期刊文献+
共找到7,398篇文章
< 1 2 250 >
每页显示 20 50 100
ON THE SINGULAR DIRECTIONS OF VALUE DISTRIBUTION OF HOLOMORPHIC CURVES IN P^n(C) 被引量:2
1
作者 涂振汉 李平丽 《Acta Mathematica Scientia》 SCIE CSCD 2006年第4期702-710,共9页
This article proves the existence of singular directions of value distribution theory for some transcendental holomorphic curves in the n-dimensional complex projective space P^n(C).. An example is given to compleme... This article proves the existence of singular directions of value distribution theory for some transcendental holomorphic curves in the n-dimensional complex projective space P^n(C).. An example is given to complement these results. 展开更多
关键词 Complex projective spaces holomorphic mappings normal families singular directions and value distribution theory
下载PDF
Catalytic conversion of CO_2 to value added fuels: Current status, challenges, and future directions 被引量:3
2
作者 Jingjie Wu Xiao-Dong Zhou 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2016年第7期999-1015,共17页
The electrochemical reduction of C02 into liquid fuels especially coupling with the intermittent renewable electricity offers a promising means of storing electricity in chemical form, which reduces the dependence on ... The electrochemical reduction of C02 into liquid fuels especially coupling with the intermittent renewable electricity offers a promising means of storing electricity in chemical form, which reduces the dependence on fossil fuels and mitigates the negative impact of anthropogenic C02 emissions on the planet. Although converting CO2 to fuels is not in itself a new concept, the field has not sub- stantially advanced in the last 30 years primarily because of the challenge of discovery of structural electrocatalysts and the development of membrane architectures for efficient collection of reactants and separation of products. This overview summarizes recent advances in catalytic conversion of CO2 and presents the challenges and future directions in producing value-added fuels. 展开更多
关键词 value added fuelsElectrocatalystsCatalytic conversionCarbon dioxideDurability
下载PDF
On the Distributive Justice of Land Added Value in the Process of Urban Expansion
3
作者 Zeyi ZHANG 《Asian Agricultural Research》 2014年第5期55-59,共5页
It is an unarguable fact that the urban-rural dual structure led to two different results. On the one hand,it had been playing a great role in the city development and prosperity,and on the other hand,it had led the s... It is an unarguable fact that the urban-rural dual structure led to two different results. On the one hand,it had been playing a great role in the city development and prosperity,and on the other hand,it had led the slow development of rural economy and the income gap between rural and urban areas. The government makes efforts to promote the process of urbanization to maintain the sustained development of China's economy and economic transformation which are the two needs of the Chinese reality. But in the top-level design of the policy,the government did not give a fair profits distribution to all social groups. On the contrary,the result of urban development is based on the expense of a part of the people's interests in exchange for the interests of another parts of the people,and especially on the government expropriation in the process of urban expansion. Under Land Administration Law of the People's Republic of China,the government monopolized the expropriation right of the rural land,and the rural collectives and farmers as the land owner and constructors respectively have no rights to decide the land use purposes. In fact,they are forced to accept the land compensation,and because of the little bargaining rights,they gain little from the land value increment. Comparatively,the governments became the biggest beneficiary who made use of the land as a source and capital to earn the achievement in their official career and more money required by the urban development. The paper mainly analyzes the current situation of the distribution of the land added value,elaborates the reasons why the government strives for the land interests,and discusses what farmers lose in the government expropriation. Last but not lest,the author reflects on the land reform and gives a proposal on distribution of land added value. 展开更多
关键词 LAND added value DISTRIBUTIVE JUSTICE URBAN Expans
下载PDF
A Study On the Value and Direction of Yancheng Sea Salt Culture in College Students’Ideological and Political Education
4
作者 GU Ren-kai WANG Jing-lin +1 位作者 WANG Jun-wen HE Deng-yi 《Journal of Literature and Art Studies》 2018年第11期1576-1580,共5页
