In this paper, a mathematical model about the optimal booking level problem in airline overbooking rnanageanent is proposed. Firstly, the normal distribution is employed to approximate Poisson requests and binomial go...In this paper, a mathematical model about the optimal booking level problem in airline overbooking rnanageanent is proposed. Firstly, the normal distribution is employed to approximate Poisson requests and binomial goshows. By calculating the mean loss, a model to describe the relationship between booking level and flight revenue is established. Then, an equation is deduced to decide the optimal booking level. Finally, a numerical example is utilized to illustrate the proposed model and discuss the impact of refund rate on the optimal booking level and the mean loss.展开更多
<span style="font-family:Verdana;">With the rise of population and the industrial revolution, it is obvious that hotels and resorts are increasing drastically day by day. In the 21st century, tourism i...<span style="font-family:Verdana;">With the rise of population and the industrial revolution, it is obvious that hotels and resorts are increasing drastically day by day. In the 21st century, tourism is a trend. Everyone loves to travel and the reasons vary from person to person. Whether it is to have a cheerful and peaceful mind and place or business purposes, either way, hotels and resorts actually doing their jobs very well. This, tourism is a promising sector for any country and Bangladesh is no different. But the problem is we have to do the hotel booking and reservation manually most of the time. Sometimes it is too troublesome and knowing about the suitable hotels and resorts is too difficult. Though there are some online platforms available, they are not our country-oriented such as the payment system is not preferable for us. To solve this problem Vhromon is developed, a comparison-based hotel and resort booking system where anyone can book a hotel or resort by just login from the internet. Vhromon is an interactive online platform and it is user-friendly and easy to get like most of the platforms available nowadays. But they do not have all the hotels and resorts enlisted, only the well-known ones. On the other hand, Vhromon has everything enlisted where customers can compare them and can choose the right one for them. Furthermore, this system has a vendor panel where any hotel or resort owner can add their hotel or resort easily without any hassle, unlike the existing one.</span>展开更多
Asymptomatic bacteriuria is common in pregnant women and if untreated could lead to serious complications. Despite this, its prevalence and microbiological characteristics have not been well studied in Kano and they v...Asymptomatic bacteriuria is common in pregnant women and if untreated could lead to serious complications. Despite this, its prevalence and microbiological characteristics have not been well studied in Kano and they vary among different populations. The objective of the study was to determine the prevalence, microbiological characteristics and pregnancy outcome of asymptomatic bacteriuria in pregnancy among women who came for antenatal booking clinic at the Aminu Kano Teaching Hospital (AKTH) Kano. A cross sectional descriptive study was conducted among randomly selected 200 consenting pregnant women who came for antenatal booking from November 2010 to January 2011. Samples of 10 - 15 mls urine were examined for pus cells and bacteria and then cultured on cysteine lactose electrolyte deficient agar. Colony counts yielding bacterial growth of 105/ml or more of pure isolates were deemed significant. Isolates were identified to specie level. Antibiotic sensitivity test was done, treatment was given and pregnancy outcome was determined. Urinalysis and Full Blood Count were done. The prevalence of asymptomatic bacteriuria in pregnancy was 9%. Parity and Pyuria had statistically significant association with asymptomatic bacteriuria (P < 0.05). The commonest organisms isolated wereKlebsiella?spp. and?Staphylococcus saprophyticus. Following treatment of asymptomatic bacteriuria, there was no statistically significant difference in pregnancy outcome compared to patients who did not have the condition. The incidence of asymptomatic bacteriuria in pregnancy in AKTH is low. Screening of pregnant women using urine microscopy culture and sensitivity should be reserved for pregnant women with higher risk of developing asymptomatic bacteriuria.展开更多
