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414 results about "Substitution method" patented technology

In optical fiber technology, the substitution method is a method of measuring the transmission loss of a fiber. The substitution method has certain shortcomings with regard to its accuracy, but its simplicity makes it a popular field test method. It is conservative, in that if it were used to measure the individual losses of several long fibers, and the long fibers were concatenated, the total loss obtained (excluding splice losses) would be expected to be lower than the sum of the individual fiber losses.

Method for forming microelectronic spring structures on a substrate

A method for fabricating microelectronic spring structures is disclosed. In an initial step of the method, a layer of sacrificial material is formed over a substrate. Then, a contoured surface is developed in the sacrificial material, such as by molding the sacrificial material using a mold or stamp. The contoured surface provides a mold for at least one spring form, and preferably for an array of spring forms. If necessary, the sacrificial layer is then cured or hardened. A layer of spring material is deposited over the contoured surface of the sacrificial material, in a pattern to define at least one spring form, and preferably an array of spring forms. The sacrificial material is then at least partially removed from beneath the spring form to reveal at least one freestanding spring structure. A separate conducting tip is optionally attached to each resulting spring structure, and each structure is optionally plated or covered with an additional layer or layers of material, as desired. An alternative method for making a resilient contact structure using the properties of a fluid meniscus is additionally disclosed. In an initial step of the alternative method, a layer of material is provided over a substrate. Then, a recess is developed in the material, and fluid is provided in the recess to form a meniscus. The fluid is cured or hardened to stabilize the contoured shape of the meniscus. The stabilized meniscus is then used to define a spring form in the same manner as the molded surface in the sacrificial material.
Owner:FORMFACTOR INC

Advertisement proxy method and advertisement proxy mediating system

An advertising media information mediating system is provided which uses a computer system for providing an advertising service substitution method and in which an advertisement requester can register advertisement request conditions on an advertising media information mediating server through a simple operation, whereas an advertising agent substitute, who executes an advertisement on behalf of the advertisement requester, can register advertising service substitution conditions on the advertising media information mediating server through a simple operation, whereby the advertisement requester and the advertising agent substitute can select an advertising transaction partner which can meet conditions desired by the advertisement requester and the advertising agent substitute from a variety of selection targets via a network without spending much time, the advertising service substitution method being such that the advertisement requester registers advertisement request conditions, whereas the advertising agent substitute registers advertising service substitution conditions, whereby when the advertisement requester and the advertising agent substitute come to an agreement based on the advertising service substitution conditions and the advertisement request conditions so registered, the advertisement requester pays part of or the whole of expenditures for an advertising material and advertisement using the same, whereas the advertising agent substitute executes an advertisement on behalf of the advertisement requester by wearing, using, displaying, selling, lending or distributing the advertising material.
Owner:KAMIYAMA FUTOSHI

Method and device for robust interval wind power scheduling based on consideration on wind power field current collecting line fault

The invention relates to a method and a device for robust interval wind power scheduling based on consideration on wind power field current collecting line fault. The method includes, from the points of power system dynamic response capacity and section safety, building a worst scene model with consideration on system running safety on the circumstance of wind power field current collecting line m faults; according to the worst scene model, taking the minimum wind curtailment demand as the target to optimize the model and taking the system running safety requirement on the circumstance of the worst wind power output as a constraint condition to build a robust dual-layer wind power mixed integer interval optimization model; according to a variable equivalent substitution method and a strong dual principle of linear programming, transforming the robust dual-layer wind power mixed integer interval optimization model into the problem about single-layer secondary programming, and utilizing an interior point method to solve the optimal thermal power output planned value and the maximum wind power planned interval; and finally performing wind power scheduling according to the optimal thermal power output planned value and the maximum wind power planned interval so as to achieve the robust interval wind power scheduling.
Owner:STATE GRID CORP OF CHINA +1

Three-phase load flow calculation method of weak looped distribution network comprising multi-type distributed power sources

The invention discloses a three-phase load flow calculation method of a weak looped distribution network comprising multi-type distributed power sources. Firstly, the effective three-phase load flow calculation method of a weak looped distribution network is put forward in a distribution sequencing network based on a sequence component calculation method and in combination with characteristics of the weak looped distribution network and a loop analysis of a road. Secondly, detailed formula derivation of iterative computation of distributed generation (DG) of a PQ node type, a PQ (V) node type, an OV node type and a PI node type is conducted and the easy formula is introduced into the load flow calculation method. The three-phase load flow calculation method of the weak looped distribution network comprising the multi-type distributed power sources can effectively process multi-type DG and the weak looped distribution network and is distinct in calculation procedure, simple in programming, and easy to achieve. In addition, the three-phase load flow calculation method of the weak looped distribution network comprising the multi-type distributed power sources retains strong points of rapid calculation and stable convergence of a forward-back substitution method catering to branch circuits. Finally, effectiveness and good convergence of the three-phase load flow calculation method of the weak looped distribution network comprising the multi-type distributed power sources is tested and verified by means of a IEEE (institute of electrical and electronic engineers)-37 generatrix test calculation case, and the three-phase load flow calculation method of the weak looped distribution network comprising the multi-type distributed power sources has good ability of processing the multi-type DG and the looped network.
Owner:HOHAI UNIV

Distributed photovoltaic power distribution network planning method based on improved particle swarm

The invention provides a distributed photovoltaic power distribution network planning method based on an improved particle swarm. The method comprises the steps of building a power distribution network structure model and initializing particle swarm algorithm parameters; determining a clustering result according to load information of each node to generate an initial swarm; calculating distributedphotovoltaic total daily output data of each node of a power distribution network in each period of time by sampling a photovoltaic typical daily output curve and a regional typical daily load curve;building a target function model according to the loss of the power distribution network and a voltage of each node; for particles in the swarm, performing power flow and network loss calculation byapplying a forward and backward substitution method to build an optimization model; updating the positions of the particles according to preset parameters through an iterative result, and re-evaluating the fitness values of the particles; and if the particles reach a maximum iterative frequency condition, outputting an optimal solution, namely, the current optimal solution of the swarm at the endof iteration, otherwise, re-planning an installation scheme. According to the method, more distributed photovoltaic power generation systems can be installed at grid connection points under the condition that the voltage does not exceed a limit, so that the electricity utilization requirements are met.
Owner:WUHAN UNIV OF TECH
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