted to be upper bounded by a constant plus a polyno...This paper investigates the problem of adaptive practical tracking control by output feedback for a class of nonlinear systems in which the nonlinearities are restricted to be upper bounded by a constant plus a polynomial function of the output multiplied by unmeasured states. To solve the problem, an observer with a dynamic high-gain is first introduced, and then an adaptive output feedback tracking controller is successfully designed using the universal control methodology. It is shown that all the states of the closed-loop system are bounded, and the tracking error can be made arbitrarily small by an appropriate choice of the design parameters after some large enough time. A simulation example is also provided to illustrate the correctness of the theoretical results.展开更多
文摘1.Introduction As global temperatures increase and weather patterns grow more er-ratic,the urgency of adopting climate-smart conservation strategies has intensified(Manyakaidze et al.,2024).Climate-smart conservation com-prises adaptive management practices aimed at bolstering the resilience of ecosystems and species amid climate variability(Birchall et al.,2021;Gabriel-Campos et al.,2021).
文摘Climate change has major impacts on the livelihoods of forest-dependent communities.The unpredictable weather conditions in rural Nepal have been attributed to a changing climate.This study explored the climate change adaptation and coping strategies that rural communities adopt for the conservation of natural resources and livelihoods in the mid-hills of Nepal.This paper explored major climatic hazards,assessed different coping and adaptation measures,and barrier faced to climate change adaptation based on perceptions by forest-dependent communities.We conducted focus group discussions,questionnaire surveys,and semistructured interviews with local communities and stakeholders.The results showed that rural communities had experienced significant impacts of climate change and variability.In response,they are practicing diverse coping and adaptation strategies,including the construction of bioengineering structures and planting different species that grow quickly and establish promptly.
基金This work was supported by the National Natural Sdence Foundation of China (No. 60304003)the National Sdence Foundation of Shandong Province (No. Q2002G02)
文摘Focus is laid on the adaptive practical output-tracking problem of a class of nonlinear systems with high-order lower-triangular structure and uncontrollable unstable linearization. Using the modified adaptive addition of a power integrator technique as a basic tool, a new smooth adaptive state feedback controller is designed. This controller can ensure all signals of the closed-loop systems are globally bounded and output tracking error is arbitrary small.
基金funded by Guangdong Planning Office of Philosophy and Social Science[Project number:GD21YJY18].
文摘Purpose:In this article,we report on the findings of an investigation into the observations of two primary mathematics teachers during and following classroom teaching.Our focus is on teachers'noticing of student mathematics learning in the classroom.Design/Approach/Methods:Two teachers,each with 18 years of teaching experience,were recruited for this study.Qualitative analyses were conducted to explore what the teachers noticed about student learning,how they interpreted their noticing,and what decisions were made in accordance with their noticing in their teaching practices.Findings:The findings revealed that both participating teachers were attentive to their students'mathematical challenges and offered a range of interpretations regarding student learning.Additionally,the teachers adapted their practice to generate instruction that aligned with students'learningdifficulties.Originality/Value:This study provides empirical evidence for better understanding the noticing practices of experienced Chinese primary school mathematics teachers.
基金This research is supported by the National Natural Science Foundations of China under Grant Nos. 60674036 and 60974003, the Natural Science Foundation for Distinguished Young Scholar of Shandong Province of China under Grant No. JQ200919, the Program for New Century Excellent Talents in University of China under Grant No. NCET-07-0513, the Key Science and Technique Foundation of Ministry of Education of China under Grant No. 108079, and the Excellent Young and Middle-Aged Scientist Award Grant of Shandong Province of China under Grant No. 2007BS01010.
文摘This paper investigates the problem of adaptive practical tracking control by output feedback for a class of nonlinear systems in which the nonlinearities are restricted to be upper bounded by a constant plus a polynomial function of the output multiplied by unmeasured states. To solve the problem, an observer with a dynamic high-gain is first introduced, and then an adaptive output feedback tracking controller is successfully designed using the universal control methodology. It is shown that all the states of the closed-loop system are bounded, and the tracking error can be made arbitrarily small by an appropriate choice of the design parameters after some large enough time. A simulation example is also provided to illustrate the correctness of the theoretical results.
