Strategic initiative:Entering Oman for a new strategy In 2004,the International Department of CNPC’s BGP took a crucial step in the Middle East market by successfully securing a seismic exploration project for the na...Strategic initiative:Entering Oman for a new strategy In 2004,the International Department of CNPC’s BGP took a crucial step in the Middle East market by successfully securing a seismic exploration project for the national oil company of Oman,Petroleum Development Oman(PDO).展开更多
As power systems expand,solving the unit commitment problem(UCP)becomes increasingly challenging due to the curse of dimensionality,and traditional methods often struggle to balance computational efficiency and soluti...As power systems expand,solving the unit commitment problem(UCP)becomes increasingly challenging due to the curse of dimensionality,and traditional methods often struggle to balance computational efficiency and solution optimality.To tackle this issue,we propose a problem-structure-informed quantum approximate optimization algorithm(QAOA)framework that fully exploits the quantum advantage under extremely limited quantum resources.Specifically,we leverage the inherent topological structure of power systems to decompose large-scale UCP instances into smaller subproblems,which are solvable in parallel by limited number of qubits.This decomposition not only circumvents the current hardware limitations of quantum computing but also achieves higher performance as the graph structure of the power system becomes more sparse.Consequently,our approach can be extended to future power systems that are larger and more complex.展开更多
集成电路测试机(Automatic Test Equipment,ATE)是用于验证芯片功能与性能的核心设备,传统测试方法存在效率低、精度不足等问题,为此提出一种基于ST3020 ATE测试机的自动测试方案,该设备具备自动化、高效率、高精度、宽量程、高灵活性...集成电路测试机(Automatic Test Equipment,ATE)是用于验证芯片功能与性能的核心设备,传统测试方法存在效率低、精度不足等问题,为此提出一种基于ST3020 ATE测试机的自动测试方案,该设备具备自动化、高效率、高精度、宽量程、高灵活性与良好扩展性等特点。以芯片UC2625为测试对象,通过软件层面编写自动测试代码,硬件层面设计接口板PCB,结合循环测试、数组存储与比对等技术,系统研究了该芯片的逻辑功能与关键参数指标,最终实现了完整的ATE自动测试方案。测试结果与芯片手册规格相符,满足实际测试要求。方案在自动测试方法上进行了有益探索,为我国ATE测试技术的自主发展提供了重要参考。展开更多
Soft clay treatment with all industrial by-product(IBP)binder has great economic and environmental benefits,yet its geomechanics and mechanisms still need to be well probed.With the activation by calcium carbide resid...Soft clay treatment with all industrial by-product(IBP)binder has great economic and environmental benefits,yet its geomechanics and mechanisms still need to be well probed.With the activation by calcium carbide residue(CCR)and phosphogypsum(PG),the strength,structure,and mechanisms of soft clay treated by aluminosilicate-rich IBP(AS-IBP,such as ground granulated blast furnace slag(GGBS),fly ash(FA),coal gangue(CG),Bayer red mud(BR),and sintered red mud(SR))are comparatively investigated.The strength characteristics of solidified clay exhibit significant differences as AS-IBP changes.When GGBS is adopted,the strength is sensitive to the change in PG content,while the impact of CCR is insignificant.After 90 d,the strength of the optimal sample(G23)reaches 1.40 MPa,35.9%higher than cement solidified clay(CSC),while that achieved by other AS-IBPs is less than 0.3 MPa.In the compression test,the structure's evolutionary trend of G23 has a sudden change as the strength increases from 1.81 MPa to 2.29 MPa,suggesting the transformation in material properties.Besides,the structure of G23 is stronger than CSC,which contributes more to the compressive performance.The total amount of main products(C-S-H and ettringite)of all-IBP solidified clay determines the strength,and ettringite is only significant when calcium-rich AS-IBP is adopted.The total amount of minor products(C-A-H and C-A-S-H)is similar for different samples,equivalent to 28.9%-46.3%of the main products.The relationship between the strength and the product amount can be presented using an exponential function.展开更多
The biodegradable polybutylene succinate(PBS)material offers a sustainable solution for a circular economy to address the global issue of marine plastic waste.Its cross-linkage with non-biodegradable xanthan gum(XG)bi...The biodegradable polybutylene succinate(PBS)material offers a sustainable solution for a circular economy to address the global issue of marine plastic waste.Its cross-linkage with non-biodegradable xanthan gum(XG)biopolymer to ameliorate residual granitic soil(RGS)in arid and semiarid regions can significantly mitigate soil erosion.This study investigates the enhancement of RGS by cross-linking the PBS and XG biopolymers.Employing a multitude of geotechnical tests(liquid limit,linear shrinkage,specific gravity,compaction,and UCS tests)at 3 d,28 d,and 90 d of steam-curing at a controlled temperature of 16℃,the outcomes were validated through scanning electron microscopy(SEM),thermogravimetric analysis(TGA),Fourier transform infrared spectroscopy(FTIR),and Brunauer-Emmett-Teller(BET)analyses.In addition,a comprehensive experimental database of 150 tests and nine parameters from the current study was utilized to model the UCS90-d(i.e.unconfined compressive strength after 90 d of curing)of the PBS-XG-treated RGS mixtures by deploying the random forest(RF)and eXtreme Gradient Boost(XGBoost)methods.The results found that the two biopolymers significantly improve the mechanical properties of RGS,with optimal UCS achieved at specific dosages(0.4PBS,1.5XG,and 0.2PBS+1.5XG dosage levels)and curing times.The UCS of PBS-XG-treated RGS showed up to a 57%increase after 90 d of curing.Furthermore,SEM and FTIR analyses revealed the formation of stronger microstructures and chemical bonds,respectively,whereas BET analysis indicated that pore volume and diameter are critical in affecting UCS.The proposed RF model outperformed XGBoost in predictive accuracy and generalization,demonstrating robustness and versatility.Moreover,SHAP values highlighted the significant impact of input parameters on UCS90-d,with curing time and specific material properties being key determinants.The study concludes with the proposal of a novel PyCharm intuitive graphical user interface as a"UCS Prediction App"for engineers and practitioners to forecast the UCS90-d of granitic residual soil.展开更多
