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2008年中国投影机市场整体出货量达到68万台,销售额为67.1亿元人民币。尽管出货量比2007年上涨了24.6%,但是市场竞争激烈导致投影机单价锐减,销售额仅比2007年上涨9.3个百分点。"文化共享"项目的大规模开展,为投影机市场带来了新的动力。2009年中国投影机市场出货量将比2008年增长15.3%,市场规模将达到78万余台。2008年至2013年的年复合增长率将达到24.2%。 相似文献
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2008年第一季度中国投影机市场整体出货量为100,442台,销售额为10.6亿元人民币(约合1.5亿美元),分别比去年同期上涨了20.8%和4.8%。大规模的教育行业集中采购在2007年底已基本完成。加上受春节假期的影响,2008年第一季度中国投影机市场增速大幅降低。尽管如此,教育行业仍将继 相似文献
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IDC最新发布的中国投影机市场季度跟踪报告显示,2008年第二季度中国投影机市场整体出货量为148,737台,销售额为15.1亿元人民币(约合2.2亿美元),分别比去年同期上涨37.7%和21.0%.…… 相似文献
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中国投影机市场前景良好 总被引:1,自引:0,他引:1
2008年第二季度中国投影机市场全面回暖,发展前景良好IDC最新发布的中国投影机市场季度跟踪报告显示,2008年第二季度中国投影机市场整体出货量为148,737台,销售额为15.1亿元人民币(约合2.2亿美元),分别比去年同期上涨37.7%和21.0%。从芯片技术方面看,LCD投影机在第二季度的市场份额为55.1%。同时, 相似文献
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近日——IDC发布的《中国打印外设市场季度跟踪报告(2007年第四季度)》显示,2007年中国打印外设市场总体出货量达到990万台,销售额为25.8亿美元,分别比2006年上涨了9.6%和17.6%。IDC 相似文献
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In recent years there has been increased emphasis, in both academic and political arenas, on the economic importance of the creative industries (CIs). As a result, policymakers are increasingly looking to the CIs as a source of potential growth. The literature on CIs suggests that these industries are predominantly content based rather than market based, with artistic priorities taking precedence over business concerns. This research examines growth strategies in the CIs using qualitative and quantitative methods. An in‐depth case study of 23 firms in CIs suggests that these firms tend to view growth as a secondary goal compared to the goal of creative output. The case study further yields the proposition that firms in the CIs can benefit from adopting what we refer to as an accordion growth strategy, in which firms grow and shrink to accommodate artistic content as well as in response to external forces. Statistical analysis of survey data confirms that firms in the CIs are less likely to have ambitions to grow and more likely to adopt an accordion growth strategy than firms in technology industries. These findings suggest that the policy emphasis on growth in the CIs might be misguided and should allow for alternating periods of growth and shrinkage. 相似文献
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Lei Yi Hongjun Li Jianwei Guo Oliver Deussen Xiaopeng Zhang 《Computer Graphics Forum》2018,37(1):239-253
Modelling and simulation of tree growth that is faithful to the living environment and numerically consistent to botanic knowledge are important topics for realistic modelling in computer graphics. The realism factors concerned include the effects of complex environment on tree growth and the reliability of the simulation in botanical research, such as horticulture and agriculture. This paper proposes a new approach, namely, integrated growth modelling, to model virtual trees and simulate their growth by enforcing constraints of environmental resources and tree morphological properties. Morphological properties are integrated into a growth equation with different parameters specified in the simulation, including its sensitivity to light, allocation and usage of received resources and effects on its environment. The growth equation guarantees that the simulation procedure numerically matches the natural growth phenomenon of trees. With this technique, the growth procedures of diverse and realistic trees can also be modelled in different environments, such as resource competition among multiple trees. 相似文献
