沙漠化评价基本理论初探

沙漠化评价的原则、内容和方法紧密联系。沙漠化研究内容决定其评价内容。沙漠化地图的合适信息负载量，决定各种比例尺的沙漠化评价指征的详细程度，也决定沙漠化分级数与分类数。分级数的下限是沙漠化允许值。

Semi-reference image quality metric for virtual view images in free-viewpoint television

A semi-reference image quality assessment metric based on similarity measurement for synthesized virtual viewpoint image （VVI） in free-viewpoint television system （FFV） is proposed in this paper. The key point of the proposed metric is taking resemblant information between VVI and its neighbor view images for quality assessment to make our metric to be extended to multi-semi-reference image quality assessment easily. The proposed metric first extracts impact factors from image features, then combines an image synthesis technique and similarity functions, in which, disparity information are taken into account for registering the resemblant regions. Experiments are divided into three phases. Phase I is to verify the validation of the proposed metric by taking impaired images and original reference into account. The experimental results show the agreement between evaluation scores and bio-characteristic of human visual system. Phase II shows the accordance with Phase I by taking neighbor view as reference. The proposed metric can be taken as a full reference one to evaluate the image quality even though the original reference is absent. Phase III is then performed to evaluate the quality of WI. Evaluation scores in the experimental results are able to evaluate the quality of VVI.

Research and Evaluationon Ecotourism Resources of Jilong Valleyin Everest National Nature Reserve

Jilong is a place behind The Himalayas,which is almost isolated from the world.There is typical vertical ecosystem thanks to its special geological environment. So it is honored as “the most abundant species gene warehouse in the Plateau Area”and “the most beautiful valley in the world”.To exploit this valleyis necessary along with the construction of Jilong Porton the border of Sino-Nepal. Based on the research on the spot,the ecological resources there are evaluated and an idea that regards hiking tourism asmain form and ecotourismas the theme is put forward in this paper,which explores a way to develop the valley on the basis of sustainability.

Health related quality of life:is it another comprehensive evaluation indicator of Chinese medicine on acquired immune deficiency syndrome treatment?

Health related quality of life(HRQOL) can better reflect changes in acquired immune deficiency syndrome(AIDS) patients and inform economic evaluation of AIDS treatment services,and the assessment of HRQOL can help us to detect problems that may influence the progression of the disease,hence HRQOL has become a particularly important assessment indictor for HIV comprehensive interventions.Being a multi-angle,multi-level,and diversified complex intervention,roles of Chinese medicine(CM) in AIDS treatment have been recognized and accepted by more and more patients,and HRQOL has been widely used to evaluate the comprehensive management effects of CM on AIDS.In this article,the authors analyze the definition and measurement of HRQOL,measurement of HRQOL of HIV/AIDS patients and effects of CM on AIDS,and give some reasonable advices for the usage of the scale of HRQOL.The authors hold that some new HRQOL instruments specific for CM treatment of AIDS should be developed and further prospective studies should be carried out to demonstrate the practicality,reliability and validity of HRQOL as an evaluation indictor for CM treatment of AIDS.

Loss on Ignition-Based Indices for Evaluating Organic Matter Characteristics of Littoral Sediments

Understanding organic matter characteristics （e.g., amount and state） of sediments is necessary for evaluating both the sediment and water environments; however, methods that have been proposed to investigate these characteristics are relatively expensive. This study attempted to evaluate the organic matter characteristics of littoral sediments by employing solely the loss on ignition （LOI） method, which is the most economical and accessible method in developing countries. Different types of sediments were first oven dried at 100 ~C and then continuously burned at 200, 300, 400, 500, and 600 ~C for 4 h at each temperature. The mass LOI at each temperature was calculated and compared with the 100 ℃oven-dried weight. Our results suggested that the mass LOI across the temperature range of 200-300 ℃（LOI200-300）：mass LOI at 600 ℃ （LOI600） ratio （LOI200-300/LOI600） could represent different types of sediments as well as the organic matter：organic C ratio. Compared with the sediments unaffected by wastewater, the sediments that were more influenced by the inflow of domestic wastewater had a higher LOI200-300/LOI600. Interestingly, LOI200-300/LOI600 could also represent changes in the organic matter characteristics as a function of organic matter decomposition in sediments. In conclusion, the organic matter characteristics of littoral sediments could be evaluated using solely the LOI method, particularly with LOI200 - 300/LOI600.