In the workshop of Guangshan White Shark Card Clothing Co.,Ltd.,precision machines are meticulously crafting the tips of card clothing with millimeter-level accuracy.These seemingly tiny textile accessories play a cru...In the workshop of Guangshan White Shark Card Clothing Co.,Ltd.,precision machines are meticulously crafting the tips of card clothing with millimeter-level accuracy.These seemingly tiny textile accessories play a crucial role in the global cotton and chemical fiber industry chains.As China's textile industry encounters trade barriers in the process of globalization,this company specializing in card clothing manufacturing is striving to explore a differentiated path in overseas markets.展开更多
1 Paddleboarding(桨板运动)should be a relaxing hobby.You can float on the water,listening to the gentle lapping of waves.You can also listen to the call of birds in the air as they fly overhead,searching for food.But ...1 Paddleboarding(桨板运动)should be a relaxing hobby.You can float on the water,listening to the gentle lapping of waves.You can also listen to the call of birds in the air as they fly overhead,searching for food.But when you spot a shark tangled(使缠结)in a fishing line,it can ruin the atmosphere.That's exactly what happened to Charity Clark.She knew she needed to rescue the shark.展开更多
Feature Selection(FS)is an optimization problem that aims to downscale and improve the quality of a dataset by retaining relevant features while excluding redundant ones.It enhances the classification accuracy of a da...Feature Selection(FS)is an optimization problem that aims to downscale and improve the quality of a dataset by retaining relevant features while excluding redundant ones.It enhances the classification accuracy of a dataset and holds a crucial position in the field of data mining.Utilizing metaheuristic algorithms for selecting feature subsets contributes to optimizing the FS problem.The White Shark Optimizer(WSO),as a metaheuristic algorithm,primarily simulates the behavior of great white sharks’sense of hearing and smelling during swimming and hunting.However,it fails to consider their other randomly occurring behaviors,for example,Tail Slapping and Clustered Together behaviors.The Tail Slapping behavior can increase population diversity and improve the global search performance of the algorithm.The Clustered Together behavior includes access to food and mating,which can change the direction of local search and enhance local utilization.It incorporates Tail Slapping and Clustered Together behavior into the original algorithm to propose an Improved White Shark Optimizer(IWSO).The two behaviors and the presented IWSO are tested separately using the CEC2017 benchmark functions,and the test results of IWSO are compared with other metaheuristic algorithms,which proves that IWSO combining the two behaviors has a stronger search capability.Feature selection can be mathematically described as a weighted combination of feature subset size and classification error rate as an optimization model,which is iteratively optimized using discretized IWSO which combines with K-Nearest Neighbor(KNN)on 16 benchmark datasets and the results are compared with 7 metaheuristics.Experimental results show that the IWSO is more capable in selecting feature subsets and improving classification accuracy.展开更多
Shark attacks increased 23% globally within the past 20 years on a multifactorial scale through climate change and human impacts, yet healthcare lacks treatment guidelines for these victims. This systematic review pro...Shark attacks increased 23% globally within the past 20 years on a multifactorial scale through climate change and human impacts, yet healthcare lacks treatment guidelines for these victims. This systematic review proposed a shark attack treatment protocol that will potentially reduce the morbidity and mortality rates by assessing prehospital management with transfusions, hospital management with prophylactic antibiotics, and mental health evaluations to prevent and/or treat psychological impacts. This study screened 463 sources and eliminated 432 sources due to repetition or irrelevance to this study. The protocol initiates with prehospital management by implementing emergency medical service (EMS) to follow the SHARC protocol (systolic blood pressure (SBP) vibrio species. Assessing mental health before and three months after discharge can help prevent and/or treat anxiety, depression, and post-traumatic stress disorder (PTSD).展开更多
随着空间数据的与日俱增,传统依托于单节点的空间数据管理方法,已难以满足海量数据高并发的需求。云计算的兴起带来机遇与挑战,分布式技术与数据库技术的优势互补,为云计算下高效的数据管理提供了可能。本文提出一种在分布式计算引擎(Sh...随着空间数据的与日俱增,传统依托于单节点的空间数据管理方法,已难以满足海量数据高并发的需求。云计算的兴起带来机遇与挑战,分布式技术与数据库技术的优势互补,为云计算下高效的数据管理提供了可能。本文提出一种在分布式计算引擎(Shark/Spark)中集合之关键技术(包括空间数据映射、空间数据加载、数据备份及空间查询等),将空间数据库对空间数据的高效存储、索引及查询优势与分布式计算引擎对复杂计算的优势相结合,实现一种基于Shark/Spark的分布式空间数据分析框架。在具体实现中,通过空间自定义函数和空间函数下推2种方式实现空间查询,结果表明,影响返回结果数据量的空间查询更适合下推给空间数据库完成,而不影响返回结果数据量的空间查询,利用分布式计算引擎直接运算更有优势。同时,通过与现有的一种分布式GIS方案(Arc GIS on Hadoop)对比发现,空间数据库的空间索引可有效提高查询效率,空间数据管理也更加独立。展开更多
