BACKGROUND Inadequate glycemic control in patients with type 2 diabetes(T2DM)is a major public health problem and a significant risk factor for the progression of diabetic complications.AIM To evaluate the effects of ...BACKGROUND Inadequate glycemic control in patients with type 2 diabetes(T2DM)is a major public health problem and a significant risk factor for the progression of diabetic complications.AIM To evaluate the effects of intensive and supportive glycemic management strategies over a 12-month period in individuals with T2DM with glycated hemoglobin(HbA1c)≥10%and varying backgrounds of glycemic control.METHODS This prospective observational study investigated glycemic control in patients with poorly controlled T2DM over 12 months.Participants were categorized into four groups based on prior glycemic history:Newly diagnosed,previously well controlled with recent worsening,previously off-target but now worsening,and HbA1c consistently above 10%.HbA1c levels were monitored quarterly,and patients received medical,educational,and dietary support as needed.The analysis focused on the success rates of good glycemic control and the associated factors within each group.RESULTS The study showed significant improvements in HbA1c levels in all participants.The most significant improvement was observed in individuals newly diagnosed with diabetes:65%achieved an HbA1c target of≤7%.The results varied between participants with different glycemic control histories,followed by decreasing success rates:39%in participants with previously good glycemic control,21%in participants whose glycemic control had deteriorated compared to before,and only 10%in participants with persistently poor control,with mean HbA1c levels of 6.3%,7.7%,8.2%,and 9.7%,respectively.After one year,65.2%of the“newly diagnosed patients”,39.3%in the“previously controlled group”,21.9%in the“previously off-target but now worsened'”group and 10%in the“poorly controlled from the start”group had achieved HbA1c levels of 7 and below.CONCLUSION In poorly controlled diabetes,the rate at which treatment goals are achieved is associated with the glycemic background characteristics,emphasizing the need for tailored strategies.Therefore,different and comprehensive treatment approaches are needed for patients with persistent uncontrolled diabetes.展开更多
BACKGROUND Type 2 diabetes mellitus(T2DM)is a chronic metabolic disease characterized by combinations of insulin resistance and insulin deficiency.Non-alcoholic fatty liver disease(NAFLD)is emerging as a public health...BACKGROUND Type 2 diabetes mellitus(T2DM)is a chronic metabolic disease characterized by combinations of insulin resistance and insulin deficiency.Non-alcoholic fatty liver disease(NAFLD)is emerging as a public health problem worldwide and affects up to 70%of patients with T2DM.Although patients with T2DM have an increased risk of developing advanced liver disease compared to healthy individuals,varying prevalence rates of NAFLD among patients with T2DM,ranging from 34%to 94%,have been reported.AIM To determine prevalence and identify associated factors of NAFLD among Limbe patients with T2DM and evaluate correlation with glycemic control.METHODS A cross-sectional study was carried out from February to June 2024 among patients with T2DM.Gamma-glutamyl transferase(GGT)activity and serum triglycerides(TGs)were measured by spectrophotometry.NAFLD was diagnosed using the fatty liver index score.Data were analyzed using SPSS version 26.0 for Windows.Student’s t-test was used to compare the means of two groups.The χ^(2) test was applied to determine the association of NAFLD and T2DM.Logistic regression analysis was performed to identify predictors of NAFLD.P<0.05 was considered statistically significant.RESULTS Of the 150 patients with T2DM recruited for this study,63(58%)were females and the majority(84.7%)had good glycemic control(glycated hemoglobin<7%).Prevalence of NAFLD among patients with T2DM was 19%.Patients with NAFLD had significantly elevated levels of TGs,GGT,and increased body mass index