截捕“反网”鱼是提高网产的重要措施

“反网”亦称“炸箍”，是我地在成鱼捕捞驱赶鱼类途中，对鱼群因受惊向拦网外逃现象的俗称。惠亭水库渔场1982年利用“赶、拦、刺、张”渔法，第一网次捕捞成鱼18万斤，其中利用15米深的张网捕“反网”鱼11万斤，占网产的61％。第二网次捕捞成鱼10万斤，其中捕“反网”鱼5万斤，占网产的一半。实践证明：截捕反网鱼是提高网产的一条重要措施。

基于三重博弈的多微网-产消者群自适应鲁棒分布式协同优化

在多主体能源共享背景下,提出一种基于三重博弈的多微网-产消者群自适应鲁棒分布式协同优化。首先,构建三重博弈框架模拟多微网-产消者群的能源交易模型,即上层多微网系统合作博弈,各微网与其下层产消者群主从博弈,下层产消者群联盟合作博弈。其次,考虑到多微网系统内部受可再生能源出力、负荷功率随机性,外部受日前电价波动性等多重不确定性影响较大,各微网建立两阶段自适应鲁棒优化(adaptive robust optimization,ARO)模型,在第一阶段优化微网与外部主体的交易策略,包括与其他微网的合作博弈、与产消者群的主从博弈以及与配网日前电价的不确定性;在第二阶段基于多面体不确定集来决策微网内部源荷的不确定性,优化本地机组的调度策略。然后,对于各层合作博弈收益,采用改进纳什谈判模型对其进行分配。最后,采用一种可变惩罚参数交替方向乘子法-列与约束生成算法(variable penalty parameters alternating direction multiplier method-column and constraint generation,VPPADMM-C&CG)分布式求解三重博弈ARO模型,以保护各主体的隐私。通过不同博弈场景的算例结果对所提模型能够实现多微网-产消者群社会总成本最小化及效益最大化进行了验证,可为不确定环境下多微网-产消者群协同优化提供参考。

“网研产”教学新模式在构成设计课程中的应用

探讨了“网研产”教学新模式在构成设计课程中的应用策略。构成设计课程是艺术院校的一门专业基础课,分为平面构成、色彩构成和立体构成。“网研产”教学模式是通过网络进行授课,让教学内容通过设计落地,最后将设计生产成品,并通过网络进行销售的新型教学模式。通过提升学习兴趣、减少“挂课”现象,优化课堂内容、量化教学成果,课程中生产、生产中创业等方式,提出了“网研产”教学新模式与构成设计课程的融合路径,形成设计—制作—销售的学习和实践模式,更好地激发了学生的学习热情和积极性,有效提升了学生的实践技能和水平,使学生在校期间就能体验创业的过程,增加并积累创业经验。

新媒体与数字媒体专业产学一体化的多维探究

文章对应用型本科院校新媒体与数字媒体专业学研产一体化教育模式进行了系统多维研究,提出了新媒体与数字媒体专业产学一体化网络互动教育模式应由多维项目式教学、网络实验室建设、国际国内校企合作实践规划、产业化模型构成,总结了新媒体与数字媒体专业教育教学改革的初步实践经验。

网上个人理财

随着投资时代的来临,投资市场日益活跃,在机遇与风险并存的市场诱惑下,理财显得至关重要。然而理财是一个需要专业知识的行业,即使是在经济海洋中摸爬滚打的职业经理人,也难以在个人理财方面游刃有余。互联网的迅猛发展,使众多的理财网站应运而生,个人理财已逐步从“算盘+流水簿”的青铜器时代,进入了 e时代的网络理财。网上理财获得投资者青睐。

“互联网+”背景下传统企业如何转型

"互联网+"背景下,工业体量、网路基础建设、产网融合和政策支持等方面为传统企业转型奠定了良好的基础,但是传统企业也存在缺乏"互联网"思维、"互联网+"经营管理创新人才缺乏、基础建设重"端"轻"网(云)"、产网融合深度不够等问题,应加大政策支持力度,加强"互联网+"企业文化生态建设,外引内训复合型人才,加大企业信息化建设,通过产网互动探索产网融合新模式。

