期刊文献+
共找到2,889篇文章
< 1 2 145 >
每页显示 20 50 100
Research on the Impact of Digital Transformation on the Performance of Manufacturing Enterprises
1
作者 Longfei Ma Thanaphon Ratchatakulpat Gumporn Supasettaysa 《Proceedings of Business and Economic Studies》 2024年第4期16-22,共7页
To address the challenges faced by manufacturing enterprises in digital transformation,this paper analyzes the relationship between digital transformation and enterprise performance.Using panel data from domestic A-sh... To address the challenges faced by manufacturing enterprises in digital transformation,this paper analyzes the relationship between digital transformation and enterprise performance.Using panel data from domestic A-share-listed manufacturing enterprises from 2012 to 2022,two hypotheses were proposed.The analysis and verification revealed that digital transformation in manufacturing enterprises can enhance performance and reduce costs.Based on the impact of digital transformation on manufacturing enterprise performance,optimization suggestions are proposed to guide future digital transformation and performance improvement efforts in these enterprises. 展开更多
关键词 Digital transformation Manufacturing enterprise PERFORMANCE costS
下载PDF
CHARACTERISTICS OF WATER TRANSFORMATION AND ITS EFFECTS ON ENVIRONMENT IN THE ARID REGION —A case study in Alar irrigation region of Xinjiang, China 被引量:2
2
作者 Xin Li Yu-dong Song Fu-hua Nian 《Chinese Geographical Science》 SCIE CSCD 2000年第1期53-61,共9页
The characteristics of water balance in arid regions is that the streams are formed in mountain area and continuously evaporates and infiltrates in the process of flowing to plain area, streams finally disappear in th... The characteristics of water balance in arid regions is that the streams are formed in mountain area and continuously evaporates and infiltrates in the process of flowing to plain area, streams finally disappear in the desert or flow into the lakes, which are the low reaches of the rivers. But the distribution and transformation of water in Xinjiang, China have changed under the influences of human activities. The influences of human activities take place in a short time and regionally, especially in arid land where water is the key factor of environment. Water inside of oasis has increased, and water out of oasis or at the lower reaches of the river has decreased. Human activities have caused the environment changes in both positive and negative aspects by changing the circulation and distribution of water. Under the influence of human activities, oases in Xinjiang have expanded, meanwhile some lakes have contracted desertification is serious, natural vegetation has declined and natural environment out of oasis has degenrated. 展开更多
关键词 ARID REGION WATER transformation human activity environment
下载PDF
Laplace Transformation and Ergodic Potential Kernel for q-Process in Random Environment 被引量:2
3
作者 LU Ping HU Dihe 《Wuhan University Journal of Natural Sciences》 CAS 2007年第2期218-224,共7页
This paper introduces some concepts such as q- process in random environment, Laplace transformation, ergodic potential kernel, error function and some basic lemmas.We study the continuity and Laplace transformation o... This paper introduces some concepts such as q- process in random environment, Laplace transformation, ergodic potential kernel, error function and some basic lemmas.We study the continuity and Laplace transformation of random transition function. Finally, we give the sufficient condition for the existence of ergodic potential kernel for homogeneous q- processes in random environments. 展开更多
关键词 random transition function transition density func-tion in random environment q-process in random environment Laplace transformation ergodic potential kernel
下载PDF
Research Progress of On-line Monitoring Technology for Electromagnetic Environment of Power Transmission and Transformation Projects
4
作者 Li Peiming Zhou Jian +2 位作者 Xiao Jun Wang Wenjin Ge Xiaoyang 《Meteorological and Environmental Research》 CAS 2019年第6期67-71,共5页
