A kind of silicified fossil wood with mixed pits on the radial tracheid wall is described. The fossil wood was collected from the top of Taiyuan Formation (early Early Permian) in Wuda Mi...A kind of silicified fossil wood with mixed pits on the radial tracheid wall is described. The fossil wood was collected from the top of Taiyuan Formation (early Early Permian) in Wuda Mining District, Nei Mongol. Compared with the Paleozoic fossil woods in the world, it is put into Araucarioxylon Kraus and named as A. laoshidanense sp. nov. Based on the character of possessing mixed pittings (alternate and opposite pittings) on the radial tracheid wall, the fossil wood is believed to be one of the unknown primitive conifers.Diagnosis of the new species: Only secondary xylem preserved and consisting of axial tracheids and rays. Growth ring boundary, resin duct and axial parenchyma absent. One to Four (commonly 2 or 3) seriates of bordered pits (mostly alternate but sometimes opposite) on the radial tracheid wall. One to Four (commonly 1, rarely 2 to 4) Cupressoid pits in each cross_field. Rays usually uniseriate, sometimes partly_ biseriate and 2 to 39 (mainly 3-5) cells high.展开更多
A phylogenetic hypothesis for the Asian newts of the Tylototriton asperrimus group was generated using data from two mitochondrial fragments including COI and the ND1-ND2 regions. Four distinct clades （A, B, C, D） w...A phylogenetic hypothesis for the Asian newts of the Tylototriton asperrimus group was generated using data from two mitochondrial fragments including COI and the ND1-ND2 regions. Four distinct clades （A, B, C, D） were resolved with high nodal support within this monophyletic group. Clade A included T. asperrimus, T. hainanensis, T. notialis, ＂T. vietnamensis＂, and two unnamed salamander populations from Vietnam. Clade A, constituted the sister group of clades B ＋ C. Newly identified clade C likely represents a new cryptic species. Clade C was the sister group of T. wenxianensis. The true 7： vietnamensis exclusively constituted clade D. Our results bring into question some previous taxonomic decisions, and a revision is required. This study illustrates the necessity to include samples from type localities in taxonomic studies, and highlights the importance of fine-grained geographical sampling.展开更多
In the past two decades, software aging has been studied by both academic and industry communities. Many scholars focused on analytical methods or time series to model software aging process. While machine learning ha...In the past two decades, software aging has been studied by both academic and industry communities. Many scholars focused on analytical methods or time series to model software aging process. While machine learning has been shown as a very promising technique in application to forecast software state: normal or aging. In this paper, we proposed a method which can give practice guide to forecast software aging using machine learning algorithm. Firstly, we collected data from a running commercial web server and preprocessed these data. Secondly, feature selection algorithm was applied to find a subset of model parameters set. Thirdly, time series model was used to predict values of selected parameters in advance. Fourthly, some machine learning algorithms were used to model software aging process and to predict software aging. Fifthly, we used sensitivity analysis to analyze how heavily outcomes changed following input variables change. In the last, we applied our method to an IIS web server. Through analysis of the experiment results, we find that our proposed method can predict software aging in the early stage of system development life cycle.展开更多
New country records for five species of Glenea Newman from the Oriental Region are reported. G. changchini Lin ＆ Lin, 2011 is newly recorded from Vietnam; G. rondoni Breuning, 1963 is new from Thailand; G. subregular...New country records for five species of Glenea Newman from the Oriental Region are reported. G. changchini Lin ＆ Lin, 2011 is newly recorded from Vietnam; G. rondoni Breuning, 1963 is new from Thailand; G. subregularis Pic, 1943 is new from Laos; G subviridescens Breuning, 1963 is new from China, Vietnam and Thailand; and G. viridescens Pic, 1927 is newly recorded from China and Laos. Photos of types and voucher specimens from new localities are presented.展开更多
The enriched characters of methane content in the main coal seam of Yunnan＇s Laochang coal mine was analyzed through combined with the geologic conditions of the research area： structure type, hydrogeology condition...The enriched characters of methane content in the main coal seam of Yunnan＇s Laochang coal mine was analyzed through combined with the geologic conditions of the research area： structure type, hydrogeology condition, coal reservoir＇s macerals, ash, water content, and so on. The geology factors of controlling gas in Laochang coal mine were illustrated; and the different geology models of controlling gas of geologic condition coupling were posed. Research shows that, in the region, the methane contents of the main coal seams decrease gradually from middle to all around it; the northeast and southeast is higher than the west. In the local area, the methane content of anticline axis is higher, and the gas content is reduced to both wings and plunging crown. On macroscopic view, the distribution of methane content in coal-beds was controlled by structural type. On microscopic view, the methane content in coal-beds is mainly involved in coal reservoir＇s macerals, ash content, and water content. The enriched characters of CBM in the research area are mainly the result of structure-hydrogeology-petrophysics coupling controls of CBM. On the basis of above analysis, according to the distribution character of methane content in coalbeds, the research area was divided into low gas area, middle gas area, and high gas area.展开更多
