Absolute distance measurement is a fundamental technique in mobile and large-scale dimensional metrology.Dual-comb ranging is emerging as a powerful tool that exploits phase resolution and frequency accuracy for high-...Absolute distance measurement is a fundamental technique in mobile and large-scale dimensional metrology.Dual-comb ranging is emerging as a powerful tool that exploits phase resolution and frequency accuracy for high-precision and fast-rate distance measurement.Using two coherent frequency combs,dual-comb ranging allows time and phase response to be measured rapidly.It breaks through the limitations related to the responsive bandwidth,ambiguity range,and dynamic measurement characteristics of conventional ranging tools.This review introduces dual-comb ranging and summarizes the key techniques for realizing this ranging tool.As optical frequency comb technology progresses,dualcomb ranging shows promise for various professional applications.展开更多
Background:Enhanced Recovery After Surgery(ERAS)is a multimodal approach for almost all types of surgical procedures,including liver transplantation(LTx).We developed an ERAS protocol for LTx based on previous experie...Background:Enhanced Recovery After Surgery(ERAS)is a multimodal approach for almost all types of surgical procedures,including liver transplantation(LTx).We developed an ERAS protocol for LTx based on previous experience and assessed it using benchmarks from the German Institute for Quality Management and Transparency in Healthcare(IQTIG).Methods:An ERAS protocol was developed and implemented in our center since 2018 for LTx,including preoperative,intraoperative,and postoperative procedures.From January 2021 to December 31st 2022,we conducted a prospective analysis including donor and recipient demographics,Model for End-Stage Liver Disease(MELD)score and medical history.Perioperative management,such as operative time,anhepatic phase time,intensive care unit(ICU)stay,morbidity and mortality as well as postoperative hospitalization,readmission and 1-year patient survival,were collected as outcome measures.Results:Sixty-eight consecutive liver transplant recipients were included.Mean age of the donors was 47(36-55.5)years old,type of donation was in 41 donation after brain death(DBD),26 donation after controlled circulatory death(DCD)and 1 donation after brain and cardiac death(DBCD).Mean age of the patients was 49.6 years(range,26-68 years),81%were male.The mean body mass index(BMI)of the recipients was 24 kg/m^(2)(range,15-37 kg/m^(2)),mean MELD score was 15(range,6-39),3 patients had a MELD score higher than 30.Fifty-three patients suffered from hepatitis B virus(HBV)related cirrhosis.Twenty-eight patients had hepatocellular carcinoma(HCC);5 patients were diagnosed with alcohol related cirrhosis and primary biliary cirrhosis,autoimmune disease and drug induced cirrhosis,undefined cirrhosis,respectively.The mean operation time in our cohort was 6.73 hours,and the average anhepatic phase time was 68 minutes.No patient had intraoperative hypothermia.Tracheal extubation was performed in the ICU department within 6 hours post operation and the average ICU/intermediate care(IMC)unit stay was 4.5 days(range,2-14 days).None of the patients required re-intubation.Postoperative complications with a CDC classification>II were seen in 16 patients(23.5%).Mean hospital stay was 21.7 days and readmission rate was 13(19%).Neither acute rejection nor postoperative mortality during the hospital stay was recorded.One patient died from acute myocardial infarction after discharge.Conclusions:We developed an ERAS protocol in LTx,consisting of preoperative,perioperative and postoperative management and assessed the quality using benchmarks from IQTIG.Our study revealed that the proposed ERAS approach in LTx is feasible offering the opportunities of enhanced recovery and quality management.展开更多
Radio frequency(RF)energy harvester as an efficient tool for capturing and converting the flourishing ambient RF energy provides a promising solution for long-term powering the wireless sensor networks and the Interne...Radio frequency(RF)energy harvester as an efficient tool for capturing and converting the flourishing ambient RF energy provides a promising solution for long-term powering the wireless sensor networks and the Internet of things(IoTs).However,the actual distribution of the environmental RF signals is dynamically frequency-dependent due to the diverse wireless terminals only interacting with specified frequencies.To take full advantage of the RF energy carrying this characteristic,an intelligent RF energy harvester is in demand to automatically sense the frequency information of an incident signal and conduct the corresponding RF-to-direct current transformation process.Here,to the best of my knowledge,a frequency-self-adaptive RF harvester is first presented with the help of the shape-reconfigurable liquid metal,which can precisely identify and efficiently convert an arbitrary signal from the frequency span of 1.8 to 2.6 GHz.Companied with a microcontroller unit and a tensile system,the dynamic functionality of the entire system is comprehensively demonstrated,showing promising potential to significantly advance various fields,including sustainable IoT applications,green wearable technologies,and self-powered devices.展开更多
Understanding the mode’s origin in planar metamaterials is fundamental for related applications in nanophotonics and plasmonics.For complex planar metamaterials,conventional analysis that directly obtains the final c...Understanding the mode’s origin in planar metamaterials is fundamental for related applications in nanophotonics and plasmonics.For complex planar metamaterials,conventional analysis that directly obtains the final charge/current distribution of a mode is usually difficult in helping to understand the mode’s origin.In this paper,we propose a mode evolution method(MEM)with a core analysis tool,i.e.,plasmonic evolution maps(PEMs),to describe the mode evolution in several complementary planar metamaterials with designed plasmonic atoms/molecules.The PEMs could not only clearly explain a mode’s origin,but also reveal the role of a structure’s symmetry in the mode formation process.The MEM with PEMs can work as a simple,efficient,and universal approach for the mode analysis in different kinds of planar metamaterials.展开更多
基金the National Natural Science Foundation of China(61575105,61611140125)Beijing Natural Science Foundation(3182011)Shenzhen Fundamental Research Funding(JCYJ20170412171535171).