Electric power system is one of the most important and complex engineering in modern society, supplying main and general power for social production and social life. Meanwhile, since it is a productive system with bo...Electric power system is one of the most important and complex engineering in modern society, supplying main and general power for social production and social life. Meanwhile, since it is a productive system with both high input and output, it has an obvious economic significance to improve its operating efficiency. For an example, an unit is 10 GW scale, if its standard coal consumption can be decreased with 1 g/kW·h, it can save about 5 000 tons standard coal per year. It will be discussed mainly that how to establish optimization model and its numerical algorithm for operating management of the electric power system. The idea on establishing optimization model is how to dispatch work state of units or power plants, so that total cost of fuel consumption for generation is reduced to the minimum. Here the dispatch is to decide which unit or plant to operate, which unit or plant to stop running, how much power should be generated for those operating units or plants at each given time interval.展开更多
Unit commitment(UC), as a typical optimization problem in electric power system, faces new challenges as energy saving and emission reduction get more and more important in the way to a more environmentally friendly s...Unit commitment(UC), as a typical optimization problem in electric power system, faces new challenges as energy saving and emission reduction get more and more important in the way to a more environmentally friendly society. To meet these challenges, we propose a UC model considering energy saving and emission reduction. By using real-number coding method, swap-window and hill-climbing operators, we present an improved real-coded genetic algorithm(IRGA) for UC. Compared with other algorithms approach to the proposed UC problem, the IRGA solution shows an improvement in effectiveness and computational time.展开更多
The purpose of this research is to investigate the interrelationships among the three behavioural constructs of job involvement, job satisfaction and organizational commitment. Accordingly, a structural model is devel...The purpose of this research is to investigate the interrelationships among the three behavioural constructs of job involvement, job satisfaction and organizational commitment. Accordingly, a structural model is developed to delineate the interactions among these constructs and explore the mediating effect of job satisfaction on the relationship between job involvement and organizational commitment. A questionnaire-based survey was designed to test the aforementioned model based on a dataset of 315 employees working in twelve out of twenty six banks operating in the capital city of Jordan, Amman. The model and posited hypotheses were tested using structural equation modelling analysis. The results indicated that job involvement positively and significantly affects job satisfaction and organizational commitment. Additionally, job satisfaction proved to be positively related to organizational commitment. Furthermore, job satisfaction positively and significantly partially mediated the relationship between job involvement and organizational commitment.展开更多
Family business predecessor announced to staff that with his son, he is going to commence a succession process in the family firm. Two of the key employees rose and announced their intention to leave the company after...Family business predecessor announced to staff that with his son, he is going to commence a succession process in the family firm. Two of the key employees rose and announced their intention to leave the company after the predecessor passed leadership of the firm to successor. In a firm with a total number of nine employees, such a situation can prove catastrophic. Why did these employees react that way？ What is behind their motivation？ Using these two employees as examples, this study discusses the elements which influence the development and continuance of employees＇ organisational commitment. Inspired by the example, this study gives answers by means of qualitative research methods to the following research questions： Could acceptance predict the development and continuation of organisational commitment during a process of organisational change and how do the concepts of psychological acceptance adaptation and organisational commitment link together in employee cognitive processing during organisational change？ The empirical setting of this study includes seven small family fLrms and the study has carded out an overview of family business succession （FBS） from the viewpoint of non-family employees in Finnish and Irish family firms. Results of the study indicate how employees＇ commitment forms and changes during a certain change process. A key element for development and the continuance of commitment is acceptance. As an outcome of this paper, a new model will be developed where acceptance, adaptation, and commitment （AAC-model） are combined, in essence, three dimensions （functional, legal-economic, and psychological） of changes in FBS.展开更多
This paper discusses the notion of commitment--a construct used in the psychology of work--and engagement, as hypothetically opposed to the concept of burnout used in the paradigm of positive psychology. The aim of th...This paper discusses the notion of commitment--a construct used in the psychology of work--and engagement, as hypothetically opposed to the concept of burnout used in the paradigm of positive psychology. The aim of this study is to analyze engagement in a group of 132 high school teachers from various schools in the private sector and identify its relationship with the commitment variable. The results of the work of this group in three dimensions are presented in this study： vigor, dedication, and absorption; the correlation data are also presented with organizational commitment in three dimensions： affective, normative and temporal （or continuity）. With these results the aim is to find predictive evidence among teachers who score significantly in the three dimensions of engagement and the three dimensions of commitment.展开更多
