Short-term load forecasting(STLF)can be utilized to predict usage fluctuation in a short time period and accurate forecasting can save a big chunk of a country’s economic loss.This paper introduces the crafting of va...Short-term load forecasting(STLF)can be utilized to predict usage fluctuation in a short time period and accurate forecasting can save a big chunk of a country’s economic loss.This paper introduces the crafting of various features for hourly electric load forecasting on three different datasets using four different models XGBoost,LightGBM,Bi-LSTM,and Random Forest.The importance of crafted features over basic features was analysed by different evaluation metrics MAE,RMSE,R-squared,and MAPE.Evaluation metrics showed that prediction accuracy increased significantly with crafted features in comparison to basic features for all four models.We also showcased the ability of the Polar Bear Optimisation(PBO)algorithm for hyperparameter tuning of the machine learning models in STLF.Optimized hyperparameters with PBO effectively decreased RMSE,MAE,and MAPE and improved the model prediction,showcasing the capability of the PBO in hyperparameter tuning for STLF.PBO was compared with commonly used optimization algorithms like particle swarm optimization(PSO)and genetic algorithm(GA).GA was the least performing with XGBoost,LightGBM,and Random Forest.PSO and PBO were comparable with XGBoost LightGBM and Random Forest while PBO highly surpassed PSO with the Bi-LSTM model.Hence PBO was proved to be highly effective for hyperparameter tuning for implementation in short-term electric load forecasting.展开更多
I've always been interested in traditional crafts,so when my school organized a workshop on wood carving,an ancient Chinese art form,I signed up right away.The workshop was held in a small studio in the old town.A...I've always been interested in traditional crafts,so when my school organized a workshop on wood carving,an ancient Chinese art form,I signed up right away.The workshop was held in a small studio in the old town.As I walked in,I was greeted by the smell of wood and the sound made by carving wood.The teacher,Mr Zhang,was a master carver with over 30 years of experience.He showed us some of his works-beautiful sculptures of animals and flowers.I was amazed by the skill and patience it must have taken to create them.展开更多
At dawn in Wufu Village,in Dinghu District of Zhaoqing City,Guangdong Province,the newly restored Chaoyangli Cultural Retreat is already welcoming its first visitors.A visitor surnamed Chen,who has travelled from Guan...At dawn in Wufu Village,in Dinghu District of Zhaoqing City,Guangdong Province,the newly restored Chaoyangli Cultural Retreat is already welcoming its first visitors.A visitor surnamed Chen,who has travelled from Guangzhou with his child,stops in front of the Chaxi Academy to admire local intangible cultural heritage crafts.展开更多
OVER 2,000 years ago,the bronze craftsmen in today’s Datong City,Shanxi Province,had already mastered the superb skills of copper production.Datong bronze-making craft was included in China’s state-level intangible ...OVER 2,000 years ago,the bronze craftsmen in today’s Datong City,Shanxi Province,had already mastered the superb skills of copper production.Datong bronze-making craft was included in China’s state-level intangible cultural heritage list in 2014.The craftsmanship which has been passed down through the millennia still shines brightly today after countless hammer blows and engravings.展开更多
A young artist reinvents an old sartorial skill from rural ethnic communities into globally recognized high fashion.LACKING a unified writing system,the ancestors of the Miao people,an ethnic group primarily living in...A young artist reinvents an old sartorial skill from rural ethnic communities into globally recognized high fashion.LACKING a unified writing system,the ancestors of the Miao people,an ethnic group primarily living in mountainous areas in central and southwestern China,encoded their history in the exquisite design of traditional clothing,especially embroidery.They express reverence for nature and appreciation of life with needles and threads.展开更多
