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Predicting the Maintainability of Open Source Software Using Design Metrics

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Wuhan University Journal of Natural Sciences 2008年第1期13卷 14-20页

作者： ZHOU Yuming1,2, XU Baowen1,3.1. School of Computer Science and Engineering, Southeast University, nanjing 210096, jiangsu,{3. 2. Department of Computing, Hong Kong Polytechnic University, Hong Kong, china 3. jiangsu institute of Software quality, nanjing 210096, jiangsu,{3. School of Computer Science and Engineering Southeast University Nanjing China Department of Computing Hong Kong Polytechnic University Hong Kong China jiangsu institute of Software quality Nanjing China

This paper empirically investigates the relationships between 15 design metrics and maintainability of 14. Java open source software. The results show that size and complexity metrics are strongly related to the maintainability of open source software. However, cohesion and coupling, as currently captured by existing metrics, do not seem to have a significant impact on maintainability. When used together, these metrics can predict system maintainability fairly accurately （mean MREs below 3.%）.

关键词： open source: object-oriented maintainability metric prediction regression

Association between ICU quality and in-hospital mortality of V-V ECMO-supported patients—the ECMO quality improvement action(EQIA)study:a national cohort study in china from 2017 to 2019

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Frontiers of Medicine 2024年第2期18卷 315-326页

作者： Wei Cheng Jieqing Chen Xudong Ma Jialu Sun Sifa Gao Ye Wang Longxiang Su Lu Wang Wei Du Huaiwu He Yujie Chen Zunzhu Li Qi Li Jianhua Sun Hongbo Luo Jinbang Liu Guangliang Shan Bing Du Yanhong Guo Dawei Liu Chang Yin Xiang Zhou on behalf of the china National Critical Care quality Control Center-the ECMO quality improvement action(EQIA)study Department of Critical Care Medicine State Key Laboratory of Complex Severe and Rare DiseasesPeking Union Medical College HospitalChinese Academy of Medical Science and Peking Union Medical CollegeBeijing100730China Information Center Department/Department of Information Management State Key Laboratory of Complex Severe and Rare DiseasesPeking Union Medical College HospitalPeking Union Medical College&Chinese Academy of Medical SciencesBeijing100730China Department of Medical Administration National Health Commission of the People’s Republic of ChinaBeijing100044China School of Population Medicine and Public Health Chinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing100730China Department of Epidemiology and Biostatistics Institute of Basic Medicine SciencesChinese Academy of Medical Sciences(CAMS)&School of Basic MedicinePeking Union Medical CollegeBeijing100730China National institute of Hospital Administration National Health Commission of the People’s Republic of ChinaBeijing100044China 不详

This cohort study was performed to explore the influence of intensive care unit(ICU)quality on in-hospital mortality of veno-venous(V-V)extracorporeal membrane oxygenation(ECMO)-supported patients in *** study involved all V-V ECMO-supported patients in 3.8 of 1700 tertiary hospitals from 2017 to 2019,using data from the National Clinical Improvement System and china National Critical Care quality Control *** quality was assessed by quality control indicators and capacity *** the 2563.V-V ECMO-supported patients in 3.8 hospitals,a significant correlation was found between ECMO-related complications and *** reintubation rate within 4. hours after extubation and the total ICU mortality rate were independent risk factors for higher in-hospital mortality of V-V ECMO-supported patients(cutoff:1.5%and 7.0%;95%confidence interval:1.05–1.4. and 1.04.1.4.;odds ratios:1.25 and 1.23.P=0.012 and P=0.015,respectively).Meanwhile,the V-V ECMO center volume was a protective factor(cutoff of≥50 cases within the 3.year study period;95%confidence interval:0.57–0.83.odds ratio:0.69,P=0.0001).The subgroup analysis of 864.patients in 11 high-volume centers further strengthened these ***,ICU quality may play an important role in improving the prognosis of V-V ECMO-supported patients.

