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Surface ozone in global cities:A synthesis of basic features,exposure risk,and leading meteorological driving factors
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作者 Jinmian Ni Jiming Jin +6 位作者 Yanwen Wang Bin Li Qian Wu Yanfei Chen Shenwen Du Yilin Li Chao He 《Geography and Sustainability》 CSCD 2024年第1期64-76,共13页
Long-term exposure to high surface ozone(O_(3))concentrations,a complex oxidative atmospheric pollutant,can adversely impact human health.Based on O_(3)monitoring data from 261 cities worldwide in 2020,generalized add... Long-term exposure to high surface ozone(O_(3))concentrations,a complex oxidative atmospheric pollutant,can adversely impact human health.Based on O_(3)monitoring data from 261 cities worldwide in 2020,generalized additive model(GAM)and spatial data analysis(SDA)methods were applied in this study to quantitatively evaluate the spatiotemporal distribution of O_(3)concentration,exposure risk,and dominant meteorological factors.Results indicated that over 40%of the cities worldwide were exposed to harmful O_(3)concentration ranges(40-60μg/m^(3)),with most cities distributed in China and India.Moreover,significant seasonal variations in global O_(3)concentrations were observed,presenting as summer(45.6μg/m^(3))>spring(47.3μg/m^(3))>autumn(38.0μg/m^(3))>winter(33.6μg/m^(3)).Exposure analysis revealed that approximately 12.2%of the population in 261 cities were exposed to an environment with high O_(3)concentrations(80-160μg/m^(3)),with about 36.32 million people in major countries.Thus,the persistent increase in high O_(3)levels worldwide is a critical factor contributing to threats to human health.Furthermore,GAM results indicated temperature,relative humidity,and wind speed as primary determinants of O_(3)variability.The synergy of meteorological factors is critical for understanding O_(3)changes.Our findings are important for enforcing robust air quality policies and mitigating public risk. 展开更多
关键词 Ozone pollution Spatiotemporal variation Exposure risk GAM Meteorological factors
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Construction and Implementation of Knowledge System and Knowledge Management Platform of Software Enterprise
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作者 Yu Wenlong 《International Journal of Technology Management》 2013年第12期104-108,共5页
As a typical knowledge-intensive enterprise, knowledge has become the most important capital of the software enterprise, and the accumulation of knowledge, which makes the accumulation of knowledge especially importan... As a typical knowledge-intensive enterprise, knowledge has become the most important capital of the software enterprise, and the accumulation of knowledge, which makes the accumulation of knowledge especially important. Implementing knowledge management can integrate dispersed and unordered knowledge into organic and organizational knowledge system. Effective application and continuous enhancement of organizational knowledge system can from the core competence of software enterprise. For the characteristic that the software enterprise gives priority to software development, the paper uses the knowledge in the process of software development as the core (it is limited to time and energy and doesn' t involve the knowledge of the other departments), and develops the research on the construction of knowledge system of software enterprise. For the knowledge system, the paper constructs and implements a knowledge management platform supporting the operation and management. 展开更多
关键词 knowledge system knowledge management knowledge management platform
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Analysis on Protection of GI Product Hanyuan Chinese Prickly Ash and Suggestions of its Industrial Development 被引量:2
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作者 SU Yue-juan 《Asian Agricultural Research》 2012年第4期56-59,76,共5页
Hanyuan Prickly Ash is a type of GI products with very deep cultural essence.From such humanistic factors as name origin,historical origin,fame,cultivation technology,and management measure,and such natural factors as... Hanyuan Prickly Ash is a type of GI products with very deep cultural essence.From such humanistic factors as name origin,historical origin,fame,cultivation technology,and management measure,and such natural factors as climatic environment and soil conditions,this paper analysis key factors for protection of GI product Hanyuan Prickly Ash.Then it discusses about industrial development of Hanyuan Prickly Ash from suitable planting areas and climate.It proposes that we should gradually raise safety and hygienic indexes,revise and implement local standards,strengthen popularization of harmless production technologies and quality control of product,promote "enterprise + base" industrial model,and implement government marketing of brand and industry. 展开更多
关键词 Hanyuan Prickly Ash Geographic Indication Industrial development
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Study on Eco-environmental Stress Trend of Inner Mongolia Based on Ecological Stress Index 被引量:1
