In the current era of rapid development, excellent culture needs to be inherited and spread to the world. Therefore, it is essential to consider the translation of the 24 solar terms. China persists in the principle o...In the current era of rapid development, excellent culture needs to be inherited and spread to the world. Therefore, it is essential to consider the translation of the 24 solar terms. China persists in the principle of the Belt and Road Initiative, adheres to the guidance of Chinese traditional excellent culture goes global, and enhances the influence of Chinese culture on the words, the culture of the words communicating and developing constantly. This paper analyzes and compares translations of different versions, explores the necessity of translation strategies for translation, then summaries the translation strategy, ultimately figures out the development space, ted texts and promote the exchange of Chinese and foreign cultures.展开更多
Twenty four solar terms is a knowledge system formed by the ancients through long-term observation of the annual activities of the sun.Although it roughly reveals the changing rules of seasons,climate and phenology in...Twenty four solar terms is a knowledge system formed by the ancients through long-term observation of the annual activities of the sun.Although it roughly reveals the changing rules of seasons,climate and phenology in a year,and reflects the influence of the sun on the earth’s climate change on a large scale,because the ancients ignored the influence of the moon’s activities on the earth’s climate change on a small scale,the 24 solar terms they summarized often can not accurately predict the earth's climate change.In order to make the 24 solar terms reflect not only the influence of the sun on the earth's climate change on a large scale,but also the influence of the moon's activities on the earth's climate change on a small scale,we must refer to the key time nodes of the moon's activities to divide the 24 solar terms.That is to say,the first day(the seventh or twenty second day of the lunar calendar)after the“Greater Cold”of the old year should be set as the“Beginning of Spring”of the new year,and then the day after half a month should be the next solar term,which is the first day of the moon’s next visit to the Antarctic or the Arctic,and so on.In this way,the 24 solar terms are consistent with the key nodes of lunar activities,and can accurately predict the changes of the earth's climate.展开更多
The "Twenty-Four Solar Terms" is an integrated knowledge system and functional social practice initiated and developed by ancient Chinese. Appling to their daily lives and agricultural production, based on r...The "Twenty-Four Solar Terms" is an integrated knowledge system and functional social practice initiated and developed by ancient Chinese. Appling to their daily lives and agricultural production, based on records of the periodic motions of the sun, this knowledge system echoes seasonal and climate changes, phenological variation and reflects the features of ancient agricultural activities. As a comprehensive demonstration of their lives and production, it is a phenomenal achievement thanks to the ancient Chinese people's experience and wisdom. The "Twenty-Four Solar Terms" is also a cultural phenomenon unique to China, geographic location, the Yellow River Basin being at a mid-latitude zone with distinctive seasonal climate changes; its long-existing agrarian tradition, advanced agricultural philosophy and a harmonious lifestyle. In the meantime, while China's superior knowledge on astronomy made its formation technically possible, the "agriculture first" governmental policy and the "prefectures and counties" administrative system, introduced by governors from Qin and Han Dynasties, cultivated its formation institutionally. Besides, the "Twenty-Four Solar Terms" is the outcome of the harmonious civilization progress and traditional Chinese culture, which is different from Western Europe's aggressive and predatory industrial expansion. The "Twenty-Four Solar Terms" is still of great cultural and practical significance in China even today. It highlights the "unity of mankind and nature" philosophy and serves as another signature symbol of the Chinese culture. While China is more and more engaging in international affairs, the "Twenty-Four Solar Terms" facilitates the rest of the world to understand China from another angle.展开更多
This book combs through the Combination of the 24 Dynastic Histories and the New History of Yuan Dynasty and local chronicles of various regions and tells the origin of one of the intangible cultural heritages,the Twe...This book combs through the Combination of the 24 Dynastic Histories and the New History of Yuan Dynasty and local chronicles of various regions and tells the origin of one of the intangible cultural heritages,the Twenty-Four Solar Terms,and its uncommon story with traditional Chinese ritual-music culture.展开更多