“产城融合”视角下园区的转型路径探析

当前中国的经济进入新常态,面临下行的压力,亟待转型,各级政府要保增速、调结构,这给产业园区带来了新的发展机遇——政府保增速,调结构,关键就是在于国内产业园区经济如何转型,如何实现高质量的园区发展。文章将"产城融合"相关理论和源于商业活动的园区转型业务实践相结合,从园区现状、存在问题分析传统园区转型的动因及路径,并结合招商蛇口在园区转型、产城融合、前港-中区-后城模式的实践,提出园区转型所需要具备的5种核心能力,即:政策研究能力、产业研究与发展能力、产品溢价能力、运营服务能力、资产管理能力。

China's Infrastructure Development and Supply-Side Structural Reforms

Despite significant improvements in transport, energy and information communication technology （ICT） infrastructures, inadequacies still exist in China＇s infrastructure development in light of emerging demand and industrial transition and upgrade. China lags far behind advanced economies such as the United States, Germany and Japan in terms of the quality of transport infrastructures except railroad,＂ electricity infrastructure is insufficient and service efficiency needs improvement; ICT infrastructure requires all-round upgrade and gaps in Internet bandwidth are striking. This paper suggests that, based on the needs of supply-side structural reform, China must reform its investment and financing systems to enhance the efficiency of infrastructure investment. Efforts must be made to enhance air transport and port infrastructure to support industrial upgrade; to develop the energy Internet to address emerging demands; and to forge a new generation of ICT infrastructure with industrial Internet as the priority to prepare China for the new round of industrial competition.

Application Research of Temperature Forecasts on Elman Neural Network

[Objective] The aim was to establish Elman neural network model to predict the dynamic changes of temperature. [Method] Considering the inherent nature of temperature, and dy dint of the temperature in Chongqing during 1951-2010, the Elman artificial neural network model was applied to predict the temperature. [Result] This simulation result suggested that the relative error was small and can have a good simulation to the future temperature changes. [Conclusion] The prediction result can guide agricultural production and further apply to the field of pricing the weather derivative products.

ALGORITHMS FOR TETRAHEDRAL NETWORK(TEN) GENERATION

The Tetrahedral Network(TEN) is a powerful 3-D vector structure in GIS, which has a lot of advantages such as simple structure, fast topological relation processing and rapid visualization. The difficulty of TEN application is automatic creating data structure. Although a raster algorithm has been introduced by some authors, the problems in accuracy, memory requirement, speed and integrity are still existent. In this paper, the raster algorithm is completed and a vector algorithm is presented after a 3-D data model and structure of TEN have been introducted. Finally, experiment, conclusion and future work are discussed.

AN INTEGRATED APPROACH FOR PRODUCTION-DISTRIBUTION NETWORK DEPLOYMENT

An integrated approach for new vehicle program launching and associated manufacturing systems deployment,is presented in this paper.To overcome weaknesses and difficulties in the traditional production distribution (PD) network models,the case based reasoning is first applied to generate an initial network configuration based on the collected localization case base.Secondly,and economic model of performance evaluation of existing manufacturing facilities is developed to identify the advantages in location sensitive production factors for various components in order to take full advantages of local and global production factors.Finally,a modified PD model is developed to optimize the overall network deployment.Various deployment scenarios,such as minimizing manufacturing cost,maximizing profitability or promotion of early market entry,can be analyzed and testified.A typical case study of launching a new vehicle program in China is also presented to demonstrate the effectiveness and feasibility of the proposed approach.

Assessment for Production and Operation Ability of Medium and Small-sized Enterprises Based on Neural Network

In order to improve production and operation ability of medium and small-sized enterprises, an assessment-index system of production and operation ability was proposed, and a corresponding assessment model was established based on BP neural network. The conjunction weights of the neural network were continuously modified from output layer to input layer in the process of neural network training to reduce the errors between the anticipated and actual outputs. The results from an example show that this method is reliable and feasible. The production and operation abilitv of an enterorise with assessed result of 0.833 is fairly oowerful, and that with assessed result of 0.644 is average.

