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Search Results: 1 - 10 of 9283 matches for " Pan "
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A Contextual Item-Based Collaborative Filtering Technology  [PDF]
Xueqing Tan, Pan Pan
Intelligent Information Management (IIM) , 2012, DOI: 10.4236/iim.2012.43013
Abstract: This paper proposes a contextual item-based collaborative filtering technology, which is based on the traditional item-based collaborative filtering technology. In the process of the recommendation, user’s important mobile contextual information are taken into account, and the technology combines with those ratings on the items in the users’ historical contextual information who are familiar with user’s current context information in order to predict that which items will be preferred by user in his or her current context. At the end, an experiment is used to prove that the technology proposed in this paper can predict user’s preference in his or her mobile environment more accurately.
The Impact of Macro Factors on the Profitability of China’s Commercial Banks in the Decade after WTO Accession  [PDF]
Qinhua Pan, Meiling Pan
Open Journal of Social Sciences (JSS) , 2014, DOI: 10.4236/jss.2014.29011

Profitability of China’s commercial banks has increased significantly since it joined the World Trade Organization (WTO). Constantly advancing of deepening the reform and increasingly fierce of international competition make us to be concerned more about macroeconomic factors. This paper makes an empirical analysis with a panel of 10 Chinese listed banks during the period 1998- 2012 to make a study of the potential impact of external factors may bring to China’s capital market. The results confirm that macroeconomic do have a substantial influence to the earning power of commercial banks, according to which some suggestions are made at the end of the paper.

Linearization of the Liouville Equation, Multiple Splits of the Chandler Frequency, Markowitz Wobbles, and Error Analysis  [PDF]
Cheh Pan
International Journal of Geosciences (IJG) , 2012, DOI: 10.4236/ijg.2012.325095
Abstract: The rotation of the physical Earth is far more complex than the rotation of a biaxial or slightly triaxial rigid body can represent. The linearization of the Liouville equation via the Munk and MacDonal perturbation scheme has oversimplified polar excitation physics. A more conventional linearization of the Liouville equation as the generalized equation of motion for free rotation of the physical Earth reveals: 1) The reference frame is most essential, which needs to be unique and physically located in the Earth; 2) Physical angular momentum perturbation arises from motion and mass redistribution to appear as relative angular momentum in a rotating Earth, which excites polar motion and length of day variations; 3) At polar excitation, the direction of the rotation axis in space does not change besides nutation and precession around the invariant angular momentum axis, while the principal axes shift responding only to mass redistribution; 4) Two inertia changes appear simultaneously at polar excitation; one is due to mass redistribution, and the other arises from the axial near-symmetry of the perturbed Earth; 5) The Earth at polar excitation becomes slightly triaxial and axially near-symmetrical even it was originally biaxial; 6) At polar excitation, the rotation of a non-rigid Earth becomes unstable; 7) The instantaneous figure axis or mean excitation axis around which the rotation axis physically wobbles is not a principal axis; 8) In addition to amplitude excitation, the Chandler wobble possesses also multiple frequency-splits and is slow damping; 9) Secular polar drift is after the products of inertia and always associated with the Chandler wobble; both belong to polar motion; 10) The Earth will reach its stable rotation only after its rotation axis, major principal axis, and instantaneous figure axis or mean excitation axis are all completely aligned with each other to arrive at the minimum energy configuration of the system; 11) The observation of the multiple splits of the Chandler frequency is further examined by means of exact-bandwidth filtering and spectral analysis, which confirms the theoretical prediction of the linearized Liouville equation. After the removal of the Gibbs phenomenon from the polar motion spectra, Markowitz wobbles are also observed; 12) Error analysis of the ILS data demonstrates that the incoherent noises from the Wars in 1920-1945 are separable from polar motion and removable, so the ILS data are still reliable and useful for the study of the continuation of polar motion.
Study on Turbulence Effects for Beam Propagation in Turbulent Atmosphere  [PDF]
Pingping Pan
Optics and Photonics Journal (OPJ) , 2013, DOI: 10.4236/opj.2013.32B035

Based on the theory for the turbulence and the Rytov method, the propagation formulas of the scintillation index and the mean square angle-of-arrival fluctuation for the beam propagation in atmospheric turbulence have been derived respectively. The propagation properties of the two turbulence effects have been investigated, and the effects of the characteristic parameters of turbulence and the beam parameters have been discussed. The results show that the variation of the two turbulence effects depends on the structure constant of the refractive index fluctuations Cn2, the inner scale of the turbulence l0, the waist width of source beam w0 and the wave length λ. Moreover, there are two parameters including Cn2 and l0 which show more significant effects in atmosphere. Consequently, a new method for determining the characteristics parameters of the turbulence by using the measurement of the scintillation index and the angle-of-arrival fluctuation has been proposed.

