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Software quality assessment model: a systematic mapping study

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Science China(Information Sciences) 2019年第9期62卷 5-22页

作者： meng YAN Xin XIA Xiaohong ZHANG ling XU Dan YANG Shanping LI College of Computer Science and Technology Zhejiang University School of Software Engineering Chongqing University Faculty of Information Technology Monash University

Quality model is regarded as a well-accepted approach for assessing, managing and improving software product quality. There are three categories of quality models for software products, i.e., definition model, assessment model, and prediction model. Quality assessment model(QAM) is a metric-based approach to assess the software quality. It is typically regarded as of high importance for its clear method on how to assess a system. However, the current state-of-the-art in QAM research is under limited *** address this gap, the paper provides an organized and synthesized summary of the current QAMs. In detail, we conduct a systematic mapping study(SMS) for structuring the relevant articles. We obtain a total of 716 papers from the five databases, and 31 papers are selected as relevant studies at last. In summary, our work focuses on QAMs from the following aspects: software metrics, quality factors, aggregation methods,evaluation methods and tool support. According to the analysis results, our work discovers five needs that researchers in this area should continue to address:(1) new method and criteria to tailor a quality framework(i.e., structure of software metrics and quality factors) according to different specifics,(2) systematic investigations on the effectiveness, strength and weakness of different aggregation methods to guide the method selection in different context,(3) more investigations on evaluating QAMs in the context of industrial cases,(4) further investigations or real-world case studies on the QAMs related tools, and(5) building a public and diverse software benchmark which can be adopted in different application context.

关键词： software quality systematic mapping study quality assessment model aggregation method

学前教育经历对小学中低年级学生学业表现的影响——基于CFPS数据的实证研究

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北京教育学院学报 2025年第1期39卷 67-75页

作者：周玲陈静北京理工大学经济学院北京102488 青岛市西海岸新区香江路第二小学山东青岛266427

学前教育是我国国民教育体系的组成部分,是重要的社会公益事业。基于中国家庭追踪调查(CFPS)2018年数据,采用计量分析方法,探讨学前教育获得年限和学前教育获得质量(幼儿园性质)对小学中低年级学生语文、数学学业表现的影响。结果表明,... 详细信息

学前教育是我国国民教育体系的组成部分,是重要的社会公益事业。基于中国家庭追踪调查(CFPS)2018年数据,采用计量分析方法,探讨学前教育获得年限和学前教育获得质量(幼儿园性质)对小学中低年级学生语文、数学学业表现的影响。结果表明,学前教育获得年限可以预测小学中低年级学生的数学成绩,且在不同性别、年级、户口类型的学生中存在差异;学前教育获得质量对小学中低年级学生的语文、数学成绩均无显著影响。建议在确保幼儿学前教育基本获得年限的基础上,完善学前教育供给,促进家园共育,以进一步保障幼儿获得高质量的学前教育。

关键词：学前教育学业表现小学中低年级教育高质量发展

Carbon-based nanomaterials cause toxicity by oxidative stress to the liver and brain in Sprague-Dawley rats

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Nuclear Science and Techniques 2024年第6期35卷 54-64页

作者： Ying-Ying Xu Chan Jin meng Wu Jian-Ye Zhou Hui-ling Wei Department of Gastroenterology China-Japan Friendship HospitalBeijing 100029China Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China Institute of Particle and Nuclear Physics College of PhysicsHenan Normal UniversityXinxiang 453007China

Carbon-based nanomaterials have important research significance in various disciplines,such as composite materials,nanoelectronic devices,biosensors,biological imaging,and drug ***,the human and ecological risks associated with carbon-based nanomaterials have received increasing ***,the biological safety of carbon based nanomaterials has not been systematically *** this study,we used different types of carbon materials,namely,graphene oxide(GO),single-walled carbon nanotubes(SWCNTs),and multiwalled carbon nanotubes(MWCNTs),as models to observe their distribution and oxidative damage in *** results of Histopathological and ultrastructural examinations indicated that the liver and lungs were the main accumulation targets of these ***-μ-XRF analysis revealed that SWCNTs and MWCNTs might be present in the *** shows that the three types of carbon-based nanomaterials could cross the gas-blood barrier and eventually reach the liver *** addition,SWCNTs and MWCNTs could cross the blood-brain barrier and accumulate in the cerebral *** increase in ROS and MDA levels and the decrease in GSH,SOD,and CAT levels indicated that the three types of nanomaterials might cause oxidative stress in the *** suggests that direct instillation of these carbon-based nanomaterials into rats could induce ROS *** addition,iron(Fe)contaminants in these nanomaterials were a definite source of free ***,these nanomaterials did not cause obvious damage to the rat brain *** deposition of selenoprotein in the rat brain was found to be related to oxidative stress and Fe *** information may support the development of secure and reasonable applications of the studied carbon-based nanomaterials.

