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Existing Problems of Intensive Curing Barn and Optimization Analysis 被引量:1
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作者 左业华 雷庭 +2 位作者 王远辉 刘会忠 卢顺友 《Agricultural Science & Technology》 CAS 2014年第8期1271-1273,共3页
Intensive curing barn is an important component of flue-cured tobacco pro-duction in China, with progress made. However, problems stil exist, such as lower heat energy utilization efficiency and slow equipment update.... Intensive curing barn is an important component of flue-cured tobacco pro-duction in China, with progress made. However, problems stil exist, such as lower heat energy utilization efficiency and slow equipment update. In the research, opti-mization ways of tobacco barn were analyzed in flue-cured tobacco production re-gions, and assessment was made on improvement effects, in order to provide refer-ences for highly-efficient and low-carbon development of curing barn. 展开更多
关键词 Intensive curing barn existing problems Optimization analysis
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Construction of Legal System of China's Farmland Protection under the Coexistence of Multiple Objectives:Historical Logic,Practical Problems and Optimization Paths 被引量:1
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作者 Shengnan MA Jiaxin ZHOU Yongfang YANG 《Asian Agricultural Research》 2023年第2期26-34,38,共10页
[Objectives]To explore the evolution of the legal system of farmland protection and explore the rules and characteristics of policy development based on the theory and logic of institutional change since China's r... [Objectives]To explore the evolution of the legal system of farmland protection and explore the rules and characteristics of policy development based on the theory and logic of institutional change since China's reform and opening up,reveal the problems and deep-seated reasons of its legislation,clarify the direction of farmland protection in the new period,and solve the"non-agricultural""non-grain"and ecological problems of farmland.[Methods]Literature analysis and inductive deduction methods were used.[Results]The evolution of the farmland protection legal system has gone through the process of"national consciousness-policy guidelines-institutional system",the change from"single subject to multiple subjects";change from the use of"one-way administrative means to coordinated use of administrative,economic and technical means".The practical problems of the farmland protection legal system are mainly due to the insufficient systematization of the farmland protection legal system itself,the generalization of quantity protection,the transformation of quality protection,and the absence of ecological protection.[Conclusions]It is recommended to improve the existing farmland protection legal system from the establishment of the Farmland Protection Law,the improvement of the farmland protection public participation mechanism and supervision mechanism,the establishment of the farmland quality construction and improvement system,the differentiated farmland occupation and supplementation balance system,and the ecological restoration system. 展开更多
关键词 Farmland protection Legal system construction Policy evolution existing problems Optimization path
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ON THE EXISTENCE AND NODAL CHARACTER OF SOLUTIONS OF SINGULAR NONLINEAR BOUNDARY VALUE PROBLEMS 被引量:1
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作者 曹道珉 邓引斌 《Acta Mathematica Scientia》 SCIE CSCD 1990年第4期471-478,共8页
In this paper we prove the existence of k-node solution of singular nonlinear boundary value problems for each k is-an-element-of N union {0}.
关键词 ON THE existENCE AND NODAL CHARACTER OF SOLUTIONS OF SINGULAR NONLINEAR BOUNDARY VALUE problems BVP
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The Existing Structural Problems in World Economy
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《Contemporary International Relations》 1995年第4期6-12,共7页
Since the seventies,world economy has been engaged in adjustment princi-pally in the following three fields.First,the shift of economic developmentmode from that of aggregate quantitative growth to that of quality-eff... Since the seventies,world economy has been engaged in adjustment princi-pally in the following three fields.First,the shift of economic developmentmode from that of aggregate quantitative growth to that of quality-effective-ness.Second,the reform of economic system with more and more countries realiz-ing market economy.Third,the economy getting more opened as economic global-ization further avdances. 展开更多
关键词 The existing Structural problems in World Economy World
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Research on Causes and Countermeasures of Existing Problems in Tourism Signage System
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作者 Niu Wei 《Management Studies》 2021年第3期220-225,共6页
China takes the road of tourism development,and the tourism industry is gradually branded,which is also a reflect of tourism management to adapt to the trend of the times.Tourism is an important economic project for t... China takes the road of tourism development,and the tourism industry is gradually branded,which is also a reflect of tourism management to adapt to the trend of the times.Tourism is an important economic project for the participation of the whole people.By optimizing the local resources,the tourism space is carried out in an orderly manner,and the rich tourism products are displayed in front of the tourists.With the development of tourism,the scientific tourism system has been established,and the globalization of tourism has been realized.To promote the healthy development of tourism,tourist signs are essential.From the current established tourism signage system,there are still some problems,which affect the quality of tourism management.It is necessary to take corresponding countermeasures.This paper focuses on the causes and strategies in response to the existing problems in the tourism signage system. 展开更多
