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Objective: To explore the clinical intervention effect of applying Huoxue Jiangu Decoction in the treatment of patients with osteoarthritis. Methods: Research work was carried out in our hospital from December 2018 to December 2019. A total of 100 patients with osteoarthritis received treatment during this period were selected and divided into two groups using random number method. One group was given sodium hyaluronate injection for treatment, which was the control group, and the other group was given Huoxuejiangu Decoction combined with sodium hyaluronate injection, which was the experimental group. The clinical treatment of the two groups of patients was compared and analyzed. Results: The patients' pain levels were compared. There was no significant difference between the groups before the intervention treatment. After treatment, the experimental group score was (3.05±0.55), which was lower than the control group, the improvement effect was more significant, and the difference between the groups was significant (P< 0.05), the experimental group had a better effect. The clinical treatment of the two groups of patients was compared and analyzed. There was no significant difference in the WOMAS index between the two groups before treatment. After treatment, the score of the experimental group was (34.33±6.98), and the improvement rate was (37.45±13.22). After treatment, the score was lower and the improvement rate was higher, which was significantly higher than the control group (P

Objective: To study the effect of knee arthroscopy combined with Liuwei Gubi Pill on degenerative meniscus injury in middle-aged and elderly patients. Methods: A total of 92 middle-aged and elderly patients with degenerative meniscus injury who were treated in our hospital from August 2018 to February 2020 were collected. They were divided into two groups by envelope lottery. Knee arthroscopy was used for the reference group of 46 patients, and they were guided to perform joint function exercises after surgery; 46 patients in the experimental group took Liuwei Gubi Pill on the basis of the reference group, and compared the efficacy of the two groups. Results: The total effective rate of treatment in the experimental group was 97.83%, which was higher than the reference group’s 84.78%. The experimental group’s VAS score at 1st month, 2nd month, and 3rd month after surgery was lower than that in the reference group. The Lysholm score of the experimental group at 1st month, 2nd month, and 3rd month after operation was significantly higher than that of the reference group, and the data of the two groups was compared by P

The network real-time kinematic (RTK) technique uses continuously operating reference stations (CORS) within a geographic area to model the distance dependent errors, allowing users in the area to solve ambiguities. A key step in network RTK is to fix ambiguities between multiple reference stations. When a new satellite rises or when maintenance happens, many unknown parameters are involved in the mathematical model, and traditional methods take some time to estimate the integer ambiguities reliably. The purpose of this study is the single-epoch ambiguity resolution on small-scale CORS network with inter-station distance of around 50 km. A new differencing scheme is developed to explore the full potential of multi-frequency Global Navigation Satellite System (GNSS). In this scheme, a differencing operation is formed between satellites with the closest mapping functions. With the new differencing scheme, tropospheric error can be mostly neglected after the correction, as well as the double-differencing operation. Numerical tests based on two baselines of 49 km and 35 km show that the success rate of ambiguity resolution can reach more than 90%. The single-epoch ambiguity resolution for reference stations brings many benefits to the network RTK service, for example, the instantaneous recovery after maintenance or when a new satellite rises. [ABSTRACT FROM AUTHOR]

Conventional relative kinematic positioning is difficult to be applied in the polar region of Earth since there is a very sparse distribution of reference stations, while precise point positioning (PPP), using data of a stand-alone receiver, is recognized as a promising tool for obtaining reliable and accurate trajectories of moving platforms. However, PPP and its integer ambiguity fixing performance could be much degraded by satellite orbits and clocks of poor quality, such as those of the geostationary Earth orbit (GEO) satellites of the BeiDou navigation satellite system (BDS), because temporal variation of orbit errors cannot be fully absorbed by ambiguities. To overcome such problems, a network-based processing, referred to as precise orbit positioning (POP), in which the satellite clock offsets are estimated with fixed precise orbits, is implemented in this study. The POP approach is validated in comparison with PPP in terms of integer ambiguity fixing and trajectory accuracy. In a simulation test, multi-GNSS (global navigation satellite system) observations over 14 days from 136 globally distributed MGEX (the multi-GNSS Experiment) receivers are used and four of them on the coast of Antarctica are processed in kinematic mode as moving stations. The results show that POP can improve the ambiguity fixing of all system combinations and significant improvement is found in the solution with BDS, since its large orbit errors are reduced in an integrated adjustment with satellite clock offsets. The four-system GPS+GLONASS+Galileo+BDS (GREC) fixed solution enables the highest 3D position accuracy of about 3.0 cm compared to 4.3 cm of the GPS-only solution. Through a real flight experiment over Antarctica, it is also confirmed that POP ambiguity fixing performs better and thus can considerably speed up (re-)convergence and reduce most of the fluctuations in PPP solutions, since the continuous tracking time is short compared to that in other regions. [ABSTRACT FROM AUTHOR]