This paper analyzes the effect of waveform parame- ters on the joint target location and velocity estimation by a non- coherent multiple input multiple output （MIMO） radar transmitting multiple subcarriers signals. ...This paper analyzes the effect of waveform parame- ters on the joint target location and velocity estimation by a non- coherent multiple input multiple output （MIMO） radar transmitting multiple subcarriers signals. How the number of subcarriers in- fluences the estimation accuracy is illustrated by considering the joint Cramer-Rao bound and the mean square error of the maxi- mum likelihood estimate. The non-coherent MIMO radar ambiguity function with multiple subcarriers is developed and investigated by changing the number of subcarriers, the pulse width and the frequency spacing between adjacent subcarriers. The numerical results show that more subcarriers mean more accurate estimates, higher localization resolution, and larger pulse width results in a worse performance of target location estimation, while the fre- quency spacing affects target location estimation little.展开更多
Objective To probe into the pathogenic mechanisms of paraneoplastic limbic encephali- tis( PL E) in patients with small cell lung carcinoma( SCLC) .Methods The indirect im- munoperoxidase method and Western blotanalys...Objective To probe into the pathogenic mechanisms of paraneoplastic limbic encephali- tis( PL E) in patients with small cell lung carcinoma( SCLC) .Methods The indirect im- munoperoxidase method and Western blotanalysis were used for detecting anti- Hu antibodies in1 6 PLE patients associated with SCL C.Autopsy and pathological study were performed on two cases.Results Eight patients( 5 0 % ) had anti- Hu antibodies( anti- Hu+) whereas eight patients ( 5 0 % ) no detectable antineuronal antibodies ( anti- Hu- ) .The clinical and laboratory features of PLE and time to diagnosis of SCLC were similar in the anti- Hu+and anti- Hu- groups.Involvement of other areas of the nervous system in seven( 87.5 % ) patients of the anti- Hu+group but in only one ( 1 2 .5 ) % of the anti- Hu- group ( P=0 .0 1 2 ) . Conclusions The presence of this characteristic neurological disorder strongly suggested that with an ac- companying SCLC,existence of anti- Hu autoantibody was in favour of an autoimmune mech- anism participating in PLE.展开更多
基金supported by the National Natural Science Foundation of China (60972152 61001153)the Aeronautics Science Foundation of China (2009ZC53031)
文摘This paper analyzes the effect of waveform parame- ters on the joint target location and velocity estimation by a non- coherent multiple input multiple output （MIMO） radar transmitting multiple subcarriers signals. How the number of subcarriers in- fluences the estimation accuracy is illustrated by considering the joint Cramer-Rao bound and the mean square error of the maxi- mum likelihood estimate. The non-coherent MIMO radar ambiguity function with multiple subcarriers is developed and investigated by changing the number of subcarriers, the pulse width and the frequency spacing between adjacent subcarriers. The numerical results show that more subcarriers mean more accurate estimates, higher localization resolution, and larger pulse width results in a worse performance of target location estimation, while the fre- quency spacing affects target location estimation little.
文摘Objective To probe into the pathogenic mechanisms of paraneoplastic limbic encephali- tis( PL E) in patients with small cell lung carcinoma( SCLC) .Methods The indirect im- munoperoxidase method and Western blotanalysis were used for detecting anti- Hu antibodies in1 6 PLE patients associated with SCL C.Autopsy and pathological study were performed on two cases.Results Eight patients( 5 0 % ) had anti- Hu antibodies( anti- Hu+) whereas eight patients ( 5 0 % ) no detectable antineuronal antibodies ( anti- Hu- ) .The clinical and laboratory features of PLE and time to diagnosis of SCLC were similar in the anti- Hu+and anti- Hu- groups.Involvement of other areas of the nervous system in seven( 87.5 % ) patients of the anti- Hu+group but in only one ( 1 2 .5 ) % of the anti- Hu- group ( P=0 .0 1 2 ) . Conclusions The presence of this characteristic neurological disorder strongly suggested that with an ac- companying SCLC,existence of anti- Hu autoantibody was in favour of an autoimmune mech- anism participating in PLE.