The temperature thresholds and timings of the 24 climatic Solar Terms in China are determined from a homogenized dataset of the surface air temperature recorded at 549 meteorological stations for the period 1960-2008 ...The temperature thresholds and timings of the 24 climatic Solar Terms in China are determined from a homogenized dataset of the surface air temperature recorded at 549 meteorological stations for the period 1960-2008 employing the ensemble empirical mode decomposition method.Changes in the mean temperature and timing of the climatic solar terms are illustrated.The results show that in terms of the mean situation over China,the number of cold days such as those of Slight Cold and Great Cold has decreased,especially by 56.8% for Great Cold in the last 10 years(1998-2007) compared with in the 1960s.The number of hot days like those of Great Heat has increased by 81.4% in the last 10 years compared with in the 1960s.The timings of the climatic Solar Terms during the warming period(around spring) in the seasonal cycle have advanced significantly by more than 6 d,especially by 15 d for Rain Water,while those during the cooling period(around autumn) have delayed significantly by 5-6 d.These characteristics are mainly due to a warming shift of the whole seasonal cycle under global warming.However,the warming shift affects the different Solar Terms to various extents,more prominently in the spring than in the autumn.The warming tendencies for Rain Water,the Beginning of Spring,and the Waking of Insects are the largest,2.43?C,2.37?C,and 2.21?C,respectively,for the period 1961-2007 in China as a whole.Four particular phenology-related climatic Solar Terms,namely the Waking of Insects,Pure Brightness,Grain Full,and Grain in Ear,are found to have advanced almost everywhere.In semi-arid zones in northern China,advances of the timings of these four climatic Solar Terms are significant,12-16,4-8,4-8,and 8-12 d,respectively,for the period 1961-2007.These quantitative results provide a scientific base for climate change adaptation,especially in terms of agricultural planning and energy-saving management throughout a year.展开更多
Solar terms and festivals differ from and relate to each other in terms of application scope and cultural structure.The cultural association and application of the 24 Solar Terms are studied in the areas including phi...Solar terms and festivals differ from and relate to each other in terms of application scope and cultural structure.The cultural association and application of the 24 Solar Terms are studied in the areas including philosophy,farming and society,and are exhibited in the natural convergence of views on space and time,life and customs,as well as the facilitation of agricultural practice.The connotations of traditional Chinese festivals concern basic areas such as beliefs,rites,language,symbols,diets and art,which are exhibited in the co-existent "festival tokens," "festival events," "festival messages," "festival symbols," "festival food" and "festival art forms." Festivals feature fixed and periodic occurrence and multi-channel cultural inheritance.展开更多
China’s“24 Solar Terms”,known as the fifth invention after China’s hour Major Inventions,is a knowledge system and social practice formed through observations of the sun’s annual motion,and cognition of the year...China’s“24 Solar Terms”,known as the fifth invention after China’s hour Major Inventions,is a knowledge system and social practice formed through observations of the sun’s annual motion,and cognition of the year’s changes in season,climate and phenology.More and more people in the world have been eager to know more about it since UNESCO inscribed Chinas“24 Solar Terms”on the Representative List of the Intangible Cultural Heritage of Humanity in 2016.As a way of nurturing life,the Illustrated Daoyin of the 24 Solar Terms includes twenty-four exercise forms,corresponding to the 24 solar terms respectively,which reflects the significant idea of complying with the law of yin-yang changes in the universe.It presents a series of sitting and standing exercises designed to prevent diseases that occur during seasonal changes throughout the year.The ancient Chinese wisdom of time and life nurturing has been witnessed in China’s“24 Solar Terms”and“Illustrated Daoyin of the 24 Solar Terms”This article aims to arouse readers’concern and interest in life nurturing by introducing how to do all the exercises presented by the Illustrated Daoyin of the 24 Solar Terms,which is helpful to the prevention and cure of diseases as well as good for health.展开更多
Up to now,there are few academic studies on the great astronomer,Luoxia Hong and the English translation of the 24 Solar Terms.Through the study of Luoxia Hong and the 24 Solar Terms and their English translations,thi...Up to now,there are few academic studies on the great astronomer,Luoxia Hong and the English translation of the 24 Solar Terms.Through the study of Luoxia Hong and the 24 Solar Terms and their English translations,this paper aims to,firstly,further reconfirm the historical status of Luoxia Hong and secondly,make a comparative study of the different translation versions of 24 Solar Terms from the perspective of translation studies,so that more people,home and abroad,can get more familiar with the historical and cultural celebrity Luoxia Hong and traditional Chinese culture.展开更多