Sea Salt Culture is the crystallization of the wisdom of the ancestors and the retention of the history.With the passage of time and the innovation of salt making technology,the connotation of sea salt culture is unde... Sea Salt Culture is the crystallization of the wisdom of the ancestors and the retention of the history.With the passage of time and the innovation of salt making technology,the connotation of sea salt culture is undergoing changes.In the long process of cultural dissemination,sea salt culture permeates local university campuses and enlightens college students as well.This paper explores the profound connotation of sea salt culture in the new era,probes into the important influence of Sea Salt Culture on the ideological and political education of contemporary college students,and analyzes the practical direction for college students to inherit sea salt culture in the new period,so as to expand the breadth and width of sea salt culture. 展开更多
关键词 SEA SALT CULTURE students’ideas connotations value direction
下载PDF
Value of Repeated Direct Smear Sputum Examination in the Diagnosis of Pulmonary Tuberculosis
5
作者 Wafaa Ali Hassan Amany Omar +1 位作者 Saher Khalil Atef Farouk Al-Qarn 《Open Journal of Respiratory Diseases》 2014年第2期41-47,共7页
Introduction: The examination of three sputum samples per suspect has been severely criticized from a public health viewpoint and several recent trials have documented the relative inefficiency of the third smear and ... Introduction: The examination of three sputum samples per suspect has been severely criticized from a public health viewpoint and several recent trials have documented the relative inefficiency of the third smear and the necessity for confirmation of a positive smear has also been contested. Aim: This study, undertaken in Qena, Egypt, aimed to determine the usefulness of examining the second and third direct smear microscopy (DSM) specimen in the diagnosis of pulmonary TB. Patients and methods: A retrospective study using record review at TB outpatient clinic;Qena Chest Hospital, Egypt, was done from 2010-2013. Direct smear results were collected as one of the following combinations PNN, PPP, PPN, PNP, NNP, NPP, and NPN, NNN, where N is a negative and P a positive smear. The proportion of positive, first, second and third specimen were calculated. Cases were considered positive having at least one positive smear confirmed by another positive one in the absence of sputum culture. Results: Out of 9420 recorded suspects, 719 of them were positive, so smear positivity was 7.6%. The majority of them were diagnosed from the first sample (96.4%). For only 3.6% (26 of 719), the second smear was positive and a third specimen was required (NPP) to make a definitive diagnosis of TB. No recorded isolated positive or negative smears in the third sample (NNP or PPN). Conclusions: These data indicated that, in our locality with limited financial resources, the incremental yield of a second sputum direct smear examination was low, and the third one was negligible indicating that examination of two sputum samples is enough among pulmonary TB patients. A third sample is required only as confirmatory if the second sample was positive. Smear microscopy can be substantially simplified with favourable resource implications. 展开更多
关键词 TB direct SMEAR value
下载PDF
Assessment of Direct Eco-value of Liangzi Lake
6
作者 封瑛 李兆华 刘化吉 《Agricultural Science & Technology》 CAS 2013年第6期882-885,共4页
[Obective] This study amied to evaluate the direct usage value of Liangzi Lake, like plants and animal resources and water storage value. [Method] It was measured through the market value method. The physical environm... [Obective] This study amied to evaluate the direct usage value of Liangzi Lake, like plants and animal resources and water storage value. [Method] It was measured through the market value method. The physical environment was introduced and the productivity of the lake was investigated both through the literature materials and the investigations. The market value method was clarified in this paper as well as its operation process and the application fields. [Result] Based on the introduction of the current situation in Liangzi Lake, the direct usage value was estimated as 1.32 billion Yuan/year. Plant resources value was 318 million Yuan/year; animal resources value was 675 million Yuan/year; and water storage value was 325 million Yuan/year for the three parts. [Conclusion] This paper will attract more attention to the emphasis of the reasonable development of nature sources. 展开更多
关键词 Valuation assessment direct usage value Market value method Liangzi Lake
下载PDF
On a Fixed Value Theorem for Directed Areas in Conic Circumscribed Polygons and Applications 被引量:2
7
作者 YU De-sheng 《Chinese Quarterly Journal of Mathematics》 CSCD 2009年第4期485-490,共6页
