Convex feasibility problems are widely used in image reconstruction, sparse signal recovery, and other areas. This paper is devoted to considering a class of convex feasibility problem arising from sparse signal recov...Convex feasibility problems are widely used in image reconstruction, sparse signal recovery, and other areas. This paper is devoted to considering a class of convex feasibility problem arising from sparse signal recovery. We first derive the projection formulas for a vector onto the feasible sets. The centralized circumcentered-reflection method is designed to solve the convex feasibility problem. Some numerical experiments demonstrate the feasibility and effectiveness of the proposed algorithm, showing superior performance compared to conventional alternating projection methods.展开更多
Objectives This study aimed to design and evaluate a detection system for the accidental dislodgement of head-and-neck medical supplies through hand position recognition and tracking in Intensive Care Unit(ICU)patient...Objectives This study aimed to design and evaluate a detection system for the accidental dislodgement of head-and-neck medical supplies through hand position recognition and tracking in Intensive Care Unit(ICU)patients.Methods We conducted a single-center,prospective,parallel-group feasibility randomized controlled trial.We recruited 80 participants using convenience sampling from the ICU of a hospital in Ningbo City,Zhejiang Province,between March 2025 and June 2025,and they were randomly assigned to either the control group(routine care)or the intervention group(routine care plus image recognition-based detection system).The system continuously tracked patients’hand positions via bedside cameras and generated real-time alarms when hands entered predefined risk zones,notifying on-duty nurses to enable early intervention.System stability was assessed by continuous system uptime;system performance and clinical feasibility were evaluated by the frequencies of risk actions and accidental dislodgement of medical supplies(ADMS).Results All 80 participants completed the intervention,with 40 patients in each group.The baseline characteristics and median observation time of the two groups were balanced(intervention group:48 h/patient vs.control group:49 h/patient).Compared with the control group,the intervention group showed fewer ADMS(2/40 vs.9/40)and detected more risk actions per 100 h(36 vs.25);all system-detected events had corroborating images with complete concordance on manual review,and all nurse-recorded hand-contact events were accurately captured.Conclusions The study demonstrated that the image recognition-based detection system can function stably in clinical settings,providing accurate and continuous surveillance while supporting the early detection of risk actions.By reducing the observation burden and offering real-time cognitive support,the system complements routine nursing care and serves as an additional safety measure in ICU practice.With further optimization and larger multicenter validation,this approach could have the potential to make a significant contribution to the development of smart ICUs and the broader digital transformation of nursing care.展开更多
BACKGROUND Clinical decision-making in urinary tract infections depends heavily on accurately distinguishing between pathogenic and non-pathogenic organisms.The interpretation of urine culture results is influenced by...BACKGROUND Clinical decision-making in urinary tract infections depends heavily on accurately distinguishing between pathogenic and non-pathogenic organisms.The interpretation of urine culture results is influenced by proper sample collection,the patient's clinical context,and organism-specific characteristics.However,there is currently no definitive method to determine whether a urinary isolate is truly pathogenic.This distinction is critical,as treatment decisions hinge on it.This pioneering study systematically applies a stepwise model to differentiate pathogenic from non-pathogenic urinary isolates—an approach not previously described.AIM To determine whether a urinary isolate is pathogenic(commensal,colonizer,or direct pathogen)or non-pathogenic(commensal,colonizer,or contaminant)using a structured,stepwise approach.METHODS This prospective,longitudinal,exploratory study was conducted over 24 months,starting in January 2022,at All India Institute of Medical Sciences Rishikesh,following approval from the Institutional Ethics Committee.A stepwise model developed by the investigators was applied to assess the nature of the isolates.Data recorded using REDCap,and analysis was performed using SPSS Version 25.RESULTS A total of 275 consecutive patients aged over 18 years with positive urine cultures—initially