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作者 HAO Chen-guang SHAN Wen-guang 《Meteorological and Environmental Research》 CAS 2012年第3期57-60,64,共5页
[Objective] The study aimed to analyze the eco-environrnental stress trend of Inner Mongolia using ecological stress index method. [Methed] On the basis of the improved ecological stress index (ESI) analysis method,... [Objective] The study aimed to analyze the eco-environrnental stress trend of Inner Mongolia using ecological stress index method. [Methed] On the basis of the improved ecological stress index (ESI) analysis method, the eco-environmental stress trend of Inner Mongolia from 1996 to 2009 was analyzed, as well as the changes of eco-environmental stress in major industrial cities of Inner Mongolia in 2008. [ Result] With the economic development of Inner Mongolia from 1996 to 2009, the U-shape change could be found in the eco-environmental stress, showing an upward trend on the whole, especially since 2003, and there was a sharp raise in the environmental pollution index. In addition, the eco-enviren- mental stress lessened in most major cities of Inner Mongolian in 2008, but it was in a polarization state, that is, Baotou, Wuhai and Hohhot biased resource and energy consumption, while Ordos and Chifeng biased environmental pollution. [ Conclusion] The research could provide scientific ref- erences for the protection of ecological environment and the adjustment of industrial structure in Inner Mongolia. 展开更多
关键词 Eco-environmental stress Regional economy Resource and energy consumption Environmental pollution Inner Mongolia China
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Improving the BER performance of turbo codes with short frame size based on union bound 被引量:1
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作者 邵霞 Li Ping Zhang Weidang 《High Technology Letters》 EI CAS 2015年第3期309-314,共6页
timizing the formula, the energy for every bit of the codeword is optimized to achieve the minimum BER at high SNR region. At last, an adjustable parameter is employed to compensate the degrada- tions of BER at low an... timizing the formula, the energy for every bit of the codeword is optimized to achieve the minimum BER at high SNR region. At last, an adjustable parameter is employed to compensate the degrada- tions of BER at low and moderate SNR regions. Case studies indicate that the improvements of BER for turbo codes with short frame size are significant at a wide range of SNR 展开更多
关键词 channel coding bit error rate (BER) energy allocation turbo code
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Source and commingling features of light oils from the Chepaizi uplift in the Junggar Basin, Northwest China
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作者 ZHANG Zhihuan QIN Liming +5 位作者 LI Wei WANG Chunjiang QIU Nansheng MENG Xianlong ZHANG Zhenying YUAN Dongshan1 《Chinese Journal Of Geochemistry》 EI CAS 2010年第2期121-129,共9页
Geochemical composition characteristics of light oils from the Tertiary in the west of the Chepaizi uplift in the Junggar basin, northwest China, are distinct from those of biodegraded oils derived from the Permian in... Geochemical composition characteristics of light oils from the Tertiary in the west of the Chepaizi uplift in the Junggar basin, northwest China, are distinct from those of biodegraded oils derived from the Permian in the study area and crude oils from some adjacent oil fields such as the Chepaizi and Xiaoguai oilfields. Oil source corre-lation shows that light oils in the study area have similar n-alkane and isoprenoid distribution patterns and carbon isotope compositions with the coal-derived oils from the Jurassic, and display obvious discrepancy on biomarker composition characteristics with the Cretaceous source rock extracts, inferring that they are probably the mixed oils from the Jurassic coal measures and Cretaceous source rocks. In this study, combined with the geochemical data of coal-derived oils from the Jurassic and Cretaceous source rocks or crude oils from the Cretaceous, the source and commingling features of the Tertiary crude oils of Well Pai 2 and Well Pai 8 were investigated. The proportion of the two sources in the mixed crude oils was estimated, and the hydrocarbon accumulation pattern of reservoirs in the study area was established. 展开更多
关键词 准噶尔盆地 原油特征 中国西北 轻质原油 隆起 原油地球化学特征 碳同位素组成 煤系烃源岩
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Game Analysis and Countermeasures Discussion on Green Marketing
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作者 LI Geng 《Asian Agricultural Research》 2011年第7期5-9,共5页