Using polar equations for conic sections, we research conic circumscribed n-sided polygons(n ≥ 4) deeply on the basis of papers[1-3]. We obtain a general fixed value theorem for directed areas of some triangles in ... Using polar equations for conic sections, we research conic circumscribed n-sided polygons(n ≥ 4) deeply on the basis of papers[1-3]. We obtain a general fixed value theorem for directed areas of some triangles in conic circumscribed n-sided polygons and derive as many as n(n - 3) concurrent points of three lines and some other collinear, equiareal results in conic circumscribed n-sided polygons(n ≥ 4). So the results of papers[1-3] are unified. 展开更多
关键词 conic circumscribed polygon directed) area fixed value CONCURRENT COLLINEAR
下载PDF
UNIQUENESS OF MEROMORPHIC FUNCTIONS WHOSE NONLINEAR DIFFERENTIAL POLYNOMIALS SHARE ONE VALUE OR HAVE THE SAME FIXED POINTS IN AN ANGULAR DOMAIN 被引量:1
8
作者 李效敏 仪洪勋 《Acta Mathematica Scientia》 SCIE CSCD 2014年第3期593-609,共17页
In this article, we study the uniqueness question of nonconstant meromorphic functions whose nonlinear differential polynomials share 1 or have the same fixed points in an angular domain. The results in this article i... In this article, we study the uniqueness question of nonconstant meromorphic functions whose nonlinear differential polynomials share 1 or have the same fixed points in an angular domain. The results in this article improve Theorem 1 of Yang and Hua [26], and improve Theorem 1 of Fang and Qiu [6]. 展开更多
关键词 Meromorphic functions shared values singular directions uniqueness theo-reins in the angular domain
下载PDF
Does the EVA valuation model explain the market value of equity better under changing required return than constant required return? 被引量:3
9
作者 Sujata Behera 《Financial Innovation》 2020年第1期149-172,共24页
Through the Economic-Value-Added(EVA)valuation model,the expected market value of equity can be determined by adding the book value of equity with the present value of expected EVAs under the assumption of constant re... Through the Economic-Value-Added(EVA)valuation model,the expected market value of equity can be determined by adding the book value of equity with the present value of expected EVAs under the assumption of constant required return and constant return on equity.The equation of EVA valuation model has taken its shape under the assumption of constant required return and constant return on equity.However,a large body of empirical evidence indicates that required rate of return never remain constant.The EVA-valuation model formulated under constant required return cannot be implemented under the scenario of changing required return.In this study,we explored whether the EVA valuation model could be implemented under changing required return by making any changes in the model and found that it could be implemented under the scenario of changing required return by replacing the book value of the equity of the existing model with the present value of required earnings or normal market earnings.We further examined whether the explanatory ability of the EVA valuation model under the assumption of changing required return is better than that of the valuation model under the assumption of constant required return.Relative information content analyses were conducted by considering sample of the intrinsic value of equities determined by valuation models and the market value of equities of 69 large-cap,88 mid-cap,and 79 small-cap companies.The results showed that the EVA-based valuation model with changing normal market return outperformed the EVA-based valuation model with constant required return. 展开更多
关键词 Economic value added(EVA) Capital asset pricing model(CAPM) Expected market value of equity under constant required return(EMVEUCRR) Expected market value of equity under varying required return(EMVEUVRR)
下载PDF
Effect of corporate social responsibility on creation of added value 被引量:2
10
作者 FANG Xiao-zhi YANG Chun-qing YU Jun 《Ecological Economy》 2016年第4期376-383,共8页
In the process of financial management and operation, a firm should not only aim to maximize its shareholders' benefits, but also consider the interests of all stakeholders. Bearing social responsibility to each s... In the process of financial management and operation, a firm should not only aim to maximize its shareholders' benefits, but also consider the interests of all stakeholders. Bearing social responsibility to each stakeholder to a certain extent and pursuing harmonious social development are fully consistent with the concept of China's building a harmonious socialist society. Furthermore, added value also reflects the idea of social responsibility Based on the relational contract theory, the paper divides stakeholders into staff and shareholders under relational contracts, creditors, suppliers and consumers under transactional contracts and governments and communities under special contracts. The paper details the effect mechanism of a firm's bearing social responsibilities to each stakeholder on the creation of added value respectively, and considers that corporate social responsibilities should be included in the system for creating added value to theoretically support firm managers to fulfill social responsibilities. 展开更多
