Abstract: The disclosure provides a method for tree-based machine learning model reduction and an electronic device using the same. A boosting tree model including multiple subtrees is obtained. Subtree importance of each of the subtrees is determined according to feature importance information respectively corresponding to multiple model features of the boosting tree model. At least one continuous tree subset is extracted from the subtrees according to the subtree importance of each of the subtrees. The at least one continuous tree subset includes at least one of the subtrees. At least one reduced boosting tree model of the boosting tree model is obtained according to the at least one continuous tree subset.

Abstract: The present invention discloses an online testing system and a testing method for computer programs. The online testing system includes a communication unit, a storage unit and an operation unit. The communication unit is configured to connect with an external device, and receive a computer program from the external device. The storage unit is configured to store a raw data, a program execution module, a data generation module and an evaluation module. When the computer program is received, the operation unit is configured to: perform the data generation module to generate a testing data and a solution corresponding to the testing data according to the raw data; perform the program execution module to execute the computer program based on the testing data for generating an execution result; and perform the evaluation module to generate a score according to the execution result and the solution.

Abstract: A method and a system for recommending an application parameter setting and a system specification setting in a distributed computation are provided. The method includes the following steps. An application information, a framework information and a system information are received. Whether a performance model which includes a relationship of a performance, the application information, the framework information and the system information is stored in a storage unit is determined. The application parameter setting and the system specification setting are obtained according to the performance model, if the performance model is stored in the storage unit.

Abstract: A method and a system for recommending an application parameter setting and a system specification setting in a distributed computation are provided. The method includes the following steps. An application information, a framework information and a system information are received. Whether a performance model which includes a relationship of a performance, the application information, the framework information and the system information is stored in a storage unit is determined. The application parameter setting and the system specification setting are obtained according to the performance model, if the performance model is stored in the storage unit.

Abstract: A positioning pole includes a pole body, and at least three protruding ribs. The three protruding ribs are disposed around a circumference of the pole body. An axis of one of the protruding ribs is parallel to an axis of the pole body. The pole body has a terminal surface. The protruding ribs have top surfaces. The top surfaces and the terminal surface are disposed on the same horizontal level.

Abstract: An angle adjustment apparatus for a dish antenna comprises a base, a first rotating frame, a second rotating frame, and a second rotation angle adjustment mechanism. The first rotating frame is fixed to the base, and can relatively rotate around the base with a first rotating angle. The second rotating frame is fixed to the first rotating frame, and can relatively rotate around the first rotating frame with a second rotating angle. The second rotation angle adjustment mechanism comprises a first screw rod, a screw nut post, and a second screw rod. One end of the first screw rod is fixed to the first rotating frame, and the other end is equipped with first threads and engaged with the screw nut post. One end of the second screw rod pivots on the second rotating frame, and the other end is equipped with second threads and engaged with the screw nut post. The first threads and second threads have different screw directions, or have the same screw direction but with different thread pitches.

Abstract: A dish antenna adjustment method is performed as follows. A dish antenna angle adjustment apparatus is provided; the dish antenna angle adjustment apparatus having a base member, a first rotation member and a second rotation member. The first rotation member is pivotally connected to the second rotation member, and rotates by a first rotation angle relative to the second rotation member. The second rotation member is pivotally connected to the base member, and rotates by a second rotation angle relative to the base member. A first rotating angle adjustment mechanism is connected to the angle adjustment apparatus of the dish antenna, e.g., the first rotating angle adjustment mechanism connects the first rotation member and the second rotation member. The first rotating angle adjustment mechanism adjusts the first rotation angle between the first and second rotation members.

Abstract: An angle adjustment apparatus for a dish antenna comprises a base, a first rotating frame, and a second rotating frame. The first rotating frame is fixed to the second rotating frame, and can rotate around the second rotating frame with a first rotating angle. The second rotating frame is fixed to the base, and can rotate around the base with a second rotating angle. The first rotating frame comprises at least one first arc-shaped slot, and the second rotating frame comprises at least one second arc-shaped slot corresponding to the first arc-shaped slot. A fastener passes through the first arc-shaped slot and the second arc-shaped slot so as to attach the first rotating frame and the second rotating frame.

Abstract: A dish antenna adjustment method is performed as follows. A dish antenna angle adjustment apparatus is provided; the dish antenna angle adjustment apparatus having a base member, a first rotation member and a second rotation member. The first rotation member is pivotally connected to the second rotation member, and rotates by a first rotation angle relative to the second rotation member. The second rotation member is pivotally connected to the base member, and rotates by a second rotation angle relative to the base member. A first rotating angle adjustment mechanism is connected to the angle adjustment apparatus of the dish antenna, e.g., the first rotating angle adjustment mechanism connects the first rotation member and the second rotation member. The first rotating angle adjustment mechanism adjusts the first rotation angle between the first and second rotation members.

Abstract: An angle adjustment apparatus for a dish antenna comprises a base, a first rotating frame, a second rotating frame, and a second rotation angle adjustment mechanism. The first rotating frame is fixed to the base, and can relatively rotate around the base with a first rotating angle. The second rotating frame is fixed to the first rotating frame, and can relatively rotate around the first rotating frame with a second rotating angle. The second rotation angle adjustment mechanism comprises a first screw rod, a screw nut post, and a second screw rod. One end of the first screw rod is fixed to the first rotating frame, and the other end is equipped with first threads and engaged with the screw nut post. One end of the second screw rod pivots on the second rotating frame, and the other end is equipped with second threads and engaged with the screw nut post. The first threads and second threads have different screw directions, or have the same screw direction but with different thread pitches.