港台房地产业指标体系比较研究及其对国内的借鉴度

在对港台反映房地产业在国民经济中的地位与作用、反映房地产实物供给形态、反映房地产价值形态、反映房地产市场需求状况以及房地产金融服务等方面的指标体系进行了大量的可行性实证分析和系统性的比较研究之后 ,本文指出了港台房地产指标体系的共有性和差异性之所在 ,并讨论了对中国内陆建立房地产业指标体系的可借鉴之处 。

Disentanglement of Two Qubits Coupled to an XY Spin Chain at Finite Temperature

The disentanglement evolution of bipartite spin-1/2 system coupled to a common surrounding XY chain in transverse fields at nonzero temperature is studied in this letter. The dynamical process of the entanglement is numerically and analytically investigated. We find that thermal effects can enhance disentanglement if the entangled initial state of the central spins does not in the decoherence free space. The critical phenomenon of quantum phase transitions reflected in the disentanglement can be washed out by the thermal effect eventually.

Empirical Study on the Measurement of the High-Tech Industry Efficiency in China--Based on the Data of China＇s 31 Provinces （Including Municipalities and Autonomous Regions）

To evaluate the relative effectiveness of the input and output of the high-tech industry in China＇s 31 provinces （including municipalities and autonomous regions）, DEA evaluation model was constructed using data envelopment analysis （DEA）, and DEA evaluation model was solved using Deap2.1 software, for the purpose of obtaining the DEA efficiency and the non-DEA efficiency in all the provinces （including municipalities and autonomous regions）. Then, the comprehensive efficiency, technical efficiency, scale efficiency, scale return, and projection analysis were analyzed. Finally, the provinces of the non-DEA efficiency are sorted according to three efficiencies, and also a goal of improvement is proposed for the purpose of expanding technology investment in the provinces of the DEA efficiency.

Monte Carlo Simulation of Spin Glasses Using Vector Spin Model in 3D

In the present work, the possibility of existence of spin glass phase using classical Heisenberg model with Edwards-Anderson type of interactions has been explored employing Monte Carlo simulation of Binder parameter （g （L, T））. Previous experimental studies show that there is finite temperature phase transition but this study indicates that there is no finite temperature phase transition in 3D Heisenberg vector spin glass model.

Numerical Homogenization of the Elliptic Problem with Rapidly Varying Tensor or Boundary Condition

Homogenization is concerned with obtaining the average properties of a material. The problem on its own has no easy solution, except in cases like the periodic case, when it can be obtained in closed form. In this paper we consider a numerical solution of the elliptic homogenization problem for the case of rapidly varying tensor or boundary conditions. The method makes use of an adaptive finite element method to correctly capture the rapid change in the tensor or boundary condition. In the numerical experiments we vary the mesh size and do a posteriori error analysis on test problems.

Impact of different regeneration patterns of old-growth Chinese fir on quantity and quality of soil organic carbon

Chinese fir is one of the largest distributions of commercial forest plantation in South China. In this study, we chose the different regeneration patterns of Chinese fir for our researches, the results showed different regeneration patterns affected both the quantity and quality of soil organic carbon. clear cutting followed by different regeneration in old-growth Chinese fir decreased the quantity of soil organic carbon both in artificial regeneration forest and natural regeneration forest, and both of them were significantly different with the old-growth Chinese fir forest （p〈0.05）. The concentrations of soil organic carbon（SOC） and particulate organic carbon（POC） in natural regeneration forest were higher than those in artificial regeneration forest, and the difference was significant in the 0-5 cm layer （p〈0.05）. Different regeneration patterns decreased forest SOC storage. Compared with the old-growth Chinese fir, SOC storage in 0-100 cm layer decreased by 7.09% and 13.27% in natural regeneration forest and artificial regeneration forest respectively, and the differences were both significant （p〈0.05）. In addition, SOC storage in 0-100 cm layer of natural regeneration forest was 7.13% higher than that in artificial regeneration forest.

