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696 results about "Direct effects" patented technology

Direct effect. A chemical effect caused by the direct transfer of energy from ionizing radiation to an atom or molecule in a medium.

Local Causal and Markov Blanket Induction Method for Causal Discovery and Feature Selection from Data

In many areas, recent developments have generated very large datasets from which it is desired to extract meaningful relationships between the dataset elements. However, to date, the finding of such relationships using prior art methods has proved extremely difficult especially in the biomedical arts. Methods for local causal learning and Markov blanket discovery are important recent developments in pattern recognition and applied statistics, primarily because they offer a principled solution to the variable/feature selection problem and give insight about local causal structure. The present invention provides a generative method for learning local causal structure around target variables of interest in the form of direct causes/effects and Markov blankets applicable to very large datasets and relatively small samples. The method is readily applicable to real-world data, and the selected feature sets can be used for causal discovery and classification. The generative method GLL-PC can be instantiated in many ways, giving rise to novel method variants. In general, the inventive method transforms a dataset with many variables into either a minimal reduced dataset where all variables are needed for optimal prediction of the response variable or a dataset where all variables are direct causes and direct effects of the response variable. The power of the invention and significant advantages over the prior art were empirically demonstrated with datasets from a diversity of application domains (biology, medicine, economics, ecology, digit recognition, text categorization, and computational biology) and data generated by Bayesian networks.
Owner:ALIFERIS KONSTANTINOS CONSTANTIN F +1

Multi-zonal detection of explosives, narcotics, and other chemical substances

A multi-zonal system and method for detecting contraband substances associated with a human subject. Objects containing such substances may be carried by the subject or in a garment worn by the subject, or as vapors entrained by the subject's garments. Alternatively, the substance may be present as small particles or residues present on skin, garment fibers, or the like that may be dislodged from the subject or his immediate effects. The system comprises: (i) an examination station through which the subject passes; (ii) sample generation means to produce a sample for analysis, comprising a plurality of air jets disposed in the examination station to impinge flowing gas onto pre-selected zones on the subject; (iii) collection means operative to acquire and convey the sample, comprising a plurality of collection ports disposed in the examination station to receive gas deflected by the subject from the air jets; (iv) analysis means in communication with the collection means to receive the sample and carry out a chemical analysis to detect the contraband substances; and (v) signal means operably connected to the analysis means for indicating detection of the contraband substances. Preferably the system employs a chemiluminescent detector based on the reaction of luminol with NO2 produced by pyrolysis of explosive or other contraband substance and is capable of high throughput, accurate screening in real time of a large number of subjects, e.g. persons being screened in an airport.
Owner:CONTROL SCREENING

A Method for Evaluating the Stability of Slope Rock Mass

InactiveCN102279421AGeological measurementsComplex dynamic systemsDirect effects
For the combined underground and open-pit mining methods, according to the spatial correspondence of the mining area, some of the two mining influence domains overlap each other, resulting in the interaction and superposition of the mining effects, thus forming a composite dynamic system. Therefore, the slope The deformation mechanism of rock mass is more complex. Underground mining has three effects on the overlying rock mass in the area of ​​influence, that is, the change of the overlying rock layer, the reduction of the overall strength and the change of the stress field in the area of ​​influence. The latter is due to underground excavation changing the stress distribution state of the original rock. Within its influence domain, the stress values ​​and behaviors at different spatial locations are different, so the damage to the overlying rock mass by underground excavation is zonal, and this zonal stress change will occur with subsequent excavation different processes of change. This change process will directly affect the stability state of the slope rock mass, that is, the occurrence of this stress restricts or changes the stability state of the slope mass. Therefore, in the stability analysis of slope rock mass, this main influencing factor should be taken into consideration. However, in the past, when dealing with such problems, the analysis method under the influence of single open-pit mining was approximately applied, and the results were somewhat different from the actual situation; the present invention deduces a slope rock mass stability evaluation on the basis of theoretical analysis Methods to provide scientific basis for the follow-up mining design and safety production of such mines.
Owner:NORTH CHINA UNIVERSITY OF TECHNOLOGY