关键词 corporate social responsibilities added value effect mechanism
下载PDF
Integration of Individualized Management Systems (MSs) as an Aggregating Factor of Sustainable Value for Organizations An Overview Through a Review of the Literature 被引量:1
11
作者 Manuel Ferreira Rebelo Gilberto Santos Rui Silva 《Journal of Modern Accounting and Auditing》 2014年第3期356-383,共28页
Nowadays, there exist various standards for individual management systems (MSs), at least, one for each stakeholder. New ones will be published. An integrated management system (IMS) aims to integrate some or all ... Nowadays, there exist various standards for individual management systems (MSs), at least, one for each stakeholder. New ones will be published. An integrated management system (IMS) aims to integrate some or all components of the business into one coherent and efficient MS. Maximizing integration is more and more a strategic priority in that it constitutes an opportunity to eliminate and/or reduce potential factors of destruction of value for the organizations and also to be more competitive and consequently promote its sustainable success. A preliminary investigation was conducted on a Portuguese industrial company which, over the years, has been adopting gradually, in whole or in part, individualized management system standards (MSSs). A research, through a questionnaire, was performed with the objective to develop, in a real business environment, an adequate and efficient IMS-QES (quality, environment, and safety) model and to potentiate for the future a generic IMS model to integrate other MSSs. The strategy and research methods have taken into consideration the case study. It was obtained a set of relevant conclusions resulting from the statistical analyses of the responses to the survey. Globally, the investigation results, by themselves, justified and prioritized the conception of a model of development of the IMS-QES and consequent definition and validation of a structure of an IMS-QES model, to be implemented at the small- and medium-sized enterprise (SME) where the investigation was conducted. 展开更多
关键词 integrated management system (IMS) quality management system (QMS) environmental managementsystem (EMS) occupational health and safety management system (OHSMS) sustainable business added value
下载PDF
Characterization of Finfish Hatchery Waste for Value Added Product
12
作者 Sujjat Al Azad Mohammad Tamrin Bin Mohamad Lal Al-Najib Bin Benjamin 《Advances in Bioscience and Biotechnology》 2020年第3期73-79,共7页
Commercial fish hatchery generates waste both organic and inorganic;the sources are primarily from uneaten food and fish feces. Conventional methods of treating hatchery wastes will increase the operating cost and bec... Commercial fish hatchery generates waste both organic and inorganic;the sources are primarily from uneaten food and fish feces. Conventional methods of treating hatchery wastes will increase the operating cost and become extra burden in production. It is necessary to develop a new research application of this nonconventional resource and reduce the negative impacts of hatchery waste on the environment. The whole project is to utilize hatchery waste through bioprocess for probiotic fortified live feed production. In this study, the chemical composition of hatchery waste was determined to understand the suitability waste to get value-added derived products through bioprocess. Composite samples were collected everyday and dried in an oven at a temperature of 65°C until complete dryness. Dried samples were mixed well and grinded into fine powder. The analytical parameters like total solids, ammonium nitrogen, nitrite, nitrate and phosphate were determined from the freshly collected samples. Total nitrogen, total phosphorus and total potassium were determined from the dry samples. Total solids, ammonium nitrogen, nitrite, nitrate and phosphate-phosphorus were observed in the ranged from 75 - 82 mg/L, 0.25 - 8.5 mg/L, 0.05 - 1.9 mg/L, 0.04 - 6.7 mg/L and 4.1 - 16.7 mg/L respectively. On the other hand, the mean content of 3.75% total nitrogen, 1.80% total phosphorus and 0.15% potassium were determined in dry hatchery wastes. The analytical parameters are useful and demonstrate that the nutrients in both fresh and dry waste will be supportive for the growth of microbes in the bioprocess system. 展开更多
