349 results about "Demarcation point" patented technology

A universal demarcation point for managing the delivery of communications services to a subscriber that provides an interface between a utility distribution network and subscriber owned equipment. The universal demarcation point includes a utility accessible portion and a subscriber accessible portion. The utility accessible portion has an input port, an output port, a plurality of modular connectors, a power supply, and a plurality of service modules. The input port provides access to the universal demarcation point for delivery of communications service from the utility distribution network. The communications services are delivered through a hybrid cable. The hybrid cable has a plurality of fiber optic cables and a plurality of copper cables. The fiber optic cables are capable of transmitting light signals and the copper cables are capable of transmitting electric power. The output port provides access for delivering the communications services from the universal demarcation point into the subscriber's dwelling. The plurality of connectors are fixedly mounted to the universal demarcation point. The power supply is removably mounted to the universal demarcation point. The power supply converts the electric power into a voltage for powering the operation of the universal demarcation point. The service modules are capable of plugging into the modular connectors and convert the light signals that are transmitted on the fiber optic cables onto cables that are suitable for use in the subscriber's dwelling. The subscriber accessible portion is adjacent to the utility accessible portion and has ports that enable the subscriber to test the integrity of the communications services delivered from the utility distribution network.

The invention discloses a method for establishing a relation between a scene stereoscopic depth and a vision difference in a binocular stereoscopic vision system. the method comprises the steps of firstly, solving inner parameters, and relative rotary matrixes and translation vectors of left and right cameras; then, analyzing a main error source and an error model of the binocular stereoscopic vision system; then, analyzing influences of the main error on a base line length and the vision difference of the parallel binocular stereoscopic vision system; then, establishing a common relation model of the scene stereoscopic depth and the vision difference in the binocular stereoscopic vision system; obtaining depth information by a laser distance measuring instrument by selecting a certain amount of demarcation points and carrying out demarcation based on a least square method to solve a relation model between the scene stereoscopic depth and the vision difference in the binocular stereoscopic vision system; and finally, solving the vision difference in left and right images through a corresponding fixed matching method so as to realize accurate recovery and three-dimensional reestablishment of the scene stereoscopic depth. The method has the beneficial effect of directly, simply, accurately and extremely improving the accuracy of the stereoscopic depth recovery and the three-dimensional reestablishment.

Fiber optic distribution cables and methods for manufacturing the same are disclosed. The fiber optic distribution cables present one or more optical fibers outward of the protective covering for distribution of the same toward the subscriber. In one fiber optic distribution cable, a length of distribution optical fiber that is removed from the distribution cable and presented outward of the protective covering is longer than the opening at access location. In another embodiment, a demarcation point is provided for inhibiting the movement (i.e., pistoning) of the distribution optical fiber into and out of the distribution cable. In still another embodiment, an indexing tube is provided for indexing a tether tube within the indexing tube for providing the distribution optical fiber with a suitable excess fiber length. Additionally, other embodiments may include a fiber optic distribution cable having a dry construction and/or a non-round cross-section.

A method and apparatus for using an application layer demarcation point are described. In one embodiment, the method comprises monitoring end-to-end performance of a network application at an application demarcation point in a network, and mediating between provider infrastructure and customer infrastructure based on results of monitoring.

A cable modem integrated session border control circuit operates as a point of demarcation between a local area network (LAN) and a DOCSIS network and, in response to receiving a Session Initiation Protocol (SIP) message, which includes Session Description Protocol (SDP), from a VoIP device coupled to the LAN, communicates with a Cable Modem Termination System (CMTS) to take advantage of DOCSIS Dynamic Quality of Service (DQoS) if a VoIP session between the VoIP device and a remote endpoint includes use of the DOCSIS network. The cable modem integrated session border controller further determines required service flow attributes. If required service flow attributes, as determined from the SDP of the SIP message, matches service flow attributes of an existing UGS service flow with a CMTS, a DOCSIS Dynamic Service Chance (DSC) request is used to add an additional sub flow to the existing UGS service flow. If attributes fail to match attributes of all existing UGS service flows, a DOCSIS Dynamic Service Change (DSC) request is used to initiate an additional UGS service flow with the required service flow attributes.

