Background: Age-related cognitive and physical decline can impair safe driving performance. Tai Chi exercise benefits cognitive and physical function and may influence safe driving performance in older adults. The pri...Background: Age-related cognitive and physical decline can impair safe driving performance. Tai Chi exercise benefits cognitive and physical function and may influence safe driving performance in older adults. The primary aim of this observational study was to compare cognitive processes and physical function related to safe driving performance among older adult Tai Chi practitioners to normative reference values.Secondary aims were to examine relationships between Tai Chi exercise habits, cognitive processes, and physical function related to safe driving performance and to explore potential predictors of safe driving performance.Methods: The Driving Health Inventory, the Driving Scenes Test, other driving-related cognitive and physical measures, and self-reported measures including the Mindful Attention Awareness Scale(MAAS) and the Vitality Plus Scale(VPS) were collected from current Tai Chi practitioners(n = 58; age 72.9 ± 5.9 years, mean ± SD) with median >3 years Tai Chi practice.Results: Compared to normative reference values, participants performed better on numerous cognitive measures including the Driving Scenes Test(p < 0.001, d = 1.63), maze navigation(p = 0.017, d = 0.27), the Useful Field of View Test(p < 0.001, r = 0.15), and on physical measures including the Rapid Walk Test(p < 0.001, r = 0.20), and the Right Foot Tapping Test,(p < 0.001, r = 0.35). Participants scored higher than normative reference values on MAAS and VPS(p < 0.001, d = 0.75; p = 0.002, d = 0.38, respectively). Statistically significant correlations were found between several study measures. The digit span backward test was the strongest predictor of safe driving performance(β = 0.34,p = 0.009).Conclusion: Tai Chi exercise has the potential to impact cognitive processes and physical function related to safe driving performance. Further study using randomized controlled trials, structured Tai Chi exercise doses, and driving simulator or on-road driving performance as outcome measures are warranted.展开更多
目的:观察连续肾替代治疗(CRRT)加用不同剂量血必净对脓毒症合并急性肾损伤(AKI)患者的影响及安全性。方法:选取2012年6月-2015年8月我院ICU的脓毒症合并AKI患者104例。按照随机数字表法将其分为小、中、大剂量组和对照组,各26例。4组...目的:观察连续肾替代治疗(CRRT)加用不同剂量血必净对脓毒症合并急性肾损伤(AKI)患者的影响及安全性。方法:选取2012年6月-2015年8月我院ICU的脓毒症合并AKI患者104例。按照随机数字表法将其分为小、中、大剂量组和对照组,各26例。4组患者均给予基础治疗;小剂量组患者给予血必净注射液50 m L加入0.9%氯化钠注射液(NS)100 m L中,ivgtt,bid;中剂量组患者给予血必净注射液100 m L加入NS 100 m L中,ivgtt,bid;大剂量组患者给予血必净注射液100 m L加入NS 100 m L中,ivgtt,qid。4组患者均治疗1周。观察4组患者治疗前后血清白细胞介素6(IL-6)、肿瘤坏死因子α(TNF-α)、和超敏C反应蛋白(hs-CRP)等炎症因子水平,血尿素氮(BUN)、血肌酐(SCr)和胱抑素(Cys C)等肾功能指标水平,凝血酶原时间(PT)、部分活化凝血活酶时间(APTT)和纤维蛋白原(Fib)等凝血功能指标水平,急性生理与慢性健康状况评分系统Ⅱ(APACHEⅡ)、多器官功能障碍评分系统(Marshall)评分,并记录治疗过程中不良反应发生情况。结果:脱落9例后,本研究最终纳入统计的合格病例数95例,小、中、大剂量组和对照组分别为23、24、25、23例。治疗前,4组患者上述指标比较,差异均无统计学意义(P>0.05)。治疗后,4组患者血清IL-6、TNF-α、CRP、PT、APTT水平和APACEⅡ及Marshall评分均明显降低/缩短,血清BUN、SCr、Cys C、Fib水平均明显升高,小、中、大剂量组患者上述指标改善均明显优于对照组,大剂量组明显优于小、中剂量组,差异均有统计学意义(P<0.05)。4组患者不良反应发生率比较,差异无统计学意义(P>0.05)。结论:CRRT加用大剂量血必净可显著抑制脓毒症合并AKI患者的炎症反应,改善肾功能和凝血功能,且不增加不良反应发生风险。展开更多
The short-range wireless communication technology has advanced considerably and provides the feasibility of train-train(T2T)communication link in the communication-based train control system.The introduction of the T2...The short-range wireless communication technology has advanced considerably and provides the feasibility of train-train(T2T)communication link in the communication-based train control system.The introduction of the T2T link would reduce the headway and improve operational efficiency.Formal methods are system design techniques that use rigorously specified mathematical models to ensure all behaviors work as expected.And it is exactly the functional safety verification needed.Therefore,to deal with the functional safety verification of the T2T link,an untimed colored petri net model is first constructed.Secondly,the verification process is performed.Conclusions can be drawn from the state space report and the computation tree logic queries.Lastly,the model is parameterized,and then data log files are obtained for further performance measurement.Results show that the proposed criteria are satisfied and there are no defects in the basic design requirements.The transmission delay has considered the reconnection,transmission errors and the interruption.The probability of the delay lower than 150 ms accounts for 98.106%,which meets the specification and the previous field test.展开更多
