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Simultaneous Identification of Thermophysical Properties of Semitransparent Media Using a Hybrid Model Based on Artificial Neural Network and Evolutionary Algorithm
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作者 LIU Yang HU Shaochuang 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI CSCD 2024年第4期458-475,共18页
A hybrid identification model based on multilayer artificial neural networks(ANNs) and particle swarm optimization(PSO) algorithm is developed to improve the simultaneous identification efficiency of thermal conductiv... A hybrid identification model based on multilayer artificial neural networks(ANNs) and particle swarm optimization(PSO) algorithm is developed to improve the simultaneous identification efficiency of thermal conductivity and effective absorption coefficient of semitransparent materials.For the direct model,the spherical harmonic method and the finite volume method are used to solve the coupled conduction-radiation heat transfer problem in an absorbing,emitting,and non-scattering 2D axisymmetric gray medium in the background of laser flash method.For the identification part,firstly,the temperature field and the incident radiation field in different positions are chosen as observables.Then,a traditional identification model based on PSO algorithm is established.Finally,multilayer ANNs are built to fit and replace the direct model in the traditional identification model to speed up the identification process.The results show that compared with the traditional identification model,the time cost of the hybrid identification model is reduced by about 1 000 times.Besides,the hybrid identification model remains a high level of accuracy even with measurement errors. 展开更多
关键词 semitransparent medium coupled conduction-radiation heat transfer thermophysical properties simultaneous identification multilayer artificial neural networks(ANNs) evolutionary algorithm hybrid identification model
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Mathematical Wave Functions and 3D Finite Element Modelling of the Electron and Positron
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作者 Declan Traill 《Journal of Applied Mathematics and Physics》 2024年第4期1134-1162,共29页
The wave/particle duality of particles in Physics is well known. Particles have properties that uniquely characterize them from one another, such as mass, charge and spin. Charged particles have associated Electric an... The wave/particle duality of particles in Physics is well known. Particles have properties that uniquely characterize them from one another, such as mass, charge and spin. Charged particles have associated Electric and Magnetic fields. Also, every moving particle has a De Broglie wavelength determined by its mass and velocity. This paper shows that all of these properties of a particle can be derived from a single wave function equation for that particle. Wave functions for the Electron and the Positron are presented and principles are provided that can be used to calculate the wave functions of all the fundamental particles in Physics. Fundamental particles such as electrons and positrons are considered to be point particles in the Standard Model of Physics and are not considered to have a structure. This paper demonstrates that they do indeed have structure and that this structure extends into the space around the particle’s center (in fact, they have infinite extent), but with rapidly diminishing energy density with the distance from that center. The particles are formed from Electromagnetic standing waves, which are stable solutions to the Schrödinger and Classical wave equations. This stable structure therefore accounts for both the wave and particle nature of these particles. In fact, all of their properties such as mass, spin and electric charge, can be accounted for from this structure. These particle properties appear to originate from a single point at the center of the wave function structure, in the same sort of way that the Shell theorem of gravity causes the gravity of a body to appear to all originate from a central point. This paper represents the first two fully characterized fundamental particles, with a complete description of their structure and properties, built up from the underlying Electromagnetic waves that comprise these and all fundamental particles. 展开更多
关键词 ELECTRON POSITRON Wave Function Solution Electromagnetic Spin Mass Charge Proof Fundamental Particle Properties Quantum Mechanics Classical Physics Computer 3D model Schrödinger Equation RMS KLEIN GORDON Electric Magnetic Lorentz Invariant Hertzian Vector Point Potential Field Density Phase Flow Attraction REPULSION Shell theorem Ehrenfest VIRIAL Normalization Harmonic Oscillator
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Non‑fungible tokens:a bubble or the end of an era of intellectual property rights
