摄像机维修的基本思路

本文结合专业摄像机的结构原理 ,强调故障初步检查的必要性 ,针对故障现象进行化区域分析 ,分步浅谈各部分的维修思路与方法 ,注意检修的常规要领。

Benefit analysis of curb parking and study on its optimization model

Curb parking lot is a major part of city parking facility with lots of problems, especially in CCA (citycenter area and it has a lot of advantages and has much effect on dynamic traffic as well. It is therefore necessaryto control the scale of curb parking. Basing the whole benefits of the traffic system and considering the minimumsynthetical cost on curb parking, a optimization model is brought forward of cur. b parking planning in CCAbased on minimum generalized cost. Based on this model, the scale of curb parking can be defined reasonablyto make the whole benefits of traffic system optimum in CCA.

The Relevance of CARICOM＇s Existence to the Virgin Islands in the Context of Globalization

The purpose of this study was to consider the relevance of CARICOM＇s existence to the Virgin Islands （BVI）. Its relevance becomes more significant to the BVI and the Caribbean, by extension, when the globalization phenomenon is applied; a phenomenon that has been in existence for centuries. Overall, the study concluded that even though the BVI remains only an associate member of CARICOM and not of CSME, it still has an interest in the progress of the regional grouping and its trade initiatives. Over the years, CARICOM has been struggling with its identity as a unified grouping. Nonetheless, it was found that in an effort to combat the trade liberalization process, the grouping must find that inner connection to advance its agenda on the global stage. Accordingly, it has been suggested that CARICOM begin to focus on its strengths and opportunities in order for economic development across the region to occur. It has also been recommended that more serious considerations be taken towards the development of a comprehensive regional market for the trading of goods and services, that is, the Caribbean Single Market and Economy （CSME）. To substantiate its findings, the paper used the qualitative research approach, combined with a situation （SWOT） analysis.

Extraction and Dynamic Spatial-Temporal Changes of Grassland Deterioration Research Hot Regions in China

The authors use a web crawler to retrieve all periodical articles from CNKI between the 1950 s and 2016 and then parse the abstracts of 293368 articles about grassland deterioration by word segmentation, location matching and other methods. The authors also construct a research hot regions extraction model of grassland deterioration in China based on a comprehensive research hot regions index of toponyms and then analyze the spatial pattern and dynamic change in research hot regions of grassland deterioration in China. The research shows the following：（1） The spatial heterogeneity of grassland deterioration in China can be effectively described by a model of grassland deterioration based on the comprehensive research hot regions index.（2） The research hot regions of grassland deterioration are mainly distributed in most regions of Inner Mongolia, Xinjiang, Qinghai, Tibet, Gansu and other provinces. The northeastern region of Inner Mongolia（such as Hulunbeier） and the eastern region of Inner Mongolia（such as Xilin Gol, Chifeng and Wulanchabu） are significant hot regions in the study of grassland deterioration.（3） The number of high research hot regions increases from 81 in the 1950 s to 99 in the 2000s; the area increases from 1.038 million km2 to 1.146 million km2. The degree of hot for grassland deterioration research in 197 counties showed an upward trend. This paper also discusses the relationship between the region of research hot regions and the region of grassland deterioration and then indicates the differences between them in time matching, space matching and concept matching.

Study of Substrate and Physico-Chemical Base Classification of the Rivers of Nepal

The rivers in Nepal are classified in terms of geographical regions but a more scientific classification such as on the ba-sis of morphology is clearly lacking. This study was done in 9 rivers namely Jhikhukhola of the Koshi system, Aandhikhola, Arungkhola, East Rapti, Karrakhola, Seti and main channel Narayani of the Gandaki system, and two independent systems within Nepal, Bagmati and Tinau. Among the morphologies, river bed or the substratum was taken as the main variable for the analysis which was categorized into 7 types as rocks, boulders, cobbles, pebbles, gravels, sand and silt. There were 23 sampling sites each with 2 stretches of around 100m in those rivers. The data were taken as a percentage, and to avoid biases it was observed visually by the same person for a complete year in every season. With 23 sites each with 2 stretches and 4 replicates corresponding to 4 seasons, there are altogether 184 observations, each termed as a case, that constitute this work. Canonical Discrimination Analysis (CDA) which is most suitable when the data pool is huge was applied to see if the rivers studied distinguish themselves in terms of its morphology. The result was remarkably successful and was close to the established regional classification of the rivers. This kind of river classification has great application in the utilization, conservation and restoration of the most important natural re-source of the country.