关键词 HATCHERY WASTE Nutrients BIOPROCESS MICROBE and value added PRODUCT
下载PDF
Global Development of Mobile Value Added Services
13
作者 Li Shan (China Academy of Telecommunications Research of Mll, Beijing 100083, China) 《ZTE Communications》 2005年第4期2-5,共4页
With the increasing demand for VAS from the subscribers, mobile operators are making efforts to create more services to promote the continuous development of the non-voice service application. The following three mobi... With the increasing demand for VAS from the subscribers, mobile operators are making efforts to create more services to promote the continuous development of the non-voice service application. The following three mobile VASes are becoming the development focus of operators. 展开更多
关键词 In Global Development of Mobile value added Services VAS UMTS SMS
下载PDF
Importance Analysis of a Multi-state System Based on Direct Partial Logic Derivatives and Multi-valued Decision Diagrams 被引量:1
14
作者 古莹奎 李晶 《Journal of Donghua University(English Edition)》 EI CAS 2014年第6期789-792,共4页
Importance analysis quantifies the critical degree of individual component. Compared with the traditional binary state system,importance analysis of the multi-state system is more aligned with the practice. Because th... Importance analysis quantifies the critical degree of individual component. Compared with the traditional binary state system,importance analysis of the multi-state system is more aligned with the practice. Because the multi-valued decision diagram( MDD) can reflect the relationship between the components and the system state bilaterally, it was introduced into the reliability calculation of the multi-state system( MSS). The building method,simplified criteria,and path search and probability algorithm of MSS structure function MDD were given,and the reliability of the system was calculated. The computing methods of importance based on MDD and direct partial logic derivatives( DPLD) were presented. The diesel engine fuel supply system was taken as an example to illustrate the proposed method. The results show that not only the probability of the system in each state can be easily obtained,but also the influence degree of each component and its state on the system reliability can be obtained,which is conducive to the condition monitoring and structure optimization of the system. 展开更多
关键词 multi-state system(MSS) importance analysis reliability multi-valued decision diagram(MDD) direct partial logic derivative(DPLD) diesel engine fuel supply system
下载PDF
Study on Value Added Mechanism of Human Capital of Innovative Group
15
作者 Hong Qing 《学术界》 CSSCI 北大核心 2016年第5期286-290,共5页
Innovation group is the subject of innovation activities,to promote the increment of human capital group innovation,contribute to more,better innovation,create more benefits and wealth for enterprises,organizations an... Innovation group is the subject of innovation activities,to promote the increment of human capital group innovation,contribute to more,better innovation,create more benefits and wealth for enterprises,organizations and the whole society.In the value-added mechanism,human capital value from an accretion and symbiotic value.Establish training mechanism and incentive mechanism to promote a health and value based human capital value,improve the communication mechanism and operation mechanism to promote symbiosis value-added based human capital value,is to strengthen the team effect,an important way to promote the increment of human capital group innovation. 展开更多
关键词 人力资本 激励机制 创新型 资本增值 资本价值 运行机制 新活动 共生
下载PDF
Research Progress of Foreign Direct Investment and Global Value Chain Status
16
作者 Hongyu ZHAO 《Asian Agricultural Research》 2022年第7期22-25,共4页
With the rapid development of globalization,the industries of various countries are actively seeking the best way to improve the global value chain(GVC)status while integrating into the world.As an important factor af... With the rapid development of globalization,the industries of various countries are actively seeking the best way to improve the global value chain(GVC)status while integrating into the world.As an important factor affecting the GVC status,foreign direct investment(FDI)has attracted extensive attention from scholars.On the basis of systematically summarizing the research progress of FDI theory,GVC status and the influence of FDI on GVC status,the paper tries to clarify the internal relationship between FDI and GVC status,explores the shortcomings of existing research,and puts forward the possible direction of future research. 展开更多
关键词 Foreign direct investment(FDI) Manufacturing industry Global value chain(GVC)status
下载PDF
