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汽车与运动 2011年第4期 28-31页

作者：李晓非 aston MARTIN

“老兵不死,只是隐去”这句话在车坛也同样适用，阿斯顿·马丁就在十年之后重启了Virage这个名字。

关键词：阿斯顿·马丁跑车性能产品介绍

aston MARTIN VI2 ZAGATO 优雅的赛道杀手

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汽车与运动 2011年第8期 20-23页

作者：李晓非 aston Martin 不详

让这样一辆堪称艺术品的车型去参加赛事有点暴殄天物,但这就是阿斯顿·马丁的品牌精神所在。

关键词：赛道优雅艺术品

Modeling the Social Reinforcement of Misinformation Dissemination on Social Media

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Journal of Behavioral and Brain Science 2022年第11期12卷 533-547页

作者： Ashleigh T. aston Ink Bowl Publishing New York NY USA

Despite the salience of misinformation and its consequences, there still lies a tremendous gap in research on the broader tendencies in collective cognition that compels individuals to spread misinformation so excessively. This study examined social learning as an antecedent of engaging with misinformation online. Using data released by Twitter for academic research in 2018, Tweets that included URL news links of both known misinformation and reliable domains were analyzed. Lindström’s computational reinforcement learning model was adapted as an expression of social learning, where a Twitter user’s posting frequency of news links is dependent on the relative engagement they receive in consequence. The research found that those who shared misinformation were highly sensitive to social reward. Inflation of positive social feedback was associated with a decrease in posting latency, indicating that users that posted misinformation were strongly influenced by social learning. However, the posting frequency of authentic news sharers remained fixed, even after receiving an increase in relative and absolute engagement. The results identified social learning is a contributor to the spread of misinformation online. In addition, behavior driven by social validation suggests a positive correlation between posting frequency, gratification received from posting, and a growing mental health dependency on social media. Developing interventions for spreading misinformation online may profit by assessing which online environments amplify social learning, particularly the conditions under which misinformation proliferates.

关键词： Social Reinforcement Learning Misinformation Online Computational Models of Cognition

Community Detection in Dynamic Social Networks

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Communications and Network 2014年第2期6卷 124-136页

作者： Nathan aston Wei Hu Department of Computer Science Houghton College Houghton USA

There are many community detection algorithms for discovering communities in networks, but very few deal with networks that change structure. The SCAN (Structural Clustering Algorithm for Networks) algorithm is one of these algorithms that detect communities in static networks. To make SCAN more effective for the dynamic social networks that are continually changing their structure, we propose the algorithm DSCAN (Dynamic SCAN) which improves SCAN to allow it to update a local structure in less time than it would to run SCAN on the entire network. We also improve SCAN by removing the need for parameter tuning. DSCAN, tested on real world dynamic networks, performs faster and comparably to SCAN from one timestamp to another, relative to the size of the change. We also devised an approach to genetic algorithms for detecting communities in dynamic social networks, which performs well in speed and modularity.

关键词： Community Detection Dynamic Social Networks Density Genetic Algorithms

Cocaine treatment followed by prolonged withdrawal disrupts mPFC inputs to VTA

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Cocaine treatment followed by prolonged withdrawal disrupts ...

