The average variational principle was employed in this paper to study the evolution of large-scale and slowly varying Rossby wave packet with basic flow both in barotropic and baroclinic atmospheres. The evolution of ...The average variational principle was employed in this paper to study the evolution of large-scale and slowly varying Rossby wave packet with basic flow both in barotropic and baroclinic atmospheres. The evolution of the structure of Rossby wave packet with both time and space was studied. The results obtained in this paper are similar to the results of by WKBJ method. In addition, the dispersive process of the wave packet was analysed by taking Gaussian type wave packet as an initial disturbance. The valid time scale for application of wave packet theory in the atmosphere was obtained.展开更多
Objective To design a paramedian supracerebelalr infratentorial keyhole approach by applying the keyhole conception and explore its feasibility. The keyhole approach is imitated and microanatomical structures are obse...Objective To design a paramedian supracerebelalr infratentorial keyhole approach by applying the keyhole conception and explore its feasibility. The keyhole approach is imitated and microanatomical structures are observed,which could be reference of this approach in clinical use. Methods The paramedian展开更多
Global Software Development （GSD） is a well established field of software engineering with the benefits of a global environment. Software Project Management （SPM） plays a key role in the success of GSD. As a resul...Global Software Development （GSD） is a well established field of software engineering with the benefits of a global environment. Software Project Management （SPM） plays a key role in the success of GSD. As a result, the need has arisen to study and evaluate the downsides of SPM for GSD, to thereby pave the way for the development of new methods, techniques, and tools with which to tackle them. This paper aims to identify and classify research on SPM approaches for GSD that are available in the literature, to identify their current weaknesses and strengths, and to analyze their applications in industry. We performed a Systematic Mapping Study （SMS） based on six classification criteria. Eighty-four papers were selected and analyzed. The results indicate that interest in SPM for GSD has been increasing since 2006. As a class of approaches, the most frequently reported methods （40%） are those used for coordination, planning, and monitoring, along with estimation techniques that can be used to better match a distributed project. SPM for GSD requires further investigation by researchers and practitioners, particularly with respect to cost and time estimations. These findings will help overcome the challenges that must to be considered in future SPM research for GSD, especially regarding collaboration and time-zone differences.展开更多
Metastasis and recurrence of tumors is the chief cause of death for such patients. Therefore, researches on the mechanism of its metastasis, prevention and treatment are the focal points in the field of traditional Ch...Metastasis and recurrence of tumors is the chief cause of death for such patients. Therefore, researches on the mechanism of its metastasis, prevention and treatment are the focal points in the field of traditional Chinese medicine （TCM） and Western medicine （WM） at present. WM practitioners＂ study on tumor metastasis involved its occurrence and development including every detail and process, and now it even has developed into the molecular biological field. py is used as the main means, but the efficacy is not n treatment surgical operation and radio- chemotheratoo optimistic. In recent years, TOM, as part of the comprehensive therapy, has been gradually gaining attention of oncologists. Aimed at solving the difficult problems in metastasis of tumor, many TOM practitioners on the basis of syndrome differentiation have raised theories about the cause of tumor metastasis. On the basis of these theories, some TOM recipes against tumor metastasis have been developed to serve as an effective supplement to surgical operation, radio- and chemotherapy. The present article summarizes research results in recent years about the cause of formation of tumor and its metastasis by TOM and WM, so as to offer some theoretical clues to the study of tumors metastasis.展开更多
Increasing yield is one of the most important goals in crop breeding. Soybean （Glycine max L. Merr.）, one of the most economically important leguminous seed crops, provides the majority of plant proteins, and more t...Increasing yield is one of the most important goals in crop breeding. Soybean （Glycine max L. Merr.）, one of the most economically important leguminous seed crops, provides the majority of plant proteins, and more than a quarter of the world＇s food and animal feed （Graham and Vance, 2003）. The yield of soybean is finally determined by the number of seeds per unit area, which affected by many characters, such as height, branching number, photosynthesis, seed size, seed number. The number of seeds per pod is taken for one of the critical components that related to yield （You et al., 1995）.展开更多
Treatment of potassium bromodifluoroacetate(1)with alkyl halides in the presence of copper,iodide and potassium fluoride in DMF at 85—90℃ for 3—5h gavethe trifluoromethylated derivatives in moderate to high yields.
