城市地下管廊内布设了大量的管线,如燃气管道、网络通讯线路、电力线路等,由于地下环境复杂多变,存在着气体泄漏、爆炸、火灾等安全风险。针对这些问题,提出一种基于窄带物联网技术(Narrow Band Internet of Things,NB-IoT)的地下管廊...城市地下管廊内布设了大量的管线,如燃气管道、网络通讯线路、电力线路等,由于地下环境复杂多变,存在着气体泄漏、爆炸、火灾等安全风险。针对这些问题,提出一种基于窄带物联网技术(Narrow Band Internet of Things,NB-IoT)的地下管廊环境监测系统。该系统采用先进的传感器技术、NB-IoT技术、软件技术,系统主要分为数据采集模块、物联网云平台、远程监测系统三部分。数据采集模块以STM32作为主控单元连接各个传感器,采集温度、湿度、水位、可燃气体等数据,经过处理后利用NB-IoT网络上传到物联网云平台,远程监测系统调用物联网云平台的数据接口进行远程显示与预警。实验结果表明,系统在降低系统总体功耗的同时,能够实时、稳定地进行地下管廊环境监测,提前预防可能存在的风险。展开更多
In recent times,various power control and clustering approaches have been proposed to enhance overall performance for cell-free massive multipleinput multiple-output(CF-mMIMO)networks.With the emergence of deep reinfo...In recent times,various power control and clustering approaches have been proposed to enhance overall performance for cell-free massive multipleinput multiple-output(CF-mMIMO)networks.With the emergence of deep reinforcement learning(DRL),significant progress has been made in the field of network optimization as DRL holds great promise for improving network performance and efficiency.In this work,our focus delves into the intricate challenge of joint cooperation clustering and downlink power control within CF-mMIMO networks.Leveraging the potent deep deterministic policy gradient(DDPG)algorithm,our objective is to maximize the proportional fairness(PF)for user rates,thereby aiming to achieve optimal network performance and resource utilization.Moreover,we harness the concept of“divide and conquer”strategy,introducing two innovative methods termed alternating DDPG(A-DDPG)and hierarchical DDPG(H-DDPG).These approaches aim to decompose the intricate joint optimization problem into more manageable sub-problems,thereby facilitating a more efficient resolution process.Our findings unequivo-cally showcase the superior efficacy of our proposed DDPG approach over the baseline schemes in both clustering and downlink power control.Furthermore,the A-DDPG and H-DDPG obtain higher performance gain than DDPG with lower computational complexity.展开更多
目的观察原发性高血压合并焦虑、抑郁病人应用舍曲林治疗对情绪、血清S100B蛋白(神经组织蛋白质S100)与心肌营养素1(CT-1)及血压的影响。方法选取新乡医学院第二附属医院2015年12月至2017年6月收治的106例原发性高血压合并焦虑、抑郁的...目的观察原发性高血压合并焦虑、抑郁病人应用舍曲林治疗对情绪、血清S100B蛋白(神经组织蛋白质S100)与心肌营养素1(CT-1)及血压的影响。方法选取新乡医学院第二附属医院2015年12月至2017年6月收治的106例原发性高血压合并焦虑、抑郁的病人为研究对象,退出6例,将剩余100例按随机数字表法分为对照组和观察组,所有病人均应用替米沙坦口服,观察组加用舍曲林口服,对照组加用相同剂型的安慰剂口服,持续治疗1月。于治疗前后应用焦虑自评量表(SAS)及抑郁自评量表(SDS)对两组病人焦虑及抑郁症状进行评分,用动态血压仪测定两组病人治疗前后24 h平均收缩压(24 h SBP)、24 h平均舒张压(24 h DBP)、白昼平均收缩压(d SBP)、夜间平均收缩压(nSBP)、白昼平均舒张压(dDBP)及夜间平均舒张压(n DBP),并用酶联免疫吸附法检测血清S100B、CT-1水平。结果观察组治疗后SAS、SDS评分分别为(39.7±6.7)分、(38.4±5.3)分,对照组分别为(64.7±5.8)分、(58.1±4.9)分,观察组治疗后SAS、SDS评分低于对照组(t=19.965,19.369,均P<0.001);观察组治疗后24 h SBP、24hDBP、dSBP、nSBP、dDBP、nDBP分别为(118.2±6.7)、(78.3±6.6)、(124.1±7.3)、(112.3±6.1)、(82.5±6.8)、(74.1±6.4)mmHg,对照组分别为(121.7±7.1)、(82.3±7.2)、(127.2±8.1)、(116.2±5.7)、(85.2±6.6)、(79.4±7.8)mmHg,观察组治疗后24 h SBP、24 h DBP、dSBP、nSBP、d DBP、nDBP水平低于对照组(t=2.535,P<0.05;t=2.896,P<0.05;t=2.010,P<0.05;t=3.303,P<0.01;t=2.012,P<0.05;t=3.714,P<0.001);观察组治疗后血清S100B、CT-1分别为(60.6±13.4)pg/mL、(47.8±12.5)ng/L,对照组分别为(88.4±15.7)pg/mL、(56.7±11.2)ng/L,观察组治疗后血清S100B、CT-1水平低于对照组(t=7.468,3.751,均P<0.001)。结论舍曲林能有效改善原发性高血压合并焦虑、抑郁病人的焦虑、抑郁情绪,并辅助降低血压,从而血清S100B、CT-1水平下降。展开更多
