In the performance experiment of organic Rankine cycle power generation experimental system, the loadresistance-regulation method is one of the most important regulation methods. However, the regulation law has not be...In the performance experiment of organic Rankine cycle power generation experimental system, the loadresistance-regulation method is one of the most important regulation methods. However, the regulation law has not been clear enough to guide the experiment, which is unfavorable to the experimental research on organic Rankine cycle. In this paper the regulation law of turbine and generator by the load-resistance-regulation method is studied theoretically and experimentally. The results show that when the thermal cycle parameters keep constant, the turbine speed increases with the increase of load resistance and there is a maximum value of transmission-generator efficiency with the variation of the turbine speed; when the turbine speed and generator speed keep constant, the transmissiongenerator efficiency decreases and gradually tends to zero with the increase of load resistance.展开更多
It is already five years since the 10-year-old experimental law on the organization of villagers committees adopted in November 1987 by the Standing Committee of the National People’s Congress was made permanent, end...It is already five years since the 10-year-old experimental law on the organization of villagers committees adopted in November 1987 by the Standing Committee of the National People’s Congress was made permanent, ending an intense political debate about how much independence villagers committees should be given to manage village affairs and to what extent villagers should be allowed to choose their leaders. It is five years in which the implementation of villagers autonomy as defined by the law proceeded the fastest and the achievements were the most fruitful. Local laws Over the past five years, all places展开更多
China＇s high-speed railway industry achieved dazzling development over the years, but not much research has been devoted to this industry from the perspeetive of competition policy. This paper focuses on the industri...China＇s high-speed railway industry achieved dazzling development over the years, but not much research has been devoted to this industry from the perspeetive of competition policy. This paper focuses on the industrial organization of China＇s high-speed railway industry and the applicability of the Anti-Monopoly Law. We intend to answer the following questions： （l） Why is the high-speed railway industry not an industry of natural monopoly？ Which segments of the industry have elements of natural monopoly？ （2） At the level of corporate organization, what is the legal and economic rationale behind the patterns of China＇s high-speed railway undertakings evolving from government-affiliated enterprises to special legal person enterprises and then shareholding companies？ （3） The applicability of the Anti-Monopoly Law to the high-speed railway industry. Our conclusions from the perspective of competition policy are worth referencing for similar industries such as electric power, telecommunications, and water and gas supply.展开更多
The claim that there exists a transition of earthquake energy distribution between small and large earthquakes is checked using broadband radiated energy of earthquakes for global seismicity. Scattering of the relatio...The claim that there exists a transition of earthquake energy distribution between small and large earthquakes is checked using broadband radiated energy of earthquakes for global seismicity. Scattering of the relation between the magnitude and the broadband radiated energy makes it necessary to use the energy data directly. Rank-ordering statistics is applied to enhance the resolution in retrieving the power law distribution with undersampled data, namely, a few tens of events. Seen in the perspective of broadband radiated energy with higher resolution, there is no evidence for the kink in the frequency-energy distribution for large and small earthquakes. Instead, a single power law can well explain the data. For earthquakes with energy larger than 10<sup>14</sup> J, we find that the number N of events with energy E depends on E via N ∝ E-B, with the scaling constant B = 0.64 ± 0.04, corresponding to b = 0.95± 0.06.展开更多
基金Supported by the National Natural Science Foundation of China(No.51306198)the Specialized Research Fund for the Doctoral Program of Higher Education of China(No.20110032110046)
文摘In the performance experiment of organic Rankine cycle power generation experimental system, the loadresistance-regulation method is one of the most important regulation methods. However, the regulation law has not been clear enough to guide the experiment, which is unfavorable to the experimental research on organic Rankine cycle. In this paper the regulation law of turbine and generator by the load-resistance-regulation method is studied theoretically and experimentally. The results show that when the thermal cycle parameters keep constant, the turbine speed increases with the increase of load resistance and there is a maximum value of transmission-generator efficiency with the variation of the turbine speed; when the turbine speed and generator speed keep constant, the transmissiongenerator efficiency decreases and gradually tends to zero with the increase of load resistance.
文摘It is already five years since the 10-year-old experimental law on the organization of villagers committees adopted in November 1987 by the Standing Committee of the National People’s Congress was made permanent, ending an intense political debate about how much independence villagers committees should be given to manage village affairs and to what extent villagers should be allowed to choose their leaders. It is five years in which the implementation of villagers autonomy as defined by the law proceeded the fastest and the achievements were the most fruitful. Local laws Over the past five years, all places
文摘China＇s high-speed railway industry achieved dazzling development over the years, but not much research has been devoted to this industry from the perspeetive of competition policy. This paper focuses on the industrial organization of China＇s high-speed railway industry and the applicability of the Anti-Monopoly Law. We intend to answer the following questions： （l） Why is the high-speed railway industry not an industry of natural monopoly？ Which segments of the industry have elements of natural monopoly？ （2） At the level of corporate organization, what is the legal and economic rationale behind the patterns of China＇s high-speed railway undertakings evolving from government-affiliated enterprises to special legal person enterprises and then shareholding companies？ （3） The applicability of the Anti-Monopoly Law to the high-speed railway industry. Our conclusions from the perspective of competition policy are worth referencing for similar industries such as electric power, telecommunications, and water and gas supply.
文摘The claim that there exists a transition of earthquake energy distribution between small and large earthquakes is checked using broadband radiated energy of earthquakes for global seismicity. Scattering of the relation between the magnitude and the broadband radiated energy makes it necessary to use the energy data directly. Rank-ordering statistics is applied to enhance the resolution in retrieving the power law distribution with undersampled data, namely, a few tens of events. Seen in the perspective of broadband radiated energy with higher resolution, there is no evidence for the kink in the frequency-energy distribution for large and small earthquakes. Instead, a single power law can well explain the data. For earthquakes with energy larger than 10<sup>14</sup> J, we find that the number N of events with energy E depends on E via N ∝ E-B, with the scaling constant B = 0.64 ± 0.04, corresponding to b = 0.95± 0.06.
