Selecting samples

Xem 1-20 trên 122 kết quả Selecting samples
  • Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí hóa học quốc tế đề tài : The health-related quality of life in rheumatoid arthritis, ankylosing spondylitis, and psoriatic arthritis: a comparison with a selected sample of healthy people

    pdf12p panasonic07 04-01-2012 27 4   Download

  • Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí sinh học thế giới đề tài: Mapping QTL in outbred populations using selected samples

    pdf0p toshiba19 15-11-2011 16 1   Download

  • While the average performance of statistical parsers gradually improves, they still attach to many sentences annotations of rather low quality. The number of such sentences grows when the training and test data are taken from different domains, which is the case for major web applications such as information retrieval and question answering. In this paper we present a Sample Ensemble Parse Assessment (SEPA) algorithm for detecting parse quality.

    pdf8p hongvang_1 16-04-2013 22 2   Download

  • With a few exceptions, discriminative training in statistical machine translation (SMT) has been content with tuning weights for large feature sets on small development data. Evidence from machine learning indicates that increasing the training sample size results in better prediction. The goal of this paper is to show that this common wisdom can also be brought to bear upon SMT.

    pdf11p nghetay_1 07-04-2013 15 1   Download

  • This paper introduces a new method for identifying named-entity (NE) transliterations within bilingual corpora. Current state-of-theart approaches usually require annotated data and relevant linguistic knowledge which may not be available for all languages. We show how to effectively train an accurate transliteration classifier using very little data, obtained automatically. To perform this task, we introduce a new active sampling paradigm for guiding and adapting the sample selection process.

    pdf4p hongphan_1 15-04-2013 12 1   Download

  • This paper discusses sampling strategies for building a dependency-analyzed corpus and analyzes them with different kinds of corpora. We used the Kyoto Text Corpus, a dependency-analyzed corpus of newspaper articles, and prepared the IPAL corpus, a dependency-analyzed corpus of example sentences in dictionaries, as a new and different kind of corpus. The experimental results revealed that the length of the test set controlled the accuracy and that the longest-first strategy was good for an expanding corpus, but this was not the case when constructing a corpus from scratch. ...

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  • For the first time, the detection of DNA sequences, related to HIV (found in AIDS patients), using Methylene Blue (MB) as the redox indicator was performed. The voltametric signals have been investigated on bared chitosan (CS) modified; probe immobilized (DNA single strand) and target-hybridized (DNA double strand) electrodes sequentially by means of Cyclic Voltammetry (CV) and Square Wave Voltammetry (SWV). The response of hybridization between the probe and perfectly complementary, double-base mismatch, single-base mismatch of analyzed targets were clearly identified.

    pdf5p uocvong03 24-09-2015 7 2   Download

  • Lecture "Advanced Econometrics (Part II) - Chapter 5: Limited dependent variable models - Truncation, censoring (tobit) and sample selection" presentation of content: Truncation, censored data, some issues in specification, sample selection model, regression analysis of treatment effects.

    pdf13p nghe123 06-05-2016 15 4   Download

  • Chapter 8 provides knowledge of sampling methods and central limit theorem. When you have completed this chapter, you will be able to: Explain under what conditions sampling is the proper way to learn something about a population, describe methods for selecting a sample, define and construct a sampling distribution of the sample mean,...

    ppt47p tangtuy09 21-04-2016 12 1   Download

  • Instructions: Check each test method for which you are requesting accreditation. NVLAP Code ADMIXTURES _____ 02/A35 _____ 02/A36 ASTM C233 ASTM C311 Testing Air-Entraining Admixtures for Concrete Sampling and Testing Fly Ash or Natural Pozzolans for Use as a Mineral Admixture in Portland Cement Concrete Effectiveness of Mineral Admixtures in Preventing Excessive Expansion of Concrete Due to the AlkaliAggregate Reactions Test Method Designation.

    pdf10p kien098 03-02-2011 133 35   Download

  • Statistical procedures of estimation and inference are most frequently justified in econometric work on the basis of certain desirable asymptotic properties. One estimation procedure may, for example, be selected over another because it is known to provide consistent and asymptotically efficient parameter estimates under certain stochastic environments.