Non-Rigid Rotation, Global Geodynamics and Free Nutation  [PDF]
Cheh Pan
International Journal of Geosciences (IJG) , 2014, DOI: 10.4236/ijg.2014.51008

The rotation of the physical Earth not only obeys the law of conservation of angular momentum but follows also the three-finger rule of the right-handed system. The reference frame in the Earth is most essential. The generalized Eulerian equation of motion or the Liouville equation is to represent global geodynamics in general, which is examined directly through the observation of the Earth’s rotation and surface motions, with no additional assumptions after fundamental physics. Rotational acceleration, polar motion, plate tectonics, and seismicity observed on the Earth’s surface indicate that the Earth’s angular momentum is perturbed and adjusting independently of external torques. (For more information,please refer to the PDF.)

Perspective of Problems and Countermeasures by the Analysis of the Collection Data on the Personal Income Tax Collection and Administration of High Income Groups  [PDF]
Chunyan Pan
Open Journal of Social Sciences (JSS) , 2015, DOI: 10.4236/jss.2015.310018
Abstract: In recent years, the collection and administration of personal income tax of high income groups have always been the emphasis and difficulty of the tax authority. This article analyzes the personal income tax collection and management data of GZ city Y area local taxation bureau, and finds that the current tax authorities on the personal income tax levy management have some problems, such as the individual income tax of the total amount of wages and salaries accounts for a large proportion of the total individual income tax, and it is difficult to regulate the individual business production and operation income and labor remuneration income, and the number of foreign individuals hidden income rise, etc. The working practice is also connected to discuss and analyze the above problems, putting forward many measures to establish and improve the system of tax assessment, building effective network for assistance and protection of tax, strengthening the collection and management of various income taxes, establishing individual tax registration system and personal bank account system, reinforcing audit and penalties and so on.
Effect of the Issuance of Convertible Bonds on the Company’s Agency Costs  [PDF]
Yu Pan
Open Journal of Social Sciences (JSS) , 2015, DOI: 10.4236/jss.2015.311022
Abstract: The separation of ownership rights and management rights on shares of a Joint-stock company leads to agency conflicts between shareholders and managers. With the separation of ownership and management of financing funds making the interests of shareholders contradict the interests of its creditors, the company’s agency costs come in to being as a result. Through an empirical research on agency costs of 79 non-financial listed companies who issued convertible bonds during the year 2002-2013 in China, whether the issuance of the convertible bond is beneficial to reduce agency cost of listed companies is examined. The empirical results show that the issuance of convertible bonds contributes to the reduction of agency costs, which supports the assumption concluded from the theoretical researches conducted by foreign researchers that convertible bonds can reduce agency costs in some extent.
Lp Polyharmonic Dirichlet Problems in the Upper Half Plane  [PDF]
Kanda Pan
Advances in Pure Mathematics (APM) , 2015, DOI: 10.4236/apm.2015.514077
Abstract: In this article, a class of Dirichlet problem with Lp boundary data for poly-harmonic function in the upper half plane is mainly investigated. By introducing a sequence of kernel functions called higher order Poisson kernels and a hierarchy of integral operators called higher order Pompeiu operators, we obtain a main result on integral representation solution as well as the uniqueness of the polyharmonic Dirichlet problem under a certain estimate.
Sustainability Study of Government Procurement of Public Services in Guangzhou—A Perspective Based on the Resources Dependence of Social Work  [PDF]
Li Pan
Open Journal of Social Sciences (JSS) , 2015, DOI: 10.4236/jss.2015.312012
Abstract: The recently prevalent government procurement of public services in China boasts a new form of government’s provision of public service through the purchasing of social work from social organizations, a new measure of the transformation in governmental functions as well as an unprecedented opportunity for the development of social organizations. For the past few years, the phenomenon of a surge in the number of social work organizations and social work staff emerged right with the initiatives of energetically carrying out the purchase of public services by the government. Such efforts have presented the strong determination of the Chinese government in building a small government by streamlining administration and delegating part of the governmental power to social organizations. This paper was based on the 2012-2014 performance appraisal project of the Guangzhou municipal government’s purchasing of public services and the project was carried out in the summer of 2015. During the process of the appraisal, several general problems hindering the sustainable development of government purchasing of public service have been observed. As Guangzhou is among the rank of pioneer cities in the conduct of the reform, it is representative and imperative to study the sustainability of government purchasing of public service. In 2012, Guangzhou local government started contracting out public service to the community social organizations to provide general family services and special services to community residents, since when integrated family service centers and special service centers were established as platforms to provide public social service in a city-wide range. Consequently, taking an example of the current rapid development of government purchase of the integrated family services and special services in Guangzhou, this paper puts up several proposals for the sustainable development of Guangzhou municipal government’s procurement of public services on the perspective of social work’s resource dependence.
Consumption Concept and People’s Choice of Financial Assets: A Research Based on CHFS 2011  [PDF]
Pan Zhu
Open Journal of Social Sciences (JSS) , 2016, DOI: 10.4236/jss.2016.44020
Abstract: As an important part of culture, consumption concept can not only influence people’s attitude about worth and wealth, but also their economical behavior and financial decisions. Based on CHFS2011 database, this paper analyzes the relationship between consumption concept and people’s choice of financial assets. The empirical results of this paper show that those who hold forward and positive consumption concept are more willing to hold risk assets than those who hold traditional and conservative consumption concept.
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