Modeling and Analyzing Web Application with Aspect-Oriented Hierarchical Coloured Petri Nets

Aspect-oriented modeling can uncover potential design faults, yet most existing work fails to achieve both separation and composition in a natural and succinct way. This study presents an aspect-oriented modeling and analysis approach with hierarchical Coloured Petri Nets(HCPN). HCPN has sub-models and well-defined semantics combining a set of submodels. These two characteristics of HCPN are nicely integrated into aspect oriented modeling. Submodels are used to model aspects while the combination mechanism contributes to aspects weaving. Furthermore, the woven aspect oriented HCPN model can be simulated and analyzed by the CPN Tools. A systematic web application case study is conducted. The results show the system original properties are satisfied after weaving aspects and all design flaws are revealed. As such, the approach can support web application design and analysis in an aspect-oriented fashion concisely and effectively.

Landslides and Slope Aspect in the Three Gorges Reservoir Area Based on GIS and Information Value Model

Slope aspect is one of the indispensable internal factors besides lithology, relative elevation and slope degree. In this paper authors use information value model with Geo graphical Information System （GIS） technology to study how slope aspect contributes to landslide growth from Yunyang to Wushan segment in the Three Gorges Reservoir area, and the relationship between aspect and landslide growth is quantified. Through the research on 205 landslides examples, it is found that the slope contributes most whose aspect is towards south,southeast and southwest aspect contribute moderately, and other five aspects contribute little. The research result inosculates preferably with the fact. The result of this paper can provide potent gist to the construction of Three Gorges Reservoir area in future.

An Aspect-Oriented Approach for Use Case Based Modeling of Software Product Lines

Software Product Line Development advocates software reuse by modeling common and variable artefacts separately across members of a family of products. Aspect-Oriented Software Development aims at separation of concerns with “aspects” to increase modularity, reusability, maintainability and ease of evolution. In this paper, we apply an as-pect-oriented use case modeling approach to product line system modeling. A use case specification captures stake-holders concerns as interactions between a system and its actors. We adapt our previous work with the introduction of a “variability” relationship for the expression of variabilities. This relationship is used to model variable and common behaviours across a family of products as use cases. A variability composition mechanism enables building of executa-ble behaviour models for each member of a product line family by integrating common elements with the applicable variable elements.

Using UML Behavioral Model to Support Aspect Oriented Model

Aspect oriented software development is an emerging paradigm of software development. The notion of this technique is separation of concerns which means to implement each concern in a single object in object oriented programming but still there are concerns which are distributed on different objects and are called crosscutting concerns while another form is Core concerns are the core functionality provided by the system but crosscutting concerns are the concerns like logging, performance etc. Modeling of aspect oriented software is different from the normal modeling of object-oriented or procedural language software, because aspects don’t have the independent identity or existence and they are tightly coupled to their woven context so it is difficult to model them. The one aim of our research paper is to explore the domain of Modeling of the aspect-oriented software. The goal of this research paper is to give a UML Behavioral modeling techniques in the domain of aspect oriented software development. This technique of generating UML Behavioral Model for aspects will give better understating of separations concerns.

Some Physical Aspects of Summer Monsoon Clouds-Comparison of Cloud Model Results with Observations

The physical characteristics of the summer monsoon clouds were investigated. The results of a simple cloud model were compared with the aircraft cloud physical observations collected during the summer monsoon seasons of 1973, 1974, 1976 and 1981 in the Deccan Plateau region.The model predicted profiles of cloud liquid water content (LWC) are in agreement with the observed profiles. There is reasonable agreement between the model predicted cloud vertical thickness and observed rainfall.The observed cloud-drop spectra were found to be narrow and the concentration of drops with diameter > 20um is either low or absent on many occasions. In such clouds the rain-formation cannot take place under natural atmospheric conditions due to the absence of collision-coalescence process. A comparison of the model predicted and observed rainfall suggested that the precipitation efficiency in cumulus clouds of small vertical thickness could be as low as 20 per cent.The clouds forming in the Deccan Plateau region during the summer monsoon are, by and large, cumulus and strato-cumulus type. The vertical thickness of the cumulus clouds is in the range of 1.0-2.0 km. The LWC is found to be more in the region between 1.6-1.9 km A. S. L. , which corresponds to the level at almost 3 / 4 th of the total vertical thickness of the cloud and thereafter the LWC sharply decreased. Nearly 98 per cent of the tops of the low clouds in the region are below freezing level and the most frequent range of occurrence of these cloud-tops is in the range of 2.0-3.0 km A. S. L. The dominant physical mechanism of rain-formation in these summer monsoon clouds is the collision-coalescence process.