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作者 Elli Kraizberg 《Financial Innovation》 2023年第1期777-796,共20页
The viability of exponentially growing non-fungible token(NFT)market is evaluated by identifying potential value-generating mechanisms that can be rationalized.After identifying the value-generating mechanisms underly... The viability of exponentially growing non-fungible token(NFT)market is evaluated by identifying potential value-generating mechanisms that can be rationalized.After identifying the value-generating mechanisms underlying the positive values of NFTs,this study establishes a pricing model for NFTs that follows a continuous-time financial framework.As NFTs are claimed to securitize“ownership rights short of use”,and as such they may potentially serve as a substitute for the need to rely replace the reliance on the legal protection provided by intellectual property rights(IPRs).Considering this issue,this study evaluates the likelihood that NFTs will replace existing mechanisms that protect producers’rightful claim to use their assets or the need to apply the legal code that governs IPRs.The financial condition for this potential shift is derived for a category of assets whose use or consumption does not reduce supply as the notion of scarcity does not apply. 展开更多
关键词 Non-fungible tokens Intellectual property rights STATUS
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Reform Paths of Rural Land Property Rights System in the Context of Agricultural Modernization
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作者 Mingyi DU 《Asian Agricultural Research》 2023年第2期15-20,共6页
The reform of rural land property rights system can promote large-scale and intensive agricultural production,improve the quality of laborers,improve agricultural production efficiency,increase farmers'income,and ... The reform of rural land property rights system can promote large-scale and intensive agricultural production,improve the quality of laborers,improve agricultural production efficiency,increase farmers'income,and effectively promote the development of agricultural modernization.In the context of the reform of the"separation of three powers",the rural land property rights system still has problems in terms of ownership,use rights,disposal rights,and income rights,which affect the healthy development of agricultural modernization.In this situation,it is necessary to further clarify the subject of rural land ownership,thoroughly improve the right to use rural land,vigorously improve the right to dispose of rural land,effectively protect the right to benefit from rural land,and deeply promote the reform of the rural land property rights system in order to effectively promote the development of agricultural modernization. 展开更多
关键词 Reform of rural land property rights system Agricultural modernization Moderate scale operation
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The Conflict and Balance Between Intellectual Property Rights and Public Freedom of Information in the“Anti-circumvention Clause”
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作者 龚珊珊 严小翔 SHEN Jinjun(译) 《The Journal of Human Rights》 2023年第5期1115-1133,共19页
There is a long-standing conflict between intellectual property rights and public freedom of information.The continuous development of the“anti-circumvention clause”has caused the conflict to intensify.As a basic hu... There is a long-standing conflict between intellectual property rights and public freedom of information.The continuous development of the“anti-circumvention clause”has caused the conflict to intensify.As a basic human right,freedom of information is being gradually eroded by the expansion of intellectual property rights.The existing research mainly carries on the right balance from the negative protection path,but the positive protection path is more advantageous to realizing the public freedom of information and alleviates the conflict between the two kinds of rights.In practice,there are some problems in the application of the anti-circumvention clause,such as the legality of the aim,the division of the protected part,and the determination of the circumvention.This is mainly due to the lack of restrictions on technical measures,the failure to distinguish between“copyright protection”and“contact control”,and the offside and absence of administrative bodies in practice.We should protect public freedom of information by distinguishing the two measures of copyright protection and contact control and the two torts of access and use,increasing the restrictive conditions for the use of technical protection measures,and changing the functions of administrative supervision agencies. 展开更多
关键词 anti-circumvention clause intellectual property rights public information freedom balance of interests human rights
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Unraveling the hydraulic properties of loess for landslide prediction:A study on variations in loess landslides in Lanzhou,Dingxi,and Tianshui,China