City Networks of Online Commodity Services in China:Empirical Analysis of Tmall Clothing and Electronic Retailers

City networks have been a critical topic in the fields of urban geography and regional economics. Numerous studies have explored city networks, focusing mainly on infrastructure and industrial networks. Unlike traditional urban network of which the major measuring indexes are population sizes and entity industries, online commodity service networks could reflect well the influencing of emerging economies, especially the Internet economy, on city networks. This study analyzes and reveals structural features of China's city networks through online commodity services, providing the internet economic approach on city networks. Results indicate that the core cities of online commodity service networks are mainly concentrated in eastern coastal areas. In addition, spatial polarization and layer structure of network connections are obvious, descending from the centers in eastern China to peripheral cities in central and western China. Online commodity services of different cities show apparent differences and uncertainties in terms of specialization rates of international connection, which presents a tendency toward diversification. Online commodity service networks are not only associated with goods production, supply, and consumption in physical space but also reflect virtual information, capital, and technology flows, thus providing a new empirical approach for understanding city networks in information and internet economic age.

Impacts of Packet Collisions on Link Throughput in CSMA Wireless Networks

It is known that packet collisions in wireless networks will deteriorate system performance, hence substantial efforts have been made to avoid collision in multi-user access designs. Also, there have been many studies on throughput analysis of CSMA wireless networks. However, for a typical CSMA network in which not all nodes can sense each other, it is still not well investigated how link throughputs are affected by collisions. We note that in practical 802.11-like networks, the time is divided into mini-timeslots and packet collisions are in fact unavoidable. Thus, it is desirable to move forward to explore how collisions in such a network will affect system performance. Based on the collision-free ideal CSMA network(ICN) model, this paper attempts to analyze link throughputs when taking the backoff collisions into account and examine the effect of collisions on link throughputs. Specifically, we propose an Extended Ideal CSMA Network(EICN) model to characterize the collision effects as well as the interactions and dependency among links in the network. Based on EICN, we could directly compute link throughputs and collision probabilities. Simulations show that the EICN model is of high accuracy. Under various network topologies and protocol parameter settings, the computation error of link throughputs using EICN is kept to 4% or below. Interestingly, we find that unlike expected, the effect of collisions on link throughputs in a modest CSMA wireless network is not significant, which enriches our understanding on practical CSMA wireless networks such as Wi-Fi.

Analysis on Refinery System as a Complex Task-resource Network

Refinery system, a typical example of process systems, is presented as complex network in this paper. The topology of this system is described by task-resource network and modeled as directed and weighted graph, in which nodes represent various tasks and edges denote the resources exchanged among tasks. Using the properties of node degree distribution, strength distribution and other weighted quantities, we demonstrate the heterogeneity of the network and point out the relation between structural characters of vertices and the functionality of correspond- ing tasks. The above phenomena indicate that the design requirements and principles of production process contrib- ute to the heterogeneous features of the network. Besides, betweenness centrality of nodes can be used as an impor- tance indicator to provide additional information for decision making. The correlations between structure and weighted properties are investigated to further address the influence brought by production schemes in system con- nectivity patterns. Cascading failures model is employed to analyze the robustness of the network when targeted at- tack happens. Two capacity assignment strategies are compared in order to improve the robustness of the network at certain cost. The refinery system displays more reliable behavior when the protecting strategy considers heteroge- neous properties. This phenomenon further implies the structure-activity relationship of the refinery system and provides insightful suggestions for process system design. The results also indicate that robustness analysis is a _promising applicat!on of methodologies from complex networks to process system engineering..