关键词： Carbon-based nanomaterials Oxidative stress Trace element distribution TEM SR-μ-XRF

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Visible-Light-Promoted Formation of C-C and C-P Bonds Derived from Evolution of Bromoalkynes under Additive-Free Conditions:Synthesis of 1,1-Dibromo-1-en-3-ynes and Alkynylphosphine Oxides

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Chinese Journal of Chemistry 2021年第4期39卷 873-878页

作者： Hailong Xu Rui Chen Hongjie Ruan Ruyi Ye ling-Guo meng Key Laboratory of Green and Precise Synthetic Chemistry and Applications Ministry of EducationSchool of Chemistry and Materials ScienceHuaibei Normal UniversityHuaibeiAnhui235000 China

Main observation and conclusion The controllable achievement of C-C and C-P bond formations is developed via visible-light-promoted bromoalkyne dimerization or its further transformation with secondary phosphine *** 1,1-dibromo-1-en-3-ynes are formed when bromoalkyne is exposed to *** alkynylphosphine oxides are generated when bromoalkynes are mixed with secondary phosphine oxides.

关键词： Visible-light C-C bond C-P bond Bromoalkynes 1,1-Bibromo-1-en-3-ynes

A Direct Route to Tetrahydropyridazine Derivatives via DMAP-Catalyzed [4+2] Annulation of Allenoates with Arylazosulfones

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Chinese Journal of Chemistry 2023年第22期41卷 3031-3036,I0002页

作者： Xin Ji Ziyang Li Jinfeng Zhang Yicheng Zhang ling-Guo meng Key Laboratory of Green and Precise Synthetic Chemistry and Applications Ministry of EducationSchool of Chemistry and Materials ScienceHuaibei Normal UniversityHuaibeiAnhui 235000China

Herein,a DMAP-catalyzed[4+2]annulation ofα-substituted allenoates with arylazosulfones is reported,which affords facile access to tetrahydropyridazine derivative in synthetically useful *** reaction features mild conditions and good functional group ***,the resultant products can be readily transformed into pyridazin-3-one derivatives in the presence of DDQ.

关键词： DMAP [4+2]Cycloaddition Tetrahydropyridazihe derivatives Pyridazin-3-one derivatives Allenes Zwitterions N-Heterocycles

Application of an extreme learning machine network with particle swarm optimization in syndrome classification of primary liver cancer

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Journal of Integrative Medicine 2021年第5期19卷 395-407页

作者： Liang Ding Xin-you Zhang Di-yao Wu meng-ling Liua School of Computer Jiangxi University of Traditional Chinese MedicineNanchang 330004Jiangxi ProvinceChina School of Pharmacy Jiangxi University of Traditional Chinese MedicineNanchang 330004Jiangxi ProvinceChina

Objective: By optimizing the extreme learning machine network with particle swarm optimization, we established a syndrome classification and prediction model for primary liver cancer(PLC), classified and predicted the syndrome diagnosis of medical record data for PLC and compared and analyzed the prediction results with different algorithms and the clinical diagnosis results. This paper provides modern technical support for clinical diagnosis and treatment, and improves the objectivity, accuracy and rigor of the classification of traditional Chinese medicine(TCM) ***: From three top-level TCM hospitals in Nanchang, 10,602 electronic medical records from patients with PLC were collected, dating from January 2009 to May 2020. We removed the electronic medical records of 542 cases of syndromes and adopted the cross-validation method in the remaining10,060 electronic medical records, which were randomly divided into a training set and a test *** on fuzzy mathematics theory, we quantified the syndrome-related factors of TCM symptoms and signs, and information from the TCM four diagnostic methods. Next, using an extreme learning machine network with particle swarm optimization, we constructed a neural network syndrome classification and prediction model that used "TCM symptoms + signs + tongue diagnosis information + pulse diagnosis information" as input, and PLC syndrome as output. This approach was used to mine the nonlinear relationship between clinical data in electronic medical records and different syndrome types. The accuracy rate of classification was used to compare this model to other machine learning classification ***: The classification accuracy rate of the model developed here was 86.26%. The classification accuracy rates of models using support vector machine and Bayesian networks were 82.79% and 85.84%,respectively. The classification accuracy rates of the models for all syndromes in this paper were between82.15% and 93.82%.C