Many studies have considered the solution of Unit Commitment problems for the management of energy networks. In this field, earlier work addressed the problem in determinist cases and in cases dealing with demand unce...Many studies have considered the solution of Unit Commitment problems for the management of energy networks. In this field, earlier work addressed the problem in determinist cases and in cases dealing with demand uncertainties. In this paper, the authors develop a method to deal with uncertainties related to the cost function. Indeed, such uncertainties often occur in energy networks （waste incinerator with a priori unknown waste amounts, cogeneration plant with uncertainty of the sold electricity price...）. The corresponding optimization problems are large scale stochastic non-linear mixed integer problems. The developed solution method is a recourse based programming one. The main idea is to consider that amounts of energy to produce can be slightly adapted in real time, whereas the on/off statuses of units have to be decided very early in the management procedure. Results show that the proposed approach remains compatible with existing Unit Commitment programming methods and presents an obvious interest with reasonable computing loads.展开更多
The enhancement of the intensity of red upconversion(UC)emission has significant implications for biological applications.In KZnF_(3):Yb^(3+),Er^(3+)which inherently produces high-purity red emission,the introduction ...The enhancement of the intensity of red upconversion(UC)emission has significant implications for biological applications.In KZnF_(3):Yb^(3+),Er^(3+)which inherently produces high-purity red emission,the introduction of Fe^(3+)markedly improves the UC intensity by a factor of 13.The mechanism behind the enhanced UC red luminescence is deduced to originate from the Yb^(3+)-Fe^(3+)dimer,as determined by first principle calculation and analysis of UC luminescence properties.The thermometry performance,based on splitting peaks of red emission,demonstrated enhanced temperature sensitivity at lower ranges.Exploring the photothermal properties,it was observed that temperature exhibited a linear correlation with pump power under a 980 nm laser,achieving levels up to 48℃.This temperature range is ideal for applications in mild photothermal therapy(MPTT).This work elucidates the material’s potential in advanced biological applications,merging optical thermometry and photothermics,indicating its multifunctional utility.展开更多
Objective:To study the relationship,the mediating effect of organizational commitment on nurses’ethical climate and ethical behavior.Methods:Structural Equation Modeling(SEM)was employed to perform path analysis in t...Objective:To study the relationship,the mediating effect of organizational commitment on nurses’ethical climate and ethical behavior.Methods:Structural Equation Modeling(SEM)was employed to perform path analysis in this exploratory study.The participants consisted of 280 Iranian nurses who were studied through proportional random sampling.The research tool was consisted of(1)the Ethical Climate Questionnaire by Cullen and Victor,which examines the ethical standards of selfishness,philanthropy,and ethical principles,as well as the reference sources of ethical arguments,including individual,regional,and global ones;(2)Allen and Mayer’s questionnaire,which measures organizational commitment in 3 areas:emotional commitment,continuous commitment,and normative commitment;and(3)Peterson’s Ethical Behavior Questionnaire,which combines nine items to form interconnected ethical behaviors and is based on a 5-point Likert scale.The data were analyzed using AMOS and SPSS v.23 software.Results:The correlation coefficient between the two variables,ethical climate and ethical behavior,showed a significant relationship(r=0.10,p=0.085).The organizational commitment showed a significant relationship between some dimensions and the total ethical climate.The ethical climate affects the organizational commitment(beta=3.261)and behavior(beta=0.121).Organizational commitment does not show any significant relationship with ethical behavior.The ethical climate affects the organizational commitment and the ethical behavior.Conclusions:Nursing managers and nursing staff should consider the ethical climate that affects the organizational commitment and nursing ethical behavior.展开更多
Objectives:For the younger generation(i.e.,Millennials and Generation Z),running is not only about physical health,but also about building psychological resources and multidimensional well-being,reflecting their uniqu...Objectives:For the younger generation(i.e.,Millennials and Generation Z),running is not only about physical health,but also about building psychological resources and multidimensional well-being,reflecting their unique culture and lifestyle.This study aims to investigate the structural relationships among exercise commitment,psychological capital(PsyCap),and flourishing in younger adults in South Korea by integrating Social Cognitive Theory(SCT)and Broaden-and-Build Theory(BBT)using a second-order partial least squares structural equation modeling(PLS-SEM).Methods:A total of 166 participants were recruited through convenience sampling via online survey.They were young South Korean adults(born 1983–2005)who run at least once a week and were recruited through two universities and running communities.The survey included validated scales measuring exercise commitment(cognitive and behavioral),PsyCap(hope,efficacy,resilience,and optimism),and flourishing(emotional,psychological,and social well-being).Data were analyzed using PLS-SEM with 5000 bootstrap resamples in SmartPLS 4.1.1.2.Subsequently,mea-surement and structural models were assessed through confirmatory composite analysis(CCA),and common method variance(CMV)was checked using Harman’s single-factor test.Results:Exercise commitment significantly predicted PsyCap(β=0.171,p<0.05)and PsyCap significantly predicted