Study on the Theory and Method of Real Estate Property Right Appraisal

This paper first introduces the overview of real estate appraisal theory,the basic situation of real estate appraisal,the basic principles and characteristics of real estate appraisal,and three main appraisal methods.On this basis,the specific use scope of each method,the meaning of each parameter,and the influencing factors are analyzed.Then,based on the in-depth study of various existing appraisal theories and methods,a new appraisal method is proposed:the appraisal analysis method based on fuzzy analytic hierarchy process.

Influence of Real Gas Properties on Aerodynamic Losses in a Supercritical CO_(2) Centrifugal Compressor

Supercritical carbon dioxide(SCO_(2))centrifugal compressor is a key component of a closed Brayton cycle system based on SCO_(2).A comprehensive understanding of the loss mechanism within the compressor is vital for its optimized design.However,the physical properties of SCO_(2) are highly nonlinear near the critical point,and the internal flow of the compressor is closely related to its properties,which inevitably influences the generation of aerodynamic losses within the compressor.This paper presents a comprehensive investigation of the compressor's loss mechanism with an experimentally validated numerical method.The real gas model of CO_(2) embodied in the Reynolds-Averaged Navier-Stokes(RANS)model was used for the study.Firstly,the numerical simulation method was validated against the experimental results of Sandia SCO_(2) compressor.Secondly,performance and loss distribution of the compressor were compared among three fluids including SCO_(2),ideal CO_(2)(ICO_(2))and ideal air(IAir).The results showed that the performance of SCO_(2) was comparable to IAir under low flow coefficient,however markedly inferior to the other two fluids at near choke condition.Loss distribution among the three fluids was distinctive.In the impeller,SCO_(2) was the most inefficient,followed by ICO_(2) and IAir.The discrepancies were magnified as the flow coefficient increased.This is due to a stronger Blade-to-Blade pressure gradient that intensifies boundary layer accumulation on walls of the shroud/hub.Furthermore,owing to the reduced sonic speed of SCO_(2),a shock wave appears earlier at the throat region and SCO_(2) encounters more intenseboundarylayerseparation.

A Real Punch to property

The Chinese Government recently announced a new series of forcefult measures to cool the bubbling property market The property bubble in China is about to burst.And the bearish property market could last for as long as five years,said Xie Guozhong,an independent economist and director of Rosetta Stone Capital Ltd.,on his blog.

Impacts of Property Tax Levy on Housing Price and Rent:Theoretical Models and Simulation with Insights on the Timing of China Adopting the Property Tax

What will be the impact of property tax levy(RPT)on China’s housing price?The conclusions from existing research are conflicting,failing to pinpoint how RPT will affect housing price and rent.More crucially,theoretical economic models are missing in clearly describing the operating mechanisms of the tax’s impact.Starting with a theoretical model of RPT,housing price and rent,the paper derives the path and mechanism of RPT affecting housing price and rent,and provides insights on the choice of timing for China to adopt and levy RPT.Our simulation results show that under China’s circumstances,if the effective RPT rate is 0.5%and the RPT revenue is not used to increase public services,the tax may cause a housing price decline between 8.3%and 12.5%.If the RPT revenue is used for basic public services,the housing price decline will be as small as 1.7%to 2.5%,but rent may rise by 6.7%to 20%.The reason for the sharp drop in housing price is the bubble;the premise of a rent hike is that the public services that renters can benefi t from are substantially improved.Based on the impact of RPT on housing price fluctuation,the period after the market has gradually squeezed out the housing price bubble may be among the best windows for adopting RPT.