Progress and Trends of China Wind Power

This paper reviews the progress and trend of out-of-grid and in-grid type of wind power at home in the recent years and points out that the out-of-grid type of wind power has entered a steady development of industrialization now and large generating units are speeding the tempo of localization. This paper also enumerates the current major wind power farm projects and forecasts the development trend in the several years to come.

Relationships and Evolving Networks of Rural Manufacturing Clusters: A Case Study in Yucheng County, Henan Province of China

The evolution of networks in rural industrial clusters,in particular in the context of China has been paid more attention to in the world.Applying the theory and techniques of social network analysis (SNA),this study is with particular regard to the business network relationships and their evolutionary dynamics of steel measuring tape manufacturing clustered in Nanzhuang Village,Yucheng County of Henan Province,China,which is important for better understanding the industrial and regional development in less developed rural areas.From data collected by comprehensive questionnaire survey in 2002 and mass interviews with 60 enterprises and assembling families and several government authorities in 2002,2003,2004,2005 and 2008,four types of networks are identified: spin-off,consulting,communication and cooperative.The characteristic of these networks is outlined in detail.Compared with the high-tech clusters of typical developed areas,the networks that have evolved in traditional manufacturing clusters are more affected by emotive linkages.The cluster networks are shown to exhibit a polycentric hierarchical structure.The family relationships are the dominate spin-off channels of enterprises,while the supply and demand relationships and the mobility of the skilled workers are also important paths of network learning,and the cooperation relationships are comparatively stable.Besides the root enterprises,the middle-sized enterprises are comparatively more active than small-sized enterprises,and the intermediary agencies and the service institutions act as bridges of the inter-enterprises cooperation.By analysis of the structure of networks and the interactions between the networks,the four stages of network evolution are also identified.The four stages are dominated by the family networks,the internal division production networks,the local innovation networks and the global supply networks respectively,and they play different roles in cluster development.

Analysis of coverage problem under border effects in wireless sensor networks

Wireless sensor networks can be used to monitor the interested region by deploying dense sensor nodes. Coverage is a primary metric to evaluate the capacity of monitoring. In this paper, we focus on the coverage problem under border effects, where the sensor nodes are distributed in a circle-shaped region randomly. Under this scenario, we derive the expected coverage of the sensor node and the total network coverage provided by n sensor nodes accurately by probability. These findings are useful to determine the related parameters （sensing range, number of sensor nodes and radius of monitored region） for a specific network coverage ratio. Simulation results demonstrate that our analysis is correct and effective.

Hybrid Surface Mesh Adaptation for Climate Modeling

Solution-driven mesh adaptation is becoming quite popular for spatial error control in the numerical simulation of complex computational physics applications,such as climate modeling.Typically,spatial adaptation is achieved by element subdivision (h adaptation) with a primary goal of resolving the local length scales of interest.A sec- ond,less-popular method of spatial adaptivity is called'mesh motion'(r adaptation); the smooth repositioning of mesh node points aimed at resizing existing elements to capture the local length scales.This paper proposes an adaptation method based on a combination of both element subdivision and node point repositioning (rh adaptation). By combining these two methods using the notion of a mobility function,the proposed approach seeks to increase the flexibility and extensibility of mesh motion algorithms while providing a somewhat smoother transition between refined regions than is pro- duced by element subdivision alone.Further,in an attempt to support the requirements of a very general class of climate simulation applications,the proposed method is de- signed to accommodate unstructured,polygonal mesh topologies in addition to the most popular mesh types.

Review of the Development of China's Mobile Broadband Networks

The year of 2014 saw the beginning of China's LTE,which marks that China has become one of the major engines for the global LTE development.China dazzled in the construction of LTE networks,subscribers,and industry chain.However,the policy formulated around TD-LTE also put China in predicament and brought it many challenges.With this article,we are going to put China's market for mobile broadband networks into perspective,focusing on the development of China's LTE market,challenges that encountered,and the research in this area in the years to come.Besides,in regards to the problems that already appeared,we will,from policy-making,industry-level,and technological points of view,offer our suggestions on how China should do to make this market robust.