This study aimed to develop a predictive model utilizing available data to forecast the risk of future shark attacks, making this critical information accessible for everyday public use. Employing a deep learning/neur...This study aimed to develop a predictive model utilizing available data to forecast the risk of future shark attacks, making this critical information accessible for everyday public use. Employing a deep learning/neural network methodology, the system was designed to produce a binary output that is subsequently classified into categories of low, medium, or high risk. A significant challenge encountered during the study was the identification and procurement of appropriate historical and forecasted marine weather data, which is integral to the model’s accuracy. Despite these challenges, the results of the study were startlingly optimistic, showcasing the model’s ability to predict with impressive accuracy. In conclusion, the developed forecasting tool not only offers promise in its immediate application but also sets a robust precedent for the adoption and adaptation of similar predictive systems in various analogous use cases in the marine environment and beyond.展开更多
Aim To purify hepatocyte regeneration stimulatory factor from shark liver and research its molecular feature and activity. Methods and Results Hepatocyte regeneration stimulatory factor (sHRSF) was isolated from hea...Aim To purify hepatocyte regeneration stimulatory factor from shark liver and research its molecular feature and activity. Methods and Results Hepatocyte regeneration stimulatory factor (sHRSF) was isolated from healthy shark livers and separated by homogenization, freezing melting, heat treating, centrifugation, and ultrafiltration. HRSF activity was found mainly in the subfraction of molecular weight less than 30 000 daltons. This crude ultrafiltrate was further purified successively by DEAE Sepharose fast flow chromatography, FPLC Resource 30Q, Resource Q and Mono Q chromatography. A single band was displayed on sodium dodecyl sulfate polyacrylamide gel electrophoresis, which corresponds to molecular weight of 14 600 daltons. The characteristic absorption was obtained at the wavelength 276 nm. The isoelectric point was about 5 1. It contained 18 amino acids and the 15 N terminal amino acid residues were LVGPIGAVGPAGKDG. It had a significant activity in stimulating liver to regenerate. Conclusion We obtained an unknown new active protein, that is hepatocyte regeneration stimulatory factor from shark liver (sHRSF).展开更多
Five unprovoked shark attacks are reported from Sharm-El-Sheikh, Egypt, between 30 November and 5 December 2010. Three of the five attacks are attributed to an oceanic whitetip shark, Carcharinus longimanus with a dis...Five unprovoked shark attacks are reported from Sharm-El-Sheikh, Egypt, between 30 November and 5 December 2010. Three of the five attacks are attributed to an oceanic whitetip shark, Carcharinus longimanus with a distinctive crescent-shaped notch in the upper lobe of the caudal fin. The shark was observed during the first attack on a snorkeler and photographed underwater during the second shark attack on a swimmer. In a video taken several months prior to the attacks, the same shark is hand-fed underwater by a divemaster with additional fish in a pack over his buttock. The shark can be seen swimming behind the divemaster while he removed additional fish from this pack. In Victims 1, 2 and 5, the shark removed an extensive amount of tissue from the victims’ buttock. The three victims also lost a hand and/or a portion of their forearm, suggesting the injuries were inflicted by a shark conditioned to associating food with hand-feedings and the human form. The remaining two attacks, Cases 3 and 4, were attributable to the shortfin mako shark, Isurus oxyrinchus. This was determined from a unique dental pattern of the right side of the upper jaw due to a prior injury. This same “misalignment” dental pattern was observed in the injuries sustained by Victims 3 and 4. We conclude that the shortfin mako shark was responsible for the attacks on Victims 3 and 4, and the oceanic whitetip shark was the causal species of attacks on Victims 1, 2, and 5.展开更多
文摘In the workshop of Guangshan White Shark Card Clothing Co.,Ltd.,precision machines are meticulously crafting the tips of card clothing with millimeter-level accuracy.These seemingly tiny textile accessories play a crucial role in the global cotton and chemical fiber industry chains.As China's textile industry encounters trade barriers in the process of globalization,this company specializing in card clothing manufacturing is striving to explore a differentiated path in overseas markets.