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作者 Gao-chao Lin Wei Liu Xing Su 《China Geology》 CAS CSCD 2024年第2期291-302,共12页
Loess has distinctive characteristics,leading to frequent landslide disasters and posing serious threats to the lives and properties of local re sidents.The involvement of water repre sents a critical factor in induci... Loess has distinctive characteristics,leading to frequent landslide disasters and posing serious threats to the lives and properties of local re sidents.The involvement of water repre sents a critical factor in inducing loess landslides.This study focuses on three neighboring cities sequentially situated on the Loess Plateau along the direction of aeolian deposition of loess,namely Lanzhou,Dingxi,and Tianshui,which are densely populated and prone to landslide disasters.The variations in hydraulic properties,including water retention capacity and permeability,are investigated through Soil Water Characteristic Curve(SWCC)test and hydraulic conductivity test.The experimental findings revealed that Tianshui loess exhibited the highest water retention capacity,followed by Dingxi loess,while Lanzhou loess demonstrated the lowest water retention capacity.Contrastingly,the results for the saturated permeability coefficient were found to be the opposite:Tianshui loess showed the lowest permeability,whereas Lanzhou loess displayed the highest permeability.These results are supported and analyzed by scanning electron microscopy(SEM)observation.In addition,the water retention capacity is mathematically expressed using the van Genuchten model and extended to predict unsaturated hydraulic properties of loess.The experimental results exhibit a strong accordance with one another and align with the regional distribution patterns of disasters. 展开更多
关键词 LOESS LANDSLIDE Hydraulic properties Water retention capacity and permeability Soil Water Characteristic Curve(SWCC) Hydraulic conductivity Van Genuchten model Hydrogeological engineering Geological hazards prevention engineering
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Research on the Impact of Digital Transformation on the Business Performance of Commercial Banks
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作者 Zhengyu Wu 《Proceedings of Business and Economic Studies》 2024年第3期227-235,共9页
Nowadays,with the development of the digital economy,commercial banks are actively conducting digital transformation.Studying the impact of the digital transformation of commercial banks on their operating performance... Nowadays,with the development of the digital economy,commercial banks are actively conducting digital transformation.Studying the impact of the digital transformation of commercial banks on their operating performance can help commercial banks form a stronger core competitiveness and promote high-quality financial development.Based on the above background,this article first describes the status and development of digital transformation and development of commercial banks,and secondly analyzes whether Chinese commercial banks’digital transformation is conducive to improving their operating performance.Thirdly,by selecting the data of the listed commercial banks in the ten years of 2012–2022,this article obtains the empirical testing of the digital transformation on different property rights.Finally,the higher the level of digitalization,the higher the digital level,the more significantly promotes the performance of commercial banks.Finally,based on the above analysis,this article puts forward feasibility opinions on commercial banks and related regulators. 展开更多
关键词 Commercial banks Digital transformation Business performance property rights
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Inheritance,Innovation and High-quality Development of Herbaceous Edible Oils in Hubei Province under the Strategy of Strengthening the Country with Intellectual Property 被引量:4
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作者 Li GAO Yuanpeng SUN +2 位作者 Jin ZENG Jianjun ZHANG Zhiguo SUN 《Asian Agricultural Research》 2023年第12期5-15,共11页
Only by improving the production capacity of domestic herbal edible oil can China ensure the safety of the supply chain of the important industrial chain of vegetable edible oil in China and practice the big food conc... Only by improving the production capacity of domestic herbal edible oil can China ensure the safety of the supply chain of the important industrial chain of vegetable edible oil in China and practice the big food concept.In addition to rice,maize,and soybean for using as grain and oil,there are eight kinds of herbaceous edible oil crops in Hubei Province,including rape,peanut,sesame,sunflower,perilla(perilla seed),cotton,linen and tiger nut(Cyperus esculentus).This paper studies the main industries of herbaceous edible oil crops and their intellectual property resources in Hubei Province,and analyzes the main problems of its inheritance,innovation and high-quality development under the strategy of strengthening the country with intellectual property.Finally,it proposes the countermeasures of carrying forward and inheriting traditional knowledge and traditional culture,maintaining the biodiversity of crops,strengthening the creation of new plant varieties and breeding patents,and opening up the whole chain of intellectual property rights. 展开更多
