This paper considers the problem of target and jamming recognition for the pulse Doppler radar fuze(PDRF).To solve the problem,the matched filter outputs of the PDRF under the action of target and jamming are analyzed...This paper considers the problem of target and jamming recognition for the pulse Doppler radar fuze(PDRF).To solve the problem,the matched filter outputs of the PDRF under the action of target and jamming are analyzed.Then,the frequency entropy and peak-to-peak ratio are extracted from the matched filter output of the PDRF,and the time-frequency joint feature is constructed.Based on the time-frequency joint feature,the naive Bayesian classifier(NBC)with minimal risk is established for target and jamming recognition.To improve the adaptability of the proposed method in complex environments,an online update process that adaptively modifies the classifier in the duration of the work of the PDRF is proposed.The experiments show that the PDRF can maintain high recognition accuracy when the signal-to-noise ratio(SNR)decreases and the jamming-to-signal ratio(JSR)increases.Moreover,the applicable analysis shows that he ONBCMR method has low computational complexity and can fully meet the real-time requirements of PDRF.展开更多
目的:评价肿瘤电场治疗仪用于治疗复发胶质母细胞瘤患者的初步安全性和有效性。方法:选取2020年4月至2020年8月期间中南大学湘雅医院和解放军总医院6例受试者,均为男性,中位年龄53(48~68)岁。入组复发胶质母细胞瘤受试者并收集临床资料...目的:评价肿瘤电场治疗仪用于治疗复发胶质母细胞瘤患者的初步安全性和有效性。方法:选取2020年4月至2020年8月期间中南大学湘雅医院和解放军总医院6例受试者,均为男性,中位年龄53(48~68)岁。入组复发胶质母细胞瘤受试者并收集临床资料,通过观察受试者治疗期间不良事件的发生率、肿瘤进展时间(time to progression,TTP)和总生存时间(overall survival,OS)评估治疗的安全性和有效性。结果:入组6例受试者中位随访时间10.9(8.4~22.7)个月,所有受试者发生肿瘤进展,5例随访至死亡,截至随访截止1例生存。中位肿瘤进展时间(median time to progression,m TTP)为4.7个月(95%CI:3.62~5.78),中位无进展生存时间(median progression-free survival,mPFS)为4.7个月(95%CI:3.62~5.78),中位总生存时间(median overall survival,mOS)为10.9个月(95%CI:8.86~12.94)。客观缓解率(CR+PR)33.3%;疾病控制率(SD+PR+CR)83.3%。治疗相关的不良事件主要为头皮皮疹,发生率为66.7%,经调整电极片黏贴位置、保持创口干燥、涂抹类固醇类软膏或抗生素软膏后均可有效缓解。结论:肿瘤电场治疗仪用于治疗复发胶质母细胞瘤的受试者在电场治疗过程中呈现良好的初步安全性和有效性。展开更多
基金supported by the National Natural Science Foundation of China(Grant No.61973037 and No.61673066).
文摘This paper considers the problem of target and jamming recognition for the pulse Doppler radar fuze(PDRF).To solve the problem,the matched filter outputs of the PDRF under the action of target and jamming are analyzed.Then,the frequency entropy and peak-to-peak ratio are extracted from the matched filter output of the PDRF,and the time-frequency joint feature is constructed.Based on the time-frequency joint feature,the naive Bayesian classifier(NBC)with minimal risk is established for target and jamming recognition.To improve the adaptability of the proposed method in complex environments,an online update process that adaptively modifies the classifier in the duration of the work of the PDRF is proposed.The experiments show that the PDRF can maintain high recognition accuracy when the signal-to-noise ratio(SNR)decreases and the jamming-to-signal ratio(JSR)increases.Moreover,the applicable analysis shows that he ONBCMR method has low computational complexity and can fully meet the real-time requirements of PDRF.
文摘目的:评价肿瘤电场治疗仪用于治疗复发胶质母细胞瘤患者的初步安全性和有效性。方法:选取2020年4月至2020年8月期间中南大学湘雅医院和解放军总医院6例受试者,均为男性,中位年龄53(48~68)岁。入组复发胶质母细胞瘤受试者并收集临床资料,通过观察受试者治疗期间不良事件的发生率、肿瘤进展时间(time to progression,TTP)和总生存时间(overall survival,OS)评估治疗的安全性和有效性。结果:入组6例受试者中位随访时间10.9(8.4~22.7)个月,所有受试者发生肿瘤进展,5例随访至死亡,截至随访截止1例生存。中位肿瘤进展时间(median time to progression,m TTP)为4.7个月(95%CI:3.62~5.78),中位无进展生存时间(median progression-free survival,mPFS)为4.7个月(95%CI:3.62~5.78),中位总生存时间(median overall survival,mOS)为10.9个月(95%CI:8.86~12.94)。客观缓解率(CR+PR)33.3%;疾病控制率(SD+PR+CR)83.3%。治疗相关的不良事件主要为头皮皮疹,发生率为66.7%,经调整电极片黏贴位置、保持创口干燥、涂抹类固醇类软膏或抗生素软膏后均可有效缓解。结论:肿瘤电场治疗仪用于治疗复发胶质母细胞瘤的受试者在电场治疗过程中呈现良好的初步安全性和有效性。
