WiFi speed test的問題,透過圖書和論文來找解法和答案更準確安心。 我們找到下列線上看、影評和彩蛋懶人包

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國立臺灣科技大學 電機工程系 蘇順豐、郭重顯所指導 Isak Martin Simbolon的 Integral Sliding Mode Control Optimization for Network-controlled Ball Balancing Platform (2021),提出WiFi speed test關鍵因素是什麼,來自於Ball Balancing System、Sliding Mode Control、Optimization Algorithm、Network Controlled Systems (NCS)。

而第二篇論文國立陽明交通大學 資訊科學與工程研究所 陳志成所指導 王嘉誠的 衛星失效區域定位方法 (2021),提出因為有 定位、導航、衛星失效區域、路層偵測、氣壓、磁指紋的重點而找出了 WiFi speed test的解答。

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Integral Sliding Mode Control Optimization for Network-controlled Ball Balancing Platform

為了解決WiFi speed test的問題,作者Isak Martin Simbolon 這樣論述:

This work proposes an optimization scheme for smooth, saturated integral sliding mode control in various types of network communication, including 5G-SA, 5G-NSA, WiFi-6, and experimental WiFi. First, the ball and plate model system is analyzed. Then, an integral sliding mode control with a smooth s

aturation function is designed, and the stability of the controller is analyzed. To optimize the parameter, the Bald Eagle Search (BES) algorithm is implemented by applying the Integral of Absolute Error (IAE), Integral of Squared Error (ISE), and Integral of Time multiplied by Absolute Error (ITAE)

objective functions to constant and stochastic time delays from network communications. The BES algorithm is compared with the Genetic Algorithm (GA) and Particle Swarm Optimizer (PSO) algorithms. The comparison results reveal that BES algorithm outperforms the other algorithms in terms of the conv

ergence rate and final objective function. To speed up the convergence rate and execution time, an accelerated-BES is proposed. The accelerated-BES is also compared with PSO and GA. Finally, the optimized controller is validated by simulations and experiments.

衛星失效區域定位方法

為了解決WiFi speed test的問題,作者王嘉誠 這樣論述:

Contents iList of Tables vList of Figures vi1 Introduction 12 Background and Related Works 32.1 Background . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32.1.1 Road layer determination . . . . . . . . . . . . . . . . . . . . . . . . . 32.1.2 Positioing in sheltered environ

ment . . . . . . . . . . . . . . . . . . . 62.2 Related Works . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82.2.1 Road layer determination . . . . . . . . . . . . . . . . . . . . . . . . . 82.2.2 Positioning in GNSS-denied environments . . . . . . . . . . . . . . . 122.2.3 M

agnetic field positioning . . . . . . . . . . . . . . . . . . . . . . . . 132.2.4 Algorithms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142.3 Challenges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163 Preliminary experiment toward various impact fac

tor 183.1 Barometric impact factor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183.1.1 Preliminary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183.1.2 Precision and accuracy of the air-pressure sensors in smartphones . . . 253.1.2.1 Static experiment . . . . . . . .

. . . . . . . . . . . . . . . 263.1.2.2 Dynamic experiment . . . . . . . . . . . . . . . . . . . . . 273.1.3 Impact of Weather . . . . . . . . . . . . . . . . . . . . . . . . . . . . 283.1.4 Impact of driving environment . . . . . . . . . . . . . . . . . . . . . . 313.1.4.1 External temperature eff

ect . . . . . . . . . . . . . . . . . . 313.1.4.2 Internal temperature effect . . . . . . . . . . . . . . . . . . . 323.1.4.3 Speed effect . . . . . . . . . . . . . . . . . . . . . . . . . . 333.1.4.4 Impact of surrounding vehicles . . . . . . . . . . . . . . . . 373.1.5 Impact of air conditioning .