This study explored the role of job crafting and job embeddedness in the relationship between employee strengths use and thriving at work.Participants were 260 nurses from Beijing,China(99.2%female,54.6%aged 26–35 ye...This study explored the role of job crafting and job embeddedness in the relationship between employee strengths use and thriving at work.Participants were 260 nurses from Beijing,China(99.2%female,54.6%aged 26–35 years,and 62%with a bachelor’s degree or above).Data were collected at two different time points,with a two-week interval between them.Regression analysis and path analysis were applied to test the hypotheses.Results showed that strengths use was associated with thriving at work.Job crafting partially mediated this relationship for higher thriving at work.Job embeddedness weakened the relationship between strengths use and job crafting,and also lowered job crafting effects on work thriving.These findings provide insights into the mechanisms by which strengths use influences thriving at work,highlighting the significance of job crafting and job embeddedness.展开更多
The dynamic behavior of high-speed craft navigating through variable sea states plays a pivotal role in ensuring maritime safety.However,many existing simulation approaches rely on linear or overly simplified represen...The dynamic behavior of high-speed craft navigating through variable sea states plays a pivotal role in ensuring maritime safety.However,many existing simulation approaches rely on linear or overly simplified representations of the marine environment,thereby limiting the fidelity of motion predictions.This study explores the motion characteristics of a 4.5-t high-speed vessel by conducting fully coupled numerical simulations using the STAR-CCM+software.The analysis considers both calm and varying sea conditions,incorporating fluctuations in wave height,wavelength,and wind speed to reflect more realistic operating scenarios.Simulation results reveal that the vessel’s hydrodynamic response is highly sensitive to changes in sea state.As conditions deteriorate,the free surface becomes increasingly complex,with higher wave amplitudes and more pronounced interactions between the waves generated by the vessel and those imposed by the external environment.These effects lead to significant increases in roll,pitch,heave,and sway motions,thereby imposing greater demands on the vessel’s dynamic stability and operational safety.Furthermore,both hydrodynamic resistance and propulsive thrust exhibit notable dependence on sea state and vessel speed.Total resistance generally increases with rougher sea conditions,while thrust tends to rise with increasing forward speed.Under calm or mildly disturbed waters,a Froude number(Fr)of 0.5 appears to offer an optimal balance for initiating and controlling primary motions such as roll,pitch,heave,and sway.Conversely,in more challenging conditions-such as those represented by a Sea State 3-effective motion control is better achieved at a higher Froude number of approximately 1.0.展开更多
The art of polychrome lacquer painting with gold tracing and inlay represents the culmination of traditional Chinese lacquer craftsmanship.It integrates four core techniques-lacquer application,polychrome painting,gol...The art of polychrome lacquer painting with gold tracing and inlay represents the culmination of traditional Chinese lacquer craftsmanship.It integrates four core techniques-lacquer application,polychrome painting,gold tracing,and inlay-embodying the pinnacle of ancient artisan ingenuity.This paper begins by outlining the historical origins,technical characteristics,and cultural significance of this art form.Subsequently,using a Qing Dynasty“Hanging Screen Inlaid with Boxwood and Coral Depicting the Scene of Sudhana Paying Homage to Guanyin,with Polychrome Lacquer Painting and Gold Tracing”as a case study,it offers an in-depth analysis of its craftsmanship,visual elements,thematic narrative,and cultural connotations.The study aims to unveil its artistic value and contemporary relevance as a form of“living cultural heritage.”展开更多
The Chinese incense burner,a cornerstone of material culture,embodies distinguished craftsmanship and reflects sociocultural evolution across ritual,religious,and domestic life.Through analysis of a Qing-dynasty coppe...The Chinese incense burner,a cornerstone of material culture,embodies distinguished craftsmanship and reflects sociocultural evolution across ritual,religious,and domestic life.Through analysis of a Qing-dynasty copper Ding-style censer with gold and silver inlay,this paper examines its antique form,masterly technique,and decorative motifs.It demonstrates how such objects synthesize the cultural ethos of the Kang-Qian era by uniting Ming-Song literati classicism with consummate imperial artistry.This case study thus provides a focused lens on the critical interplay between elite taste and technical execution in the history of Chinese craftsmanship.展开更多