treated with antibiotics based on microbiological and clinical assessment—were included.The stepwise model classified 90.54% of cases as pathogenic(commensals:61.81%,colonizers:14.18%,and direct pathogens:14.54%)and 9.45% as non-pathogenic.The model showed that there could be a significant reduction in average hospital stay by over 13 days,along with saving approximately Rs.981 per patient in antibiotic costs in non-pathogenic cohort.CONCLUSION This novel model identified that approximately one in ten urinary isolates,initially considered pathogenic and treated with antibiotics,were in fact non-pathogenic.The model is safe,feasible,and potentially valuable in resource-limited settings,warranting broader validation and implementation.展开更多
Sites and landscapes of international geological significance are managed with a comprehensive approach of conservation,education,and sustainable development in UNESCO Global Geoparks,which comprise a single,cohesive ...Sites and landscapes of international geological significance are managed with a comprehensive approach of conservation,education,and sustainable development in UNESCO Global Geoparks,which comprise a single,cohesive geographic area.A growing number of people are adopting the bottom-up strategy,which involves local communities and combines sustainable development with conservation.The viability of creating a UNESCO-recognized geopark in Kutch is assessed in this study.This study examines the key geoheritage features of the Kutch region,explores the socio-economic prospects of a geopark through geotourism and community development,and evaluates its conformity with UNESCO’s Global Geopark criteria on conservation,education,and sustainability.The study also evaluates the overall feasibility of the project,its economic,social,and environmental implications,and the adequacy of the requisite infrastructure..Its geological,cultural,and historical significance,as well as socioeconomic and environmental factors,are the parameters considered for investigation.Despite multiple applications to UNESCO,the Gujarat region of Kutch,which is rich in geological,cultural,and historical elements,is not recognised as a World Heritage Site.In actuality,there are 195 geoparks in 48 nations worldwide as of 2023,however India does not have one.The findings of the study provide critical insights that can direct initiatives to establish India’s first geopark and promote regional sustainability.展开更多
Chronic obstructive pulmonary disease(COPD)is a common chronic respiratory disease that severely affects patients’quality of life.Current clinical treatments primarily rely on medication,with limited rehabilitation o...Chronic obstructive pulmonary disease(COPD)is a common chronic respiratory disease that severely affects patients’quality of life.Current clinical treatments primarily rely on medication,with limited rehabilitation options and uncertain efficacy.Home-based exercise rehabilitation,as a non-pharmacological therapy,can promote the improvement of respiratory muscle function and cardiopulmonary endurance,exerting a positive preventive effect on COPD.However,due to factors such as the home environment and lack of health knowledge,COPD patients face numerous difficulties in accepting home-based exercise rehabilitation.This article reviews domestic and international research on the feasibility and effectiveness of home-based exercise rehabilitation for COPD,aiming to provide references for medical workers to better implement home-based exercise rehabilitation for COPD,assist patients in performing rehabilitation exercises at home,improve their quality of life,reduce hospitalization rates,and lower medical costs.展开更多
Dear Editor,Robot-assisted partial nephrectomy(RAPN)has become the preferred surgical treatment for most renal tumors[1].Local recurrences occur in 1%-10% of patients undergoing partial nephrectomy,and they tend to ap...Dear Editor,Robot-assisted partial nephrectomy(RAPN)has become the preferred surgical treatment for most renal tumors[1].Local recurrences occur in 1%-10% of patients undergoing partial nephrectomy,and they tend to appear within the first 5 years after surgery[2].展开更多