关键词 HERBACEOUS EDIBLE OIL crops Vegetable EDIBLE OIL Big food concept INTELLECTUAL property right HUBEI Province
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Multi-Objective Optimization of Fused Deposition Modeling for Mechanical Properties of Biopolymer Parts Using the Grey-Taguchi Method
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作者 Kapil Kumar Hari Singh 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2023年第1期51-64,共14页
The urgent need to develop customized functional products only possible by 3D printing had realized when faced with the unavailability of medical devices like surgical instruments during the coronavirus-19 disease and... The urgent need to develop customized functional products only possible by 3D printing had realized when faced with the unavailability of medical devices like surgical instruments during the coronavirus-19 disease and the ondemand necessity to perform surgery during space missions.Biopolymers have recently been the most appropriate option for fabricating surgical instruments via 3D printing in terms of cheaper and faster processing.Among all 3D printing techniques,fused deposition modelling(FDM)is a low-cost and more rapid printing technique.This article proposes the fabrication of surgical instruments,namely,forceps and hemostat using the fused deposition modeling(FDM)process.Excellent mechanical properties are the only indicator to judge the quality of the functional parts.The mechanical properties of FDM-processed parts depend on various process parameters.These parameters are layer height,infill pattern,top/bottom pattern,number of top/bottom layers,infill density,flow,number of shells,printing temperature,build plate temperature,printing speed,and fan speed.Tensile strength and modulus of elasticity are chosen as evaluation indexes to ascertain the mechanical properties of polylactic acid(PLA)parts printed by FDM.The experiments have performed through Taguchi’s L27orthogonal array(OA).Variance analysis(ANOVA)ascertains the significance of the process parameters and their percent contributions to the evaluation indexes.Finally,as a multiobjective optimization technique,grey relational analysis(GRA)obtains an optimal set of FDM process parameters to fabricate the best parts with comprehensive mechanical properties.Scanning electron microscopy(SEM)examines the types of defects and strong bonding between rasters.The proposed research ensures the successful fabrication of functional surgical tools with substantial ultimate tensile strength(42.6 MPa)and modulus of elasticity(3274 MPa). 展开更多
关键词 Fused deposition modeling Mechanical properties Taguchi method ANOVA Grey relational analysis SEM
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Model investigation of the low-carbon MgO-treated soil foundation based on CO_(2) overall carbonation
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作者 Guanghua Cai Songyu Liu +2 位作者 Yuqing Zhong Chisun Poon Jiangshan Li 《Journal of Rock Mechanics and Geotechnical Engineering》 SCIE CSCD 2023年第11期2901-2916,共16页
The overall carbonation of MgO-admixed soil provides not only an efficient and environmentally friendly technique for improving soft ground but also a permanently safe solution for CO_(2) sequestration.To evaluate the... The overall carbonation of MgO-admixed soil provides not only an efficient and environmentally friendly technique for improving soft ground but also a permanently safe solution for CO_(2) sequestration.To evaluate the carbon sequestration potential and promote the carbonation application in soil improvement,a laboratory-scale model investigation is designed under pressurized carbonation considering the influences of MgO dosage and CO_(2) ventilation mode(way).The temperature,dynamic resilience modulus,and dynamic cone penetration(DCP)were tested to assess the carbonation treatment effect.The physical,strength,and microscopic tests were also undertaken to reveal the evolution mechanisms of CO_(2) migration in the MgO-carbonated foundation.The results indicate that the temperature peaks of MgO-treated foundation emerge at w20 h during hydration,but occur at a distance of 0e25 cm from the gas source within 6 h during carbonation.The dynamic resilience moduli of the model foundation increase by more than two times after carbonation and the DCP indices reduce dramatically.As the distance from the gas inlet increases,the bearing capacity,strength,and carbon sequestration decrease,whereas the moisture content increases.Compared to the end ventilation,the middle ventilation produces a higher carbonation degree and a wider carbonation area.The cementation and filling of nesquehonite and dypingite/hydromagnesite are verified to be critical factors for carbonation evolution and enhancing mechanical performances.Finally,the overall carbonation model is described schematically in three stages of CO_(2) migration.The outcomes would help to facilitate the practical application of CO_(2) sequestration in soil treatment. 展开更多
