Yangtze River Delta （YRD） area is one of the important economic zones in China. However, this area faces increasing environmental problems. In this study, we use ground-based multi-axis differential optical absorpti...Yangtze River Delta （YRD） area is one of the important economic zones in China. However, this area faces increasing environmental problems. In this study, we use ground-based multi-axis differential optical absorption spectroscopy （MAX-DOAS） network in Eastern China to retrieve variations of NO2, SO2, and formaldehyde （HCHO） in the YRD area. Three cities of YRD （Hefei, Nanjing, and Shanghai） were selected for long-term observations. This paper presents technical performance and characteristics of instruments, their distribution in YRD, and results of vertical column densities （VCDs） and profiles of NO2, SO2, and HCHO. Average diurnal variations of tropospheric NO2 and SO2 in different seasons over the three stations yielded minimum values at noon or in the early afternoon, whereas tropospheric HCHO reached the maximum during midday hours. Slight reduction of the pollutants in weekends occurred in all the three sites. In general trace gas concentrations gradually reduced from Shanghai to Hefei. Tropospheric VCDs of NO2, SO2, and HCHO were compared with those from Ozone Monitoring Instrument （OMI） satellite observations, resulting in R2 of 0.606, 0.5432, and 0.5566, respectively. According to analysis of regional transports of pollutants, pollution process happened in YRO under the north wind with the pollution dissipating in the southeast wind. The feature is significant in exploring transport of tropospheric trace gas pollution in YRD, and provides basis for satellite and model validation.展开更多
In the transition from ＂made in China＂ to ＂invented in China,＂ what is the motivation of Chinese firms in applying for patents？ Why do some firms bypass patents？ How is patenting developing within Chinese firms...In the transition from ＂made in China＂ to ＂invented in China,＂ what is the motivation of Chinese firms in applying for patents？ Why do some firms bypass patents？ How is patenting developing within Chinese firms？ This paper attempts to answer these questions using data of Chinese firms in the Yangtze River Delta region. Results indicate that, for product innovation, obtaining the lead time for market entry is of top priority in innovation protection, followed by confidentiality and patent protection. As for process innovation, confidentiality ranks first, followed by patent protection and obtaining the lead time. There is a significant and positive relationship between prior experience of patent licensing and possibility of future patent licensing. Firms with painful patent litigation experience tend to avoid it in the future. It is also found that there are great differences in patent behaviors between Chinese enterprises and their foreign counterparts.展开更多
基金supported by the National Natural Science Foundation of China (No: 41530644)the Monitoring and Assessment of Regional Air Quality in China using space Observations, Project Of Long-term sino-5 european co-Operation (MarcoPolo), FP7 (No: 606953)
文摘Yangtze River Delta （YRD） area is one of the important economic zones in China. However, this area faces increasing environmental problems. In this study, we use ground-based multi-axis differential optical absorption spectroscopy （MAX-DOAS） network in Eastern China to retrieve variations of NO2, SO2, and formaldehyde （HCHO） in the YRD area. Three cities of YRD （Hefei, Nanjing, and Shanghai） were selected for long-term observations. This paper presents technical performance and characteristics of instruments, their distribution in YRD, and results of vertical column densities （VCDs） and profiles of NO2, SO2, and HCHO. Average diurnal variations of tropospheric NO2 and SO2 in different seasons over the three stations yielded minimum values at noon or in the early afternoon, whereas tropospheric HCHO reached the maximum during midday hours. Slight reduction of the pollutants in weekends occurred in all the three sites. In general trace gas concentrations gradually reduced from Shanghai to Hefei. Tropospheric VCDs of NO2, SO2, and HCHO were compared with those from Ozone Monitoring Instrument （OMI） satellite observations, resulting in R2 of 0.606, 0.5432, and 0.5566, respectively. According to analysis of regional transports of pollutants, pollution process happened in YRO under the north wind with the pollution dissipating in the southeast wind. The feature is significant in exploring transport of tropospheric trace gas pollution in YRD, and provides basis for satellite and model validation.
文摘In the transition from ＂made in China＂ to ＂invented in China,＂ what is the motivation of Chinese firms in applying for patents？ Why do some firms bypass patents？ How is patenting developing within Chinese firms？ This paper attempts to answer these questions using data of Chinese firms in the Yangtze River Delta region. Results indicate that, for product innovation, obtaining the lead time for market entry is of top priority in innovation protection, followed by confidentiality and patent protection. As for process innovation, confidentiality ranks first, followed by patent protection and obtaining the lead time. There is a significant and positive relationship between prior experience of patent licensing and possibility of future patent licensing. Firms with painful patent litigation experience tend to avoid it in the future. It is also found that there are great differences in patent behaviors between Chinese enterprises and their foreign counterparts.