Around the world,there has been a notable shift toward the use of renewable energy technology due to the growing demand for energy and the ongoing depletion of conventional resources,such as fossil fuels.Following thi...Around the world,there has been a notable shift toward the use of renewable energy technology due to the growing demand for energy and the ongoing depletion of conventional resources,such as fossil fuels.Following this worldwide trend,Brunei’s government has initiated several strategic programs aimed at encouraging the establishment of energy from renewable sources in the nation’s energy mix.These initiatives are designed not only to support environmental sustainability but also to make energy from renewable sources increasingly competitive in comparison to more conventional energy sources like gas and oil,which have historically dominated Brunei’s energy market.The optimization of a hybrid energy system that combines diesel generators,solar photovoltaic(PV)panels,and the national power grid is the focus of this study.The objective is to identify the most cost-effective and environmentally sustainable configuration that can reliably meet local energy demands.During optimization,several configuration was tried and tested,including only grid,PV and Grid and PV-generator.HOMER(Hybrid Optimization of Multiple Energy Resources)software,a popular simulation tool that makes it possible to simulate and analyze hybrid energy systems,is utilized in the optimization process.Inside the HOMER Pro optimization,various system configuration is taken into account for the optimization.While simulating,it takes into account different combinations of components such as solar panels,wind turbines and batteries.Later on,it is being ranked by different factors such as net present cost(NPC),Cost of Energy(COE),etc.A comprehensive techno-economic research is carried out to evaluate various system configurations,considering key performance indicators such as total energy generation cost,operational expenditure,and greenhouse gas emissions.The results provide valuable insights into how renewable-based hybrid systems can reduce environmental impact while maintaining economic viability,supporting Brunei’s broader goals of energy diversification and sustainability.The study also emphasizes how such hybrid systems could be scaled for off-grid and rural populations in Brunei,where a dependable electricity supply is still a problem.Furthermore,sensitivity analyses were performed to evaluate the effects of variations in solar irradiation,load demand,and fuel prices on the overall system performance.Policymakers and energy planners can use these insights to help them make data-driven decisions about future investments in infrastructure for renewable energy.展开更多
BACKGROUND Urolithiasisposes challenges in patients with chronic kidney disease(CKD),necessitating careful consideration of surgical interventions due to potential complications.AIM To assess the safety,feasibility,an...BACKGROUND Urolithiasisposes challenges in patients with chronic kidney disease(CKD),necessitating careful consideration of surgical interventions due to potential complications.AIM To assess the safety,feasibility,and efficacy of surgical interventions for urolithiasis in CKD patients.METHODS Systematic review adhering to PRISMA guidelines.Comprehensive searches of PubMed,Scopus,Cochrane Library,Web of Science,and Embase were conducted for studies published from January 2014 to June 2024.Studies involving adult patients(≥18 years)with CKD undergoing surgical interventions for urolithiasis,including randomized controlled trials,cohort studies,case-control studies,and observational studies.Studies involving pediatric patients,those not specifically addressing CKD patients,review articles,commentaries,and editorials.Despite an extensive search,only six studies met the strict inclusion criteria,reflecting the limited available data on this topic.This limitation has been acknowledged and discussed.RESULTS A total of 6 studies met the inclusion criteria,encompassing a diverse range of surgical interventions such as percutaneous nephrolithotomy(PCNL),ureteroscopy(URS),and extracorporeal shock wave lithotripsy(ESWL).Perioperative and postoperative complications varied across studies,with bleeding,infection,and acute kidney injury being the most common.The risk of complications was higher in patients with advanced CKD.Technical success rates were generally high,but feasibility was influenced by patientspecific factors such as CKD stage and comorbidities.Modifications to standard surgical techniques were often necessary.Stone-free rates and recurrence rates varied,with PCNL generally achieving higher stone-free rates compared to URS and ESWL.Long-term outcomes on renal function were inconsistent,highlighting the need for individualized treatment plans.CONCLUSION Surgical interventions for urolithiasis in CKD patients are associated with significant risks but can be effective in achieving stone clearance and symptom relief.The safety,feasibility,and efficacy of these interventions depend on patient-specific factors,necessitating a tailored approach.Further high-quality studies are needed to develop standardized guidelines and improve clinical outcomes in this complex patient population.展开更多