关键词 model investigation Overall carbonation Reactive MgO Engineering properties Microscopic characteristics
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Multiscale tensegrity model for the tensile properties of DNA nanotubes
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作者 Hanlin LIU Nenghui ZHANG Wei LU 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI CSCD 2023年第3期397-410,共14页
DNA nanotubes(DNTs)with user-defined shapes and functionalities have potential applications in many fields.So far,compared with numerous experimental studies,there have been only a handful of models on the mechanical ... DNA nanotubes(DNTs)with user-defined shapes and functionalities have potential applications in many fields.So far,compared with numerous experimental studies,there have been only a handful of models on the mechanical properties of such DNTs.This paper aims at presenting a multiscale model to quantify the correlations among the pre-tension states,tensile properties,encapsulation structures of DNTs,and the surrounding factors.First,by combining a statistical worm-like-chain(WLC)model of single DNA deformation and Parsegian's mesoscopic model of DNA liquid crystal free energy,a multiscale tensegrity model is established,and the pre-tension state of DNTs is characterized theoretically for the first time.Then,by using the minimum potential energy principle,the force-extension curve and tensile rigidity of pre-tension DNTs are predicted.Finally,the effects of the encapsulation structure and surrounding factors on the tensile properties of DNTs are studied.The predictions for the tensile behaviors of DNTs can not only reproduce the existing experimental results,but also reveal that the competition of DNA intrachain and interchain interactions in the encapsulation structures determines the pre-tension states of DNTs and their tensile properties.The changes in the pre-tension states and environmental factors make the monotonic or non-monotonic changes in the tensile properties of DNTs under longitudinal loads. 展开更多
关键词 DNA nanotube(DNT) multiscale model tensegrity structure pre-tension state tensile property
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Why The Constitution Should Protect Personal Credit Information?——An Approach of Right Argumentation
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作者 李艺 SU Yilon 《The Journal of Human Rights》 2023年第2期328-346,共19页
Protecting personal credit information through constitutional rights is not only essemtial for individuals to defend against infringements on their personal credit information rights and interests by public power in t... Protecting personal credit information through constitutional rights is not only essemtial for individuals to defend against infringements on their personal credit information rights and interests by public power in the social credit system,but also a requirement for unified legislation on social credit to explore the basis for constitutional norms.In the era of the credit economy,personal credit information has become a vital resource for realizing personal autonomy.Along with the increase in the state’s supervision and control of personal credit,the realization of the autonomous value in the interests related to personal credit information has also set more obligations for the state.Therefore,interests related to personal credit information should be regarded as a constitutional right.Because of its significant economic interest and value,the right to personal credit information should be classified as a constitutional property right.As a constitutional property right,the right to personal credit information can not only help protect people’s economic interests,but also achieve the goal of safeguarding their personality interests. 展开更多
关键词 right to personal credit information constitutional rights social and economic rights property rights
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A thermochemical model description of CaO_(2)-SiO2-Al_(2)O_(3) silicate system
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作者 Qiu-lin Wen Feng-man Shen +3 位作者 Hai-yan Zheng Yun-bao Gao Yu Wang Yan-chun Lou 《China Foundry》 SCIE EI CAS CSCD 2023年第6期480-490,共11页