[Objective] The aim was to construct the internal motivation of flued-cured tobacco natural aging. [Method] The variation of DNA copies of Bacillus megaterium, amylase activity, PPO, peroxydase and content of starch, ...[Objective] The aim was to construct the internal motivation of flued-cured tobacco natural aging. [Method] The variation of DNA copies of Bacillus megaterium, amylase activity, PPO, peroxydase and content of starch, neutro-protein, polyphenol in different aging period were investigated using Henan flue-cured tobacco leaves. [Result] Results showed that the DNA copies of Bacillus megaterium increased initially but decreased subsequently with the aging time. The DNA copies of Bacillus per gram of tobacco leaf surface reached the maximum number at 6 months aging. The activities of four enzymes showed the same variation trend as in DNA copies, and also reached the highest level at 6 months aging. Chemical ingredients, however, displayed a downward trend. The variation of enzyme activity and content of chemical composition were reflected in the changes of DNA copies in Bacillus megaterium. [Conclusion] The result indicate that Bacillus megaterium was the internal motivation of flue-cured tobacco natural aging.展开更多
This paper puts a focus on the empowerment of the elderly people in modern society. The expected increasing of elder population is a reminder of more social responsibility for the younger generation who has to learn a...This paper puts a focus on the empowerment of the elderly people in modern society. The expected increasing of elder population is a reminder of more social responsibility for the younger generation who has to learn a lot from the experiences of elderly people for the society. While it is acknowledged the importance of addressing the increase of aging population issue in other countries, this paper focuses on selected three countries of Myanmar, Malaysia, and Vietnam as the fact that these three countries are economically rapidly developing, and highly expecting the possible aging population issues. This paper briefly highlights the importance of elderly people by discussing on a brief view on elderly population： a reminder of social responsibility of the young generation, understanding the elderly and their experiences of the life, community organizing for empowering the elderly people, the meaningful participation and elderly empowerment, and the implication for social work practice with the elderly.展开更多
China has entered the aging society, due to the imperfect national endowment insurance system, the traditional pension mode can no longer meet the needs of old people, so that the family pension and social pension are...China has entered the aging society, due to the imperfect national endowment insurance system, the traditional pension mode can no longer meet the needs of old people, so that the family pension and social pension are facing tremendous pressure. In this paper, firstly, explaining the concept of the housing endowment, and summarizing the feasibility and necessity of the housing endowment. Then through the investigation and the analysis of SPSS data, with the housing endowment in the United States and Singapore＇ success, summing up what our country should do to make improvements, and then we will induce the current situation and predicament of the housing endowment in Nanjing. Finally, we can put forward relevant countermeasures and suggestions by the feasibility to the reality to Nanjing city in the future.展开更多
文摘A kind of silicified fossil wood with mixed pits on the radial tracheid wall is described. The fossil wood was collected from the top of Taiyuan Formation (early Early Permian) in Wuda Mining District, Nei Mongol. Compared with the Paleozoic fossil woods in the world, it is put into Araucarioxylon Kraus and named as A. laoshidanense sp. nov. Based on the character of possessing mixed pittings (alternate and opposite pittings) on the radial tracheid wall, the fossil wood is believed to be one of the unknown primitive conifers.Diagnosis of the new species: Only secondary xylem preserved and consisting of axial tracheids and rays. Growth ring boundary, resin duct and axial parenchyma absent. One to Four (commonly 2 or 3) seriates of bordered pits (mostly alternate but sometimes opposite) on the radial tracheid wall. One to Four (commonly 1, rarely 2 to 4) Cupressoid pits in each cross_field. Rays usually uniseriate, sometimes partly_ biseriate and 2 to 39 (mainly 3-5) cells high.
基金supported by grants from the Ministry of Science and Technology of China(MOST Grant 2011FY120200)the National Natural Science Foundation of China(31090100,30870281)+1 种基金the Chinese Academy of Sciences(KSCX2-YW-Z-0807,KSCX2-EW-Z-2)the Bureau of Science and Technology of Yunnan province
文摘A phylogenetic hypothesis for the Asian newts of the Tylototriton asperrimus group was generated using data from two mitochondrial fragments including COI and the ND1-ND2 regions. Four distinct clades （A, B, C, D） were resolved with high nodal support within this monophyletic group. Clade A included T. asperrimus, T. hainanensis, T. notialis, ＂T. vietnamensis＂, and two unnamed salamander populations from Vietnam. Clade A, constituted the sister group of clades B ＋ C. Newly identified clade C likely represents a new cryptic species. Clade C was the sister group of T. wenxianensis. The true 7： vietnamensis exclusively constituted clade D. Our results bring into question some previous taxonomic decisions, and a revision is required. This study illustrates the necessity to include samples from type localities in taxonomic studies, and highlights the importance of fine-grained geographical sampling.