文摘Absolute distance measurement is a fundamental technique in mobile and large-scale dimensional metrology.Dual-comb ranging is emerging as a powerful tool that exploits phase resolution and frequency accuracy for high-precision and fast-rate distance measurement.Using two coherent frequency combs,dual-comb ranging allows time and phase response to be measured rapidly.It breaks through the limitations related to the responsive bandwidth,ambiguity range,and dynamic measurement characteristics of conventional ranging tools.This review introduces dual-comb ranging and summarizes the key techniques for realizing this ranging tool.As optical frequency comb technology progresses,dualcomb ranging shows promise for various professional applications.
基金supported by the Anhui Provincial Natural Science Foundation(No.2108085MH256 to X.Y.)the Fundamental Research Funds for the Central Universities(No.WK9110000055 to B.N.,No.WK9110000131 to X.Y.).
文摘Background:Enhanced Recovery After Surgery(ERAS)is a multimodal approach for almost all types of surgical procedures,including liver transplantation(LTx).We developed an ERAS protocol for LTx based on previous experience and assessed it using benchmarks from the German Institute for Quality Management and Transparency in Healthcare(IQTIG).Methods:An ERAS protocol was developed and implemented in our center since 2018 for LTx,including preoperative,intraoperative,and postoperative procedures.From January 2021 to December 31st 2022,we conducted a prospective analysis including donor and recipient demographics,Model for End-Stage Liver Disease(MELD)score and medical history.Perioperative management,such as operative time,anhepatic phase time,intensive care unit(ICU)stay,morbidity and mortality as well as postoperative hospitalization,readmission and 1-year patient survival,were collected as outcome measures.Results:Sixty-eight consecutive liver transplant recipients were included.Mean age of the donors was 47(36-55.5)years old,type of donation was in 41 donation after brain death(DBD),26 donation after controlled circulatory death(DCD)and 1 donation after brain and cardiac death(DBCD).Mean age of the patients was 49.6 years(range,26-68 years),81%were male.The mean body mass index(BMI)of the recipients was 24 kg/m^(2)(range,15-37 kg/m^(2)),mean MELD score was 15(range,6-39),3 patients had a MELD score higher than 30.Fifty-three patients suffered from hepatitis B virus(HBV)related cirrhosis.Twenty-eight patients had hepatocellular carcinoma(HCC);5 patients were diagnosed with alcohol related cirrhosis and primary biliary cirrhosis,autoimmune disease and drug induced cirrhosis,undefined cirrhosis,respectively.The mean operation time in our cohort was 6.73 hours,and the average anhepatic phase time was 68 minutes.No patient had intraoperative hypothermia.Tracheal extubation was performed in the ICU department within 6 hours post operation and the average ICU/intermediate care(IMC)unit stay was 4.5 days(range,2-14 days).None of the patients required re-intubation.Postoperative complications with a CDC classification>II were seen in 16 patients(23.5%).Mean hospital stay was 21.7 days and readmission rate was 13(19%).Neither acute rejection nor postoperative mortality during the hospital stay was recorded.One patient died from acute myocardial infarction after discharge.Conclusions:We developed an ERAS protocol in LTx,consisting of preoperative,perioperative and postoperative management and assessed the quality using benchmarks from IQTIG.Our study revealed that the proposed ERAS approach in LTx is feasible offering the opportunities of enhanced recovery and quality management.
基金This work was supported in part by the National Natural Science Foundation of China(Grant No.62101394)the National Science Fund for Distinguished Young Scholars(Grant No.62225108)+1 种基金the Foundation from Guangxi Key Laboratory of Optoelectronic Information Processing(Grant No.GD21203)the Beijing Nova Program(Grant No.2304842874).
文摘Radio frequency(RF)energy harvester as an efficient tool for capturing and converting the flourishing ambient RF energy provides a promising solution for long-term powering the wireless sensor networks and the Internet of things(IoTs).However,the actual distribution of the environmental RF signals is dynamically frequency-dependent due to the diverse wireless terminals only interacting with specified frequencies.To take full advantage of the RF energy carrying this characteristic,an intelligent RF energy harvester is in demand to automatically sense the frequency information of an incident signal and conduct the corresponding RF-to-direct current transformation process.Here,to the best of my knowledge,a frequency-self-adaptive RF harvester is first presented with the help of the shape-reconfigurable liquid metal,which can precisely identify and efficiently convert an arbitrary signal from the frequency span of 1.8 to 2.6 GHz.Companied with a microcontroller unit and a tensile system,the dynamic functionality of the entire system is comprehensively demonstrated,showing promising potential to significantly advance various fields,including sustainable IoT applications,green wearable technologies,and self-powered devices.
基金National Natural Science Foundation of China(61205042,61675096)Natural Science Foundation of Jiangsu Province(BK20141393)+1 种基金Six Talent Peaks Project in Jiangsu Province(XYDXX-027)Fundamental Research Funds for the Central Universities(30919011106)。
文摘Understanding the mode’s origin in planar metamaterials is fundamental for related applications in nanophotonics and plasmonics.For complex planar metamaterials,conventional analysis that directly obtains the final charge/current distribution of a mode is usually difficult in helping to understand the mode’s origin.In this paper,we propose a mode evolution method(MEM)with a core analysis tool,i.e.,plasmonic evolution maps(PEMs),to describe the mode evolution in several complementary planar metamaterials with designed plasmonic atoms/molecules.The PEMs could not only clearly explain a mode’s origin,but also reveal the role of a structure’s symmetry in the mode formation process.The MEM with PEMs can work as a simple,efficient,and universal approach for the mode analysis in different kinds of planar metamaterials.