flourishing(β=0.444,p<0.001).Mediation analysis confirmed that PsyCap fully mediated the relationship between exercise commitment and flourishing(β=0.071,p<0.05).Although the indirect effect may appear numerically small,it translated to a 7.1%increase in flourishing scores—a practically meaningful effect in social science contexts where even modest changes yield real-world impact.The findings empirically support the integration of two frameworks,highlighting both motivational(SCT)and affective(BBT)pathways through which exercise fosters multidimensional well-being.Conclusions:Theoretically,this study advances understanding of how cognitive and behavioral commitment contribute to the development of psychological resources that collectively drive flourishing.Practically,the results suggest that running programs targeting younger adults should focus on fostering PsyCap—via goal setting,social support,and digital engagement—to maximize well-being outcomes.Moreover,the findings have the potential to inform mental health promotion strategies beyond the Korean context.This study has several limitations,including a skewed sample resulting from convenience sampling,the lack of comparative analysis across different age cohorts,and the use of second-order constructs that may obscure dimension-specific effects.Future research should address these limitations by employing stratified sampling,adopting comparative study designs,and conducting model comparisons between first-and second-order constructs to elucidate both overarching and dimension-specific pathways.展开更多
This study examined the relationships among workplace spirituality,mindfulness,mental well-being,and organizational commitment in professional female dancers.A total of 424 dancers from the United States participated ...This study examined the relationships among workplace spirituality,mindfulness,mental well-being,and organizational commitment in professional female dancers.A total of 424 dancers from the United States participated in the survey.Structural equation modeling indicated that workplace spirituality was positively associated with both mental well-being and organizational commitment,whereas mindfulness was significantly related only to organizational commitment.Mental well-being was a significant predictor of organizational commitment and mediated the relationship between workplace spirituality and organizational commitment,but not between mindfulness and commitment.These results suggest that workplace spirituality functions as a psychological resource that enhances emotional health and strengthens organizational engagement.Thesefindings are consistent with self-determination theory,highlighting the role of value congruence and intrinsic purpose in sustaining motivation in high-performance contexts.Moreover,the studyfindings underscore the importance of fostering spiritually supportive work environments to promote psychological well-being and long-term organizational commitment.展开更多
In this paper,a strength-constrained unit commitment(UC)model incorporating system strength constraints based on the weighted short-circuit ratio(WSCR)is proposed.This model facilitates the comprehensive assessment of...In this paper,a strength-constrained unit commitment(UC)model incorporating system strength constraints based on the weighted short-circuit ratio(WSCR)is proposed.This model facilitates the comprehensive assessment of area-wide system strength in power systems with high inverter-based resource(IBR)penetration,thereby contributing to the mitigation of weak grid issues.Unlike traditional models,this approach considers the interactions among multiple IBRs.The UC problem is initially formulated as a mixed-integer nonlinear programming(MINLP)model,reflecting WSCR and bus impedance matrix modification constraints.To enhance computational tractability,the model is transformed into a mixed-integer linear programming(MILP)form.The effectiveness of the proposed approach is validated through simulations on the IEEE 5-bus,IEEE 39-bus,and a modified Korean power system,demonstrating the ability of the proposed UC model enhancing system strength compared to the conventional methodologies.展开更多
Objectives:College students face increasing mental health challenges.Although Acceptance and CommitmentTherapy(ACT)is effective,the efficacy of Internet-based ACT(iACT)needs further exploration.Methods:This study exam...Objectives:College students face increasing mental health challenges.Although Acceptance and CommitmentTherapy(ACT)is effective,the efficacy of Internet-based ACT(iACT)needs further exploration.Methods:This study examines the efficacy of iACT on college students’mental health through a randomized controlled trial.We recruited 90 college students(19.16±1.02 years old)and randomly divided them into the iACT group,face-to-face ACT group,and control group.The effects of the interventions were evaluated using the comprehensive assessment of ACT processes(CompACT)and the Depression Anxiety Stress Scales(DASS-21).Results:Two-factor repeated measures ANOVA revealed a significant time main effect of iACT.Face-to-face ACT and iACT effectively improved college students’psychological flexibility[F(2,83)=18.78,p<0.001,η^(2)=0.18]and alleviated their negative emotions[F(2,82)=41.17,p<0.001,η^(2)=0.36].Face-to-face ACT exhibited sustained effects on improving participants’psychological flexibility and alleviating their negative emotions(p<0.001),while iACT showed no sustained effect on improving participants’psychological flexibility(p>0.05).Conclusion:While iACT and face-to-face ACT are effective shortterm interventions,face-to-face ACT demonstrates superior sustainability.Integrating guided sessions into iACT may enhance long-term outcomes.These findings advocate for blended interventions to address college students’mental health needs,particularly in resource-limited settings.展开更多
文摘Strategic initiative:Entering Oman for a new strategy In 2004,the International Department of CNPC’s BGP took a crucial step in the Middle East market by successfully securing a seismic exploration project for the national oil company of Oman,Petroleum Development Oman(PDO).