Bangladesh has achieved notable progress in expanding electricity access nationwide.Nonetheless,remote and topographically challenging regions such as the Chittagong Hill Tracts(CHT)continue to face coverage gaps due ...Bangladesh has achieved notable progress in expanding electricity access nationwide.Nonetheless,remote and topographically challenging regions such as the Chittagong Hill Tracts(CHT)continue to face coverage gaps due to grid extension difficulties.This research investigates the technical feasibility of micro-hydro power(MHP)systems as viable off-grid solutions for rural electrification in CHT.Field surveys conducted across various sites assessed available head and flow rates using GPS-based elevation measurements and portable flowmeters.Seasonal fluctuations were factored into the analysis to ensure year-round operational viability.The study involved estimating power output,selecting appropriate turbine types based on head-flow data,and proposing preliminary plant configurations.Results identify multiple locations with adequate head(2.5 to 10.4 m)and flow rates(0.10 to 0.35 m3/s),capable of generating between 1.5 and 16.5 kW,sufficient for essential rural applications.Based on site-specific head and discharge characteristics,Kaplan and Francis turbines were identified as the most suitable configurations,offering high efficiency for the medium-flow,low-to-medium head environments typical of the studied regions.Despite inherent technical potential,challenges such as seasonal variability,infrastructure complexities,and policy deficiencies remain.This investigation addresses a critical knowledge gap in local renewable energy planning.It offers a data-driven foundation for pilot projects and community-scale electrification initiatives in Bangladesh’s remote mountainous areas.展开更多
With the extending scale of agricultural production,the treatment and utilization of waste have become increasingly serious environmental problem.Taking city garden and Zhongnan pasture in Pujiang Town of Minhang Dist...With the extending scale of agricultural production,the treatment and utilization of waste have become increasingly serious environmental problem.Taking city garden and Zhongnan pasture in Pujiang Town of Minhang District in Shanghai for example,according to the analysis on discharge characteristic of waste and balance of resources and energy utilization,mixed anaerobic digestion was chosen to dispose waste based on government guidance and feasibility analysis of project,and the combining disposal and resource utilization of waste were realized in two enterprises,providing reference for close cases.展开更多
The functional bamboos are defined as the ones artificially selected, cultivated and produced in the special functions. Based on the principles to broaden market and maximize benefits, the directional cultivation of t...The functional bamboos are defined as the ones artificially selected, cultivated and produced in the special functions. Based on the principles to broaden market and maximize benefits, the directional cultivation of the functional bamboos has effectively been used bio-techniques and directionally to breed and cultivate bamboo cultivars to meet human＇s needs. The functional bamboos should feature stability, excellent quality and convenient production as well as easy duplication. The functional bamboo cultivars should also enhance the scientization, standardization industrialization and mass production. Given no negative environmental impact, ou purpose is to select, cultivate and develop one or more functional bamboos cultivars to meet the consumers＇ material and spiritual needs and bring more economic ben efits for the producers. The authors believe that directionally breeding functiona bamboo cultivars is not only feasible in techniques, resources and policies, but also in economy and market development. This implicates great significance for the green economic development given the features of China＇s natural resources.展开更多
基金Supported by the Natural Science Foundation of Guangxi Province(Grant Nos.2023GXNSFAA026067,2024GXN SFAA010521)the National Natural Science Foundation of China(Nos.12361079,12201149,12261026).
文摘Convex feasibility problems are widely used in image reconstruction, sparse signal recovery, and other areas. This paper is devoted to considering a class of convex feasibility problem arising from sparse signal recovery. We first derive the projection formulas for a vector onto the feasible sets. The centralized circumcentered-reflection method is designed to solve the convex feasibility problem. Some numerical experiments demonstrate the feasibility and effectiveness of the proposed algorithm, showing superior performance compared to conventional alternating projection methods.