A thermochemical model based on the ion and molecule coexistence theory(IMCT)was developed to calculate thermodynamic data in the CaO-SiO_(2)-Al_(2)O_(3) slag system,considering the influential role of oxide activitie... A thermochemical model based on the ion and molecule coexistence theory(IMCT)was developed to calculate thermodynamic data in the CaO-SiO_(2)-Al_(2)O_(3) slag system,considering the influential role of oxide activities on the thermodynamic properties of slags.Using this model,iso-activity contours were obtained for oxide components CaO,SiO_(2) and Al2O3 in this system at temperatures of 1,873 K and 1,773 K.When compared with the IMCT model,it is found that the predicted activities of oxide components in the CaO-SiO_(2)-Al_(2)O_(3) system using the model developed in this study better matches experimental data from literature in terms of both trend and numerical value.Therefore,the model developed in this study can serve as a robust modeling tool for metallurgical processes,and the thermodynamic data predicted by this new model can be used to improve the metallurgical technology. 展开更多
关键词 thermochemical model CaO-SiO_(2)-Al_(2)O_(3)slag system thermodynamic properties molecule coexistence theory
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A Conceptual Model of Our Universe Derived from the Fine Structure Constant (α)
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作者 John R. Crary 《American Journal of Computational Mathematics》 2023年第4期524-532,共9页
The Fine Structure Constant (α) is a dimensionless value that guides much of quantum physics but with no scientific insight into why this specific number. The number defines the coupling constant for the strength of ... The Fine Structure Constant (α) is a dimensionless value that guides much of quantum physics but with no scientific insight into why this specific number. The number defines the coupling constant for the strength of the electromagnetic force and is precisely tuned to make our universe functional. This study introduces a novel approach to understanding a conceptual model for how this critical number is part of a larger design rather than a random accident of nature. The Fine Structure Constant (FSC) model employs a Python program to calculate n-dimensional property sets for prime number universes where α equals the whole number values 137 and 139, representing twin prime universes without a fractional constant. Each property is defined by theoretical prime number sets that represent focal points of matter and wave energy in their respective universes. This work aims to determine if these prime number sets can reproduce the observed α value, giving it a definable structure. The result of the FSC model produces a α value equal to 137.036, an almost exact match. Furthermore, the model indicates that other twin prime pairs also have a role in our functional universe, providing a hierarchy for atomic orbital energy levels and alignment with the principal and azimuthal quantum numbers. In addition, it construes stable matter as property sets with the highest ratio of twin prime elements. These results provide a new perspective on a mathematical structure that shapes our universe and, if valid, has the structural complexity to guide future research. 展开更多
关键词 Fine Structure Constant Conceptual model Prime Numbers property Sets Quantum PHYSICS UNIVERSE
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Construction of China Osmanthus City and Intellectual Property Right Protection in Xianning City in the Context of Three New Developments 被引量:12
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作者 Li GAO Zhiguo SUN +2 位作者 Yueqiu HE Jiandong LAI Hongguo CHEN 《Asian Agricultural Research》 2022年第9期1-6,15,共7页
Xianning City of Hubei Province is one of the five major traditional osmanthus producing areas in the world and the hometown of osmanthus in China. Xianning is constructing China Osmanthus City in the whole city. This... Xianning City of Hubei Province is one of the five major traditional osmanthus producing areas in the world and the hometown of osmanthus in China. Xianning is constructing China Osmanthus City in the whole city. This paper first introduces the main characteristics of the osmanthus industry in Xianning City, and analyzes the characteristics of traditional knowledge, biological genetic resources, new plant varieties, patents, geographical indications, and trademarks. Then, it studies the intellectual property resources of the osmanthus industry, and analyzes the main problems existing in the construction of China Osmanthus City and intellectual property right protection. Finally, it comes up with constructive recommendations including applying for China and Globally Important Agricultural Heritage Systems, developing colored-leaf osmanthus varieties, creating a regional public brand of osmanthus specialty products, and building a new development pattern of osmanthus industry. 展开更多
关键词 China Osmanthus City Three new developments(new development stage philosophy and paradigm) OSMANTHUS Intellectual property right High-quality development
