阐述项目学习法的内涵和重要作用。以译林版初中《英语》8B Unit 8 A Green World为例,探究项目学习法的具体应用策略,即运用情境导入,明确项目主题;小组分工协作,自主选定具体项目;深入探讨问题,科学、合理分工;广泛搜集资料,协作完成...阐述项目学习法的内涵和重要作用。以译林版初中《英语》8B Unit 8 A Green World为例,探究项目学习法的具体应用策略,即运用情境导入,明确项目主题;小组分工协作,自主选定具体项目;深入探讨问题,科学、合理分工;广泛搜集资料,协作完成探究;制作项目报告,集中展示成果;坚持正向反馈,增强学生信心。提出将项目学习法应用于英语教学的针对性建议,以供参考。展开更多
The carbonaceous-siliceous-argillitic rock type uranium deposit in the Zoige area is located in the northeastern margin of the Tibetan Plateau, and has gained much attention of many geologists and ore deposit experts ...The carbonaceous-siliceous-argillitic rock type uranium deposit in the Zoige area is located in the northeastern margin of the Tibetan Plateau, and has gained much attention of many geologists and ore deposit experts due to its scale, high grade and abundant associated ores. Because of the insufficient reliable dating of intrusive rocks, the relationship between mineralization and the magmatic activities is still unknown. In order to study this key scientific issue and the ore-forming processes of the Zoige uranium ore field, the LA-ICP-MS zircon U-Pb dating of magmatic rocks was obtained：64.08±0.59 Ma for the granite-prophyry and ~200 Ma for the dolerite. U-Pb dating results of uraninite from the Zoige uranium ore field are mainly concentrated on ~90 Ma and ~60 Ma. According to LA-ICP-MS U-Pb zircon dating, the ages for the dolerite, porphyry granite and granodiorite are 200 Ma, 64.08 Ma approximately and 226.5-200.88 Ma, respectively. This indicates that the mineralization has close relationship with activities of the intermediate-acidic magma. The ages of the granite porphyry are consistent with those uraninite U-Pb dating results achieved by previous studies, which reflects the magmatic and ore-forming event during the later Yanshanian. Based on the data from previous researches, the ore bodies in the Zoige uranium ore field can be divided into two categories：the single uranium type and the uranium with polymetal mineralization type. The former formed at late Cretaceous（about 90 Ma）, while the latter, closely related to the granite porphyry, formed at early Paleogene（about 60 Ma）. And apart from ore forming elemental uranium, the latter is often associated with polymetallic elements, such as molybdenum, nickel, zinc, etc.展开更多
An preliminary design tool -LLTCA (lubrication and loaded tooth contact analysis) for spiral bevel and hypoid gears is presented, which combines the thermal -EH L analysis with LTCA. The LTCA is used to predict the co...An preliminary design tool -LLTCA (lubrication and loaded tooth contact analysis) for spiral bevel and hypoid gears is presented, which combines the thermal -EH L analysis with LTCA. The LTCA is used to predict the contact behavior, the geometry of tooth surfaces, normal load, and kinematics for thenmal-EHL analysis between the mating surfaces. From the results of thermal-EHL the designer can predict the lubrication performance which usually include the oil film forming ability, film pressure and the increment of temperature. In the LLTCA model the con- tact behavior, lubrication performance, running condition and tooth geometry which is the resultant of manufacturing parameters are all considered.展开更多
ms paper proposes a set of objective and quantitative human motion evaluation indices, among Which the index of difficulty and index of performance are introduced as the general indices for the quality measure of 2-D ...ms paper proposes a set of objective and quantitative human motion evaluation indices, among Which the index of difficulty and index of performance are introduced as the general indices for the quality measure of 2-D target-to-talget movement. As an example, the target-reaching movement of index finger, which is a basic functional action of index finger in the daily life of hUman beings, were experimentally investigated. In the experiment five healthy male subjects were asked to perform three target-reaching movement tasks Which have different indices of difficulty. All movements were recorded by a 3-D motion analysis system. Later, their motion qualities were measured with these evaluation metrics. The results showed that these indices are reasonable and have potential applications to biomedical engineering.展开更多
<Abstract> This paper is the manuscript of a keynote lecture Presented at the 7th International Symposium on Biomedical & Rehabilitation Engineering held in Harbin,China in July 1997. In this paper,the autho...<Abstract> This paper is the manuscript of a keynote lecture Presented at the 7th International Symposium on Biomedical & Rehabilitation Engineering held in Harbin,China in July 1997. In this paper,the authors gave a brief historic review of rehabilitation engineering research in China first, and then discussed the present status. Through these discussions both the road blocks and new challenges can beseen clearly.Finally,some suggestions to promote rehabilitation engineering research in China and personal views on basic research for the development of rehabilitation engineering were presented.展开更多