关键词 tourism signage system existing problems COUNTERMEASURES
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Existing Problems and Optimization Path of Enterprise Performance Management System
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作者 GUOJionglong 《外文科技期刊数据库(文摘版)经济管理》 2020年第1期053-056,共6页
Performance management is one of the important contents of enterprise operation management. The effectiveness of performance management will directly affect the overall performance of the enterprise, so the developmen... Performance management is one of the important contents of enterprise operation management. The effectiveness of performance management will directly affect the overall performance of the enterprise, so the development of performance management is of great significance. But from the current situation, there are still some deficiencies in the performance management of many enterprises, leading to the actual role of performance management can not be played. Therefore, we should analyze and optimize the existing problems of enterprise performance management system. 展开更多
关键词 ENTERPRISE performance management system existing problems optimization path
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Analysis on the Problems Existing in the Control and Survey Work in the Reconstruction of Municipal Roads
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作者 BU Xiumei YANG Feixiang 《外文科技期刊数据库(文摘版)工程技术》 2020年第1期040-042,共3页
At present, China's social and economic development is accelerating, and the quality and overall level of municipal road projects have been greatly improved. However, with the prosperity of traffic, road traffic c... At present, China's social and economic development is accelerating, and the quality and overall level of municipal road projects have been greatly improved. However, with the prosperity of traffic, road traffic congestion and road aging problems have become increasingly prominent. The renovation project of old municipal roads has gradually become the focus of attention. The transformation of municipal roads is imminent. Therefore, we must strictly control the construction quality of the old road renovation project municipal roads, ensure the control and measurement of the old road renovation project municipal roads, and then improve the overall environmental level of the city, increase the residents' sense of belonging, and promote the rapid development of the urbanization process . 展开更多
关键词 municipal road reconstruction construction control measurement existing problems
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Based on the Existing Problems and Methods of Junior Middle School Mathematics Preview
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作者 YANG Zhi 《外文科技期刊数据库(文摘版)教育科学》 2021年第11期253-255,共5页
"New Curriculum Standards" points out that preview is an independent exploration activity of learning individuals. Preview is actually improve a student's self-study ability, let them to an unknown or ne... "New Curriculum Standards" points out that preview is an independent exploration activity of learning individuals. Preview is actually improve a student's self-study ability, let them to an unknown or new knowledge, through their effective learning method to master knowledge, when cultivating the self-learning ability, the students met before he don't understand the knowledge, or is in the process of preparation of encountered obstacles, can prepare to cultivate the ability to solve. Preview is to let students have an understanding of the knowledge they will learn in advance, so that they have a good idea of the follow-up study, so that they can get twice the result with half the effort and smoothly link up the classroom learning. 展开更多
关键词 the significance of preview existing problems effective method
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Problems existing in water resources development and the countermeasures in northwest China continental basins
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《Global Geology》 1998年第1期57-58,共2页
关键词 problems existing in water resources development and the countermeasures in northwest China continental basins
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Study on Problems and Countermeasures in the Construction of Warping Dam Projects in the Loess Plateau Area
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作者 Xia Ji 《Journal of Architectural Research and Development》 2025年第6期11-17,共7页
In recent years,to better address soil erosion,the Loess Plateau area has seen a surge in the construction of warping dam projects.Warping dams have strong functions in soil and water conservation as well as warping f... In recent years,to better address soil erosion,the Loess Plateau area has seen a surge in the construction of warping dam projects.Warping dams have strong functions in soil and water conservation as well as warping for farmland creation,serving as a key support for ecological restoration and economic development in the Loess Plateau area in the new era.However,in light of practical conditions,there are many problems in their construction process,which have affected their actual operation quality.In this regard,while expounding on the value and significance of warping dam project construction in the Loess Plateau area,this paper discusses the existing problems and effective countermeasures,aiming to provide some references for relevant personnel. 展开更多
关键词 Keywords:Loess plateau Warping dam project Value and significance existing problems Effective countermeasures
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Problems and Strategies for Arable Land Eco-conservation in China 被引量:2
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作者 杨诗琴 杨子生 《Agricultural Science & Technology》 CAS 2017年第7期1355-1357,1360,共4页
