The Q345 plate steel austenite recrystallization behavior and strain accumulation during rolling were investigated through thermal simulation and rolling. The effect of the recrystallization behavior on the microstruc...The Q345 plate steel austenite recrystallization behavior and strain accumulation during rolling were investigated through thermal simulation and rolling. The effect of the recrystallization behavior on the microstructure and properties of the steel was discussed and analyzed. The control principles of the pass reduction in the austenite recrystallization region and partial recrystallization region were established. It is found that to increase the thickness of intermediate billet in the finish temperature interval of 880-820℃ is favorable to grain refinement. The result has been applied to the industrial production of the 3 500 mm plate mill of Shougang Group. The average grain size of the steel plate conforms to ASTM No. 10-12, and the grade of band structure has been reduced to below 1.5.展开更多
目的:探讨光子嫩肤仪联合调Q激光治疗黄褐斑的近远期疗效。方法:选取2018年1月-2020年1月笔者科室确诊的118例女性黄褐斑患者,采用简单随机分组法分为观察组和对照组,每组59例。对照组采用调Q激光治疗,每月1次,共治疗6个月;观察组在对...目的:探讨光子嫩肤仪联合调Q激光治疗黄褐斑的近远期疗效。方法:选取2018年1月-2020年1月笔者科室确诊的118例女性黄褐斑患者,采用简单随机分组法分为观察组和对照组,每组59例。对照组采用调Q激光治疗,每月1次,共治疗6个月;观察组在对照组基础上联合光子嫩肤仪治疗,其中光子嫩肤使用频率为每2个月1次。对比两组患者的疗效,采用SOFT5.5皮肤检测仪对治疗前后皮肤性质进行检测,采用VISIA皮肤分析仪评估棕色斑特征计数,计算其下降率;对比治疗前后患者面部黄褐斑皮损面积与严重程度指数(Melasma area severity index,MASI)评分,记录两组治疗期间面部潮红、轻度水肿、灼痛感等不良反应发生情况;随访12个月,记录两组患者治疗后6个月、9个月、12个月的复发率。结果:治疗后,观察组有效率为96.61%,高于对照组的83.05%(P<0.05);治疗后,观察组色素斑、纹理、皱纹、毛孔及紫质评分均低于对照组(P<0.05);且观察组皮肤水分、弹性评分高于对照组,pH值、油脂评分低于对照组(P<0.05);治疗后,观察组棕色斑计数下降率显著高于对照组,观察组MASI评分显著低于对照组,差异均有统计学意义(P<0.05);治疗期间,两组不良反应发生率比较差异无统计学意义(P>0.05);随访12个月发现,观察组复发率显著低于对照组,差异有统计学意义(P<0.05)。结论:光子嫩肤仪联合调Q激光治疗黄褐斑疗效显著,皮损改善明显,复发率低,值得临床推广应用。展开更多
优化营商环境降低了微观主体投资调整成本,改变了宏观经济政策运行的微观环境。构建具有微观基础的宏观NKQ-DSGE(New Keynesian with Tobin s Q-Dynamic Stochastic General Equilibrium)模型,研究“营商环境优化”对“财政政策提效”...优化营商环境降低了微观主体投资调整成本,改变了宏观经济政策运行的微观环境。构建具有微观基础的宏观NKQ-DSGE(New Keynesian with Tobin s Q-Dynamic Stochastic General Equilibrium)模型,研究“营商环境优化”对“财政政策提效”的影响。研究发现:优化营商环境会降低投资调整成本,从而增强政策的托宾Q效应,但对积极财政政策而言是一把双刃剑;对于财政支出政策和降低消费税政策,优化营商环境会加剧政策对私人投资的挤出效应,从而降低政策乘数和弱化政策效果;对于降低资本税政策和降低劳动税政策,优化营商环境会提升政策对私人投资的促进效应,从而提高政策乘数和强化政策效果。因此,应偏向于使用乘数较大的政策工具,同时政策工具之间应协调配合,实现财政政策从“加力”向“提效”转型。展开更多
A new multi-channel motional Stark effect(MSE)diagnostic system has been developed on the upgraded EAST tokamak,which was installed on the port C to observe a tangential neutral beam.A telecentric imaging lens was dep...A new multi-channel motional Stark effect(MSE)diagnostic system has been developed on the upgraded EAST tokamak,which was installed on the port C to observe a tangential neutral beam.A telecentric imaging lens was deployed to ensure uniform illumination from the core to the boundary.A square fiber head which contained 23 fiber bundles was mounted to this imaging lens;each fiber bundle contained 19 fibers and two of them were assigned to CXRS and BES spectrometer,respectively.The angle tuning method was used for matching the Doppler shift of theσcomponent’s wavelength which was caused by the beam voltage.At the present stage,the MSE system only contains ten channels that would be extended to 23 channels in the future,covering a measurement range from R=1.8 to R=2.27 m with a temporal resolution of 10 ms and a spatial resolution of3 cm.The polarization angle-constrained q profiles and current density profiles were reconstructed with EFIT equilibrium reconstructions.In the sawtooth discharges,the q=1 surface position was validated by the ECE signals,which further verified the rationality of the MSE measurement.展开更多