文摘1 Paddleboarding(桨板运动)should be a relaxing hobby.You can float on the water,listening to the gentle lapping of waves.You can also listen to the call of birds in the air as they fly overhead,searching for food.But when you spot a shark tangled(使缠结)in a fishing line,it can ruin the atmosphere.That's exactly what happened to Charity Clark.She knew she needed to rescue the shark.
基金supported in part by the Basic Research Program of the Educational Department of Liaoning Province(Grant No.JYTMS20230802)the Natural Science Foundation of Liaoning Province(Grant No.2023-MS-317)the China Postdoctoral Science Foundation(Grant No.2021M701537).
文摘Feature Selection(FS)is an optimization problem that aims to downscale and improve the quality of a dataset by retaining relevant features while excluding redundant ones.It enhances the classification accuracy of a dataset and holds a crucial position in the field of data mining.Utilizing metaheuristic algorithms for selecting feature subsets contributes to optimizing the FS problem.The White Shark Optimizer(WSO),as a metaheuristic algorithm,primarily simulates the behavior of great white sharks’sense of hearing and smelling during swimming and hunting.However,it fails to consider their other randomly occurring behaviors,for example,Tail Slapping and Clustered Together behaviors.The Tail Slapping behavior can increase population diversity and improve the global search performance of the algorithm.The Clustered Together behavior includes access to food and mating,which can change the direction of local search and enhance local utilization.It incorporates Tail Slapping and Clustered Together behavior into the original algorithm to propose an Improved White Shark Optimizer(IWSO).The two behaviors and the presented IWSO are tested separately using the CEC2017 benchmark functions,and the test results of IWSO are compared with other metaheuristic algorithms,which proves that IWSO combining the two behaviors has a stronger search capability.Feature selection can be mathematically described as a weighted combination of feature subset size and classification error rate as an optimization model,which is iteratively optimized using discretized IWSO which combines with K-Nearest Neighbor(KNN)on 16 benchmark datasets and the results are compared with 7 metaheuristics.Experimental results show that the IWSO is more capable in selecting feature subsets and improving classification accuracy.
文摘Shark attacks increased 23% globally within the past 20 years on a multifactorial scale through climate change and human impacts, yet healthcare lacks treatment guidelines for these victims. This systematic review proposed a shark attack treatment protocol that will potentially reduce the morbidity and mortality rates by assessing prehospital management with transfusions, hospital management with prophylactic antibiotics, and mental health evaluations to prevent and/or treat psychological impacts. This study screened 463 sources and eliminated 432 sources due to repetition or irrelevance to this study. The protocol initiates with prehospital management by implementing emergency medical service (EMS) to follow the SHARC protocol (systolic blood pressure (SBP) vibrio species. Assessing mental health before and three months after discharge can help prevent and/or treat anxiety, depression, and post-traumatic stress disorder (PTSD).