Based on the collection of relevant literature and cases,the research and application status of on-line monitoring technology for electromagnetic environment of power transmission and transformation projects at home a... Based on the collection of relevant literature and cases,the research and application status of on-line monitoring technology for electromagnetic environment of power transmission and transformation projects at home and abroad were introduced.Moreover,the problems existing in the on-line monitoring of electromagnetic environment were expounded,and the development prospect was forecasted. 展开更多
关键词 ON-LINE monitoring TECHNOLOGY ELECTROMAGNETIC environment Power TRANSMISSION and transformation PROJECT
下载PDF
The Transformation of Environmental Governance from the Point of the Interaction between Government and National People's Congress
5
作者 ZHANG Hu-biao 《Meteorological and Environmental Research》 CAS 2012年第3期65-68,共4页
Taking cadmium pollution in X River as an example, the interaction between National People's Congress and local government was de- scribed. How the local government transforms its role in environment protection with ... Taking cadmium pollution in X River as an example, the interaction between National People's Congress and local government was de- scribed. How the local government transforms its role in environment protection with the help of several deputies to National People's Congress was expounded from the angle of social construction, which also enlightened the way to build an environment protection road with Chinese characteristics. 展开更多
关键词 Social construction National People's Congress Local government environment treatment transformation China
下载PDF
Teaching Reform and Practice of Plant Growth Environment Course in the Context of Application Transformation Development
6
作者 Yuyu ZHANG Jiani LIU +3 位作者 Jingxiang HU Jinzhu HUA Liyuan YAO Lifang YIN 《Asian Agricultural Research》 2017年第7期76-79,共4页
Through the personnel training program,revising the syllabus,optimizing teaching contents,reforming teaching methods,strengthening practical teaching links and reforming examination methods,this paper explored the tea... Through the personnel training program,revising the syllabus,optimizing teaching contents,reforming teaching methods,strengthening practical teaching links and reforming examination methods,this paper explored the teaching reform and practice of Plant Growth Environment Course,in order to improve the teaching effect,stimulate learning interests of students,and cultivate application type talents meeting social demands. 展开更多
关键词 Application transformation Plant growth environment Teaching reform
下载PDF
Research Progress of Migration and Transformation of Pharmaceuticals and Personal Care Products in Underground Environment
7
作者 Zhang Fang Zhe Ma +1 位作者 Xinmin Xie Baizhong Yan 《Journal of Environmental Science and Engineering(B)》 2013年第12期736-740,共5页
With the increasing use of PPCPs (pharmaceuticals and personal care products), the impact caused by the accumulation of PPCPs on the environment has become increasingly serious and has attracted considerable attenti... With the increasing use of PPCPs (pharmaceuticals and personal care products), the impact caused by the accumulation of PPCPs on the environment has become increasingly serious and has attracted considerable attention. In the last 10 years, major studies on PPCPs have focused on the sources and analytical testing of concentrations in the environment. Afterward, studies have shifted to the transfer and transformation of PCPPs in the environment and to the environmental risk assessment of PPCPs. Studies on PPCPs in the underground environment have mainly focused on their adsorption, desorption, transfer, and transformation in the aeration and saturation zones. The main methods applied in these studies include indoor simulation experiments and outdoor sampling and testing. These studies have mainly considered one dimension, and most of them have concentrated only on the aeration or saturation zone. Therefore, the main developing directions of studies on PPCPs are the comprehensive study of the transfer and transform process from source to sink in the underground environment and the establishment of an effective and efficient PPCP detection system, 展开更多
关键词 PPCPS transfer and transformation POLLUTION underground environment.
