5,920 research outputs found
Entrepreneurial Experience and Science Parks and Business Performance in Beijing, China
China is the second largest economic entity in the world. It is well acknowledged that small businesses have made significant contributions to Chinese economic development in terms of employment generation, income generation and poverty reduction. Entrepreneurs are the key people who are driving small businesses forward, and the Chinese Government has invested substantially in science parks. However, our understanding of entrepreneurship activities, science parks and especially prior business experience and business performance in China remains under researched. Therefore, to fill this gap, this research explores entrepreneursâ business performance of those who were on science parks against those whose businesses were off-park in Beijing China.
Human capital theory experience and the RBV provide the theoretical framework which were used to test the entrepreneurâs prior business ownership experience against the performance of the businesses in terms of innovation, exporting activity, employment growth, profitability and the usage of e-commerce. This research adopted a quantitative methodology to analyse a new data set gathered by the researcher. In the year of 2009, 462 valid questionnaires were received from the firms located on and off ZhongGuanCun Science Park (ZSP), and that represented a 12% response rate.
The results show that prior business ownership experiences and science park location have strong associations with business performances. In particular, firstly habitual entrepreneurs are more likely than novice entrepreneurs to be innovators, and in general to have a better business performance; secondly, business located on science parks generally performed better than off-park businesses and lastly, interestingly, there is no clear evidence showing that habitual entrepreneurs have better usage of e-commerce than novice entrepreneurs. According to these key research findings, implications are elucidated for Chinese practitioners and policy makers
Experimental Requirements to Determine the Neutrino Mass Hierarchy Using Reactor Neutrinos
This paper presents experimental requirements to determine the neutrino mass
hierarchy using reactor neutrinos. The detector shall be located at a baseline
around 58 km from the reactor(s) to measure the energy spectrum of electron
antineutrinos () precisely. By applying Fourier cosine and sine
transform to the L/E spectrum, features of the neutrino mass hierarchy can be
extracted from the and oscillations.
To determine the neutrino mass hierarchy above 90% probability, requirements to
the baseline, the energy resolution, the energy scale uncertainty, the detector
mass and the event statistics are studied at different values of
Comment: Update Fig.
Abstraction of Elementary Hybrid Systems by Variable Transformation
Elementary hybrid systems (EHSs) are those hybrid systems (HSs) containing
elementary functions such as exp, ln, sin, cos, etc. EHSs are very common in
practice, especially in safety-critical domains. Due to the non-polynomial
expressions which lead to undecidable arithmetic, verification of EHSs is very
hard. Existing approaches based on partition of state space or
over-approximation of reachable sets suffer from state explosion or inflation
of numerical errors. In this paper, we propose a symbolic abstraction approach
that reduces EHSs to polynomial hybrid systems (PHSs), by replacing all
non-polynomial terms with newly introduced variables. Thus the verification of
EHSs is reduced to the one of PHSs, enabling us to apply all the
well-established verification techniques and tools for PHSs to EHSs. In this
way, it is possible to avoid the limitations of many existing methods. We
illustrate the abstraction approach and its application in safety verification
of EHSs by several real world examples
Mass hierarchy sensitivity of medium baseline reactor neutrino experiments with multiple detectors
We report the neutrino mass hierarchy (MH) sensitivity of medium baseline
reactor neutrino experiments with multiple detectors. Sensitivity of
determining the MH can be significantly improved by adding a near detector and
combining both the near and far detectors. The size of the sensitivity
improvement is related to accuracy of the individual mass-splitting
measurements and requires strict control on the relative energy scale
uncertainty of the near and far detectors. We study the impact of both baseline
and target mass of the near detector on the combined sensitivity. A
figure-of-merit is defined to optimize the baseline and target mass of the near
detector and the optimal selections are 13~km and 4~kton
respectively for a far detector with the 20~kton target mass and 52.5~km
baseline. As typical examples of future medium baseline reactor neutrino
experiments, the optimal location and target mass of the near detector are
selected for JUNO and RENO-50. Finally, we discuss distinct effects of the
neutrino spectrum uncertainty for setups of a single detector and double
detectors, which indicate that the spectrum uncertainty can be well constrained
in the presence of the near detector.Comment: 7 pages, 9 figure
- âŠ