An Embedded Software Modeling and Process by Using Aspect-Oriented Approach

In recent years, mobile devices have become widespread and refined, and they have offered increased convenience in human life. For these reasons, a variety of embedded systems have been designed. Therefore, improving methods for developing of embedded software systematically has become an important issue. Platform-based design is one example of an embedded-system design method that can reduce the design cost via improving a design’s abstraction level. However, platform-based design lacks precise definitions for platforms and design processes. This paper provides an approach that combines the aspects and platform-based design methods for developing embedded software. The approach is built on platform-based design methodology and uses the separating of concerns (SoC) concept to define the aspects and to reduce the crosscutting concerns in embedded system modeling. For aspect issues, we use the extended UML notation with aspects to describe both the static structure and the dynamic structure of the embedded system. We used an example of a digital photo frame system to demonstrate our approach.

Integration of aspect and slope in snowmelt runoff modeling in a mountain watershed

This study assessed the performances of the traditional temperature-index snowmelt runoff model(SRM) and an SRM model with a finer zonation based on aspect and slope(SRM + AS model) in a data-scarce mountain watershed in the Urumqi River Basin,in Northwest China.The proposed SRM + AS model was used to estimate the melt rate with the degree-day factor(DDF) through the division of watershed elevation zones based on aspect and slope.The simulation results of the SRM + AS model were compared with those of the traditional SRM model to identify the improvements of the SRM + AS model's performance with consideration of topographic features of the watershed.The results show that the performance of the SRM + AS model has improved slightly compared to that of the SRM model.The coefficients of determination increased from 0.73,0.69,and 0.79 with the SRM model to 0.76,0.76,and 0.81 with the SRM + AS model during the simulation and validation periods in 2005,2006,and 2007,respectively.The proposed SRM + AS model that considers aspect and slope can improve the accuracy of snowmelt runoff simulation compared to the traditional SRM model in mountain watersheds in arid regions by proper parameterization,careful input data selection,and data preparation.

急性缺血性脑卒中静脉溶栓预后不良预警模型构建

目的:对急性缺血性脑卒中(AIS)静脉溶栓的预后不良影响因素进行分析,构建其不良预警模型为其并发症防治提供依据。方法:收集256例AIS患者,4.5 h内均行静脉溶栓及用药后1 h内进行DWI检查,治疗3个月后按MRS评分结果分为82例预后不良组(>2分)和174例预后良好组(≤2分),采用Logistic回归分析预后不良影响因素,构建其预警模型及使用ROC曲线分析模型预测效能。结果:低DWI-ASPECTS和高NIHSS评分均是预后不良的危险因素(P=0.01)。ROC曲线显示,当NIHSS≥5分、DWI-ASPECTS<8分、NIHSS≥5分且DWI-ASPECTS<8分时,对静脉溶栓预后不良预测灵敏度、特异度、阳性率及阴性率分别为92%、47%、45%、92%,79%、80%、65%、89%,93%、73%、69%、94%,差别有统计学意义(P<0.01)。结论:AIS静脉溶栓预后不良危险因素是高基线NIHSS评分和低基线DWI-ASPECTS评分,联合构建其预后不良预警模型有助于防治静脉溶栓后并发症。

大跨度铁路桥附属构件对不同宽高比矩形断面涡振性能的影响

在已建成的大跨度鳊鱼洲长江大桥原设计宽高比为6.7∶1的四线铁路桥矩形箱型主梁断面的基础上,通过调整断面宽高比,设计宽高比为4∶1的二线铁路和宽高比为9∶1的六线铁路桥矩形箱梁断面。通过节段模型风洞试验,在0°,±3°和±5°风攻角的均匀来流下,对以上3种常用二线、四线和六线铁路桥矩形箱梁断面与对应相同宽高比纯矩形断面之间的涡振特性关系,以及铁路桥附属构件对不同宽高比矩形断面涡振性能的影响进行研究。结果表明:在宽高比分别为4∶1和6.7∶1的矩形断面上布置铁路桥附属构件能增大断面在负风攻角下的涡振振幅,在-5°风攻角下竖向涡振振幅增大率高达277.5%,但对正风攻角下的涡振响应起到一定的抑制作用,而在宽高比为9∶1的矩形断面布置六线铁路桥附属构件则能明显增大该断面在各风攻角下的涡振振幅,其扭转涡振振幅增大率均在48.3%以上;铁路桥附属构件对矩形断面涡振性能的降低作用随着断面宽高比的增大而提升,针对气动外形较钝的二线和四线铁路桥箱梁,可参考相似宽高比矩形断面涡振特性,并重点考察箱梁在负风攻角下的涡振响应,而针对宽高比较大的六线铁路桥箱梁,由于附属构件影响较大,参考相似宽高比矩形断面涡振特性的意义较小,均应详细研究其在各风攻角下的涡振性能。

