초록 ▼

A system is provided for asymmetrically maintaining system operability that includes a first processing element and a second processing element coupled to the first processing element by a communication link. The first processing element is operable to perform at least one function. The second proce

A system is provided for asymmetrically maintaining system operability that includes a first processing element and a second processing element coupled to the first processing element by a communication link. The first processing element is operable to perform at least one function. The second processing element is operable to perform at least one function of the first processing element in the event the first processing element fails, and further operable to expect and receive keepalive inquiries at an expected rate from the first processing element and to send responses in response to the inquiries to the first processing element. The second processing element is further operable to take remedial action after not receiving any inquiries within a first predetermined time period. In another embodiment of the present invention, the first processing element is operable to take remedial action after not receiving any response to any inquiries sent within a second predetermined time period, wherein the first predetermined time period is larger than the second predetermined time period. In other embodiments of the present invention, the first and second processing elements are routers.

대표청구항 ▼

A system is provided for asymmetrically maintaining system operability that includes a first processing element and a second processing element coupled to the first processing element by a communication link. The first processing element is operable to perform at least one function. The second proce

A system is provided for asymmetrically maintaining system operability that includes a first processing element and a second processing element coupled to the first processing element by a communication link. The first processing element is operable to perform at least one function. The second processing element is operable to perform at least one function of the first processing element in the event the first processing element fails, and further operable to expect and receive keepalive inquiries at an expected rate from the first processing element and to send responses in response to the inquiries to the first processing element. The second processing element is further operable to take remedial action after not receiving any inquiries within a first predetermined time period. In another embodiment of the present invention, the first processing element is operable to take remedial action after not receiving any response to any inquiries sent within a second predetermined time period, wherein the first predetermined time period is larger than the second predetermined time period. In other embodiments of the present invention, the first and second processing elements are routers. es of the first and second periods. 2. The method of claim 1 further including determining an energy amount to be produced in each pulse and determining a duration for each pulse. 3. The method of claim 1 further including a stop time for each of the first and second periods, wherein the stop time of the first period occurs before the start time of the second period. 4. The method of claim 3 wherein the at least one pulse in the first period is of the same duration and energy as the at least one pulse in the second period. 5. The method of claim 4 wherein there are an equal number of pulses in the first and second periods. 6. The method of claim 3 wherein the at least one pulse in the first period differs in duration from the at least one pulse in the second period. 7. The method of claim 3 wherein there are a different number of pulses in the first and second periods. 8. The method of claim 1 further including a third period, wherein no light is projected towards the pixel panel during the third period. 9. An imaging system for projecting light onto a subject during photolithographic processing, the apparatus comprising: a light source operable to project light in pulses; a pixel panel to selectively direct the projected light towards the subject; a processor connectable to the light source; a memory accessible to the processor; and software stored in the memory, the software comprising a plurality of instructions for: determining at least a first period and a second period during which the pixel panel directs the projected light towards the subject, the first and second periods each having a start time; during the first period, projecting the light in at least one pulse towards the pixel panel at a first begin time relative to the start of the first period and halting the projection of light at a first end time relative to the start of the first period; during the second period, projecting the light in at least one pulse towards the pixel panel at a second begin time relative to the start of the second period and halting the projection of light at a second end time relative to the start of the second period; and determining an interval between the first end time and the second begin time wherein the interval duration is variable and wherein the first and second begin times are not synchronized relative to the start times of the first and second periods. 10. The system of claim 9 wherein the light source is a laser diode operating in pulse mode. 11. The system of claim 9 wherein the software further includes instructions for regulating the energy produced during each pulse. 12. The system of claim 9 wherein the software further includes instructions for regulating the duration of each pulse. 13. A method for non-synchronously projecting light pulses in a plurality of sequential periods in a photolithography system, the method comprising: defining a length of time for each of the plurality of periods, each of the periods having a period start time; determining an energy and a duration for each of the light pulses in each of the periods; projecting the light pulses non-synchronously during the plurality of periods, the projection beginning at a pulse start time after the period start time of each period and the projection ending at a pulse stop time, so that wherein the pulse start time for each period is not synchronized with the pulse start times of the other periods; and creating an interval time between the pulse stop time and the pulse start time for the next period in the plurality wherein the interval time varies between each of the plurality of periods. 14. The method of claim 13 further including setting the energy and duration of each pulse as constant. 15. The method of claim 14, wherein each period includes a constant number of pulses. 16. The method of claim 13 wherein the sum of pulse energy in each period is equal. 17. The method of claim 1 wherein there are a plurality of pulses in each of the first and second periods. 18. The method of claim 1 further including determining a transition state during which the pixel panel selectively changes between directing projected light toward the subject and directing projected light away from the subject, wherein the transition state occurs at least once after the first period and before the second period. 