Overall purpose of a power uprate and lifetime extension project （PLEX） is to modernize the power station cost-efficiently resulting in fulfilling the following overall requirements. The primary target is to meet th...Overall purpose of a power uprate and lifetime extension project （PLEX） is to modernize the power station cost-efficiently resulting in fulfilling the following overall requirements. The primary target is to meet the requirements provided by the local regulations from the regulatory offices. The controlling, monitoring and power supply of safety functions have to comply with these regulations. Any deviations from the existing safety analysis report （SAR） have to be corrected. On top of the safety measures the general technical status should be raised to extend the lifetime to 60 years. A high availability during the modernization has to be assured.展开更多
Objective:The aim of this study was to investigate renal insufficiency in patients with chemotherapy.Methods:Prescribing chemotherapy in a regular hemodialysis patient with renal failure,and monitoring of serum drug c...Objective:The aim of this study was to investigate renal insufficiency in patients with chemotherapy.Methods:Prescribing chemotherapy in a regular hemodialysis patient with renal failure,and monitoring of serum drug concentrations to determine its safety and effectiveness.Results:Chemotherapy assessment efficiency:SD(better),hemodialysis did not affect THP treatment,their safety was guaranteed.Conclusion:The chemotherapy of renal dysfunction is not an absolute contraindication to fully assess the patient's adverse effects and tolerability,the reasonable arrangements for hemodialysis and the timing of administration can be safe and effective chemotherapy.展开更多
Small modular reactors(SMRs) are beneficial in providing electricity power safely and viable for specific applications such as seawater desalination and heat production. Due to its inherent safety feature, the modular...Small modular reactors(SMRs) are beneficial in providing electricity power safely and viable for specific applications such as seawater desalination and heat production. Due to its inherent safety feature, the modular high temperature gas-cooled reactor(MHTGR) is considered as one of the best candidates for SMR-based nuclear power plants. Since its dynamics presents high nonlinearity and parameter uncertainty, it is necessary to develop adaptive power-level control, which is beneficial to safe, stable, and efficient operation of MHTGR and is easy to be implemented. In this paper, based on the physically-based control design approach, an adaptive outputfeedback power-level control is proposed for MHTGRs. This control can guarantee globally bounded closedloop stability and has a simple form. Numerical simulation results show the correctness of the theoretical analysis and satisfactory regulation performance of this control.展开更多
Cloud computing is currently an embryonic domain in the area of information technology that possesses the power of transforming the way information technology （IT） services are delivered and maintained in the busine...Cloud computing is currently an embryonic domain in the area of information technology that possesses the power of transforming the way information technology （IT） services are delivered and maintained in the business world. Pay as per the usage kind of cost structure coupled with delivery of computing services through internet makes cloud computing an exciting and potential growth oriented information technology model compared with conventional computing services delivery models. Various additional features like scalability, flexibility and easy deployment process creates a window for the organizations even relatively smaller in size to get benefitted by the highly advanced ＆ modern technologies without incurring substantial cost. In spite of so many benefits of this new delivery model, concerns are beginning to grow about how safe an environment it is. Despite of all the hype surrounding the cloud, enterprise customers are still reluctant to deploy their business in the cloud. Security is one of the major issues which reduces the growth of cloud computing and complications with data privacy and data protection continue to plague the market. Other related concerns associated with the adoption of cloud computing include trust on service providers, loss of control and compliance issues. This paper is an attempt to explore security ＆ trust issues linked with cloud computing adoption in the Small and Medium Enterprises （SME） sector.展开更多
The issue of CCF （common cause failure） in digital I ＆ C （instrumentation and control） systems is of great interest because an increasing number of such systems are implemented in nuclear power plants. For the mi...The issue of CCF （common cause failure） in digital I ＆ C （instrumentation and control） systems is of great interest because an increasing number of such systems are implemented in nuclear power plants. For the mitigation of ATWS （anticipated transients without scram） as well as CCF within the PPS （plant protection system） and the ESF-CCS （engineered safety feature-component control system）, the ADPS （advanced diverse protection system） has been developed by KEPCO E ＆ C （KEPCO Engineering and Construction） Company for new nuclear units in Korea. As compared to the DPS （diverse protection