融合情感增强与句法特征的卷烟消费者评价方面级情感分析

为了解消费者对卷烟产品不同属性的情感信息,帮助烟草企业了解消费者评价及情感倾向,指导产品开发和市场营销决策,该文利用爬虫采集2010—2022年共18205条卷烟消费者评价数据,基于预训练模型(BERT)和双向长短时记忆网络(Bi-LSTM)对文本进行特征提取,结合句法依赖树获取语义间关系,建立融合情感增强和句法特征的方面级情感分类模型BAGCN,将BAGCN模型的分类结果与其他4种方法进行对比。结果显示,BAGCN模型在方面级情感分类效果最优,准确率和F1值达到79.49%和75.26%,BAGCN的各模块对最终的分类效果均有贡献。通过方面级情感分析发现,消费者更关注卷烟产品的价格和口感属性,对价格方面的评价多为消极情感,而口感方面的情感分布较为均衡,消费者对外观和品控方面的评价相对积极。

一种面向方面编程的图示化分析与实现

图示化地展现面向方面编程的组成、技术架构、编程和测试过程,有助于对AOP思想的理解和技术实现的掌握。以多年实际的教学案例实践,结合UML分析建模技术,使用用例图完成功能需求分析,引入AOP切面的建模分析,建立横切关注方面的立体概念;采用组件图完成技术架构图,进而完成了AOP的技术实现和文件结构图,并详细给出了相关切面织入的测试过程图。探索一种图示化的面向方面的分析与实现过程,解决了面向方面编程认知思想和技术实现的难点。在实际教学中,收到一定效果。

“产出导向法”在大学英语课程思政教学中的应用研究

课程思政和“产出导向法”同为具有中国特色的教学理念,具有良好的融合基础。“产出导向法”在大学英语课程思政教学中应用的可行性,可从教学理念的契合性,教学流程的借鉴性和教学内涵的互补性三个方面进行探讨并构建出“三阶三面三目标”的大学英语课程思政教学模式。

多模态方面级情感分析的多视图交互学习网络

以往的多模态方面级情感分析方法只利用预训练模型的一般文本和图片表示,对方面和观点词相关性的识别不敏感,且不能动态获取图片信息对单词表示的贡献,因而不能充分识别多模态与方面之间的相关性。针对上述问题,提出一种多视图交互学习网络模型。将句子从上下文和句法两个视图上分别提取特征,以便在多模态交互时充分利用到文本的全局特征;对文本、图片和方面之间的关系进行建模,使模型实现多模态交互;同时融合不同模态的交互表示,动态获取视觉信息对文本中每个单词的贡献程度,充分提取模态与方面之间的相关性。最后通过全连接层和Softmax层获取情感分类结果。在两个数据集上进行实验,实验结果表明该模型能够有效增强多模态方面级情感分类的效果。

基于主题模型的(Aspect,Rating)摘要生成方法研究

提出基于短语参数学习的主题模型TMPP(Topic Model based on Phrase Parameter)对在线评论中被评价实体的aspect和与之对应的rating进行抽取.TMPP具有三个特点:1)评论用"短语袋"表示;2)将标准的LDA中表示文档-主题的参数扩展为(aspect,rating)集;3)融合了先验知识.介绍了TMPP模型参数的物理含义、模型的生成过程以及先验知识的获取和表示方法;阐述了在TMPP模型中引入方面集聚类使用先验知识的原因与好处、TMPP模型提取(方面,等级)对形成(aspect,rating)摘要的原理.以真实的在线产品评论数据集为实验对象,在实验过程中引入先验知识的方面识别分析和等级预测精度分析,列出了五类产品相关方面和对立的情感词的实验结果.通过与已有的基线方法比较,实验表明若评论集中每篇评论有一个总体等级,TMPP能产生高质量的(aspect,rating)摘要.