关键词： veno-venous extracorporeal membrane oxygenation in-hospital mortality high-volume centers quality control intensive care unit capacity parameters

Multiple Effects of Energy Issues and Countermeasures: A Case of Shandong Province

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Chinese Journal of Population,Resources and Environment 2008年第4期6卷 88-94页

作者： Wang Chengxin1,2 , Wang Gefang3., Yao Shimou4.1. College of Population, Resources and Environment, Shandong Normal University, Jinan Shandong 250014. china 2. Research Center of Cycle Economy of Shandong Province, Jinan Shandong 250001, china 3. Party School of the Shandong Committee of CPC, Jinan Shandong 250021, china 4. {3. institute of Geography and Limnology, Chinese Academy of Sciences, {3. jiangsu 210008, china College of Population Resources and Environment Shandong Normal University Research Center of Cycle Economy of Shandong Province Party School of the Shandong Committee of CPC nanjing institute of Geography and Limnology Chinese Academy of Sciences

Energy is now becoming the bottleneck of urban and regional development. The paper takes Shandong Province, one of the most energy consuming provinces in china, as an example, uses quantity methods such as SPSS (Stastics Package for Social Science) cluster sampling and regression analysis, and applies quantity analysis, to analyze the situation of energy issues in Shandong province. The conflicts between the quick industrialization and increasing extensive economic development, between urban population and energy consuming per head, between the infinite energy consuming desire and the low level of managing system, and between the unstable world energy supply and the limited energy storage in china are the main factors of energy crisis in Shandong, which not only results in energy shortage, but also becomes the barrier of economic and social development. In order to ensure sufficient energy supply for Shandong province in the 21st century, we should take countermeasures, such as changing the economic development model, pursuing a multiple and high quality energy strategy, improving the intensive urbanization strategy, and building a scientific energy system.

关键词： energy effects countermeasure Shandong Province

Analyzing architecture articles

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中国科学：技术科学英文版 2010年第7期53卷 1739-1742页

作者： QI Kang Research institute of Architecture, Southeast University, nanjing 210096,{3. 1. Research institute of Architecture Southeast University Nanjing 210096 China

In the present study, we express the quality, function, and characteristics of architecture to help people comprehensively understand what architecture is. We also reveal the problems and conflict found in population, land, water resources, pollution, energy, and the organization systems in construction. china’s economy is transforming. We should focus on the cities, architectural environment, energy conservation, emission-reduction, and low-carbon output that will result in successful green development. We should macroscopically and microscopically analyze the development, from the natural environment to the artificial environment; from the relationship between human beings and nature to the combination of social ecology in cities, and farmlands. We must learn to develop and control them harmoniously and scientifically to provide a foundation for the methods used in architecture research.

关键词： architecture science sustainable development

A multicast routing algorithm with multiple trees

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Journal of Systems Engineering and Electronics 2005年第2期16卷 426-432页

作者： Cui Xunxue 1,2 , Gao Wei3.& Fang Hongyu4.. New Star Research institute of Applied Technology, Hefei 23.03., P. R.{4. 2. jiangsu Key Laboratory of Computer Information Processing Technology,Soochow University, Suzhou 215006, P. R.{4. 3. Department of Electronic Engineering and Information Science,University of Science and Technology of{4., Hefei 23.027, P. R.{4. 4. School of Electronic Science and Technology, Anhui University, Hefei 23.03., P. R.{4. New Star Research institute of Applied Technology Hefei 230031 P. R. China 2. jiangsu Key Laboratory of Computer Information Processing Technology Soochow University Suzhou 215006 P. R. China Department of Electronic Engineering and Information Science University of Science and Technology of China Hefei 230027 P. R. China School of Electronic Science and Technology Anhui University Hefei 230039 P. R. China

quality of service (QoS) multicast routing has continued to be a very important research topic in the Internet. A method of multicast routing is proposed to simultaneously optimize several parameters based on multiobjective genetic algorithm, after the related work is reviewed. The contribution lies on that the selection process of such routing is treated with multiobjective optimization. Different quality criterions in IP network are taken into account for multicast communications. A set of routing trees is generated to approximate the Pareto front of multicast problem. Multiple trees can be selected from the final set of nondominated solutions, and applied to obtain a good overall link cost and balance traffic distribution according to some simulation results.