Arable lands are so important to China concerning food security and ec- onomy development. And eco-problems are rising and food security risks are widespread. The research reviewed quantity and quality of domestic ara... Arable lands are so important to China concerning food security and ec- onomy development. And eco-problems are rising and food security risks are widespread. The research reviewed quantity and quality of domestic arable lands, analyzed existing problems and proposed countermeasures for reinforcing domestic arable land conservation. 展开更多
关键词 Arable land Eco-conservation existing problems STRATEGIES China
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On the Experience, Problems in Science and Technology Services of Basic Scientific Research Institutes and Suggestions——Taking Zhenjiang Institute of Agricultural Sciences in Hilly Areas of Jiangsu as an Example
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作者 王敬根 单延博 +1 位作者 曲直 刘照亭 《Agricultural Science & Technology》 CAS 2017年第12期2681-2683,2686,共4页
Taking the Jiangsu Province as Zhenjiang Academy of Agricultural Sciences in Hilly Areas of an example, the paper elaborated the advanced practices of agricultural research institutes in agricultural science and techn... Taking the Jiangsu Province as Zhenjiang Academy of Agricultural Sciences in Hilly Areas of an example, the paper elaborated the advanced practices of agricultural research institutes in agricultural science and technology services and analyzed the difficulties and solutions in the services. process of science and technologyservices. 展开更多
关键词 Basic scientific research institutes Science and technology services EXPERIENCE existing problems SOLUTIONS
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EXISTENCE AND NONEXISTENCE OF GLOBAL SOLUTIONS OF THE INITIAL-BOUNDARY VALUE PROBLEM FOR SOME DEGENERATE HYPERBOLIC EQUATION 被引量:2
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作者 叶耀军 《Acta Mathematica Scientia》 SCIE CSCD 2005年第4期703-709,共7页
The author considers the global existence and global nonexistence of the initial-boundary value problem for some degenerate hyperbolic equation of the form utt- div(|△↓|^P-2 △↓u)=|u|^m u, (x,t)∈[0, +∞)... The author considers the global existence and global nonexistence of the initial-boundary value problem for some degenerate hyperbolic equation of the form utt- div(|△↓|^P-2 △↓u)=|u|^m u, (x,t)∈[0, +∞) ×Ω with p 〉 2 and m 〉 0. He deals with the global solutions by D.H.Sattinger's potential well ideas. At the same time, when the initial energy is positive, but appropriately bounded, the global nonexistence of solutions is verified by using the analysis method. 展开更多
关键词 Degenerate hyperbolic equations global existence and global nonexistence initial-boundary value problem
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EXISTENCE AND NONEXISTENCE FOR THE INITIAL BOUNDARY VALUE PROBLEM OF ONE CLASS OF SYSTEM OF MULTIDIMENSIONAL NONLINEAR SCHRDINGER EQUATIONS WITH OPERATOR AND THEIR SOLITON SOLUTIONS 被引量:3
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作者 郭柏灵 《Acta Mathematica Scientia》 SCIE CSCD 1989年第1期45-56,共12页
The nonlinear interactions between the monochromatic wave have been considered by K. Matsunchi, who also proposed one class of the nonlinear Schrdinger equation system with wave operator. We also obtain the same type ... The nonlinear interactions between the monochromatic wave have been considered by K. Matsunchi, who also proposed one class of the nonlinear Schrdinger equation system with wave operator. We also obtain the same type of equations, which are satisfied by transverse velocity of higher frequency electron, as we study soliton in plasma physics. In this paper, under some condition we study the existence and nonexistence for this equations in the cases possessing different signs in nonlinear term. 展开更多
关键词 DINGER EQUATIONS WITH OPERATOR AND THEIR SOLITON SOLUTIONS existENCE AND NONexistENCE FOR THE INITIAL BOUNDARY VALUE PROBLEM OF ONE CLASS OF SYSTEM OF MULTIDIMENSIONAL NONLINEAR SCHR
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A Preliminary Study on the Problems and Improvement of the Latest Land Use Classification System in China
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作者 Qiuju WU Zisheng YANG 《Asian Agricultural Research》 2021年第7期32-34,共3页
The establishment of a unified land use classification system is the basis for realizing the unified management of land and sea,urban and rural areas,and aboveground and underground space.In November 2020,the Ministry... The establishment of a unified land use classification system is the basis for realizing the unified management of land and sea,urban and rural areas,and aboveground and underground space.In November 2020,the Ministry of Natural Resources of the People's Republic of China issued the Classification Guide for Land and Space Survey,Planning and Use Control of Land and Sea(for Trial Implementation),which aims to establish a national unified land and sea use classification system,lay an important foundation for scientific planning and unified management of natural resources,rational use and protection of natural resources,and speed up the construction of a new pattern of land and space development and protection.However,there are still some obvious shortcomings in the Classification Guide.This paper analyzes some problems existing in this classification standard from three aspects of logicality,rigorousness and comprehensiveness,and puts forward some suggestions for further improvement.This has important practical significance to better guiding the practice of land use and land resources management,and then to achieving the goal of unified management of natural resources. 展开更多
关键词 Land use Classification system existing problems Suggestions for improvement
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AN APPLICATION OF SCHAUDER’S FIXED POINT THEOREM TO THE EXISTENCE OF SOLUTlONS OF IMPULSIVELY DIFFERENTIAL EQUATIONS
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作者 董玉君 邹尔新 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI 1995年第4期377-381,共5页
