Tổng hợp tài liệu Kỹ Thuật - Công Nghệ tham khảo cho học sinh, sinh viên.
We conclude that for high speed transceiver logic interface of PN based optical transmitter the HSTL_ III_18 IO standard gives optimum performance in reduction of junction temperature, when operating at higher frequencies of 100GHz and 1000GHz. The results conclude that Energy-Efficient PN generator based optical transmitter is achieved for h...
5 trang | Chia sẻ: huongthu9 | Ngày: 12/08/2021 | Lượt xem: 632 | Lượt tải: 0
In this paper, we have proposed the multistep ahead prediction of electric power systems by using multiple Gaussian process models. The multistep ahead prediction has been carried out directly by using multiple Gaussian process models as every step ahead predictors. Through the numerical simulations for the simplified electric power system, i...
6 trang | Chia sẻ: huongthu9 | Ngày: 12/08/2021 | Lượt xem: 500 | Lượt tải: 0
Hydropower has a high proportion in the composition of Vietnam power system. This proportion tends to decrease, leading to a change in the working position of hydropower station. The diagram of power demand also changes in the direction of the disadvantage for hydropower. High demand for power occurs in the months when the capacity of the hydrop...
8 trang | Chia sẻ: huongthu9 | Ngày: 12/08/2021 | Lượt xem: 614 | Lượt tải: 0
Low pressure pumps (also known as “pump without discharge pipe”) which are vertical axial flow pumps with low total head and design head less than 3.0m were installed and tested at 15 locations in Hung Yen province. Three stations were selected and their investment cost, electrical consumption, noise and station design were compared with other p...
7 trang | Chia sẻ: huongthu9 | Ngày: 12/08/2021 | Lượt xem: 641 | Lượt tải: 0
This paper presents the analysis of voltage stability by using optimal power flow to out find domain power limitation in MATLAB/MATPOWER. By increasing the load, the PQ curve for each bus was drawn and then the domain increase power limit was identified. This method would be verified through IEEE2-9 bus simulation on MATLAB/ MATPOWER.
9 trang | Chia sẻ: huongthu9 | Ngày: 12/08/2021 | Lượt xem: 643 | Lượt tải: 0
Currently, steel gates are used for water intake and flood discharge in irrigation and hydropower projects. Gate seal are installed around the gates to prevent leakage from the upstream to dowstream due to the pressure of the water blocking the water seal into the slot. But this greatly increases the frictional force when opening and closing the...
4 trang | Chia sẻ: huongthu9 | Ngày: 12/08/2021 | Lượt xem: 608 | Lượt tải: 0
In this paper we have presented the first PTASs for the two non-linear Knapsack problems, Packing and Covering, which are motivated by applications in alternating current electrical systems. Since these two problems are NP-hard, the obtained PTASs are the best possible approximation algorithms, assuming that P 6= NP. Although the PTAS is of theo...
15 trang | Chia sẻ: huongthu9 | Ngày: 12/08/2021 | Lượt xem: 520 | Lượt tải: 0
Sau quá trình đo tham số và thử nghiệm trên thực địa tại phần đảo nổi của một số đảo san hô thuộc quần đảo Trường Sa cũng như khu vực Sơn Tây Hà Nội, máy TEC-2 đã thể hiện tính năng ưu việt về độ ổn định của kết quả đo, hiệu quả đo cũng như hiệu suất khảo sát của thiết bị tương tương với các sản cùng loại do Canada sản xuất [3]. Hệ thiết bị ...
7 trang | Chia sẻ: huongthu9 | Ngày: 12/08/2021 | Lượt xem: 587 | Lượt tải: 0
In this work, the control of the temperature profile of one-dimensional unstable heat conduction systems described by parabolic PDEs is presented. Indeed, the authors have shown: • how to discretize and write the original distributed parameter system dynamics into a PH representation using the finite difference method. • how to stabilize that ...
14 trang | Chia sẻ: huongthu9 | Ngày: 12/08/2021 | Lượt xem: 633 | Lượt tải: 0
The differential vibration equations, algorithms and program of linear stability analysis of piezoelectric composite plates under any dynamic load in the plane of the plate taking into account structural damping and piezoelectric damping have been formulated. The validation of the present formulation is carried out that provides the accuracy of ...
15 trang | Chia sẻ: huongthu9 | Ngày: 12/08/2021 | Lượt xem: 503 | Lượt tải: 0
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