Twitter Sentiment in Data Streams with Perceptron

中国神经科学学会第四次会员代表大会暨第八届全国学术会议

作者： aston-Jones GARY Medical University of South Carolina Charleston29425USA

＜正＞Objective The medial prefrontal cortex（mPFC） inputs to the ventral tegmental area（VTA） are important to the function of the dopamine（DA） system,influencing its role in reward and drug *** Using in vivo extracellular single-unit recording,we investigated the effects of repeated cocaine treatment followed by protracted withdrawal（2- 4 weeks） on the responsiveness of VTA DA neurons to electrical stimulation of *** We found that VTA DA neurons in cocaine- and saline-treated animals exhibited a similar firing rate before,during and after the ventral mPFC electric ***,2-4 week abstinence decreased bursting during the baseline（%of spikes firing in burst （%SIB）:abstinent rats vs saline rats:29.47±5.34 vs 40.16±4.67,P＜0.05）.Additionally,the change in%SIB during ventral mPFC stimulation showed significant differences between cocaine abstinent rats and saline-pretreated rats（abstinent rats vs saline rats:7.5±0.7 vs -7.7±0.9,P＜0.01）.Furthermore,the proportion of VTA dopamine neurons exhibiting short latency mPFC-evoked excitations（＜ 25 ms） was higher in saline-treated animals than cocaine abstinent rats（47.1%vs15.0%）.In contrast to saline-treated animals,cocaine treated rats exhibited longer long-onset latency activation on average（abstinent rats vs saline rats:315±48 ms vs 132±11ms,P＜0.05）.Finally,this decrease in frequency of short-latency evoked excitations was replicated in animals that had undergone 10 days of cocaine self-administration（2/22 DA neurons） or 10 days cocaine self-administration followed by two-week abstinence（1/18 DA neurons）.Conclusion The results of this study provide the evidence that repeated cocaine treatment,as well as cocaine treatment followed by prolonged withdrawal,disrupts mPFC inputs to *** data suggest that extensive cocaine exposure may influence cognitive control over reward seeking, potentially providing a mechanism for increased drug-seeking during withdrawal and relapse states.

关键词： cocaine prolonged withdrawal extracellular single-unit recording mPFC inputs to VTA dopamine neurons

来源： cnki会议评论

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Journal of Computer and Communications 2014年第3期2卷 11-16页

作者： Nathan aston Jacob Liddle Wei Hu Department of Computer Science Houghton College Houghton USA

With the huge increase in popularity of Twitter in recent years, the ability to draw information regarding public sentiment from Twitter data has become an area of immense interest. Numerous methods of determining the sentiment of tweets, both in general and in regard to a specific topic, have been developed, however most of these functions are in a batch learning environment where instances may be passed over multiple times. Since Twitter data in real world situations are far similar to a stream environment, we proposed several algorithms which classify the sentiment of tweets in a data stream. We were able to determine whether a tweet was subjective or objective with an error rate as low as 0.24 and an F-score as high as 0.85. For the determination of positive or negative sentiment in subjective tweets, an error rate as low as 0.23 and an F-score as high as 0.78 were achieved.

关键词： Sentiment Analysis Twitter Grams Perceptron Data Stream

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675LT v P1

汽车与运动 2018年第2期 60-67页

作者： DAN PROSSER aston PARROTT DEAN SMITH

几乎相同的性能,价格却差了十万八千里——675LT是否真的特别到足以让P1这样一款令人神经错乱的顶级跑车感到焦虑呢？那还是我们的＂2015年度车型＂评选的时候,已经是最后一天了,我们到了苏格兰,因为是英国的最北端,让人感觉是个无法的... 详细信息

几乎相同的性能,价格却差了十万八千里——675LT是否真的特别到足以让P1这样一款令人神经错乱的顶级跑车感到焦虑呢？那还是我们的＂2015年度车型＂评选的时候,已经是最后一天了,我们到了苏格兰,因为是英国的最北端,让人感觉是个无法的地方,再往北恐怕就要无天了。幸好老天还存在,在它的眷顾之下过去的三天一直是阳光明媚,但今天上午浓雾遮挡了周围的景物,拍摄的计划是告吹了。好在贴近地面的高度上能见度还不错,也就是说在路上驾车还是没问题的。

关键词：赛车车型品牌汽车运动

Lotus Elise Sprint 220

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汽车与运动 2017年第9期 44-46页

作者： John Barker aston Parrott 卫东

测试地点：英格兰已经从Elise Sport上减轻了26kg,并且值得庆幸的是又拾起了著名的Sprint名牌。但这些值得你花费更多的费用吗？当一辆路特斯穿戴起Sprint的名牌时一定是相当特殊,如果你走近Elise Sprint就将会感受到这一切,尤其当你看... 详细信息