This article explores the transformative process of the philosophical concepts in new craft arts,along with the interactive relationship between technological logic and cultural expression,within the context of digita...This article explores the transformative process of the philosophical concepts in new craft arts,along with the interactive relationship between technological logic and cultural expression,within the context of digital intelligence empowerment.Through an analysis of specific artworks,it aims to reveal the potential value of digital intelligence technologies in shaping contemporary craft arts,particularly in terms of artistic expression,cultural heritage,and social responsibility.展开更多
This study introduces an enhanced adaptive fractional-order nonsingular terminal sliding mode controller(AFONTSMC)tailored for stabilizing a fully submerged hydrofoil craft(FSHC)under external disturbances,model uncer...This study introduces an enhanced adaptive fractional-order nonsingular terminal sliding mode controller(AFONTSMC)tailored for stabilizing a fully submerged hydrofoil craft(FSHC)under external disturbances,model uncertainties,and actuator saturation.A novel nonlinear disturbance observer modified by fractional-order calculus is proposed for flexible and less conservative estimation of lumped disturbances.An enhanced adaptive fractional-order nonsingular sliding mode scheme augmented by disturbance estimation is also introduced to improve disturbance rejection.This controller design only necessitates surpassing the estimation error rather than adhering strictly to the disturbance upper bound.Additionally,an adaptive fast-reaching law with a hyperbolic tangent function is incorporated to enhance the responsiveness and convergence rates of the controller,thereby reducing chattering.Furthermore,an auxiliary actuator compensator is developed to address saturation effects.The resultant closed system of the FSHC with the designed controller is globally asymptotically stable.展开更多
聚变堆主机关键系统综合研究设施(Comprehensive Research Facility for Fusion Technology,CRAFT)超临界氦阀箱内的超临界氦循环泵为超导磁体提供大流量超临界氦,根据功能要求对超临界氦泵体的隔热区域进行了隔热设计。确定了氦循环泵...聚变堆主机关键系统综合研究设施(Comprehensive Research Facility for Fusion Technology,CRAFT)超临界氦阀箱内的超临界氦循环泵为超导磁体提供大流量超临界氦,根据功能要求对超临界氦泵体的隔热区域进行了隔热设计。确定了氦循环泵的隔热结构,计算分析了热沉位置范围,对氦循环泵的漏热量进行了核算;采用仿真软件ANSYS,数值分析了氦循环泵的隔热性能和热沉位置对泵体漏热的影响,结果显示热沉位置H为0.064 m时,可保证液氦质量流量,泵体漏热达到最小值8.71 W,满足此值小于10 W的指标要求。展开更多
基金supported by the project FlexEnergy under the call 09I02-03-V2-Transformation and innovation consortia.
文摘Short-term load forecasting(STLF)can be utilized to predict usage fluctuation in a short time period and accurate forecasting can save a big chunk of a country’s economic loss.This paper introduces the crafting of various features for hourly electric load forecasting on three different datasets using four different models XGBoost,LightGBM,Bi-LSTM,and Random Forest.The importance of crafted features over basic features was analysed by different evaluation metrics MAE,RMSE,R-squared,and MAPE.Evaluation metrics showed that prediction accuracy increased significantly with crafted features in comparison to basic features for all four models.We also showcased the ability of the Polar Bear Optimisation(PBO)algorithm for hyperparameter tuning of the machine learning models in STLF.Optimized hyperparameters with PBO effectively decreased RMSE,MAE,and MAPE and improved the model prediction,showcasing the capability of the PBO in hyperparameter tuning for STLF.PBO was compared with commonly used optimization algorithms like particle swarm optimization(PSO)and genetic algorithm(GA).GA was the least performing with XGBoost,LightGBM,and Random Forest.PSO and PBO were comparable with XGBoost LightGBM and Random Forest while PBO highly surpassed PSO with the Bi-LSTM model.Hence PBO was proved to be highly effective for hyperparameter tuning for implementation in short-term electric load forecasting.
