摘要:
Coupling circuit for coupling a power line communication device to a power line network, including a first network port coupled between a network phase line and a first network line, a second network port coupled between a network neutral line and a second network line, a third network port coupled between a network ground line and a third network line, a first differential modem port including a first terminal and a second terminal, a second differential modem port including a third terminal and a fourth terminal, a first transformer including a first network side winding and a first modem side winding, a second transformer including a second network side winding and a second modem side winding, the transformers including respective terminals, a center tap extending from the midpoint of the first network side winding to a terminal of the second network side winding and a plurality of capacitors.
摘要:
A power unit includes an AC/DC converter for converting VAC input to DC, a zero cross unit for modulating the AC/DC converter output to facilitate zero crossing detection based on the output, and a high pass filter (HPF) for filtering data signals, where the data signals are transmitted and received on the same medium from which the VAC input is received. A method for providing power and data signals from a single powerline source, including receiving incoming VAC in an external power unit, converting the incoming VAC to DC, modulating the DC in accordance with zero crossings from the incoming VAC, filtering the VAC to isolate high frequency data signals, where the data signals are transmitted and received on a same medium from which the incoming VAC is received, and providing the DC, modulated DC, and data signals to an embedded processing unit capable of processing the data signals.
摘要:
A power unit includes an AC/DC converter for converting VAC input to DC, a zero cross unit for modulating the AC/DC converter output to facilitate zero crossing detection based on the output, and a high pass filter (HPF) for filtering data signals, where the data signals are transmitted and received on the same medium from which the VAC input is received. A method for providing power and data signals from a single powerline source, including receiving incoming VAC in an external power unit, converting the incoming VAC to DC, modulating the DC in accordance with zero crossings from the incoming VAC, filtering the VAC to isolate high frequency data signals, where the data signals are transmitted and received on a same medium from which the incoming VAC is received, and providing the DC, modulated DC, and data signals to an embedded processing unit capable of processing the data signals.
摘要:
Coupling circuit for coupling a power line communication device to a power line network, including a first network port coupled between a network phase line and a first network line, a second network port coupled between a network neutral line and a second network line, a third network port coupled between a network ground line and a third network line, a first differential modem port including a first terminal and a second terminal, a second differential modem port including a third terminal and a fourth terminal, a first transformer including a first network side winding and a first modem side winding, a second transformer including a second network side winding and a second modem side winding, the transformers including respective terminals, a center tap extending from the midpoint of the first network side winding to a terminal of the second network side winding and a plurality of capacitors.
摘要:
A method and system for assessing the quality of one or more search engines are provided. The method and system monitor reformulation sessions by users (201) of a search engine (308, 402, 403) by retrieving data from a query log (307, 407, 408), wherein a reformulation session is a series of at least two queries to a search engine (308) issued by a user (201) to satisfy a single information need. The method and system then determine a reformulation session parameter for the search engine (308, 402, 403) and analyse the reformulation session parameter. The reformulation session parameter may be a rate of query reformulations in a reformulation session or a reformulation session duration. Analysing the reformulation session parameter for a single search engine may determine if the parameter changes with time or may determine the parameter with different settings in a single search engine. Analysing the reformulation session parameter for two or more search engines includes comparing the parameters of the two or more search engines to measure the search quality. The analysis can be used to control the operation of one or more search engines.
摘要:
Coupling circuit for coupling a power line communication device to a power line network, including a first network port, a second network port, a third network port, a first modem port, a second modem port, a third modem port, a fourth modem port, a first transformer, a second transformer, a third transformer and at least two capacitors, the first transformer including a first network side winding including two terminals, a first modem side transmitter winding including two terminals, a first modem side receiver winding including two terminals and a center tap, extending from a midpoint between the two terminals of the first network side winding, the second transformer including a second network side winding including two terminals and a second modem side receiver winding including two terminals, the third transformer including a third network side winding including two terminals and a second modem side transmitter winding including two terminals.
摘要:
A method for gathering and recording temporal information for a linked entity, the method including identifying a link related activity within a linked source entity, and recording a time stamp in association with the link related activity.
摘要:
A system and a method for constructing a shopping list for purchasing a collection or basket of goods according to a plurality of weighted parameters, preferably with comparison to both “bricks and mortar” stores and also virtual stores (collectively termed suppliers). Preferably the weighted parameters include the ability to prefer friendlier products, such as products which are organic, environmentally friendly, ethical or a combination thereof. Optionally, the user could determine that certain goods could only be purchased from one or more outlets and/or from a particular type of outlet. Optionally and preferably, the optimization includes determining whether to purchase a larger amount of a product in order to enjoy price savings for that product. According to other preferred embodiments, the user may optionally choose to divide a basket of products between a plurality of suppliers, rather than optimizing the basket at a single supplier.