and waist circumference compared to those without NAFLD.There was a significant association between NAFLD and glycemic control.Predictive factors of NAFLD among patients with T2DM were vegetable intake of less than three times per week[adjusted odds ratio(aOR):0.131,95%CI:0.020-0.839;P=0.032],central obesity(aOR:0.167,95%CI:0.037-0.748;P=0.019),and metformin treatment for T2DM(aOR:0.167,95%CI:0.037-0.718;P<0.001).CONCLUSION The prevalence of NAFLD in patients with T2DM in Limbe Regional Hospital was 19%.Age,central obesity,metformin use,and infrequent consumption of vegetables were important predictors of NAFLD.展开更多
Water purification systems based on transition metal dichalcogenides face significant challenges,including lack of reactivity under dark conditions,scarcity of catalytically active sites,and rapid recombination of pho...Water purification systems based on transition metal dichalcogenides face significant challenges,including lack of reactivity under dark conditions,scarcity of catalytically active sites,and rapid recombination of photogenerated charge carriers.Simultaneously increasing the number of active sites and improving charge separation efficiency has proven difficult.In this study,we present a novel approach combining molybdenum(Mo) monoatomic doping and size engineering to produce a series of Mo-ReS_(2) quantum dots(MR QDs) with controllable dimensions.High-resolution structural characterization,first-principle calculations,and piezo force microscopy reveal that Mo monoatomic doping enhances the lattice asymmetry,thereby improving the piezoelectric properties.The resulting piezoelectric polarization and the generated built-in electric field significantly improve charge separation efficiency,leading to optimized photocatalytic performance.Additionally,the doping strategy increases the number of active sites and improves the adsorption of intermediate radicals,substantially boosting photo-sterilization efficiency.Our results demonstrate the elimination of 99.95% of Escherichia coli and 100.00% of Staphylococcus aureus within 30 min.Furthermore,we developed a self-purification system simulating water drainage,utilizing low-frequency water streams to trigger the piezoelectric behavior of MR QDs,achieving piezoelectric synergistic photodegradation.This innovative approach provides a more environmentally friendly and economical method for water self-purification,paving the way for advanced water treatment technologies.展开更多
BACKGROUND The interplay between abnormal glucose metabolism and the progression of liver fibrosis in patients with both chronic hepatitis B(CHB)and type 2 diabetes mellitus(T2DM)remains unclear.Previous studies have ...BACKGROUND The interplay between abnormal glucose metabolism and the progression of liver fibrosis in patients with both chronic hepatitis B(CHB)and type 2 diabetes mellitus(T2DM)remains unclear.Previous studies have suggested that the coexistence of these conditions may exacerbate liver inflammation and fibrosis;however,the impacts of dynamic changes in glucose metabolism indicators,hypoglycemic medication regimens,and glycemic control status on liver fibrosis require further elucidation.AIM To explore the effect of glycemic control on hepatic fibrosis in patients with CHB and T2DM.METHODS A total of 420 patients with CHB and T2DM admitted to the Public Health Clinical Center of Chengdu between October 2018 and January 2022 were retrospectively included and classified according to liver stiffness measurement and glycemic control for between-group comparisons.RESULTS Significant differences were observed in the alanine aminotransferase(ALT),aspartate aminotransferase(AST),alkaline phosphatase,AST/ALT ratio,total bilirubin,direct bilirubin,diabetes treatment program,and thrombin time values among the liver fibrosis groups(adjusted P<0.05).Significant differences in albumin and gamma-glutamyl transferase levels were observed among the groups categorized by glucose status at admission(adjusted P<0.05).A positive correlation between fasting plasma glucose(FPG)and