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The Impact of Changes of Property Rights on Farmland Use:An Empirical Study of China during Transition 被引量:1
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作者 Chen Zhigang Qu Futian Wang Qing 《Chinese Journal of Population,Resources and Environment》 北大核心 2007年第1期26-32,共7页
In China, farmland property rights characterized by the household-responsibility system (HRS) have been improved since the reform and opening-up. The rights of use, transfer and gain become more stable, authorized and... In China, farmland property rights characterized by the household-responsibility system (HRS) have been improved since the reform and opening-up. The rights of use, transfer and gain become more stable, authorized and complete. This paper firstly analyzes the impact on farmland productivity, which comes from the improvement of farmland property rights. Then, an economet- ric model is built to test the above analysis. It concludes that changes of property rights will affect farmland performance in China. In the end, some policy implications are explored for fur- ther reforms. 展开更多
关键词 property rights institutional changes farmland use China
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Thermodynamic property of ternary compound MgCaSi: A study from ab initio Debye-Grüneisen model 被引量:1
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作者 Rui Wu Ya-Ping Wang +2 位作者 Lin Shao Wei Wang Bi-Yu Tang 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2021年第12期315-322,共8页
The thermodynamic properties of Mg Ca Si and its mother phase Ca2 Si are comparatively investigated from ab initio calculations and quasi-harmonic Debye-Grüneisen model. At 0 K, Mg Ca Si is more thermodynamically... The thermodynamic properties of Mg Ca Si and its mother phase Ca2 Si are comparatively investigated from ab initio calculations and quasi-harmonic Debye-Grüneisen model. At 0 K, Mg Ca Si is more thermodynamically stable. Under high temperature, the advantage of higher thermodynamically stability of Mg Ca Si is reduced, originating from the less negative entropy contribution because the thermodynamic entropy of Mg Ca Si increases more slowly with temperature and the entropy values are slightly smaller.With increasing temperature, the anti-softening ability for Mg Ca Si is slightly smaller due to the slightly faster decrease trend of bulk modulus than that of Ca2 Si, although the bulk modulus of Mg Ca Si is higher in the whole temperature range considered. The thermal expansion behaviors of both Mg Ca Si and Ca_(2)Si exhibit similar increase trend, although thermal expansion coefficient of MgCaSi is slightly lower and the increases is slightly slower at lower temperature. The isochoric heat capacity CVand isobaric heat capacity CPof MgCaSi and Ca_(2)Si rise nonlinearly with temperature, and both CVare close to the Dulong–Petit limit at high temperature due to the negligibly small electronic contribution. The Debye temperature of both phases decrease with increasing temperature, and the downtrend for Mg Ca Si is slightly faster.However, MgCaSi possess slightly higher Debye temperature, implying the stronger chemical bonds and higher thermal conductivity than the mother phase Ca_(2)Si. The Grüneisen parameter of MgCaSi and Ca_(2)Si increase slightly with temperature, the values of MgCaSi are slightly larger. The investigation of electronic structures shows that with substitution of partial Ca by Mg in Ca_(2)Si, the stronger MgASi,MgACa and SiASi covalent bonds are formed, and plays a very significant role for the structural stability and mechanical properties. 展开更多
关键词 MgCaSi alloys Density functional theory thermodynamic properties Structural stabilities Quasi-harmonic Debye-Grüneisen model
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The Application of Remote Sensing Monitoring Method and Groundwater Model for Water Rights Management in Haihe River basin
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作者 Lijuan Xue~1,Xinjun Zhu~(1,2),Songqiu Bo~3,Jianxin Li~3,Wei Li~3,Wei Yang~1 1.Tianjin Lonwin Network Science & Technology Development Co.Ltd,Tianjin 300181,China. 2.Key Laboratory of Water Cycle and Related land Surface Processes,Institute of Geographic Sciences and Natural Resources Research,Chinese Academy of Science,Beijing 100101,China 3.Haihe River Water Conservancy Commission of Ministry of Water Resources,Tianjin 300170,China 《地学前缘》 EI CAS CSCD 北大核心 2009年第S1期26-26,共1页
Groundwater is an important water resource in Haihe River basin,North China.The number of aquifers that appear to be declining under conditions of groundwater overdraft is increasing.To effectively manage the water re... Groundwater is an important water resource in Haihe River basin,North China.The number of aquifers that appear to be declining under conditions of groundwater overdraft is increasing.To effectively manage the water resources,there is a strong scientific need to analyze the net use of this important water resource and to quantify the water rights allocation for improved understanding of the future water 展开更多
