1. A method of clustering a multi-type vector space in accordance with a plurality of attributes including network attributes and application attributes, the method comprising:
obtaining the network attributes from a network having a plurality of nodes;
obtaining the application attributes of an application;
obtaining a user’s communication interest as represented by at least one of: a user request for a content update or a user subscription to a specific data item or to a set of proximal data sources;
forming a plurality of feature vectors, one for each of the plurality of nodes, where each single one of the plurality of feature vectors is based on the user’s communication interest, network attributes, and application attributes, such that each single one of the plurality of feature vectors comprises features extracted from a plurality of different types of sources; and
clustering the plurality of nodes based on the plurality of feature vectors, wherein the clustering is performed by a nested method in which one or more of said plurality of nodes are initially clustered based on a sub-set of the plurality of attributes and then re-clustered by iteratively considering additional ones of the plurality of attributes.
2. The method of claim 1, further comprising forming network delay maps and forward capacity maps from the network attributes, and such that the clustering is additionally based on the network delay maps and on the forward capacity maps.
3. The method of claim 1, in which the obtaining the application attributes includes obtaining information regarding collaborative usage of the application.
4. The method of claim 1, in which the obtaining the network attributes includes obtaining network path loss information, and such that the clustering is additionally based on the network path loss information.
5. The method of claim 1, such that the clustering is additionally based on bandwidth constraints.
6. The method of claim 1, such that the clustering is additionally based on a weighted distance function modeled from normalized attribute subspace metrics.
7. The method of claim 1, wherein the network attributes comprise at least one of: an available bandwidth, a network delay, a network packet loss, and a node fanout.
8. The method of claim 1, wherein the forming each single feature vector further comprises basing each single feature vector on one or more quality of service requirements.
9. A computer readable storage device containing an executable program for clustering a multi-type vector space in accordance with a plurality of attributes including network attributes and application attributes, where the program performs steps comprising:
obtaining the network attributes from a network having a plurality of nodes;
obtaining the application attributes of an application;
obtaining user’s communication interest as represented by at least one of: a user request for a content update or a user subscription to a specific data item or to a set of proximal data sources;
forming a plurality of feature vectors, one for each of the plurality of nodes, where each single one of the plurality of feature vectors is based on the user’s communication interest, network attributes, and application attributes, such that each single one of the plurality of feature vectors comprises features extracted from a plurality of different types of sources; and
clustering the plurality of nodes based on the plurality of feature vectors, wherein the clustering is performed by a nested method in which one or more of said plurality of nodes are initially clustered based on a sub-set of the plurality of attributes and then re-clustered by iteratively considering additional ones of the plurality of attributes.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. An sector gear split into sections for secure engagement around a tripper shaft, whereby the gear is replaced in less time, by a smaller crew, and with fewer tools.
2. The sector gear of claim 1, wherein the gear is split into halves.
3. The sector gear of claim 1, wherein the gear sections are secured to each other around the tripper shaft with bolts.
4. A sector gear comprising:
a first portion with a first end defining gear teeth and a second end including a member configured to engage a resilient member;
a second portion detachably attachable to the first portion;
wherein the first portion can be attached to the second portion such that the first portion and the second portion together define a circular aperture sized to receive a shaft of a train stop.
5. The sector gear of claim 4, wherein the first portion and the second portion define aligned threaded recesses such that the first portion can be bolted to the second portion.
6. The sector gear of claim 5, comprising Allen bolts attaching the first portion to the second portion.
7. The sector gear of claim 4, wherein the first portion defines a threaded recess extending from a surface that defines a portion of the circular aperture through the first portion to an opposite side of the first portion, the threaded recess sized to receive a set screw.
8. The sector gear of claim 4, wherein the first portion defines a keyway on a surface that defines a portion of the circular aperture.
9. A train stop comprising:
a motor;
a circuit breaker configured to operate the motor;
a sector gear mechanically connected to the motor such that operation of the motor rotates the sector gear in a first direction, the sector gear comprising:
a first portion with a first end defining gear teeth and a second end including a member configured to engage a spring;
a second portion detachably attachable to the first portion;
wherein the first portion can be attached to the second portion such that the first portion and the second portion together define a circular aperture sized to receive a shaft of the train stop;
the shaft of the train stop extending to a tripper arm disposed outside a casing of the train stop; and
the spring biasing the sector gear to rotate a second direction opposite the first direction.
10. The sector gear of claim 9, wherein the first portion and the second portion define aligned threaded recesses such that the first portion can be bolted to the second portion.
11. The sector gear of claim 10, comprising Allen bolts attaching the first portion to the second portion.
12. The sector gear of claim 9, wherein the first portion defines a threaded recess extending from a surface that defines a portion of the circular aperture through the first portion to an opposite side of the first portion, the threaded recess sized to receive a set screw.
13. The sector gear of claim 9, wherein the first portion defines a keyway on a surface that defines a portion of the circular aperture.