liver stiffness measurement was found to be mediated by ALT and AST.Fibrinogen and the international normalized ratio were positively correlated with glycated hemoglobin A1c,while the fibrosis-4 score,ALT,AST/ALT ratio,type III procollagen N-terminal peptide,ferritin,and activated partial thromboplastin time were correlated with FPG at admission.Additionally,AST was positively correlated with FPG at discharge(P<0.05).CONCLUSION Specific glucose metabolic parameters,hypoglycemic agents,and glycemic control status markers are associated with hepatic fibrosis in patients with both CHB and T2DM.Close blood glucose monitoring,optimized use of hypoglycemic agents,and continuous maintenance of good glycemic control may slow the progression of liver fibrosis in patients with CHB and T2DM.展开更多
An Interval Type-2(IT-2)fuzzy controller design approach is proposed in this research to simultaneously achievemultiple control objectives inNonlinearMulti-Agent Systems(NMASs),including formation,containment,and coll...An Interval Type-2(IT-2)fuzzy controller design approach is proposed in this research to simultaneously achievemultiple control objectives inNonlinearMulti-Agent Systems(NMASs),including formation,containment,and collision avoidance.However,inherent nonlinearities and uncertainties present in practical control systems contribute to the challenge of achieving precise control performance.Based on the IT-2 Takagi-Sugeno Fuzzy Model(T-SFM),the fuzzy control approach can offer a more effective solution for NMASs facing uncertainties.Unlike existing control methods for NMASs,the Formation and Containment(F-and-C)control problem with collision avoidance capability under uncertainties based on the IT-2 T-SFM is discussed for the first time.Moreover,an IT-2 fuzzy tracking control approach is proposed to solve the formation task for leaders in NMASs without requiring communication.This control scheme makes the design process of the IT-2 fuzzy Formation Controller(FC)more straightforward and effective.According to the communication interaction protocol,the IT-2 Containment Controller(CC)design approach is proposed for followers to ensure convergence into the region defined by the leaders.Leveraging the IT-2 T-SFM representation,the analysis methods developed for linear Multi-Agent Systems(MASs)are successfully extended to perform containment analysis without requiring the additional assumptions imposed in existing research.Notably,the IT-2 fuzzy tracking controller can also be applied in collision avoidance situations to track the desired trajectories calculated by the avoidance algorithm under the Artificial Potential Field(APF).Benefiting from the combination of vortex and source APFs,the leaders can properly adjust the system dynamics to prevent potential collision risk.Integrating the fuzzy theory and APFs avoidance algorithm,an IT-2 fuzzy controller design approach is proposed to achieve the F-and-C purposewhile ensuring collision avoidance capability.Finally,amulti-ship simulation is conducted to validate the feasibility and effectiveness of the designed IT-2 fuzzy controller.展开更多
目的:系统评价推拿疗法在肥胖合并2型糖尿病患者中的临床疗效及安全性,为临床治疗提供循证医学依据。方法:检索PubMed、Web of Science、Embase、Cochrane Library、中国知网、万方、维普数据库,收集截至2025年2月6日发表的关于推拿治...目的:系统评价推拿疗法在肥胖合并2型糖尿病患者中的临床疗效及安全性,为临床治疗提供循证医学依据。方法:检索PubMed、Web of Science、Embase、Cochrane Library、中国知网、万方、维普数据库,收集截至2025年2月6日发表的关于推拿治疗肥胖合并2型糖尿病的随机对照试验(RCT)。按照PICOS原则筛选符合标准的研究,采用RevMan 5.4软件进行Meta分析。结果:共纳入8项RCT研究,涉及531例患者(治疗组266例,对照组265例)。Meta分析结果显示,与单纯基础治疗相比,推拿联合基础治疗在降低空腹血糖(FPG)[MD=-0.71,95%CI(-0.93,-0.49),P<0.001]、餐后2 h血糖(2 h PG)[MD=-1.05,95%CI(-1.30,-0.80),P<0.001]及胰岛素抵抗指数(HOMA-IR)[MD=-1.81,95%CI(-2.20,-1.42),P<0.001]方面均具有显著优势。此外,推拿联合基础治疗可有效降低体重指数(BMI)[MD=-0.67,95%CI(-1.09,-0.24),P=0.002],减少腰围[MD=-2.35,95%CI(-3.38,-1.33),P<0.001],并改善总胆固醇(TC)[MD=-0.80,95%CI(-1.06,-0.55),P<0.001]和甘油三酯(TG)[MD=-0.40,95%CI(-0.48,-0.32),P<0.001]。推拿治疗未显著增加不良反应发生率,与对照组差异无统计学意义(P>0.05)。结论:推拿联合基础治疗可有效改善肥胖合并2型糖尿病患者的血糖、血脂及体重指标,具有良好的临床疗效和安全性。展开更多
