Data sparseness has been an inherited issue of statistical language models and smoothing method is usually used to resolve the zero count problems. In this paper, we studied empirically and analyzed the well-known smo...Data sparseness has been an inherited issue of statistical language models and smoothing method is usually used to resolve the zero count problems. In this paper, we studied empirically and analyzed the well-known smoothing methods of Good-Turing and advanced Good-Turing for language models on large sizes Chinese corpus. In the paper, ten models are generated sequentially on various size of corpus, from 30 M to 300 M Chinese words of CGW corpus. In our experiments, the smoothing methods;Good-Turing and Advanced Good-Turing smoothing are evaluated on inside testing and outside testing. Based on experiments results, we analyzed further the trends of perplexity of smoothing methods, which are useful for employing the effective smoothing methods to alleviate the issue of data sparseness on various sizes of language models. Finally, some helpful observations are described in detail.展开更多
It is an undeniable fact that the success or the failure of any given society or community of human beings depends largely on who controls the affairs of that group.A leader without a clear vision and setting objectiv...It is an undeniable fact that the success or the failure of any given society or community of human beings depends largely on who controls the affairs of that group.A leader without a clear vision and setting objectives simply drags the group being led into turmoil,while a good leadership paves the way to upward movement of a group of human beings under such a leadership.Searching for a model of good leadership becomes then a serious need in any human society since success is desired by everybody.This study has therefore searched for a recommendable or model of good leadership in the light of Exodus 18:12-27 and African culture.The biblical text was studied as a narrative peace dealing with the change of leadership style by Moses,the ancient leader of the Israelites.He changed from the sole-actor style of leadership to a collaborative and democratic type due to the good advice given to him by Jethro,his father-in-law.This type,in which there was decentralisation of leadership authority,was found to be beneficial to all involved,because the work of the leader(Moses)was made lighter and the led got quicker services.African concepts of leadership were also studied,and it was found out that the African/Igbo democratic style is highly recommendable because it is caring;it has good“listening ears”and excludes dictatorship,without degenerating to the laissez-faire type of leadership.Of the various types of leadership styles examined,the democratic,collaborative type ranks first as recommendable.The Jesus-model of leadership as entailing love and service rather than exploitation,as well as the transparency model of leadership offered by St.Paul in the NT,present themselves as models of good leadership.A good leader serves the interest of the group under his/her charge and not his or her selfish and nepotistic interest.展开更多
The logistic regression model has been become commonly used to study the association between a binary response variable;it is widespread application rests on its easy application and interpretation. The subject of ass...The logistic regression model has been become commonly used to study the association between a binary response variable;it is widespread application rests on its easy application and interpretation. The subject of assessment of goodness-of-fit in logistic regression model has attracted the attention of many scientists and researchers. Goodness-of-fit tests are methods to determine the suitability of the fitted model. Many of methods proposed and discussed for assessing goodness-of fit in logistic regression model, however, the asymptotic distribution of goodness-of-fit statistics are less examine, it is need more investigated. This work, will focus on assessing the behavior of asymptotic distribution of goodness-of-fit tests, also make comparison between global goodness-of-fit tests, and evaluate it by simulation.展开更多
通过对空中交通阻抗基本要素的解析,参考道路交通BPR(Bureau of Public Road)阻抗函数,提出一种综合考虑起飞机场和降落机场跑道饱和度的空中交通阻抗函数模型以研究空中交通阻抗问题,为空中交通阻抗分析提供新的研究思路。采用南京禄...通过对空中交通阻抗基本要素的解析,参考道路交通BPR(Bureau of Public Road)阻抗函数,提出一种综合考虑起飞机场和降落机场跑道饱和度的空中交通阻抗函数模型以研究空中交通阻抗问题,为空中交通阻抗分析提供新的研究思路。采用南京禄口机场-北京首都机场的航班数据进行拟合分析,对模型参数进行标定。根据有无流量控制分别给出了仅考虑降落机场跑道饱和度模型的拟合结果并进行了参数检验,同时进一步与综合考虑起降机场跑道饱和度模型的拟合优度指标进行对比分析。结果显示:综合模型在无流控情况下精度提升了11.9%,有流控情况下精度提升了16.7%,可以为空中交通管理提供参考。展开更多
文摘Data sparseness has been an inherited issue of statistical language models and smoothing method is usually used to resolve the zero count problems. In this paper, we studied empirically and analyzed the well-known smoothing methods of Good-Turing and advanced Good-Turing for language models on large sizes Chinese corpus. In the paper, ten models are generated sequentially on various size of corpus, from 30 M to 300 M Chinese words of CGW corpus. In our experiments, the smoothing methods;Good-Turing and Advanced Good-Turing smoothing are evaluated on inside testing and outside testing. Based on experiments results, we analyzed further the trends of perplexity of smoothing methods, which are useful for employing the effective smoothing methods to alleviate the issue of data sparseness on various sizes of language models. Finally, some helpful observations are described in detail.
文摘It is an undeniable fact that the success or the failure of any given society or community of human beings depends largely on who controls the affairs of that group.A leader without a clear vision and setting objectives simply drags the group being led into turmoil,while a good leadership paves the way to upward movement of a group of human beings under such a leadership.Searching for a model of good leadership becomes then a serious need in any human society since success is desired by everybody.This study has therefore searched for a recommendable or model of good leadership in the light of Exodus 18:12-27 and African culture.The biblical text was studied as a narrative peace dealing with the change of leadership style by Moses,the ancient leader of the Israelites.He changed from the sole-actor style of leadership to a collaborative and democratic type due to the good advice given to him by Jethro,his father-in-law.This type,in which there was decentralisation of leadership authority,was found to be beneficial to all involved,because the work of the leader(Moses)was made lighter and the led got quicker services.African concepts of leadership were also studied,and it was found out that the African/Igbo democratic style is highly recommendable because it is caring;it has good“listening ears”and excludes dictatorship,without degenerating to the laissez-faire type of leadership.Of the various types of leadership styles examined,the democratic,collaborative type ranks first as recommendable.The Jesus-model of leadership as entailing love and service rather than exploitation,as well as the transparency model of leadership offered by St.Paul in the NT,present themselves as models of good leadership.A good leader serves the interest of the group under his/her charge and not his or her selfish and nepotistic interest.
文摘The logistic regression model has been become commonly used to study the association between a binary response variable;it is widespread application rests on its easy application and interpretation. The subject of assessment of goodness-of-fit in logistic regression model has attracted the attention of many scientists and researchers. Goodness-of-fit tests are methods to determine the suitability of the fitted model. Many of methods proposed and discussed for assessing goodness-of fit in logistic regression model, however, the asymptotic distribution of goodness-of-fit statistics are less examine, it is need more investigated. This work, will focus on assessing the behavior of asymptotic distribution of goodness-of-fit tests, also make comparison between global goodness-of-fit tests, and evaluate it by simulation.
文摘通过对空中交通阻抗基本要素的解析,参考道路交通BPR(Bureau of Public Road)阻抗函数,提出一种综合考虑起飞机场和降落机场跑道饱和度的空中交通阻抗函数模型以研究空中交通阻抗问题,为空中交通阻抗分析提供新的研究思路。采用南京禄口机场-北京首都机场的航班数据进行拟合分析,对模型参数进行标定。根据有无流量控制分别给出了仅考虑降落机场跑道饱和度模型的拟合结果并进行了参数检验,同时进一步与综合考虑起降机场跑道饱和度模型的拟合优度指标进行对比分析。结果显示:综合模型在无流控情况下精度提升了11.9%,有流控情况下精度提升了16.7%,可以为空中交通管理提供参考。
