摘要:
A multi-band antenna comprising a conductive structure and a plurality of current probes coupled around the conductive structure. Each current probe is designed to receive and transmit in a substantially different frequency band than the other current probes. The current probes are positioned on the conductive structure so as to effectively create a plurality of transmit/receive antennas such that each respective antenna has a voltage standing wave ratio (VSWR) of less than or equal to approximately 3:1 for a given range within each respective frequency band.
摘要:
Methods and systems for detection of an electric field generated by the human/animal body can include providing a passive antenna system for detecting changes in the ambient electric field due to interaction of the ambient with the charges generated by the human/animal body, and a high impedance sensor that is fixed to the encapsulated wire antenna. The result is a passive human/animal detection system without any moving parts. The antenna can be an encapsulated wire, and the wire length can be chosen according the desired application. For systems that are intended to detect the presence of a human being or animal, the encapsulated wire can have a length of one hundred feet or more, and a grid of wires can be used for detection within an Area of Interest (AOI).
摘要:
An apparatus for remotely detecting metal objects carried by a person includes an antenna and a signal generator coupled to the antenna operable to cause the antenna to emit a first electromagnetic signal to the person at a frequency that is known to be resonant with the human body. The apparatus further includes a data capture device operable to capture response signal energy received by the antenna, the response signal energy being provided from the person in response to the first electromagnetic signal. Processing circuitry for the apparatus is operable to determine whether the response signal energy is indicative whether or not the person is carrying an appreciable amount of metal, based on reference response templates for persons that are known to be metal-free.
摘要:
Methods for remote detection of humans can include the step of transmitting vertically polarized electromagnetic signals into an area of interest (AOI) when no humans are present. A first time domain measurement of return response signal energy from the AOI can be accomplished to establish a background signal. A second time domain measurement of response signal energy from the AOI can be made when at least one human is present, to establish a background-plus-human signal. The two signals can be subtracted to yield a reference time domain human signal. The electromagnetic signal is periodically re-transmitted. The background subtracted from subsequent response energy, and the result compared to the reference time domain human signal. A visual or audible indication occurs when the resulting signal matches the reference signal. Fast Fourier Transforms (FFT) of the time domain signals can be used to yield frequency responses, which can be monitored.
摘要:
The present invention is directed to a method and system for providing information obtained from both online stores and offline stores and for offering more purchasing options to customers. A customer can specify a particular item with detailed aspects for an information search, along with location information to define a local geographic area. The gathered local price information is presented to the customer over a network connection. The customer can purchase the item from either online stores or offline stores over a network connection.
摘要:
The present invention is directed to a method and system for providing information obtained from both online stores and offline stores and for offering more purchasing options to customers. A customer can specify a particular item with detailed aspects for an information search, along with location information to define a local geographic area. The gathered local price information is presented to the customer over a network connection. The customer can purchase the item from either online stores or offline stores over a network connection.
摘要:
A Source Code Author Identifier (SCAI) automates the process of manually running a comparison to identify changes between versions of a source code file and associates identified changes with the author who made the change. After a developer identifies a segment of code in a first file, wherein the first file as a newer version of a second file, SCAI compares the segment of code in the first file to a corresponding segment of code in the second file. SCAI identifies the author of the first file whenever a difference is detected between the segment of code in the first file and the corresponding segment of code in the second file. SCAI displays the author of the first file next to the detected difference between the segment of code from the first file and the corresponding segment of code from the second file. SCAI can repeat the comparison across a plurality of versions of the file, comparing each version with the previously created version.
摘要:
Disclosed are various embodiments for using applications of items in conducting item searches. It is determined, in one or more computing devices, whether a search query string includes an application key. A non-key portion of the search query string that excludes the application key is obtained when the search query string includes the application key. A search is executed on a subset of items in an item catalog using the non-key portion of the search query string to obtain a result set of items. Each item in the subset of items is associated with an item application that matches the application key.
摘要:
A Source Code Author Identifier (SCAI) automates the process of manually running a comparison to identify changes between versions of a source code file and associates identified changes with the author who made the change. After a developer identifies a segment of code in a first file, wherein the first file as a newer version of a second file, SCAI compares the segment of code in the first file to a corresponding segment of code in the second file. SCAI identifies the author of the first file whenever a difference is detected between the segment of code in the first file and the corresponding segment of code in the second file. SCAI displays the author of the first file next to the detected difference between the segment of code from the first file and the corresponding segment of code from the second file. SCAI can repeat the comparison across a plurality of versions of the file, comparing each version with the previously created version.