测试地点：英格兰已经从Elise Sport上减轻了26kg,并且值得庆幸的是又拾起了著名的Sprint名牌。但这些值得你花费更多的费用吗？当一辆路特斯穿戴起Sprint的名牌时一定是相当特殊,如果你走近Elise Sprint就将会感受到这一切,尤其当你看到给人印象深刻的带有高贵品质、散发着有序光泽的碳纤维面板时。带有通风孔的发动机舱盖板完全是轻量化材料。打开车门,你会发现敞开换挡机构的换挡杆和收音机都在它们应该在的位置上。它看起来像全面采取了轻量化节能方案,也确实是这样。

关键词：轿车车型品牌发动机

To scope or not-the challenges of managing patients with positive fecal occult blood test after recent colonoscopy

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World Journal of Gastrointestinal Oncology 2022年第9期14卷 1798-1807页

作者： Nivedita Rattan Laura Willmann Diana aston Shani George Milan Bassan David Abi-Hanna Sulakchanan Anandabaskaran George Ermerak Watson Ng Jenn Hian Koo Gastroenterology and Liver Services Liverpool HospitalLiverpool 2170New South WalesAustralia Faculty of Medicine University of New South WalesSydney 2052New South WalesAustralia

BACKGROUND Colorectal cancer(CRC) is a major health problem. There is minimal consensus of the appropriate approach to manage patients with positive immunochemical fecal occult blood test(iFOBT), following a recent *** To determine the prevalence of advanced neoplasia in patients with a positive iFOBT after a recent colonoscopy, and clinical and endoscopic predictors for advanced *** The study recruited i FOBT positive patients who underwent colonoscopy between July 2015 to March 2020. Data collected included demographics, clinical characteristics, previous and current colonoscopy findings. Primary outcome was the prevalence of CRC and advanced neoplasia in a patient with positive iFOBT and previous colonoscopy. Secondary outcomes included identifying any clinical and endoscopic predictors for advanced *** The study included 1051 patients(male 53.6%;median age 63). Forty-two(4.0%) patients were diagnosed with CRC, 513(48.8%) with adenoma/sessile serrated lesion(A-SSL) and 257(24.5%) with advanced A-SSL(AA-SSL). A previous colonoscopy had been performed in 319(30.3%). In this cohort, four(1.3%) were diagnosed with CRC, 146(45.8%) with A-SSL and 56(17.6%) with AA-SSL. Among those who had a colonoscopy within 4 years, none had CRC and 7 had AA-SSL. Of the 732 patients with no prior colonoscopy, there were 38 CRCs(5.2%). Independent predictors for advanced neoplasia were male [odds ratio(OR) = 1.80;95% confidence interval(CI): 1.35-2.40;P < 0.001), age(OR = 1.04;95%CI: 1.02-1.06;P < 0.001) and no previous colonoscopy(OR = 2.07;95%CI: 1.49-2.87;P < 0.001).CONCLUSION A previous colonoscopy, irrespective of its result, was associated with low prevalence of advanced neoplasia, and if performed within four years of a positive iFOBT result, was protective against CRC.

关键词： Colorectal cancer Adenoma Screening Fecal occult blood test Colonoscopy

Overlapping Community Detection in Dynamic Networks

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Journal of Software Engineering and Applications 2014年第10期7卷 872-882页

作者： Nathan aston Jacob Hertzler Wei Hu Department of Computer Science Houghton College Houghton USA

Due to the increasingly large size and changing nature of social networks, algorithms for dynamic networks have become an important part of modern day community detection. In this paper, we use a well-known static community detection algorithm and modify it to discover communities in dynamic networks. We have developed a dynamic community detection algorithm based on Speaker-Listener Label Propagation Algorithm (SLPA) called SLPA Dynamic (SLPAD). This algorithm, tested on two real dynamic networks, cuts down on the time that it would take SLPA to run, as well as produces similar, and in some cases better, communities. We compared SLPAD to SLPA, LabelRankT, and another algorithm we developed, Dynamic Structural Clustering Algorithm for Networks Overlapping (DSCAN-O), to further test its validity and ability to detect overlapping communities when compared to other community detection algorithms. SLPAD proves to be faster than all of these algorithms, as well as produces communities with just as high modularity for each network.

关键词： Community Detection Modularity Dynamic Networks Overlapping Community Detection Label Propagation