文摘Objectives This study aimed to design and evaluate a detection system for the accidental dislodgement of head-and-neck medical supplies through hand position recognition and tracking in Intensive Care Unit(ICU)patients.Methods We conducted a single-center,prospective,parallel-group feasibility randomized controlled trial.We recruited 80 participants using convenience sampling from the ICU of a hospital in Ningbo City,Zhejiang Province,between March 2025 and June 2025,and they were randomly assigned to either the control group(routine care)or the intervention group(routine care plus image recognition-based detection system).The system continuously tracked patients’hand positions via bedside cameras and generated real-time alarms when hands entered predefined risk zones,notifying on-duty nurses to enable early intervention.System stability was assessed by continuous system uptime;system performance and clinical feasibility were evaluated by the frequencies of risk actions and accidental dislodgement of medical supplies(ADMS).Results All 80 participants completed the intervention,with 40 patients in each group.The baseline characteristics and median observation time of the two groups were balanced(intervention group:48 h/patient vs.control group:49 h/patient).Compared with the control group,the intervention group showed fewer ADMS(2/40 vs.9/40)and detected more risk actions per 100 h(36 vs.25);all system-detected events had corroborating images with complete concordance on manual review,and all nurse-recorded hand-contact events were accurately captured.Conclusions The study demonstrated that the image recognition-based detection system can function stably in clinical settings,providing accurate and continuous surveillance while supporting the early detection of risk actions.By reducing the observation burden and offering real-time cognitive support,the system complements routine nursing care and serves as an additional safety measure in ICU practice.With further optimization and larger multicenter validation,this approach could have the potential to make a significant contribution to the development of smart ICUs and the broader digital transformation of nursing care.
文摘BACKGROUND Clinical decision-making in urinary tract infections depends heavily on accurately distinguishing between pathogenic and non-pathogenic organisms.The interpretation of urine culture results is influenced by proper sample collection,the patient's clinical context,and organism-specific characteristics.However,there is currently no definitive method to determine whether a urinary isolate is truly pathogenic.This distinction is critical,as treatment decisions hinge on it.This pioneering study systematically applies a stepwise model to differentiate pathogenic from non-pathogenic urinary isolates—an approach not previously described.AIM To determine whether a urinary isolate is pathogenic(commensal,colonizer,or direct pathogen)or non-pathogenic(commensal,colonizer,or contaminant)using a structured,stepwise approach.METHODS This prospective,longitudinal,exploratory study was conducted over 24 months,starting in January 2022,at All India Institute of Medical Sciences Rishikesh,following approval from the Institutional Ethics Committee.A stepwise model developed by the investigators was applied to assess the nature of the isolates.Data recorded using REDCap,and analysis was performed using SPSS Version 25.RESULTS A total of 275 consecutive patients aged over 18 years with positive urine cultures—initially treated with antibiotics based on microbiological and clinical assessment—were included.The stepwise model classified 90.54% of cases as pathogenic(commensals:61.81%,colonizers:14.18%,and direct pathogens:14.54%)and 9.45% as non-pathogenic.The model showed that there could be a significant reduction in average hospital stay by over 13 days,along with saving approximately Rs.981 per patient in antibiotic costs in non-pathogenic cohort.CONCLUSION This novel model identified that approximately one in ten urinary isolates,initially considered pathogenic and treated with antibiotics,were in fact non-pathogenic.The model is safe,feasible,and potentially valuable in resource-limited settings,warranting broader validation and implementation.
文摘Sites and landscapes of international geological significance are managed with a comprehensive approach of conservation,education,and sustainable development in UNESCO Global Geoparks,which comprise a single,cohesive geographic area.A growing number of people are adopting the bottom-up strategy,which involves local communities and combines sustainable development with conservation.The viability of creating a UNESCO-recognized geopark in Kutch is assessed in this study.This study examines the key geoheritage features of the Kutch region,explores the socio-economic prospects of a geopark through geotourism and community development,and evaluates its conformity with UNESCO’s Global Geopark criteria on conservation,education,and sustainability.The study also evaluates the overall feasibility of the project,its economic,social,and environmental implications,and the adequacy of the requisite infrastructure..Its geological,cultural,and historical significance,as well as socioeconomic and environmental factors,are the parameters considered for investigation.Despite multiple applications to UNESCO,the Gujarat region of Kutch,which is rich in geological,cultural,and historical elements,is not recognised as a World Heritage Site.In actuality,there are 195 geoparks in 48 nations worldwide as of 2023,however India does not have one.The findings of the study provide critical insights that can direct initiatives to establish India’s first geopark and promote regional sustainability.