Disclosed is an emergency feathering control method for a wind generating set. After emergency stopping of the wind generating set, variable rate stopping strategies are adopted. When emergency stopping is just started, feathering is conducted fast so as to reduce the forward load, and after the blade pitch angle reaches the limited angle or time reaches the limited time, the feathering speed needs to be decreased so as to reduce the negative direction load. The emergency feathering control method comprises the following steps that (1) the variable rate stopping demarcation point of the wind generating set is determined; (2) the system state of the wind generating set is monitored; (3) a variable blade execution system mode of the wind generating set is determined; and (4) the wind generating set conducts variable blade operation according to the variable rate stopping mode adopted by a variable blade execution mechanism.

The present invention discloses a power equipment fault rate prediction method considering aging factors. The power equipment fault rate prediction method comprises the steps of fitting a fault rate curve by utilizing the characteristics of a weibull distribution of possessing shape parameters, possessing a great flexibility on data fitting and being able to describe the stages of a bathtub curve completely, and carrying out parameter estimation by applying a Gauss-Newton iterative method to obtain the demarcation points of the stages respectively. In addition, the fault rate prediction method of the present invention also considers the influence of different maintenance policies on the device fault rate, and applies an equivalent age method to solve the actual fault rate of a device. The device fault rate obtained by utilizing the method in the present invention is closer to the reality, and the prediction accuracy of the power equipment fault rate can be improved effectively, thereby guaranteeing the accuracy of the reliability and risk evaluation of a system, and providing correlated reliable bases for the dispatching and maintenance of the system.

The invention discloses a modeling method for a sand shale interbed type sedimentary body reservoir architecture. The method comprises three aspects of hard data control, layered modeling, and reservoir and interlayer nesting, wherein the layered modeling mainly comprises reservoir modeling, spacing layer modeling, and interlayer modeling. According to the modeling method, thin layer division is performed by adopting a half amplitude point based thin layer division principle, so that the defect that true thicknesses and depths of a reservoir and a spacing layer cannot be obtained in a conventional method for determining a boundary line of a thin layer based on relative maximum of natural gamma and/or positive anomaly of natural potential is overcome; and the hard data control is adopted for architecture modeling, so that a demarcation point of sand shale is accurately positioned, three-dimensional spatial distribution of single sand bodies and sub sand bodies is accurately depicted, the architecture effect is good, the precision is high, the difficulty in development is lowered, and the development benefits are increased.

The invention discloses a heel blood sampler. The heel blood sampler comprises a shell, a trigger piece installed on an installing port, a rack, a trigger gear and a trigger control swing arm, wherein a blade outlet is formed in the front end of the shell, and the installing port is formed in one side of the shell; the trigger piece is connected with the shell in the mode of moving inwards and forwards; the rack and the trigger gear are connected in a meshed mode, the rack is installed in the shell in the mode of sliding forwards and backwards, a trigger spring is connected to the rear end of the rack, the rear end of the trigger spring is connected with a spring fixing structure arranged in the shell, the trigger gear is connected with a first supporting shaft fixed into the shell through a connecting long hole, a limit opening is formed in the rear end of the trigger gear, a limit insertion block is arranged in the shell, and a blade is installed at the front end of the trigger gear; the trigger control swing arm is rotationally installed on a second supporting shaft arranged in the shell and is composed of a first arm segment and a second arm segment with the second supporting shaft being the demarcation point. The heel blood sampler has the advantages that operation is convenient, blade feeding speed is high, and the painful feeling is light in the blood sampling process.

The invention relates to a cost benefit analysis method of a renewable energy source distributed generation operation mode. The method comprises the following steps: determining all operation modes of the renewable energy source distributed generation; performing match analysis on the distributed contribution and a load curve, and determining different types of electric quantity; determining property right demarcation points, boundary conditions and calculation parameters of the distributed generation under different operation modes; determining the expense composition and income composition of the distributed generation in the whole life cycle under different operation modes; determining the total expense present value, annual average expense present value, total income present value and annual average income present value of the distributed generation in the whole life cycle under different operation modes; determining the benefit/cost value PI of the distributed generation in the whole life cycle under different operation modes; and selecting the scheme with the greatest benefit/cost value, and determining the optimal operation mode of the distributed generation. The method provided by the invention lays a firm theoretical foundation for making supporting policies for the renewable energy source distributed generation and distribution network.

