211results about How to "Efficient sampling" patented technology

A method of valuation of large groups of assets using classification and regression trees is described. The method includes defining relevant portfolio segmentations, assessing performance of the classification and regression tree based model against a simple model and ranking all portfolio segments based upon performance of the models. Iterative and adaptive statistical evaluation of all assets and statistical inferences are used to generate the segmentations. The assets are collected into a database, grouped by credit variable, subdivided by ratings as to those variables and then rated individually. The assets are then regrouped and a collective valuation is established by cumulating individual valuations.

A trace detection system includes at least two stages coupled to operate in series. An ion mobility spectrometer (IMS) stage has a sampling inlet to receive a sample to be analyzed. An ion source ionizes the sample. The IMS applies an electrical field to the ionized sample to move the ionized sample toward an IMS outlet. A differential mobility spectrometer (DMS) stage coupled in series with the IMS stage receives the ionized sample from the IMS stage. Preferably, the system includes a mass spectrometer (MS) stage coupled in series with the DMS stage to receive the ionized sample from the DMS stage via a vacuum interface. A roughing vacuum pump evacuates a first stage of the MS stage to a first pressure below atmospheric pressure. A high vacuum pump evacuates a second stage of the MS stage to a second pressure below the first pressure.

A multi-band receiver for use with satellite ranging systems is provided. The receiver has a simplified architecture in which input signals of various frequencies are multiplexed together to form a single composite analog signal. In accordance with one embodiment of the invention, this composite signal only requires a single RF circuit for down conversion to an intermediate frequency. The composite, downconverted signal is sampled, and the digitized samples are demultiplexed to form digital counterparts of the original signals from each frequency band. An embodiment for use with elements of a phased array antenna is also provided.

The present invention provides methods for passive visualisation of invasive devices by employing a hyperpolarised solution of a high T1 agent having a T1 value of at least 5 seconds at a field strength in the range of 0.001-5 T and a temperature in the range of 20-40° C. Devices and instruments particularly useful for being employed in the methods are also provided as well as use of the methods in imaging, surgery and therapy.

A retractable brush structure is attached to a cylindrical rigid rod which in the closed position passes through a channel in an endoscope. After the brush passes through the endoscope, the brush moves against the tissue in order to remove cells from an area under examination. The brush is withdrawn from the endoscope and sample tissue is removed from said brush for examination after it is withdrawn from the endoscope.

A receiver for receiving a first usable frequency band and a second usable frequency band includes a band-pass filter device for filtering one or several receiving signals, a mixer device for converting the combination signal or the first band-pass filter signal and the second band-pass filter signal with a local oscillator signal, for obtaining a first intermediate frequency signal and a second intermediate frequency signal, and an intermediate frequency filter device for filtering the first intermediate frequency signal and the second intermediate frequency signal. Further, the receiver includes an analog/digital converter device for analog/digital converting the first filtered intermediate frequency signal and the second filtered intermediate frequency signal by using a single sampling frequency for obtaining a first digitized intermediate frequency signal and a second digitized intermediate frequency signal.

A method of valuation of large groups of assets by partial full underwriting, partial sample underwriting and inferred values of the remainder using an iterative and adaptive statistical evaluation of all assets and statistical inferences drawn from the evaluation and applied to generate inferred values. Individual asset values are developed and listed in tables so that individual asset values can be taken and quickly grouped in any desired or prescribed manner for bidding purposes. The assets are collected into a database, divided by credit variable, subdivided by ratings as to those variables and then rated individually. The assets are then regrouped according to a bidding grouping and a collective valuation established by cumulating the individual valuations.

A method of valuation of large groups of assets by partial full underwriting, partial sample underwriting and inferred values of the remainder using an iterative and adaptive supervised and unsupervised statistical evaluation of all assets and statistical inferences drawn from the evaluation and applied to generate the inferred asset values. Individual asset values are developed and listed in relational tables so that individual asset values can be rapidly taken from the tables and quickly grouped in any desired or prescribed manner for bidding purposes. The assets are collected into a database, divided into categories by credit variable, subdivided by ratings as to those variables and then rated individually. The assets are then regrouped according to a bidding grouping and a collective valuations established by cumulating the individual valuations.