文摘随着空间数据的与日俱增,传统依托于单节点的空间数据管理方法,已难以满足海量数据高并发的需求。云计算的兴起带来机遇与挑战,分布式技术与数据库技术的优势互补,为云计算下高效的数据管理提供了可能。本文提出一种在分布式计算引擎(Shark/Spark)中集合之关键技术(包括空间数据映射、空间数据加载、数据备份及空间查询等),将空间数据库对空间数据的高效存储、索引及查询优势与分布式计算引擎对复杂计算的优势相结合,实现一种基于Shark/Spark的分布式空间数据分析框架。在具体实现中,通过空间自定义函数和空间函数下推2种方式实现空间查询,结果表明,影响返回结果数据量的空间查询更适合下推给空间数据库完成,而不影响返回结果数据量的空间查询,利用分布式计算引擎直接运算更有优势。同时,通过与现有的一种分布式GIS方案(Arc GIS on Hadoop)对比发现,空间数据库的空间索引可有效提高查询效率,空间数据管理也更加独立。
文摘This study aimed to develop a predictive model utilizing available data to forecast the risk of future shark attacks, making this critical information accessible for everyday public use. Employing a deep learning/neural network methodology, the system was designed to produce a binary output that is subsequently classified into categories of low, medium, or high risk. A significant challenge encountered during the study was the identification and procurement of appropriate historical and forecasted marine weather data, which is integral to the model’s accuracy. Despite these challenges, the results of the study were startlingly optimistic, showcasing the model’s ability to predict with impressive accuracy. In conclusion, the developed forecasting tool not only offers promise in its immediate application but also sets a robust precedent for the adoption and adaptation of similar predictive systems in various analogous use cases in the marine environment and beyond.
基金NationalMarine863Project (No .2 0 0 1AA62 40 90),NationalNaturalScienceFoundationofChina (No .3 0 17110 3 )
文摘Aim To purify hepatocyte regeneration stimulatory factor from shark liver and research its molecular feature and activity. Methods and Results Hepatocyte regeneration stimulatory factor (sHRSF) was isolated from healthy shark livers and separated by homogenization, freezing melting, heat treating, centrifugation, and ultrafiltration. HRSF activity was found mainly in the subfraction of molecular weight less than 30 000 daltons. This crude ultrafiltrate was further purified successively by DEAE Sepharose fast flow chromatography, FPLC Resource 30Q, Resource Q and Mono Q chromatography. A single band was displayed on sodium dodecyl sulfate polyacrylamide gel electrophoresis, which corresponds to molecular weight of 14 600 daltons. The characteristic absorption was obtained at the wavelength 276 nm. The isoelectric point was about 5 1. It contained 18 amino acids and the 15 N terminal amino acid residues were LVGPIGAVGPAGKDG. It had a significant activity in stimulating liver to regenerate. Conclusion We obtained an unknown new active protein, that is hepatocyte regeneration stimulatory factor from shark liver (sHRSF).
文摘Five unprovoked shark attacks are reported from Sharm-El-Sheikh, Egypt, between 30 November and 5 December 2010. Three of the five attacks are attributed to an oceanic whitetip shark, Carcharinus longimanus with a distinctive crescent-shaped notch in the upper lobe of the caudal fin. The shark was observed during the first attack on a snorkeler and photographed underwater during the second shark attack on a swimmer. In a video taken several months prior to the attacks, the same shark is hand-fed underwater by a divemaster with additional fish in a pack over his buttock. The shark can be seen swimming behind the divemaster while he removed additional fish from this pack. In Victims 1, 2 and 5, the shark removed an extensive amount of tissue from the victims’ buttock. The three victims also lost a hand and/or a portion of their forearm, suggesting the injuries were inflicted by a shark conditioned to associating food with hand-feedings and the human form. The remaining two attacks, Cases 3 and 4, were attributable to the shortfin mako shark, Isurus oxyrinchus. This was determined from a unique dental pattern of the right side of the upper jaw due to a prior injury. This same “misalignment” dental pattern was observed in the injuries sustained by Victims 3 and 4. We conclude that the shortfin mako shark was responsible for the attacks on Victims 3 and 4, and the oceanic whitetip shark was the causal species of attacks on Victims 1, 2, and 5.