下载PDF
The Constitutional Transformation and a Threat of the Environment in Poland
8
作者 Krzysztof R.Mazurski 《Journal of Environmental Protection》 2011年第4期395-398,共4页
The article concerns a problem of the quantitative seizure of a threat to natural environment. Applied taxonomic method – leading to so called synthetic index of threat and basing on earlier tests, showed the large u... The article concerns a problem of the quantitative seizure of a threat to natural environment. Applied taxonomic method – leading to so called synthetic index of threat and basing on earlier tests, showed the large usefulness for analyses in time and space. Additionally, it was undertaken analysis of connections with economic-political situation in Poland as a result of the constitutional transformation after 1989. It was found that the intensity of anthropic pressure had clearly decreased, but this does not have the statistical relationship with the variable size of inputs for the envi-ronment protection. 展开更多
关键词 environment Measures THREAT transformation Poland
下载PDF
Environmental and Cost Advantages of Using Polyethylene Terephthalate Fibre Reinforced Concrete with Fly Ash as a Partial Cement Replacement 被引量:1
9
作者 Rebecca Belay Kassa Christopher Kanali Nathaniel Ambassah 《Open Journal of Civil Engineering》 2019年第4期281-290,共10页
Solid waste disposal is an alarming problem in most African countries. Plastic wastes like Polyethylene Terephthalate (PET) bottles and powdered wastes like fly ash are severely persisting environmental hazards. They ... Solid waste disposal is an alarming problem in most African countries. Plastic wastes like Polyethylene Terephthalate (PET) bottles and powdered wastes like fly ash are severely persisting environmental hazards. They are brutally polluting the water bodies, landfills, as well as the atmosphere. The construction industry has been working towards improving concrete quality by developing alternative methods like partial cement replacement with different pozzolanic elements as well as using waste fibrous materials. Fly ash and PET bottle fibres are two common waste materials that can be used. This article is a part of a research that studied the combined effects of the addition of PET bottle fibres and fly ash (as a partial cement replacement) on the structural performance of concrete. From a purely engineering point of view, the research results indicate that the utilization and incorporation of PET and fly ash wastes in the construction industry are a viable solution to make concrete quality better. This article presents, beyond the engineering properties and experimental works, the economic and environmental advantages of the addition of these waste materials to the conventional concrete mixture. The addition of PET bottle fibres and fly ash resulted in positive cost implications providing a production cost reduction of 19% over the conventional concrete mixture. The removal of these materials from the environment also showed reduction of the emission of toxic elements to landfills and water bodies that put human, animal and plant lives in danger. 展开更多
关键词 Concrete PET FLY ASH cost environment Pollution LANDFILL
下载PDF
Costs and Benefits of China's Environmental Regulation
10
作者 李钢 马岩 姚磊磊 《China Economist》 2011年第3期70-81,共12页
This paper examines the current costs, benefits and intensity of China's industrial environment regulation, as well as the path of regulatory enhancement. Regulatory intensity has been on the rise since 1997. The int... This paper examines the current costs, benefits and intensity of China's industrial environment regulation, as well as the path of regulatory enhancement. Regulatory intensity has been on the rise since 1997. The intensity was only 43 in 1997 and then reached 68 by 2007. This paper for the first time compares the treatment costs at the front and rear ends of pollution chain, employs the concept of regulatory benefit multiplier, and calculates the benefit multipliers for different pollutants. Results indicate that enhanced environmental protection since 1997 makes social and economic sense, particularly for the front end treatment of various pollutants since 2004, which have considerable economic benefits. After comparing the benefit multipliers, we have prioritized the pollutants for regulatory consideration: environmental regulation shouM be made tougher for waste water first, and then dust and fumes, followed by SO2 and lastly CO2. This will help to achieve the best environmental outcomes while incurring no additional economic costs. 展开更多
关键词 protection of industrial environment environmental regulation environmental cost COMPETITIVENESS
下载PDF
Weighted Time-Based Global Hierarchical Path Planning in Dynamic Environment 被引量:2
11
作者 邢薇薇 魏翔 卢苇 《Transactions of Tianjin University》 EI CAS 2014年第3期223-231,共9页
A weighted time-based global hierarchical path planning method is proposed to obtain the global optimal path from the starting point to the destination with time optimal control. First, the grid-or graph-based modelin... A weighted time-based global hierarchical path planning method is proposed to obtain the global optimal path from the starting point to the destination with time optimal control. First, the grid-or graph-based modeling is performed and the environment is divided into a set of grids or nodes. Then two time-based features of time interval and time cost are presented. The time intervals for each grid are built, during each interval the condition of the grid remains stable, and a time cost of passing through the grid is defined and assigned to each interval. Furthermore, the weight is introduced for taking both time and distance into consideration, and thus a sequence of multiscale paths with total time cost can be achieved. Experimental results show that the proposed method can handle the complex dynamic environment, obtain the global time optimal path and has the potential to be applied to the autonomous robot navigation and traffic environment. 展开更多
关键词 path planning dynamic environment time optimal control time cost
下载PDF
Reversible Data Hiding for Medical Images in Cloud Computing Environments Based on Chaotic Hénon Map
12
作者 Li-Chin Huang Min-Shiang Hwang Lin-Yu Tseng 《Journal of Electronic Science and Technology》 CAS 2013年第2期230-236,共7页
Reversible data hiding techniques are capable of reconstructing the original cover image from stego-images. Recently, many researchers have focused on reversible data hiding to protect intellectual property rights. In... Reversible data hiding techniques are capable of reconstructing the original cover image from stego-images. Recently, many researchers have focused on reversible data hiding to protect intellectual property rights. In this paper, we combine reversible data hiding with the chaotic Henon map as an encryption technique to achieve an acceptable level of confidentiality in cloud computing environments. And, Haar digital wavelet transformation (HDWT) is also applied to convert an image from a spatial domain into a frequency domain. And then the decimal of coefficients and integer of high frequency band are modified for hiding secret bits. Finally, the modified coefficients are inversely transformed to stego-images. 展开更多
关键词 Cloud computing environments ENCRYPTION Haar digital wavelet transformation Henonmap reversible data embedding.