Value-Added Trade and Evolution of China's Comparative Advantages
17
作者 Wen Dongwei 《China Economist》 2018年第2期40-53,共14页
Based on heterogeneity in firm's sales destinations and trade patterns, this paper estimates China's ratio of value-added exports(RVAE) using value-added trade accounting, and discusses the evolution of China&... Based on heterogeneity in firm's sales destinations and trade patterns, this paper estimates China's ratio of value-added exports(RVAE) using value-added trade accounting, and discusses the evolution of China's comparative advantages from the perspective of value-added trade. Our research findings suggest that without taking into account heterogeneity in firm's sales destinations and trade patterns,China's RVAE will be overestimated. Conventional gross trade accounting underestimates the export competitiveness of China's labor-intensive and capital intensive sectors, but overestimates the export competitiveness of China's technology-intensive sectors,which leads to a significant reversal of comparative advantages. Conventional gross trade accounting method overestimates the trade surplus of China's manufacturing and technology-intensive sectors with the US by about 60% and 85% respectively. 展开更多
关键词 trade in value added comparative advantage heterogeneous firms intercountry input-output tables(ICIO) global value chains(GVC)
下载PDF
Empirical Analysis on Performance Evaluation of A Pharmaceutical Company Based on Economic Value Added
18
作者 Li Meng Huang Zhe 《Asian Journal of Social Pharmacy》 2021年第2期154-162,共9页
Objective To establish an economic value added(EVA)performance evaluation system to maintain the competitiveness of pharmaceutical company A under the environment of fierce competition in the pharmaceutical industry.M... Objective To establish an economic value added(EVA)performance evaluation system to maintain the competitiveness of pharmaceutical company A under the environment of fierce competition in the pharmaceutical industry.Methods An EVA performance evaluation model was established by adjusting the items of EVA performance evaluation index,such as after-tax profits,total invested capital and weighted average cost of capital rate.Results and Conclusion EVA values of pharmaceutical company A from 2014 to 2018 were calculated and compared with the traditional performance evaluation method,it was found that EVA performance evaluation model reflected the real performance of pharmaceutical company A.Therefore,pharmaceutical company A is doing well,but its growth rate is unstable. 展开更多
关键词 economic value added(EVA) pharmaceutical company A performance evaluation
下载PDF
Value of direct vision internal urethrotomy in treatment of urethral stricture-twenty-year clinical experience
19
作者 张炯 《外科研究与新技术》 2011年第4期254-254,共1页
Objective To summarize the experience and evaluate the efficacy of treatment of urethral stricture using direct visual internal urethrotomy ( DVIU) . Methods The clinical data of 361 patients ( age range 16 - 72 years... Objective To summarize the experience and evaluate the efficacy of treatment of urethral stricture using direct visual internal urethrotomy ( DVIU) . Methods The clinical data of 361 patients ( age range 16 - 72 years, mean age 38 years) with urethral stricture who underwent urethrotomy from 1990 to 2010 was retrospectively ana- 展开更多
关键词 LENGTH THAN value of direct vision internal urethrotomy in treatment of urethral stricture-twenty-year clinical experience
下载PDF
Operational mechanism of comprehensive benefit evaluation of existing building energy efficient renovation project based on value-added life
20
作者 GUO Han-ding WEI Yong-cheng +1 位作者 CUI Si-wen ZHANG Yin-xian 《Ecological Economy》 2019年第4期280-288,共9页
The comprehensive benefit evaluation of the existing building energy efficient renovation project cannot be separated from the scientific and effective evaluation mechanism.Based on the value-added life perspective,th... The comprehensive benefit evaluation of the existing building energy efficient renovation project cannot be separated from the scientific and effective evaluation mechanism.Based on the value-added life perspective,this paper analyzes the implementation subject,standard,system and principle of the comprehensive benefit evaluation of the existing building energy efficient renovation project.It plans the process of comprehensive benefit evaluation,and builds a scientific and reasonable operation platform of evaluation system,with a view to promoting the effective implementation of the comprehensive benefit evaluation of existing building energy-saving retrofits. 展开更多
关键词 energy efficient RENOVATION existing building value-added LIFE COMPREHENSIVE BENEFIT evaluation OPERATIONAL mechanism
下载PDF
上一页 1 2 250 下一页 到第
使用帮助 返回顶部