Engineering
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Fast and Accurate Quantum Chemistry Simulations via Multiobjective Genetic Algorithms
Embodiments of the present invention provide, among other things, methods, apparatus, and systems for tuning a semiempirical process for predicting energy...
Embodiments of the present invention provide, among other things, methods, apparatus, and systems for tuning a semiempirical process for predicting energy for different molecular configurations. In an example method, an energy value and an energy gradient are determined for each of a plurality of molecular configurations using an accurate method. A functional form of the semiempirical process is optimized using the determined energy values and energy gradients via multiobjective optimization. The functional form relates one or more parameters to energy values and energy gradients. |
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A Technique for Improving Performance by Preexecuting Instructions within a Simple Processor Pipeline
A processor triggers a first advanced execution processing pass to an instruction sequence in response to a first stalled instruction and initiates...
A processor triggers a first advanced execution processing pass to an instruction sequence in response to a first stalled instruction and initiates execution of a further instruction in the instruction sequence that stalls during the performance of the first advanced execution processing pass. A second advanced execution pass is performed through the instruction sequence in which the further instruction is processed again to provide a valid result after stalling. In one form, the first instruction is performed while the processor operates in a normal execution mode and the first and second advanced execution processing passes are performed while the processor operates in an advance execution mode. |
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Adaptive Time Continuation in Competent Genetic and Evolutionary Algorithms
Methods and systems for optimizing a solution set. A solution set is generated, and solutions in the solution set are evaluated. Desirable solutions from...
Methods and systems for optimizing a solution set. A solution set is generated, and solutions in the solution set are evaluated. Desirable solutions from the solution set are selected. A structural model is created using the desirable solutions, and a surrogate fitness model is created based on the structural model and the desirable solutions. A new solution set may be generated and/or evaluated, based on analyzing at least one of the structural model and the surrogate fitness model, and determining a method for generating a new solution set and/or evaluating the new solution set based at least in part on the analyzing. |
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A Symmetric Digital Chaotic Cryptosystem: The Alpcan Chaotic Cipher (ACC)
A symmetric cryptosystem uses cascaded chaotic maps to encrypt plaintext and decrypt ciphertext. Received plaintext is encrypted using the cascaded chaotic...
A symmetric cryptosystem uses cascaded chaotic maps to encrypt plaintext and decrypt ciphertext. Received plaintext is encrypted using the cascaded chaotic maps to generate a ciphertext. The ciphertext can then be decrypted using the same cascaded chaotic maps in order to retrieve the plaintext. |
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iWatcher: Simple and General Architectural Support for Software Debugging
Methods and systems for memory monitoring. A triggering access is detected at one or more monitored memory regions. When a triggering access is detected, a...
Methods and systems for memory monitoring. A triggering access is detected at one or more monitored memory regions. When a triggering access is detected, a function is accessed for determining a monitoring function, and a monitoring function associated with a particular triggered memory location address is automatically determined. |
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Scalable System Software for a Gigabit Active Router
In the present scalable system routing method, received packets are associating with threads for processing the received packets. While a previously...
In the present scalable system routing method, received packets are associating with threads for processing the received packets. While a previously received packet is being processed, arrival of an interrupt is checked. If there is an interrupt, a thread is created associating the interrupt is created. Then, a determination of whether the thread associated with the interrupt has a priority that is higher than the priority of a thread associated with the previously received packet is made. If the thread associated with the interrupt has a higher priority than the previously received packet, the thread associated with the previously received packet is saved in a Shared Arena storage area. However, if the thread associated with the interrupt does not have a higher priority than the previously received packet, the thread associated with the interrupt is queued. Because threads are attached to the packets, the threads can now be suspended and resumed without having to disable interrupts, which includes periods during a context switch. As a result, a more flexible and efficient scheduling routing method can be implemented. |
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Method for Allocating Multiple Authentication Certificates to Vehicles in a Vehicle -to-Vehicle Communication Network
In a vehicle-to-vehicle communication network utilizing PKI security methods to protect communications and in which the PKI encryption utilizes a...
In a vehicle-to-vehicle communication network utilizing PKI security methods to protect communications and in which the PKI encryption utilizes a Certificate Authority having both a private key and a publicly distributed key, a method for allocating multiple certificates for each vehicle which are assigned to each vehicle in the communication network. The method includes the step of assigning a unique secret key k to each vehicle in the communication network. The Certificate Authority then creates a plurality of public key and private key encryption pairs for each vehicle and each encryption pair is associated with an index i. A plurality of certificates are then created with one certificate for each value of the index. A revocation list comprising the secret keys is maintained by the Certificate Authority so that all encryption pairs assigned to a particular vehicle may be revoked by the secret key k corresponding to that vehicle. |
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The power of EM wave will get attenuated as it travels through the air. Therefore, by the time it ends up getting picked up by the receiver, the power level usually is... The power of EM wave will get attenuated as it travels through the air. Therefore, by the time it ends up getting picked up by the receiver, the power level usually is below the detection threshold, as processing of the attenuated signal occupies the majority of the front-end receiver and thus conumes large amounts of energy. Instead of amplification (power), the invention uses chirp conversion technique which takes a chunk of input wave and compresses all the energy into a small space. |
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