    pdf68p phuonghoangnho 23-04-2010 184 22   Download

  • This paper is the result collaborative work between international and riparian biologists and ecologists over a number of years. The principal contributing authors are: Yuwadee Peerapornpisal, Tatporn Kunpradid, Sutthawan Suphan, (benthic diatoms); Chanda Vongsambath, Niane Sivongxay (littoral macroinvertebrates); Pham Anh Duc (benthic macroinvertebrates); Nguyen Thi Mai Linh (zooplankton); Supatra Parnrong Davidson, Sok Khom, and Monyrak Meng (environmental variables).

    pdf100p nguyenngocsonctu 01-12-2010 104 19   Download

  • The determination of pesticides in food and environmental samples at low concentrations is always a challenge. Ideally, the analyte to be determined would be already in solution and at a concentration level high enough to be detected and quantified by the selected final determination technique (i.e., HPLC or GC). Unfortunately, the reality is far from this ideal situation.

    pdf24p gaucon_ngoan 26-12-2011 37 9   Download

  • THE EFFECTS OF CUSTOMER LOYALITY ON PROFITABILLITY Chapter Three turns to a wholly different, but not unrelated, topic, the role of admissions exam scores in the identification of well-prepared students in the college admissions process. The case for using such exams is often made with “validity” studies, which estimate the correlation between test scores and eventual collegiate grades, both with and without controls for high school grade point average. I argue that there are two fundamental problems with these studies as they are often carried out.

    pdf164p mualan_mualan 25-02-2013 30 8   Download

  • Statistics has evolved into a very important discipline that is applied in many fields. In the modern age of computing, both statistical methodology and its applications are expanding greatly. Among the many areas of application, we (Friis and Chernick) have direct experience in the use of statistical methods to military problems, space surveillance, experimental design, data validation, forecasting workloads, predicting the cost and duration of insurance claims, quality assurance, the design and analysis of clinical trials, and epidemiologic studies....

    pdf419p thuytienvang_1 31-10-2012 21 4   Download

  • Serous or “body cavity fluids” are usually collected with aseptic technique by needle puncture and aspiration of the body cavity fluid. Methods for obtaining the specimen vary depending upon the site. Fluids are best collected into a dry container and submitted in the fresh state to the laboratory. 7 Adding 3-5 IU heparin/mL to a container prior to obtaining a bloody sample will usually inhibit clotting and not adversely affect morphology. If delay in transportation to the laboratory is unavoidable, most fluids may be kept refrigerated (4ºC) up to 72 hours.

    pdf90p le_minh_nha 18-12-2012 28 4   Download

  • Tuyển tập các báo cáo nghiên cứu về y học được đăng trên tạp chí y học Critical Care cung cấp cho các bạn kiến thức về ngành y đề tài: Severe sepsis epidemiology: sampling, selection, and society...

    pdf5p thulanh17 23-10-2011 23 4   Download

  • The sample from a population applet lets the user select samples of various sizes from a wide range of population shapes including uniform, bell-shaped, skewed, and binary populations (including a range of values for the population proportion, p ). In addition, one can alter any of the default populations to create a custom distribution by dragging the mouse over the population or by going to Custom binary and typing in the desired population proportion. Small samples are drawn in an animated fashion to help students understand the basic idea of sampling.

    pdf834p taurus23 27-09-2012 42 3   Download

  • As a consequence of the increasing importance of tritium resulting from nuclear fission and neutron activation, from its use in accelerators, from its use in research and industry, and from its use in the investigation of the environment and its distribution in the environment, the NCRP designated a scientific committee to prepare a report on the currently acceptable methods of measuring tritium. This report is particularly aimed in assisting an individual to select a procedure suitable to the problem at hand....

    pdf109p camchuong_1 04-12-2012 18 3   Download

  • Analysis of streambed sediments in the Salem, Oregon, area showed anomalously large concentrations of some elements and organic chemicals, indicating contamination from anthropogenic and/or geologic sources. The streambed sediment sample from Clark Creek, an urban basin, had large concentrations of polycyclic aromatic hyrdocarbons (PAHs), organochlorines, cadmium, lead, and zinc. The sample from the East Fork of Pringle Creek, which is a mostly urban basin, had the highest concentrations of DDD, DDE, and DDT compounds.

    pdf50p ut_hai_can 29-12-2012 14 3   Download

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