The authors have observed submicroscopically the transformation of spermatid and the sperm structure in the spermatogenesis process of Cyclma sinensis. The results show during the spermatid differentiation the nuclear...The authors have observed submicroscopically the transformation of spermatid and the sperm structure in the spermatogenesis process of Cyclma sinensis. The results show during the spermatid differentiation the nuclear morphology transforms from the elliptical into the cylindrical shape. The morphological transformation of the nuclear chromatin experiences from the small masses of fine granule aggregation to granular substructures with a granular diameter of 20 - 41 nm (containing a few masses), then to large coarsely granules with a diameter of 36. 8-52. 6 nm and at last to the homogenate with high electron density. The proacrosomal granules secreted by Golgi complex aggregate to form a large spherical granule which moves gradually to the anterior pole of the nucleus to join the acrosomal formation. The fusion of some mitochondria and the disintegration of a few ones result in the mitochondrial number decrease and volume enlargement. Finally, the mitochondrial ring which consists of five mitochondria and locates at the posterior pole of the nucleus, surrounds the proximal and distal cen-trioles to form the main structure of the middle section of sperm. The spermatozoon of Cyclma smensis is of the primitive type and consists of head, middle section and tail flagellum. In addition, it is of interest to note that a special spherical structure in the subacrosomal area is observed.展开更多
Smart meters in the Power Internet of Things generate a large amount of power data.However,data privacy in the process of calculation,storage,and transmission is an urgent problem to be solved.Therefore,in this paper ...Smart meters in the Power Internet of Things generate a large amount of power data.However,data privacy in the process of calculation,storage,and transmission is an urgent problem to be solved.Therefore,in this paper we propose a power resource dispatching framework(PRDF)with a privacy protection function,which uses a certificateless aggregate signcryption scheme based on cloud-fog cooperation.Using pseudonyms and aggregating users’power data,PRDF not only protects users’privacy,but also reduces the computing cost and communication overhead under traditional cloud computing.In addition,if the control center finds that a user has submitted abnormal data,it can send a request to the user management center to track the real identity of the user.Our scheme satisfies security requirements based on the random oracle model,including confidentiality and unforgeability.Furthermore,we compare our scheme with other certificateless aggregate signcryption schemes by simulations.Simulation results show that compared with traditional methods,our method performs better in terms of the computation cost.展开更多
基金This study is financed by the Fujian Natural Science Foundation C90045.
文摘The authors have observed submicroscopically the transformation of spermatid and the sperm structure in the spermatogenesis process of Cyclma sinensis. The results show during the spermatid differentiation the nuclear morphology transforms from the elliptical into the cylindrical shape. The morphological transformation of the nuclear chromatin experiences from the small masses of fine granule aggregation to granular substructures with a granular diameter of 20 - 41 nm (containing a few masses), then to large coarsely granules with a diameter of 36. 8-52. 6 nm and at last to the homogenate with high electron density. The proacrosomal granules secreted by Golgi complex aggregate to form a large spherical granule which moves gradually to the anterior pole of the nucleus to join the acrosomal formation. The fusion of some mitochondria and the disintegration of a few ones result in the mitochondrial number decrease and volume enlargement. Finally, the mitochondrial ring which consists of five mitochondria and locates at the posterior pole of the nucleus, surrounds the proximal and distal cen-trioles to form the main structure of the middle section of sperm. The spermatozoon of Cyclma smensis is of the primitive type and consists of head, middle section and tail flagellum. In addition, it is of interest to note that a special spherical structure in the subacrosomal area is observed.
基金Project supported by the National Natural Science Foundation of China(No.62102311)the Key Research and Development Program of Shaanxi,China(No.2021NY-211)。
文摘Smart meters in the Power Internet of Things generate a large amount of power data.However,data privacy in the process of calculation,storage,and transmission is an urgent problem to be solved.Therefore,in this paper we propose a power resource dispatching framework(PRDF)with a privacy protection function,which uses a certificateless aggregate signcryption scheme based on cloud-fog cooperation.Using pseudonyms and aggregating users’power data,PRDF not only protects users’privacy,but also reduces the computing cost and communication overhead under traditional cloud computing.In addition,if the control center finds that a user has submitted abnormal data,it can send a request to the user management center to track the real identity of the user.Our scheme satisfies security requirements based on the random oracle model,including confidentiality and unforgeability.Furthermore,we compare our scheme with other certificateless aggregate signcryption schemes by simulations.Simulation results show that compared with traditional methods,our method performs better in terms of the computation cost.
