The Construction and Competitiveness of Operation Model of Agricultural Industrial Cluster

Through reviewing the viewpoints of former scholars, the connotation and features of supply chain of agricultural industrial cluster are introduced. The agricultural industrial cluster model constituted by core network and supporting network is constructed. Three operation models of this kind of supply chain is described: the model takes wholesale market of agricultural products as the core; the model take pillar industries of agricultural industrialization as core; model takes the chains of retail enterprises as core. The competitiveness of agricultural industrial cluster is researched. The research assumes that the competiveness of supply chain of agricultural industrial cluster is mainly represented to make the agricultural industrial cluster to acquire more capabilities in terms of innovation and knowledge sharing capability, resource allocation capability, agile market adaptability and distinct value creation capability.

A Multi-case Study of Community Supported Agriculture (CSA) Operation Model in Beijing

As one of the ways to localize foods,community supported agriculture can strengthen food safety and should be reasonably guided and developed.Based on the analysis of the spatial layout of the community supported agriculture organizations in Beijing,this paper described the development framework and course of community supported agriculture in Beijing.Combining 3 differentiated cases with the consumer's participation in community supported agriculture and the trust mechanism,it was found that the drive type has a very significant impact on the characteristics of these organizations.

Business Models,Operation Models and Service Development of IPTV

IPTV,as a newborn service,is restricted on market operation by multiple factors. Therefore,exploration is required in respect of its business,operations and service provision models. First,an IPTV industry value chain can be formed by integrating the advantages of the existing business models of telecommunication,broadcasting and TV,and Internet industries,which helps realize win-win cooperation of all the parties on the chain. Second,plans for technology implementation and network deployment should be made after comprehensive consideration according to various development stages of the IPTV. Third,a reasonable profit allocation model may promote the growth of IPTV services. Last,market competitiveness will be improved by services bundling. Generally,IPTV will become a breakthrough point for the strategic transformation of telecom operators and meet their innovation demands. Therefore,IPTV is expected to be a promising technology helping telecom operators find more growth space in the information communication market.

Triptych Knowledge—Skills—Payroll and Business Performance: Application of an Operational Model for an Accounting Rating of the Human Capital in the Area of Distribution

The human capital’s accounting could allow companies to better manage the acquired knowledge and the skills developed by the employees when they join the firm.An operational model,suitable for a business enterprise’s HR manager and validated by its headboard,needs to include the employees’expertise and skills relative to their“cost”for the employer—the wage bill—and an assessment of the commercial performance.The human capital’s valuation includes methodological issues.Besides,the notion of human capital seems hardly understandable as a whole:The human capital gathers nevertheless components,such as knowledge—skills for which a first valuation can be proposed to test an accounting evaluation model for the operational human capital.In a perspective of a responsible management and a good HR policy,the method used must be able to better manage the knowledge and the competences employees acquired by accompanying them with the appropriate human resource management practices.This paper aims to show that the accounting valuation of human capital can become a tool in order to manage the knowledge and skills acquired and able to support a company’s human resources policy while being useful to its commercial performance—here in the distribution sector.In a research-intervention frame led in a responsible group,we use a model based on a triptych—wage bill,knowledge,and skills—to evaluate the human capital’s accounting,with an analytical highlight on the components measurement of the used“knowledge”and“skills”indexes in particular.A reflection on the operational model’s enrichment is proposed.

WEB-BASED VIRTUAL CNC MACHINE MODELING AND OPERATION

A CNC simulation system based on intemet for operation training of manufacturing facility and manufacturing process simulation is proposed. Firstly, the system framework and a rapid modeling method of CNC machine tool are studied under the virtual environment based on PolyTrans and CAD software. Then, a new method is proposed to enhance and expand the interactive ability of virtual reality modeling language（VRML） by attaining communication among VRML, JavaApplet, JavaScript and Html so as to realize the virtual operation for CNC machine tool. Moreover, the algorithm of material removed simulation based on VRML Z-map is presented. The advantages of this algorithm include less memory requirement and much higher computation. Lastly, the CNC milling machine is taken as an illustrative example for the prototype development in order to validate the feasibility of the proposed approach.

Uncertain optimal model and solving method to platform scheduling problem in battlefield

The platform scheduling problem in battlefield is one of the important problems in military operational research.It needs to minimize mission completing time and meanwhile maximize the mission completing accuracy with a limited number of platforms.Though the traditional certain models obtain some good results,uncertain model is still needed to be introduced since the battlefield environment is complex and unstable.An uncertain model is prposed for the platform scheduling problem.Related parameters in this model are set to be fuzzy or stochastic.Due to the inherent disadvantage of the solving methods for traditional models,a new method is proposed to solve the uncertain model.Finally,the practicability and availability of the proposed method are demonstrated with a case of joint campaign.