关键词： multicast routing quality of service multiobjective optimization genetic algorithms.

Role of gallium wetting layer in high-quality ZnO growth on sapphire (0001) substrates

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Science china(Physics,Mechanics & Astronomy) 2004年第5期47卷 612-620页

作者： ZENG Zhaoquan1,3. WANG Yong2, DU Xiaolong1, MEI Zengxia1, KONG Xianghe3. JIA Jinfeng1, XUE Qikun1 & ZHANG Ze2, 4.1. State Key Laboratory for Surface Physics, institute of Physics, Chinese Academy of Sciences, Beijing 100080, china 2. Laboratory of Electron Microscopy, institute of Physics, Chinese Academy of Sciences, Beijing 100080, china 3. College of Physics and Engineering, Qufu Normal University, Qufu 273.65, china 4. Beijing University of Technology, Beijing 100022, china 1. State Key Laboratory for Surface Physics Institute of Physics Chinese Academy of Sciences 100080 Beijing China 2. College of Physics and Engineering Qufu Normal University 273165 Qufu China 3. Laboratory of Electron Microscopy Institute of Physics Chinese Academy of Sciences 100080 Beijing China 4. Beijing University of Technology 100022 Beijing China

A Ga wetting layer was used to modify the surface structure of sapphire (0001) substrate to prepare high-quality ZnO film by radio frequency plasma-assisted molecule beam epitaxy. We found that this Ga layer plays a crucial role in eliminating 3. rotation domains, controlling polarity and decreasing defect density in ZnO epilayers, as demonstrated by in situ reflection high energy electron diffraction, ex situ high resolution X-ray diffraction and high resolution cross-sectional transmission electron microscopy. Zn-polar film of ZnO was determined by convergent beam electron diffraction. A Ga bilayer model is proposed to understand the effects of the Ga wetting layer on high-quality ZnO growth.

关键词： Ga wetting layer, sapphire, polarity, defect density, zinc oxide, rf-MBE, RHEED, HRXRD, TEM, CBED.

Grey Disorder in Field Flue-Cured Tobacco

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Pedosphere 1999年第4期9卷 369-374页

作者： ZHANG XIN ZHAO QIBO YU HUIMEI CAO ZHIHONG(1institute of Soil Science, the Chinese Academy of Sciences, nanjing 210008 (china))(2{3. Provincial Tobacco Company, nanjing 210O29 (china)) 中科院南京土壤所江苏南京 210008 江苏省烟草公司江苏南京中科院南京土壤所江苏南京

A field study was carried out on the grey disorder in fine-cured tobacco (Nicotiana tabacum L.) *** results showed that low Eh and high available Fe content in the soils were responsible for the grey tobaccoand dead roots. Grey disorder leaves produced low quality lamina, which was low in N, nicotine, reducedsugar and K contents. In this study’ soil available Mn and leaf Mn contents were in a relatively low level andshould not be an important factor in the occurrence of grey disorder in fine-cured tobacco.

关键词： flue-cured tobacco grey disorder iron manganese toxicity

Gas formation mechanism of marine carbonate source rocks in china

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Science china Earth Sciences 2005年第4期48卷 441-453页

作者： ZHAO Wenzhi1, WANG Zhaoyun1, HE Haiqing2, ZHANG Mingjie3. WANG Hongjun1, WANG Yunpeng4.& QIN Yong5 1. Research institute of Petroleum Exploration & Development, Petrochina, Beijing 100083.{4. 2. Petrochina Exploration & Production, Beijing 100011,{4. 3. Department of Geology, Lanzhou University, Lanzhou 73.000,{4. 4. Guangzhou Geochemical institute, Chinese Academy of Sciences, Guangzhou 51064.,{4. 5.{4. University of Mining and Technology, Xuzhou 221000,{4. 1. Research institute of Petroleum Exploration & Development 100083 PetroChinaBeijin China 2. Petrochina Exploration & Production 100011 Beijing China 3. Department of Geology Lanzhou University 730000 Lanzhou China 4. Guangzhou Geochemical institute Chinese Academy of Sciences 510640 Guangzhou China 5. china University of Mining and Technology 221000 Xuzhou China

