Terrain Aided Navigation(TAN)technology has become increasingly important due to its effectiveness in environments where Global Positioning System(GPS)is unavailable.In recent years,TAN systems have been extensively r...Terrain Aided Navigation(TAN)technology has become increasingly important due to its effectiveness in environments where Global Positioning System(GPS)is unavailable.In recent years,TAN systems have been extensively researched for both aerial and underwater navigation applications.However,many TAN systems that rely on recursive Unmanned Aerial Vehicle(UAV)position estimation methods,such as Extended Kalman Filters(EKF),often face challenges with divergence and instability,particularly in highly non-linear systems.To address these issues,this paper proposes and investigates a hybrid two-stage TAN positioning system for UAVs that utilizes Particle Filter.To enhance the system’s robustness against uncertainties caused by noise and to estimate additional system states,a Fuzzy Particle Filter(FPF)is employed in the first stage.This approach introduces a novel terrain composite feature that enables a fuzzy expert system to analyze terrain non-linearities and dynamically adjust the number of particles in real-time.This design allows the UAV to be efficiently localized in GPS-denied environments while also reducing the computational complexity of the particle filter in real-time applications.In the second stage,an Error State Kalman Filter(ESKF)is implemented to estimate the UAV’s altitude.The ESKF is chosen over the conventional EKF method because it is more suitable for non-linear systems.Simulation results demonstrate that the proposed fuzzy-based terrain composite method achieves high positional accuracy while reducing computational time and memory usage.展开更多
Hypertrophic scars(HS)are fibrotic proliferative diseases that develop after deep skin injuries caused by trauma,burns,and surgery.Traditional treatment methods include both surgical and nonsurgical therapies.Early in...Hypertrophic scars(HS)are fibrotic proliferative diseases that develop after deep skin injuries caused by trauma,burns,and surgery.Traditional treatment methods include both surgical and nonsurgical therapies.Early intervention and combination therapy tailored to the individual needs of the patients are crucial for achieving optimal results.Three-dimensional(3D)printing technology,a rapid prototyping technique,is increasingly being applied in the medical field.The customization and precise functionality of 3D printing technology are particularly important for the rehabilitation of HS.This review provides an overview of HS and the role of 3D printing technology in medical applications,analyses the application of 3D-printed rehabilitation aids for HS,and discusses the use of 3D printing technology to improve HS treatment outcomes,thereby providing clinical guidance for effective HS rehabilitation.展开更多
Modeling HIV/AIDS progression is critical for understanding disease dynamics and improving patient care. This study compares the Exponential and Weibull survival models, focusing on their ability to capture state-spec...Modeling HIV/AIDS progression is critical for understanding disease dynamics and improving patient care. This study compares the Exponential and Weibull survival models, focusing on their ability to capture state-specific failure rates in HIV/AIDS progression. While the Exponential model offers simplicity with a constant hazard rate, it often fails to accommodate the complexities of dynamic disease progression. In contrast, the Weibull model provides flexibility by allowing hazard rates to vary over time. Both models are evaluated within the frameworks of the Cox Proportional Hazards (Cox PH) and Accelerated Failure Time (AFT) models, incorporating critical covariates such as age, gender, CD4 count, and ART status. Statistical evaluation metrics, including Akaike Information Criterion (AIC), Bayesian Information Criterion (BIC), log-likelihood, and Pseudo-R2, were employed to assess model performance across diverse patient subgroups. Results indicate that the Weibull model consistently outperforms the Exponential model in dynamic scenarios, such as younger patients and those with co-infections, while maintaining robustness in stable contexts. This study highlights the trade-off between flexibility and simplicity in survival modeling, advocating for tailored model selection to balance interpretability and predictive accuracy. These findings provide valuable insights for optimizing HIV/AIDS management strategies and advancing survival analysis methodologies.展开更多