The invention discloses a screening method for key geometric errors of a forming gear grinding machine based on a gear surface error model. The screening method comprises the following steps that step1, a gear surface error model is established, specifically, step 11, geometric errors are defined, step 12, the geometric errors are considered, and the pose transformation between a grinding wheel coordinate system and a gear coordinate system is calculated; and step 13, according to a forming conjugate grinding principle, the gear surface error model is established; and step 2, the key geometric errors which affect the grinding precision of a gear are screened, specifically, step 21, according to the gear surface error model, a first-order sensitivity index is used for representing the contribution rate of a single parameter to a model output variance, and a higher-order sensitivity index is used for representing the contribution rate of the coupling effect of multiple parameters to themodel output variance; meanwhile, the individual effect of the single parameter and the coupling effect with other parameters are considered, and a global sensitivity index is used for representing the comprehensive contribution rate of the parameter to the model output variance; and step 22, a modified Sobol method is adopted, and the first order sensitivity index and the global sensitivity index are calculated based on Monte-Carlos estimated valves.

A system and process uses pheromone propagation to provide direction and/or distance information to a remote destination through the use of localized decision making processes. Locally available information is exchanged and translated with global information through the use of a pheromone vocabulary and multi-layer grid systems. Self-organizing networks of sensors provide remote monitoring of a space.

Described herein is a sampling system and related sampling scheme. The system and sampling scheme is based upon a framework for adaptive non-uniform sampling schemes. In the system and schemes described herein, time intervals between samples can be computed by using a function of previously taken samples. Therefore, keeping sampling times (time-stamps), except initialization times, is not necessary. One aim of this sampling framework is to provide a balance between reconstruction distortion and average sampling rate. The function by which sampling time intervals can be computed is called the sampling function. The sampling scheme described herein can be applied appropriately on different signal models such as deterministic or stochastic, and continuous or discrete signals. For each different signal model, sampling functions can be derived.

Novel rapid, efficient sample collection systems, devices and methods are disclosed which remove and capture particles, and especially potential bioterrorism particles from surfaces into a liquid sample. The devices were developed primarily for obtaining samples of biological contamination from environmental surfaces. Biological particles, as described here, include bacteria, viruses, and other microorganisms, and other particles of biological origin including nucleic acids, proteins, and toxins.

The present invention belongs to an angle detection device, belonging to the detection technology field. The angle detection device comprises a rotary transformer and a signal processing device. The rotary transformer comprises at least four leads, where at least two of the leads are excitation leads, and at least two of the leads are signal leads. The signal processing device comprises: an excitation circuit configured to connect with the excitation leads and provide excitation signals for the excitation leads; a signal collection circuit configured to control the signal leads and collect position signals of the rotary transformer from the signal leads; and an angle calculation circuit configured to connect the signal collection circuit and calculate the rotation angle of the rotary transformer according to the position signals emitted by the signal collection circuit. The angle detection device can provide an efficient signal processing technology for an inductance rotary transformer, especially to an inductance rotary transformer having four leads consisting of two excitation leads and two signal leads to obtain accurate rotation angle of the rotary transformer.

The invention discloses a concrete sampling device, which comprises a bottom plate; rollers are fixedly mounted at two ends of two sides of the surface of the bottom of the bottom plate; supporting plates are fixedly connected to two sides of the surface of the top of the bottom plate; sliding chutes are formed in the inner walls of the supporting plates; a sliding plate is connected into the sliding chutes in a sliding manner; a motor box is fixedly mounted at the center of the surface of the top of the sliding plate; a motor is fixedly mounted at the center of the surface of the inner bottomof the motor box; and a power supply is arranged on the surface of the inner wall of the motor box. The invention relates to the technical field of sampling devices. The concrete sampling device canlift taken concrete in time, a through hole can timely dissipate heat generated by the motor box, damping springs can reduce noise generated when the motor operates, a concrete storing box and a sampling tool can be cooled, and meanwhile, a protective casing and a spiral blade can sample the concrete into the concrete storing box at higher efficiency, so that the working efficiency is improved.