Assisted Natural Remediation of a Trace Element-Contaminated Acid Soil:An Eight-Year Field Study

There are many remediation techniques for organic contaminated soils,but relatively few of them are applicable to trace elementcontaminated soils.A field experiment was carried out to investigate assisted natural remediation(ANR) of an acid soil contaminated by As,Cd,Cu,Zn and Pb using one inorganic amendment,sugar beet lime(SL),and two organic amendments,biosolid compost(BC)and leonardeite(LE).The experiment was arranged in a completely randomized block design with four treatments in three replicates:1) a non-amended control(NA);2) SL amended at 30 Mg ha^(-1) year^(-1);3) BC amended at 30 Mg ha^(-1) year^(-1) and 4) LE amended at 20 Mg ha^(-1) year^(-1) plus SL amended at 10 Mg ha^(-1) year^(-1)(LESL).The amended plots received two doses of each amendment(DO2):one in October 2002 and another in October 2003.The plots were then divided in half into two subpolts and one subplot received another two doses of the same amendments(DO4) in October 2005 and October 2006.In 2011,the pH values of the amended soils were greater than that of the NA soil,with the SL-amended soil showing the highest pH.Total organic carbon(TOC) was also greater in the amended soil,and greater with DO4 than with DO2.Amendments reduced the concentrations of 0.01 mol L^(-1) CaCl_2-extractable Cd,Cu and Zn,especially in the SL-amended soil.Plant cover of colonizing vegetation was enhanced by amendments,but was independent of amendment doses.Changes in soil properties from 2003 to 2011 showed that the first amendment application of DO2 caused a high differentiation between all the amendment treatments and the NA treatment.After the second application of DO2,soil pH and TOC continued increasing slowly.Further two applications of amendments(DO4) caused differences only in the organic treatments.Plant cover increased over time in all the treatments including NA.It could be concluded that the slow and steady natural remediation of this soil could be enhanced by amendment application(ANR).

Analysis of effective capacity for free-space optical communication systems over gamma-gamma turbulence channels with pointing errors

To facilitate the efficient support of quality-of-service(Qo S)for promising free-space optical(FSO)communication systems,it is essential to model and analyze FSO channels in terms of delay Qo S.However,most existing works focus on the average capacity and outage capacity for FSO,which are not enough to characterize the effective transmission data rate when delay-sensitive service is applied.In this paper,the effective capacity of FSO communication systems under statistical Qo S provisioning constraints is investigated to meet heterogeneous traffic demands.A novel closed-form expression for effective capacity is derived under the combined effects of atmospheric turbulence conditions,pointing errors,beam widths,detector sizes and Qo S exponents.The obtained results reveal the effects of some significant parameters on effective capacity,which can be used for the design of FSO systems carrying a wide range of services with diverse Qo S requirements.

Line-profile analysis of excitation spectroscopy in the even 4p^5(~2P_(1/2))nl′ [K′]_J(l′=1,3) autoionizing resonances of Kr

The even-parity autoionizing resonance series 4p^5np＇ [3/2] 1,2, [ 1/2] 1, and 4p^2nf＇ [5/213 of krytpon have been investigated by laser excitation from the two metastable states 4p55s [3/2]2 and 4p^55s＇ [1/2]0 in the photon energy region of 2900（P40000 cm^-1 at experimental bandwidth of -0.1 cm-1. The excitation spectra of the even-parity autoionizing resonance series, most of which are experimentally studied for the first time in this work, show typical asymmetric line shapes. Complementary information on level energies, quantum defects, line profile indices and resonance widths, resonance lifetimes and reduced widths of the auto- ionizing resonances are derived by Fano-type line-shape analyses of the experimental results. Results from this work indicate that the line profile index （q） and the resonance width （F） are approximately proportional to the effective principal quantum number （n＊）; the line separation of the 4p^5np＇ autoionizing resonances is also in good agreement with theoretical model

Comparison of magnetic properties of DNA-cetyltrimethyl ammonium complex with those of natural DNA

We prepared the DNA-cetyltrimethyl ammonium complex, as well as the same complex intercalated with stable organic free radicals, and studied their magnetic properties by electron magnetic resonance (EMR) spectroscopy and by measuring the magnetization on a superconducting quantum interference device (SQUID). The UV-vis and CD spectra of DNA-quaternary alkyl ammonium complex (DNA--Q+) in organic solvent clearly demonstrated that it retained the double helical B-form conformation. The interhelical spacing of double strand DNA (dsDNA) increased when the counter ions (Na+) of phosphate groups of the natural DNA were replaced with the long alkyl quaternary ammonium groups. The inter-helical distance of DNA-cetyltrimethyl ammonium (CTMA) was 39.1 as confirmed by X-ray diffractometry. In general, the magnetization of the DNA-CTMA complex solid was found to be significantly lower than that of natural DNA. Moreover, intercalation of the complex with stable organic free radicals did not improve magnetization, which again was in marked contrast to natural DNA. EMR spectroscopic behavior of the complex in the solid state also was quite different from that of natural DNA: The unique broad EMR signal of natural DNA in the low field region with g-value greater than 10 disappeared in the DNA-CTMA complex.