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Exploring the Constituents of Growth in a Technology Cluster: Evidence from Cambridge, UK 探索技术集群增长的要素:来自英国剑桥的证据
Pub Date : 2010-09-01 DOI: 10.2139/ssrn.1923065
Vivian Mohr, E. Garnsey
High-growth firms appear to be key drivers of new industries and technologies. Here we investigate the contribution of these and other types of firm to a technology cluster, in the context of ‘creative destruction’ shaping the evolution of the cluster. Evidence on the reallocation of scarce resources through processes of creative destruction is scarce. But in a cluster the effects of creative destruction can be traced through such developments as firm exits and entries change in firm size distribution and acquisition of firms. We apply churn analysis, firm size transition analysis and analysis of acquisition to the technology cluster in Cambridge UK over twenty years. Firm growth contributed two-thirds of all new job creation, while entry-exit turbulence accounted for one third of job creation. High-growth firms accounted for a quarter of jobs created in the Cambridge cluster during this period, without ever making up more than 3% of all tech firms. There has been an increase in average firm size and profitability. A fall in entry rates and fewer firms moving up into larger size categories in recent years point to adverse conditions for innovative new firms even before the financial crash.
高增长企业似乎是新产业和新技术的关键驱动力。在“创造性破坏”形成集群演变的背景下,我们研究了这些和其他类型的企业对技术集群的贡献。通过创造性破坏过程重新分配稀缺资源的证据很少。但在集群中,创造性破坏的影响可以通过企业退出和进入、企业规模变化、企业分布和企业收购等发展来追踪。我们运用流失率分析、企业规模转变分析和收购分析对英国剑桥大学的技术集群进行了20多年的研究。企业增长贡献了新增就业的三分之二,而进出动荡占新增就业的三分之一。在此期间,高增长公司创造的就业机会占剑桥集群的四分之一,但在所有科技公司中所占的比例从未超过3%。企业的平均规模和盈利能力都有所增加。近年来,进入率的下降和越来越少的公司进入规模更大的类别,表明即使在金融危机之前,创新的新公司也面临不利的条件。
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引用次数: 6
Sources, Development and Uses of Innovation in Modern Biotechnology 现代生物技术创新的来源、发展和应用
Pub Date : 2009-02-16 DOI: 10.1504/IJTE.2008.022863
Maija Renko, Malin E. Brännback, A. Carsrud
This research examines the innovation process that includes sources, development, and uses of innovation in the field of modern biotechnology. Based on existing literature and primary qualitative data collected from 39 young, small American biotechnology firms we show how biotechnology innovations constantly cross boundaries of traditionally separate industries. All three stages of innovation (sourcing, development, and use) involve a variety of actors that represent different fields of science, business, or markets. Previous literature has predominantly focused on the innovation development networks, but our study shows that also the sources of ideas as well as adoption of an innovation are characterized by networks of actors. Consequently, we suggest that biotechnology managers' understanding of innovation processes would benefit from paying attention to the networked nature of sources and uses of innovations, in addition to the collaborative product development process itself.
本研究考察了创新过程,包括现代生物技术领域创新的来源、发展和使用。基于现有文献和从39家年轻的小型美国生物技术公司收集的主要定性数据,我们展示了生物技术创新如何不断跨越传统上分离的行业边界。创新的所有三个阶段(采购、开发和使用)都涉及到代表科学、商业或市场不同领域的各种各样的参与者。以往的文献主要关注创新发展网络,但我们的研究表明,创新的思想来源和采用也具有行动者网络的特征。因此,我们建议生物技术管理者对创新过程的理解将受益于关注创新来源和使用的网络性质,以及协作产品开发过程本身。
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引用次数: 1
Technical Innovation 技术创新
Pub Date : 2009-01-03 DOI: 10.4135/9781446216491.n11
R. Mellor
This chapter introduces some of the concepts surrounding technical entrepreneurship and is suitable for students of the computer/IT-related disciplines and engineering, especially electrical engineering.
本章介绍了一些围绕技术创业的概念,适合计算机/ it相关学科和工程专业的学生,特别是电气工程专业的学生。
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引用次数: 0
Do Location Characteristics Have Different Survival Values for High and Low-Technology De Novo Enterprises? 高新技术和低技术初创企业的区位特征有不同的生存价值吗?
Pub Date : 2006-06-01 DOI: 10.2139/ssrn.940478
Aviad Pe'er, I. Vertinsky
The importance of sectors characterized by high knowledge and technological intensity is growing in the new economy. The creation and maintenance of competitive advantage in high-technology sectors depend to a large degree on innovation. Since diffusion of innovation tends to be local, location characteristics matter. We argue that new high-technology firms can improve their survival probabilities by entering locations that stimulate and support innovation. These characteristics include urban diversity, competitive industrial structure, and clustering. In contrast, clustering, competition and diversity have lower survival value for low-technology firms, as the benefits accruing from higher innovation levels are less valuable. Indeed, the costs of urban congestion, and the pressure of competition on prices may result in negative impacts on survival. We test our hypotheses using an extensive longitudinal data base which covers all de novo entrants into the Canadian manufacturing sectors. The results indicate that clustering has a higher survival value for high-technology firms. Urban diversity and competition have positive effect on the survival of high-technology firms and negative effect on low-technology firms.
