Abstract: Systems and method are disclosed for applying a query to an event stream by storing one or more event constraints; performing constraint aware complex event processing on the query and the event constraints; and optimizing the query at run time.

Abstract: Systems and methods process generalized-tree-pattern queries by processing a twig query with a bottom-up computation to generate a generalized tree pattern result; encoding the generalized tree pattern results using hierarchical stacks; enumerating the generalized tree pattern result with a top-down computation; a hybrid of top-down and bottom-up computation for early result enumeration before reaching the end of document; and a more succinct encoding scheme that replaces the hierarchical stacks to further improve the performance.

Abstract: Systems and methods to provide two bottom up path matching solutions and one post processing solution for evaluating value predicates and tree pattern queries. The first path matching method triggers the matching whenever a leaf query step is seen and stores the prefix sub-matches in a cache for reuse. The second path matching method is an NFA (non-deterministic finite state automata) based solution through a post-order traversal of the XML document tree. The post processing method relies on a compact encoding the path results, which avoids redundant value predicate, join evaluations and any duplicate elimination, sort and grouping operations.

Abstract: Systems and methods are disclosed to guarantee the safety of a continuous join query (CJQ) over one or more punctuated data streams by constructing a punctuation graph; checking whether the punctuation graph is strongly connected and if so, indicating that the CJQ is safe to execute. The system uses a generalized punctuation graph and its transformation to support arbitrary punctuation schemes. The system also provides an efficient shared purge algorithm for multi-way join operator.

Abstract: A shovel has a main handle, a blade member, a pivot base and an auxiliary handle. The blade member is mounted at an end of the main handle, the pivot base is pivoted on the main handle at where adjacent to the blade member and the auxiliary handle is pivoted on the pivot member. The main handle is rotary independently relative to the pivot base. User operates the shovel of the present invention by holding the main handle and the auxiliary handle by hands and only needs to turn the hand holding the main handle to tip the blade member for throwing the shoveled objects off.

Abstract: The invention herein relating to a manufacturing method of the grip rubber for the exercise device, more especially, the manufacturing method of the mildewproof and antibacterial grip rubber for the exercise device is characterized that during the manufacturing process of the grip rubber, the mildewproof, the antibacterial and the aromatic agents are added or the manufactured grip rubber is immersed in the mixed liquid of the mildewproof, the antibacterial and the aromatic agents, to allow the mildewproof, the antibacterial and the aromatic agents to attach to the grip rubber and thus to achieve the mildewproof and antibacterial effect.

Abstract: The invention herein relating to a manufacturing method of the grip rubber for the exercise device, more especially, the manufacturing method of the mildewproof and antibacterial grip rubber for the exercise device is characterized that during the manufacturing process of the grip rubber, the mildewproof, the antibacterial and the aromatic agents are added or the manufactured grip rubber is immersed in the mixed liquid of the mildewproof, the antibacterial and the aromatic agents, to allow the mildewproof, the antibacterial and the aromatic agents to attach to the grip rubber and thus to achieve the mildewproof and antibacterial effect.