Due to the well condition and the un-expected imbalance movement of the pumping unit in use, the energy consumes a lot. The existing balancing equipment cannot adjust and monitor the pumping units in real time. Theref...Due to the well condition and the un-expected imbalance movement of the pumping unit in use, the energy consumes a lot. The existing balancing equipment cannot adjust and monitor the pumping units in real time. Therefore this paper introduces the new adaptive balancing equipment—fan-shaped adaptive balancing intelligent device, projects a design of such control system based on PLC, and determines the principle of the control system, the execution software and the design flow. Site commissioning effect on Daqing Oilfield shows this fan-shaped adaptive balancing intelligent device can effectively adjust and monitor the pumping unit in real time, the balance even adjusts from 0.787 to 0.901, and integrated energy saving rate is 14.2%. It is approved that this control device is professionally designed, with strong compatibility, and high reliability.展开更多
The function of estuary wetland on hydrological adjustment and flooding control is studied in this paper. It is estimated that the evapotranspiration in the reed field during growth season(June to October) is 722.9 mm...The function of estuary wetland on hydrological adjustment and flooding control is studied in this paper. It is estimated that the evapotranspiration in the reed field during growth season(June to October) is 722.9 mm, which is 37.5% higher than large water body(E 601∶525.9 mm). The water replacement rate in the reed field can reach 95% only when the rains continuously for 11 days and the precipitation reached 912 mm. For the water balance in the paddy field, the total water requirement ranges between 1920 and 1860 mm, among which, 31% is from precipitation, and the left is provided by reservoirs. The water usage efficiency is 0.35 at present productivity. Based on the landscape characteristics and functionalities on flooding control, 5 functional zones are designed for the Liaohe Delta: key protected area; underground storage area; flooding discharge area; flood diversion area in emergency; and flood control drainage area.展开更多
In this study, we expanded upon the current benchmark model of external adjustment and dissected the concept of international financial adjustment into two distinct components: valuation effect and investment income. ...In this study, we expanded upon the current benchmark model of external adjustment and dissected the concept of international financial adjustment into two distinct components: valuation effect and investment income. Our enhanced model, which we refer to as “tri-channel model,” incorporates three key elements: trade balance, valuation effect, and investment income. Using a consolidated quarterly dataset that encompassed China's balance of payments and international investment positions from 1998 to 2020, we estimated the relative importance of the three newly introduced adjustment channels to China's cyclical external imbalance. We found that the trade balance channel played a major role, accounting for approximately 76 percent of cyclical external adjustment. The contribution of the investment income channel to cyclical external adjustment (21 percent) was much greater than that of the valuation effect channel (3 percent). These findings imply that policy responses to the cyclical external imbalance in China should focus more on the trade balance and investment incomes channels rather than exploiting the valuation effects.展开更多
文摘Due to the well condition and the un-expected imbalance movement of the pumping unit in use, the energy consumes a lot. The existing balancing equipment cannot adjust and monitor the pumping units in real time. Therefore this paper introduces the new adaptive balancing equipment—fan-shaped adaptive balancing intelligent device, projects a design of such control system based on PLC, and determines the principle of the control system, the execution software and the design flow. Site commissioning effect on Daqing Oilfield shows this fan-shaped adaptive balancing intelligent device can effectively adjust and monitor the pumping unit in real time, the balance even adjusts from 0.787 to 0.901, and integrated energy saving rate is 14.2%. It is approved that this control device is professionally designed, with strong compatibility, and high reliability.
文摘The function of estuary wetland on hydrological adjustment and flooding control is studied in this paper. It is estimated that the evapotranspiration in the reed field during growth season(June to October) is 722.9 mm, which is 37.5% higher than large water body(E 601∶525.9 mm). The water replacement rate in the reed field can reach 95% only when the rains continuously for 11 days and the precipitation reached 912 mm. For the water balance in the paddy field, the total water requirement ranges between 1920 and 1860 mm, among which, 31% is from precipitation, and the left is provided by reservoirs. The water usage efficiency is 0.35 at present productivity. Based on the landscape characteristics and functionalities on flooding control, 5 functional zones are designed for the Liaohe Delta: key protected area; underground storage area; flooding discharge area; flood diversion area in emergency; and flood control drainage area.
基金Wangyin Hu is grateful for financial support from Fundamental Research Funds for Central Universities,University of International Relations(No.3262024T23)Guangtao Xia thanks the Peak Strategy of Discipline Construction of the Chinese Academy of Social Sciences(No.DF2023YS41)the Laboratory of World Economic Forecasting and Policy Simulation of the Institute of World Economics and Politics of the Chinese Academy of Social Sciences(No.2024SYZH003)for their financial support.
文摘In this study, we expanded upon the current benchmark model of external adjustment and dissected the concept of international financial adjustment into two distinct components: valuation effect and investment income. Our enhanced model, which we refer to as “tri-channel model,” incorporates three key elements: trade balance, valuation effect, and investment income. Using a consolidated quarterly dataset that encompassed China's balance of payments and international investment positions from 1998 to 2020, we estimated the relative importance of the three newly introduced adjustment channels to China's cyclical external imbalance. We found that the trade balance channel played a major role, accounting for approximately 76 percent of cyclical external adjustment. The contribution of the investment income channel to cyclical external adjustment (21 percent) was much greater than that of the valuation effect channel (3 percent). These findings imply that policy responses to the cyclical external imbalance in China should focus more on the trade balance and investment incomes channels rather than exploiting the valuation effects.
