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...
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.
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.
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.
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.
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
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.
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...
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
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).
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
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....
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 . 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...
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....
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.
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.
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.
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. ...
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.