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In order to study the energy conservation mechanism of the EHPS (Electric Hydraulic Power Steering), this paper builds an EHPS system experimental platform, including the master control platform, the test system module, the steering resistance hydraulic loading module and the EHPS system energy consumption. Based on the test of the energy consumption of the above major components, key factors influencing the energy consumption of the EHPS system is studied. Test results suggest that the non-steering and low-steering demands of the EPHS system have a huge influence on the overall energy consumption of the EHPS system. These research findings are of guiding significance to the development of new-type energy-saving EHPS system. [ABSTRACT FROM AUTHOR]

An efficient ruthenium(II)-catalyzed oxidative annulation reaction of various arylimidazolium salts with alkynes via N-heterocyclic carbene-directed C--H activation to obtain substituted benzo[ ij]imidazo[2,1,5-de]quinolizinium salts is reported. This catalytic reaction proceeds in an excellent regioselective manner when using unsymmetrical alkynes as reactants. The intermediate mono-annulated products can be obtained by reducing the amount of catalyst. Two catalytically competent Nheterocyclic carbene-based cyclometallated ruthenium( II) complexes have been isolated and characterized, which represent the key intermediates in the catalytic cycle. Moreover, most of the products show a strong fluorescent property, indicating their potential for making new light-emitting materials. [ABSTRACT FROM AUTHOR]

This paper studies the stability and anti-interference performance of the EHPS system of the pure electric bus, analyzes the influence of the disturbance of road excitation and the sensor's noise measurement on system performance, combines the traditional PD control algorithm and the H8 control theory and applies it to the research of steering control system and design of the controller. The computer simulation results suggest that EHPS system of pure electric bus designed boasts good stability, and can effectively inhibit the influence of the disturbance of high-frequency road excitation and the measurement noise of the torque sensor on the system. [ABSTRACT FROM AUTHOR]

As the bus front wheel distance is relatively large, the requirements of electro-hydraulic power steering (EHPS) system are very high, and there is still light and clever contradiction. It is very necessary to select the appropriate motor power output for the stability of EHPS under different conditions. The EHPS system of bus was analyzed by DC motor feedback control system, a mathematical model of the system was established in a modular idea. With the LabVIEW software as the platform, the simulation model of DC motor feedback control system, which included the PID control algorithm and the system disturbance, was established, the calculation examples were gave out and the simulation analysis was performed. It was found that tuning the parameters of PID controller when considering system reference inputs and disturbances on control system performance, could directly and quickly design the algorithm for EHPS DC motor feedback control, of which performance was excellent and robustness is strong. [ABSTRACT FROM AUTHOR]

In order to adapt to the Hydraulic power assist characteristic and the change of power consumption of the bus with the change of the front axle load caused by hydraulic power characteristics, the paper describes the EHPS system's development and application. Introduced the mathematical model of EHPS system is established, and the power assist characteristic of EPS system, analyzed the types and characteristics of the power assist characteristic curves, the mathematical model of the electric hydraulic power steering system of the electric bus is established, and constructed the electronic control hydraulic power steering system (EHPS) to improve the steering portability and energy saving. This paper also studied the design of the fuzzy controller for the power assisted target, meeting the requirement of low speed and energy saving of vehicle. Through the simulation results, it shows that the control strategy is reasonable, providing the theoretical basis for the EHPS system which has good performance on the pure electric bus. [ABSTRACT FROM AUTHOR]

The article presents chemical equations related to the article "Rhodium(III)-Catalyzed Intermolecular Amidation with Azides via C(sp3)?H Functionalization" by N. Wang, R. Li, and others, published in the periodical "Journal of Organic Chemistry" in 2014.

Methods that can simultaneously install multiple different functional groups to heteroarenes via C-H functionalizations are valuable for complex molecule synthesis, which, however, remain challenging to realize. Here we report the development of vicinal di-carbo-functionalization of indoles in a site- and regioselective manner, enabled by the palladium/norbornene (Pd/NBE) cooperative catalysis. The reaction is initiated by the Pd(II)-mediated C3-metalation and specifically promoted by the C1-substituted NBEs. The mild, scalable, and robust reaction conditions allow for a good substrate scope and excellent functional group tolerance. The resulting C2-arylated C3-alkenylated indoles can be converted to diverse synthetically useful scaffolds. The combined experimental and computational mechanistic study reveals the unique role of the C1-substituted NBE in accelerating the turnover-limiting oxidative addition step., (© 2023 The Authors. Angewandte Chemie International Edition published by Wiley-VCH GmbH.)

Objective: To observe the effectiveness of the combination of dynamic and static stability in the treatment of old knee medial collateral ligament injury., Methods: Between March 2004 and June 2008, 26 cases of old knee medial collateral ligament injury were treated, including 19 males and 7 females with a mean age of 38 years (range, 21-48 years). Injury was caused by traffic accident in 6 cases, by sprains in 12 cases, by falling from height in 8 cases. The location was left knee in 15 cases and right knee in 11 cases. Of them, 24 patients showed the positive result of knee valgus test, 2 cases showed slightly relaxed knee tendon. The knee X-ray films of valgus stress position showed that the medial joint space differences between both knees were 3-5 mm in 2 cases and 5-12 mm in 24 cases. The injuries included avulsion of the medial femoral condyle starting point in 19 cases, central laceration in 6 cases, and tibial point laceration concomitant meniscus injury in 1 case. The time from injury to hospitalization was 3-14 months (mean, 6.4 months). Gracilis muscle was used to repair knee medial collateral ligament and the sartorius muscle transfer to reconstruct the medial rotation of knee stability function., Results: All incisions healed by first intention. No joint infection, deep vein thrombosis, or other postoperative complications occurred. Twenty-six cases were followed up 12-58 months with an average of 30 months. The results of knee valgus stress test were negative with no joint tenderness. At 3 months after operation, the knee X-ray films of valgus stress position showed the medial joint space differences between both knees were less than 1 mm. According to the modified Lysholm-Scale score, the results were excellent in 18 cases, good in 7 cases, and fair in 1 case with an excellent and good rate of 96% at last follow-up., Conclusion: A combination of dynamic and static stability in repairing old knee medial collateral ligament injury is easy-to-operate and has the advantages to perform the operation in the same incision, so it can avoid the shortcomings of single repair method and achieve better effectiveness.