Back cavity-perforated plate-type casing treatment method

The invention discloses a method for treating a back cavity-perforated plate-type casing treatment method. The method comprises the following steps of: designing a casting treater which only comprises an annular back cavity and is provided with a circular hole or an oblique groove perforated hole; and arranging a back cavity-perforated plate-type casing treater at the front end of the rotor inlet of an axial-flow air compressor and covering the back cavity-perforated plate-type casing treater on a position, which corresponds to the front edge part of a rotor blade, of the casing. In the back cavity-perforated plate-type casing treatment method, self-adaptive flow is formed in the back cavity, unsteady shedding vortex is produced on a perforated plate, and the energy of low-frequency disturbance waves in the flow field of the air compressor can be absorbed and dissipated effectively by the interaction of waves and the vortexes and nonlinear amplification of stall inception is suppressed, so that the occurrence of stall inception in the air compressor can be delayed and the stable working range of an air compressor system is expanded; moreover, the mainstream flow field structure of the air compressor is not influenced directly, so that reduction in pressure ratio and efficiency loss of the air compressor system are not caused, a simple and compact structure is achieved and the limiting requirement of engineering on casing size can be met.
Owner:BEIHANG UNIV

Slipproofing agent for surface of ceramic tile and preparation method of slipproofing agent

The invention provides a slipproofing agent for the surface of a ceramic tile and a preparation method of the slipproofing agent. The slipproofing agent is prepared from villiaumite, a corrosion inhibitor, a surfactant, a humectant, essence and the balance of water, wherein the villiaumite is ammonium fluoride and/or ammonium hydrogen fluoride. The preparation method of the slipproofing agent comprises the following steps:, at 25 to 30 DEG C, weighing and taking proper raw materials in sequence, and uniformly agitating the proper raw materials, so as to subsequently obtain the slipproofing agent for the surface of the ceramic tile. According to the slipproofing agent, the villiaumite is used as a main raw material; a product is a neutral aqueous solution; a fluorine ion generates a chemical reaction with a silicate component in the ceramic tile under the action of an ammonium ion in a formula, so as to produce silicon fluoride gas for escaping; the direct effect of the chemical reaction is that numerous nano-sized microporous structures are formed in the surface of the ceramic tile; thus, a slipproofing effect is achieved; nontoxic and harmless raw materials are used by the formula of the slipproofing agent; a neutral solution is convenient to transport and use; further, the slipproofing agent provided by the invention has ultrahigh seepage force.
Owner:GUANGDONG QINGZHU TECH CO LTD

Power system equipment importance assessing and sorting method based on risk analysis

InactiveCN103700025AImprove risk management and control response capabilitiesPracticalForecastingDirect effectsElectric power system
The invention discloses a power system equipment importance assessing and sorting method based on risk analysis. Based on risk assessment of a power system, the importance of power grid equipment for the overall operational risk of the power system under different operating conditions can be shown truly and comprehensively; during assessment of the equipment importance, the commonly-used certainty security standard of power enterprises is also taken into account while comprehensively considering uncertainties of power grid operation, so that the defects that by the conventional importance assessing method, uncertainties of the grid operation cannot be comprehensively considered, the evaluation angle is single, the practicality is not high and the like are effectively overcome, and more comprehensive risk assessment information than that provided by the conventional assessing method can be provided. In the power system equipment importance assessing and sorting method, the equipment importance assessment is carried out by dividing system risk levels, so that both direct influence and indirect influence of the equipment on the safe operation of the power system can be reflected and references can be provided for a local control and optimization scheme of risk management and control of the power system so as to improve responsiveness to the risk management and control of the power system.
Owner:ZHEJIANG UNIV +2
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