文摘Chronic obstructive pulmonary disease(COPD)is a common chronic respiratory disease that severely affects patients’quality of life.Current clinical treatments primarily rely on medication,with limited rehabilitation options and uncertain efficacy.Home-based exercise rehabilitation,as a non-pharmacological therapy,can promote the improvement of respiratory muscle function and cardiopulmonary endurance,exerting a positive preventive effect on COPD.However,due to factors such as the home environment and lack of health knowledge,COPD patients face numerous difficulties in accepting home-based exercise rehabilitation.This article reviews domestic and international research on the feasibility and effectiveness of home-based exercise rehabilitation for COPD,aiming to provide references for medical workers to better implement home-based exercise rehabilitation for COPD,assist patients in performing rehabilitation exercises at home,improve their quality of life,reduce hospitalization rates,and lower medical costs.
文摘Dear Editor,Robot-assisted partial nephrectomy(RAPN)has become the preferred surgical treatment for most renal tumors[1].Local recurrences occur in 1%-10% of patients undergoing partial nephrectomy,and they tend to appear within the first 5 years after surgery[2].
基金funded through Deanship of Scientific Research at Northern Border University,Arar,Saudi Arabia—project number“NBU-FFR-2025-3623-06”.
文摘Around the world,there has been a notable shift toward the use of renewable energy technology due to the growing demand for energy and the ongoing depletion of conventional resources,such as fossil fuels.Following this worldwide trend,Brunei’s government has initiated several strategic programs aimed at encouraging the establishment of energy from renewable sources in the nation’s energy mix.These initiatives are designed not only to support environmental sustainability but also to make energy from renewable sources increasingly competitive in comparison to more conventional energy sources like gas and oil,which have historically dominated Brunei’s energy market.The optimization of a hybrid energy system that combines diesel generators,solar photovoltaic(PV)panels,and the national power grid is the focus of this study.The objective is to identify the most cost-effective and environmentally sustainable configuration that can reliably meet local energy demands.During optimization,several configuration was tried and tested,including only grid,PV and Grid and PV-generator.HOMER(Hybrid Optimization of Multiple Energy Resources)software,a popular simulation tool that makes it possible to simulate and analyze hybrid energy systems,is utilized in the optimization process.Inside the HOMER Pro optimization,various system configuration is taken into account for the optimization.While simulating,it takes into account different combinations of components such as solar panels,wind turbines and batteries.Later on,it is being ranked by different factors such as net present cost(NPC),Cost of Energy(COE),etc.A comprehensive techno-economic research is carried out to evaluate various system configurations,considering key performance indicators such as total energy generation cost,operational expenditure,and greenhouse gas emissions.The results provide valuable insights into how renewable-based hybrid systems can reduce environmental impact while maintaining economic viability,supporting Brunei’s broader goals of energy diversification and sustainability.The study also emphasizes how such hybrid systems could be scaled for off-grid and rural populations in Brunei,where a dependable electricity supply is still a problem.Furthermore,sensitivity analyses were performed to evaluate the effects of variations in solar irradiation,load demand,and fuel prices on the overall system performance.Policymakers and energy planners can use these insights to help them make data-driven decisions about future investments in infrastructure for renewable energy.