[Objective] The aim was to analyze the climatic characteristics of temperature in '24 solar terms' in Liaoning Province.[Method] Based on the daily temperature data from 56 stations in Liaoning Province from 1...[Objective] The aim was to analyze the climatic characteristics of temperature in '24 solar terms' in Liaoning Province.[Method] Based on the daily temperature data from 56 stations in Liaoning Province from 1951 to 2009,the climatic characteristics of temperature in '24 solar terms' in Liaoning Province in recent 59 years were analyzed.[Result] The time series of average temperature in '24 solar terms' in Liaoning Province showed quasi normal distribution from 1951 to 2009,namely single peak type.Great Heat meant the hottest time within one year,and next came Slight Heat,while Slight Cold was the coldest time within one year,and Great Cold took the second place.Among 24 solar terms,temperature increased most obviously in Tomb-sweeping Day,with the increase of 4.9 ℃,while temperature decreased most greatly in the Beginning of Winter,with the decrease of 5.1 ℃.There was obvious decadal variation in average temperature in Slight Heat,Great Heat,Slight Cold,Great Cold and the End of Heat which were closely related to temperature,and average temperature went up with time.From 1951-1980 to 1981-2009,average temperature in 22 solar terms showed increase trend,and there was no change in one solar term,while average temperature in one solar term decreased slightly,and average temperature in 24 solar terms increased by 0.66 ℃.[Conclusion] The study could provide scientific reference for meteorological service.展开更多
This paper assesses 4 years of operation of a 1.75 kW roof top solar PV system installed in a Sydney suburban house. The system consists of 10 PV panels, a DC/AC inverter, and a grid connected gross meter. Solar elect...This paper assesses 4 years of operation of a 1.75 kW roof top solar PV system installed in a Sydney suburban house. The system consists of 10 PV panels, a DC/AC inverter, and a grid connected gross meter. Solar electricity delivered to grid is verified with the results from a computer simulation package (PVSYST) by adopting the installed component specifications, operation conditions, and weather data of the site. The results show high consistency between the values of energy delivered to the grid measured by the energy company and the energy estimated by system simulation. New system performance indicator is developed and called the optimum performance compliance ratio (PCR). It is a measure of the compliance of the output of the designed PV system with the output which would be produced by the same system with a solar tracker. This indicator provides system designers, contractors and energy providers with the actual capacity of the system that they can offer the end-users.展开更多
In recent years, introduction of a renewable energy source such as solar energy is expected. However, solar radiation is not constant and power output of photovoltaic (PV) system is influenced by weather conditions. I...In recent years, introduction of a renewable energy source such as solar energy is expected. However, solar radiation is not constant and power output of photovoltaic (PV) system is influenced by weather conditions. It is difficult for getting to know accurate power output of PV system. In order to forecast the power output of PV system as accurate as possible, this paper proposes a decision technique of forecasting model for short-term-ahead power output of PV system based on solar radiation prediction. Application of Recurrent Neural Network (RNN) is shown for solar radiation prediction in this paper. The proposed method in this paper does not require complicated calculation, but mathematical model with only useful weather data. The validity of the proposed RNN is confirmed by comparing simulation results of solar radiation forecasting with that obtained from other展开更多
Accurate PV system simulators are implemented with expensive software platforms using paid irradiance data.The main purpose of this paper is to develop and validate a PV system simulator,beginning with a solar cell pa...Accurate PV system simulators are implemented with expensive software platforms using paid irradiance data.The main purpose of this paper is to develop and validate a PV system simulator,beginning with a solar cell parameter extraction model,then test and validate long-termIrradiance data using free online source(Typical Meteorological Year TMY in(PVGIS)European website),and finally building full solar generator simulator to run in working real conditions.Comparing results with Accurate Paid PV simulators(which use theMuneer model)showed good accuracy of the proposed simulator.Work flow starts with the Irradiance model’s data processing,then solar