摘要:
A method for evaluating a head and trunk movement pattern of a subject includes configuring a plurality of markers to move together with the body of a subject. For each of the plurality of markers, a locus curve in three-dimensional space is detected as a function of time and the locus curve is stored as a data field of a measured data record that is common to the plurality of markers. The movement pattern of the body of the subject is characterized using characteristic variables derived from the measured data record. Reference variables are derived from a stored plurality of reference data records. Each of the characteristic variables is compared with the reference variables derived from the stored reference data records. Each of the characteristic variables is derived from a projection of the locus curve of at least one of the markers onto one of the three datum planes of a Cartesian coordinate system. It is thus possible to interpret the evaluated kinetic pattern and use this information to provide a diagnostic of the basic clinical picture, especially following psychic, psychosomatic and/or neurological disorders.
摘要:
An interface device and method for interfacing instruments to a vascular access simulation system serve to interface peripherals in the form of mock or actual medical instruments to the simulation system to enable simulation of medical procedures. The interface device includes a catheter unit assembly for receiving a catheter needle assembly, and a skin traction mechanism to simulate placing skin in traction or manipulating other anatomical sites for performing a medical procedure. The catheter needle assembly and skin traction mechanism are manipulated by a user during a medical procedure. The catheter unit assembly includes a base, a housing, a bearing assembly and a shaft that receives the catheter needle assembly. The bearing assembly enables translation of the catheter needle assembly, and includes bearings that enable the shaft to translate in accordance with manipulation of the catheter needle assembly. The shaft typically includes an encoder to measure translational motion of a needle of the catheter needle assembly, while the interface device further includes encoders to measure manipulation of the catheter needle assembly in various degrees of freedom (e.g., translation, pitch and yaw) and the skin traction mechanism. Alternatively, the shaft may include an additional encoder to measure translational motion of an instrument inserted through the catheter needle assembly. The simulation system receives measurements from the interface device encoders and updates the simulation and display, while providing control signals to the force feedback device to enable application of force feedback to the catheter needle assembly.
摘要:
A reusable model of a three-dimensional object is created on a computer system. The reusable model includes model objects and internal constraints on the model objects. The internal constraints maintain the structure of the reusable model with respect to the three-dimensional object. The reusable model can have inputs that accept directed and non-directed external constraints with models using the reusable model. The inputs define the direct methods for modifying the structure of the reusable model. The reusable model can have outputs that have directed constraints with models using the reusable model. The outputs provide a direct method for using the structure of the reusable model to modify the structure of the model using the reusable model. Nondirected constraints may be associated between the model using the reusable model and the reusable model to position the reusable model in the model.
摘要:
Abnormal flows in an extractor are simulated, with a flow divider model and a flow merger model being introduced. Overflow state, entrainment occurrence state, and reflux state in the extractor are simulated. Moreover, abnormal flows under a variety of conditions are simulated efficiently by using object-oriented software as the simulation program.
摘要:
A method for designing a variable cycle gas turbine engine having a fan assembly with a maximum air flow there through and a maximum pressure ratio there across during operation at a fan speed and a plurality of variable pitch vanes, which method includes the steps of selecting a first operating point of the variable cycle gas turbine engine at a fan speed having about maximum air flow through the fan assembly at a pressure ratio substantially less than maximum pressure ratio and selecting a second operating point of the variable cycle gas turbine engine at about the fan speed, wherein the second operating point has about the maximum pressure ratio across the fan assembly at an air flow through the fan assembly substantially less than the maximum air flow. A reference point having a reference air flow through the fan assembly and a reference pressure ratio across the fan assembly is selected. The geometry of the variable pitch vanes is determined so that the variable pitch vanes can operate at the reference point without stalling.
摘要:
A system and method for predicting the effect of patient self-care actions on a disease control parameter. A future disease control parameter value X(tj) at time tj is determined from a prior disease control parameter value X(ti) at time ti based on an optimal control parameter value R(tj) at time tj, the difference between the prior disease control parameter value X(ti) and an optimal control parameter value R(ti) at time ti, and a set of differentials between patient self-care parameters having patient self-care values SM(ti) at time ti and optimal self-care parameters having optimal self-care values OM(ti) at time ti. The differentials are multiplied by corresponding scaling factors KM. The system includes an input device for entering the patient self-care values SM(ti). A memory stores the optimal control parameter values R(ti) and R(tj), the prior disease control parameter value X(ti), the optimal self-care values OM(ti), and the scaling factors KM. A processor in communication with the input device and memory calculates the future disease control parameter value X(tj). A display is connected to the processor to display the future disease control parameter value X(tj) to a patient.
摘要:
A method and system for engineering a drilling bit program linked to rock removal at a cutting element/formation interface and specific to drilling of one or more wells in a given geographic area is disclosed. The system includes a first arrangement for planning the drilling of a particular well based upon a cascaded planning input and providing an engineered output which is a function of the cascaded planning input, wherein a level of the engineered output being dependent upon a level of the cascaded planning input. A second arrangement is provided for implementing the engineered output in the drilling of the particular well is also provided. Lastly, a third arrangement is provided for evaluating the implementation of the engineered output for the drilling of the particular well and providing an evaluation output. The evaluation output can be used by the planning arrangement as additional planning input for planning the drilling of a subsequent well in the geographic area.
摘要:
The present invention provides a method for evaluating a surface quality of a simulated stamping which includes the steps of obtaining a CAD model of a desired part, calculate and display at least one image of true reflect line on the CAD model, obtaining a blank mesh representative of the part before the part is formed, and processing the blank mesh with a springback simulation software to obtain a deformed finite element analysis springback blank. True reflect lines are then calculated and displayed on the deformed FEA springback blank, and the reflect lines are compared with the true reflect lines on the CAD model to determine variance of the deformed springback blank with the CAD model.
摘要:
A method for simulating the formation of an adhesive joint and/or for determining the attributes of the adhesive joint is disclosed. The method allows an individual or business enterprise to consistently and reliably determine a proper amount and placement of adhesive used to form the joint.
摘要:
A set of specially-configured LUT's are used in a rasterizing portion of a graphics system for simulating Sensor-assisted Perception of Terrain (SaPOT) so that simulation of the image produced by a given sensor can proceed rapidly and with good accuracy at a per-texel level of resolution. More specifically, terrain texels-defining memory is provided with a plurality of addressable texel records where each record contains: (a) one or more material identification fields (MID's); (b) one or more mixture fields (MIX's) for defining mixture proportions for the materials; and (c) slope-defining data for defining a surface slope or normal of the corresponding texel. A sky-map LUT is provided for simulating the act of looking up to the sky along the normal surface vector of a given texel to thereby obtain a reading of the sky's contribution of illumination to that terrain texel. A reflectance LUT is provided for simulating the act of reflecting filtered radiation (light) off the material surface of the given terrain texel to thereby obtain a reading of the amount of light that the surface of the texel will reflect. The reflectance and sky contribution factors are multiplied to obtain a per-texel signal representing the amount sensor-detectable light produced from each terrain texel. A generally similar approach is taken to determine what amount of sensor-detectable, black body radiation will be produced from each terrain texel. Each terrain texel is simulated as having a specifiable mixture of plural surface materials. Each terrain texel is allowed to be shadowed during different times and the per-texel shadowing is accounted for.