共查询到20条相似文献,搜索用时 15 毫秒
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人们都说":外来的和尚好念经",然而,当软件这一可塑性极强的产品在中国市场上遇到SaaS这一"外来和尚"的时候,似乎这本经并不好念。据了解,尽管被国外引为经典的SaaS模式在国内已经发展了近3年,可是在国外赢利效果相当不错的Salesforce.com 相似文献
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al other la 《计算机应用与软件》2004,(12)
d jointly by the national laws,folk customs and morality,though the ways of regulation can vary in different countries or historical periods.laws about sex, sex laws, Foucault0贵州大学学报(社会科学版)Journal of Guizhou Uni 相似文献
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This paper analyzes the Bertrand–Edgeworth duopoly model using a solution concept of Equilibrium in Secure Strategies (EinSS), which describes cautious behavior in noncooperative games. The concept is suitable for studying games where the threats of other players represent an important factor in the decision-making process. We demonstrate that, in some cases where the Bertrand–Edgeworth price duopoly admits no Nash–Cournot equilibria, there exists a unique EinSS with both players choosing an identical equilibrium price lower than the monopoly price. The difference between these prices can be interpreted as an additional reduction in price that allows the players to secure themselves against the mutual threats of undercutting. We formulate and prove a criterion for the EinSS existence. 相似文献
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D. Rocchini 《International journal of remote sensing》2013,34(11):2635-2644
The use of spectral distance for explaining the phenomenon of distance decay in species similarity between two sites (based on the niche difference model) is presented here. Distance decay is based on the first law of geography: ‘the similarity between two sites decays with increasing the distance between them’. From an ecological point of view, this could be expressed as: ‘the β‐diversity between two sites should increase with an increase in spatial distance’. Beta‐diversity is defined as the amount of turnover in species composition from one site to another; and it plays a key role in biodiversity management and conservation, as it allows the detection of spatial gradients that act functionally in determining the spatial variation in species composition. This work demonstrates how the celebrated distance decay pattern achieved by means of spatial distance can be attained even with spectral distance, measured on Landsat near‐infrared images. It is argued that spectral heterogeneity represents a good proxy of β‐diversity of an area, becoming a valuable tool in biodiversity characterization at regional and global scales. 相似文献
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Organizations are limited in their choices by the institutional environment in which they operate. This is particularly true for IT sourcing decisions that go beyond cost considerations and are constrained by traditions, geographical location, and social networks. This article investigates how a company can disentangle itself from the constraints of the institutional environment. We do so drawing on a longitudinal case study of an Italian SME active in the steel industry that successfully changed its institutionally sound, but increasingly inefficient, IT sourcing practice. Our main result suggests that by attending steadily to institutional logics, organizations can become selective in how the institutional environment influences them and act more purposefully in their decisions. In particular, through the creation of companywide IT management competencies and targeted hiring practices, organizations can strike a balance between the different institutional logics guiding IT sourcing decisions and eventually shift from the dominant logic of localism to a logic of market efficiency. This change does not depend from a choice but rather builds on a process through which IT management competences are slowly integrated in the organization. 相似文献
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Ratcliff R Hasegawa YT Hasegawa RP Childers R Smith PL Segraves MA 《Neural computation》2011,23(7):1790-1820
Simultaneous recordings were collected from between two and four buildup neurons from the left and right superior colliculi in rhesus monkeys in a simple two-choice brightness discrimination task. The monkeys were required to move their eyes to one of two response targets to indicate their decision. Neurons were identified whose receptive fields were centered on the response targets. The functional role of inhibition was examined by conditionalizing firing rate on a high versus low rate in target neurons 90 ms to 30 ms before the saccade and examining the firing rate in both contralateral and ipsilateral neurons. Two models with racing diffusion processes were fit to the behavioral data, and the same analysis was performed on simulated paths in the diffusion processes that have been found to represent firing rate. The results produce converging evidence for the lack of a functional role for inhibition between neural populations corresponding to the two decisions. 相似文献