关键词 REMOTE sensing monitoring GROUNDWATER model water rightS net GROUNDWATER use Haihe RIVER BASIN
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The Innovation and Plights of Farmland Property Rights System Reform in Chongqing Municipality
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作者 ZHENG Cai-gui1,ZHANG Xiao-cheng1,HE Jiang-hua2,LI Ji-zhuang1,LIANG Qi-xue1 1. Chongqing Institute of Land Surveying and Planning,Chongqing 400020,China 2. School of Management,Sichuan University of Arts and Science,Dazhou 635000,China 《Asian Agricultural Research》 2010年第4期57-60,共4页
Based on the background of national urban and rural comprehensive reform pilot area and the introduction of the profiles of research region and the data obtained by on-the-spot interview survey,the innovative models o... Based on the background of national urban and rural comprehensive reform pilot area and the introduction of the profiles of research region and the data obtained by on-the-spot interview survey,the innovative models of farmland property rights system reform in Chongqing are introduced by applying participatory rural appraisal methods and examples. The innovative models cover buying shares of contract management rights,transforming from farmers to townspeople and mortgaging contract management rights. The plights exist in the reform are analyzed,among which the plights of buying shares of contract management rights are introduced from the following five aspects:the conflict with the present land contract laws,the possible new round of massive scale land loses,the confounded functions of government and enterprise caused by risk transference and the difficulties of handling assets when the contract management rights expired. Besides,the plights of the transforming from rural residents to urban residents are analyzed from four aspects,which include the particularity of reform,high financial pressure,emergence of interbedded people and difficulties of payoff of village-based companies. From the facets of limited mortgage area,risks of reimbursing the loan,legal risks of mortgage. The results show that the stock purchasing model of contractual management rights reveals the capital value of land and the model is of theoretical and practical significance in law and economics. However,the social security system is not perfect,so the stock purchasing model of contractual management rights can not be expanded. In addition,the participation of more famers and the expansion of enterprises are limited as well. The land comprehensive reform model of transforming from rural residents to urban residents is of positive significance to the comprehensive exploration of farmland property system reform,but this kind of model should be supported by strong economy. The stock purchasing model of contractual management rights is of significance to perfect the contractual management rights,but it conflicts with the existing laws and financial systems. 展开更多
关键词 FARMLAND property rightS PARTICIPATORY rural appra
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Modelling the Violation of Restrictions Pertaining to Deforestation in a Given Land Right
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作者 Anthony G. Tumba Shahidah Bte Mohd Ariff 《Journal of Environmental Protection》 2015年第11期1219-1235,共17页
This paper develops a model that could be used to visualize and predict the violation of restrictions in a given forest. The violation of restriction in this case is assumed to be the difference in areal extent betwee... This paper develops a model that could be used to visualize and predict the violation of restrictions in a given forest. The violation of restriction in this case is assumed to be the difference in areal extent between two forest cover scenes with time;termed “deforestation”. It analyses the relationship in forest cover changes overtime in Ganye Forest Reserve and Glide Cross Country Farm in Adamawa state, Nigeria. Cadastral maps of the forest reserve and farmland were used as the base maps, while the satellite images served as the spatio-temporal data. Landsat ETM+ images of 2003, 2008 and 2013 were used to identify, determine and estimate the violation of restrictions. The result shows that the violation of restrictions could be reliably determined for both the forest reserve and farmland and forecast made in order to predict future occurrence. It also revealed a continuous deforestation in the forest reserve, while in the farmland regeneration of forest stock was noticed. This information is very vital for forest management, planning and decision making in a viable land administration domain. 展开更多
关键词 VIOLATION of Restrictions DEFORESTATION model LAND right
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