Background: Placenta praevia accounts for significant maternal morbidity and perinatal morbidity and mortality. Despite advances in blood transfusion technique and surgical procedure, abnormal placentation still remai...Background: Placenta praevia accounts for significant maternal morbidity and perinatal morbidity and mortality. Despite advances in blood transfusion technique and surgical procedure, abnormal placentation still remains a difficult challenge for obstetricians. Objective: To determine the influence of booking status on the fetal and maternal outcome among parturients with placenta praevia that underwent caesarian delivery. Methodology: This was a comparative and retrospective study between booked and unbooked subjects with significant placenta praevia that were delivered by caesarian section between January 1<sup>st</sup> 2004 and December 31<sup>st</sup> 2008 with respect to maternal and fetal outcome. Result: Out of 14,344 deliveries during study period, 123 cases of placenta praevia that underwent caesarian delivery were identified giving a prevalence rate of 0.86%. 49 subjects were booked while 74 were unbooked. There was no statistically significant difference between booked and unbooked cases with respect to risk factors (30.6% of booked and 23% of unbooked), X<sup>2</sup>(4) = 7.203, P = 0.126 and the mean blood loss at surgery (870.4 ± 486.9 ml in booked versus 779.7 ± 380.96 ml in unbooked), X<sup>2</sup>(1) = 0.202, P = 0.653. However, antepartum transfusion (12.2% booked versus 34.7% unbooked) and postpartum transfusion (51% booked versus 72% unbooked) showed statistically significant difference, X<sup>2</sup>(1) = 9.744, P = 0.002. One maternal death occurred amongst the unbooked cases and none among the booked cases. Statistically significant differences were also noted in the apgar score at 1 minute X<sup>2</sup>(3) = 15.528, P = 0.001 and 5 minutes X<sup>2</sup>(3) = 12.912, P = 0.005 respectively. More babies died in the unbooked group (19) compared to two (2) in the booked mothers. Conclusion: Unbooked status in placenta previa significantly increases the risk for antepartum and postpartum transfusion, is associated with higher mortality, increased preterm delivery, poorer apgar scores and higher perinatal mortality rate.展开更多
James Lukudu has been attending school for nine years and, during that time, has never had his own textbook. He shared a single book with five to seven other students. But since the new school term began on September...James Lukudu has been attending school for nine years and, during that time, has never had his own textbook. He shared a single book with five to seven other students. But since the new school term began on September 10, Lukudu has turned the page in his schooling progress. Now in Form 2 at Winyi Secondary School in Eastern Equatoria State of South Sudan, Lukudu is a picture of confidence as he sits with his own textbooks in class. This turnaround has been made possible by the donation of more than 1.3 million textbooks and teacher＇s guidebooks by the Chinese Govern ment to South Sudan.展开更多
In recent years,machine learning has emerged as a powerful tool with widespread applications across various domains due to its ability to process and analyze vast amounts of data.This study explores the application of...In recent years,machine learning has emerged as a powerful tool with widespread applications across various domains due to its ability to process and analyze vast amounts of data.This study explores the application of machine learning techniques in predicting hotel booking cancellations using Property Management System(PMS)data.The research involves a comprehensive process,including data cleaning,feature engineering,feature selection,and model development.Feature selection and dimensionality reduction using Principal Component Analysis(PCA)and Lasso regression identified key predictive features,facilitating the rapid creation of neural network models.A diverse set of machine learning and deep learning models,such as Logistic Regression,Decision Tree,Random Forest,XGBoost,Multilayer Perceptron(MLP),Convolutional Neural Network(CNN),Deep Neural Network(DNN),and Long Short-Term Memory(LSTM),were employed.All models achieved accuracies exceeding 80%,with neural networks nearing 100%.These results highlight the efficacy of these models in predicting cancellations across different hotels,revealing consistent cancellation patterns.The study demonstrates the potential of machine learning to optimize hotel management by accurately forecasting booking cancellations,thereby reducing uncertainty and increasing revenue.Future work may focus on exploring more advanced feature engineering techniques and models to further enhance prediction accuracy and generalizability.展开更多
ISO releases two standards for tourism ISO 9468:2025,Tourism and related services-Online travel agency(OTA)-Guidelines for online accommodation booking platform services,and ISO 25639-1:2025,Exhibitions and events-Par...ISO releases two standards for tourism ISO 9468:2025,Tourism and related services-Online travel agency(OTA)-Guidelines for online accommodation booking platform services,and ISO 25639-1:2025,Exhibitions and events-Part 1:Vocabulary,were released recently,the development of which were led by China.展开更多