关键词： Primary liver cancer Syndrome type Particle swarm Extreme learning machine Fuzzy mathematics

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Recent advances in glinty appearance rendering

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Computational Visual Media 2022年第4期8卷 535-552页

作者： Junqiu Zhu Sizhe Zhao Yanning Xu Xiangxu meng Lu Wang ling-Qi Yan Shandong University JinanChina University of California Santa BarbaraUSA

The interaction between light and materials is key to physically-based realistic ***,it is also complex to analyze,especially when the materials contain a large number of details and thus exhibit"glinty"visual *** methods of producing glinty appearance are expected to be important in next-generation computer *** provide here a comprehensive survey on recent glinty appearance *** start with a definition of glinty appearance based on microfacet theory,and then summarize research works in terms of representation and practical *** have implemented typical methods using our unified platform and compare them in terms of visual effects,rendering speed,and memory ***,we briefly discuss limitations and future research *** hope our analysis,implementations,and comparisons will provide insight for readers hoping to choose suitable methods for applications,or carry out research.

关键词： glinty appearance Monte Carlo methods rendering

Labdane Diterpenoids from Coleus forskohlii （Willd.） Briq.

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Journal of Integrative Plant Biology 2006年第4期48卷 478-481页

作者： ling-ling Xu ling-Yi Kong Department of Natural Medicinal Chemistry China Pharmaceutical University Nanjing 210009 China

in order to investigate the active substances of Coleus forskohlii（Wiiid.） Brlq., a new labdane dlterpenold, 12- hydroxy-8,*** acid, together with two 8,13-epoxylabd-14-ene-11-one dlterpenolds, 6-acetyl-1- deoxyforskolln and 6-acetyl-1,9-dldeoxyforskolln, was Isolated on the basis of various chromatographic technlques and spectroscopic methods.

关键词： 6-acetyl-1-deoxyforskolin 6-acetyl-1 ,9-dideoxyforskolin Coleus forskohlii 12-hydroxy-8,13E-labdadien-15-oic acid labdane diterpenoid.

A Comparison of Corrosion Behavior in Saline Environment: Rare Earth Metals (Y, Nd, Gd, Dy) for Alloying of Biodegradable Magnesium Alloys

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Journal of Materials Science & Technology 2013年第9期29卷 781-787页

作者： Xu Zhao ling-ling Shi Jian Xu Shenyang National Laboratory for Materials Science Institute of Metal Research Chinese Academy of Sciences

Rare earth （RE） metals are widely used as the alloying implants. However, corrosion behavior of pure RE elements in biodegradable magnesium alloys as medical metals not only in physiological media but also in chlorinated saline environment is not well understood. In the present work, the RE metals Y, Nd, Gd and Dy are selected to investigate their corrosion behavior in 0.1 mol/L NaCI solution with immersion and electrochemistry techniques. As indicated, corrosion of the currently investigated RE metals is promoted in the order of Dy, Y, Gd and Nd. In terms of electrochemical response, such a sequence correlates with the increased impedance and the decreased corrosion rate （CR）. These RE metals manifest weak ability for passivation in the native surface. Then, reaction with aqueous solution easily happens through the anodic dissolution and cathodic hydrogen evolution. The corrosion products, RE（OH）3, adhered on the surface of RE metals, do not have an appreciable power to resist the reaction proceeding with corrosive chloride ions. In contrast to pure Mg, the RE metals, including Y, Nd, Gd and Dy, exhibit significantly fragile corrosion resistance in saline media. Therefore, with the curr correlation of corrosion resistance between RE-contain ent findings, it is impossible to reveal a well-defined ng Mg alloy and RE metal itself

关键词： Rare earth Biodegradable metal Magnesium alloy Corrosion behavior

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