The invention discloses an image semantic segmentation-based sea-sky-line detection method. The method mainly includes the following steps that: (1) a to-be-detected image is inputted; (2) super-pixelsegmentation is performed on the inputted image by using the SLIC (Simple Linear Iterative Clustering) algorithm; (3) with super pixels as basic units, a probability graphical model for sea surface image semantic segmentation is established, and the image is segmented into a sky region, a land and haze mixed region and a seawater region from top to bottom through using the graphical model; (4) the seawater region is extracted, the mask image of the seawater region is obtained; (5) the demarcation points of the seawater region are extracted from the mask image of the seawater region accordingto the gradient information of a column direction; and (6) the RANSAC (Random Sample Consensus) algorithm is adopted to linearly fit the demarcation points of the seawater region, so that the linear parameter of a sea-sky-line can be determined. The image semantic segmentation-based sea-sky-line detection method of the invention not only can accurately detect a sea-sky-line in a complex environment, but also can effectively detect a coastline under a long seashore background, and has high accuracy and robustness.

The invention relates to a seismic signal random noise suppression processing method. The method includes the following steps that: original noisy seismic signal s(t) are decomposed by using an improved noise-adaptive complete set empirical modal decomposition method, so that a finite number of IMF components and residual components are obtained; an energy demarcation point l of effective signalsand noises in the IMF components of each order is determined according to a permutation entropy theory; and singular value decomposition and noise reduction processing is performed on the high-frequency IMF components of the (1-l)-th order with more noises; and the high-frequency IMF components which have been subjected to the secondary noise reduction processing, low-frequency IMF components which are not processed, and the residual components are accumulated and reconstructed, so that de-noised seismic signals can be obtained. According to the seismic signal random noise suppression processing method of the invention, a multi-step joint processing technology is adopted, and therefore, a seismic noise suppression processing effect can be effectively improved, the details of the lineups ofa seismic channel set can be improved, and conditions can be provided for subsequent seismic data processing, interpretation and forward and inverse calculation.

An xDSL splitter module is provided for mounting in a network interface device (NID) that contains an xDSL splitter circuit and the terminals to connect the circuit between outside plant wires and two pairs of inside wires to deliver POTS and xDSL to the subscriber. The module also has at least a demarcation point for the POTS signal.

An approach for detecting an error associated with a routing network coupled to a transport network comprising a plurality of optical communication nodes, switching, by an optical communication node, to a troubleshooting channel associated with the transport network using one or more router counterpart cards, and troubleshooting the error using the one or more router counterpart cards.

The invention relates to a support vector machine based classification method of base-band time-domain voice-frequency signals, comprising the following steps of: firstly segmenting a base-band time-domain voice-frequency signal sequence to obtain initial segmented subsequences; then respectively subtracting respective mean value from each initial segmented subsequence to obtain zero-mean-value segmented subsequences; then carrying out windowing treatment on each zero-mean-value segmented subsequence, respectively carrying out Fourier transformation treatment on results to obtain the spectrum amplitudes of the zero-mean-value segmented subsequences, and respectively solving the standard difference of each spectrum amplitude to obtain a characteristic quantity; sequentially combining the zero-mean-value segmented subsequences into a long subsequence according to an order; then calculating a normalized autocorrelation matrix of the long subsequence, and carrying out singular value decomposition on the normalized autocorrelation matrix to obtain a demarcation point of a subspace; then calculating the signal to noise ratio parameter of an other characteristic quantity; and finally sending an input vector composed of the two characteristic quantities into a trained SVM (Support Vector Machine) classifier to identify the classification of base-band time-domain voice-frequency signals and distinguish a voice signal and a noise signal.