在新经济中,以高知识和技术强度为特征的部门的重要性日益增加。高技术部门竞争优势的创造和保持在很大程度上取决于创新。由于创新的扩散往往是局部的,所以区位特征很重要。我们认为,新的高科技企业可以通过进入刺激和支持创新的地区来提高其生存概率。这些特征包括城市多样性、竞争性产业结构和集群性。相比之下,集群、竞争和多样性对低技术企业的生存价值较低,因为高创新水平带来的收益价值较低。事实上,城市拥堵的成本和价格竞争的压力可能会对生存产生负面影响。我们使用广泛的纵向数据库来测试我们的假设,该数据库涵盖了加拿大制造业的所有新进入者。结果表明,集群对高科技企业具有更高的生存价值。城市多样性和竞争对高技术企业的生存有积极影响,对低技术企业的生存有消极影响。
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引用次数: 0
Enhancement of Power Quality by the Combination of D-Statcom and UPQC in Grid Connected to Hybrid System 并网混合系统中D-Statcom与UPQC结合提高电能质量
Pub Date : 1900-01-01 DOI: 10.34218/ijeet.10.5.2019.005
Sumithra M, Sujatha B.C
Demand for electricity increasing, to meet energy requirement non-conventional energy sources are utilized. In this paper combination of WES and PVS generates power and voltage at PCC with grid instantaneously. Due to integration of hybrid system into the grid poses power quality issues. Basically hybrid system is the combination of two power generating system that will provide power continuously. PVS converts solar radiation into electric energy and WES converts wind energy into electric energy. The goal of this study is concerned on power quality problems i.e voltage/current fluctuation, flickers, distortion, damping, harmonics and other parameters are voltage/current sag/swell are analyzed. To mitigate the power quality issues combination of FACTS Devices such as D-STATCOM and UPQC are used and simulated in SIMULINK/MATLAB Software.
电力需求不断增加,为满足能源需求,利用非常规能源。本文将WES和pv结合在一起,在PCC与电网瞬间产生功率和电压。由于将混合动力系统并入电网会产生电能质量问题。混合动力系统基本上是两个发电系统的组合,将持续提供电力。pv将太阳辐射转化为电能,WES将风能转化为电能。本研究的目的是关注电能质量问题,即电压/电流波动、闪烁、失真、阻尼、谐波等参数对电压/电流的凹陷/膨胀进行分析。为了缓解电能质量问题,使用了D-STATCOM和UPQC等FACTS器件的组合,并在SIMULINK/MATLAB软件中进行了仿真。
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引用次数: 2
MCN-2 Invariants, Homomorphisms, and Anomalies in Polynomials and the 'Fundamental Theorem of Algebra' 多项式中的MCN-2不变量、同态和异常与“代数基本定理”
Pub Date : 1900-01-01 DOI: 10.2139/ssrn.2375024
Michael C. I. Nwogugu
This article contributes to the existing literature by: i) proving that the Descartes Sign Rule (as interpreted by most academicians - such as Oehmke (2000) and Osborne (2010)) is wrong; ii) proving that the Fundamental Theorem Of Algebra (FTA) is wrong; iii) explaining how “Root-Calculation” in Algebra is wrong and introducing an alternative method for verifying real and complex roots of a polynomial; iv) solving a six-degree Polynomial equation and a nine-degree Polynomial equation, by introducing new classes of Invariants (“MCN-2 Invariants”) and Homomorphisms. Burrus (2004); Sitton, Burrus, Fox & Treitel (2003); and Lei, Blane & Cooper (1996), had concluded that such higher-order polynomials were impossible to solve. These issues are applicable in nonlinear analysis, evolutionary computation and pattern-analysis – given the discussions in Yannacopoulos, Brindley, Merkin & Pilling (1996); Campos-Canton, Aguirre-Hernandez, Renteria & Gonzalez (2015); Zheng, Takamatsu & Ikeuchi (2010); and Boyer & Goh (2007).
本文对现有文献的贡献是:i)证明了笛卡尔符号规则(由大多数学者解释,如Oehmke(2000)和Osborne(2010))是错误的;ii)证明代数基本定理(FTA)是错误的;iii)解释代数中的“根计算”是错误的,并介绍验证多项式的实根和复根的替代方法;iv)通过引入新的不变量(“MCN-2不变量”)和同态,求解一个六次多项式方程和一个九次多项式方程。Burrus (2004);Sitton, Burrus, Fox & Treitel (2003);Lei, Blane和Cooper(1996)得出结论,这种高阶多项式是不可能求解的。这些问题适用于非线性分析、进化计算和模式分析——考虑到Yannacopoulos、Brindley、Merkin & Pilling(1996)的讨论;Campos-Canton, Aguirre-Hernandez, Renteria & Gonzalez (2015);郑、高松、池内(2010);Boyer & Goh(2007)。
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引用次数: 0
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