研究了区间二型模糊双线性系统的广义H_(2)控制问题。首先,设计新的李雅普诺夫泛函,采用静态输出反馈控制器,得到了确保闭环系统广义H_(2)稳定性的充分性条件;其次,利用序列线性规划矩阵(sequential linear programming matrix,SLPM)方...研究了区间二型模糊双线性系统的广义H_(2)控制问题。首先,设计新的李雅普诺夫泛函,采用静态输出反馈控制器,得到了确保闭环系统广义H_(2)稳定性的充分性条件;其次,利用序列线性规划矩阵(sequential linear programming matrix,SLPM)方法求解双线性矩阵不等式进行求解控制器增益;最后,通过一个数值例子验证了所得定理的正确性。展开更多
The visible-light-driven hydrogen evolution is extremely important,but the poor charge transfer capa-bility,a sluggish evolution rate of hydrogen,and severe photo-corrosion make photocatalytic hydrogen evolution impra...The visible-light-driven hydrogen evolution is extremely important,but the poor charge transfer capa-bility,a sluggish evolution rate of hydrogen,and severe photo-corrosion make photocatalytic hydrogen evolution impractical.In this study,we present 1D/2D ReS_(2)-CdS hybrid nanorods for photocatalytic hy-drogen evolution,comprised of a ReS_(2)nanosheet layer grown on CdS nanorods.We found that precise control of the contents of the ReS_(2)nanosheet layer allows for manipulating the electronic structure of Re in the ReS_(2)-CdS hybrid nanorods.The ReS_(2)-CdS hybrid nanorods with optimal ReS_(2)nanosheet layer content dramatically improve photocatalytic hydrogen evolution activity.Notably,photocatalytic hydro-gen evolution activity(64.93 mmol g^(−1)h^(−1))of ReS_(2)-CdS hybrid nanorods with ReS_(2)nanosheet layers(Re/Cd atomic ratio of 0.051)is approximately 136 times higher than that of pure CdS nanorods under visible light irradiation.Furthermore,intimated coupling of the ReS_(2)nanosheet layer with CdS nanorods reduced the surface trap-site of the CdS nanorods,resulting in enhanced photocatalytic stability.The de-tailed optical and electrical investigations demonstrate that the optimal ReS_(2)nanosheet layer contents in the ReS_(2)-CdS hybrid nanorods can provide improved charge transfer capability,catalytic activity,and light absorption efficiency.This study sheds light on the development of photocatalysts for highly efficient photocatalytic hydrogen evolution.展开更多
文摘BACKGROUND Inadequate glycemic control in patients with type 2 diabetes(T2DM)is a major public health problem and a significant risk factor for the progression of diabetic complications.AIM To evaluate the effects of intensive and supportive glycemic management strategies over a 12-month period in individuals with T2DM with glycated hemoglobin(HbA1c)≥10%and varying backgrounds of glycemic control.METHODS This prospective observational study investigated glycemic control in patients with poorly controlled T2DM over 12 months.Participants were categorized into four groups based on prior glycemic history:Newly diagnosed,previously well controlled with recent worsening,previously off-target but now worsening,and HbA1c consistently above 10%.HbA1c levels were monitored quarterly,and patients received medical,educational,and dietary support as needed.The analysis focused on the success rates of good glycemic control and the associated factors within each group.RESULTS The study showed significant improvements in HbA1c levels in all participants.The most significant improvement was observed in individuals newly diagnosed with diabetes:65%achieved an HbA1c target of≤7%.The results varied between participants with different glycemic control histories,followed by decreasing success rates:39%in participants with previously good glycemic control,21%in participants whose glycemic control had deteriorated compared to before,and only 10%in participants with persistently poor control,with mean HbA1c levels of 6.3%,7.7%,8.2%,and 9.7%,respectively.After one year,65.2%of the“newly diagnosed patients”,39.3%in the“previously controlled group”,21.9%in the“previously off-target but now worsened'”group and 10%in the“poorly controlled from the start”group had achieved HbA1c levels of 7 and below.CONCLUSION In poorly controlled diabetes,the rate at which treatment goals are achieved is associated with the glycemic background characteristics,emphasizing the need for tailored strategies.Therefore,different and comprehensive treatment approaches are needed for patients with persistent uncontrolled diabetes.