By breaking through the conventional ideology on the study of gas-formation mechanism of source rocks which focused on merely the characteristics of source rocks them- selves, and based on the development and distribution characteristics of marine carbonate source rocks in the medium-to-bottom parts of the Chinese superimposed sedimentary basins as well as various processes in the course of gas generation and reservoir forming, the complex hydrocarbon-generating model of carbonates is established. Such a model concerns not only the “three-stage” gas formation characteristics of carbonates, but also the gas generation process due to a thermal cracking of oil and the re-generation process of gas from heated secondary organic matters during the gas-generation and reservoir-forming course. The high-quality hy- drocarbon generating matter of marine carbonate source rocks determined a high gas-oil ratio and tended to form paleo-oil-reservoirs, representing an enrichment process of organic matters. The thermal cracking of oil in palaeo-oil-reservoirs is an important means for the effective forma- tion of gas reservoirs. The secondary organic matters in carbonate reservoirs may regenerate gas after a secondary deep burial, thus becoming an effective gas source.

关键词： carbonate, three-stage hydrocarbon generation, inhibitive effect of maturity, oil-cracking gas, second-ary asphalt gas.

An analysis on the evolvement processes of lake eutrophication and their characteristics of the typical lakes in the middle and lower reaches of Yangtze River

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Chinese Science Bulletin 2006年第13期51卷 1603-1613页

作者： CHENG Xiaoying1,2,3.& LI Shijie1 1. nanjing institute of Geography & Limnology, Chinese Academy of Sciences, nanjing 210008,{3. 2. The Key Laboratory of Industrial Biotechnology, Ministry of Educa- tion, Southern Yangtze University, Wuxi 214.3.,{3. 3. School of Biotechnology, Southern Yangtze University, Wuxi 214.3.,{3. nanjing institute of Geography & Limnology Chinese Academy of Sciences Nanjing China The Key Laboratory of Industrial Biotechnology Ministry of Education Southern Yangtze University Wuxi China School of Biotechnology Southern Yangtze University Wuxi China

According to the study on the aquatic environment of the typical lakes in the middle and lower reaches of Yangtze River, lake eutrophication is a process in which the lake ecosystem degenerates, resulting in the deterioration of the water quality due to the enrichment of the nutrients. Moreover, the succession of lake ecosystem and change of water quality both couple well with the evolvement of tro- phic state. Then the conceptual model is mentioned and ten lake states are classified. Based on these, the authors analyzed the eutrophication processes of the typical lakes in the middle and lower reaches of Yangtze River. The large lakes with taking in - send- ing out water typical of Poyang Lake evolve from State 1 before the 1980s into State 2 after the 1980s, the large and medium lakes typical of Taihu Lake evolve from State 1-2 in the 1960s into State 8 in the 1980s then into State 9 in the 1990s, the medium and small shallow lakes typical of Honghu Lake evolve from State 1 in the 1960s into State 2 after the 1980s and the small city (suburban) lakes typical of Donghu Lake evolve from State 2 in the 1960s into State 9 after the 1970s. Further, the 1980s is the key con- version period of the lakes of various types typical of Poyang Lake, Honghu Lake and Taihu Lake con- verting into mesotrophic state, the 1990s is that of Taihu Lake into eutrophic state and the 1970s is thatof the small city (suburban) lakes typical of Donghu Lake into eutrophic state. The series of nutrient evolvement of different typical lakes are similar, but the processes are not synchronous, which is related to the various human and natural driving mechanisms in lake basins.

关键词：长江湖泊富营养化概念模型转变时期驱动机制