Due to the impact of voltage,temperature and device aging,the traditional ring oscillator-based physical unclonable functions(RO-PUF)suffers from a unreliability issue,i.e.,PUF output is subject to a constant change.T...Due to the impact of voltage,temperature and device aging,the traditional ring oscillator-based physical unclonable functions(RO-PUF)suffers from a unreliability issue,i.e.,PUF output is subject to a constant change.To improve the reliability of the PUF,a stability test scheme related to the PUF mapping unit is proposed.The scheme uses ring oscillators with multiple complexity and various frequencies as sources of interference,which are placed near the PUF prototype circuit to interfere with it.By identifying and discarding unstable slices whichlead to t e instability of PUF,PUF reliability can be effectively improved.Experimental results show that surrounding logic circuits with multiple complexity and multiple frequencies can identify different unstable slices,a d the higher the complexity,t e more unstable slices are detected.Moreover,compared with newly published PUF literature,t e PUF cicuit possesses better statistical characteristic of randomness and lower resource consumption.W it temperatures varying from 0 to 120 t and voltage fluctuating between 0.85 and 1.2 V,its uniqueness and stability can achieve 49.78%a d 98.00%,respectively,which makes it better for use in t e field of security.展开更多
目的探讨预防自杀的认知行为治疗对自杀未遂抑郁症患者的疗效。方法纳入2021年9月至2022年8月北京回龙观医院住院的自杀未遂抑郁症患者112例,采取随机数字表区组随机化法将患者分为干预组和对照组,干预组给予12次预防自杀的认知行为治疗...目的探讨预防自杀的认知行为治疗对自杀未遂抑郁症患者的疗效。方法纳入2021年9月至2022年8月北京回龙观医院住院的自杀未遂抑郁症患者112例,采取随机数字表区组随机化法将患者分为干预组和对照组,干预组给予12次预防自杀的认知行为治疗,对照组给予相同时间和频次的支持性心理治疗,分别在基线和治疗4周后、治疗结束和随访时(第4、8、12周末),采用患者健康问卷抑郁量表(Patient Health Questionnaire Depression Scale,PHQ-9)和贝克自杀意念量表中文版(Beck Scale for Suicide Ideation-Chinese Version,BSI-CV)评估患者抑郁症状、自杀意念和自杀倾向的变化。2组间一般资料及量表评分比较采用t检验、Mann-Whitney秩和检验、χ^(2)检验比较,采用重复测量方差分析对各结局指标的组间和时间效应进行分析。结果2组PHQ-9评分各时点变化均为下降趋势,且组别和时间交互作用有统计学意义(F=2.75,P=0.047)。自第8周起干预组PHQ-9评分低于对照组差异有统计学意义(t=4.95,P<0.05)。2组间BSI-CV最近1周自杀意念总分时间效应和组别效应均有统计学意义(F=96.78、6.35,均P<0.05),但组别和时间交互作用不显著;干预组评分在第8周和第12周时低于对照组差异有统计学意义(Z=-3.11、-3.30,均P<0.01)。2组间BSI-CV最近1周自杀倾向总分时间效应有统计学意义(F=11.83,P<0.05),组别和时间交互作用无统计学意义(F=2.56,P=0.059),组别效应无统计学意义(F=0.001,P=0.975);随时间变化2组第4、8、12周时BSI-CV最近1周自杀倾向总分均低于基线,组内差异比较均有统计学意义。结论预防自杀的认知行为治疗对自杀未遂抑郁症患者抑郁症状和自杀意念的干预效果均优于一般支持性心理治疗,而对自杀倾向干预效果不明显。展开更多
基金The National Natural Science Foundation of China(No.61674048,61371025,61574052,61604001)
文摘Due to the impact of voltage,temperature and device aging,the traditional ring oscillator-based physical unclonable functions(RO-PUF)suffers from a unreliability issue,i.e.,PUF output is subject to a constant change.To improve the reliability of the PUF,a stability test scheme related to the PUF mapping unit is proposed.The scheme uses ring oscillators with multiple complexity and various frequencies as sources of interference,which are placed near the PUF prototype circuit to interfere with it.By identifying and discarding unstable slices whichlead to t e instability of PUF,PUF reliability can be effectively improved.Experimental results show that surrounding logic circuits with multiple complexity and multiple frequencies can identify different unstable slices,a d the higher the complexity,t e more unstable slices are detected.Moreover,compared with newly published PUF literature,t e PUF cicuit possesses better statistical characteristic of randomness and lower resource consumption.W it temperatures varying from 0 to 120 t and voltage fluctuating between 0.85 and 1.2 V,its uniqueness and stability can achieve 49.78%a d 98.00%,respectively,which makes it better for use in t e field of security.
文摘目的探讨预防自杀的认知行为治疗对自杀未遂抑郁症患者的疗效。方法纳入2021年9月至2022年8月北京回龙观医院住院的自杀未遂抑郁症患者112例,采取随机数字表区组随机化法将患者分为干预组和对照组,干预组给予12次预防自杀的认知行为治疗,对照组给予相同时间和频次的支持性心理治疗,分别在基线和治疗4周后、治疗结束和随访时(第4、8、12周末),采用患者健康问卷抑郁量表(Patient Health Questionnaire Depression Scale,PHQ-9)和贝克自杀意念量表中文版(Beck Scale for Suicide Ideation-Chinese Version,BSI-CV)评估患者抑郁症状、自杀意念和自杀倾向的变化。2组间一般资料及量表评分比较采用t检验、Mann-Whitney秩和检验、χ^(2)检验比较,采用重复测量方差分析对各结局指标的组间和时间效应进行分析。结果2组PHQ-9评分各时点变化均为下降趋势,且组别和时间交互作用有统计学意义(F=2.75,P=0.047)。自第8周起干预组PHQ-9评分低于对照组差异有统计学意义(t=4.95,P<0.05)。2组间BSI-CV最近1周自杀意念总分时间效应和组别效应均有统计学意义(F=96.78、6.35,均P<0.05),但组别和时间交互作用不显著;干预组评分在第8周和第12周时低于对照组差异有统计学意义(Z=-3.11、-3.30,均P<0.01)。2组间BSI-CV最近1周自杀倾向总分时间效应有统计学意义(F=11.83,P<0.05),组别和时间交互作用无统计学意义(F=2.56,P=0.059),组别效应无统计学意义(F=0.001,P=0.975);随时间变化2组第4、8、12周时BSI-CV最近1周自杀倾向总分均低于基线,组内差异比较均有统计学意义。结论预防自杀的认知行为治疗对自杀未遂抑郁症患者抑郁症状和自杀意念的干预效果均优于一般支持性心理治疗,而对自杀倾向干预效果不明显。