cell 5 parameters model data processing(to extract cell parameters),and finally full system simulator.MATLAB coding programs in real working conditions are used for simulation.Results of solar cell parameter extraction show 99.6%to 99.99%matching with data sheet and cell performance under standard test conditions.Systemmodel simulation output shows 8%less yearly generated energy compared to the PVGIS 2022 long-term simulation(hourly basis(one-year time)).This is due to incident energy variations(between the years 2016 and 2022)of 4.02%.The novelty of the algorithm is the methodology,as it tests irradiance data on an hourly basis and validates results for a whole continuous year.Also,the 5-parameter solar cell model is used to be validated in long term analysis,not only STC conditions and could be applied on any PV solar cell.The algorithm and block diagramused are scalable,modular,and interchangeable with similarmodels to be tested.This simulator could test severalmethods andmodels in solar pv technology.展开更多
In this study, atmospheric visibility (AV) data from Riyadh, Saudi Arabia (24.91<span style="white-space:nowrap;">˚</span>N, 46.41<span style="white-space:nowrap;">&#...In this study, atmospheric visibility (AV) data from Riyadh, Saudi Arabia (24.91<span style="white-space:nowrap;">˚</span>N, 46.41<span style="white-space:nowrap;">˚</span>E, 760 m), for the period 1976-2011 were utilized to investigate the interannual, monthly, and seasonal AV variations and trends. The magnitudes of these trends were characterized and tested using mann-kendall (MK) rank statistics at different significance levels. No significant trend in AV was observed during the 36-year period. However, a significant increase in the annual mean AV by 0.24 km per year for the period between 1976 and 1999 was found. For the period 1999-2011, AV decreased significantly by 0.16 km per year. The potential effects of air temperature and relative humidity on AV were investigated. While these two variables could explain the observed trend of AV over some periods, they failed to do so for the whole study period. To search for extraterrestrial causes for long-term AV variations, correlation analyses between the time series of cosmic ray (CR) data (measured by NM and muon detector) and solar activity (represented by sunspot number) and AV were conducted and showed that these two variables are able to explain the AV variations for the whole study period. Additionally, power spectra analyses were conducted to investigate periodicities in the AV time series. Several significant periodicities, such as 9.8, 5.2, 2.2, 1.7, and 1.3 years were recognized. The obtained periodicities were similar to those reported by several investigators and found in solar, interplanetary, and CR parameters. The spectral and correlation results suggested that, with the expected effects of terrestrial and meteorological conditions on AV, long-term AV variations can also be related to the solar activity and associated CR modulations.展开更多
文摘In the current era of rapid development, excellent culture needs to be inherited and spread to the world. Therefore, it is essential to consider the translation of the 24 solar terms. China persists in the principle of the Belt and Road Initiative, adheres to the guidance of Chinese traditional excellent culture goes global, and enhances the influence of Chinese culture on the words, the culture of the words communicating and developing constantly. This paper analyzes and compares translations of different versions, explores the necessity of translation strategies for translation, then summaries the translation strategy, ultimately figures out the development space, ted texts and promote the exchange of Chinese and foreign cultures.
文摘Twenty four solar terms is a knowledge system formed by the ancients through long-term observation of the annual activities of the sun.Although it roughly reveals the changing rules of seasons,climate and phenology in a year,and reflects the influence of the sun on the earth’s climate change on a large scale,because the ancients ignored the influence of the moon’s activities on the earth’s climate change on a small scale,the 24 solar terms they summarized often can not accurately predict the earth's climate change.In order to make the 24 solar terms reflect not only the influence of the sun on the earth's climate change on a large scale,but also the influence of the moon's activities on the earth's climate change on a small scale,we must refer to the key time nodes of the moon's activities to divide the 24 solar terms.That is to say,the first day(the seventh or twenty second day of the lunar calendar)after the“Greater Cold”of the old year should be set as the“Beginning of Spring”of the new year,and then the day after half a month should be the next solar term,which is the first day of the moon’s next visit to the Antarctic or the Arctic,and so on.In this way,the 24 solar terms are consistent with the key nodes of lunar activities,and can accurately predict the changes of the earth's climate.