文摘I've always been interested in traditional crafts,so when my school organized a workshop on wood carving,an ancient Chinese art form,I signed up right away.The workshop was held in a small studio in the old town.As I walked in,I was greeted by the smell of wood and the sound made by carving wood.The teacher,Mr Zhang,was a master carver with over 30 years of experience.He showed us some of his works-beautiful sculptures of animals and flowers.I was amazed by the skill and patience it must have taken to create them.
文摘At dawn in Wufu Village,in Dinghu District of Zhaoqing City,Guangdong Province,the newly restored Chaoyangli Cultural Retreat is already welcoming its first visitors.A visitor surnamed Chen,who has travelled from Guangzhou with his child,stops in front of the Chaxi Academy to admire local intangible cultural heritage crafts.
文摘OVER 2,000 years ago,the bronze craftsmen in today’s Datong City,Shanxi Province,had already mastered the superb skills of copper production.Datong bronze-making craft was included in China’s state-level intangible cultural heritage list in 2014.The craftsmanship which has been passed down through the millennia still shines brightly today after countless hammer blows and engravings.
文摘A young artist reinvents an old sartorial skill from rural ethnic communities into globally recognized high fashion.LACKING a unified writing system,the ancestors of the Miao people,an ethnic group primarily living in mountainous areas in central and southwestern China,encoded their history in the exquisite design of traditional clothing,especially embroidery.They express reverence for nature and appreciation of life with needles and threads.
基金This study received funding from the Youth Project of Humanities and Social Sciences Research at Guizhou University(No.GDQN2022010)the Zhiyuan Science Foundation at Beijing Institute of Petrochemical Technology(No.BIPTCSF-2023012)the URT Program for Undergraduate Research and Training at Beijing Institute of Petrochemical Technology(No.2024J00263).
文摘This study explored the role of job crafting and job embeddedness in the relationship between employee strengths use and thriving at work.Participants were 260 nurses from Beijing,China(99.2%female,54.6%aged 26–35 years,and 62%with a bachelor’s degree or above).Data were collected at two different time points,with a two-week interval between them.Regression analysis and path analysis were applied to test the hypotheses.Results showed that strengths use was associated with thriving at work.Job crafting partially mediated this relationship for higher thriving at work.Job embeddedness weakened the relationship between strengths use and job crafting,and also lowered job crafting effects on work thriving.These findings provide insights into the mechanisms by which strengths use influences thriving at work,highlighting the significance of job crafting and job embeddedness.
基金funded by the National College Students Innovation and Entrepreneurship Training Program(202411646031)the Zhejiang Xinmiao Talents Program(2024R405A052)the SRIP Research Program of Ningbo University(2025SRIP1707).
文摘The dynamic behavior of high-speed craft navigating through variable sea states plays a pivotal role in ensuring maritime safety.However,many existing simulation approaches rely on linear or overly simplified representations of the marine environment,thereby limiting the fidelity of motion predictions.This study explores the motion characteristics of a 4.5-t high-speed vessel by conducting fully coupled numerical simulations using the STAR-CCM+software.The analysis considers both calm and varying sea conditions,incorporating fluctuations in wave height,wavelength,and wind speed to reflect more realistic operating scenarios.Simulation results reveal that the vessel’s hydrodynamic response is highly sensitive to changes in sea state.As conditions deteriorate,the free surface becomes increasingly complex,with higher wave amplitudes and more pronounced interactions between the waves generated by the vessel and those imposed by the external environment.These effects lead to significant increases in roll,pitch,heave,and sway motions,thereby imposing greater demands on the vessel’s dynamic stability and operational safety.Furthermore,both hydrodynamic resistance and propulsive thrust exhibit notable dependence on sea state and vessel speed.Total resistance generally increases with rougher sea conditions,while thrust tends to rise with increasing forward speed.Under calm or mildly disturbed waters,a Froude number(Fr)of 0.5 appears to offer an optimal balance for initiating and controlling primary motions such as roll,pitch,heave,and sway.Conversely,in more challenging conditions-such as those represented by a Sea State 3-effective motion control is better achieved at a higher Froude number of approximately 1.0.