In this paper the existence of solutions of a boundary value problem forimpulsively differential equations that is difficult to solve by the upper and lowersolution method will be proved by means of Schauder’s fixed ... In this paper the existence of solutions of a boundary value problem forimpulsively differential equations that is difficult to solve by the upper and lowersolution method will be proved by means of Schauder’s fixed point theorem,whichimproves some existing results. 展开更多
关键词 Schaudcr’s fixed point theorem boundary value problem existence of solutions
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The Problems and Solutions of Enterprise Financial Management in the Perspective of Digital Economy
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作者 Taoyuan Wan 《Proceedings of Business and Economic Studies》 2024年第5期206-212,共7页
From the perspective of the digital economy,enterprise financial management is facing unprecedented challenges and opportunities.Traditional financial management models are no longer suited to current development need... From the perspective of the digital economy,enterprise financial management is facing unprecedented challenges and opportunities.Traditional financial management models are no longer suited to current development needs.Fine-tuning financial management is essential to support the modernization of enterprises,guard against operational risks,and promote coordination across the entire value chain for greater economic efficiency.With the help of digital technology,data-driven,highly interconnected,and intelligent decision-making processes are becoming more prominent,profoundly transforming the operational and financial management models of enterprises.This enables financial management to keep pace with modern developments.In light of this,the paper explores the connotations and mechanisms of the digital economy and enterprise financial management,clarifies relevant conceptual characteristics,and identifies problems in financial management under the digital economy.It also offers strategies for optimization and problem-solving,with the aim of providing valuable insights for educators and practitioners. 展开更多
关键词 Digital economy ENTERPRISE Financial management existence problems Solution strategy
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Problems and Countermeasures of River Regulation in Water Conservancy Projects
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作者 SONG Weiqiang 《外文科技期刊数据库(文摘版)工程技术》 2021年第3期146-151,共6页
In the process of national economic development, water conservancy project plays an important role, its operation is not only related to agricultural production, but also related to industrial production, and water co... In the process of national economic development, water conservancy project plays an important role, its operation is not only related to agricultural production, but also related to industrial production, and water conservancy project is closely related to people's production and life. At present, the national capital investment in water conservancy project construction is gradually increasing. After these water conservancy projects are put into use, it is necessary to strengthen the operation management, especially to carry out regular river regulation, timely deal with various problems existing in river regulation, maintain the smoothness of the river, avoid the adverse impact of river regulation problems on the function and benefit of water conservancy projects, and make water conservancy projects more efficient. It can give full play to its economic, social and ecological benefits. Next, the article analyzes the problems and Countermeasures of water conservancy project River governance. 展开更多
关键词 water conservancy project river regulation existing problems COUNTERMEASURES
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A Study on the Problems and Countermeasures of English Vocabulary Teaching in Primary School
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作者 钱佩思 邵贤 《海外英语》 2021年第6期279-280,共2页
This paper analyzes the current situation of English vocabulary teaching in primary schools through a questionnaire sur⁃vey of 180 students in Liushi No.5 Primary School,and points out the existing problems.Then,some ... This paper analyzes the current situation of English vocabulary teaching in primary schools through a questionnaire sur⁃vey of 180 students in Liushi No.5 Primary School,and points out the existing problems.Then,some effective suggestions are put forward.The research in this paper is of great significance to helping primary school students improve their English vocabulary learning ability.Meanwhile,it can provide a powerful reference for how to enrich the primary school English vocabulary class and how to improve teaching efficiency. 展开更多
关键词 primary school English vocabulary teaching existing problems COUNTERMEASURES
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Problems and Optimization Methods in Installation and Commissioning of Electrical Equipment
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作者 YUE Guohui 《外文科技期刊数据库(文摘版)工程技术》 2021年第12期714-717,共6页
For electrical equipment, in the process of operation, there is a close relationship between operation quality and power consumption quality. Therefore, the installation process of electrical equipment is also an impo... For electrical equipment, in the process of operation, there is a close relationship between operation quality and power consumption quality. Therefore, the installation process of electrical equipment is also an important part of power engineering project construction. n order to further improve the usability of electrical equipment and avoid potential safety hazards, it is necessary to improve the practicability of electrical equipment, so as to improve the safety in the operation of power system. ext, the article discusses the problems and optimization methods existing in the installation and commissioning of electrical equipment. 展开更多
关键词 lectrical equipment installation and commissioning existing problems optimization mode
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