The invention relates to an efficient soil sampling device so as to effectively solve the problems of inaccuracy in sampling, complicated operation and low sampling efficiency of the existing device.The efficient soil sampling device comprises a vertical rod, wherein an outer drum is arranged on the vertical rod; a shell is arranged in the outer drum; a torsional spring is arranged between the shell and the vertical rod; a material inlet is formed in the shell; a second sleeve is arranged on the vertical rod; a torsional spring is arranged between the second sleeve and the vertical rod; a third sleeve is arranged on the vertical rod; a convex block is arranged on the third sleeve; a bushing is arranged on the vertical rod; the bushing is located below; the third sleeve is fixed; a cavityof the shell is closed; the bushing drives the vertical rod, the shell, the outer drum and the second sleeve to rotate; the bushing moves upwards, and then the third sleeve is released and moves downwards; later, the torsional spring drives the third sleeve to rotate, and the cavity of the shell is opened; after moving downwards, the shell rotates; after the shell rotates, the cavity of the shellis closed. The efficient soil sampling device disclosed by the invention can efficiently sample soil at a specific depth, and the sample cannot be polluted by soil samples on other depth layers.

The invention belongs to the technical field of plant growth and analysis sampling and specifically relates to a sampling device for plant growth and tree ring analysis test. The sampling device comprises a drill bit, wherein the drill bit has a tubular structure with one end open; a zigzag blade is arranged at the front end, namely, the open end face, of the drill bit; an annular slot is formed in the inner wall of the drill bit and is close to the zigzag blade; a cutting tool is arranged in the annular slot; one end of the cutting tool is hinged with the annular slot; the cutting tool can swing toward the center of the drill bit or can be stored in the annular slot; when the cutting tool is stored in the annular slot, the nose of the cutting tool protrudes out of the inner wall of the drill bit, so as to form a barb-shaped structure; when the drill bit rotates forward, the cutting tool can be kept in the annular slot; when the drill bit rotates reversely, the cutting tool can be jacked up by a wooden core in the drill bit. According to the invention, a driving unit, such as a motor is used for driving the drill bit to forward and reversely rotate, when the drill bit rotates forward, the zigzag blade cuts the wooden core downward, and when the drill bit rotates reversely, the cutting tool pops up so as to cut off the wooden core, so that the sampling of the wooden core of a tree can be efficiently completed and research related to tree rings and response to global climate change can be performed.

A computer-implemented method for automated generation of test layouts for verifying a DRC deck. The method comprises receiving a first layout (L1) comprising one or more polygon shapes (P1) defined by a plurality of polygon parameters (W1,H1). Design rules (R1,R2) are received comprising inequality constraints (C) on the polygon parameters (W1,H1). A second lay-out (L2) is calculated by applying a random change (ΔW12) of value to at least one of the polygon parameters (W1) of the first layout (L1). A third layout (L3) is calculated by varying values of the polygon parameters (W1,H1) of the second layout (L2) until a respective slack (S1,S2) of the polygon parameters (W1,H1) with respect to one or more of the parameter boundaries (B1,B2) defined by the constraints is minimized The third layout (L3) may be stored as candidate test layout.

Systems and methods for obscuring data from a data source include devices and processes that may objectively measure the information loss for a dataset that is caused by applying a privacy policy, and may select and apply a policy to the dataset based on the measured information loss. The systems and methods may measure the information loss for a large dataset by taking a representative sample from the dataset and applying the policy to the sample in order to quantify the information loss. The quantified information loss can be iteratively used to change the policy in order to meet utility and/or privacy goals, and the system can subsequently apply the changed policy to the dataset.