文摘BACKGROUND Type 2 diabetes mellitus(T2DM)is a chronic metabolic disease characterized by combinations of insulin resistance and insulin deficiency.Non-alcoholic fatty liver disease(NAFLD)is emerging as a public health problem worldwide and affects up to 70%of patients with T2DM.Although patients with T2DM have an increased risk of developing advanced liver disease compared to healthy individuals,varying prevalence rates of NAFLD among patients with T2DM,ranging from 34%to 94%,have been reported.AIM To determine prevalence and identify associated factors of NAFLD among Limbe patients with T2DM and evaluate correlation with glycemic control.METHODS A cross-sectional study was carried out from February to June 2024 among patients with T2DM.Gamma-glutamyl transferase(GGT)activity and serum triglycerides(TGs)were measured by spectrophotometry.NAFLD was diagnosed using the fatty liver index score.Data were analyzed using SPSS version 26.0 for Windows.Student’s t-test was used to compare the means of two groups.The χ^(2) test was applied to determine the association of NAFLD and T2DM.Logistic regression analysis was performed to identify predictors of NAFLD.P<0.05 was considered statistically significant.RESULTS Of the 150 patients with T2DM recruited for this study,63(58%)were females and the majority(84.7%)had good glycemic control(glycated hemoglobin<7%).Prevalence of NAFLD among patients with T2DM was 19%.Patients with NAFLD had significantly elevated levels of TGs,GGT,and increased body mass index and waist circumference compared to those without NAFLD.There was a significant association between NAFLD and glycemic control.Predictive factors of NAFLD among patients with T2DM were vegetable intake of less than three times per week[adjusted odds ratio(aOR):0.131,95%CI:0.020-0.839;P=0.032],central obesity(aOR:0.167,95%CI:0.037-0.748;P=0.019),and metformin treatment for T2DM(aOR:0.167,95%CI:0.037-0.718;P<0.001).CONCLUSION The prevalence of NAFLD in patients with T2DM in Limbe Regional Hospital was 19%.Age,central obesity,metformin use,and infrequent consumption of vegetables were important predictors of NAFLD.
基金financially supported by the National Natural Science Foundation of China (No.52071146)Guangdong Provincial Natural Science Foundation (No.2023A1515010989)the Science and Technology Projects in Guangzhou (No.202201000008)。
文摘Water purification systems based on transition metal dichalcogenides face significant challenges,including lack of reactivity under dark conditions,scarcity of catalytically active sites,and rapid recombination of photogenerated charge carriers.Simultaneously increasing the number of active sites and improving charge separation efficiency has proven difficult.In this study,we present a novel approach combining molybdenum(Mo) monoatomic doping and size engineering to produce a series of Mo-ReS_(2) quantum dots(MR QDs) with controllable dimensions.High-resolution structural characterization,first-principle calculations,and piezo force microscopy reveal that Mo monoatomic doping enhances the lattice asymmetry,thereby improving the piezoelectric properties.The resulting piezoelectric polarization and the generated built-in electric field significantly improve charge separation efficiency,leading to optimized photocatalytic performance.Additionally,the doping strategy increases the number of active sites and improves the adsorption of intermediate radicals,substantially boosting photo-sterilization efficiency.Our results demonstrate the elimination of 99.95% of Escherichia coli and 100.00% of Staphylococcus aureus within 30 min.Furthermore,we developed a self-purification system simulating water drainage,utilizing low-frequency water streams to trigger the piezoelectric behavior of MR QDs,achieving piezoelectric synergistic photodegradation.This innovative approach provides a more environmentally friendly and economical method for water self-purification,paving the way for advanced water treatment technologies.
基金Supported by Natural Science Foundation of Sichuan Province,No.2023NSFSC0682.