Two international standards on tourism,ISO 9468:2025,Tourism and related services-Online travel agency(OTA)-Guidelines for online accommodation booking platform services,and ISO 25639-1:2025,Exhibitions and events-Par...Two international standards on tourism,ISO 9468:2025,Tourism and related services-Online travel agency(OTA)-Guidelines for online accommodation booking platform services,and ISO 25639-1:2025,Exhibitions and events-Part 1:Vocabulary,were recently released by ISO,the development of which was led by China.展开更多
For k given graphs H_(1),...,H_(k) with k≥2,the k-color Ramsey number R(H_(1),...,H_(k)) represents the minimum integer N with the following property:if the edges of the complete graph K_(N) are colored with k colors...For k given graphs H_(1),...,H_(k) with k≥2,the k-color Ramsey number R(H_(1),...,H_(k)) represents the minimum integer N with the following property:if the edges of the complete graph K_(N) are colored with k colors,then there exists some i with 1≤i≤k such that K_(N) has a subgraph in color i isomorphic to H_(i).Let C_(m) be a cycle of length m and K_(1,n) a star of order n+1.In this paper,we systematically introduce the latest research progress on star-quadrilateral Ramsey numbers and provide an overview of Ramsey numbers concerning quadrilaterals,including multicolor cases.展开更多
Todo Mongolian ancient books are widely scattered among people,and many scholars have made ef⁃forts to collect and organize Todo Mongolian ancient books.Mr.Batu is one of the outstanding representa⁃tives.The ancient b...Todo Mongolian ancient books are widely scattered among people,and many scholars have made ef⁃forts to collect and organize Todo Mongolian ancient books.Mr.Batu is one of the outstanding representa⁃tives.The ancient books and related materials,notes,and other materials Todo Mongolian script he col⁃lected in are rich in content and have extremely high research value.They can provide valuable firsthand information for the academic community and promote in-depth research on the Tote Mongolian lan⁃guage.It is necessary to photocopy and publish them.展开更多
Iince rising to fame in 1987 on the television drama Sunshine After Rain,Singaporean artist Edmund Chen has starred in many films and TV series.He has also been active in theatre,hosting programs,and-more recently-pub...Iince rising to fame in 1987 on the television drama Sunshine After Rain,Singaporean artist Edmund Chen has starred in many films and TV series.He has also been active in theatre,hosting programs,and-more recently-publishing.Chen has authored 15 picture books and two art activity books for children,earning recognition as Southeast Asia’s Best Emerging Children’s Author.Today,he remains a prominent figure in public,not just as an actor but also as a writer and illustrator.展开更多
Hello!My name is Angel.I am an active girl.I am ten years old.I am in Class 1,Grade 5.I want to share my hobbies.First,I like reading books.Books are the ladder of human progress.Reading not only broadens my horizons ...Hello!My name is Angel.I am an active girl.I am ten years old.I am in Class 1,Grade 5.I want to share my hobbies.First,I like reading books.Books are the ladder of human progress.Reading not only broadens my horizons but also fills my heart with wonder and inspires me to dream big.展开更多
Designed and built by eight Dutch engineers,the worlds longest bicycle is 55.16 meters,roughly the same length as four double-decker buses.39-year-old Ivan Schalk had been thinking about building the world's longe...Designed and built by eight Dutch engineers,the worlds longest bicycle is 55.16 meters,roughly the same length as four double-decker buses.39-year-old Ivan Schalk had been thinking about building the world's longest bicycle since reading about it in The Guinness Book of Records when he was a child,but he only started this project in 2018,as a way to fill up his free time.展开更多
Hello,everyone.I'm a girl of 14 years old.I have wonderful weekends・On Saturday morning,I usually get up at half past six and then I run with my sister.We both like jogging.At about eight o'clock,I have breakf...Hello,everyone.I'm a girl of 14 years old.I have wonderful weekends・On Saturday morning,I usually get up at half past six and then I run with my sister.We both like jogging.At about eight o'clock,I have breakfast.After that,I do my homework.In the afternoon,I go to the library with my best friend,Li Jing,to borrow some science books.Reading is my favorite.展开更多
The Han-shan and Shi-de story,which spread to Japan around the 11th century,has given rise to many literary works in later times.The Japanese picture book Kanzan and Jittoku by Nagamatsu Yōko and Komai Keiko is a goo...The Han-shan and Shi-de story,which spread to Japan around the 11th century,has given rise to many literary works in later times.The Japanese picture book Kanzan and Jittoku by Nagamatsu Yōko and Komai Keiko is a good example.However,the picture book,which serves as a window on the cultural resonance of the Han-shan and Shi-de story,has not received enough attention from researchers,compared with other forms of rewriting such as poetry,drama,or short stories.This article investigates the representation of Han-shan and Shi-de in the picture book,and examines how the authors have incorporated the preceding texts as raw material for their own.It is found that the transformation of Han-shan and Shi-de in the picture book stems from the authors’selective use of the preceding texts and their unique interpretation.LüQiuyin’s preface,Hakuin’s comments on Han-shan,as well as the authors’knowledge and experience are vital in shaping the characters.展开更多
