OALib Journal期刊

ISSN: 2333-9721




2018 ( 5 )

2017 ( 10 )

2016 ( 10 )

2015 ( 92 )


匹配条件: “Zhan Zhan” ,找到相关结果约3963条。
The Harmonic Functions on a Complete Asymptotic Flat Riemannian Manifold  [PDF]
Huashui Zhan
Advances in Pure Mathematics (APM) , 2011, DOI: 10.4236/apm.2011.12003
Abstract: Let be a simply connected complete Riemannian manifold with dimension n≥3 . Suppose that the sectional curvature satisfies , where p is distance function from a base point of M, a, b are constants and . Then there exist harmonic functions on M .
The Manifolds with Ricci Curvature Decay to Zero  [PDF]
Huashui Zhan
Advances in Pure Mathematics (APM) , 2012, DOI: 10.4236/apm.2012.21008
Abstract: The paper quotes the concept of Ricci curvature decay to zero. Base on this new concept, by modifying the proof of the canonical Cheeger-Gromoll Splitting Theorem, the paper proves that for a complete non-compact Riemannian manifold M with Ricci curvature decay to zero, if there is a line in M, then the isometrically splitting M = R × N is true.
A Kind of Neither Keynesian nor Neoclassical Model (1): The Fundamental Equation  [PDF]
Ming’an Zhan, Zhan Zhan
Open Access Library Journal (OALib Journal) , 2016, DOI: 10.4236/oalib.1103207
This paper is different from the existing macroeconomic theory. It derives the relationship between the various macroeconomic variables from the Cobb-Douglas function, and uses statistical data in United States to verify these equations. We find that the Cobb-Douglas function is obtained in the case that the marginal output is not 0, therefore it is a function with dynamic properties. On this basis, we use the difference between the compound output and simple output to determine the incremental output of a period, and its relationship with capital, interest rate, investment and other variables. These relations not only deny the premise of Keynesian theory, but also because the proof of the investment is not equal to the incremental capital, leaving the investment, output growth, business cycle and other neoclassical theory crisis.
A Kind of Neither Keynesian Nor Neoclassical Model (2): The Business Cycle  [PDF]
Ming’an Zhan, Zhan Zhan
Open Access Library Journal (OALib Journal) , 2016, DOI: 10.4236/oalib.1103215
The Cobb-Douglas function not only leads to a long-term relationship between the rate of output change and the interest rate, but also analyzes why they fluctuate in the short-term. This paper first divides the fluctuation cycle of the interest rate in the statistical data of the past 45 years by using the mathematical phase diagram method, and draws the phase diagram of the rate of output change on the interest rate according to the cycle equation of output. From this phase diagram, we explain the reason that the phase difference between the interest rate and the rate of output change in the fluctuation. Then, according to the optimal relation between L and K in the Cobb-Douglas function, we further derive the employment equation and its relation to the real interest rate and the rate of real output change, and verify the theoretical speculation with statistical data. Finally, it is concluded that the business cycle is a kind of endogenous production phenomenon.
A Kind of Neither Keynesian Nor Neoclassical Model (3): The Decision of Inflation  [PDF]
Ming’an Zhan, Zhan Zhan
Open Access Library Journal (OALib Journal) , 2017, DOI: 10.4236/oalib.1103333
The difficulty of inflation theory is to explain the fluctuations of the price level in short-term. First, we use the relationship between price and money in the traditional quantity equation to derive the inflation equation that can explain changes of the price level in the long-term and short-term. Then, by analyzing the phase diagram of the single variable and the complex variable in the inflation equation, we find that the fundamental reason of the periodic change of the short-term price is the periodic change of the real interest rate. Because fluctuations of the inflation rate and interest rate are the same in phase, so there is no difference in the business cycle. Finally, this paper analyzes the rise and fall of core price under the influence of money and real interest rate respectively. It lays the foundation for further discussion of the relationship between inflation and unemployment in Phillips curve.
A Kind of Neither Keynesian Nor Neoclassical Model (4): The Nature of Philips Curve  [PDF]
Zhan Zhan, Mingan Zhan
Open Access Library Journal (OALib Journal) , 2017, DOI: 10.4236/oalib.1103388