system） design of APR1400, the ADPS has a diverse safety injection function considering a LBLOCA （large break loss of coolant accident） concurrent with the CCF of the PPS and ESF-CCS. Besides the function of SIAS （safety injection actuation signal） initiation, several CCF avoidance features, such as the changes of software design classification, communication methods, equipment platform, and man-machine interfaces, are introduced to enhance the reliability of the ADPS. In addition, the ADPS has recently incorporated four redundant channels with 2-out-of-4 voting logics to enhance its fault tolerant capability. Therefore, it is expected that the ADPS can provide an enhanced reliability regarding possible CCFs in the safety-grade digital I ＆ C systems as well as the ADPS itself.展开更多
基金supported,in part, by the Lange Doctoral Dissertation Research Award, College of Nursing, University of Arizona
文摘Background: Age-related cognitive and physical decline can impair safe driving performance. Tai Chi exercise benefits cognitive and physical function and may influence safe driving performance in older adults. The primary aim of this observational study was to compare cognitive processes and physical function related to safe driving performance among older adult Tai Chi practitioners to normative reference values.Secondary aims were to examine relationships between Tai Chi exercise habits, cognitive processes, and physical function related to safe driving performance and to explore potential predictors of safe driving performance.Methods: The Driving Health Inventory, the Driving Scenes Test, other driving-related cognitive and physical measures, and self-reported measures including the Mindful Attention Awareness Scale(MAAS) and the Vitality Plus Scale(VPS) were collected from current Tai Chi practitioners(n = 58; age 72.9 ± 5.9 years, mean ± SD) with median >3 years Tai Chi practice.Results: Compared to normative reference values, participants performed better on numerous cognitive measures including the Driving Scenes Test(p < 0.001, d = 1.63), maze navigation(p = 0.017, d = 0.27), the Useful Field of View Test(p < 0.001, r = 0.15), and on physical measures including the Rapid Walk Test(p < 0.001, r = 0.20), and the Right Foot Tapping Test,(p < 0.001, r = 0.35). Participants scored higher than normative reference values on MAAS and VPS(p < 0.001, d = 0.75; p = 0.002, d = 0.38, respectively). Statistically significant correlations were found between several study measures. The digit span backward test was the strongest predictor of safe driving performance(β = 0.34,p = 0.009).Conclusion: Tai Chi exercise has the potential to impact cognitive processes and physical function related to safe driving performance. Further study using randomized controlled trials, structured Tai Chi exercise doses, and driving simulator or on-road driving performance as outcome measures are warranted.
文摘目的:观察连续肾替代治疗(CRRT)加用不同剂量血必净对脓毒症合并急性肾损伤(AKI)患者的影响及安全性。方法:选取2012年6月-2015年8月我院ICU的脓毒症合并AKI患者104例。按照随机数字表法将其分为小、中、大剂量组和对照组,各26例。4组患者均给予基础治疗;小剂量组患者给予血必净注射液50 m L加入0.9%氯化钠注射液(NS)100 m L中,ivgtt,bid;中剂量组患者给予血必净注射液100 m L加入NS 100 m L中,ivgtt,bid;大剂量组患者给予血必净注射液100 m L加入NS 100 m L中,ivgtt,qid。4组患者均治疗1周。观察4组患者治疗前后血清白细胞介素6(IL-6)、肿瘤坏死因子α(TNF-α)、和超敏C反应蛋白(hs-CRP)等炎症因子水平,血尿素氮(BUN)、血肌酐(SCr)和胱抑素(Cys C)等肾功能指标水平,凝血酶原时间(PT)、部分活化凝血活酶时间(APTT)和纤维蛋白原(Fib)等凝血功能指标水平,急性生理与慢性健康状况评分系统Ⅱ(APACHEⅡ)、多器官功能障碍评分系统(Marshall)评分,并记录治疗过程中不良反应发生情况。结果:脱落9例后,本研究最终纳入统计的合格病例数95例,小、中、大剂量组和对照组分别为23、24、25、23例。治疗前,4组患者上述指标比较,差异均无统计学意义(P>0.05)。治疗后,4组患者血清IL-6、TNF-α、CRP、PT、APTT水平和APACEⅡ及Marshall评分均明显降低/缩短,血清BUN、SCr、Cys C、Fib水平均明显升高,小、中、大剂量组患者上述指标改善均明显优于对照组,大剂量组明显优于小、中剂量组,差异均有统计学意义(P<0.05)。4组患者不良反应发生率比较,差异无统计学意义(P>0.05)。结论:CRRT加用大剂量血必净可显著抑制脓毒症合并AKI患者的炎症反应,改善肾功能和凝血功能,且不增加不良反应发生风险。
基金National Natural Science Foundation of China(No.61963023)。
文摘The short-range wireless communication technology has advanced considerably and provides the feasibility of train-train(T2T)communication link in the communication-based train control system.The introduction of the T2T link would reduce the headway and improve operational efficiency.Formal methods are system design techniques that use rigorously specified mathematical models to ensure all behaviors work as expected.And it is exactly the functional safety verification needed.Therefore,to deal with the functional safety verification of the T2T link,an untimed colored petri net model is first constructed.Secondly,the verification process is performed.Conclusions can be drawn from the state space report and the computation tree logic queries.Lastly,the model is parameterized,and then data log files are obtained for further performance measurement.Results show that the proposed criteria are satisfied and there are no defects in the basic design requirements.The transmission delay has considered the reconnection,transmission errors and the interruption.The probability of the delay lower than 150 ms accounts for 98.106%,which meets the specification and the previous field test.