文摘BACKGROUND The interplay between abnormal glucose metabolism and the progression of liver fibrosis in patients with both chronic hepatitis B(CHB)and type 2 diabetes mellitus(T2DM)remains unclear.Previous studies have suggested that the coexistence of these conditions may exacerbate liver inflammation and fibrosis;however,the impacts of dynamic changes in glucose metabolism indicators,hypoglycemic medication regimens,and glycemic control status on liver fibrosis require further elucidation.AIM To explore the effect of glycemic control on hepatic fibrosis in patients with CHB and T2DM.METHODS A total of 420 patients with CHB and T2DM admitted to the Public Health Clinical Center of Chengdu between October 2018 and January 2022 were retrospectively included and classified according to liver stiffness measurement and glycemic control for between-group comparisons.RESULTS Significant differences were observed in the alanine aminotransferase(ALT),aspartate aminotransferase(AST),alkaline phosphatase,AST/ALT ratio,total bilirubin,direct bilirubin,diabetes treatment program,and thrombin time values among the liver fibrosis groups(adjusted P<0.05).Significant differences in albumin and gamma-glutamyl transferase levels were observed among the groups categorized by glucose status at admission(adjusted P<0.05).A positive correlation between fasting plasma glucose(FPG)and liver stiffness measurement was found to be mediated by ALT and AST.Fibrinogen and the international normalized ratio were positively correlated with glycated hemoglobin A1c,while the fibrosis-4 score,ALT,AST/ALT ratio,type III procollagen N-terminal peptide,ferritin,and activated partial thromboplastin time were correlated with FPG at admission.Additionally,AST was positively correlated with FPG at discharge(P<0.05).CONCLUSION Specific glucose metabolic parameters,hypoglycemic agents,and glycemic control status markers are associated with hepatic fibrosis in patients with both CHB and T2DM.Close blood glucose monitoring,optimized use of hypoglycemic agents,and continuous maintenance of good glycemic control may slow the progression of liver fibrosis in patients with CHB and T2DM.
基金founded by the National Science and Technology Council of the Republic of China under contract NSTC113-2221-E-019-032.
文摘An Interval Type-2(IT-2)fuzzy controller design approach is proposed in this research to simultaneously achievemultiple control objectives inNonlinearMulti-Agent Systems(NMASs),including formation,containment,and collision avoidance.However,inherent nonlinearities and uncertainties present in practical control systems contribute to the challenge of achieving precise control performance.Based on the IT-2 Takagi-Sugeno Fuzzy Model(T-SFM),the fuzzy control approach can offer a more effective solution for NMASs facing uncertainties.Unlike existing control methods for NMASs,the Formation and Containment(F-and-C)control problem with collision avoidance capability under uncertainties based on the IT-2 T-SFM is discussed for the first time.Moreover,an IT-2 fuzzy tracking control approach is proposed to solve the formation task for leaders in NMASs without requiring communication.This control scheme makes the design process of the IT-2 fuzzy Formation Controller(FC)more straightforward and effective.According to the communication interaction protocol,the IT-2 Containment Controller(CC)design approach is proposed for followers to ensure convergence into the region defined by the leaders.Leveraging the IT-2 T-SFM representation,the analysis methods developed for linear Multi-Agent Systems(MASs)are successfully extended to perform containment analysis without requiring the additional assumptions imposed in existing research.Notably,the IT-2 fuzzy tracking controller can also be applied in collision avoidance situations to track the desired trajectories calculated by the avoidance algorithm under the Artificial Potential Field(APF).Benefiting from the combination of vortex and source APFs,the leaders can properly adjust the system dynamics to prevent potential collision risk.Integrating the fuzzy theory and APFs avoidance algorithm,an IT-2 fuzzy controller design approach is proposed to achieve the F-and-C purposewhile ensuring collision avoidance capability.Finally,amulti-ship simulation is conducted to validate the feasibility and effectiveness of the designed IT-2 fuzzy controller.