On the basis of making certain assumption on the game situation of carrying out green marketing, this paper conducts game analysis on the green marketing choice among enterprises, the green marketing choice between en... On the basis of making certain assumption on the game situation of carrying out green marketing, this paper conducts game analysis on the green marketing choice among enterprises, the green marketing choice between enterprises and consumers, and the green marketing choice of consumers. Then this paper expounds the necessity of implementing green marketing as follows: the green marketing is the inevitable requirements of sustainable development of economy; the green marketing is the inevitable choice of green consumption mode; the green marketing is the inevitable results of legalization of environmental problems. The problems faced by the implementation of green marketing are analyzed as follows: first, the concept of green marketing has not yet been established; second, the sociality of green demand has not yet taken shape; third, production characteristic of green products has not yet formed. The countermeasures of implementing green marketing as follows: pay attention to the propaganda and education of modern marketing concept; regulate the competition in the market of green products; strengthen transparency of green market information; reinforce the legislation work of food safety. 展开更多
关键词 Green marketing GAME COUNTERMEASURES China
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Survey on Resistance Emotion of NCMS in Information Asymmetry and Countermeasures
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作者 ZHAO Lu-gui CHEN Lu-qing 《Asian Agricultural Research》 2011年第10期22-25,共4页
Through survey on current situation of NCMS construction in Guangxi, we analyze deep reasons for farmers' resistance to NCMS. Major reasons include inadequate propaganda and training effort; narrow compensation sc... Through survey on current situation of NCMS construction in Guangxi, we analyze deep reasons for farmers' resistance to NCMS. Major reasons include inadequate propaganda and training effort; narrow compensation scope influencing institutional functions; unreasonable reimbursement mechanism; low level of informatization management; imperfect supervision mechanism; and imperfect laws and regulations. In these situations, we put forward following countermeasures and suggestions: enhance training to ensure working efficiency; expand compensation scope to raise security level; adjust compensation standard to raise reimbursement proportion; lift level of informatization management to reduce costs for institutional operation; strengthen organizational construction to reinforce fund management; open up fund-raising channels to perfect legal system. 展开更多
关键词 Information asymmetry NCMS Resistance emotion Adjustment countermeasures China
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Evaluation for Innovation Ability of National Agricultural Science and Technology Parks in Jiangxi Province
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作者 Jun Yang Ling Lin +1 位作者 Can Huang Xin Feng 《American Journal of Plant Sciences》 2018年第12期2446-2461,共16页
Innovative ability is an important indicator for judging the effectiveness of the national agricultural science and technology park construction. Based on the statistical data of four national agricultural science and... Innovative ability is an important indicator for judging the effectiveness of the national agricultural science and technology park construction. Based on the statistical data of four national agricultural science and technology parks built in Jiangxi Province, this paper constructs an evaluation system consisting of three first-level indicators, eight second-level indicators and 24 three-level indicators. Based on the combined weighting method, the comprehensive scores of the innovation capabilities of the parks are obtained. It is found that the gap in innovation capability of each park is wide, and the radiation-driven function has not yet appeared. It is necessary to promote the improvement of innovation capabilities by promoting the synergy and innovation of agricultural science and technology in the park, encouraging the park to construct agricultural technology business incubators, and building and improving innovation platforms. 展开更多
关键词 National AGRICULTURAL Science and Technology PARK INNOVATION ABILITY EVALUATION Index System
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Pathway-dependency of Chinese Financial System Transition and Financing Difficulties of Private Business
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作者 Kaihui Chen Jie Luo 《Chinese Business Review》 2003年第1期35-39,共5页
Under the present situation of dramatic change of the national income distribution pattern, the dominant economy of our progressive reform has made a rapid change from the past government-direct-financing type to the ... Under the present situation of dramatic change of the national income distribution pattern, the dominant economy of our progressive reform has made a rapid change from the past government-direct-financing type to the present bank-indirect-financing type. In order to replace the function of government- investment in the state-owned economy, the direct and indirect financing channel of the process of our financial system transition has an obvious preference for its ownership system, and the small and medium-sized financial institutions matching with private business are in a weak state due to the constraints of system supply, these two factors result in the extreme asymmetric between the financial structure and economical structure. A major part of the financial resources are invested in those inefficient state-owned business, which involve the Private business into a difficult position of financing, and the whole financial system transition moves towards the factual pathway-dependency due to the system defect, accordingly the finance resources allocation enter into a system lock state with rather low efficiency, so it calls for some related system innovation to correct its pathway derivation. 展开更多