基于DPSIR-对称交互熵的泰安市水—城地人产系统协调性评价

为将四水四定落到实处,构建了基于DPSIR-对称交互熵的水—城地人产系统评价模型,通过构建山东省泰安市评价指标体系,开展协调性发展综合评价,进而建立耦合协调度模型评价各子系统间发展协调性。研究表明,各子系统综合评价值呈现波动上升趋势,其中状态(S)和响应(R)子系统波动上升趋势最为稳定,最不稳定的为压力(P)子系统;按照历年系统耦合协调度将2006年以来泰安市水—城地人产系统发展划分为过渡阶段(2006~2010年)、协调发展阶段(2011~2019年)、高质量发展阶段(2020年以后);宁阳县、东平县协调度仍有待提高,未来应当着重推进泰安市水网建设、供、用水结构优化和产业结构升级等工作。研究结果可为泰安市国土空间规划及水利高质量发展提供支持。

基于预训练语言模型的旅游评论文本方面级情感分析研究

为了促进旅游行业的消费和经济发展,对游客在线上平台发表的景区评论文本进行分析,深入挖掘其中的细粒度情感信息,以更好地迎合游客的偏好。在实际场景中,一个句子会涉及多个实体词,致使难以准确识别它们对应的情感属性关系;且旅游场景下的数据集存在稀缺和样本不平衡问题。由此构建了基于深度学习和提示知识的预训练语言模型,通过构建离散提示模板联合训练两个子任务,并对数据集中的少数样本进行了数据增强处理,同时在训练阶段为损失函数设置不同的权重。实验结果显示,模型在旅游评论文本数据集和公开数据集SemEval2014_Restaruant上取得了显著效果,F1值分别达到了80.81%和83.71%,有助于旅游机构实现对每个城市景点的个性化分析。

一种使用AspectJ技术的Java契约式编程语言模型

契约式开发方法是一种借鉴了形式化方法的优点而又易于实践的开发方法学,然而Eiffel等传统的契约式编程语言难以学习与推广。本文提供了一种模型,该模型利用面向方面的编程技术,在面向对象程序设计语言基础上,增加了契约式约束检查。并以Java面向对象程序设计语言为例,使用AspectJ技术对Java程序中的接口、类、继承、数据类型、构造器、域、方法、异常增加关注点,进行契约约束检查,最终形成一种易于实践且具有契约式功能的开发语言环境。

考虑软矿物纵横比的页岩岩石物理建模及其应用

以往针对页岩储层的岩石物理建模常忽略孔隙类型与软矿物纵横比对弹性模量的影响。本文同时考虑孔隙类型、孔隙形状与软矿物纵横比,建立横向各向同性页岩岩石物理模型:将固体矿物分为硬矿物与软矿物两类,考虑软矿物的各向异性特征与形状变化;基于储层实际情况将孔隙分为粒内孔、有机孔与粒间孔三类,孔隙形状分为硬孔隙与软孔隙两种;最后,利用粒子群法反演输入参数,进一步计算纵横波速度、各向异性参数与岩石力学参数。结合实际资料应用,用已知测井横波速度与各向同性岩石力学计算结果进行对比,结果表明该模型的应用效果较好。

Anti-model测试框架的研究与实现

对于继承的系统或基于组件的系统,常常得不到系统详细的信息,测试这样的系统很困难,采用Anti-model测试思想和方法可以解决此类问题。基于Anti-model测试思想,设计出基于Anti-model的测试框架,详细分析和说明了Anti-model的测试过程中的几个关键性的技术,包括动态数据的获得、动态数据的存储格式、综合行为模型、修正和精炼系统行为模型、再测试的测试用例的获得等。编程实验表明,本方法具有实用性和可行性。

基于aspect封装的需求级特征复用方法

可复用的软件资产的确定为软件复用活动提供了基础.特征模型通过特征以及特征之间的关系来有效地组织特定领域的软件需求,为领域需求的复用提供有力支持.面向方面系统设计着眼于减少软件开发中需求或代码的纠结,将识别出的横切关注点封装成aspect,有利于开发模块化良好的软件产品以及高效的软件维护和复用.为方便特征复用,提出了一种在系统需求分析级别对特征模型进行aspect化封装的方法,可提取出遗留系统中的可复用部分.首先,通过分析同一领域遗留系统的需求文档,识别出系统关注点,建立领域的关注点层次结构;其次,基于领域关注点层次结构,提取领域特征,并对相似特征进行aspect化封装,形成特征层次模型;最后,基于建立的特征模型以及封装的aspect开发新系统,达到软件复用目的.基于新方法进行了实例分析,通过复用两个不同的Web遗留系统得到一个新的Web系统.可以看出新方法对同一个领域中的多遗留系统地复用有较好的指导意义.