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Search Results: 1 - 10 of 23040 matches for " Tongying Liang "
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Research on the Relationship between Managerial Overconfidence and Corporate R & D Investment in the Context of Financing Constraints  [PDF]
Tongying Liang, Xiangtian Mo
Open Journal of Business and Management (OJBM) , 2017, DOI: 10.4236/ojbm.2017.51003
Abstract: Using the data of Chinese listed companies from 2012 to 2014, this paper empirically tests the relationship between managerial overconfidence and corporate R & D investment in the context of financing constraints by the method of multiple regression analysis, and further tests the impact of ownership type on the relationship. We find that: 1) Compared with the companies with weak financing constraints, the positive relationship between managerial overconfidence and corporate R & D investment in the companies with strong financing constraints is stronger; 2) In the context of strong financing constraints, compared with the state-owned companies, the positive relationship between managerial overconfidence and corporate R & D investment in the non-state-owned companies is stronger.
Vibration Data Processing Based on Petri Network in Wireless Sensor Networks
Tongying Li,Zhenchao Zhang
Journal of Networks , 2012, DOI: 10.4304/jnw.7.2.400-407
Abstract: There are many auxiliaries with high rotating speed in a power plant, such as pumps, fans, motors and so on. To warrant their safe and reliable operation, their state of vibration has to be monitored. But because of their scattered location, the traditional way of online monitoring with shielded cable connections is costly and work expensive and the precision, reliability and safety of itinerant measurements are unable to meet the requirements of customers. In this paper, a novel method of vibration monitoring for auxiliaries in power plants based on wireless sensor networks has therefore been proposed to realize vibration data acquisition, on-line-detection and data analyzing in this paper, which meets the requirements of auxiliaries with less expenditure and warrants safe operation in the long run. Due to the restrictions of energy and bandwidth on wireless sensor networks, how to utilize the limited resources to acquire available and reliable data from the sensor nodes becomes a hot topic. After modeling and analyzing on mass data by time-sequence technique, a reliable data collection method based on AR(P) model with Petri Net technique are designed in order to improve the whole performance of the system, prolong the lifetime of the network and decrease the energy consumption of the sensor nodes.
Automated measurement of cell motility and proliferation
Alfred Bahnson, Charalambos Athanassiou, Douglas Koebler, Lei Qian, Tongying Shun, Donna Shields, Hui Yu, Hong Wang, Julie Goff, Tao Cheng, Raymond Houck, Lex Cowsert
BMC Cell Biology , 2005, DOI: 10.1186/1471-2121-6-19
Abstract: We have applied this technology to study the effects of different extracellular matrix compounds on human osteoblast-like cell lines to explore functional changes that may underlie processes involved in bone formation and maintenance. We show dose-response and kinetic data for induction of increased motility by laminin and collagen type I without significant effects on growth rate. Differential motility response was evident within 4 hours of plating cells; long-term responses differed depending upon cell type and surface coating. Average velocities were increased approximately 0.1 um/min by ten-fold increases in laminin coating concentration in some cases. Comparison with manual tracking demonstrated the accuracy of the automated method and highlighted the comparative imprecision of human tracking for analysis of cell motility data. Quality statistics are reported that associate with stage noise, interference by non-cell objects, and uncertainty in the outlining and positioning of cells by automated image analysis. Exponential growth, as monitored by total cell area, did not linearly correlate with absolute cell number, but proved valuable for selection of reliable tracking data and for disclosing between-experiment variations in cell growth.These results demonstrate the applicability of a system that uses fully automated image acquisition and analysis to study cell motility and growth. Cellular motility response is determined in an unbiased and comparatively high throughput manner. Abundant ancillary data provide opportunities for uniform filtering according to criteria that select for biological relevance and for providing insight into features of system performance. Data quality measures have been developed that can serve as a basis for the design and quality control of experiments that are facilitated by automation and the 384 well plate format. This system is applicable to large-scale studies such as drug screening and research into effects of complex combinati
The Role of Space Dimension on the Blow up for a Reaction-Diffusion Equation  [PDF]
Zhilei Liang
Applied Mathematics (AM) , 2011, DOI: 10.4236/am.2011.25076
Abstract: This paper deals with the doubly degenerate reaction-di?usion equation where , , and B(0,1) denotes a unit ball in RN with the center in origin. We prove that the blow up phenomenon can be restrained if the space dimension N is taken su?ciently large. Moreover, the critical condition guaranteeing the absence (or occurrence) of the blow up is achieved.