文摘The "Twenty-Four Solar Terms" is an integrated knowledge system and functional social practice initiated and developed by ancient Chinese. Appling to their daily lives and agricultural production, based on records of the periodic motions of the sun, this knowledge system echoes seasonal and climate changes, phenological variation and reflects the features of ancient agricultural activities. As a comprehensive demonstration of their lives and production, it is a phenomenal achievement thanks to the ancient Chinese people's experience and wisdom. The "Twenty-Four Solar Terms" is also a cultural phenomenon unique to China, geographic location, the Yellow River Basin being at a mid-latitude zone with distinctive seasonal climate changes; its long-existing agrarian tradition, advanced agricultural philosophy and a harmonious lifestyle. In the meantime, while China's superior knowledge on astronomy made its formation technically possible, the "agriculture first" governmental policy and the "prefectures and counties" administrative system, introduced by governors from Qin and Han Dynasties, cultivated its formation institutionally. Besides, the "Twenty-Four Solar Terms" is the outcome of the harmonious civilization progress and traditional Chinese culture, which is different from Western Europe's aggressive and predatory industrial expansion. The "Twenty-Four Solar Terms" is still of great cultural and practical significance in China even today. It highlights the "unity of mankind and nature" philosophy and serves as another signature symbol of the Chinese culture. While China is more and more engaging in international affairs, the "Twenty-Four Solar Terms" facilitates the rest of the world to understand China from another angle.
文摘This book combs through the Combination of the 24 Dynastic Histories and the New History of Yuan Dynasty and local chronicles of various regions and tells the origin of one of the intangible cultural heritages,the Twenty-Four Solar Terms,and its uncommon story with traditional Chinese ritual-music culture.
基金supported by the National Basic Research Program of China (2011CB952000 and 2009CB421401)the "Strategic Priority Research Program" of the Chinese Academy of Sciences (XDA05090100)the National Natural Science Foundation of China (41005039 and 40810059003)
文摘The temperature thresholds and timings of the 24 climatic Solar Terms in China are determined from a homogenized dataset of the surface air temperature recorded at 549 meteorological stations for the period 1960-2008 employing the ensemble empirical mode decomposition method.Changes in the mean temperature and timing of the climatic solar terms are illustrated.The results show that in terms of the mean situation over China,the number of cold days such as those of Slight Cold and Great Cold has decreased,especially by 56.8% for Great Cold in the last 10 years(1998-2007) compared with in the 1960s.The number of hot days like those of Great Heat has increased by 81.4% in the last 10 years compared with in the 1960s.The timings of the climatic Solar Terms during the warming period(around spring) in the seasonal cycle have advanced significantly by more than 6 d,especially by 15 d for Rain Water,while those during the cooling period(around autumn) have delayed significantly by 5-6 d.These characteristics are mainly due to a warming shift of the whole seasonal cycle under global warming.However,the warming shift affects the different Solar Terms to various extents,more prominently in the spring than in the autumn.The warming tendencies for Rain Water,the Beginning of Spring,and the Waking of Insects are the largest,2.43?C,2.37?C,and 2.21?C,respectively,for the period 1961-2007 in China as a whole.Four particular phenology-related climatic Solar Terms,namely the Waking of Insects,Pure Brightness,Grain Full,and Grain in Ear,are found to have advanced almost everywhere.In semi-arid zones in northern China,advances of the timings of these four climatic Solar Terms are significant,12-16,4-8,4-8,and 8-12 d,respectively,for the period 1961-2007.These quantitative results provide a scientific base for climate change adaptation,especially in terms of agricultural planning and energy-saving management throughout a year.
