An apparatus wherein a demand fluctuating substantially cyclically is divided into a plurality of sections having predetermined time intervals and wherein the demand is estimated for each section on the basis of the measured result of the demand in the section, characterized in that an adjusting section is set in the vicinity of the boundary between two sections adjoining each other, and that the estimation value of the demand in the adjusting section is compared with the respective estimation values of the two sections, so as to shift the boundary in the direction of widening the section which has the estimation value closer to the estimation value of the adjusting section. Thus, the demand in the vicinity of the boundary is estimated with the estimation value of the widened section, and it can be estimated at high precision.
A service estimation apparatus for an elevator adopting an estimated index with which service by the elevator can be estimated in any building and under any traffic state comprising a measurement apparatus to measure periods of service time and a microprocessor operating under program control to calculate a mean value and a variance of the periods of service time to set a reference value for designating a range of the periods of service time and to determine the estimated index, namely, an upper limit presumption value based on the mean value, the variance, and the reference value, and to determine an unachieved rate of service reference corresponding to the upper limit presumption value, the unachieved rate of service reference being a probability value at which the elevator periods of service time fall outside the range designated by the reference value.
A resource allocation system for indicating the optimum allocation of a resource between a series of demands iteratively processes the probability data for each demand to determine for each of a range of amounts of resource available the optimum distribution of the resource between the demands and the resultant probability of successfully overcoming all the demands. The system may be used to predict the probability of success where there is a limited resource available and a predicted series of demands, but it may also be used to assess non-predicted threats and to determine an updated optimum distribution and resultant probability.
A method and an apparatus for the concurrency control in the database system, in which each transaction can be executed properly according to its scale. In the apparatus, a processing time for each transaction is estimated, a timestamp appropriate for each transaction is determined from the estimated processing time and a current time, and a concurrency control is carried out according to the determined timestamps for the transactions to be executed concurrently.
A method and apparatus are provided for monitoring an energy management system which controllably drops load in response to preselected conditions. The apparatus periodically interrupts the energy management system to restore full load. The apparatus monitors energy usage immediately prior to interrupting the energy management system and also monitors the energy usage during interruption when the load is restored. The information gathered at these two times represents the actual energy used when the energy management system is conserving energy, and when the energy management system is disabled and full energy usage is realized. The difference between the two energy usages represents the energy savings realized by using the energy management system.
Tactical routing apparatus e.g. for an aircraft comprises stores for storing data representing the geographical domain through which the aircraft is to pass and data representing the location and type of a plurality of threats (e.g. gun or missile sites), and a processor for determining and displaying on a V.D.U. the optimal route connecting two points and the probability of successfully completing the route.