Reconfigurable Logistics Information System Based on Soft Components Technology  [PDF]
Feng Liang
Journal of Service Science and Management (JSSM) , 2008, DOI: 10.4236/jssm.2008.12016
Abstract: Logistics information system should be reconfigurable, open and extensible to support the total supply chain. Soft com-ponent technology is introduced to design and build the logistics information system oriented to the business demand of kinds of supply chains. When the supply chain is changed, logistics information system organizes all kinds of required logistics resources, by recalling predefined soft components to dynamically configure logistics information system, which can ensure quick respond to the changes of supply chain demand and support dynamic reconfiguration of the logistics information system. In this paper, a method of reconfiguration of logistics information system by using soft component technology is proposed. The key problems to the subject domain are investigated and an illustrative case study is presented.
Empirical Study on the Performance of Initial Public Offerings in China  [PDF]
Peng Liang
Journal of Service Science and Management (JSSM) , 2008, DOI: 10.4236/jssm.2008.12014
Abstract: We study the long-run performance of 166 IPOs listed on China’s Shanghai Stock Exchanges from 2000 to 2002. We find that the average market-adjusted cumulative return and buy-and-hold return over the three years after listing are -32.02% and -20.88%, which are both significantly negative. What’s more, as an additional robustness check, we cal-culate wealth relatives. One year after listing, WR less than 1 and we obtain a three-year wealth relative of 0.6826, consistent with the CAR and BHAR estimates. We then use a cross-sectional analysis to explain the long-run underper-formance of Chinese IPOs. The results show that the aftermarket performance is positive after listing (6 months) but thereafter returns decline. Buying A-share IPOs immediately after listing and holding the investment for three years results in negative returns and wealth relatives less than one.
Spin and Quantization of Gravitational Space  [PDF]
Bin Liang
Journal of Modern Physics (JMP) , 2012, DOI: 10.4236/jmp.2012.311218
Abstract: According to the formula of translational motion of vector along an infinitesimal closed curve in gravitational space, this article shows that the space and time both are quantized; the called center singularity of Schwarzschild metric does not exist physically, and Einstein’s theory of gravity is compatible with the traditional quantum theory in essence; the quantized gravitational space is just the spin network which consists of infinite quantized loops linking and intersecting each other, and that whether the particle is in spin eigenstate depends on the translational track of its spin vector in gravitational space.
Comments on “Average Life Prediction Based on Incomplete Data”  [PDF]
Tachen Liang
Applied Mathematics (AM) , 2013, DOI: 10.4236/am.2013.412232
Abstract:

We comment on the correctness of the article “Average life prediction based on incomplete data” by [1] (Applied Mathematics, Vol. 2, pp. 93-105).

Electromagnetic Study of MW-Class HTS Wind Turbine Generators  [PDF]
Yongchun Liang
Energy and Power Engineering (EPE) , 2013, DOI: 10.4236/epe.2013.54B072
Abstract: High temperature superconductor (HTS) technology enables a significant reduction in the size and weight of MW-class generators for direct-drive wind turbine systems and reduce the cost of clean energy relative to conventional copper an permanent-magnet-based generators and gearbox. Using MAXWELL, we studied MW class superconducting synchronous machines. By comparison the weight, we concluded that HTS wind turbine with rotor iron is the heaviest and HTS wind turbine without rotor iron and stator teeth is the lightest. By comparison the flux density, HTS wind turbine without rotor iron is the least and HTS wind turbine without rotor iron and stator teeth is the largest. By comparison the cost, HTS wind turbine with rotor iron is the highest and the other two is almost the same. HTS wind turbine without rotor iron and stator teeth is the best type.
Upper Bound Estimation of Fractal Dimensions of Fractional Integral of Continuous Functions  [PDF]
Yongshun Liang
Advances in Pure Mathematics (APM) , 2015, DOI: 10.4236/apm.2015.51003
Abstract: Fractional integral of continuous functions has been discussed in the present paper. If the order of Riemann-Liouville fractional integral is v, fractal dimension of Riemann-Liouville fractional integral of any continuous functions on a closed interval is no more than 2 - v.
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