. . . . . . . . . . . . . . . . . . . . . . . 383.1.6 The combination of all factors . . . . . . . . . . . . . . . . . . . . . . 393.2 Magnetic field impact factor . . . . . . . . . . . . . . . . . . . . . . . . . . . 403.2.1 Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. 403.2.1.1 Orientation . . . . . . . . . . . . . . . . . . . . . . . . . . . 403.2.1.2 Sensor drift . . . . . . . . . . . . . . . . . . . . . . . . . . 413.2.1.3 Smartphones . . . . . . . . . . . . . . . . . . . . . . . . . . 413.2.2 Vehicles . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . 433.2.2.1 Charging . . . . . . . . . . . . . . . . . . . . . . . . . . . . 433.2.2.2 In-car electrical appliances . . . . . . . . . . . . . . . . . . 443.2.2.3 Vehicle types . . . . . . . . . . . . . . . . . . . . . . . . . . 453.2.2.4 Nearby vehicles . . . . . . . . . . . . . . . . . .

. . . . . . 463.2.3 Magnetic field variations . . . . . . . . . . . . . . . . . . . . . . . . . 484 Proposed method in GNSS-denied environment 514.1 Proposed BARLD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 514.1.1 Database . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . 524.1.2 Algorithm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 524.1.3 Initial level determination . . . . . . . . . . . . . . . . . . . . . . . . 534.1.4 Multi-upper levels within the range d1 . . . . . . . . . . . . . . . . . . 544.1.4.1 Connected ramps or roads

are not parallel . . . . . . . . . . 544.1.4.2 Ramps are parallel but with a height difference . . . . . . . . 544.2 Proposed MVP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 554.2.1 Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 554.2.2 Positioning

speed (delay) . . . . . . . . . . . . . . . . . . . . . . . . . 574.2.3 Proposed MVP algorithm . . . . . . . . . . . . . . . . . . . . . . . . 584.2.4 Robustness to phone orientation . . . . . . . . . . . . . . . . . . . . . 604.2.5 Magnetic field map (ground truth) . . . . . . . . . . . . . . . .

. . . . 604.2.5.1 Algorithm . . . . . . . . . . . . . . . . . . . . . . . . . . . 614.2.5.2 Implementation . . . . . . . . . . . . . . . . . . . . . . . . 624.2.6 INS-based positioning system . . . . . . . . . . . . . . . . . . . . . . 635 Evaluation and Discussion 655.1 Road layer determination . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . 655.1.1 Threshold (δ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 665.1.2 Sampling rate (R) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 685.1.3 Activation Range (d1) . . . . . . . . . . . . . . . . . . . . . . . .

. . 705.1.4 Large-scale Road test . . . . . . . . . . . . . . . . . . . . . . . . . . . 725.2 Road tests in different tunnels . . . . . . . . . . . . . . . . . . . . . . . . . . 735.2.1 Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73iii5.2.2 Lane determination . . . .

. . . . . . . . . . . . . . . . . . . . . . . . 745.2.3 Positioning speed (delay) . . . . . . . . . . . . . . . . . . . . . . . . . 755.2.4 Cost . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 775.3 Large-scale real-road tests . . . . . . . . . . . . . . . . . . . . . . . . .

. . . 775.3.1 Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 785.3.2 Lane determination . . . . . . . . . . . . . . . . . . . . . . . . . . . . 785.3.3 Positioning speed (delay) . . . . . . . . . . . . . . . . . . . . . . . . . 795.3.4 Car orientation variations . . . .

. . . . . . . . . . . . . . . . . . . . . 815.3.5 High speed and low sampling rate . . . . . . . . . . . . . . . . . . . . 815.3.6 Traffic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 825.3.7 Bridges and parking garages . . . . . . . . . . . . . . . . . . . . . . . 825.4 Dis

cussion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 835.4.1 Road layer determination . . . . . . . . . . . . . . . . . . . . . . . . . 835.4.2 Positioning in sheltering environment . . . . . . . . . . . . . . . . . . 846 Conclusion 86Bibliography 87