下载PDF
Probabilistic Analysis of Life Cycle Cost for Power Transformer
13
作者 Jianpeng Bian Xiaoyun Sun +2 位作者 Mingming Wang Haiqing Zheng Hui Xing 《Journal of Power and Energy Engineering》 2014年第4期489-494,共6页
The selection of power transformer is very important to power sector. Most methods are utilized according to the initial cost and don’t consider the synthetical evaluation of economy and technology. Based on previous... The selection of power transformer is very important to power sector. Most methods are utilized according to the initial cost and don’t consider the synthetical evaluation of economy and technology. Based on previous research, this paper addresses a new practical probabilistic life cycle cost model. Then, in order to demonstrate the practicability of probabilistic life cycle cost for the power transformer, illustrative investment alternatives of actual power transformers are discussed. From the result of the numerical investigation, it may be positively stated that the optimum investment alternative for the power transformer based on the probabilistic life cycle cost model proposed in this study will lead to a more rational, economical and effective procedure compared with the conventional method only considering the initial cost. 展开更多
关键词 POWER transformER PROBABILISTIC Analysis LIFE CYCLE cost
下载PDF
The Impacts of Tax Procedures Reform on Business Environment in Vietnam: Achievements and Further Reforms
14
作者 Le Xuan Truong 《Journal of Modern Accounting and Auditing》 2017年第7期299-305,共7页
Tax procedures are factors that strongly affect the business environment. A simple and convenient tax procedures system will contribute to a good business environment by easing of tax returns preparation, reducing tax... Tax procedures are factors that strongly affect the business environment. A simple and convenient tax procedures system will contribute to a good business environment by easing of tax returns preparation, reducing tax compliance costs, and preventing corruption. This paper examines the results and impacts of previous tax procedures reform on Vietnam's business environment, identifies challenges of tax procedures reform now and the coming years, and discusses areas where further reforms are needed to sustain tax revenue and reduce compliance costs including: (1) wansparent and comprehensive guidance to all tax laws and other legal tax documents; (2) widening the application of risk management in tax administration; (3) continuing simplification of tax procedures; and (4) development of IT in tax administration. 展开更多
关键词 business environment compliance costs doing business REFORM tax procedures
下载PDF
Ivory Coast Intra Regional Trade: The Role of Infrastructure and Economic Environment
15
作者 FE Doukoure Charles 《Economics World》 2017年第6期595-607,共13页