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Fu Yuxi 《计算机科学技术学报》1998,13(6):579-587
Encodings in polymorphism with finite product types are considered.These encodings are given in terms of I-algebras.They have th property that the ground terms are precisely the closed normal terms of the encoded types.The proof of a well-known result is transplanted to the setting and it is shown why weak recursion is admissible.The paper also shows how to carry out the dual encodings using the existential quantifier. 相似文献
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《每周电脑报》1999,(32)
cs and Geotechnical Earthquake EngineeringLiu Hanlong Yu Xiangjuan(Research Institute of Geotechnical Engineering, Hohai University, Nanjing 210098)The recent advance in dynamic constitutive model and dynamic analysis for soil mass is reviewed in the paper, and the researches on the elastic plastic model and dynamic elastic 相似文献
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the FuryGENG Chong-huan(Foreign Languages College, Hebei Teachers University, Shijiazhuang Hebei 050091,China)The southern American modern writer, the winner of the Nobe 相似文献
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This paper presents an overview of some of the key issues which have emerged in recent years surrounding the growth and application
of e-commerce in the global information infrastructure (GII). Increased access to the Internet, the Internet as a strategic
resource for business, trust and security issues surrounding e-commerce, and calls for a regulatory and legal framework to
protect buyers and sellers, are four critical areas that need to be addressed by industry, government and the individual.
In attempting to synthesise some of the contemporary key issues in e-commerce, we conclude by suggesting that research into
this subject must embrace both external and internal factors as this will engender a deeper understanding of the role of e-commerce
in the so-called ‘knowledge-driven economy’. 相似文献
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Maria Koutantji Peter McCulloch Shabnam Undre Sanjay Gautama Simon Cunniffe Nick Sevdalis Rachel Davis Piers Thomas Charles Vincent Ara Darzi 《Cognition, Technology & Work》2008,10(4):275-285
We developed a module for surgical team training using briefings in simulated crisis scenarios and here we report preliminary
findings. Nine surgical teams (34 trainees) participated in a pre-training simulation, followed by an interactive workshop
on briefing and checklists, and then a post-training simulation. Both technical and non-technical skills were assessed via
observation during simulations by expert trainers who provided feedback on performances at the end of simulation. Trainees
also reported their attitudes to briefings and evaluated the training. Pre-training attitudes to briefing were positive, some
of which improved post-training and trainees’ evaluation of the training was positive. Surgeons’ technical skill improved
significantly post-training, but their decision-making skill was rated lower than other non-technical skills, compared to
other trainees. The training did not appear to greatly improve non-technical skill performance. Training surgical teams in
simulation is feasible but much more work is needed on measurement development and training strategy to confirm its efficacy
and utility. 相似文献
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Dipl.-Inf. Jens Vykoukal Dipl.-Wirtsch.-Inf. Martin Wolf Prof. Dr. Roman Beck 《WIRTSCHAFTSINFORMATIK》2009,51(2):206-214
Over the last few years Grid computing has attracted considerable attention from the industry, because it offers opportunities for new on-demand business services for enterprises. In this article, we depict the current trend of enterprises to source Grid services offered by third-party utility providers on a use-on-demand, pay-per-use basis, thus leading to faster IT response to changing business needs. We outline the emerging expansion of Grid computing in industry and discuss the significant challenges still needing to be solved to further promote the adoption of Grid technology in the business domain. 相似文献
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For highly interdependent yet location-specific tasks, distributed teams need to closely coordinate activities and processes.
This field study in the upstream oil and gas industry focused on challenges in the coordination of highly interdependent tasks
if teams work remotely on an ongoing basis. Based on 78 semi-structured interviews and observations over a period of 12 months,
we identified coordination requirements for primary team activities, as well as effects of changing media capabilities to
overcome difficulties of ongoing distribution. Implications for media requirements in the support of ongoing distributed teams
are discussed. 相似文献
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Joseph Leu 《软件工程师》2006,(1):119-121
Social network is a dominant, distinguishing characteristic of Silicon Valley. Because innovation entails coping with a high degree of uncertainty,such innovation is particularly dependent on networks. 相似文献