Officials always want to use the replacement relationship between the unemployment rate and the price of the Phillips curve to reduce the unemployment rate, but things go crisscross. The reason is that there is no causal relationship between price and unemployment. In this paper, it demonstrates the Phillips curve is derived from the unemployment cycle equation and the inflation equation. And then, it discusses the influence of core variables and fluctuating variables on Phillips curve and the cause of distortion or complete disappearance of Phillips curve. Finally, this paper discusses monetary neutrality and related monetary policy issues. The policy that is conducive to the smooth operation of the system is consistent with the constant money supply of the economic cycle, rather than counter-cyclical regulation.
A Kind of Neither Keynesian Nor Neoclassical Model (5): The Path of Economic Growth  [PDF]
Zhan Zhan, Ming’an Zhan
Open Access Library Journal (OALib Journal) , 2017, DOI: 10.4236/oalib.1103525
Traditional macroeconomic theory is difficult to analyze the long-term growth and short-term decisions of output in a unified model. In this paper, the concept of “unit resource output” is proposed by using the difference of production factors combination on different rays in Cobb-Douglas function, and its maximization condition is derived according to algebraic principle. And then we use this condition to explain the reason why the distribution parameter α in the Cobb-Douglas function is growing continuously in the US statistical data and predict the evolution path of the factor combination in the growth of the output. Finally, this paper compares the important differences between our model and the Solow model.
A Kind of Neither Keynesian Nor Neoclassical Model (6): The Ending State of Economic Growth  [PDF]
Ming’an Zhan, Zhan Zhan
Open Access Library Journal (OALib Journal) , 2017, DOI: 10.4236/oalib.1103589
In traditional macroeconomics argues that the decision and fluctuation of output level is short-term theory, and the growth of output is a long-term theory. The former is determined by the demand; the latter is determined by the production. No one has questioned why the former is determined by production and the latter is determined by demand. This paper argues that the factors that affect the output are the same in the short and long term, but there is no need to analyze the problem of fluctuation in the long term. Based on the analysis of the growth path in our previous paper, this paper first examines whether our model is applicable to the Pontryagin maximum principle, and then analyzes the difference of the Cobb-Douglas function in the exogenous growth model and the endogenous growth model. Reveal the special role of parameter A in Cobb-Douglas function: as long as A is considered as output-related variables, there is no substantial difference between the so-called exogenous model and endogenous mode. Finally, according to the trend of the growth path and the nature of A, the paper derives the final state of Cobb-Douglas function.
A Kind of Neither Keynesian Nor Neoclassical Model (7): The Cause of the Financial Crisis  [PDF]
Zhan Zhan, Ming’an Zhan
Open Access Library Journal (OALib Journal) , 2018, DOI: 10.4236/oalib.1105084
There are two reasons for the financial crisis. One is the spontaneous specula-tion in the capital market. The P/E ratio of the speculative object is much high-er than the ratio of capital to output in the factual economic system. The other is the crisis triggered by the bubble environment. In addition, inflation has a strong inhibitory effect on asset bubbles, and high inflation and asset bubbles will not occur at the same time. These can be verified by statistical data and theoretical explanation from the marginal state equation of Cobb-Douglas function.
Design and Implementation of Clinic Appointment Registration System  [PDF]
Xiuju Zhan, Xiufeng Liu
Engineering (ENG) , 2013, DOI: 10.4236/eng.2013.510B108

Clinic Appointment Registration System is an important way to see a doctor, and it’s also a preliminary tool for storage and management of clinic medical records. This new system was developed using Visual Studio 2008 and C#.NET as the development environment and tools and Microsoft Access 2003 as the database to store the medical data based on Browse/Server (B/S) model. The system consists of several data operation functions including appointment registration, data management (e.g. addition, deletion and searching), data backup and recovery, etc., thus, achieve key research ob-jectives.



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