文摘BACKGROUND Urolithiasisposes challenges in patients with chronic kidney disease(CKD),necessitating careful consideration of surgical interventions due to potential complications.AIM To assess the safety,feasibility,and efficacy of surgical interventions for urolithiasis in CKD patients.METHODS Systematic review adhering to PRISMA guidelines.Comprehensive searches of PubMed,Scopus,Cochrane Library,Web of Science,and Embase were conducted for studies published from January 2014 to June 2024.Studies involving adult patients(≥18 years)with CKD undergoing surgical interventions for urolithiasis,including randomized controlled trials,cohort studies,case-control studies,and observational studies.Studies involving pediatric patients,those not specifically addressing CKD patients,review articles,commentaries,and editorials.Despite an extensive search,only six studies met the strict inclusion criteria,reflecting the limited available data on this topic.This limitation has been acknowledged and discussed.RESULTS A total of 6 studies met the inclusion criteria,encompassing a diverse range of surgical interventions such as percutaneous nephrolithotomy(PCNL),ureteroscopy(URS),and extracorporeal shock wave lithotripsy(ESWL).Perioperative and postoperative complications varied across studies,with bleeding,infection,and acute kidney injury being the most common.The risk of complications was higher in patients with advanced CKD.Technical success rates were generally high,but feasibility was influenced by patientspecific factors such as CKD stage and comorbidities.Modifications to standard surgical techniques were often necessary.Stone-free rates and recurrence rates varied,with PCNL generally achieving higher stone-free rates compared to URS and ESWL.Long-term outcomes on renal function were inconsistent,highlighting the need for individualized treatment plans.CONCLUSION Surgical interventions for urolithiasis in CKD patients are associated with significant risks but can be effective in achieving stone clearance and symptom relief.The safety,feasibility,and efficacy of these interventions depend on patient-specific factors,necessitating a tailored approach.Further high-quality studies are needed to develop standardized guidelines and improve clinical outcomes in this complex patient population.
文摘Bangladesh has achieved notable progress in expanding electricity access nationwide.Nonetheless,remote and topographically challenging regions such as the Chittagong Hill Tracts(CHT)continue to face coverage gaps due to grid extension difficulties.This research investigates the technical feasibility of micro-hydro power(MHP)systems as viable off-grid solutions for rural electrification in CHT.Field surveys conducted across various sites assessed available head and flow rates using GPS-based elevation measurements and portable flowmeters.Seasonal fluctuations were factored into the analysis to ensure year-round operational viability.The study involved estimating power output,selecting appropriate turbine types based on head-flow data,and proposing preliminary plant configurations.Results identify multiple locations with adequate head(2.5 to 10.4 m)and flow rates(0.10 to 0.35 m3/s),capable of generating between 1.5 and 16.5 kW,sufficient for essential rural applications.Based on site-specific head and discharge characteristics,Kaplan and Francis turbines were identified as the most suitable configurations,offering high efficiency for the medium-flow,low-to-medium head environments typical of the studied regions.Despite inherent technical potential,challenges such as seasonal variability,infrastructure complexities,and policy deficiencies remain.This investigation addresses a critical knowledge gap in local renewable energy planning.It offers a data-driven foundation for pilot projects and community-scale electrification initiatives in Bangladesh’s remote mountainous areas.
基金Supported by Science and Technology Planning Project of Science Committee Science Committee(08DZ1980902)~~
文摘With the extending scale of agricultural production,the treatment and utilization of waste have become increasingly serious environmental problem.Taking city garden and Zhongnan pasture in Pujiang Town of Minhang District in Shanghai for example,according to the analysis on discharge characteristic of waste and balance of resources and energy utilization,mixed anaerobic digestion was chosen to dispose waste based on government guidance and feasibility analysis of project,and the combining disposal and resource utilization of waste were realized in two enterprises,providing reference for close cases.
基金Supported by Special International Bamboo Research Cooperation Program of Southwest Flower InstituteResearch Institute of Forestry Chinese Academy of Forestry(ICPB-2014-006)~~
文摘The functional bamboos are defined as the ones artificially selected, cultivated and produced in the special functions. Based on the principles to broaden market and maximize benefits, the directional cultivation of the functional bamboos has effectively been used bio-techniques and directionally to breed and cultivate bamboo cultivars to meet human＇s needs. The functional bamboos should feature stability, excellent quality and convenient production as well as easy duplication. The functional bamboo cultivars should also enhance the scientization, standardization industrialization and mass production. Given no negative environmental impact, ou purpose is to select, cultivate and develop one or more functional bamboos cultivars to meet the consumers＇ material and spiritual needs and bring more economic ben efits for the producers. The authors believe that directionally breeding functiona bamboo cultivars is not only feasible in techniques, resources and policies, but also in economy and market development. This implicates great significance for the green economic development given the features of China＇s natural resources.