关键词 financial system transition pathway dependency difficult situation of financing
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Analysis on the exchange rate of Australian dollar
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作者 JIA Xian-wei 《Journal of Modern Accounting and Auditing》 2010年第6期44-50,共7页
Australian dollar (AUD) maintains a fluctuant increase for long period, but in recent two years, this currency represents an anomalistic change. In order to forecast the trend of AUD, this essay examines the exchang... Australian dollar (AUD) maintains a fluctuant increase for long period, but in recent two years, this currency represents an anomalistic change. In order to forecast the trend of AUD, this essay examines the exchange rate of AUD in then years from March of 2000 to March of 2010, and argues the factors which create these trend changes. By means of secondary research and graphs analysis, the relevant evidence and argument was selected into four terms below: relative raw materials prices changes, relative domestic price level and Import-Expert changes, relative interest rate changes, and other factors. The examples based on the theoretics, graphs, statistics and experts' opinions. 展开更多
关键词 real exchange rate nominal exchange rate Australian dollar (AUD)
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Technological Innovation Collaboration Network Evolution Simulation and Empirical Research
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作者 Yu Wenlong 《International Journal of Technology Management》 2013年第8期138-141,共4页
The technology innovation cooperation relationship of enterprises has evolved into the representation of complicated network. MATLAB software is used for computer simulation on network evolution process of technology ... The technology innovation cooperation relationship of enterprises has evolved into the representation of complicated network. MATLAB software is used for computer simulation on network evolution process of technology innovation cooperation, and Ucinet characterization analysis software is used to compute characteristic values of simulation network such as power law index of network, average route length and accumulation coefficients. It is compared with the actual network, and the simulation results are analyzed to verify the rationality of the constructed evolution model. 展开更多
关键词 technological innovation network evolution SIMULATION
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Market Structure and Competitive Strategy in Market Square
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作者 PENG Juanjuan 《宿州学院学报》 2007年第3期41-42,157,共3页
Market Square shopping center contains several restaurants and cafés providing a diverse range of Asian foods and delicacies and this area is known by locals and Griffith University students as a great location ... Market Square shopping center contains several restaurants and cafés providing a diverse range of Asian foods and delicacies and this area is known by locals and Griffith University students as a great location for‘eating out'.Then,what is the market structure in this shopping mall and what kind of competitive strategies should be used to maximize profits according to the characteristics in this shopping center? 展开更多
关键词 食品 产品质量 市场经济 市场竞争
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The Analysis of Logistics Strategic Type of Northeastern Equipment Manufacture Industry
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作者 Xueliang Pei Zhonghua Zhao 《Chinese Business Review》 2006年第4期32-33,41,共3页
Logistics strategy has very important function to the development of old industrial base of equipment manufacture industry in the northeast, logistics strategic type is an important component of logistics strategy. Th... Logistics strategy has very important function to the development of old industrial base of equipment manufacture industry in the northeast, logistics strategic type is an important component of logistics strategy. The understanding of it will contributes to enterprise make suitable logistics strategy according to one's own actual conditions, to plan long-term development, and then establish an unassailable position during keen competition nowadays. 展开更多
关键词 equipment manufacture industry logistics strategy type
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Computational Unified Set Theory and Application