文摘The average variational principle was employed in this paper to study the evolution of large-scale and slowly varying Rossby wave packet with basic flow both in barotropic and baroclinic atmospheres. The evolution of the structure of Rossby wave packet with both time and space was studied. The results obtained in this paper are similar to the results of by WKBJ method. In addition, the dispersive process of the wave packet was analysed by taking Gaussian type wave packet as an initial disturbance. The valid time scale for application of wave packet theory in the atmosphere was obtained.
文摘Objective To design a paramedian supracerebelalr infratentorial keyhole approach by applying the keyhole conception and explore its feasibility. The keyhole approach is imitated and microanatomical structures are observed,which could be reference of this approach in clinical use. Methods The paramedian
基金the research project MPHR PPR1-09the Moroccan MESRSFC and CNRST for their supporta part of the GINSENC-UCLM(TIN2015-70259-C2-1-R)and GINSENG-UMU(TIN2015-70259-C2-2-R)projects,supported by the Spanish Ministry of Economy,Industry,and Competitiveness and European FEDER funds
文摘Global Software Development （GSD） is a well established field of software engineering with the benefits of a global environment. Software Project Management （SPM） plays a key role in the success of GSD. As a result, the need has arisen to study and evaluate the downsides of SPM for GSD, to thereby pave the way for the development of new methods, techniques, and tools with which to tackle them. This paper aims to identify and classify research on SPM approaches for GSD that are available in the literature, to identify their current weaknesses and strengths, and to analyze their applications in industry. We performed a Systematic Mapping Study （SMS） based on six classification criteria. Eighty-four papers were selected and analyzed. The results indicate that interest in SPM for GSD has been increasing since 2006. As a class of approaches, the most frequently reported methods （40%） are those used for coordination, planning, and monitoring, along with estimation techniques that can be used to better match a distributed project. SPM for GSD requires further investigation by researchers and practitioners, particularly with respect to cost and time estimations. These findings will help overcome the challenges that must to be considered in future SPM research for GSD, especially regarding collaboration and time-zone differences.
文摘Metastasis and recurrence of tumors is the chief cause of death for such patients. Therefore, researches on the mechanism of its metastasis, prevention and treatment are the focal points in the field of traditional Chinese medicine （TCM） and Western medicine （WM） at present. WM practitioners＂ study on tumor metastasis involved its occurrence and development including every detail and process, and now it even has developed into the molecular biological field. py is used as the main means, but the efficacy is not n treatment surgical operation and radio- chemotheratoo optimistic. In recent years, TOM, as part of the comprehensive therapy, has been gradually gaining attention of oncologists. Aimed at solving the difficult problems in metastasis of tumor, many TOM practitioners on the basis of syndrome differentiation have raised theories about the cause of tumor metastasis. On the basis of these theories, some TOM recipes against tumor metastasis have been developed to serve as an effective supplement to surgical operation, radio- and chemotherapy. The present article summarizes research results in recent years about the cause of formation of tumor and its metastasis by TOM and WM, so as to offer some theoretical clues to the study of tumors metastasis.
基金supported by the National Natural Science Foundation of China(Grant Nos.31271297 and 31222042) "One-hundred talents" Startup Funds from Chinese Academy of SciencesNational Key Basic Research Program(No. 2009CB 118402)
文摘Increasing yield is one of the most important goals in crop breeding. Soybean （Glycine max L. Merr.）, one of the most economically important leguminous seed crops, provides the majority of plant proteins, and more than a quarter of the world＇s food and animal feed （Graham and Vance, 2003）. The yield of soybean is finally determined by the number of seeds per unit area, which affected by many characters, such as height, branching number, photosynthesis, seed size, seed number. The number of seeds per pod is taken for one of the critical components that related to yield （You et al., 1995）.
基金Project supported by the National Natural Science Foundation of China.
文摘Treatment of potassium bromodifluoroacetate(1)with alkyl halides in the presence of copper,iodide and potassium fluoride in DMF at 85—90℃ for 3—5h gavethe trifluoromethylated derivatives in moderate to high yields.