文摘As power systems expand,solving the unit commitment problem(UCP)becomes increasingly challenging due to the curse of dimensionality,and traditional methods often struggle to balance computational efficiency and solution optimality.To tackle this issue,we propose a problem-structure-informed quantum approximate optimization algorithm(QAOA)framework that fully exploits the quantum advantage under extremely limited quantum resources.Specifically,we leverage the inherent topological structure of power systems to decompose large-scale UCP instances into smaller subproblems,which are solvable in parallel by limited number of qubits.This decomposition not only circumvents the current hardware limitations of quantum computing but also achieves higher performance as the graph structure of the power system becomes more sparse.Consequently,our approach can be extended to future power systems that are larger and more complex.
文摘集成电路测试机(Automatic Test Equipment,ATE)是用于验证芯片功能与性能的核心设备,传统测试方法存在效率低、精度不足等问题,为此提出一种基于ST3020 ATE测试机的自动测试方案,该设备具备自动化、高效率、高精度、宽量程、高灵活性与良好扩展性等特点。以芯片UC2625为测试对象,通过软件层面编写自动测试代码,硬件层面设计接口板PCB,结合循环测试、数组存储与比对等技术,系统研究了该芯片的逻辑功能与关键参数指标,最终实现了完整的ATE自动测试方案。测试结果与芯片手册规格相符,满足实际测试要求。方案在自动测试方法上进行了有益探索,为我国ATE测试技术的自主发展提供了重要参考。
基金supported by the National Natural Science Foundation of China(Grant No.U24A20183)Natural Science Fund for Distinguished Young Scholars of Hubei Province,China(Grant No.2024AFA051)Youth Science Fund(A-class)of Hunan Natural Science Foundation of China(Grant No.2025JJ20049).
文摘Soft clay treatment with all industrial by-product(IBP)binder has great economic and environmental benefits,yet its geomechanics and mechanisms still need to be well probed.With the activation by calcium carbide residue(CCR)and phosphogypsum(PG),the strength,structure,and mechanisms of soft clay treated by aluminosilicate-rich IBP(AS-IBP,such as ground granulated blast furnace slag(GGBS),fly ash(FA),coal gangue(CG),Bayer red mud(BR),and sintered red mud(SR))are comparatively investigated.The strength characteristics of solidified clay exhibit significant differences as AS-IBP changes.When GGBS is adopted,the strength is sensitive to the change in PG content,while the impact of CCR is insignificant.After 90 d,the strength of the optimal sample(G23)reaches 1.40 MPa,35.9%higher than cement solidified clay(CSC),while that achieved by other AS-IBPs is less than 0.3 MPa.In the compression test,the structure's evolutionary trend of G23 has a sudden change as the strength increases from 1.81 MPa to 2.29 MPa,suggesting the transformation in material properties.Besides,the structure of G23 is stronger than CSC,which contributes more to the compressive performance.The total amount of main products(C-S-H and ettringite)of all-IBP solidified clay determines the strength,and ettringite is only significant when calcium-rich AS-IBP is adopted.The total amount of minor products(C-A-H and C-A-S-H)is similar for different samples,equivalent to 28.9%-46.3%of the main products.The relationship between the strength and the product amount can be presented using an exponential function.
基金supported by the National Natural Science Foundation of China(Grant Nos.52379104 and 52090084).
