Subjects: Medicine, Pharmacy >> Preventive Medicine and Hygienics submitted time 2023-07-05 Cooperative journals: 《中国全科医学》
Abstract： Background In recent years，the incidence of non-specific low back pain has been increasing. The duration of conventional treatment is short，and the symptoms tend to rebound，which has a great impact on the body and mind of patients. Objective To investigate the effectiveness of backward walking based on anti-gravity treadmill training system combined with conventional low back core training on patients with non-specific low back pain. Methods A total of 40 patients with non-specific low back pain admitted to the rehabilitation department of Zhongshan Hospital，Fudan University from July to December 2022 were divided into the experimental group （20 cases） and control group （20 cases） according to the random number table method. The control group received conventional low back core training，and the experimental group received backward walking based on anti-gravity treadmill training system on the basis of the control group. The oswestry disability index （ODI），visual analogue scale（VAS） and back pain classification scale（BPS） of the 2 groups were evaluated before and 4 weeks after treatment，respectively. Results There was no significant difference in ODI，VAS and BPS scores between the two groups before treatment （P>0.05）; after 4 weeks of treatment，ODI，VAS and BPS scores of the 2 groups were decreased，and ODI，VAS and BPS scores of the experimental group were significantly lower than those of the control group（P<0.05）; the difference in the change of each score before and after treatment between the two groups was statistically significant （P<0.05）. Conclusion The backward walking based on anti-gravity treadmill training system is effective in improving the pain level and overall status of the low back in patients with non-specific low back pain，which is worthy of clinical promotion.
Subjects: Materials Science >> Materials Science (General) submitted time 2023-03-31 Cooperative journals: 《腐蚀科学与防护技术》
Abstract： Effect of the addition amount of CaO (0, 0.1% 0.5% and 0.9% (mass fraction) respectively) on the microstructure and corrosion resistance of AZ81 Mg-alloy was studied by means of scanning electron microscopy, XRD, static mass loss and electrochemical measurement. The results show that: when the CaO amount was 0.5%, the grains of the alloy are refined obviously; the alloy is mainly composed of α-Mg matrix and Mg17Al12 phase and there are also new phases Al2Ca and Mg2Ca generated in the alloy; along with the increase amount of CaO addition the corrosion rate of AZ81 Mg-alloy in 3.5%NaCl solution increases firstly and then decreases, while the free corrosion potential rises firstly and then falls, in the contrast the free corrosion current density of the alloy reduces firstly and then rises; when the addition amount of CaO was 0.5% the free corrosion rate and corrosion current density of the alloy are the smallest and the corrosion potential is the highest, therefore, the alloy possesses the best corrosion resistance property.
Subjects: Materials Science >> Materials Science (General) submitted time 2023-03-31 Cooperative journals: 《腐蚀科学与防护技术》
Abstract： none
Subjects: Library Science，Information Science >> Information Science submitted time 2017-11-08 Cooperative journals: 《数据分析与知识发现》
Abstract：【目的】探讨协同创新环境下知识型团队的交互对团队绩效的影响。【方法】采用多智能体建模仿真方法, 从知识管理微观层面构建知识供需系统, 将时间成本和资金成本作为工作绩效的评价指标, 基于 Python NetworkX 实现该系统。【结果】大规模的组织在降低创新成本上比小规模的组织有优势; 无标度结构的组织完 成任务耗时长并且成本高; 组织中个体的连接邻域数增加并没有单调地提升组织的创新效率, 当平均领域数超 过某个阈值后创新成本开始增加。 【局限】未考虑人与人之间的互动在协同创新中的优化设置。【结论】基于多 智能体建模的知识供需系统从微观层面对知识型团队的知识整合过程进行模拟, 有助于认识团队内部知识的管 理, 为组织提升知识利用效率, 降低创新成本提供新的视角。
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