Intra-regional trade dynamic can foster economic integration with a contribution of the lead economy. In that way, infrastructure and economic environment play an important role in expanding trade by reducing trade co... Intra-regional trade dynamic can foster economic integration with a contribution of the lead economy. In that way, infrastructure and economic environment play an important role in expanding trade by reducing trade costs. This paper examines the role of infrastructure and the economic environment on Ivory Coast intra-regional trade. The study performs a transformed and advanced gravity model, using panel data over the period 1996 to 2013, modelling exports of Ivory Coast. The analysis shows experts towards the other member states of West African Economic and Monetary Union (WAEMU) depend significantly on the availability of transport and communication infrastructures developed as well as variables such as Gross Domestic Product growth, economic similarity within countries, Foreign Direct Investment (FDI) net inflows in Ivory Coast. Estimations point out that indeed, the level of economic growth in the other member countries, Foreign Direct Investment (FDI) net inflows in Ivory Coast, the number of mobile phone subscribers per 100 inhabitants in Ivory Coast and the proportion of paved roads, have a positive impact on Ivory Coast intra-regional trade. 展开更多
关键词 intra-regional trade INFRASTRUCTURE economic environment transformed gravity model
下载PDF
Combined Economic and Emission Power Dispatch Control Using Substantial Augmented Transformative Algorithm
16
作者 T.R.Manikandan Venkatesan Thangavelu 《Intelligent Automation & Soft Computing》 SCIE 2023年第1期431-447,共17页
The purpose of the Combined Economic Emission Dispatch(CEED)of electric power is to offer the most exceptional schedule for production units,which must run with both low fuel costs and emission levels concurrently,the... The purpose of the Combined Economic Emission Dispatch(CEED)of electric power is to offer the most exceptional schedule for production units,which must run with both low fuel costs and emission levels concurrently,thereby meeting the lack of system equality and inequality constraints.Economic and emissions dispatching has become a primary and significant concern in power system networks.Consequences of using non-renewable fuels as input to exhaust power systems with toxic gas emissions and depleted resources for future generations.The optimal power allocation to generators serves as a solution to this problem.Emission dispatch reduces emissions while ignoring economic considerations.A collective strategy known as Combined Economic and Emission Dispatch is utilized to resolve the above-mentioned problems and investigate the trade-off relationship between fuel cost and emissions.Consequently,this work manages the Substantial Augmented Transformative Algorithm(SATA)to take care of the Combined Economic Emission Dispatch Problem(CEEDP)of warm units while fulfilling imperatives,for example,confines on generator limit,diminish the fuel cost,lessen the emission and decrease the force misfortune.SATA is a stochastic streamlining process that relies upon the development and knowledge of swarms.The goal is to minimize the total fuel cost of fossil-based thermal power generation units that generate and cause environmental pollution.The algorithm searches for solutions in the search space from the smallest to the largest in the case of forwarding search.The simulation of the proposed system is developed using MATLAB Simulink software.Simulation results show the effectiveness and practicability of this method in terms of economic and emission dispatching issues.The performance of the proposed system is compared with existing Artificial Bee Colony-Particle Swarm Optimization(ABC-PSO),Simulated Annealing(SA),and Differential Evolution(DE)methods.The fuel cost and gas emission of the proposed system are 128904$/hr and 138094.4652$/hr. 展开更多