1 When we immerse ourselves in the pages of a book,we are transported to worlds beyond our own,gaining insights into the human experience and expanding our understanding of ourselves and others.2 Reading can fill our ...1 When we immerse ourselves in the pages of a book,we are transported to worlds beyond our own,gaining insights into the human experience and expanding our understanding of ourselves and others.2 Reading can fill our lives and purify our souls.I enjoy reading and I love life.I enjoy reading Chinese classics such as the Four Great Classical Novels of Chinese literature.I explore the mythical and wonderful stories of demons and monsters in Journey to the West and experience the boldness of martial art heroes in Water Margin.展开更多
文摘In this paper, a mathematical model about the optimal booking level problem in airline overbooking rnanageanent is proposed. Firstly, the normal distribution is employed to approximate Poisson requests and binomial goshows. By calculating the mean loss, a model to describe the relationship between booking level and flight revenue is established. Then, an equation is deduced to decide the optimal booking level. Finally, a numerical example is utilized to illustrate the proposed model and discuss the impact of refund rate on the optimal booking level and the mean loss.
文摘<span style="font-family:Verdana;">With the rise of population and the industrial revolution, it is obvious that hotels and resorts are increasing drastically day by day. In the 21st century, tourism is a trend. Everyone loves to travel and the reasons vary from person to person. Whether it is to have a cheerful and peaceful mind and place or business purposes, either way, hotels and resorts actually doing their jobs very well. This, tourism is a promising sector for any country and Bangladesh is no different. But the problem is we have to do the hotel booking and reservation manually most of the time. Sometimes it is too troublesome and knowing about the suitable hotels and resorts is too difficult. Though there are some online platforms available, they are not our country-oriented such as the payment system is not preferable for us. To solve this problem Vhromon is developed, a comparison-based hotel and resort booking system where anyone can book a hotel or resort by just login from the internet. Vhromon is an interactive online platform and it is user-friendly and easy to get like most of the platforms available nowadays. But they do not have all the hotels and resorts enlisted, only the well-known ones. On the other hand, Vhromon has everything enlisted where customers can compare them and can choose the right one for them. Furthermore, this system has a vendor panel where any hotel or resort owner can add their hotel or resort easily without any hassle, unlike the existing one.</span>
文摘Asymptomatic bacteriuria is common in pregnant women and if untreated could lead to serious complications. Despite this, its prevalence and microbiological characteristics have not been well studied in Kano and they vary among different populations. The objective of the study was to determine the prevalence, microbiological characteristics and pregnancy outcome of asymptomatic bacteriuria in pregnancy among women who came for antenatal booking clinic at the Aminu Kano Teaching Hospital (AKTH) Kano. A cross sectional descriptive study was conducted among randomly selected 200 consenting pregnant women who came for antenatal booking from November 2010 to January 2011. Samples of 10 - 15 mls urine were examined for pus cells and bacteria and then cultured on cysteine lactose electrolyte deficient agar. Colony counts yielding bacterial growth of 105/ml or more of pure isolates were deemed significant. Isolates were identified to specie level. Antibiotic sensitivity test was done, treatment was given and pregnancy outcome was determined. Urinalysis and Full Blood Count were done. The prevalence of asymptomatic bacteriuria in pregnancy was 9%. Parity and Pyuria had statistically significant association with asymptomatic bacteriuria (P < 0.05). The commonest organisms isolated wereKlebsiella?spp. and?Staphylococcus saprophyticus. Following treatment of asymptomatic bacteriuria, there was no statistically significant difference in pregnancy outcome compared to patients who did not have the condition. The incidence of asymptomatic bacteriuria in pregnancy in AKTH is low. Screening of pregnant women using urine microscopy culture and sensitivity should be reserved for pregnant women with higher risk of developing asymptomatic bacteriuria.
