Search

Objective To explore the effects of virtual reality (VR) technology combined with targeted functional training on postoperative patients with intracerebral hemorrhage (ICH). Methods A total of 130 postoperative ICH patients admitted to the hospital from September 2020 to September 2023 were selected and randomly divided into the observation group and the control group by randomized numerical table method, with 65 patients in each group. The control group was treated with conventional rehabilitation, and the observation group was given VR technology combined with targeted functional training on the basis of conventional treatment. The scores of Neurological Impairment Scale(NIHSS), Barthel Index (BI), Fugl-Meyer Scale (FMA), Rehabilitation Activity, Comprehensive Quality of Life Questionnaire(GQOLI-74), and the rehabilitation effects were compared between the two groups. Results The rehabilitation effect of the observation group was better than that of the control group, and the difference was statistically significant (P<0.05). Comparison of NIHSS, BI, FMA, motivation for rehabilitation and GQOLI-74 scores before treatment between the two groups showed no statistically significant differences (P>0.05). After treatment, the NIHSS, BI, FMA, rehabilitation treatment positivity and GQOLI-74 scores of the two groups were better than before treatment, and the observation group was better than the control group, and the differences were statistically significant(P<0.05). Conclusion The combination of VR technology and targeted functional training can effectively improve the effect of rehabilitation therapy and enthusiasm of rehabilitation therapy in postoperative ICH patients, and promote the recovery of limb function. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Harbin Institute of Technology. Social Sciences Edition / Haerbin Gongye Daxue Xuebao. Shehui Kexue Ban is the property of Harbin Institute of Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Harbin Institute of Technology. Social Sciences Edition / Haerbin Gongye Daxue Xuebao. Shehui Kexue Ban is the property of Harbin Institute of Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Harbin Institute of Technology. Social Sciences Edition / Haerbin Gongye Daxue Xuebao. Shehui Kexue Ban is the property of Harbin Institute of Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

After entering deep mine, with the influence of high stress and strong disturbance, various failure modes such as breaking, shearing and compaction yielding are symbiotic in rock mass, the characteristics of nonlinear behavior are obvious, and rock failure mode is transformed in various failure mechanisms. It is necessary to analyze the influence of the intermediate principal stress on the strength theory of deep rocks and rock masses. Based on the Paul-Mohr-Coulomb (PMC) failure criteria, considering the transformation of rock failure mode of porous rock and the pore collapse characteristics, the Back-Paul-Mohr-Coulomb (BPMC) model for characterizing the compression-shear yielding under high stress is proposed. Representation method of the friction angle envelope are derived. According to the piecewise linear principle, a 12-sided BPMC linear failure criterion is obtained in the p-q plane. Based on the transformation relationship between the stress invariants in the p-q plane, the parameters of the model features are obtained with the least-square method. In order to verify the rationality of the PMC & BPMC criterion and the corresponding failure mode transformation theory, a PMC & BPMC model is fitted and compared with the experimental data. Sichuan sandstone and Jinchuan marble are used for high-pressure triaxial compression tests with the portable self-sealing rock triaxial test high pressure chamber system. Fitting the experimental data, the obtained damage envelope and the experimental data have a good fitting degree. The Sichuan yellow sandstone has a shear stress peak inflection point after the confining pressure reaches 90 MPa, resulting in pore collapse type damage, which is the compaction yielding. Experiments are conducted to study the rock failure characteristics and strength characteristics under different confining pressures. The results show that the PMC & BPMC model can predict the cap yield surface of porous rock and the transition of rock failure mode from shear failure to compaction yielding, which can predict the failure strength under different confining pressures. [ABSTRACT FROM AUTHOR]

The nonlinear characteristics of rock mass become increasingly prominent with the increase of depth, and its mechanical parameters can be accurately measured and monitored in real-time, which provides a necessary basis for rock mass change characteristics and stress monitoring in the process of in-situ stress relief. At present, however, rock mechanics parameter measurement is mostly based on laboratory mechanics test. Timeliness and fitting method will bring errors to test results. Conventional coupled ultrasonic transmitting and receiving probes have high requirements for the flatness of the contact surface, so it is impossible to achieve long-term monitoring in the field borehole. Based on the dry-coupled point-contact acoustic probe velocity measurement technology, through the design of acoustic emission and reception probes, the stability of the circuit board and the research of denoising algorithm, a digital wave velocity acquisition system with instantaneous acquisition and wireless transmission functions has been developed. Based on the same area taken from the scene processing 50 mm×100 mm granite rock and ground stress relieve core, the laboratory mechanics test and the determination of wave velocity were conducted, respectively, to obtain corresponding static and dynamic modulus of elasticity. The results show that firstly, the self-developed acoustic velocity acquisition system based on dry coupling point-contact has a good adaptability to different working contact surfaces, and the data error is within the allowable range of the specification. Secondly, for rock samples with the same lithology and different scales and forms in the same region, the dynamic and static elastic modulus relationship is applicable to each other. This provides a basis for calculating the dynamic elastic modulus of rock mass based on dry coupling point-contact acoustic velocity measurement and calculating its static elastic modulus. Furthermore, based on the digital acquisition system of dry-coupled point-contact acoustic velocity measurement, it is feasible to collect and analyze the dynamic and static mechanical parameters of rock mass in real time during the process of in-situ stress core relief and long-term monitoring of rock mass. [ABSTRACT FROM AUTHOR]