关键词 Economic emission DISPATCH fuel cost substantial augmented transformative algorithm
下载PDF
集成化白云石悬浮煅烧引领镁产业变革 被引量:3
17
作者 单智伟 王悦存 +2 位作者 王鹏飞 马英子 郑芮 《中国材料进展》 CAS CSCD 北大核心 2024年第1期46-53,共8页
白云石煅烧作为硅热法炼镁的第一步,不仅是主要的能耗和碳排放环节,其煅烧产物的质量更是直接影响原镁的产率与品质。目前主流的回转窑煅烧工艺存在热效率低、能耗高、污染大、单线产能低、产品质量不稳定等问题,整个煅烧工序亟待技术... 白云石煅烧作为硅热法炼镁的第一步,不仅是主要的能耗和碳排放环节,其煅烧产物的质量更是直接影响原镁的产率与品质。目前主流的回转窑煅烧工艺存在热效率低、能耗高、污染大、单线产能低、产品质量不稳定等问题,整个煅烧工序亟待技术革新。提出了利用悬浮态煅烧替代回转窑进行白云石煅烧,并对两种工艺进行了综合对比,悬浮煅烧呈现出显著的技术、环保及经济优势:理论上节能50%以上,CO_(2)减排超20%,生产成本较目前降低35%,而且可以有效避免“过烧”和“欠烧”,获得高质量、性能稳定性好的煅烧产物,为后续炼镁环节提供优质原料。还分析了用绿色、高效的集成化白云石悬浮煅烧技术替代目前的“分散式”煅烧的可行性及对整个镁产业可能产生的颠覆性影响。 展开更多
关键词 白云石 悬浮煅烧 集成化 绿色 低成本
下载PDF
企业数字化转型能否降低劳动力成本粘性——基于内部控制的考察 被引量:2
18
作者 王贤彬 陈禾 《广东财经大学学报》 北大核心 2024年第2期71-87,共17页
在全球数字经济的大浪潮下,数字化转型对企业的经营管理及成本费用产生了深刻影响。利用2010—2021年我国A股上市公司的样本数据,构建企业数字化转型指标,探究企业数字化转型对劳动力成本粘性的影响效应及机制。研究发现:企业数字化转... 在全球数字经济的大浪潮下,数字化转型对企业的经营管理及成本费用产生了深刻影响。利用2010—2021年我国A股上市公司的样本数据,构建企业数字化转型指标,探究企业数字化转型对劳动力成本粘性的影响效应及机制。研究发现:企业数字化转型有利于提高内部控制质量,从而降低了企业劳动力成本粘性;异质性分析表明,数字化转型对劳动力成本粘性的影响在非国有企业、衰退期企业、劳动密集型企业以及东中部地区企业更明显;进一步检验发现,企业数字化转型对降低劳动力成本粘性具有长期抑制作用,主要体现在用工粘性而非薪酬粘性,且主要影响普通员工而非高管;企业数字化转型还能够更好地提高劳动力成本经济效率。本研究揭示了数字化转型对企业成本性态的影响机理,为实现数字经济与实体经济高质量协同发展提供了现实指导。 展开更多
关键词 数字化转型 劳动力成本粘性 内部控制 劳动力成本经济效率
下载PDF
数字化转型视域中的智慧学习环境理论演进 被引量:2
19
作者 王运武 黄荣怀 焦艳丽 《黑龙江高教研究》 北大核心 2024年第3期154-160,共7页
全球加快了数字化转型,呼唤智慧学习环境实现理论突破。从全球看,20世纪60年代初期以来,学习环境逐渐受到人们关注;20世纪90年代以来,以智慧校园、智慧教室为代表的智慧学习环境研究逐渐增多。在人类文明进程中,学习环境先后经历了五种... 全球加快了数字化转型,呼唤智慧学习环境实现理论突破。从全球看,20世纪60年代初期以来,学习环境逐渐受到人们关注;20世纪90年代以来,以智慧校园、智慧教室为代表的智慧学习环境研究逐渐增多。在人类文明进程中,学习环境先后经历了五种类型,即场景、学习环境、数字学习环境、智慧学习环境和泛在智慧学习环境。人类历史上就非常重视学习环境和氛围,尤其是数字化转型拓展了智慧学习环境内涵,智慧学习环境的内涵需要被重新定义。智慧学习环境分析框架包含六部分,即政策与标准、理论分析框架、九大场域、三大类型、关键技术和元宇宙。智慧学习环境十大理论基础是设计思维、情感化设计、人机交互、活动、沉浸、具身认知、分布式认知、情境认知、认知负荷和建筑色彩视觉造型。智慧学习环境逐渐形成了较为完整的理论体系,正在从理论基础迈向理论创新。在数字转型背景下,面向建设教育强国、实现教育现代化的时代使命,迫切需要加快泛在智慧学习环境建设。 展开更多
关键词 数字化转型 智慧教育 智慧社会 智慧学习环境 知识创造 泛在创新 理论演进
下载PDF
Three Dimensional Transformations in the Film Subtitle Translation
20
作者 陈志海 DONG Shu-xin REN Hui-ying 《海外英语》 2015年第4期178-179,182,共3页
Film plays an indispensable part in cultural exchange. However, current scholars' studies on the film subtitle translation are less than literary translation. There exists no systematic strategy and theory guiding... Film plays an indispensable part in cultural exchange. However, current scholars' studies on the film subtitle translation are less than literary translation. There exists no systematic strategy and theory guiding it, and there still exists some problems.This paper introduces eco-translatology to film subtitle translation. Eco-translatology proposes that translation is an alternative cycle of translators' adaptation and selection activities in translational eco-environment. The translation method focuses on threedimensional transformation, namely linguistic, cultural and communicative dimensions. 展开更多
关键词 ECO-TRANSLATOLOGY film SUBTITLE translation three DIMENSIONAL transformationS TRANSLATIONAL ECO-environment
下载PDF
上一页 1 2 145 下一页 到第
使用帮助 返回顶部