The whole world knows that England has her Mary Wollstonecraft and France has her Simone de Beauvoir as feminists, but the world knows a very little that Bengal also has her Rokeya Shakhawat Hossain, an intrepid femin...The whole world knows that England has her Mary Wollstonecraft and France has her Simone de Beauvoir as feminists, but the world knows a very little that Bengal also has her Rokeya Shakhawat Hossain, an intrepid feminist, who struggled till the last day of her life for the perfectly right assessment of the neglected Indian women, was born in 1880, in Pairaband, a small village in British India which now lies in the north-western part of present-day Bangladesh. She pioneered women＇s advancement and led the way to enlightening and empowering women breaking all the traditional social barriers. When the whole women folk were utterly distressed, deprived, and drowned under the dirt of illiteracy, fanaticism, superstitions, and prejudices and could not think of equal rights and freedom, she raised her voice through her writings and worked to uplift the fortune of women, instilled a sense of renaissance in them and led them to tasting the flavor of freedom opposed to the current of patriarchal social views. Based on this bold attitude toward female emancipation, Rokeya can easily be acclaimed as a feminist whereas some critics have viewed her as a Muslim or Islamic feminist which is nothing but an immature attempt to underestimate her genius. It was true that she was brought up in an Islamic cultural milieu and tried to educate the then lagged behind Muslim girls which, the critics probably cogitated as the main aim of her life overlooking the universality of women＇s problems she dealt with and her non-sectarian outlook of life. In fact, she sprang up beyond the limitations the society placed upon her and was boldly vocal about the freedom of women irrespective of their distinctive faiths and social customs. This paper, therefore, aims at exploring Rokeya＇s Istrijatir Abanati （Woman＇s Downfall） （1903） with a view to showing her firm determination, endeavors, and voice to emancipate women, and advocating her as a concerned feminist.展开更多
A dynamic model is established for an offset-disc rotor system with a mechanical gear coupling, which takes into consideration the nonlinear restoring force of rotor support and the effect of coupling misalignment. Pe...A dynamic model is established for an offset-disc rotor system with a mechanical gear coupling, which takes into consideration the nonlinear restoring force of rotor support and the effect of coupling misalignment. Periodic solutions are obtained through harmonic balance method with alternating frequency/time domain(HB-AFT) technique, and then compared with the results of numerical simulation. Good agreement confirms the feasibility of HB-AFT scheme. Moreover, the Floquet theory is adopted to analyze motion stability of the system when rotor runs at different speed intervals. A simple strategy to determine the monodromy matrix is introduced and two ways towards unstability are found for periodic solutions: the period doubling bifurcation and the secondary Hopf bifurcation. The results obtained will contribute to the global response analysis and dynamic optimal design of rotor systems.展开更多
Control of supersonic flow fields with shock wave is important for some industrial fields. There are many studies for control of the supersonic flow fields using active or passive control. When non-equilibrium condens...Control of supersonic flow fields with shock wave is important for some industrial fields. There are many studies for control of the supersonic flow fields using active or passive control. When non-equilibrium condensation occurs in a supersonic flow field, the flow is affected by latent heat released. Many studies for the condensation have been conducted and the characteristics have been almost clarified. Further, it was found that non-equilibrium condensation can control the flow field. In these studies, the condensation occurs across the passage of the flow field and it causes the total pressure loss in the flow field. However, local occurrence of non-equilibrium condensation in the flow field may change the characteristics of total pressure loss compared with that by the condensation across the passage of the nozzle and there are few for researches of locally occurred non-equilibrium condensation in supersonic flow field. The purpose in the present study is to clarify the effect of local occurrence of non-equilibrium condensation on the transonic flow field in a nozzle with a circular bump. As a result, local occurrence of non-equilibrium condensation reduced the shock strength and total pressure loss in the transonic flow field by flowing the moist air from trailing edge of the circular bump to the mainstream.展开更多
文摘The whole world knows that England has her Mary Wollstonecraft and France has her Simone de Beauvoir as feminists, but the world knows a very little that Bengal also has her Rokeya Shakhawat Hossain, an intrepid feminist, who struggled till the last day of her life for the perfectly right assessment of the neglected Indian women, was born in 1880, in Pairaband, a small village in British India which now lies in the north-western part of present-day Bangladesh. She pioneered women＇s advancement and led the way to enlightening and empowering women breaking all the traditional social barriers. When the whole women folk were utterly distressed, deprived, and drowned under the dirt of illiteracy, fanaticism, superstitions, and prejudices and could not think of equal rights and freedom, she raised her voice through her writings and worked to uplift the fortune of women, instilled a sense of renaissance in them and led them to tasting the flavor of freedom opposed to the current of patriarchal social views. Based on this bold attitude toward female emancipation, Rokeya can easily be acclaimed as a feminist whereas some critics have viewed her as a Muslim or Islamic feminist which is nothing but an immature attempt to underestimate her genius. It was true that she was brought up in an Islamic cultural milieu and tried to educate the then lagged behind Muslim girls which, the critics probably cogitated as the main aim of her life overlooking the universality of women＇s problems she dealt with and her non-sectarian outlook of life. In fact, she sprang up beyond the limitations the society placed upon her and was boldly vocal about the freedom of women irrespective of their distinctive faiths and social customs. This paper, therefore, aims at exploring Rokeya＇s Istrijatir Abanati （Woman＇s Downfall） （1903） with a view to showing her firm determination, endeavors, and voice to emancipate women, and advocating her as a concerned feminist.
基金supported by the National Basic Research Program of China("973" Project)(Grant No.2015CB057400)the National Natural Science Foundation of China(Grant No.11302058)
文摘A dynamic model is established for an offset-disc rotor system with a mechanical gear coupling, which takes into consideration the nonlinear restoring force of rotor support and the effect of coupling misalignment. Periodic solutions are obtained through harmonic balance method with alternating frequency/time domain(HB-AFT) technique, and then compared with the results of numerical simulation. Good agreement confirms the feasibility of HB-AFT scheme. Moreover, the Floquet theory is adopted to analyze motion stability of the system when rotor runs at different speed intervals. A simple strategy to determine the monodromy matrix is introduced and two ways towards unstability are found for periodic solutions: the period doubling bifurcation and the secondary Hopf bifurcation. The results obtained will contribute to the global response analysis and dynamic optimal design of rotor systems.
文摘Control of supersonic flow fields with shock wave is important for some industrial fields. There are many studies for control of the supersonic flow fields using active or passive control. When non-equilibrium condensation occurs in a supersonic flow field, the flow is affected by latent heat released. Many studies for the condensation have been conducted and the characteristics have been almost clarified. Further, it was found that non-equilibrium condensation can control the flow field. In these studies, the condensation occurs across the passage of the flow field and it causes the total pressure loss in the flow field. However, local occurrence of non-equilibrium condensation in the flow field may change the characteristics of total pressure loss compared with that by the condensation across the passage of the nozzle and there are few for researches of locally occurred non-equilibrium condensation in supersonic flow field. The purpose in the present study is to clarify the effect of local occurrence of non-equilibrium condensation on the transonic flow field in a nozzle with a circular bump. As a result, local occurrence of non-equilibrium condensation reduced the shock strength and total pressure loss in the transonic flow field by flowing the moist air from trailing edge of the circular bump to the mainstream.
