Positioning accuracy

Xem 1-20 trên 36 kết quả Positioning accuracy
  • Tuyển tập các báo cáo nghiên cứu về y học được đăng trên tạp chí y học Radiation Oncology cung cấp cho các bạn kiến thức về ngành y đề tài: In vivo assessment of catheter positioning accuracy and prolonged irradiation time on liver tolerance dose after single-fraction 192 Ir high-dose-rate brachytherapy...

    pdf10p toshiba10 15-10-2011 18 1   Download

  • A problem frequently encountered in the automatic parsing of Russian texts is the correct structuring of prepositional phrases in sentences. Studies of text samples indicate that, when other criteria are absent, the syntactic governors of prepositions can be determined with a high degree of accuracy by reference to the relative position and part-ofspeech of elements in the clausal environment.

    pdf0p nghetay_1 06-04-2013 24 2   Download

  • The paper presents the Position Specific Posterior Lattice, a novel representation of automatic speech recognition lattices that naturally lends itself to efficient indexing of position information and subsequent relevance ranking of spoken documents using proximity. In experiments performed on a collection of lecture recordings — MIT iCampus data — the spoken document ranking accuracy was improved by 20% relative over the commonly used baseline of indexing the 1-best output from an automatic speech recognizer. The Mean Average Precision (MAP) increased from 0.

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  • Keywords: Screw Drive, Dynamic Model, Vibration Modes, Ritz Series. Abstract. The ball screw drives are among the most commonly mechanisms used to provide motion in high speed machine tools. The most important factor that affects high speed positioning accuracy is the closed loop bandwidth, which in turn is affected by the structural vibration modes.

    pdf13p nvavan 12-01-2010 128 30   Download

  • Skill-Assist is a kind of power assist devices which has been introduced to labor-intensive final assembly lines in automotive industry for helping workers mount such heavy modular parts as instrumental panels on vehicles with high positioning accuracy. The paper briefly describes a current technology which has been already implemented on the controller of the Skill-Assist for putting it to practical use, and a future safeguarding method that has been developed on a laboratory basis.

    pdf0p beobobeo 01-08-2012 33 6   Download

  • Although the number of new infections among children has decreased sharply over the past several years (as noted previously in this report), greater efforts are needed to ensure that progress continues. Most cases of HIV infection among infants and children stem from insufficient information and counselling provision among women in regards to HIV/AIDS and sexual and reproductive rights and the lack of adequate antenatal care during pregnancy. Respondents consider all new cases to be inexcusable given the broad prevention mechanisms currently available.

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  • One strength of the sample is that the microfinance institutions have been selected based in large part on their ability to deliver quality data. A disadvantage is that participation in the database is voluntary. (Grameen Bank, for example, chose not to participate during our sample period.) The data set is thus not representative of all microfinance institutions, and the sample is skewed toward institutions that have stressed financial objectives and profitability.

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  • PERCENT REGULATION There are a number of ways to define performance, such as servo bandwidth, accuracy, regulation, etc. Percent regulation, for machine servo drives, can be defined as how much the controlled variable of a servo will reduce as load is applied to the servo. As such, percent regulation is usually applied to type 0 velocity regulators to describe how well the output velocity will be maintained as load is applied to the output of the drive. Percent regulation is often given as the equation Percent regulation ¼ no load speed À full load speed full load speed...

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  • Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí sinh học thế giới đề tài: A simulation study on the accuracy of position and effect estimates of linked QTL and their asymptotic standard deviations using multiple interval mapping in an F2 scheme

    pdf25p toshiba19 08-11-2011 30 3   Download

  • Tuyển tập các báo cáo nghiên cứu về hóa học được đăng trên tạp chí sinh học quốc tế đề tài : Accuracy of acetabular cup positioning using imageless navigation

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  • A within-subjects analysis was used to reduce any variability that may have been attributed to differences between subjects: thus, each subject’s performance on one layout was compared with his or her own performance on an alternative layout. The practice diagrams and the randomisation of the order of presentation of the experimental diagrams for each subject helped counter the learning effect (whereby subjects’ performance on the task may improve over time, as they become more competent in the task).

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  • That sticky wages and inflation targeting are uneasy bedfellows is easy to see. When wages are sticky, an inflation targeting central bank in effect targets the real wage. This produces inefficient outcomes when shocks occur which require an adjust- ment to the real wage (Erceg, Henderson and Levin (2000).) For example, suppose a shock - a positive oil price shock, say - occurs which reduces the value marginal product of labor. Preventing a large fall in employment under these circumstances wouldrequireadropintherealwage.

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  • Robotics has achieved its greatest success to date in the world of industrial manufacturing. Robot arms, or manipulators, comprise a 2 billion dollar industry. Bolted at its shoulder to a specific position in the assembly line, the robot arm can move with great speed and accuracy to perform repetitive tasks such as spot welding and painting (figure 1.1). In the electronics industry, manipulators place surface-mounted components with superhuman precision, making the portable telephone and laptop computer possible....

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  • Sensors used for ultra-precision machines include position and velocity sensors, which are mostly part of a control loop, and for some special applications acceleration sensors for active vibration control, and thermal sensors for thermal error compensation [1]. An essential component of each positional feedback loop in a machine tool is the displacement measurement system for detecting the actual position of moving machine parts. It is the performance of such measurement systems that limits the accuracy of machine tools and hence directly affects the quality of the machined part...

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  • The control user should be familiar with servos. The user will understand what a servo is and why it is required in so many applications. This discussion will answer these two basic questions: What is a servo? Why use a servo? Any discussion of servos will have to employ the term ‘‘feedback.’’ Thousands of times every day we require information to be ‘‘fed back’’ to us so that we can perform normal activities. When controlling a car down a highway, feedback is provided to our brain by the gift of sight....

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  • Machining system by moving the workpiece back to the machining position and performing additional machining. In other words, the dimensional error of machining can be corrected before demounting the workpiece from the machine. Concerning the VS method, applications for the measurement of practical parts and improvements in reproducibility and accuracy are currently being investigated.

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  • With one of the largest domain-reputation databases in the world, the Trend Micro Web Reputation technology tracks the credibility of Web domains by assigning a reputation score based on factors such as a website's age, historical location changes and indications of suspicious activities discovered through malware behavior analysis. It will then continue to scan sites and block users from accessing infected ones.

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  • The accuracy of a machined part depends on the precision motion delivered by a machine tool under static, dynamic, and thermal loads. The accuracy is evaluated by measuring the discrepancy between the desired part dimensions identified on a part drawing and the actual part achieved after machining operations.

    pdf13p phuphong 10-12-2009 56 5   Download

  • This paper presents a detailed study of the integration of knowledge from both dependency parses and hierarchical word ontologies into a maximum-entropy-based tagging model that simultaneously labels words with both syntax and semantics. Our findings show that information from both these sources can lead to strong improvements in overall system accuracy: dependency knowledge improved performance over all classes of word, and knowledge of the position of a word in an ontological hierarchy increased accuracy for words not seen in the training data. ...

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  • To understand conceptually how Bayes' theorem estimates the posttest probability of disease, it is useful to examine a nomogram version of Bayes' theorem (Fig. 3-2). In this nomogram, the accuracy of the diagnostic test in question is summarized by the likelihood ratio , which is defined as the ratio of the probability of a given test result (e.g., "positive" or "negative") in a patient with disease to the probability of that result in a patient without disease.

    pdf5p tubreakdance 26-11-2010 27 4   Download

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