文摘The biodegradable polybutylene succinate(PBS)material offers a sustainable solution for a circular economy to address the global issue of marine plastic waste.Its cross-linkage with non-biodegradable xanthan gum(XG)biopolymer to ameliorate residual granitic soil(RGS)in arid and semiarid regions can significantly mitigate soil erosion.This study investigates the enhancement of RGS by cross-linking the PBS and XG biopolymers.Employing a multitude of geotechnical tests(liquid limit,linear shrinkage,specific gravity,compaction,and UCS tests)at 3 d,28 d,and 90 d of steam-curing at a controlled temperature of 16℃,the outcomes were validated through scanning electron microscopy(SEM),thermogravimetric analysis(TGA),Fourier transform infrared spectroscopy(FTIR),and Brunauer-Emmett-Teller(BET)analyses.In addition,a comprehensive experimental database of 150 tests and nine parameters from the current study was utilized to model the UCS90-d(i.e.unconfined compressive strength after 90 d of curing)of the PBS-XG-treated RGS mixtures by deploying the random forest(RF)and eXtreme Gradient Boost(XGBoost)methods.The results found that the two biopolymers significantly improve the mechanical properties of RGS,with optimal UCS achieved at specific dosages(0.4PBS,1.5XG,and 0.2PBS+1.5XG dosage levels)and curing times.The UCS of PBS-XG-treated RGS showed up to a 57%increase after 90 d of curing.Furthermore,SEM and FTIR analyses revealed the formation of stronger microstructures and chemical bonds,respectively,whereas BET analysis indicated that pore volume and diameter are critical in affecting UCS.The proposed RF model outperformed XGBoost in predictive accuracy and generalization,demonstrating robustness and versatility.Moreover,SHAP values highlighted the significant impact of input parameters on UCS90-d,with curing time and specific material properties being key determinants.The study concludes with the proposal of a novel PyCharm intuitive graphical user interface as a"UCS Prediction App"for engineers and practitioners to forecast the UCS90-d of granitic residual soil.
文摘Electric power system is one of the most important and complex engineering in modern society, supplying main and general power for social production and social life. Meanwhile, since it is a productive system with both high input and output, it has an obvious economic significance to improve its operating efficiency. For an example, an unit is 10 GW scale, if its standard coal consumption can be decreased with 1 g/kW·h, it can save about 5 000 tons standard coal per year. It will be discussed mainly that how to establish optimization model and its numerical algorithm for operating management of the electric power system. The idea on establishing optimization model is how to dispatch work state of units or power plants, so that total cost of fuel consumption for generation is reduced to the minimum. Here the dispatch is to decide which unit or plant to operate, which unit or plant to stop running, how much power should be generated for those operating units or plants at each given time interval.
基金the National Natural Science Foundation of China(Nos.61004088 and 61374160)
文摘Unit commitment(UC), as a typical optimization problem in electric power system, faces new challenges as energy saving and emission reduction get more and more important in the way to a more environmentally friendly society. To meet these challenges, we propose a UC model considering energy saving and emission reduction. By using real-number coding method, swap-window and hill-climbing operators, we present an improved real-coded genetic algorithm(IRGA) for UC. Compared with other algorithms approach to the proposed UC problem, the IRGA solution shows an improvement in effectiveness and computational time.
文摘The purpose of this research is to investigate the interrelationships among the three behavioural constructs of job involvement, job satisfaction and organizational commitment. Accordingly, a structural model is developed to delineate the interactions among these constructs and explore the mediating effect of job satisfaction on the relationship between job involvement and organizational commitment. A questionnaire-based survey was designed to test the aforementioned model based on a dataset of 315 employees working in twelve out of twenty six banks operating in the capital city of Jordan, Amman. The model and posited hypotheses were tested using structural equation modelling analysis. The results indicated that job involvement positively and significantly affects job satisfaction and organizational commitment. Additionally, job satisfaction proved to be positively related to organizational commitment. Furthermore, job satisfaction positively and significantly partially mediated the relationship between job involvement and organizational commitment.
文摘Family business predecessor announced to staff that with his son, he is going to commence a succession process in the family firm. Two of the key employees rose and announced their intention to leave the company after the predecessor passed leadership of the firm to successor. In a firm with a total number of nine employees, such a situation can prove catastrophic. Why did these employees react that way？ What is behind their motivation？ Using these two employees as examples, this study discusses the elements which influence the development and continuance of employees＇ organisational commitment. Inspired by the example, this study gives answers by means of qualitative research methods to the following research questions： Could acceptance predict the development and continuation of organisational commitment during a process of organisational change and how do the concepts of psychological acceptance adaptation and organisational commitment link together in employee cognitive processing during organisational change？ The empirical setting of this study includes seven small family fLrms and the study has carded out an overview of family business succession （FBS） from the viewpoint of non-family employees in Finnish and Irish family firms. Results of the study indicate how employees＇ commitment forms and changes during a certain change process. A key element for development and the continuance of commitment is acceptance. As an outcome of this paper, a new model will be developed where acceptance, adaptation, and commitment （AAC-model） are combined, in essence, three dimensions （functional, legal-economic, and psychological） of changes in FBS.
