Based on the experiment of onset of nucleate boiling(ONB)in natural circulation and the nonequilibrium thermodynamics dissipative theory,the mechanism of ONB in narrow rectangle channels of natural circulation is prop...Based on the experiment of onset of nucleate boiling(ONB)in natural circulation and the nonequilibrium thermodynamics dissipative theory,the mechanism of ONB in narrow rectangle channels of natural circulation is proposed.It points out that the onset of nucleate boiling is influenced by the degree of superheat and the special conditions of narrow channels.Under the conditions of both density difference in natural circulation and narrow rectangle channels,the prediction model of ONB in natural circulation of narrow channels based on fluctuating is established.The experimental results show that the present model can be used to predict the heat flux of ONB in narrow rectangle channels.Features of ONB in natural circulation narrow rectangle channels are as follows:heating power is the incentive of the happen of ONB;the higher the heating power is,the higher the degree of superheat is,and the earlier the ONB will appear.With the pressurizing,the appearance of ONB will be delayed.The higher the degree of supercooling is,the later the ONB appears.The ONB will happen easier when there are noncondensable gases and roughness in the channels.展开更多
Assume that D is a nuclear space and D' its strong topological dual space. Let {B_t}t∈(0,∞) be a Wiener D'-process. In this paper, the real-valued and D'-valued weak stochastic integral with respect to {...Assume that D is a nuclear space and D' its strong topological dual space. Let {B_t}t∈(0,∞) be a Wiener D'-process. In this paper, the real-valued and D'-valued weak stochastic integral with respect to {B_t} are established.AMS Subject Classification. 60H05.展开更多
In this paper, the multiple stochastic integral with respect to a Wiener D'-process is defined. And also it is shown that for a D'-valued nonlinear random functional there exists a sequence of multiple integra...In this paper, the multiple stochastic integral with respect to a Wiener D'-process is defined. And also it is shown that for a D'-valued nonlinear random functional there exists a sequence of multiple integral kernels such that the nonlinear functional can be expanded by series of multiple Wiener integrals of the integral kernels with respect to the Wiener D'-process.展开更多
Objective:We studied the clinicopathological and immunohistochemical features of olfactory neuroblastoma(ONB).Methods:The clinic pathological data and immunohistochemical features of 15 cases with ONB were analyzed re...Objective:We studied the clinicopathological and immunohistochemical features of olfactory neuroblastoma(ONB).Methods:The clinic pathological data and immunohistochemical features of 15 cases with ONB were analyzed retrospectively,and the related literatures were reviewed.Results:The tumors were all located in the nasal cavity in 15 cases.According to Kadish's staging system,7 cases were in stage A,5 cases in stage B,and 3 cases in stage C.The morphological features showed small round or ovoid tumor cells divided into pieces or trabeculae by connective tissues which were rich in capillaries.The tumor cells had round or oval nuclei and fine chromatins and lack of cytoplasma.Flexner rosette and Homer-Wright rosette were found in some cases.Acidophilic fibrins were composed of cytoplasmic projection among tumor cells.All cases were positive for NSE,Syn,CgA,1 case was positive for Vimentin,2 cases were positive for S-100,while CKpan,LCA and HMB45 were all negative.Conclusion:ONB is a type of very rare malignant tumors,which could be diagnosed by pathology,and immunohistochemistry is helpful in the diagnosis and differential diagnosis.展开更多
基金Supported by National Natural Science Foundation of China(No.50976033)National Key Laboratory of Bubble Physics and Natural Circulation(No.9140C7 101030905)North China Electric Power University’s 211 Project
文摘Based on the experiment of onset of nucleate boiling(ONB)in natural circulation and the nonequilibrium thermodynamics dissipative theory,the mechanism of ONB in narrow rectangle channels of natural circulation is proposed.It points out that the onset of nucleate boiling is influenced by the degree of superheat and the special conditions of narrow channels.Under the conditions of both density difference in natural circulation and narrow rectangle channels,the prediction model of ONB in natural circulation of narrow channels based on fluctuating is established.The experimental results show that the present model can be used to predict the heat flux of ONB in narrow rectangle channels.Features of ONB in natural circulation narrow rectangle channels are as follows:heating power is the incentive of the happen of ONB;the higher the heating power is,the higher the degree of superheat is,and the earlier the ONB will appear.With the pressurizing,the appearance of ONB will be delayed.The higher the degree of supercooling is,the later the ONB appears.The ONB will happen easier when there are noncondensable gases and roughness in the channels.
文摘Assume that D is a nuclear space and D' its strong topological dual space. Let {B_t}t∈(0,∞) be a Wiener D'-process. In this paper, the real-valued and D'-valued weak stochastic integral with respect to {B_t} are established.AMS Subject Classification. 60H05.
文摘In this paper, the multiple stochastic integral with respect to a Wiener D'-process is defined. And also it is shown that for a D'-valued nonlinear random functional there exists a sequence of multiple integral kernels such that the nonlinear functional can be expanded by series of multiple Wiener integrals of the integral kernels with respect to the Wiener D'-process.
文摘Objective:We studied the clinicopathological and immunohistochemical features of olfactory neuroblastoma(ONB).Methods:The clinic pathological data and immunohistochemical features of 15 cases with ONB were analyzed retrospectively,and the related literatures were reviewed.Results:The tumors were all located in the nasal cavity in 15 cases.According to Kadish's staging system,7 cases were in stage A,5 cases in stage B,and 3 cases in stage C.The morphological features showed small round or ovoid tumor cells divided into pieces or trabeculae by connective tissues which were rich in capillaries.The tumor cells had round or oval nuclei and fine chromatins and lack of cytoplasma.Flexner rosette and Homer-Wright rosette were found in some cases.Acidophilic fibrins were composed of cytoplasmic projection among tumor cells.All cases were positive for NSE,Syn,CgA,1 case was positive for Vimentin,2 cases were positive for S-100,while CKpan,LCA and HMB45 were all negative.Conclusion:ONB is a type of very rare malignant tumors,which could be diagnosed by pathology,and immunohistochemistry is helpful in the diagnosis and differential diagnosis.