Q-methodology was introduced more than 80 years ago to study subjective topics such as attitudes, perceptions, preferences, and feelings and there has not been much change in its statistical components since then. In ...Q-methodology was introduced more than 80 years ago to study subjective topics such as attitudes, perceptions, preferences, and feelings and there has not been much change in its statistical components since then. In Q-methodology, subjective topics are studied using a combination of qualitative and quantitative techniques. It involves development of a sample of statements and rank-ordering these statements by study participants using a grid known as Q-sort table. After completion of Q-sort tables by the participants, a by-person factor analysis (i.e., the factor analysis is performed on persons, not variables or traits) is used to analyze the data. Therefore, each factor represents a group of individuals with similar views, feelings, or preferences about the topic of the study. Then, each group (factor) is usually described by a set of statements, called distinguishing statements, or statements with high or low factor scores. In this article, we review one important statistical issue, i.e. the criteria for identifying distinguishing statements and provide a review of its mathematical calculation and statistical background. We show that the current approach for identifying distinguishing statements has no sound basis, which may result in erroneous findings and seems to be appropriate only when there are repeated evaluations of Q-sample from the same subjects. However, most Q-studies include independent subjects with no repeated evaluation. Finally, a new approach is suggested for identifying distinguishing statements based on Cohen’s effect size. We demonstrate the application of this new formula by applying the current and the suggested methods on a Q-dataset and explain the differences.展开更多
文摘The Q345 plate steel austenite recrystallization behavior and strain accumulation during rolling were investigated through thermal simulation and rolling. The effect of the recrystallization behavior on the microstructure and properties of the steel was discussed and analyzed. The control principles of the pass reduction in the austenite recrystallization region and partial recrystallization region were established. It is found that to increase the thickness of intermediate billet in the finish temperature interval of 880-820℃ is favorable to grain refinement. The result has been applied to the industrial production of the 3 500 mm plate mill of Shougang Group. The average grain size of the steel plate conforms to ASTM No. 10-12, and the grade of band structure has been reduced to below 1.5.