文摘This paper discusses the notion of commitment--a construct used in the psychology of work--and engagement, as hypothetically opposed to the concept of burnout used in the paradigm of positive psychology. The aim of this study is to analyze engagement in a group of 132 high school teachers from various schools in the private sector and identify its relationship with the commitment variable. The results of the work of this group in three dimensions are presented in this study： vigor, dedication, and absorption; the correlation data are also presented with organizational commitment in three dimensions： affective, normative and temporal （or continuity）. With these results the aim is to find predictive evidence among teachers who score significantly in the three dimensions of engagement and the three dimensions of commitment.
文摘Many studies have considered the solution of Unit Commitment problems for the management of energy networks. In this field, earlier work addressed the problem in determinist cases and in cases dealing with demand uncertainties. In this paper, the authors develop a method to deal with uncertainties related to the cost function. Indeed, such uncertainties often occur in energy networks （waste incinerator with a priori unknown waste amounts, cogeneration plant with uncertainty of the sold electricity price...）. The corresponding optimization problems are large scale stochastic non-linear mixed integer problems. The developed solution method is a recourse based programming one. The main idea is to consider that amounts of energy to produce can be slightly adapted in real time, whereas the on/off statuses of units have to be decided very early in the management procedure. Results show that the proposed approach remains compatible with existing Unit Commitment programming methods and presents an obvious interest with reasonable computing loads.
基金supported by the Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD),"Qinglan Project"Young and Middle-aged Academic Leaders Program of Jiangsu Province,and the National Natural Science Foundation of China(General Program).
文摘The enhancement of the intensity of red upconversion(UC)emission has significant implications for biological applications.In KZnF_(3):Yb^(3+),Er^(3+)which inherently produces high-purity red emission,the introduction of Fe^(3+)markedly improves the UC intensity by a factor of 13.The mechanism behind the enhanced UC red luminescence is deduced to originate from the Yb^(3+)-Fe^(3+)dimer,as determined by first principle calculation and analysis of UC luminescence properties.The thermometry performance,based on splitting peaks of red emission,demonstrated enhanced temperature sensitivity at lower ranges.Exploring the photothermal properties,it was observed that temperature exhibited a linear correlation with pump power under a 980 nm laser,achieving levels up to 48℃.This temperature range is ideal for applications in mild photothermal therapy(MPTT).This work elucidates the material’s potential in advanced biological applications,merging optical thermometry and photothermics,indicating its multifunctional utility.
基金supported by The Mediating Effect of Organizational Commitment on Nurses’Ethical Climate and Ethical Behavior(No.IR.UMSHA.REC.1396.601).
文摘Objective:To study the relationship,the mediating effect of organizational commitment on nurses’ethical climate and ethical behavior.Methods:Structural Equation Modeling(SEM)was employed to perform path analysis in this exploratory study.The participants consisted of 280 Iranian nurses who were studied through proportional random sampling.The research tool was consisted of(1)the Ethical Climate Questionnaire by Cullen and Victor,which examines the ethical standards of selfishness,philanthropy,and ethical principles,as well as the reference sources of ethical arguments,including individual,regional,and global ones;(2)Allen and Mayer’s questionnaire,which measures organizational commitment in 3 areas:emotional commitment,continuous commitment,and normative commitment;and(3)Peterson’s Ethical Behavior Questionnaire,which combines nine items to form interconnected ethical behaviors and is based on a 5-point Likert scale.The data were analyzed using AMOS and SPSS v.23 software.Results:The correlation coefficient between the two variables,ethical climate and ethical behavior,showed a significant relationship(r=0.10,p=0.085).The organizational commitment showed a significant relationship between some dimensions and the total ethical climate.The ethical climate affects the organizational commitment(beta=3.261)and behavior(beta=0.121).Organizational commitment does not show any significant relationship with ethical behavior.The ethical climate affects the organizational commitment and the ethical behavior.Conclusions:Nursing managers and nursing staff should consider the ethical climate that affects the organizational commitment and nursing ethical behavior.