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作者 Zhang Jiang Li Xuewei He Zhongxiong 《工程科学(英文版)》 2006年第1期72-84,共13页
The computational unified set model (CUSM) as the latest progress of Unified Set theory is introduced in this paper. The model combines unified set theory, information granule, complex adaptive system and cognitive sc... The computational unified set model (CUSM) as the latest progress of Unified Set theory is introduced in this paper. The model combines unified set theory, information granule, complex adaptive system and cognitive science to present a new approach to simulate the cognition of human beings that can be viewed as the evolutionary process through the automatic learning from data sets. The information granule, which is the unit of cognition in CUSM, can be synthesized and created by the basic operators. It also can form the granule network by linking with other granules. With the learning from database, the system can evolve under the pressure of selection. As the adaptive results, fuzzy sets, vague sets and rough sets, etc can emerge out spontaneously. The CUSM answers the question of the origin of the uncertainties in thinking process described by unified set theory, that is due to the emergent properties of a holistic system of multiple cognitive units. And also the CUSM creates a dynamic model that can adapt to the environment. As a result, the “closed world” limitation in machine learning may be broken. The paper also discusses the applications of CUSM in rules discovery, problem solving, clustering analysis and data mining etc. The main features of the model comparing with the classical approaches toward those problems are its adaptability, flexibility and robustness but not accuracy. 展开更多
关键词 计算统一集合论 复合自适应系统 认知系统 计算模型
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Assessment of Operational Performance in a Power Generation/Selling Integrated Company Using a Dynamic Proportional Adjustment Coefficient
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作者 Jingbin Wu Hongming Yang Sheng Xiang 《Energy Engineering》 EI 2024年第11期3263-3287,共25页
Currently,the operational performance assessment system in the power market primarily focuses on power generation and electricity retail companies,lacking a system tailored to the operational characteristics of power ... Currently,the operational performance assessment system in the power market primarily focuses on power generation and electricity retail companies,lacking a system tailored to the operational characteristics of power generation/selling integrated companies.Therefore,this article proposes an assessment index system for assessing the operational performance of a power generation/selling integrated company,encompassing three dimensions:basic capacity,development potential,and external environment.A dynamic proportional adjustment coefficient is designed,along with a subjective and objective weighting model for assessment indexes based on a combined weightingmethod.Subsequently,the operational performance of an integrated company is assessed using extension theory.The results in the case study demonstrate the feasibility and effectiveness of the proposed dynamic proportional adjustment coefficient. 展开更多
关键词 Power generation/selling integrated company dynamic proportional adjustment coefficient combined weighting extension theory assessment of operational performance
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Empirical Study and Model Construction on the Efficiency of the Different Urban Elderly Care Modes Based on Complex Scientific Management
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作者 JIANG Juncheng LU Yuanjia CHEN Xianyou 《Wuhan University Journal of Natural Sciences》 CAS CSCD 2020年第1期33-51,共19页
For the problem of improving the efficiency and optimizing the resource allocation in urban elderly care,by using complex scientific management method and the empirical analysis on the efficiency of the urban elderly ... For the problem of improving the efficiency and optimizing the resource allocation in urban elderly care,by using complex scientific management method and the empirical analysis on the efficiency of the urban elderly care modes,this paper proposes that the key is to balance supply efficiency between the long-term and short-term elderly care modes.The short-term pattern is to enhance urban residents’confidence,and the long-term one promotes the sustainable development of the elderly care to prevent the aged poverty due to oldness and illness.This paper suggests that the building of"government assistance+community leadership+enterprise cultivation"mode can improve the overall efficiency of the urban elderly care to reach the Pareto optima,and fulfil the goals of the urban elderly care by providing a security and enjoyable life. 展开更多
关键词 URBAN ELDERLY care model comparison SUPPLIERS EFFICIENCY BALANCE
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Signed PageRank on Online Rating Systems 被引量:4
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作者 GU Ke FAN Ying DI Zengru 《Journal of Systems Science & Complexity》 SCIE EI CSCD 2022年第1期58-80,共23页
