84 results about "Fuzzy logic algorithm" patented technology

A method for protecting a network from an attack includes measuring a property of traffic entering the network, and analyzing the property using at least one fuzzy logic algorithm in order to detect the attack.

A method is provided for enterprise management and bundling of radio, outdoor and entertainment inventory to achieve maximum revenue on perishable products. An electronic data-mart 110 or central information storage and data processing system is established to collect influencing factors for the probability and price sensitivity of a particular advertising buyer 120. The data-mart 110 also collects business rules for inventory scaling, available inventory to sell, budget (goal) information, advertiser payment history, and station performance data to feed to a scenario planner 130. Once three or more variables exist, inventory and pricing fuzzy logic algorithms create scenario plans to present the most profitable bundle of offerings. The scenarios are typically pre-approved although presented to the local business units 150 for an abnormality failsafe. Once processed by the local business units 150, the scenarios are presented to the advertising buyer 120. Negotiations typically take place which cause for the process to restart. The main systems that interact to build these scenarios are: an enterprise data-mart 110, a scenario planner 130, a performance measure system 170, a rate or yield management subsystem 160, a traffic and accounts receivable system 180 and a similarly configured local inventory booking system 190. A business rules engine provides the local rule definitions for scaling inventory and price to provide for the most profitable combination.

The invention discloses a temperature control method for a proton exchange membrane fuel cell system for a vehicle, which comprises the following steps of: detecting the inlet temperature of a cooling loop of a fuel cell stack by using a temperature sensor, inputting the inlet temperature into a controller, and achieving cooling fan control based on the controller, wherein the cooling fan control comprises fuzzy logic adaptive proportional integral control and feedforward compensation control, a gain parameter of the proportional integral control is adaptively updated by a fuzzy logic algorithm, the load current of the fuel cell is used as disturbance and is used for feedforward compensation, and meanwhile, the opening degree of the fan is determined by the total heat dissipating capacity demand and the number of cooling fans; and finally, inputting a control signal output by the controller into an actuator of a thermal management subsystem to control the temperature of the cooling inlet of the fuel cell stack. The temperature control strategy provided by the invention can reduce the temperature fluctuation during the operation of the vehicle fuel cell engine, improve the system performance and prolong the service life.

The invention provides an intelligent wheelchair outdoor navigation method based on coordinated control. The method is characterized by acquiring external environment information by a GPS (global positioning system) and ultrasonic sensors, firstly adopting a control method based on behaviors to coordinate with a fuzzy logic algorithm to design behavior modules with different functions, secondly adopting a neural network algorithm to design a behavior coordination controller, and realizing the autonomous navigation function with higher intelligence through the coordinated control of the behavior modules. The method has the advantages that the cost of the outdoor navigation system can be lowered; and the real-time property and the robustness of the system can be improved.

Normal and abnormal diurnal cortisol secretion patterns are identified from human saliva samples by an in vitro method. First and second saliva samples are taken from one human individual at first and second predetermined times during the same day. A first cortisol concentration is determined in the first saliva sample, and a second cortisol concentration is determined in the second saliva sample. An abnormal secretion pattern is then compared to a normal secretion pattern with the help of a fuzzy logic algorithm. A function of the hypothalamic-pituitary-adrenal (HPA) axis is then determined for the human individual. Optionally, a testosterone level is determined from one of the samples and is used in combination with the cortisol concentrations to provide a redefined determination.

An elevator system includes a controller that uses one of a plurality of fuzzy logic algorithms for assigning an elevator car to service a passenger request. One example uses a passenger's desired destination as indicated by the passenger service request prior to the passenger entering an elevator car. One example includes multiple fuzzy logic algorithms, each corresponding to a particular relationship between an elevator car's current assignments, a passenger's desired destination, a source landing of the passenger's request, or a combination of them.

A process for the custom design and automated, custom manufacture of golf clubs. According to a first embodiment, a computer user interface, preferably a graphical user interface (GUI), guides a user's selection of preferred golf club design parameters. According to a second embodiment, input data about a golfer's style of play and golf club performance needs are captured from data collection systems, and analyzed by black box algorithms, preferably fuzzy logic algorithms, to infer golf club design parameters. After preferences for, or inferences about, golf club design parameters are developed in accordance with the two embodiments, a computer aided (CA) system is used to design and manufacture the desired golf clubs.