The invention discloses a method for constructing a protection big data fault characteristics system based on wave recording and scanning technology. The method comprises the following steps: through the decoding of a wave recording file, accessing the waveform data of all sampling points; calculating the valid values and determining whether adjacent waves experience mutations or not; for the unit experiencing mutations in their valid values, using the slope mutations of the sampled values prior to or after the unit to determine the accurate mutation point and to determine the fault time; extracting the local characteristics quantity of the voltage and current waveform in the wave recording data; representing in multiple dimensions the characteristics information extracted from the data window given on the waveform; and using the fault time as the critical point to form local characteristics quantities at different times in the scanned waveform data prior to and after the fault and to construct a complete fault characteristics system. According to the invention, in multiple perspectives and dimensions, fault characteristics data are excavated and extracted, and based on the requirement of a protection big data analyzing platform and a big data theory, a fault characteristics system structure is formed, which can ensure the realization of higher-level of application functions of the protection big data in a power grid system.

The invention discloses a three-dimensional measurement method for a tunnel rock formation attitude. According to the method, a large amount of geographical information data such as digital elevation models (DEM) and images, which are provided by Google Earth, serve as a data source, a Google Earth component object model application program interface (COM API) is used for obtaining rock stratum demarcation point data from the Google Earth, rock stratum surface fitting is conducted, the rock formation attitude is calculated, and rock stratum surfaces and rock formation attitude elements are displayed visually through a marking language. Compared with field surveys conducted through geological compasses, the three-dimensional measurement method for the tunnel rock formation attitude based on a Google Earth platform has the advantages that time and effort can be saved, the survey range can be expanded, rock formation attitude elements of areas with harsh natural conditions and large rock stratum span ranges can be measured conveniently, and the method is a good supplement to traditional measurement methods.

The invention discloses a method for surveying and mapping a map by collecting farmland key points. The method comprises the following steps: 1, obtaining GPS position information; 2, drawing an outline of an area to be surveyed; 3, surveying and mapping a farmland key demarcation point, and marking a land parcel name and note; 4, performing real-time verification, prompting, and dividing the farmland; 5, uploading surveying and mapping data; and 6, obtaining a vector map. Compared with the prior art, in the technical scheme provided by the invention, the real-time mapping can be achieved merely by collecting key control points, simultaneously, initiative verification is further performed according to a logic relation between the key points, the non-collected key points are promoted, and the missed survey and the false survey are prevented; and moreover, the reliability is improved, and the labor intensity of manual operation is reduced simultaneously.

The invention relates to a heart sound location segmenting method suitable for an Android system. The heart sound location segmenting method suitable for the Android system comprises the following steps of firstly carrying out pre-processing on a heart sound signal, which mainly consists of mean-removal normalization and resampling of hear sounds; secondly determining the order number of high-order Shannon entropies, and extracting envelope of the heart sounds by utilizing the high-order Shannon entropies; thirdly configuring a sliding window, determining an upper threshold and a lower threshold of the envelope of the heart sounds, restraining the influence of noise and interference on segmentation by utilizing the upper threshold, carrying out the detection on the demarcation point of the heart sounds by utilizing the lower threshold, and carrying out initial location on the demarcation point; finally correcting the demarcation point after being subjected to the initial location, eliminating the influence of the interference according to medical physiological information of the heart sounds, judging whether possible splitting of the heart sounds exists or not, and carrying out the combination of the heart sounds if determining that the splitting of the hear sound exists. According to the heart sound location segmenting method suitable for the Android system, the computation and extract processes of the envelop of the heart sounds are simplified, and excellent robustness on the noise and the heart murmur is provided; the accuracy of segmentation is relatively high.

The invention relates to a modeling method of a mathematical model for silicon solar cell engineering, which is used for modeling according to the characteristic of large similarity of an I-V characteristic curve of a silicon solar cell and a particle-throwing motion locus curve. In the coordinate system of the particle-throwing motion locus curve, the coordinate system is divided into different gravitational fields by two demarcation points at a maximum-power point voltage position and a voltage position lower than the maximum power point, and then deducing and modeling are carried out according to the principle of kinematics. The invention not only can still meet the requirement of engineering precision well; through adjusting the position of the demarcation point in the voltage position lower than the maximum power point, the model of the invention can be close to actual measurement data in a zone nearby the maximum-power point voltage position well so as to be beneficial to the realization of a maximum power tracking algorithm; and the invention can also greatly improve the response speed of control units in controllers along with the changes of external environments comprising illumination, temperature and the like. When the model is calculated and controlled by adopting controllers comprising a single-chip machine or a DSP (Digital Signal Processor) and the like in engineering practice, the operating time of the model is greatly shortened.