19. The method of claim 18 the light source projects no light pulses during the transition state. y1) with regard to the measured value of said at least one process variable (y1,y2), and providing a control signal (uFB) based on said predictions, and by means of a first control law. The method comprises the further steps of measuring a measurable disturbance (d) in the process, predicting future deviations of said process variable (y1) with regard to said disturbance but without regard to the measured value of said at least one process variable (y1,y2), and providing a control signal (ud) based on said predictions by means of a second control law. signal using the third encryption key, the first controller calculating an expected response by encrypting the random number from the random number generator using the second encryption key, the first controller responding to the challenge response signal when the encrypted random number of the challenge response signal matches the expected response. 9. A method of operation of a passive function control system of a vehicle, the method comprising the steps of: providing a challenge signal which includes a random number and an identification code; encrypting at least a portion of the random number and at least a portion of the identification code of the challenge signal; transmitting the challenge signal from a vehicle based transceiver; receiving the challenge signal at a portable transceiver; decrypting the encrypted portions of the challenge signal; comparing the identification code to a reference identification code; transmitting a challenge response signal, having the random number, only in response to identification code comparison indicating a match; receiving the challenge response signal at the vehicle based transceiver; and responding to the challenge response signal when the random number of the challenge response signal is related to the random number. 10. The method as defined in claim 9 wherein the step of encrypting at least a portion of the identification code includes the steps of: providing the identification code having most significant bits and least significant bits; and encrypting the most significant bits of the identification code. 11. The method as defined in claim 10 further including the steps of: providing the reference identification code with most significant bits and least significant bits; comparing the least significant bits of the identification code to the least significant bits of the reference identification code; and comparing the most significant bits of the identification code to the most significant bits of the reference identification code only in response to least significant bit comparison indicating a match. 12. The method as defined in claim 9 wherein the step of responding to the challenge response signal includes the step of: outputting a function signal. 13. The method as defined in claim 9 further including the steps of: sensing for a user's proximity to the vehicle; providing a proximity signal in response to sensing a user's proximity; and providing the challenge signal in response to the proximity signal. 14. The method as defined in claim 9 wherein the step of transmitting the challenge signal from a vehicle based transceiver includes the step of: transmitting a low frequency signal. 15. The method as defined in claim 9 wherein the step of transmitting a challenge response signal includes the step of: transmitting a radio frequency signal. 16. The method as defined in claim 9 further including the steps of: encrypting at least a portion of the random number of the challenge response signal in the portable transceiver; calculating an expected response in the vehicle based transceiver by encrypting the random number; and responding to the challenge response signal when the encrypted random number of the challenge response signal matches the expected response. ght reflected from the retroreflectors. The timing element measures a time interval between the output of the laser diode and the detection of light and supplies a corresponding output signal to a computer in order to determine the range of the target vehicle relative to the chase vehicle. herein the nutrient components includes at least the nucleic acid material content. 13. A system for determining customized feed for at least one animal, the system comprising: a first memory portion configured to store animal data representative of the characteristics of the animal; a second memory portion configured to store feed data representative of feed ingredients; a third memory portion configured to store evaluation data representative of at least one evaluation criteria; and a data processing circuit in communication with the first, second and third memory portions and configured to generate a nutritional profile including a desirable nucleic acid material content for the animal based upon the animal data, the data processing circuit being further configured to generate formulation data representative of a combination of feed ingredients, the formulation data being generated by the data processing circuit based upon at least one of the nutritional profile data, the feed data, and the evaluation data. 14. The system of claim 13, wherein the animal data is representative of at least one of a beginning weight of the animal, a desired weight of the animal, an environment of the animal, a production state of the animal, a health state of the animal, a feed form, and an actual or desired production level of the animal, and a relationship of animal muscle to fat of the animal. 15. The system of claim 14, wherein the health state of the animal includes at least one of a healthy state, a weaning state, an illness state, and a challenged state. 16. The system of claim 13, wherein the feed ingredients include at least one of a grain source, a protein source, a vitamin source, a mineral source, a fat source and a nucleic acid material source. 17. The system of claim 13, wherein the evaluation criteria includes at least one of animal production rate, cost of feed per unit animal weight gain, and feed weight per unit animal weight gain. 18. The system of claim 13, wherein the evaluation data is representative of at least two evaluation criteria. 19. The system of claim 18, further comprising a fourth memory portion in communication with the data processing circuit, the fourth memory portion being configured to store optimization weighting data representative of the effect a respective evaluation data has on the generation of the formulation data, the data processing circuit further generating the formulation data based upon the optimization weighting data. 20. The system of claim 19, wherein the optimization weighting data may be selected to cause one of the evaluation criteria to have no effect on the generation of the formulation data. 21. The system of claim 13, wherein the memory portions are portions of a digital memory and a parallel data bus in coupled between the digital memory and the data processing circuit to facilitate communication. 22. The system of claim 13, wherein the memory portions are portions of a plurality of digital memories and a network couples the digital memories to the data processing circuit to facilitate communication. 23. The system of claim 13, wherein the nutritional profile data is representative of at least two nutrient components, and the system further includes a fifth memory portion in communication with the digital processor, the fifth memory portion storing variation data representative of a range for the nutrient components of the nutritional profile and the digital processor generates a set of formulation data based upon the variation data. 24. The system of claim 23, wherein the nutrient components includes at least the nucleic acid material content. 25. A system for determining customized feed for at least one animal, the system comprising: first memory means for storing animal data representative of the characteristics of the animal; second memory means for storing feed data representative of feed ingredients; third memory means for storing evaluation data representative of