Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99


Any time

2020 ( 54 )

2019 ( 346 )

2018 ( 2363 )

2017 ( 2244 )

Custom range...

Search Results: 1 - 10 of 135189 matches for " Li Cao "
All listed articles are free for downloading (OA Articles)
Page 1 /135189
Display every page Item
The Research of Knowledge Workers’Competencies Based on EEG Experiment of Mental Operations  [PDF]
Huan Cao, Yongjian Li
iBusiness (IB) , 2010, DOI: 10.4236/ib.2010.21005
Abstract: The paper analyzes the limitation of the method to study the competencies. The differences between competencies of knowledge workers exist in the “therbligs” used in information process. Based on 191 questionnaires, advance the 9 common mental operations: metacognition, distinguishing, memory, transforming, imagining, character extracting, character integrating, reasoning and concretization. And the metacognition plays a role on planning, supervising and adjusting to the other mind operations. Then the paper designs a mental arithmetic experiment to compare the difference in the brain electric power spectrum and the brain electronic topographic diagram between the subjects of the different performance. And the paper further discusses the feasibility of the method to explore the competencies.
Does Inside Trading Affect Managers’ Decision-Making? A Theoretical Investigation  [PDF]
Ning Cao, Shanmin Li, Yong Li
Journal of Mathematical Finance (JMF) , 2015, DOI: 10.4236/jmf.2015.54030

This paper analyzes how inside trading affects managers’ decision-making and also examines the effect of the social relations on managers. Through model analysis, the paper shows that inside trading does affect managers’ behavior. Inside trading lowers the managers’ minimum requirements for risky projects and thus has a risk-reduction effect on managers. In some cases, the existence of inside trading makes managers select projects with negative returns, which results in agency problems. When managers try to consolidate their social networks by divulging inside information, agency problems are exacerbated. This paper also analyzes the degree of risk aversion. As the degree of a manager’s risk aversion increases, the risk-reduction effect of inside trading is reduced.

Differences in procrastination and motivation between undergraduate and graduate students
Li Cao
The Journal of Scholarship of Teaching and Learning , 2012,
Abstract: Procrastination became increasingly prevalent among students in recent years. However, little research was found that directly compares academic procrastination across different academic grade levels. The present study used a self-regulated learning perspective to compare procrastination types and associated motivation between undergraduate and graduate students. Sixty-six undergraduate and sixty-eight graduate students responded to a packet of questionnaires concerning their experience in an educational psychology class. The results show that students’ beliefs about the usefulness of procrastination were a better predictor of academic procrastination than self-efficacy beliefs and achievement goal orientations. Student age was related to procrastination types. Among the undergraduate procrastinators, the younger students were more likely to engage in active procrastination while the older students tended to engage in passive procrastination. Implications and future research directions are discussed.
PCR Detection of the Three Neofabraea Pathogenic Species Responsible for Apple Bull’s Eye Rot  [PDF]
Dongmei Cao, Xin Li, Jijuan Cao, Weifang Wang
Advances in Microbiology (AiM) , 2013, DOI: 10.4236/aim.2013.31009

Apple bull’s eye rot is caused by pathogenic Neofabraea species including N. malicorticis, N. perennans and N. alba. Fruits carrying this fungal quarantine disease are prohibited from entering China. The host plants for the pathogens include several Rosaceae fruits including apple and pear. Disease symptoms and pathogen morphology are often insufficient to determine the identity of the pathogen, particularly at the species level. In the current study, we analyzed the inter-species sequence variations in the β-tublin gene, and designed specific primers to allow PCR amplification of 554 bp fragments from pathogenic Neofabraea species. The PCR products were recovered and sequenced, and Blast search was conducted using the DNA sequences in the Genbank database. The results indicated precise PCR amplification of the target sequences from the host pathogen, which allowed unambiguous identification of the species.

Face recognition based on manifold learning and Rényi entropy  [PDF]
Wen-Ming Cao, Ning Li
Natural Science (NS) , 2010, DOI: 10.4236/ns.2010.21007
Abstract: Though manifold learning has been success-fully applied in wide areas, such as data visu-alization, dimension reduction and speech rec-ognition; few researches have been done with the combination of the information theory and the geometrical learning. In this paper, we carry out a bold exploration in this field, raise a new approach on face recognition, the intrinsic α-Rényi entropy of the face image attained from manifold learning is used as the characteristic measure during recognition. The new algorithm is tested on ORL face database, and the ex-periments obtain the satisfying results.
Dynamics of a Discrete Predator-Prey System with Beddington-DeAngelis Function Response  [PDF]
Qibin Fang, Xiaoping Li, Meiyu Cao
Applied Mathematics (AM) , 2012, DOI: 10.4236/am.2012.34060
Abstract: This paper discusses the dynamic behaviors of a discrete predator-prey system with Beddington-DeAngelis function response. We first show that under some suitable assumption, the system is permanent. Furthermore, by constructing a suitable Lyapunov function, a sufficient condition which guarantee the global attractivity of positive solutions of the system is established
Positive Periodic Solution for a Two-Species Predator-Prey System  [PDF]
Meiyu Cao, Xiaoping Li, Xiangjun Dai
Applied Mathematics (AM) , 2014, DOI: 10.4236/am.2014.58103

A two-species predator-prey system with time delay in a two-patch environment is investigated. By using a continuation theorem based on coincidence degree theory, we obtain some sufficient conditions for the existence of periodic solution for the system.

A Kind of Doubly Periodic Riemann Boundary Value Problem on Two Parallel Curves  [PDF]
Lixia Cao, Xiaowei Li, Chengxin Lin
Advances in Pure Mathematics (APM) , 2014, DOI: 10.4236/apm.2014.412071

We proposed a kind of doubly periodic Riemann boundary value problem on two parallel curves. By using the method of complex functions, we investigated the method for solving this kind of doubly periodic Riemann boundary value problem of normal type and gave the general solutions and the solvable conditions for it.

Analysis on the Phase Frequency Characteristic of Soil Impedance  [PDF]
Xiaobin Cao, Zhongmei Li, Shiwei Yao
Energy and Power Engineering (EPE) , 2018, DOI: 10.4236/epe.2018.104B003
Soil is a typical porous media and its impedance characteristic directly determines the performance of grounding system. Soil phase frequency characteristic measurements were carried out on various soil types and water content. This paper finds that the impedance angle of soil specimen presents a capacitive performance when power frequency (f) is low. As the frequency increases, soil impedance angle goes up rapidly. Furthermore the frequency characteristic while f > 1000 Hz is distinct in terms of different water content. In particular, at low moisture content, soil impedance angle would be higher than 0?, that is, the inductive component is obvious. The study result indicates that porous media possesses the unique conductivity property dif-ferent from conductor and solution. Its mechanism needs further study.
Factors Affecting Successful Equity Crowdfunding  [PDF]
Ying Li, Hongduo Cao, Tengjuan Zhao
Journal of Mathematical Finance (JMF) , 2018, DOI: 10.4236/jmf.2018.82028
Abstract: This study examines the factors that influence successful equity crowdfunding, using data from the website www.dajiatou.com to develop models based on investors’ willingness to invest, financing efficiency, and the herding effect, which are all related to the successful financing of projects. The results show that financing objectives, assignment of shares, and the number of inquiries have a significant impact on investors’ willingness to invest; the minimum initial investment amount and the number of inquiries have a significant impact on financing efficiency, and early investment affects the decision-making behavior of investors later in the process via the herding effect.
Page 1 /135189
Display every page Item

Copyright © 2008-2017 Open Access Library. All rights reserved.