10,393 research outputs found
The Research on New Town Development Strategy in Metropolitan Outskirts: A Case Study of Liangzhu New Town
New Towns in the outskirts of city has existed for a moment within the period of China urbanization, and lots of experiences are accumulated during the practices while building this system.
This essay is mainly established by the first multifunctional outskirt town, as well as the research object --- Liangzhu New Town, and it also make dicussions and summaries about the concept of design, the structure of this project, the operation process, the mode of operation and etc.
Overall, by combining the objective requirements of the outskirts new town development, which is affected by the metropolitan suburbanization, this paper explores a smart way in the construction of the new style urbanization, as well as the solution to the problems which may happen during the construction of the outskirts new town
An empirical study of the impacts of geographic and cultural distance on Chinese ODI
Since the reform and opening-up started in the end of the 1970s, especially after Deng’s southern tour in the early 1990s, China has achieved remarkable success in attracting foreign direct investment (FDI), and become one of the top destinations in the world for FDI since 2003. By 2013, the utilized FDI in China has reached USD118.7 billion from nearly null level. The recent UNCTAD report shows that China became the top destination for inward FDI again in 2014, with an estimated amount of over US$128 billion of FDI received, despite concerns of China\u27s economic slowdown. With China’s rapidly integrating with the global economy, its outward FDI has also picked up rapidly in recent decades, especially since China’s WTO entry in 2001, to make overseas acquisitions to gain technology and market access and international experience. Over the past few decades China has transformed into a major source country of FDI in the world, and become the third largest source of foreign direct investment after the United States and Japan since 2012.
In this study we attempt to investigate empirically the impacts of geographic and cultural distance on Chinese outward direct investment (ODI). It is found that Chinese ODI is negatively correlated with both geographic and cultural distance based on the tests using the full sample of all the recipient countries. Furthermore, we investigate the mechanisms through which the impact of cultural and geographic distance is exerted. The results indicate that geographic distance bears significantly negative impacts on ODI in the countries of low geographic distance, while it encourages OFDI into countries with high geographic distance. In addition, cultural distance is found to discourage OFDI through its impact on bilateral trade
Orientation-dependent energy-storage performance and electrocaloric effect in PLZST antiferroelectric thick films
The enhancement of the energy-storage performance and electrocaloric effect (ECE) was achieved via orientation control. The 1.5-μm-(Pb0.97La0.02)(Zr0.73Sn0.22Ti0.05)O3 (PLZST) antiferroelectric (AFE) thick films with (111), (110), and (100) crystallographic orientations were successfully prepared via a sol-gel method. It was found that both the enhanced energy-storage density of 13.5 J/cm3 at 900 kV/cm and the corresponding temperature reduction of ΔT = 28.1 °C at room temperature were obtained in the PLZST thick film with (111) orientation due to a high polarization. Moreover, these films with different orientations display a small leakage current density at the room temperature. These results suggest that both energy-storage properties and cooling performance in AFEs could be optimized by the proper orientation control
QTL analysis of kernel soluble sugar content in supersweet corn
A genetic linkage map was constructed with SSR markers based on a super-sweet corn population consisting of 208 F2 individuals from the cross Ji557 (sh2) × Ji165 (sh2). Density of the linkage groups varied from 2.2 cM to 65.3 cM, with an average of 13.0 2 cM between two adjacent markers. The map covered 1470.9 cM of the total recombination length of the super-sweet corn. Using Mapmaker/QTL, 11 quantitative trait loci (QTLs) were identified for kernel soluble sugar content, explaining 3.5 - 20.3% of soluble sugar content variance and collectively accounting for 63.7% of the trait variance. Of the 11QTLs associated with kernel soluble sugar content, 2 (18.2%) showed additive effects, 3 (27.3%) showed partially dominant effects, 3 (27.3%) showed dominant effects and 3 (27.3%) showed over-dominant effects. All four types of genetic effects appeared to play important roles in determining the kernelsoluble sugar content in super-sweet corn cultivars
Quantum key distribution with "dual detectors"
To improve the performance of a quantum key distribution (QKD) system, high
speed, low dark count single photon detectors (or low noise homodyne detectors)
are required. However, in practice, a fast detector is usually noisy. Here, we
propose a "dual detectors" method to improve the performance of a practical QKD
system with realistic detectors: the legitimate receiver randomly uses either a
fast (but noisy) detector or a quiet (but slow) detector to measure the
incoming quantum signals. The measurement results from the quiet detector can
be used to bound eavesdropper's information, while the measurement results from
the fast detector are used to generate secure key. We apply this idea to
various QKD protocols. Simulation results demonstrate significant improvements
in both BB84 protocol with ideal single photon source and Gaussian-modulated
coherent states (GMCS) protocol; while for decoy-state BB84 protocol with weak
coherent source, the improvement is moderate. We also discuss various practical
issues in implementing the "dual detectors" scheme.Comment: 22 pages, 9 figure
CUR Low Rank Approximation of a Matrix at Sublinear Cost
Low rank approximation of a matrix (hereafter LRA) is a highly important area
of Numerical Linear and Multilinear Algebra and Data Mining and Analysis. One
can operate with LRA at sublinear cost, that is, by using much fewer memory
cells and flops than an input matrix has entries, but no sublinear cost
algorithm can compute accurate LRA of the worst case input matrices or even of
the matrices of small families in our Appendix. Nevertheless we prove that
Cross-Approximation celebrated algorithms and even more primitive sublinear
cost algorithms output quite accurate LRA for a large subclass of the class of
all matrices that admit LRA and in a sense for most of such matrices. Moreover,
we accentuate the power of sublinear cost LRA by means of multiplicative
pre-processing of an input matrix, and this also reveals a link between C-A
algorithms and Randomized and Sketching LRA algorithms. Our tests are in good
accordance with our formal study.Comment: 29 pages, 5 figures, 5 tables. arXiv admin note: text overlap with
arXiv:1906.0492
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