企业数字化转型路径及实践

随着信息技术环境日新月异,企业数字化转型已成为当下发展的必由之路。本文在已有研究的基础上,深入探讨了数字化转型的框架,指出重塑思维模式、IT架构和业务架构将成为企业数字化转型的重点内容,并以中国联通为例详细阐述了中国联通数字化转型的难点和基本路径,以期给同类型企业带来一定的参考与启示。

运动练功法治疗肩关节周围炎疗效的meta分析

目的本文通过meta分析的方法研究运动练功疗法对肩关节周围炎的治疗效果,以期获得更好的治疗结果。方法检索2012年1月至2022年3月中国知网、万方会议论文数据库、中文科学期刊全文数据库、中国生物学文章资料库、公共医学PubMed资料库、Ovid Technologies、Cochrane Library,筛选关于运动练功疗法治疗肩关节周围炎的文献。文献在筛选和质量评估后,使用RevMan 5.3软件进行meta分析。结果最终纳入21篇文献,研究组875例,试验组897例,共1754例均符合肩部周边炎的诊断标准。meta分析结果显示,运动练功疗法总有效率优于对照组,差异有统计学意义[RR=1.13,95%CI(1.08,1.19),P<0.00001];练功疗法改善患者的疼痛症状较对照组更为显著,差异有统计学意义[MD=2.32,95%CI(0.82,3.82),P=0.002];运动练功疗法提升肩功能活动度较对照组显著,差异有统计学意义[MD=10.62,95%CI(6.09,15.16),P<0.00001]。结论运动练功疗法在治疗肩周炎方面优于其他疗法。但目前尚未制订统一的疗效标准和临床指南,需收集更高质量样本及更客观指标,来进一步验证其疗效的稳定性。

Thermal Behavior, Non-isothermal Decomposition Reaction Kinetics of Copper(Ⅱ) Salt of 4-Hydroxy-3,5-dinitropyridine and Its Application in Propellant

The thermal behavior and kinetic parameters of the major exothermic decomposition reaction of the title compound in a temperature-programmed mode were studied by means of TG-DTG and DSC. The critical temperature of thermal explosion was calculated. The effect of the title compound on the combustion characteristic of composition modifier double base propellant containing RDX was explored with a strand burner. The results show that the kinetic model function in differential forms, the apparent activation energy(E a) and the pre-exponential factor(A) of the major exothermic decomposition reaction are 3(1-α)[-ln(1-α)] 2/3, 190.56 kJ/mol and 10 13.39 s -1, respectively. The critical temperature of thermal explosion of the compound is 353.08 ℃. The kinetic equation of the major exothermic decomposition process of the title compound at 0.1 MPa could be expressed as dα/dT=10 14.65(1-α)[-ln(1-α)] 2/3 e -2.2920×104/T. As an auxiliary catalyzer, the title compound can help the main catalyzer of lead salt of 4-hydroxy-3,5-dinitropyridine to accelerate the burning rate and reduce the pressure exponent of RDX-CMDB propellant.

Thermal Decomposition Kinetics of Lead 2,4,6-Trinitroresorcinate Monohydrate

The non-isothermal decomposition of lead 2,4,6-trinitroresorcinate monohydrate, Pb(TNR)·H\-2O, was investigated by means of TG-DTA, DSC and IR. The thermal decomposition mechanism and the dissociated kinetics were also investigated. The kinetic parameters were obtained from the analysis of the DSC curves by integral and differential methods. The most probable kinetic model function of the dehydration reaction of \{Pb(TNR)·H\-2O\} was suggested by the comparison of the kinetic parameters.

Kinetics and Mechanism of Exothermic First-stage Decomposition Reaction of 2,6-Bis(2,2,2-trinitroethyl)glycoluril

The thermal behavior, mechanism and kinetic parameters of the exothermic first-stage decomposition of the title compound in a temperature-programmed mode were investigated by means of DSC, TG-DTG and IR. The reaction mechanism was proposed. The kinetic model function in differential form, apparent activation energy(\%E\%\-a) and pre-exponential factor(\%A\%) of this reaction are (3/2)(1-\%α\%)\[-ln(1-\%α\%)\]\+\{1/3\}, 185\^52 kJ/mol and 10\+\{17\^78\} s\+\{-1\}, respectively. The critical temperature of the thermal explosion of the compound is 201\^30 ℃. The values of Δ\%S\%\+≠, Δ\%H\%\+≠ and Δ\%G\%\+≠ of this reaction are 72\^46 J/(mol· K), 175\^1 kJ/mol and 141\^50 kJ/mol, respectively.