The ratings in many user-object online rating systems can reflect whether users like or dislike the objects,and in some online rating systems,users can directly choose whether to like an object.So these systems can be... The ratings in many user-object online rating systems can reflect whether users like or dislike the objects,and in some online rating systems,users can directly choose whether to like an object.So these systems can be represented by signed bipartite networks,but the original unsigned node evaluation algorithm cannot be directly used on the signed networks.This paper proposes the Signed Page Rank algorithm for signed bipartite networks to evaluate the object and user nodes at the same time.Based on the global information,the nodes can be sorted by the Signed Page Rank values in descending order,and the result is SR Ranking.The authors analyze the characteristics of top and bottom nodes of the real networks and find out that for objects,the SR Ranking can provide a more reasonable ranking which combines the degree and rating of node,and the algorithm also can help us to identify users with specific rating patterns.By discussing the location of negative edges and the sensitivity of object SR Ranking to negative edges,the authors also explore that the negative edges play an important role in the algorithm and explain that why the bad reviews are more important in real networks. 展开更多
关键词 Negative edges node evaluation online rating systems signed Page Rank
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The Influence of Third-party E-Commerce Platform Price Limits on the Dual-Channel Strategy of Manufacturers 被引量:2
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作者 Cong WANG Huifang YANG Deli YANG 《Journal of Systems Science and Information》 CSCD 2019年第2期173-186,共14页
Powerful platform operators always set price limits for sellers on the platform. This paper establishes Stackelberg game models according to two pricing models when the manufacturer enters the third-party e-commerce p... Powerful platform operators always set price limits for sellers on the platform. This paper establishes Stackelberg game models according to two pricing models when the manufacturer enters the third-party e-commerce platform and sells products online. The first is a seller-pricing model in which the manufacturer decides the online price. The second is a platform-pricing model in which the platform decides the online price. We obtain the equilibrium results for these two models and the condition that allows the manufacturer to adopt the dual-channel strategy by comparing the operation decisions and performance of supply-chain members in the two models. Results show that the dual-channel strategy of the manufacturer always decreases the profit of the traditional retailer. In comparison with the sellerpricing model, the platform-pricing model always erodes parts of the manufacturers profit obtained by the dual-channel strategy. The manufacturer will pass on the partial loss to the retailer using relative leadership in the platform-pricing model, which renders the profit of the retailer lower than that in the seller-pricing model. Also, price limits do not always bring the platform more profits;sometimes the platform is forced to set a low price. 展开更多
关键词 third-party platform PRICE CAP the MANUFACTURER DUAL-CHANNEL STRATEGY
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Unconventional dual-vacancies in nickel diselenide-graphene nanocomposite for high-efficiency oxygen evolution catalysis 被引量:3
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作者 Pengkun Wei Zewei Hao +4 位作者 Yang Yang Mingyang Liu Haijun Zhang Min-Rui Gao Shu-Hong Yu 《Nano Research》 SCIE EI CAS CSCD 2020年第12期3292-3298,共7页
Although nickel-based catalysts display good catalytic capability and excellent corrosion resistance under alkaline electrolytes for water splitting,it is still imperative to enhance their activity for real device app... Although nickel-based catalysts display good catalytic capability and excellent corrosion resistance under alkaline electrolytes for water splitting,it is still imperative to enhance their activity for real device applications.Herein,we decorated Ni0.85Se hollow nanospheres onto reduced graphene oxide(RGO)through a hydrothermal route,then annealed this composite at different temperatures(400℃,NiSe2-400 and 450℃,NiSe2-450)under argon atmosphere,yielding a kind of NiSe2/RGO composite catalysts.Positron annihilation spectra revealed two types of vacancies formed in this composite catalyst.We found that the NiSe2-400 catalyst with dual Ni-Se vacancies is able to catalyze the oxygen evolution reaction(OER)efficiently,needing a mere 241 mV overpotential at 10 mA·cm−2.In addition,this catalyst exhibits outstanding stability.Computational studies show favorable energy barrier on NiSe2-400,enabling moderate OH−adsorption and O2 desorption,which leads to the enhanced energetics for OER. 展开更多
关键词 hollow nanospheres NiSe2 oxygen evolution reaction dual-vacancies
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