基金supported by the grants from Natural Science Foundation of China(Project No.61375045)the joint astronomic fund of the national natural science foundation of China and Chinese Academic Sinica(Project No.U1531242)Beijing Natural Science Foundation(4142030)
文摘In the past two decades, software aging has been studied by both academic and industry communities. Many scholars focused on analytical methods or time series to model software aging process. While machine learning has been shown as a very promising technique in application to forecast software state: normal or aging. In this paper, we proposed a method which can give practice guide to forecast software aging using machine learning algorithm. Firstly, we collected data from a running commercial web server and preprocessed these data. Secondly, feature selection algorithm was applied to find a subset of model parameters set. Thirdly, time series model was used to predict values of selected parameters in advance. Fourthly, some machine learning algorithms were used to model software aging process and to predict software aging. Fifthly, we used sensitivity analysis to analyze how heavily outcomes changed following input variables change. In the last, we applied our method to an IIS web server. Through analysis of the experiment results, we find that our proposed method can predict software aging in the early stage of system development life cycle.
基金supported by the National Natural Science Foundation of China(Nos.31000967&J0930004)a grant(No.O529YX5105)from the Key Laboratory of the Zoological Systematics and Evolution of the Chinese Academy of Sciences
文摘New country records for five species of Glenea Newman from the Oriental Region are reported. G. changchini Lin ＆ Lin, 2011 is newly recorded from Vietnam; G. rondoni Breuning, 1963 is new from Thailand; G. subregularis Pic, 1943 is new from Laos; G subviridescens Breuning, 1963 is new from China, Vietnam and Thailand; and G. viridescens Pic, 1927 is newly recorded from China and Laos. Photos of types and voucher specimens from new localities are presented.
基金Supported by the National Major Special Projects of Science and Technology of China （2011ZX05034） the National Basic Research Program of China （2009CB219605） the National Natural Science Foundation of China （41272178）
文摘The enriched characters of methane content in the main coal seam of Yunnan＇s Laochang coal mine was analyzed through combined with the geologic conditions of the research area： structure type, hydrogeology condition, coal reservoir＇s macerals, ash, water content, and so on. The geology factors of controlling gas in Laochang coal mine were illustrated; and the different geology models of controlling gas of geologic condition coupling were posed. Research shows that, in the region, the methane contents of the main coal seams decrease gradually from middle to all around it; the northeast and southeast is higher than the west. In the local area, the methane content of anticline axis is higher, and the gas content is reduced to both wings and plunging crown. On macroscopic view, the distribution of methane content in coal-beds was controlled by structural type. On microscopic view, the methane content in coal-beds is mainly involved in coal reservoir＇s macerals, ash content, and water content. The enriched characters of CBM in the research area are mainly the result of structure-hydrogeology-petrophysics coupling controls of CBM. On the basis of above analysis, according to the distribution character of methane content in coalbeds, the research area was divided into low gas area, middle gas area, and high gas area.
文摘[Objective] The aim was to construct the internal motivation of flued-cured tobacco natural aging. [Method] The variation of DNA copies of Bacillus megaterium, amylase activity, PPO, peroxydase and content of starch, neutro-protein, polyphenol in different aging period were investigated using Henan flue-cured tobacco leaves. [Result] Results showed that the DNA copies of Bacillus megaterium increased initially but decreased subsequently with the aging time. The DNA copies of Bacillus per gram of tobacco leaf surface reached the maximum number at 6 months aging. The activities of four enzymes showed the same variation trend as in DNA copies, and also reached the highest level at 6 months aging. Chemical ingredients, however, displayed a downward trend. The variation of enzyme activity and content of chemical composition were reflected in the changes of DNA copies in Bacillus megaterium. [Conclusion] The result indicate that Bacillus megaterium was the internal motivation of flue-cured tobacco natural aging.
文摘This paper puts a focus on the empowerment of the elderly people in modern society. The expected increasing of elder population is a reminder of more social responsibility for the younger generation who has to learn a lot from the experiences of elderly people for the society. While it is acknowledged the importance of addressing the increase of aging population issue in other countries, this paper focuses on selected three countries of Myanmar, Malaysia, and Vietnam as the fact that these three countries are economically rapidly developing, and highly expecting the possible aging population issues. This paper briefly highlights the importance of elderly people by discussing on a brief view on elderly population： a reminder of social responsibility of the young generation, understanding the elderly and their experiences of the life, community organizing for empowering the elderly people, the meaningful participation and elderly empowerment, and the implication for social work practice with the elderly.
文摘China has entered the aging society, due to the imperfect national endowment insurance system, the traditional pension mode can no longer meet the needs of old people, so that the family pension and social pension are facing tremendous pressure. In this paper, firstly, explaining the concept of the housing endowment, and summarizing the feasibility and necessity of the housing endowment. Then through the investigation and the analysis of SPSS data, with the housing endowment in the United States and Singapore＇ success, summing up what our country should do to make improvements, and then we will induce the current situation and predicament of the housing endowment in Nanjing. Finally, we can put forward relevant countermeasures and suggestions by the feasibility to the reality to Nanjing city in the future.
