Toxic insects advertise their defended state to potential predators using warning displays. Frequently these displays use cues through more than one sensory modality, and combine color, smell and sound to produce a mu...Toxic insects advertise their defended state to potential predators using warning displays. Frequently these displays use cues through more than one sensory modality, and combine color, smell and sound to produce a multimodal warning display. Signalling through more than one sensory pathway may enhance the rate of avoidance learning, and the memorability of the learned avoidance. A common insect warning odor, pyrazine, has previously been shown to increase the rate of learned avoidance of unpalatable yellow prey by domestic chicks （GaUus gallus domesticus）, and the odor also improved memory of this learned avoidance. However, to date no research has examined this response to pyrazine odor using wild birds under natural conditions. This study used wild robins （Erithacus rubecula） to investigate whether wild birds avoided yellow baits that smelled of pyrazine more strongly than those presented with no odor. The results provide some evidence that pyrazine odor does increase the level of protection an aposematic insect gains from a wild avian predator, but that the effect of pyrazine on learned avoidance was much weaker than was found with domestic chicks .展开更多
This paper attempts to form a bridge between a sum of the divisors function and the gamma function, proposing a novel approach that could have significant implications for classical problems in number theory, specific...This paper attempts to form a bridge between a sum of the divisors function and the gamma function, proposing a novel approach that could have significant implications for classical problems in number theory, specifically the Robin inequality and the Riemann hypothesis. The exploration of using invariant properties of these functions to derive insights into twin primes and sequential primes is a potentially innovative concept that deserves careful consideration by the mathematical community.展开更多
Properties of the gamma function are examined with implications for the Riemann hypothesis. Some new relations are obtained for the roots of the Zeta function using the properties of the Gamma function, the Bernoulli ...Properties of the gamma function are examined with implications for the Riemann hypothesis. Some new relations are obtained for the roots of the Zeta function using the properties of the Gamma function, the Bernoulli function, and limitations imposed by the rational relations of the complex roots of the Riemann zeta function, and the rational relations of the complex Gamma functions.展开更多
Dear Editor,Over the past decades,cooperative control and distributed optimization have gained significant research attention due to their broad applications such as signal processing,robotics,and social networks[1],[...Dear Editor,Over the past decades,cooperative control and distributed optimization have gained significant research attention due to their broad applications such as signal processing,robotics,and social networks[1],[2].As a fundamental component of distributed control and optimization,the issue of average consensus has become a recurring topic of interest[3],[4].展开更多
Pierre Robin综合征(pierre robin syndrome, PRS)是一种相对罕见的疾病。喂养困难是患病婴幼儿最主要的功能障碍,若不及时识别和治疗,会使患儿营养的摄入与需求失衡,影响患儿生长发育,降低其免疫力。本文就PRS患儿喂养困难的界定、影...Pierre Robin综合征(pierre robin syndrome, PRS)是一种相对罕见的疾病。喂养困难是患病婴幼儿最主要的功能障碍,若不及时识别和治疗,会使患儿营养的摄入与需求失衡,影响患儿生长发育,降低其免疫力。本文就PRS患儿喂养困难的界定、影响因素、发生机制及各类管理策略进行综述,为进一步展开研究、改善PRS患儿喂养困难提供借鉴。展开更多
皮罗序列征即Pierre Robin序列征(Pierre Robin sequence,PRS),是一种以小颌畸形、下颌骨后缩和上气道阻塞为特征的疾病,可伴有腭裂。本文报道1例Pierre Robin序列征患儿在根管治疗过程中出现插管困难,插管期间出现一过性血氧饱和度下...皮罗序列征即Pierre Robin序列征(Pierre Robin sequence,PRS),是一种以小颌畸形、下颌骨后缩和上气道阻塞为特征的疾病,可伴有腭裂。本文报道1例Pierre Robin序列征患儿在根管治疗过程中出现插管困难,插管期间出现一过性血氧饱和度下降的处理以及建立人工气道的经验。展开更多
文摘Toxic insects advertise their defended state to potential predators using warning displays. Frequently these displays use cues through more than one sensory modality, and combine color, smell and sound to produce a multimodal warning display. Signalling through more than one sensory pathway may enhance the rate of avoidance learning, and the memorability of the learned avoidance. A common insect warning odor, pyrazine, has previously been shown to increase the rate of learned avoidance of unpalatable yellow prey by domestic chicks （GaUus gallus domesticus）, and the odor also improved memory of this learned avoidance. However, to date no research has examined this response to pyrazine odor using wild birds under natural conditions. This study used wild robins （Erithacus rubecula） to investigate whether wild birds avoided yellow baits that smelled of pyrazine more strongly than those presented with no odor. The results provide some evidence that pyrazine odor does increase the level of protection an aposematic insect gains from a wild avian predator, but that the effect of pyrazine on learned avoidance was much weaker than was found with domestic chicks .
文摘This paper attempts to form a bridge between a sum of the divisors function and the gamma function, proposing a novel approach that could have significant implications for classical problems in number theory, specifically the Robin inequality and the Riemann hypothesis. The exploration of using invariant properties of these functions to derive insights into twin primes and sequential primes is a potentially innovative concept that deserves careful consideration by the mathematical community.
文摘Properties of the gamma function are examined with implications for the Riemann hypothesis. Some new relations are obtained for the roots of the Zeta function using the properties of the Gamma function, the Bernoulli function, and limitations imposed by the rational relations of the complex roots of the Riemann zeta function, and the rational relations of the complex Gamma functions.
基金supported in part by the National Natural Science Foundation of China(62173087)the Fundamental Research Funds for the Central Universitiesthe Alexander von Humboldt Foundation of Germany。
文摘Dear Editor,Over the past decades,cooperative control and distributed optimization have gained significant research attention due to their broad applications such as signal processing,robotics,and social networks[1],[2].As a fundamental component of distributed control and optimization,the issue of average consensus has become a recurring topic of interest[3],[4].
文摘Pierre Robin综合征(pierre robin syndrome, PRS)是一种相对罕见的疾病。喂养困难是患病婴幼儿最主要的功能障碍,若不及时识别和治疗,会使患儿营养的摄入与需求失衡,影响患儿生长发育,降低其免疫力。本文就PRS患儿喂养困难的界定、影响因素、发生机制及各类管理策略进行综述,为进一步展开研究、改善PRS患儿喂养困难提供借鉴。
文摘皮罗序列征即Pierre Robin序列征(Pierre Robin sequence,PRS),是一种以小颌畸形、下颌骨后缩和上气道阻塞为特征的疾病,可伴有腭裂。本文报道1例Pierre Robin序列征患儿在根管治疗过程中出现插管困难,插管期间出现一过性血氧饱和度下降的处理以及建立人工气道的经验。
