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111.
Astashev M. G. Panfilov D. I. Rozhkov A. N. Petrov M. I. Rashitov P. A. Gorchakov A. V. 《Power Technology and Engineering (formerly Hydrotechnical Construction)》2021,55(4):625-632
Power Technology and Engineering - The paper presents the results of developing a high-speed semiconductor transformer voltage regulator (STVR) intended for a real-time voltage regulation of 0.4 kV... 相似文献
112.
V. Ya. Martenson 《Power Technology and Engineering (formerly Hydrotechnical Construction)》1990,24(8):500-503
1. | The number of hydraulic (including hydropower) structures in our country, the standard operating life of the mechanical equipment of which expired long ago, is considerably more than 100. It is necessary to immediately and seriously undertake their reconstruction and to update their mechanical equipment. |
2. | Timely and thorough preparation for reconstruction of structures and replacement (wherever this is necessary) of mechanical equipment will eliminate the negative effect of the reconstruction process on the structure and its functional characteristics while performing these works. |
3. | The use of a heavy-freight floating crane, despite the high cost of its rental for the time of replacing the mechanical equipment, is justified from the viewpoint of economy and quality of the works. |
113.
V. S. Shaitan D. V. Morozova 《Power Technology and Engineering (formerly Hydrotechnical Construction)》1989,23(12):699-703
1. | The use of the results of on-site investigations of an irregular wave load on slopes of structures makes it possible to increase the reliability of designing structures. |
2. | A differentiated consideration of the wave load according to probability in storms represented by corresponding quasi-steady wave systems can substantially reduce the cost of construction and installation works on objects of various classes and technical purposes. |
114.
V. A. Petrov 《Power Technology and Engineering (formerly Hydrotechnical Construction)》1989,23(5):258-261
1. | Despite their openness, transverse discontinuous structures have a jetty effect. |
2. | Discontinuous structures formed by two rows of rectangular support masses connected by longitudinal beams have the strongest effect on the dynamics of a pebble beach. |
3. | It can be recommended to use circular supports with a diameter of not more than 2 m arranged in one row at a distance of at least 6 m from one another for constructing hydraulic structures intersecting pebble beaches. |
115.
V. A. Ashikhmen V. G. Buchatskii N. V. Dmitriev L. I. Malyshev 《Power Technology and Engineering (formerly Hydrotechnical Construction)》1989,23(1):47-53
1. | The side curtains as necessary cutoff elements of the al-Qadisiyah hydro development were made in an optimal design variant, on time, and with a high quality. A considerable technical and economic effect was obtained by eliminating excessive volumes of works specified by the original design as a result of a combined analysis of the data of engineering surveys, investigations of experimental grouting works, and optimization of the grouting technology. |
2. | The index of unit cement absorption in the control holes used as the criterion of sufficiency of grouting on the side curtains should be used everywhere where the purpose of grouting works is to detect and eliminate large cavities and fissures. |
3. | Grouting works on elimination of karst cavities and large fissures, being in essence infill grouting, require the development of an industrial technology of the works with the use of considerable volumes of grouts (concretes) and use of a large number of machines and mechanisms (concrete plants, mixers, concrete pumps, etc.). |
116.
V. I. Istomin 《Power Technology and Engineering (formerly Hydrotechnical Construction)》1989,23(12):689-693
The use of the main methods of calculating Kc in practice guarantees an accuracy of the calculation within
相似文献
117.
V. G. Ivanov M. D. Timofeev Z. I. Solov'eva 《Power Technology and Engineering (formerly Hydrotechnical Construction)》1988,22(7):446-449
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