基金a staged research result of "Studies on China’s Newly Emerged Festival Activities"funded by the Central Research Institute of Culture and History
文摘Solar terms and festivals differ from and relate to each other in terms of application scope and cultural structure.The cultural association and application of the 24 Solar Terms are studied in the areas including philosophy,farming and society,and are exhibited in the natural convergence of views on space and time,life and customs,as well as the facilitation of agricultural practice.The connotations of traditional Chinese festivals concern basic areas such as beliefs,rites,language,symbols,diets and art,which are exhibited in the co-existent "festival tokens," "festival events," "festival messages," "festival symbols," "festival food" and "festival art forms." Festivals feature fixed and periodic occurrence and multi-channel cultural inheritance.
基金Research Base Projects of Beijing Social Science Foundation(No.17JDYYB002)。
文摘China’s“24 Solar Terms”,known as the fifth invention after China’s hour Major Inventions,is a knowledge system and social practice formed through observations of the sun’s annual motion,and cognition of the year’s changes in season,climate and phenology.More and more people in the world have been eager to know more about it since UNESCO inscribed Chinas“24 Solar Terms”on the Representative List of the Intangible Cultural Heritage of Humanity in 2016.As a way of nurturing life,the Illustrated Daoyin of the 24 Solar Terms includes twenty-four exercise forms,corresponding to the 24 solar terms respectively,which reflects the significant idea of complying with the law of yin-yang changes in the universe.It presents a series of sitting and standing exercises designed to prevent diseases that occur during seasonal changes throughout the year.The ancient Chinese wisdom of time and life nurturing has been witnessed in China’s“24 Solar Terms”and“Illustrated Daoyin of the 24 Solar Terms”This article aims to arouse readers’concern and interest in life nurturing by introducing how to do all the exercises presented by the Illustrated Daoyin of the 24 Solar Terms,which is helpful to the prevention and cure of diseases as well as good for health.
基金This paper is funded by Luoxia Hong Research Center Project 2019,the Education Department of Sichu an Province(Project No.:LXHYJB1901).
文摘Up to now,there are few academic studies on the great astronomer,Luoxia Hong and the English translation of the 24 Solar Terms.Through the study of Luoxia Hong and the 24 Solar Terms and their English translations,this paper aims to,firstly,further reconfirm the historical status of Luoxia Hong and secondly,make a comparative study of the different translation versions of 24 Solar Terms from the perspective of translation studies,so that more people,home and abroad,can get more familiar with the historical and cultural celebrity Luoxia Hong and traditional Chinese culture.
文摘[Objective] The aim was to analyze the climatic characteristics of temperature in '24 solar terms' in Liaoning Province.[Method] Based on the daily temperature data from 56 stations in Liaoning Province from 1951 to 2009,the climatic characteristics of temperature in '24 solar terms' in Liaoning Province in recent 59 years were analyzed.[Result] The time series of average temperature in '24 solar terms' in Liaoning Province showed quasi normal distribution from 1951 to 2009,namely single peak type.Great Heat meant the hottest time within one year,and next came Slight Heat,while Slight Cold was the coldest time within one year,and Great Cold took the second place.Among 24 solar terms,temperature increased most obviously in Tomb-sweeping Day,with the increase of 4.9 ℃,while temperature decreased most greatly in the Beginning of Winter,with the decrease of 5.1 ℃.There was obvious decadal variation in average temperature in Slight Heat,Great Heat,Slight Cold,Great Cold and the End of Heat which were closely related to temperature,and average temperature went up with time.From 1951-1980 to 1981-2009,average temperature in 22 solar terms showed increase trend,and there was no change in one solar term,while average temperature in one solar term decreased slightly,and average temperature in 24 solar terms increased by 0.66 ℃.[Conclusion] The study could provide scientific reference for meteorological service.