文摘Objectives:For the younger generation(i.e.,Millennials and Generation Z),running is not only about physical health,but also about building psychological resources and multidimensional well-being,reflecting their unique culture and lifestyle.This study aims to investigate the structural relationships among exercise commitment,psychological capital(PsyCap),and flourishing in younger adults in South Korea by integrating Social Cognitive Theory(SCT)and Broaden-and-Build Theory(BBT)using a second-order partial least squares structural equation modeling(PLS-SEM).Methods:A total of 166 participants were recruited through convenience sampling via online survey.They were young South Korean adults(born 1983–2005)who run at least once a week and were recruited through two universities and running communities.The survey included validated scales measuring exercise commitment(cognitive and behavioral),PsyCap(hope,efficacy,resilience,and optimism),and flourishing(emotional,psychological,and social well-being).Data were analyzed using PLS-SEM with 5000 bootstrap resamples in SmartPLS 4.1.1.2.Subsequently,mea-surement and structural models were assessed through confirmatory composite analysis(CCA),and common method variance(CMV)was checked using Harman’s single-factor test.Results:Exercise commitment significantly predicted PsyCap(β=0.171,p<0.05)and PsyCap significantly predicted flourishing(β=0.444,p<0.001).Mediation analysis confirmed that PsyCap fully mediated the relationship between exercise commitment and flourishing(β=0.071,p<0.05).Although the indirect effect may appear numerically small,it translated to a 7.1%increase in flourishing scores—a practically meaningful effect in social science contexts where even modest changes yield real-world impact.The findings empirically support the integration of two frameworks,highlighting both motivational(SCT)and affective(BBT)pathways through which exercise fosters multidimensional well-being.Conclusions:Theoretically,this study advances understanding of how cognitive and behavioral commitment contribute to the development of psychological resources that collectively drive flourishing.Practically,the results suggest that running programs targeting younger adults should focus on fostering PsyCap—via goal setting,social support,and digital engagement—to maximize well-being outcomes.Moreover,the findings have the potential to inform mental health promotion strategies beyond the Korean context.This study has several limitations,including a skewed sample resulting from convenience sampling,the lack of comparative analysis across different age cohorts,and the use of second-order constructs that may obscure dimension-specific effects.Future research should address these limitations by employing stratified sampling,adopting comparative study designs,and conducting model comparisons between first-and second-order constructs to elucidate both overarching and dimension-specific pathways.
文摘This study examined the relationships among workplace spirituality,mindfulness,mental well-being,and organizational commitment in professional female dancers.A total of 424 dancers from the United States participated in the survey.Structural equation modeling indicated that workplace spirituality was positively associated with both mental well-being and organizational commitment,whereas mindfulness was significantly related only to organizational commitment.Mental well-being was a significant predictor of organizational commitment and mediated the relationship between workplace spirituality and organizational commitment,but not between mindfulness and commitment.These results suggest that workplace spirituality functions as a psychological resource that enhances emotional health and strengthens organizational engagement.Thesefindings are consistent with self-determination theory,highlighting the role of value congruence and intrinsic purpose in sustaining motivation in high-performance contexts.Moreover,the studyfindings underscore the importance of fostering spiritually supportive work environments to promote psychological well-being and long-term organizational commitment.
基金partially supported by Korea Electrotechnology Research Institute(KERI)Primary research program through the National Research Council of Science&Technology(NST)funded by the Ministry of Science and ICT(MSIT)(No.25A01038)partially supported by the National Research Foundation of Korea(NRF)grant funded by the Korea government(MSIT)(No.RS-2024-00218377).
文摘In this paper,a strength-constrained unit commitment(UC)model incorporating system strength constraints based on the weighted short-circuit ratio(WSCR)is proposed.This model facilitates the comprehensive assessment of area-wide system strength in power systems with high inverter-based resource(IBR)penetration,thereby contributing to the mitigation of weak grid issues.Unlike traditional models,this approach considers the interactions among multiple IBRs.The UC problem is initially formulated as a mixed-integer nonlinear programming(MINLP)model,reflecting WSCR and bus impedance matrix modification constraints.To enhance computational tractability,the model is transformed into a mixed-integer linear programming(MILP)form.The effectiveness of the proposed approach is validated through simulations on the IEEE 5-bus,IEEE 39-bus,and a modified Korean power system,demonstrating the ability of the proposed UC model enhancing system strength compared to the conventional methodologies.
基金funded by the Education and Teaching Reform Research Major Project of Anhui Province(2022xqhz023)(2023sx170).
文摘Objectives:College students face increasing mental health challenges.Although Acceptance and CommitmentTherapy(ACT)is effective,the efficacy of Internet-based ACT(iACT)needs further exploration.Methods:This study examines the efficacy of iACT on college students’mental health through a randomized controlled trial.We recruited 90 college students(19.16±1.02 years old)and randomly divided them into the iACT group,face-to-face ACT group,and control group.The effects of the interventions were evaluated using the comprehensive assessment of ACT processes(CompACT)and the Depression Anxiety Stress Scales(DASS-21).Results:Two-factor repeated measures ANOVA revealed a significant time main effect of iACT.Face-to-face ACT and iACT effectively improved college students’psychological flexibility[F(2,83)=18.78,p<0.001,η^(2)=0.18]and alleviated their negative emotions[F(2,82)=41.17,p<0.001,η^(2)=0.36].Face-to-face ACT exhibited sustained effects on improving participants’psychological flexibility and alleviating their negative emotions(p<0.001),while iACT showed no sustained effect on improving participants’psychological flexibility(p>0.05).Conclusion:While iACT and face-to-face ACT are effective shortterm interventions,face-to-face ACT demonstrates superior sustainability.Integrating guided sessions into iACT may enhance long-term outcomes.These findings advocate for blended interventions to address college students’mental health needs,particularly in resource-limited settings.