文摘Overall purpose of a power uprate and lifetime extension project （PLEX） is to modernize the power station cost-efficiently resulting in fulfilling the following overall requirements. The primary target is to meet the requirements provided by the local regulations from the regulatory offices. The controlling, monitoring and power supply of safety functions have to comply with these regulations. Any deviations from the existing safety analysis report （SAR） have to be corrected. On top of the safety measures the general technical status should be raised to extend the lifetime to 60 years. A high availability during the modernization has to be assured.
文摘Objective:The aim of this study was to investigate renal insufficiency in patients with chemotherapy.Methods:Prescribing chemotherapy in a regular hemodialysis patient with renal failure,and monitoring of serum drug concentrations to determine its safety and effectiveness.Results:Chemotherapy assessment efficiency:SD(better),hemodialysis did not affect THP treatment,their safety was guaranteed.Conclusion:The chemotherapy of renal dysfunction is not an absolute contraindication to fully assess the patient's adverse effects and tolerability,the reasonable arrangements for hemodialysis and the timing of administration can be safe and effective chemotherapy.
文摘Small modular reactors(SMRs) are beneficial in providing electricity power safely and viable for specific applications such as seawater desalination and heat production. Due to its inherent safety feature, the modular high temperature gas-cooled reactor(MHTGR) is considered as one of the best candidates for SMR-based nuclear power plants. Since its dynamics presents high nonlinearity and parameter uncertainty, it is necessary to develop adaptive power-level control, which is beneficial to safe, stable, and efficient operation of MHTGR and is easy to be implemented. In this paper, based on the physically-based control design approach, an adaptive outputfeedback power-level control is proposed for MHTGRs. This control can guarantee globally bounded closedloop stability and has a simple form. Numerical simulation results show the correctness of the theoretical analysis and satisfactory regulation performance of this control.
文摘Cloud computing is currently an embryonic domain in the area of information technology that possesses the power of transforming the way information technology （IT） services are delivered and maintained in the business world. Pay as per the usage kind of cost structure coupled with delivery of computing services through internet makes cloud computing an exciting and potential growth oriented information technology model compared with conventional computing services delivery models. Various additional features like scalability, flexibility and easy deployment process creates a window for the organizations even relatively smaller in size to get benefitted by the highly advanced ＆ modern technologies without incurring substantial cost. In spite of so many benefits of this new delivery model, concerns are beginning to grow about how safe an environment it is. Despite of all the hype surrounding the cloud, enterprise customers are still reluctant to deploy their business in the cloud. Security is one of the major issues which reduces the growth of cloud computing and complications with data privacy and data protection continue to plague the market. Other related concerns associated with the adoption of cloud computing include trust on service providers, loss of control and compliance issues. This paper is an attempt to explore security ＆ trust issues linked with cloud computing adoption in the Small and Medium Enterprises （SME） sector.
文摘The issue of CCF （common cause failure） in digital I ＆ C （instrumentation and control） systems is of great interest because an increasing number of such systems are implemented in nuclear power plants. For the mitigation of ATWS （anticipated transients without scram） as well as CCF within the PPS （plant protection system） and the ESF-CCS （engineered safety feature-component control system）, the ADPS （advanced diverse protection system） has been developed by KEPCO E ＆ C （KEPCO Engineering and Construction） Company for new nuclear units in Korea. As compared to the DPS （diverse protection system） design of APR1400, the ADPS has a diverse safety injection function considering a LBLOCA （large break loss of coolant accident） concurrent with the CCF of the PPS and ESF-CCS. Besides the function of SIAS （safety injection actuation signal） initiation, several CCF avoidance features, such as the changes of software design classification, communication methods, equipment platform, and man-machine interfaces, are introduced to enhance the reliability of the ADPS. In addition, the ADPS has recently incorporated four redundant channels with 2-out-of-4 voting logics to enhance its fault tolerant capability. Therefore, it is expected that the ADPS can provide an enhanced reliability regarding possible CCFs in the safety-grade digital I ＆ C systems as well as the ADPS itself.