文摘Background: Placenta praevia accounts for significant maternal morbidity and perinatal morbidity and mortality. Despite advances in blood transfusion technique and surgical procedure, abnormal placentation still remains a difficult challenge for obstetricians. Objective: To determine the influence of booking status on the fetal and maternal outcome among parturients with placenta praevia that underwent caesarian delivery. Methodology: This was a comparative and retrospective study between booked and unbooked subjects with significant placenta praevia that were delivered by caesarian section between January 1<sup>st</sup> 2004 and December 31<sup>st</sup> 2008 with respect to maternal and fetal outcome. Result: Out of 14,344 deliveries during study period, 123 cases of placenta praevia that underwent caesarian delivery were identified giving a prevalence rate of 0.86%. 49 subjects were booked while 74 were unbooked. There was no statistically significant difference between booked and unbooked cases with respect to risk factors (30.6% of booked and 23% of unbooked), X<sup>2</sup>(4) = 7.203, P = 0.126 and the mean blood loss at surgery (870.4 ± 486.9 ml in booked versus 779.7 ± 380.96 ml in unbooked), X<sup>2</sup>(1) = 0.202, P = 0.653. However, antepartum transfusion (12.2% booked versus 34.7% unbooked) and postpartum transfusion (51% booked versus 72% unbooked) showed statistically significant difference, X<sup>2</sup>(1) = 9.744, P = 0.002. One maternal death occurred amongst the unbooked cases and none among the booked cases. Statistically significant differences were also noted in the apgar score at 1 minute X<sup>2</sup>(3) = 15.528, P = 0.001 and 5 minutes X<sup>2</sup>(3) = 12.912, P = 0.005 respectively. More babies died in the unbooked group (19) compared to two (2) in the booked mothers. Conclusion: Unbooked status in placenta previa significantly increases the risk for antepartum and postpartum transfusion, is associated with higher mortality, increased preterm delivery, poorer apgar scores and higher perinatal mortality rate.
文摘James Lukudu has been attending school for nine years and, during that time, has never had his own textbook. He shared a single book with five to seven other students. But since the new school term began on September 10, Lukudu has turned the page in his schooling progress. Now in Form 2 at Winyi Secondary School in Eastern Equatoria State of South Sudan, Lukudu is a picture of confidence as he sits with his own textbooks in class. This turnaround has been made possible by the donation of more than 1.3 million textbooks and teacher＇s guidebooks by the Chinese Govern ment to South Sudan.
文摘In recent years,machine learning has emerged as a powerful tool with widespread applications across various domains due to its ability to process and analyze vast amounts of data.This study explores the application of machine learning techniques in predicting hotel booking cancellations using Property Management System(PMS)data.The research involves a comprehensive process,including data cleaning,feature engineering,feature selection,and model development.Feature selection and dimensionality reduction using Principal Component Analysis(PCA)and Lasso regression identified key predictive features,facilitating the rapid creation of neural network models.A diverse set of machine learning and deep learning models,such as Logistic Regression,Decision Tree,Random Forest,XGBoost,Multilayer Perceptron(MLP),Convolutional Neural Network(CNN),Deep Neural Network(DNN),and Long Short-Term Memory(LSTM),were employed.All models achieved accuracies exceeding 80%,with neural networks nearing 100%.These results highlight the efficacy of these models in predicting cancellations across different hotels,revealing consistent cancellation patterns.The study demonstrates the potential of machine learning to optimize hotel management by accurately forecasting booking cancellations,thereby reducing uncertainty and increasing revenue.Future work may focus on exploring more advanced feature engineering techniques and models to further enhance prediction accuracy and generalizability.
文摘ISO releases two standards for tourism ISO 9468:2025,Tourism and related services-Online travel agency(OTA)-Guidelines for online accommodation booking platform services,and ISO 25639-1:2025,Exhibitions and events-Part 1:Vocabulary,were released recently,the development of which were led by China.