文摘目的:探讨光子嫩肤仪联合调Q激光治疗黄褐斑的近远期疗效。方法:选取2018年1月-2020年1月笔者科室确诊的118例女性黄褐斑患者,采用简单随机分组法分为观察组和对照组,每组59例。对照组采用调Q激光治疗,每月1次,共治疗6个月;观察组在对照组基础上联合光子嫩肤仪治疗,其中光子嫩肤使用频率为每2个月1次。对比两组患者的疗效,采用SOFT5.5皮肤检测仪对治疗前后皮肤性质进行检测,采用VISIA皮肤分析仪评估棕色斑特征计数,计算其下降率;对比治疗前后患者面部黄褐斑皮损面积与严重程度指数(Melasma area severity index,MASI)评分,记录两组治疗期间面部潮红、轻度水肿、灼痛感等不良反应发生情况;随访12个月,记录两组患者治疗后6个月、9个月、12个月的复发率。结果:治疗后,观察组有效率为96.61%,高于对照组的83.05%(P<0.05);治疗后,观察组色素斑、纹理、皱纹、毛孔及紫质评分均低于对照组(P<0.05);且观察组皮肤水分、弹性评分高于对照组,pH值、油脂评分低于对照组(P<0.05);治疗后,观察组棕色斑计数下降率显著高于对照组,观察组MASI评分显著低于对照组,差异均有统计学意义(P<0.05);治疗期间,两组不良反应发生率比较差异无统计学意义(P>0.05);随访12个月发现,观察组复发率显著低于对照组,差异有统计学意义(P<0.05)。结论:光子嫩肤仪联合调Q激光治疗黄褐斑疗效显著,皮损改善明显,复发率低,值得临床推广应用。
文摘优化营商环境降低了微观主体投资调整成本,改变了宏观经济政策运行的微观环境。构建具有微观基础的宏观NKQ-DSGE(New Keynesian with Tobin s Q-Dynamic Stochastic General Equilibrium)模型,研究“营商环境优化”对“财政政策提效”的影响。研究发现:优化营商环境会降低投资调整成本,从而增强政策的托宾Q效应,但对积极财政政策而言是一把双刃剑;对于财政支出政策和降低消费税政策,优化营商环境会加剧政策对私人投资的挤出效应,从而降低政策乘数和弱化政策效果;对于降低资本税政策和降低劳动税政策,优化营商环境会提升政策对私人投资的促进效应,从而提高政策乘数和强化政策效果。因此,应偏向于使用乘数较大的政策工具,同时政策工具之间应协调配合,实现财政政策从“加力”向“提效”转型。
基金supported by the National MCF Energy R&D Program of China(No.2019YFE03040000)National Natural Science Foundation of China(Nos.12075280 and 11805236)+2 种基金Anhui Provincial Natural Science Foundation(No.1908085J01)CAS President’s International Fellowship Initiative(No.2022VMB0007)Comprehensive Research Facility for Fusion Technology Program of China(No.2018-000052-73-01-001228)。
文摘A new multi-channel motional Stark effect(MSE)diagnostic system has been developed on the upgraded EAST tokamak,which was installed on the port C to observe a tangential neutral beam.A telecentric imaging lens was deployed to ensure uniform illumination from the core to the boundary.A square fiber head which contained 23 fiber bundles was mounted to this imaging lens;each fiber bundle contained 19 fibers and two of them were assigned to CXRS and BES spectrometer,respectively.The angle tuning method was used for matching the Doppler shift of theσcomponent’s wavelength which was caused by the beam voltage.At the present stage,the MSE system only contains ten channels that would be extended to 23 channels in the future,covering a measurement range from R=1.8 to R=2.27 m with a temporal resolution of 10 ms and a spatial resolution of3 cm.The polarization angle-constrained q profiles and current density profiles were reconstructed with EFIT equilibrium reconstructions.In the sawtooth discharges,the q=1 surface position was validated by the ECE signals,which further verified the rationality of the MSE measurement.
文摘Q-methodology was introduced more than 80 years ago to study subjective topics such as attitudes, perceptions, preferences, and feelings and there has not been much change in its statistical components since then. In Q-methodology, subjective topics are studied using a combination of qualitative and quantitative techniques. It involves development of a sample of statements and rank-ordering these statements by study participants using a grid known as Q-sort table. After completion of Q-sort tables by the participants, a by-person factor analysis (i.e., the factor analysis is performed on persons, not variables or traits) is used to analyze the data. Therefore, each factor represents a group of individuals with similar views, feelings, or preferences about the topic of the study. Then, each group (factor) is usually described by a set of statements, called distinguishing statements, or statements with high or low factor scores. In this article, we review one important statistical issue, i.e. the criteria for identifying distinguishing statements and provide a review of its mathematical calculation and statistical background. We show that the current approach for identifying distinguishing statements has no sound basis, which may result in erroneous findings and seems to be appropriate only when there are repeated evaluations of Q-sample from the same subjects. However, most Q-studies include independent subjects with no repeated evaluation. Finally, a new approach is suggested for identifying distinguishing statements based on Cohen’s effect size. We demonstrate the application of this new formula by applying the current and the suggested methods on a Q-dataset and explain the differences.
