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关键词： Tools   Codes   Libraries   Feature extraction   Resilience   Malware   Computer science   Third-party library   android   library detection   empirical study   tool comparisons  

摘要： Third-party libraries (TPLs) have become a significant part of the Android ecosystem. Developers can employ various TPLs to facilitate their app development. Unfortunately, the popularity of TPLs also brings new security issues. For example, TPLs may carry malicious or vulnerable code, which can infect popular apps to pose threats to mobile users. Furthermore, TPL detection is essential for downstream tasks, such as vulnerabilities and malware detection. Thus, various tools have been developed to identify TPLs. However, no existing work has studied these TPL detection tools in detail, and different tools focus on different applications and techniques with performance differences. A comprehensive understanding of these tools will help us make better use of them. To this end, we conduct a comprehensive empirical study to fill the gap by evaluating and comparing all publicly available TPL detection tools based on six criteria: accuracy of TPL construction, effectiveness, efficiency, accuracy of version identification, resiliency to code obfuscation, and ease of use. Besides, we enhance these open-source tools by fixing their limitations, to improve their detection ability. Finally, we build an extensible framework that integrates all existing available TPL detection tools, providing an online service for the research community. We release the evaluation dataset and enhanced tools. According to our study, we also present the essential findings and discuss promising implications to the community;e.g., 1) Most existing TPL detection techniques more or less depend on package structure to construct in-app TPL candidates. However, using package structure as the module decoupling feature is error-prone. We hence suggest future researchers using the class dependency to substitute package structure. 2) Extracted features include richer semantic information (e.g., class dependencies) can achieve better resiliency to code obfuscation. 3) Existing tools usually have a low recall;t

关键词： Blockchains   Bandwidth   Adaptation models   Interoperability   Delays   Computer science   Transfer functions   Blockchains   sidechains   interoperability  

摘要： With the rapid evolution of the blockchain technologies, the interoperability of different blockchain systems is emerging as one of the essential features of blockchains. Sidechains, a mechanism providing communications between different blockchains, have been heralded as the crucial factor of blockchain interoperability. However, there are still issues that need to be addressed in terms of security and feasibility. In this article, for proof-of-stake (PoS) and proof-of-work (PoW) blockchains, we propose efficient sidechain constructions with fast cross-chain transfers and small proof size by novel cross-chain certificate generation process and committee selection methods. Moreover, we also provide an extra functionality of supporting instant cross-chain transfers, such that emergent cross-chain transactions can be processed immediately. Compared to prior sidechains, our PoS sidechain construction can achieve faster cross-chain transfers, which improves the promptness of cross-chain transfers. While our PoW sidechain construction is more efficient with smaller proof size, reducing the storage and bandwidth overhead. Furthermore, we formally prove our sidechain constructions satisfying the properties of atomicity and timeliness. Finally, we develop a proof-of-concept implementation of our sidechains, and the experimental results show our constructions is not only faster, but also efficient with low storage and bandwidth overhead.

关键词： 校企联合培养   专业型硕士   计算机   实践基地   培养质量  

摘要： 现阶段,校企联合培养专业硕士研究生的规模持续扩大,但是校企联合培养模式存在定位差异、实践基地不完善、实践时间不足以及校内外导师协同困难等问题,在很大程度上既影响校企合作的成效,又影响专硕研究生的培养质量。针对上述问题,文章从计算机专硕研究生的培养现状出发,总结了现阶段校企联合培养模式中存在的问题并提出了相应的解决措施。实践证明,文章提出的解决措施有积极的效果。

关键词： 尼西黑陶   汉藏民族   文化交融  

摘要： 尼西黑陶是藏族文化的象征,同时也是尼西乡汤堆村居民生活的必需品,享誉滇西北及全藏区,特殊的地理环境使汤堆村还保留着尼西黑陶最完整的原始制陶工艺技术,当然其自身的发展也处在停滞阶段,款式造型无法跟上现代社会的更新换代的速度,甚至将面临退出现代社会的危机。如何将尼西乡汤堆村本土文化资源保持自身民族特色的同时,让尼西黑陶的技艺传承与创新发展带动地区经济增长。对此笔者提出了理论设想,希望可以对汉藏民族文化交融下对尼西黑陶的发展与传承起到一定的推动作用。

关键词： 互动式护理   乳腺癌   生活质量   癌性疲乏   常规护理  

摘要： 目的分析互动式护理干预对乳腺癌患者术后生活质量与癌性疲乏的影响。方法选取2017年10月至2021年10月巴中市中心医院收治的86例乳腺癌患者作为研究对象,采用随机数字表法将其分为参照组和观察组,每组各43例。参照组采用常规护理,观察组采用互动式护理。比较两组的生活质量、癌性疲乏评分及满意度情况。结果护理前两组生活质量评分及癌性疲乏评分比较,差异无统计学意义(P>0.05)。护理后,观察组生活质量评分高于参照组,观察组癌性疲乏评分低于参照组,差异有统计学意义(P<0.05)。观察组护理满意度高于参照组,差异有统计学意义(P<0.05)。结论在乳腺癌患者的护理中应用互动式护理干预,可以改善患者的生活质量、癌性疲乏评分,同时还可以提高患者的护理满意度,护理效果显著,将这一护理方式和常规护理进行对比可以发现,其更具针对性、有效性和安全性,整体效果更为明显。

关键词： 计算机科学   信息安全   应用体系  

摘要： 阐述计算机科学和技术现代化应用,计算机科学发展中的问题和应对的措施,包括有效提升计算机信息安全性能、建立完整计算机科学与技术现代化应用体系。

摘要： The Map-Based Educational Tools for Algorithm Learning (METAL) project (https://***/metal/) provides a set of graphs based on real-world highway data, and map-based algorithm visualization (AV) tools that use this data. This tutorial will introduce attendees to METAL's data, AV capabilities, and course assignments, all of which have expanded greatly in recent years.

关键词： OBE理念   人才培养模式   改革  

摘要： 成果导向教育(Outcomes-based Education,OBE)理念的关键是以需求为导向、以学生为中心。文章针对计算机科学与技术专业(计算机审计方向)人才培养存在的实践教育缺失、人才培养目标与市场需求存在差距、计算机师资能力有待提高、企业实际实践项目训练机会少等问题,以培养创新应用型人才为目标,引入OBE理念,从明确培养目标、调整课程体系结构、建立校企协同培养模式、构建培养效果评价体系四个方面进行改革,旨在有效提升学生的实践创新能力。

关键词： 体验经济   茶文化旅游   旅游体验   安化黑茶  

摘要： 旅游具有天然的体验性,茶文化旅游体验是茶旅融合发展的重要途径和方向。安化黑茶具有悠久的历史、丰富的内涵、独特的制作技艺及丰富的茶马古道遗存,可深入分析黑茶的体验元素及体验价值,以乡村为基打造茶旅融合新业态,以文化为脉开发茶旅体验新产品,以在地化为魂创建茶旅体验名品牌,以科普为翼设计茶旅体验项目,开展茶事活动、茶产品消费、茶养生休闲、茶科普教育等体验活动,以促进安化茶文化旅游的蓬勃发展。