文摘Two international standards on tourism,ISO 9468:2025,Tourism and related services-Online travel agency(OTA)-Guidelines for online accommodation booking platform services,and ISO 25639-1:2025,Exhibitions and events-Part 1:Vocabulary,were recently released by ISO,the development of which was led by China.
基金supported by NSFC(Nos.12161141003,11931006)supported by NSFC(Nos.11801520,12171436,12271489)supported by NSFC(No.11601527)。
文摘For k given graphs H_(1),...,H_(k) with k≥2,the k-color Ramsey number R(H_(1),...,H_(k)) represents the minimum integer N with the following property:if the edges of the complete graph K_(N) are colored with k colors,then there exists some i with 1≤i≤k such that K_(N) has a subgraph in color i isomorphic to H_(i).Let C_(m) be a cycle of length m and K_(1,n) a star of order n+1.In this paper,we systematically introduce the latest research progress on star-quadrilateral Ramsey numbers and provide an overview of Ramsey numbers concerning quadrilaterals,including multicolor cases.
文摘Todo Mongolian ancient books are widely scattered among people,and many scholars have made ef⁃forts to collect and organize Todo Mongolian ancient books.Mr.Batu is one of the outstanding representa⁃tives.The ancient books and related materials,notes,and other materials Todo Mongolian script he col⁃lected in are rich in content and have extremely high research value.They can provide valuable firsthand information for the academic community and promote in-depth research on the Tote Mongolian lan⁃guage.It is necessary to photocopy and publish them.
文摘Iince rising to fame in 1987 on the television drama Sunshine After Rain,Singaporean artist Edmund Chen has starred in many films and TV series.He has also been active in theatre,hosting programs,and-more recently-publishing.Chen has authored 15 picture books and two art activity books for children,earning recognition as Southeast Asia’s Best Emerging Children’s Author.Today,he remains a prominent figure in public,not just as an actor but also as a writer and illustrator.
文摘Hello!My name is Angel.I am an active girl.I am ten years old.I am in Class 1,Grade 5.I want to share my hobbies.First,I like reading books.Books are the ladder of human progress.Reading not only broadens my horizons but also fills my heart with wonder and inspires me to dream big.
文摘Designed and built by eight Dutch engineers,the worlds longest bicycle is 55.16 meters,roughly the same length as four double-decker buses.39-year-old Ivan Schalk had been thinking about building the world's longest bicycle since reading about it in The Guinness Book of Records when he was a child,but he only started this project in 2018,as a way to fill up his free time.
文摘Hello,everyone.I'm a girl of 14 years old.I have wonderful weekends・On Saturday morning,I usually get up at half past six and then I run with my sister.We both like jogging.At about eight o'clock,I have breakfast.After that,I do my homework.In the afternoon,I go to the library with my best friend,Li Jing,to borrow some science books.Reading is my favorite.
文摘The Han-shan and Shi-de story,which spread to Japan around the 11th century,has given rise to many literary works in later times.The Japanese picture book Kanzan and Jittoku by Nagamatsu Yōko and Komai Keiko is a good example.However,the picture book,which serves as a window on the cultural resonance of the Han-shan and Shi-de story,has not received enough attention from researchers,compared with other forms of rewriting such as poetry,drama,or short stories.This article investigates the representation of Han-shan and Shi-de in the picture book,and examines how the authors have incorporated the preceding texts as raw material for their own.It is found that the transformation of Han-shan and Shi-de in the picture book stems from the authors’selective use of the preceding texts and their unique interpretation.LüQiuyin’s preface,Hakuin’s comments on Han-shan,as well as the authors’knowledge and experience are vital in shaping the characters.
文摘1 When we immerse ourselves in the pages of a book,we are transported to worlds beyond our own,gaining insights into the human experience and expanding our understanding of ourselves and others.2 Reading can fill our lives and purify our souls.I enjoy reading and I love life.I enjoy reading Chinese classics such as the Four Great Classical Novels of Chinese literature.I explore the mythical and wonderful stories of demons and monsters in Journey to the West and experience the boldness of martial art heroes in Water Margin.
