William Wordsworth is best known for his poem,The Daffodils.This paper traces the origin of daffodils in Greek mythology,the four important facts in Wordsworth’s life and the poetic theories implied in his poem The D...William Wordsworth is best known for his poem,The Daffodils.This paper traces the origin of daffodils in Greek mythology,the four important facts in Wordsworth’s life and the poetic theories implied in his poem The Daffodils.The most important part shall be the appreciation and analysis of the poem.During this course,readers may find it difficult to understand Wordsworth’s poetic theories of Romanticism.However this is made easier by asking and answering questions and by comparing Chinese and English Romantic poems.展开更多
In this study, by starting from Maximum entropy (MaxEnt) distribution of time series, we introduce a measure that quantifies information worth of a set of autocovariances. The information worth of autocovariences is m...In this study, by starting from Maximum entropy (MaxEnt) distribution of time series, we introduce a measure that quantifies information worth of a set of autocovariances. The information worth of autocovariences is measured in terms of entropy difference of MaxEnt distributions subject to different autocovariance sets due to the fact that the information discrepancy between two distributions is measured in terms of their entropy difference in MaxEnt modeling. However, MinMaxEnt distributions (models) are obtained on the basis of MaxEnt distributions dependent on parameters according to autocovariances for time series. This distribution is the one which has minimum entropy and maximum information out of all MaxEnt distributions for family of time series constructed by considering one or several values as parameters. Furthermore, it is shown that as the number of autocovariances increases, the entropy of approximating distribution goes on decreasing. In addition, it is proved that information worth of each model defined on the basis of MinMaxEnt modeling about stationary time series is equal to sum of all possible information increments corresponding to each model with respect to preceding model starting with first model in the sequence of models. The fulfillment of obtained results is demonstrated on an example by using a program written in Matlab.展开更多
The reactivity worth measurement system for control rods of the TRIGA MARK-II research reactor of Bangladesh has been design and developed. The theory of the kinetic technique of measuring reactivity has been used by ...The reactivity worth measurement system for control rods of the TRIGA MARK-II research reactor of Bangladesh has been design and developed. The theory of the kinetic technique of measuring reactivity has been used by this measurement system. The system comprises of indigenous hardware and software for online acquisition of neutron flux signals from reactor console and then computes the reactivity worth accordingly. Here for the TRIGA MARK-II research reactor, the reactivity measurement system was implemented with a dedicated circuit assembly and a conventional personal computer. A high-level Visual Basic real-time programming has been developed for data acquisition, reactivity calculation, online display (numerically as well as graphically), saving data, etc. To measure reactivity worth of TRIGA reactor control rods the rod drop experimental technique has been adopted. The results of tests experiments, carried out with the rod drop method for measuring various reactivity worth of control rods have been presented in the paper. A comparison between this results with the results using period method and that of computation method, demonstrated that the response of this reactivity measurement system is fast enough to monitor and measure the safety-related reactivity and power excursions in the reactor.展开更多
Reporter:The Chama Cha Mapinduzi(CCM)has been the ruling party of Tanzania for a long time,and under its ruling,politics in Tanzania is sound and stable.Under the leadership of H.E.President Magufuli,the CCM had produ...Reporter:The Chama Cha Mapinduzi(CCM)has been the ruling party of Tanzania for a long time,and under its ruling,politics in Tanzania is sound and stable.Under the leadership of H.E.President Magufuli,the CCM had produced a series of reform measures,including anti-corruption,public spending reduction,building an efficient and people-friendly government,etc.Could you please brief us on some of the reform measures and their effect?展开更多
Every year,it costs British students more and more to attend university. Students are graduating with larger and larger debts.So is a university degree really worth it?