Comparisons of Three-Dimensional Variational Data Assimilation and Model Output Statistics in Improving Atmospheric Chemistry Forecasts

Atmospheric chemistry models usually perform badly in forecasting wintertime air pollution because of their uncertainties. Generally, such uncertainties can be decreased effectively by techniques such as data assimilation（DA） and model output statistics（MOS）. However, the relative importance and combined effects of the two techniques have not been clarified. Here,a one-month air quality forecast with the Weather Research and Forecasting-Chemistry（WRF-Chem） model was carried out in a virtually operational setup focusing on Hebei Province, China. Meanwhile, three-dimensional variational（3 DVar） DA and MOS based on one-dimensional Kalman filtering were implemented separately and simultaneously to investigate their performance in improving the model forecast. Comparison with observations shows that the chemistry forecast with MOS outperforms that with 3 DVar DA, which could be seen in all the species tested over the whole 72 forecast hours. Combined use of both techniques does not guarantee a better forecast than MOS only, with the improvements and degradations being small and appearing rather randomly. Results indicate that the implementation of MOS is more suitable than 3 DVar DA in improving the operational forecasting ability of WRF-Chem.

Developing an intermediate-complexity projection model for China's fisheries:A case study of small yellow croaker(Larimichthys polyactis)in the Haizhou Bay,China

Projection models are commonly used to evaluate the impacts of fishing.However,previously developed projection tools were not suitable for China’s fisheries as they are either overly complex and data-demanding or too simple to reflect the realistic management measures.Herein,an intermediate-complexity projection model was developed that could adequately describe fish population dynamics and account for management measures including mesh size limits,summer closure,and spatial closure.A two-patch operating model was outlined for the projection model and applied to the heavily depleted but commercially important small yellow croaker(Larimichthys polyactis)fishery in the Haizhou Bay,China,as a case study.The model was calibrated to realistically capture the fisheries dynamics with hindcasting.Three simulation scenarios featuring different fishing intensities based on status quo and maximum sustainable yield(MSY)were proposed and evaluated with projections.Stochastic projections were additionally performed to investigate the influence of uncertainty associated with recruitment strengths and the implementation of control targets.It was found that fishing at FMSY level could effectively rebuild the depleted stock biomass,while the stock collapsed rapidly in the status quo scenario.Uncertainty in recruitment and implementation could result in variabilities in management effects;but they did not much alter the management effects of the FMSY scenario.These results indicate that the lack of science-based control targets in fishing mortality or catch limits has hindered the achievement of sustainable fisheries in China.Overall,the presented work highlights that the developed projection model can promote the understanding of the possible consequences of fishing under uncertainty and is applicable to other fisheries in China.

A Study on the Operating Model of Internet + QQ Farm

The'Internet+QQ farm'creative agriculture presented in this paper is the innovation based on the currently booming reality QQ farm,aimed at reducing cost,improving efficiency and optimizing human and material resource elements.It can make Internet provide technical support for intelligence-based life,leisure,entertainment,with good prospects for development.

Solving the Jaynes-Cummings Model with Shift Operators Constructed by Means of the Matrix-Diagonalizing Technique

The Jaynes-Cummings model is solved with the raising and lowering（shift） operators using the matrix-diagonalizing technique. Bell nonlocality is also found to be present ubiquitously in the excitation states of the model.

CONSTRUCTION AND MODIFICATION OF FLEXIBLE FEATURE-BASED MODELS

A new approach is proposed to generate flexible featrure based models (FFBM), which can be modified dynamically. BRep/CSFG/FRG hybrid scheme is used to describe FFBM, in which BRep explicitly defines the model, CSFG (Constructive solid feature geometry) tree records the feature based modelling procedure and FRG (Feature relation graph) reflects different knids of relationship among features. Topological operators with local retrievability are designed to implement feature addition, which is traced by topological operation list (TOL) in detail. As a result, FFBM can be modified directly in the system database. Related features' chain reactions and variable topologies are supported in design modification, after which the product information adhering on features will not be lost. Further, a feature can be modified as rapidly as it was added.

工程理念的形成、操作化及其层次——再论工程理念

工程理念是关于工程活动的顶层设计的灵魂,是人们从实践中不断总结和升华的,是关于工程存在总体性特征的理性认识和自觉追求。作为工程造物活动过程中的一种实践智慧,工程理念经历了从科学认识到工程实践的演化。工程理念操作化过程,通常是通过实践模型的方式发生作用的。一般地,这种模型又根据工程造物的规模在宏观、中观、微观三个层次发挥引导和约束作用。

英语专业口语课程测试的模式设计

本文应用语言测试理论和民族志学的研究方法,针对当前英语专业口语课考试的主要问题,对英语专业学生应该考核的英语口语能力和水平做了科学界定,提出了由八项观测参数组成的多维检测语言表达准确性、流利性和得体性的英语口语课程考试理论模式.