文摘城市地下管廊内布设了大量的管线,如燃气管道、网络通讯线路、电力线路等,由于地下环境复杂多变,存在着气体泄漏、爆炸、火灾等安全风险。针对这些问题,提出一种基于窄带物联网技术(Narrow Band Internet of Things,NB-IoT)的地下管廊环境监测系统。该系统采用先进的传感器技术、NB-IoT技术、软件技术,系统主要分为数据采集模块、物联网云平台、远程监测系统三部分。数据采集模块以STM32作为主控单元连接各个传感器,采集温度、湿度、水位、可燃气体等数据,经过处理后利用NB-IoT网络上传到物联网云平台,远程监测系统调用物联网云平台的数据接口进行远程显示与预警。实验结果表明,系统在降低系统总体功耗的同时,能够实时、稳定地进行地下管廊环境监测,提前预防可能存在的风险。
基金supported by Guangdong Basic and Applied Basic Research Foundation under Grant 2024A1515012015supported in part by the National Natural Science Foundation of China under Grant 62201336+4 种基金in part by Guangdong Basic and Applied Basic Research Foundation under Grant 2024A1515011541supported in part by the National Natural Science Foundation of China under Grant 62371344in part by the Fundamental Research Funds for the Central Universitiessupported in part by Knowledge Innovation Program of Wuhan-Shuguang Project under Grant 2023010201020316in part by Guangdong Basic and Applied Basic Research Foundation under Grant 2024A1515010247。
文摘In recent times,various power control and clustering approaches have been proposed to enhance overall performance for cell-free massive multipleinput multiple-output(CF-mMIMO)networks.With the emergence of deep reinforcement learning(DRL),significant progress has been made in the field of network optimization as DRL holds great promise for improving network performance and efficiency.In this work,our focus delves into the intricate challenge of joint cooperation clustering and downlink power control within CF-mMIMO networks.Leveraging the potent deep deterministic policy gradient(DDPG)algorithm,our objective is to maximize the proportional fairness(PF)for user rates,thereby aiming to achieve optimal network performance and resource utilization.Moreover,we harness the concept of“divide and conquer”strategy,introducing two innovative methods termed alternating DDPG(A-DDPG)and hierarchical DDPG(H-DDPG).These approaches aim to decompose the intricate joint optimization problem into more manageable sub-problems,thereby facilitating a more efficient resolution process.Our findings unequivo-cally showcase the superior efficacy of our proposed DDPG approach over the baseline schemes in both clustering and downlink power control.Furthermore,the A-DDPG and H-DDPG obtain higher performance gain than DDPG with lower computational complexity.
文摘目的观察原发性高血压合并焦虑、抑郁病人应用舍曲林治疗对情绪、血清S100B蛋白(神经组织蛋白质S100)与心肌营养素1(CT-1)及血压的影响。方法选取新乡医学院第二附属医院2015年12月至2017年6月收治的106例原发性高血压合并焦虑、抑郁的病人为研究对象,退出6例,将剩余100例按随机数字表法分为对照组和观察组,所有病人均应用替米沙坦口服,观察组加用舍曲林口服,对照组加用相同剂型的安慰剂口服,持续治疗1月。于治疗前后应用焦虑自评量表(SAS)及抑郁自评量表(SDS)对两组病人焦虑及抑郁症状进行评分,用动态血压仪测定两组病人治疗前后24 h平均收缩压(24 h SBP)、24 h平均舒张压(24 h DBP)、白昼平均收缩压(d SBP)、夜间平均收缩压(nSBP)、白昼平均舒张压(dDBP)及夜间平均舒张压(n DBP),并用酶联免疫吸附法检测血清S100B、CT-1水平。结果观察组治疗后SAS、SDS评分分别为(39.7±6.7)分、(38.4±5.3)分,对照组分别为(64.7±5.8)分、(58.1±4.9)分,观察组治疗后SAS、SDS评分低于对照组(t=19.965,19.369,均P<0.001);观察组治疗后24 h SBP、24hDBP、dSBP、nSBP、dDBP、nDBP分别为(118.2±6.7)、(78.3±6.6)、(124.1±7.3)、(112.3±6.1)、(82.5±6.8)、(74.1±6.4)mmHg,对照组分别为(121.7±7.1)、(82.3±7.2)、(127.2±8.1)、(116.2±5.7)、(85.2±6.6)、(79.4±7.8)mmHg,观察组治疗后24 h SBP、24 h DBP、dSBP、nSBP、d DBP、nDBP水平低于对照组(t=2.535,P<0.05;t=2.896,P<0.05;t=2.010,P<0.05;t=3.303,P<0.01;t=2.012,P<0.05;t=3.714,P<0.001);观察组治疗后血清S100B、CT-1分别为(60.6±13.4)pg/mL、(47.8±12.5)ng/L,对照组分别为(88.4±15.7)pg/mL、(56.7±11.2)ng/L,观察组治疗后血清S100B、CT-1水平低于对照组(t=7.468,3.751,均P<0.001)。结论舍曲林能有效改善原发性高血压合并焦虑、抑郁病人的焦虑、抑郁情绪,并辅助降低血压,从而血清S100B、CT-1水平下降。