This article,empowered by ChatGPT and through retrieving relevant historical literature,explores how the translator Sun Yat-sen flexibly employed strategies like domestication and foreignization,as well as methods lik...This article,empowered by ChatGPT and through retrieving relevant historical literature,explores how the translator Sun Yat-sen flexibly employed strategies like domestication and foreignization,as well as methods like omission,addition,and modification in his translation of Ambulance Lectures:First Aid to the Injured.Additionally,the research highlights the use of ChatGPT as a tool to assist in the study.While ChatGPT is able to provide comprehensive knowledge quickly and proper translations,improvements are still needed in terms of image accuracy and citation generation.By providing specific context,probing for factual evidence,clarifying the reference objects,and narrowing the scope,prompts can be gradually refined for increasingly satisfactory outcomes.展开更多
目的分析人类免疫缺陷病毒(HIV)感染和获得性免疫缺陷综合征(AIDS)合并腹股沟疝患者病毒载量对手术效果、手术治疗时间的影响。方法选取2015年1月—2024年6月本院收治的HIV/AIDS合并腹股沟疝患者60例,根据患者病毒载量分为高病毒载量组...目的分析人类免疫缺陷病毒(HIV)感染和获得性免疫缺陷综合征(AIDS)合并腹股沟疝患者病毒载量对手术效果、手术治疗时间的影响。方法选取2015年1月—2024年6月本院收治的HIV/AIDS合并腹股沟疝患者60例,根据患者病毒载量分为高病毒载量组(病毒载量≥500 copies/mL,35例)和低病毒载量组(病毒载量<500 copies/mL,25例)。观察患者术后疝复发情况、手术切口愈合情况及术后疼痛程度,记录患者手术时间、术后住院时间,观察患者术后并发症发生率。结果两组疝复发率比较,差异无统计学意义(P>0.05);低病毒载量组手术切口愈合率明显高于高病毒载量组,术后24 h VAS评分明显低于高病毒载量组(P<0.05)。高病毒载量组患者手术时间、术后住院时间均长于低病毒载量组(P<0.05)。低病毒载量组患者术后并发症发生率低于高病毒载量组,但两组差异无统计学意义(P>0.05)。结论HIV/AIDS合并腹股沟疝患者的病毒载量对手术效果及手术治疗时间有一定影响,临床应根据患者病毒载量制定个体化的治疗方案。展开更多
文摘Terrain Aided Navigation(TAN)technology has become increasingly important due to its effectiveness in environments where Global Positioning System(GPS)is unavailable.In recent years,TAN systems have been extensively researched for both aerial and underwater navigation applications.However,many TAN systems that rely on recursive Unmanned Aerial Vehicle(UAV)position estimation methods,such as Extended Kalman Filters(EKF),often face challenges with divergence and instability,particularly in highly non-linear systems.To address these issues,this paper proposes and investigates a hybrid two-stage TAN positioning system for UAVs that utilizes Particle Filter.To enhance the system’s robustness against uncertainties caused by noise and to estimate additional system states,a Fuzzy Particle Filter(FPF)is employed in the first stage.This approach introduces a novel terrain composite feature that enables a fuzzy expert system to analyze terrain non-linearities and dynamically adjust the number of particles in real-time.This design allows the UAV to be efficiently localized in GPS-denied environments while also reducing the computational complexity of the particle filter in real-time applications.In the second stage,an Error State Kalman Filter(ESKF)is implemented to estimate the UAV’s altitude.The ESKF is chosen over the conventional EKF method because it is more suitable for non-linear systems.Simulation results demonstrate that the proposed fuzzy-based terrain composite method achieves high positional accuracy while reducing computational time and memory usage.
基金supported by the Cross-Disciplinary Research Fund Project of the Shanghai Ninth People’s Hospital of Shanghai Jiao Tong University School of Medicine(grant no.JYJC202236)the Shanghai Plastic Surgery Research Center of Shanghai Priority Research Center(grant no.2023ZZ02023)the Shanghai Healthcare System Key Supporting Disciplines Program(grant no.2023ZDFC0303).
