Abstract: A sample-difference-based method and system for interpreting a deep-learning model for code classification is provided, wherein the method includes a step of off-line training an interpreter: constructing code transformation for every code sample in a training set to generate difference samples; generating difference samples respectively through feature deletion and code snippets extraction and then calculating feature importance scores accordingly; and inputting the original code samples, the difference samples and the feature importance scores into a neural network to get a trained interpreter; and a step of on-line interpreting the code samples: using the trained interpreter to extract important features from the snippets, then using an influence-function-based method to identify training samples that are most contributive to prediction, comparing the obtained important features and the most contributive training samples, and generating interpretation results for the object samples.

Abstract: A prybar has a handle shaft. A first prybar end extends from the handle shaft. The first prybar end includes a first prybar end first fork tine and a first prybar end second fork tine. A pivot head extends from the handle shaft. The pivot head includes a first pivot head button and a second pivot head button. A second prybar end extends from the pivot head. The second prybar end rotates on the pivot head relative to the handle shaft when the first pivot head button and the second pivot head button are depressed. A first handle retaining arm and a second handle retaining arm extends from the second prybar end. The first handle retaining arm and the second handle retaining arm are parallel and form a handle shaft slot. The handle shaft extends into the handle shaft slot.

Abstract: A driver tool has a grip handle. The grip handle has a grip handle height less than a grip handle width. A first axis base is mounted to the grip handle. The first axis base includes a first saddle flange and a second saddle flange. A pair of primary link pins are mounted to the first saddle flange and the second saddle flange defining a first axis of rotation. A coupler link is mounted on the first axis of rotation to rotate on the first axis of rotation relative to the first axis base. A pair of secondary link pins mounted to the coupler link. The pair of secondary link pins define a second axis of rotation that is perpendicular to the first axis of rotation. A driving link is mounted to the second axis of rotation. The driving link includes a driving socket.

Abstract: A driver tool has a grip handle. The grip handle has a grip handle height less than a grip handle width. A first axis base is mounted to the grip handle. The first axis base includes a first saddle flange and a second saddle flange. A pair of primary link pins are mounted to the first saddle flange and the second saddle flange defining a first axis of rotation. A coupler link is mounted on the first axis of rotation to rotate on the first axis of rotation relative to the first axis base. A pair of secondary link pins mounted to the coupler link. The pair of secondary link pins define a second axis of rotation that is perpendicular to the first axis of rotation. A driving link is mounted to the second axis of rotation. The driving link includes a driving socket.

Abstract: An infinitely variable speed and multi-functional wrench has a wrench body. The sockets are arranged at two ends of the wrench body. An adjustment screw bolt is arranged on the wrench body. An adjustable wrench support matches with sockets and are separately arranged on two ends of the adjustment screw bolts. An adjustment threaded sleeve is arranged between the adjustment wrench support and the adjustment screw bolt. An adjustable button fixed with the adjustment screw bolt is arranged on the adjustment screw bolt. The spacing between the sockets and the adjustable wrench support can be adjustment with the adjustable button. The diameters of the wrench holes at two ends of the wrench body varies with each other.

Abstract: An infinitely variable speed and multi-functional wrench has a wrench body. The sockets are arranged at two ends of the wrench body. An adjustment screw bolt is arranged on the wrench body. An adjustable wrench support matches with sockets and are separately arranged on two ends of the adjustment screw bolts. An adjustment threaded sleeve is arranged between the adjustment wrench support and the adjustment screw bolt. An adjustable button fixed with the adjustment screw bolt is arranged on the adjustment screw bolt. The spacing between the sockets and the adjustable wrench support can be adjustment with the adjustable button. The diameters of the wrench holes at two ends of the wrench body varies with each other.