479results about How to "Meet engineering needs" patented technology

The invention relates to the field of network information retrieval and mining, in particular to a system and method for identifying webpage types. The method comprises the following steps that a heuristic rule is predefined, and a heuristic rule list is generated; a predetermined feature is extracted from a training webpage to form a standard feature vector which is optimized twice to form a simplified feature set, a classifier and a feature extractor are established, and a classification model is generated through the classifier; based on an URL and a source code of a webpage to be identified, rule matching is carried out on the heuristic rule list; if matching succeeds, the webpage type of the webpage to be identified is output; if matching fails, the classifier is used for carrying out webpage type classification on the webpage to be identified. The system and method for identifying webpage types are flexible and convenient to use, high in identifying speed and high in identifying accuracy, big change is of no need when a cross language webpage is identified, identifying efficiency is high, and high actual use value is achieved.

The invention discloses a relational database based generation method of J2EE codes, comprising the following steps: 1. object code template definition setting: defining an invariable code as a template and a variable code as a macro according to an existing frame; 2. external data acquisition: acquiring a relational database list structure parameter, database object annotation information, a structuralized query command, a code generation configuration parameter and an operating system parameter; 3. logic operation: obtaining the macro related to an object code through logic operation according to the acquired parameters; and 4. code generation: applying the macro to the code template to generate the object code of an MVC three-layer frame. The invention realizes an integral technical proposal to generate the J2EE codes on the basis of the relational database, guided by a two to eight principle of J2EE software development and according to a two to eight principle of the Barrett law that 80 percent of a total result is formed by 20 percent of total consumed time.

The invention discloses a method for remotely upgrading an optical network unit. An operation management and maintenance protocol data unit is expanded and serves as a carrier for upgrading an interactive message between an optical network unit (ONU) and an optical line terminal (OLT). The method comprises the following steps that: the OLT sends an upgrade request message to the ONU, judges whether the ONU allows upgrade according to a received upgrade response message, and encapsulates an upgrade file in an upgrade message and transmits the upgrade file to the ONU if the upgrade is allowed; after the file is completely transmitted, the OLT sends a transmission completion notification message to the ONU; after receiving the upgrade file transmission completion notification message sent by the OLT, the ONU writes the upgrade file in a spare storage area or the current storage area; and the OLT starts from the storage area, and sets the storage area as a primary storage area if the OLT is successfully started, namely the OLT always starts from the storage area from now on. The invention discloses a system for remotely upgrading the optical network unit. The technical scheme is easy to realize and practical.

The invention provides a high-strength and high-Gd-content deformed magnesium alloy and a preparing method thereof. The magnesium alloy comprises the following elements of Mg, Gd, Zn and one or more kinds of Y, Zr and Mn. The preparing method includes the following steps that a magnesium alloy cast ingot high in Gd content is prepared; after the magnesium alloy cast ingot is subjected to two steps of T4 solution treatment, quenching is conducted at the temperature ranging from 80 DEG C to 100 DEG C, and a T4-state magnesium alloy cast ingot is obtained; the T4-state magnesium alloy cast ingot is subjected to different-temperature extrusion forming and is then quenched at the temperature ranging from 15 DEG C to 30 DEG C, and a bar or plate is obtained; and the bar or plate is subjected to cold rolling and cold drawing deformation at the room temperature, then artificial aging is conducted, and a T10-state deformed magnesium alloy, namely the high-strength and high-Gd-content deformed magnesium alloy is obtained. According to the high-strength and high-Gd-content deformed magnesium alloy and the preparing method thereof, the preparing technology is simple, the performance is stable, the success rate is high, the production efficiency is high, and the high-strength and high-Gd-content deformed magnesium alloy and the preparing method thereof are easily applied to industrial production.

The invention relates to a power distribution method for a hybrid energy storage system, and belongs to the technical field of new energy power generation systems. The method comprises the following steps: generating a fluctuating power signal; performing power distribution on the power signal through a low-pass filter; making response characteristics to reference power of energy storage equipment equivalent by using a power delay equivalent device; calculating the charge state of the energy storage equipment through an energy storage equipment charge state calculation device; judging and controlling the working state of the energy storage equipment by adopting a time constant comprehensive judgment device to obtain a corresponding variable low-pass filter time constant to adjust the power distribution. The power distribution strategy for the hybrid energy storage system based on the variable filter time constant of an energy storage equipment charge state disclosed by the invention has the function of changing the filter time constant of the low-pass filter in real time, and has the advantages of reducing the change range of the energy storage equipment charge state, slowing the saturation or the depletion of the energy storage equipment charge state to a certain degree, prolonging the service life of the energy storage equipment and the like.

The invention discloses a magnetic levitation train positioning and speed measuring system and method and a magnetic levitation train. The magnetic levitation train positioning and speed measuring system comprises a train-mounted coil, an induction loop line and a ground control unit. The train-mounted coil is installed on a body of the magnetic levitation train, the induction loop line and a magnetic levitation train synchronous linear motor traction winding are jointly laid on a track, and the winding manner of the induction loop line is the same as that of the magnetic levitation train synchronous linear motor traction winding. When high-frequency alternating current enters the train-mounted coil, an alternating magnetic field is formed on the periphery of the train-mounted coil, and the train-mounted coil is used as an excitation source of the alternating magnetic field. The induction loop line is used for generating induction voltage signals when the train-mounted coil moves along the induction loop line. The ground control unit is used for obtaining position and speed information of the magnetic levitation train according to the induction voltage signals sent by the induction loop line. By the adoption of the system, the structure of the system is simplified, the accuracy and reliability of the magnetic levitation train positioning and speed measuring system are improved, and the position and speed information of the magnetic levitation train is detected easily, conveniently and rapidly.

The invention discloses a foundation pile foundation model analyzing method and a test device for the same. The method includes: building a dispersing spring support model of to-be-tested pile-earth related actions, building a to-be-tested pile inner force and deformation equation and transmission matrix, and a to-be-tested pile foundation reaction analyzing basic equation, building different founding reaction models and programming a corresponding computerizing program, arranging the foundation pile foundation test device in the field, measuring horizontal displacement and turning angle, on the ground, of the to-be-tested pile, and computerizing and analyzing according to the computerizing program to determine corresponding foundation reaction model parameters. The foundation pile foundation test device comprises a standard beam, a standard pile, a reaction pile and the to-be-tested pile which are disposed on the ground, a jack and a force sensor are connected between the reaction pile and the to-be-tested pile, and a angle measuring device and a displacement measuring device are disposed on the to-be-tested pile. By on-site pile testing, multiple hypothesis models can be built for the foundation pile foundation, related model parameters can be determined, and certain universality is achieved.

The invention discloses an expressway traffic flow forecasting method based on time series. The expressway traffic flow forecasting method includes the steps of selecting one time scale, and carrying out statistics to build the traffic flow time series Q=(x); setting the value range of the number p of autoregression items and the number q of moving average items according to the selected time scale; solving the number p of the autoregression items and the number q of the moving average items; fitting the optimal number p of the autoregression items and the optimal number q of the moving average items through the maximum likelihood estimation in cooperation with the traffic flow time series Q to obtain an optimal ARMA model, and obtaining weight parameters of historical measured values and weight parameters of historical error values; solving the traffic flow forecasting series (please see the specifications) under the different time scales. By means of the expressway traffic flow forecasting method, an obtained time series model can better meet the requirement for forecasting various kinds of flow of an expressway, and the forecasting universality is improved; operation is simple, the forecasting efficiency is improved, the forecasting speed is increased, and the engineering requirement of traffic forecasting of the expressway is met.