文摘Hypertrophic scars(HS)are fibrotic proliferative diseases that develop after deep skin injuries caused by trauma,burns,and surgery.Traditional treatment methods include both surgical and nonsurgical therapies.Early intervention and combination therapy tailored to the individual needs of the patients are crucial for achieving optimal results.Three-dimensional(3D)printing technology,a rapid prototyping technique,is increasingly being applied in the medical field.The customization and precise functionality of 3D printing technology are particularly important for the rehabilitation of HS.This review provides an overview of HS and the role of 3D printing technology in medical applications,analyses the application of 3D-printed rehabilitation aids for HS,and discusses the use of 3D printing technology to improve HS treatment outcomes,thereby providing clinical guidance for effective HS rehabilitation.
文摘Modeling HIV/AIDS progression is critical for understanding disease dynamics and improving patient care. This study compares the Exponential and Weibull survival models, focusing on their ability to capture state-specific failure rates in HIV/AIDS progression. While the Exponential model offers simplicity with a constant hazard rate, it often fails to accommodate the complexities of dynamic disease progression. In contrast, the Weibull model provides flexibility by allowing hazard rates to vary over time. Both models are evaluated within the frameworks of the Cox Proportional Hazards (Cox PH) and Accelerated Failure Time (AFT) models, incorporating critical covariates such as age, gender, CD4 count, and ART status. Statistical evaluation metrics, including Akaike Information Criterion (AIC), Bayesian Information Criterion (BIC), log-likelihood, and Pseudo-R2, were employed to assess model performance across diverse patient subgroups. Results indicate that the Weibull model consistently outperforms the Exponential model in dynamic scenarios, such as younger patients and those with co-infections, while maintaining robustness in stable contexts. This study highlights the trade-off between flexibility and simplicity in survival modeling, advocating for tailored model selection to balance interpretability and predictive accuracy. These findings provide valuable insights for optimizing HIV/AIDS management strategies and advancing survival analysis methodologies.
基金Research on AI Empowered Bilingual Language Asset Management and English Language Teaching Reform(24JG29)Research on the Digital Empowerment in Business English Major Reform and Innovation in the Context of Language Services(National Higher Education Institutions 202412583HN)Chinese Academic Translation Project of“C-E Translation of The Transformation of Rural China”(21WSHB004)。
文摘This article,empowered by ChatGPT and through retrieving relevant historical literature,explores how the translator Sun Yat-sen flexibly employed strategies like domestication and foreignization,as well as methods like omission,addition,and modification in his translation of Ambulance Lectures:First Aid to the Injured.Additionally,the research highlights the use of ChatGPT as a tool to assist in the study.While ChatGPT is able to provide comprehensive knowledge quickly and proper translations,improvements are still needed in terms of image accuracy and citation generation.By providing specific context,probing for factual evidence,clarifying the reference objects,and narrowing the scope,prompts can be gradually refined for increasingly satisfactory outcomes.
文摘目的分析人类免疫缺陷病毒(HIV)感染和获得性免疫缺陷综合征(AIDS)合并腹股沟疝患者病毒载量对手术效果、手术治疗时间的影响。方法选取2015年1月—2024年6月本院收治的HIV/AIDS合并腹股沟疝患者60例,根据患者病毒载量分为高病毒载量组(病毒载量≥500 copies/mL,35例)和低病毒载量组(病毒载量<500 copies/mL,25例)。观察患者术后疝复发情况、手术切口愈合情况及术后疼痛程度,记录患者手术时间、术后住院时间,观察患者术后并发症发生率。结果两组疝复发率比较,差异无统计学意义(P>0.05);低病毒载量组手术切口愈合率明显高于高病毒载量组,术后24 h VAS评分明显低于高病毒载量组(P<0.05)。高病毒载量组患者手术时间、术后住院时间均长于低病毒载量组(P<0.05)。低病毒载量组患者术后并发症发生率低于高病毒载量组,但两组差异无统计学意义(P>0.05)。结论HIV/AIDS合并腹股沟疝患者的病毒载量对手术效果及手术治疗时间有一定影响,临床应根据患者病毒载量制定个体化的治疗方案。