Modeling and Operation of the Power-to-Gas System for Renewables Integration: A Review

Power-to-Gas(P2G)plays an important role in enhancing large-scale renewable energy integration in power systems.As an emerging inter-disciplinary subject,P2G technology requires knowledge in electrochemistry,electrical engineering,thermodynamic engineering,chemical engineering and system engineering.Aiming at P2G modeling and operational problems concerning the research field of power systems and the energy internet,this paper briefly reviews the main technologies and application potentials of the P2G system,and makes systematic summaries of major progresses related to P2G’s integration into the power grid in a bottom-top manner,including the modeling of high/room-temperature electrolysis cells,steady-state/dynamic optimization control of the P2G system,P2G’s integrated model and operational strategies at the grid level.In the final part of this paper,suggestions are put forward on future research directions of P2G systems from the aspects of modeling and operational optimization.

重新审视繁文缛节:概念和测量及其三维控制模型

近年来,繁文缛节在学界和管理实践中受到关注和重视的同时也存在某些分歧,厘清其概念内涵对于深化相关研究十分必要。本文从繁文缛节的词源解析出发,基于"有益说—有害说""功能功效说—心理过程模型""客观说—主观说"三种不同视角对繁文缛节观点进行分析讨论,立足学术研究和现实场域对其概念进行科学界定,并对繁文缛节与行政负担、行政延迟、正式化等相关概念进行比较分析,进一步明确了繁文缛节的概念内涵和外延。同时,总结介绍了繁文缛节的概念操作化及其测量,提出繁文缛节三维控制理论模型。最后,结合当前研究进展,提出繁文缛节未来研究的关键领域,并对其在中国的应用前景进行了讨论。文章为繁文缛节研究的理论演进及实践管理者提供了重要的理论基础。

基于模型的知识建模语言

一、基于模型的知识工程方法 基于知识的系统(KBS)作为复杂软件系统,其自身及开发程遵循一定准则。早期的KBS构造基于快速原型法,即将获取的知识立即转换实现为相应的软系统,通过系统运行的反馈信息去评估。

平潭海域精细化三维温盐流业务化数值预报系统

根据平潭附近海域实际需求和地理区位特点,研发了三维温、盐、流高分辨率业务化数值预报系统,对该系统采用的模式、配置、预报结果验证和业务化运行等情况进行了详细介绍。该系统基于ROMS海流模式,采用正交曲线网格和网格嵌套技术;建立了包含数据预处理、温盐流预报和预报产品后处理等子程序的业务化数值预报系统。结果表明:模式预报产品具有较高精度,整个业务流程运行在30 min之内,系统运行稳定,达到业务化预报的要求。

An optimized numerical method to pre-researching the performance of solid-phase oxygen control in a non-isothermal lead–bismuth eutectic loop

In the present work,a new transient calculation method for parameters that can be used to evaluate the ability of oxygen control in a non-isothermal lead-bismuth eutectic(LBE)loop with solid-phase oxygen control was proposed.It incorporates the dissolution process of PbO particles and the oxygen mass transfer process,and an optimized method was used for finding out the optimized oxygen mass transfer coefficient.In numerical terms,three mass transfer models were simultaneously applied,and comparisons of calculated and experimental results from the CRAFT loop indicated that the optimized calculation method and these new oxygen mass transfer models were correct and applicable to other LBE loops.Through this calculation method,we aimed to optimize prediction of the distribution of oxygen and iron concentrations,time taken to establish the steady state of oxygen,and maximum dissolution/precipitation rates of corrosion products and corrosion depth across the entire LBE loop.We hope that this work will provide a potential reference for designing a more intelligent oxygen control system in the future.

SYSTEMATIC FORECAST ERROR IN U.S.NMC OPERATIONAL SPECTRAL MODEL

The distribution of monthly mean error of NMC model forecasts and its seasonal variation are investi- gated.The ratio of monthly mean error to standard deviation is used here to find out that the region where a correction of systematic error is needed and appropriate is mainly in low latitudes.The improvement,after the model's vertical resolution and some physical parameters were changed from April 1985,is investigated,and the NMC operational model forecasts have also compared with those of ECMWF.

Spectrum of the Operator Corresponding to the M/M/1 Queueing Model with Vacations and Multiple Phases of Operation and Application

We describe the point spectrum of the operator which corresponds to the M/M/1 queueing model with vacations and multiple phases of operation.Then by using this result we prove that the essential growth bound of the C0-semigroup generated by the operator is 0,the C0-semigroup is not compact,not eventually compact,even not quasi-compact.Moreover,we verify that it is impossible that the time-dependent solution of the M/M/1 queueing model with vacations and multiple phases of operation exponentially converges to its steady-state solution.In addition,we obtain the spectral radius and essential spectral radius of the C0-semigroup.Lastly,we discuss other spectrum of the operator and obtain a set which belongs to the union of its continuous spectrum and residual spectrum.