文摘目的:系统评价推拿疗法在肥胖合并2型糖尿病患者中的临床疗效及安全性,为临床治疗提供循证医学依据。方法:检索PubMed、Web of Science、Embase、Cochrane Library、中国知网、万方、维普数据库,收集截至2025年2月6日发表的关于推拿治疗肥胖合并2型糖尿病的随机对照试验(RCT)。按照PICOS原则筛选符合标准的研究,采用RevMan 5.4软件进行Meta分析。结果:共纳入8项RCT研究,涉及531例患者(治疗组266例,对照组265例)。Meta分析结果显示,与单纯基础治疗相比,推拿联合基础治疗在降低空腹血糖(FPG)[MD=-0.71,95%CI(-0.93,-0.49),P<0.001]、餐后2 h血糖(2 h PG)[MD=-1.05,95%CI(-1.30,-0.80),P<0.001]及胰岛素抵抗指数(HOMA-IR)[MD=-1.81,95%CI(-2.20,-1.42),P<0.001]方面均具有显著优势。此外,推拿联合基础治疗可有效降低体重指数(BMI)[MD=-0.67,95%CI(-1.09,-0.24),P=0.002],减少腰围[MD=-2.35,95%CI(-3.38,-1.33),P<0.001],并改善总胆固醇(TC)[MD=-0.80,95%CI(-1.06,-0.55),P<0.001]和甘油三酯(TG)[MD=-0.40,95%CI(-0.48,-0.32),P<0.001]。推拿治疗未显著增加不良反应发生率,与对照组差异无统计学意义(P>0.05)。结论:推拿联合基础治疗可有效改善肥胖合并2型糖尿病患者的血糖、血脂及体重指标,具有良好的临床疗效和安全性。
文摘研究了区间二型模糊双线性系统的广义H_(2)控制问题。首先,设计新的李雅普诺夫泛函,采用静态输出反馈控制器,得到了确保闭环系统广义H_(2)稳定性的充分性条件;其次,利用序列线性规划矩阵(sequential linear programming matrix,SLPM)方法求解双线性矩阵不等式进行求解控制器增益;最后,通过一个数值例子验证了所得定理的正确性。
基金supported by the National Re-search Foundation of Korea(Nos.NRF-2020R1C1C1008514,2019R1A6A1A11053838,and NRF-2023R1A2C1004015)the“Regional Innovation Strategy(RIS)”through the National Research Foundation of Korea(NRF)funded by the Ministry of Education(MOE)(No.2021RIS-003).
文摘The visible-light-driven hydrogen evolution is extremely important,but the poor charge transfer capa-bility,a sluggish evolution rate of hydrogen,and severe photo-corrosion make photocatalytic hydrogen evolution impractical.In this study,we present 1D/2D ReS_(2)-CdS hybrid nanorods for photocatalytic hy-drogen evolution,comprised of a ReS_(2)nanosheet layer grown on CdS nanorods.We found that precise control of the contents of the ReS_(2)nanosheet layer allows for manipulating the electronic structure of Re in the ReS_(2)-CdS hybrid nanorods.The ReS_(2)-CdS hybrid nanorods with optimal ReS_(2)nanosheet layer content dramatically improve photocatalytic hydrogen evolution activity.Notably,photocatalytic hydro-gen evolution activity(64.93 mmol g^(−1)h^(−1))of ReS_(2)-CdS hybrid nanorods with ReS_(2)nanosheet layers(Re/Cd atomic ratio of 0.051)is approximately 136 times higher than that of pure CdS nanorods under visible light irradiation.Furthermore,intimated coupling of the ReS_(2)nanosheet layer with CdS nanorods reduced the surface trap-site of the CdS nanorods,resulting in enhanced photocatalytic stability.The de-tailed optical and electrical investigations demonstrate that the optimal ReS_(2)nanosheet layer contents in the ReS_(2)-CdS hybrid nanorods can provide improved charge transfer capability,catalytic activity,and light absorption efficiency.This study sheds light on the development of photocatalysts for highly efficient photocatalytic hydrogen evolution.