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根据抓取到的新浪微博实际用户数据,分析了粉丝数、关注数和微博数3个特征量的增长模式,发现这3个特征量整体上都随时间线性增长,取整后的增长率服从幂律分布.用户特征量增长模式主要呈持续增长和爆发式增长,其中爆发式增长用户按增长的不同阶段又可以划分为前期、中期、后期和阶跃式4种增长模式.使用基于向量余弦距离相似性的K-means聚类算法,对不同排序和不同初始规模实际用户特征量的时间序列进行聚类分析,统计得到不同增长模式的用户数量.发现用户特征量中增速高的用户增长主要以爆发式增长为主,而规模高的用户增长以持续式增长为主.通过对用户粉丝数爆发式增长的过程分析,对比用户微博被转发和被评论二者的增长关系,提出了导致用户粉丝数爆发式增长的原因. 相似文献
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G. Sciumè W. G. Gray M. Ferrari P. Decuzzi B. A. Schrefler 《Archives of Computational Methods in Engineering》2013,20(4):327-352
The paper addresses modeling of avascular and vascular tumor growth within the framework of continuum mechanics and the adopted numerical solution strategies. The models involve tumor cells, both viable and necrotic, healthy cells, extracellular matrix (ECM), interstitial fluid, neovasculature and co-opted blood vessels, nutrients, waste products, and their interaction and evolution. Attention is focused on the more recent models which are much richer than earlier ones, i.e. they address more aspects of this complicated problem. An important element is how the governing equations are obtained and how the many interfaces between the above listed components are dealt with. These considerations suggest the definition of different classes of models comprised of diffusion, single phase flow and multiphase flow models with or without a solid phase. A multiphase flow model in a deforming porous medium (ECM) is chosen as reference model since it appears to invoke the least number of simplifying assumptions and has the largest potential for further development. The strategies adopted in the choice of the many model dependent constitutive relationships are discussed in detail. Two applications referring to two different model classes conclude the paper. 相似文献
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白昌中 《中国自动识别技术》2007,(1):28-37
2006年12月15日,中国自动识别技术协会在第二届三次理事会上,正式公布了《条码阅读设备通用技术规范》(AIMC 0001-2006)、《无源射频标签通用技术规范》(AIMC 0002-2006)、《射频读写器通用技术规范—频率低于135kHz》(AIMC 0003-2006)、《射频读写器通用技术规范—频率为13.56MHz》(AIMC 0004-2006)、《射频读写器通用技术规范—频率为2.45GHz》(AIMC 0005-2006)、《射频读写器通用技术规范—频率为UHF(860-960MHz)》(AIMC 0006-2006)、《射频读写器通用技术规范—频率为433MHz》(AIMC 0007-2006)、《汽车零部件用GS1系统编码与条码标识》(AIMC 0008-2006)、《自动识别企业分类与评估指标》(AIMC 0009-2006)九项协会标准,并于2007年1月1日开始实施。中国自动识别技术领域的标准化工作一直是业界关注的大事。2006年,在中国自动识别技术协会秘书处的统一组织和领导下,经过业界专家的共同努力,各工作组全力推进标准化项目,搭建了协会为平台、企业参与的模式,最终促使九项业界共识的相关技术、应用、管理标准的制定工作在2006年底前顺利完成,2007年进入推广应用和实施环节,改变了中国自动识别产业无标准可依的现状。一个多月来,本刊连续采访了协会负责标准化工作的领导和参与这九项标准制定工作的各界专家及企业代表,目的只有一个,就是希望阐释新标准的内涵和意义,展示中国自动识别技术产业在大力弘扬自主创新、保护自主知识产权和产业规范化发展的进程,促进协会标准顺利实施,推动中国自动识别技术产业和市场健康发展。 相似文献
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矢量场可视化是科学计算可视化研究的重要方向.对于复杂环境条件下大数据量矢量场的可视化,传统的方法运算量大,实时性难以满足要求.以空间晶体生长实验中的流场数据可视化为应用背景,针对目前常用方法的不足,引入了一种全新的基于图像的流场可视化方法--IBFV方法,并对该方法的机理进行了深入地分析和研究,给出了一种基于OpenGL图形库的简单实现算法,最终应用于布里奇曼晶体生长实验中流场数据的实时动态显示.实践证明此方法独立于流场数据,具有良好的适用性和直观性,并具有极高的速度,在当前普通PC机上可以实现50fps的动态显示帧频,得到连续无抖动的流场动态图像仿真. 相似文献