文摘This paper assesses 4 years of operation of a 1.75 kW roof top solar PV system installed in a Sydney suburban house. The system consists of 10 PV panels, a DC/AC inverter, and a grid connected gross meter. Solar electricity delivered to grid is verified with the results from a computer simulation package (PVSYST) by adopting the installed component specifications, operation conditions, and weather data of the site. The results show high consistency between the values of energy delivered to the grid measured by the energy company and the energy estimated by system simulation. New system performance indicator is developed and called the optimum performance compliance ratio (PCR). It is a measure of the compliance of the output of the designed PV system with the output which would be produced by the same system with a solar tracker. This indicator provides system designers, contractors and energy providers with the actual capacity of the system that they can offer the end-users.
文摘In recent years, introduction of a renewable energy source such as solar energy is expected. However, solar radiation is not constant and power output of photovoltaic (PV) system is influenced by weather conditions. It is difficult for getting to know accurate power output of PV system. In order to forecast the power output of PV system as accurate as possible, this paper proposes a decision technique of forecasting model for short-term-ahead power output of PV system based on solar radiation prediction. Application of Recurrent Neural Network (RNN) is shown for solar radiation prediction in this paper. The proposed method in this paper does not require complicated calculation, but mathematical model with only useful weather data. The validity of the proposed RNN is confirmed by comparing simulation results of solar radiation forecasting with that obtained from other
文摘Accurate PV system simulators are implemented with expensive software platforms using paid irradiance data.The main purpose of this paper is to develop and validate a PV system simulator,beginning with a solar cell parameter extraction model,then test and validate long-termIrradiance data using free online source(Typical Meteorological Year TMY in(PVGIS)European website),and finally building full solar generator simulator to run in working real conditions.Comparing results with Accurate Paid PV simulators(which use theMuneer model)showed good accuracy of the proposed simulator.Work flow starts with the Irradiance model’s data processing,then solar cell 5 parameters model data processing(to extract cell parameters),and finally full system simulator.MATLAB coding programs in real working conditions are used for simulation.Results of solar cell parameter extraction show 99.6%to 99.99%matching with data sheet and cell performance under standard test conditions.Systemmodel simulation output shows 8%less yearly generated energy compared to the PVGIS 2022 long-term simulation(hourly basis(one-year time)).This is due to incident energy variations(between the years 2016 and 2022)of 4.02%.The novelty of the algorithm is the methodology,as it tests irradiance data on an hourly basis and validates results for a whole continuous year.Also,the 5-parameter solar cell model is used to be validated in long term analysis,not only STC conditions and could be applied on any PV solar cell.The algorithm and block diagramused are scalable,modular,and interchangeable with similarmodels to be tested.This simulator could test severalmethods andmodels in solar pv technology.
文摘In this study, atmospheric visibility (AV) data from Riyadh, Saudi Arabia (24.91<span style="white-space:nowrap;">˚</span>N, 46.41<span style="white-space:nowrap;">˚</span>E, 760 m), for the period 1976-2011 were utilized to investigate the interannual, monthly, and seasonal AV variations and trends. The magnitudes of these trends were characterized and tested using mann-kendall (MK) rank statistics at different significance levels. No significant trend in AV was observed during the 36-year period. However, a significant increase in the annual mean AV by 0.24 km per year for the period between 1976 and 1999 was found. For the period 1999-2011, AV decreased significantly by 0.16 km per year. The potential effects of air temperature and relative humidity on AV were investigated. While these two variables could explain the observed trend of AV over some periods, they failed to do so for the whole study period. To search for extraterrestrial causes for long-term AV variations, correlation analyses between the time series of cosmic ray (CR) data (measured by NM and muon detector) and solar activity (represented by sunspot number) and AV were conducted and showed that these two variables are able to explain the AV variations for the whole study period. Additionally, power spectra analyses were conducted to investigate periodicities in the AV time series. Several significant periodicities, such as 9.8, 5.2, 2.2, 1.7, and 1.3 years were recognized. The obtained periodicities were similar to those reported by several investigators and found in solar, interplanetary, and CR parameters. The spectral and correlation results suggested that, with the expected effects of terrestrial and meteorological conditions on AV, long-term AV variations can also be related to the solar activity and associated CR modulations.