文摘阐述项目学习法的内涵和重要作用。以译林版初中《英语》8B Unit 8 A Green World为例,探究项目学习法的具体应用策略,即运用情境导入,明确项目主题;小组分工协作,自主选定具体项目;深入探讨问题,科学、合理分工;广泛搜集资料,协作完成探究;制作项目报告,集中展示成果;坚持正向反馈,增强学生信心。提出将项目学习法应用于英语教学的针对性建议,以供参考。
基金supported financially by the National Natural Scientific Foundation of China (Grants No. 40872069 and 41173059)the National Basic Research Program of China (973 Program) (Grants No. 2015CB453000)+1 种基金China Geological Survey (Grants No. 12120113095500)the Foundation of China Nuclear Geology (Grants No. 201148)
文摘The carbonaceous-siliceous-argillitic rock type uranium deposit in the Zoige area is located in the northeastern margin of the Tibetan Plateau, and has gained much attention of many geologists and ore deposit experts due to its scale, high grade and abundant associated ores. Because of the insufficient reliable dating of intrusive rocks, the relationship between mineralization and the magmatic activities is still unknown. In order to study this key scientific issue and the ore-forming processes of the Zoige uranium ore field, the LA-ICP-MS zircon U-Pb dating of magmatic rocks was obtained：64.08±0.59 Ma for the granite-prophyry and ~200 Ma for the dolerite. U-Pb dating results of uraninite from the Zoige uranium ore field are mainly concentrated on ~90 Ma and ~60 Ma. According to LA-ICP-MS U-Pb zircon dating, the ages for the dolerite, porphyry granite and granodiorite are 200 Ma, 64.08 Ma approximately and 226.5-200.88 Ma, respectively. This indicates that the mineralization has close relationship with activities of the intermediate-acidic magma. The ages of the granite porphyry are consistent with those uraninite U-Pb dating results achieved by previous studies, which reflects the magmatic and ore-forming event during the later Yanshanian. Based on the data from previous researches, the ore bodies in the Zoige uranium ore field can be divided into two categories：the single uranium type and the uranium with polymetal mineralization type. The former formed at late Cretaceous（about 90 Ma）, while the latter, closely related to the granite porphyry, formed at early Paleogene（about 60 Ma）. And apart from ore forming elemental uranium, the latter is often associated with polymetallic elements, such as molybdenum, nickel, zinc, etc.
文摘An preliminary design tool -LLTCA (lubrication and loaded tooth contact analysis) for spiral bevel and hypoid gears is presented, which combines the thermal -EH L analysis with LTCA. The LTCA is used to predict the contact behavior, the geometry of tooth surfaces, normal load, and kinematics for thenmal-EHL analysis between the mating surfaces. From the results of thermal-EHL the designer can predict the lubrication performance which usually include the oil film forming ability, film pressure and the increment of temperature. In the LLTCA model the con- tact behavior, lubrication performance, running condition and tooth geometry which is the resultant of manufacturing parameters are all considered.
文摘ms paper proposes a set of objective and quantitative human motion evaluation indices, among Which the index of difficulty and index of performance are introduced as the general indices for the quality measure of 2-D target-to-talget movement. As an example, the target-reaching movement of index finger, which is a basic functional action of index finger in the daily life of hUman beings, were experimentally investigated. In the experiment five healthy male subjects were asked to perform three target-reaching movement tasks Which have different indices of difficulty. All movements were recorded by a 3-D motion analysis system. Later, their motion qualities were measured with these evaluation metrics. The results showed that these indices are reasonable and have potential applications to biomedical engineering.
文摘<Abstract> This paper is the manuscript of a keynote lecture Presented at the 7th International Symposium on Biomedical & Rehabilitation Engineering held in Harbin,China in July 1997. In this paper,the authors gave a brief historic review of rehabilitation engineering research in China first, and then discussed the present status. Through these discussions both the road blocks and new challenges can beseen clearly.Finally,some suggestions to promote rehabilitation engineering research in China and personal views on basic research for the development of rehabilitation engineering were presented.