The handicapped, a special group in society, usually encounter many difficulties in employment, marriage, and daily life.Some difficulties are what they cannot conquer by themselves. It is also not easy for them to in...The handicapped, a special group in society, usually encounter many difficulties in employment, marriage, and daily life.Some difficulties are what they cannot conquer by themselves. It is also not easy for them to integrate into society. However, if there is a person who helps the hand- icapped find a job, build up confidence and make their life worth; if there is a person who helps them set up their families and incorporate in a harmonious community;展开更多
Control rod is a primary control part of emergency control and power regulation in nuclear reactor. The main application of it is to control fast change of the reactivity. The theoretical analysis for the worth of con...Control rod is a primary control part of emergency control and power regulation in nuclear reactor. The main application of it is to control fast change of the reactivity. The theoretical analysis for the worth of control rod is necessary in the stage of design. Based on design requirements, some results are calculated. Firstly, control rod worth with different density of neutron absorber is calculated by MCNP here. Secondly, the study of integral and differential control rod worth is presented in this paper while the control rod is inserted into reactor core and total worth of three rods with different positions are also calculated. Finally, the effect of the axial and radial neutron flux in reactor core which is caused by the control rods is simulated. The simulation results of the control rods meet design requirements for TMSR.展开更多
文摘William Wordsworth is best known for his poem,The Daffodils.This paper traces the origin of daffodils in Greek mythology,the four important facts in Wordsworth’s life and the poetic theories implied in his poem The Daffodils.The most important part shall be the appreciation and analysis of the poem.During this course,readers may find it difficult to understand Wordsworth’s poetic theories of Romanticism.However this is made easier by asking and answering questions and by comparing Chinese and English Romantic poems.
文摘In this study, by starting from Maximum entropy (MaxEnt) distribution of time series, we introduce a measure that quantifies information worth of a set of autocovariances. The information worth of autocovariences is measured in terms of entropy difference of MaxEnt distributions subject to different autocovariance sets due to the fact that the information discrepancy between two distributions is measured in terms of their entropy difference in MaxEnt modeling. However, MinMaxEnt distributions (models) are obtained on the basis of MaxEnt distributions dependent on parameters according to autocovariances for time series. This distribution is the one which has minimum entropy and maximum information out of all MaxEnt distributions for family of time series constructed by considering one or several values as parameters. Furthermore, it is shown that as the number of autocovariances increases, the entropy of approximating distribution goes on decreasing. In addition, it is proved that information worth of each model defined on the basis of MinMaxEnt modeling about stationary time series is equal to sum of all possible information increments corresponding to each model with respect to preceding model starting with first model in the sequence of models. The fulfillment of obtained results is demonstrated on an example by using a program written in Matlab.
文摘The reactivity worth measurement system for control rods of the TRIGA MARK-II research reactor of Bangladesh has been design and developed. The theory of the kinetic technique of measuring reactivity has been used by this measurement system. The system comprises of indigenous hardware and software for online acquisition of neutron flux signals from reactor console and then computes the reactivity worth accordingly. Here for the TRIGA MARK-II research reactor, the reactivity measurement system was implemented with a dedicated circuit assembly and a conventional personal computer. A high-level Visual Basic real-time programming has been developed for data acquisition, reactivity calculation, online display (numerically as well as graphically), saving data, etc. To measure reactivity worth of TRIGA reactor control rods the rod drop experimental technique has been adopted. The results of tests experiments, carried out with the rod drop method for measuring various reactivity worth of control rods have been presented in the paper. A comparison between this results with the results using period method and that of computation method, demonstrated that the response of this reactivity measurement system is fast enough to monitor and measure the safety-related reactivity and power excursions in the reactor.
文摘Reporter:The Chama Cha Mapinduzi(CCM)has been the ruling party of Tanzania for a long time,and under its ruling,politics in Tanzania is sound and stable.Under the leadership of H.E.President Magufuli,the CCM had produced a series of reform measures,including anti-corruption,public spending reduction,building an efficient and people-friendly government,etc.Could you please brief us on some of the reform measures and their effect?
文摘Every year,it costs British students more and more to attend university. Students are graduating with larger and larger debts.So is a university degree really worth it?
文摘The handicapped, a special group in society, usually encounter many difficulties in employment, marriage, and daily life.Some difficulties are what they cannot conquer by themselves. It is also not easy for them to integrate into society. However, if there is a person who helps the hand- icapped find a job, build up confidence and make their life worth; if there is a person who helps them set up their families and incorporate in a harmonious community;
基金Supported by "Strategic Priority Research Program" of the Chinese Academy of Science (XDA02001003)
文摘Control rod is a primary control part of emergency control and power regulation in nuclear reactor. The main application of it is to control fast change of the reactivity. The theoretical analysis for the worth of control rod is necessary in the stage of design. Based on design requirements, some results are calculated. Firstly, control rod worth with different density of neutron absorber is calculated by MCNP here. Secondly, the study of integral and differential control rod worth is presented in this paper while the control rod is inserted into reactor core and total worth of three rods with different positions are also calculated. Finally, the effect of the axial and radial neutron flux in reactor core which is caused by the control rods is simulated. The simulation results of the control rods meet design requirements for TMSR.