文摘The art of polychrome lacquer painting with gold tracing and inlay represents the culmination of traditional Chinese lacquer craftsmanship.It integrates four core techniques-lacquer application,polychrome painting,gold tracing,and inlay-embodying the pinnacle of ancient artisan ingenuity.This paper begins by outlining the historical origins,technical characteristics,and cultural significance of this art form.Subsequently,using a Qing Dynasty“Hanging Screen Inlaid with Boxwood and Coral Depicting the Scene of Sudhana Paying Homage to Guanyin,with Polychrome Lacquer Painting and Gold Tracing”as a case study,it offers an in-depth analysis of its craftsmanship,visual elements,thematic narrative,and cultural connotations.The study aims to unveil its artistic value and contemporary relevance as a form of“living cultural heritage.”
文摘The Chinese incense burner,a cornerstone of material culture,embodies distinguished craftsmanship and reflects sociocultural evolution across ritual,religious,and domestic life.Through analysis of a Qing-dynasty copper Ding-style censer with gold and silver inlay,this paper examines its antique form,masterly technique,and decorative motifs.It demonstrates how such objects synthesize the cultural ethos of the Kang-Qian era by uniting Ming-Song literati classicism with consummate imperial artistry.This case study thus provides a focused lens on the critical interplay between elite taste and technical execution in the history of Chinese craftsmanship.
文摘This article explores the transformative process of the philosophical concepts in new craft arts,along with the interactive relationship between technological logic and cultural expression,within the context of digital intelligence empowerment.Through an analysis of specific artworks,it aims to reveal the potential value of digital intelligence technologies in shaping contemporary craft arts,particularly in terms of artistic expression,cultural heritage,and social responsibility.
基金Supported by Natural Science Basic Research Program of Shaanxi under Grant No.2023-JC-QN-0751,No.2023-JC-QN-0778Fundamental Research Funds for the Central Universities,CHD under Grant No.300102324102+1 种基金the National Natural Science Foundation of China under Grant Nos.72471035,52271313Fundamental Research Funds for the Central Universities under Grant No.XK2040021004025.
文摘This study introduces an enhanced adaptive fractional-order nonsingular terminal sliding mode controller(AFONTSMC)tailored for stabilizing a fully submerged hydrofoil craft(FSHC)under external disturbances,model uncertainties,and actuator saturation.A novel nonlinear disturbance observer modified by fractional-order calculus is proposed for flexible and less conservative estimation of lumped disturbances.An enhanced adaptive fractional-order nonsingular sliding mode scheme augmented by disturbance estimation is also introduced to improve disturbance rejection.This controller design only necessitates surpassing the estimation error rather than adhering strictly to the disturbance upper bound.Additionally,an adaptive fast-reaching law with a hyperbolic tangent function is incorporated to enhance the responsiveness and convergence rates of the controller,thereby reducing chattering.Furthermore,an auxiliary actuator compensator is developed to address saturation effects.The resultant closed system of the FSHC with the designed controller is globally asymptotically stable.
文摘聚变堆主机关键系统综合研究设施(Comprehensive Research Facility for Fusion Technology,CRAFT)超临界氦阀箱内的超临界氦循环泵为超导磁体提供大流量超临界氦,根据功能要求对超临界氦泵体的隔热区域进行了隔热设计。确定了氦循环泵的隔热结构,计算分析了热沉位置范围,对氦循环泵的漏热量进行了核算;采用仿真软件ANSYS,数值分析了氦循环泵的隔热性能和热沉位置对泵体漏热的影响,结果显示热沉位置H为0.064 m时,可保证液氦质量流量,泵体漏热达到最小值8.71 W,满足此值小于10 W的指标要求。
