how skewness can make your execution times variable

... Environment��������������������������������������������������������17 ■■ Chapter 3: How Object Statistics Can Make Your Execution Plan Wrong������������������������39 ■■ Chapter 4: How Skewness Can Make Your Execution Times Variable �����������������������������53 ... example below (Figure 3-3) you can see an index with stale statistics 42 Chapter ■ How Object Statistics Can Make Your Execution Plan Wrong Figure 3-3.  An index row is shown with “Stale Stats” as ... You can also lock statistics from a convenient time Figure 3-7.  If your table statistics are very volatile, you may be better off locking them 46 Chapter ■ How Object Statistics Can Make Your Execution...

Ngày tải lên: 17/03/2014, 19:20

... instructions guide you through development of your first model The intent is to demonstrate the fundamentals and to show how quickly and easily a model can be created using this program This tutorial ... Delete command, or Press the Delete key on your keyboard F Make sure that the plan view is active and click the XZ View button Your model now appears as shown in Figure 15 Figure 15 Model after ... Edit menu commands Draw Frame Objects Make sure that the X-Y Plane @ Z=0 view (plan at lowest elevation) is active (see Step1-D for directions on how to make a view active and page 2-14 for setting...

Ngày tải lên: 06/09/2012, 15:56

... then cooled down to approximately 45 °C, re-scanned to approximately 225 °C, cooled down again, and subsequently scanned to 240 °C The results are shown in Figure The solid–solid phase transition ... second scan may have contributed to the small shift in the onset temperature The endotherm was not observed during the third scan, because the sample melted at 210 °C during the second scan In ... In fact, Form I can be 852 • Vol 11, No 5, 2007 / Organic Process Research & Development converted to Form III by refluxing a slurry in 95/5 acetone/ water Form III, however, cannot be converted...

Ngày tải lên: 14/02/2014, 03:20

... can have repercussions on contemporary technology Penny (1999) penetrates the differences between artist and scientists with respect to how they employ the technology of their times, showing how ... on the canvas will change its state, and make the canvas provide the artist with new input that then will provoke another action in the artist, who will again change the state of the canvas, ... a process can take, but also how distinct trajectories relate to different contextual properties For instance, the properties in the local context that affect emotions and evaluations can acquire...

Ngày tải lên: 19/02/2014, 17:20

... “densest” areas We show that this principle is also beneficial for the text-database world We also show how we can The query interface is available at http://www.cancer.gov/search/cancer_literature/ ... summary for CancerBACUP, which is in the same category as CANCERLIT, to allow CANCERLIT to be selected when the “Cancer” category is selected (the ActualDFest (metastasis) frequency from CancerBACUP ... database CANCERLIT1 When we issue the query [lung AND cancer], CANCERLIT returns 68,430 matches These matches correspond to high-quality citations to medical articles, stored locally at the CANCERLIT...

Ngày tải lên: 23/03/2014, 16:21

... concentration values The specific time-averaged concentration data can then be obtained from continuous records Time-averaged data can also be obtained by sampling for a short time – i.e by sampling ... be away from the sources of pollution It can also be done by gridding the entire area to get statistically recommended values The number of locations however depends upon the variability of concentration ... the end of the sampling It is preferable to observe sampling period consistent with the averaging times for which air quality standards of the given pollutants are specified Network design of monitoring:...

Ngày tải lên: 29/03/2014, 14:20

... and RAM size) Your name, your company’s name, and how we may contact you Phone Support Priority phone support is available to those with a current SUM subscription from CSI or your dealer For ... model, which shows the model at the element level, may be viewed at any time The analysis model shows how the program has automatically meshed the structure Results are always shown on the analysis ... specify how the load cases are to be applied (e.g., statically, dynamically, and so on) and how the structure is to be analyzed (e.g., linearly, nonlinearly, and so on) The same load case can be...

Ngày tải lên: 01/04/2014, 03:20

... between the process subunits can become obvious Further, the process reaction to disturbances (such as feed variation, instruments failure or change of operation strategy) can be fully investigated ... Distributed Control Systems (DCS) can be used to capture, maintain and develop existing operating skills Among others, a fully deployed operator training system can be used to: Offer plant operators ... conditions should be avoided, since the effects of moving from one operational region to another can be unanticipated and possibly dangerous Thus, one need to be aware of the danger zones and when...

Ngày tải lên: 01/04/2014, 10:51

Ngày tải lên: 03/05/2014, 16:07

... (six shown) of ISPI patterns and a number of islands (four shown) The bowtie apertures were milled on top of the island using focused ion beam milling [Fig 2(d)] The use of the islands can reduce ... piezoelectric stage moves, Fig 5(c) shows variation of the gap distance is about 40 nm over a scanning distance of 100 lm without the feedback control, which can be caused by a small tip–tilt angle ... light incident geometry so that it can be integrated with the lithography system without interfering with the lithography process In theory, the ISPI gratings can be designed for an arbitrarily...

Ngày tải lên: 06/05/2014, 08:53

... (word) yifu clothes ∗ wo zuo ta I make him (‘I make things for him.’) wo gen ta zuo I with him make ‘I make clothes with him.’ yifu clothes ∗ wo zuo ta I make him (‘I make things with him.’) wo xiang ... 5, and However, before these analyses can be presented, I propose in Chapter how BPS and the Linear Correspondence Axiom (LCA) can be made compatible with each other In doing so, I will show that ... instances of NI shown so far Note that the bare noun cannot be considered morphologically incorporated because it can be separated from the verb by aspectual morphology and can even be focused...

Ngày tải lên: 30/05/2014, 22:57

... been provided to help the reader understand how the technique works and under what conditions it can be used most effectively Guidance is provided on how to use the Environmental Protection Agency ... environmental agency regulations can be obtained Chapter provides the reader with the fundamentals of radioactivity, radiation, and radiation detection Chapter provides guidance on how to develop a defensible ... efforts have been made to publish reliable data and information, but the author and the publisher cannot assume responsibility for the validity of all materials or for the consequences of their...

Ngày tải lên: 18/06/2014, 19:20

... significant impacts on the environment, a FONSI is published An EA can facilitate preparation of an EIS when one is needed, but is not necessary if it is already known that there will be significant ... objective of the EIS is to provide a full and fair discussion of significant environmental impacts, and is used to inform decision makers and the public of the reasonable alternatives, which would ... testing is completed If the testing data indicate that the substance may present a significant risk of cancer, gene mutations, or birth defects, the EPA will promulgate regulations concerning...

Ngày tải lên: 18/06/2014, 19:20

... (carbon-14) will emit a beta particle leaving a stable nitrogen atom There are, however, three decay series found in nature that make up the radionuclides at most radioactively contaminated sites: the ... energetic electron, but unlike electrons, beta particles can have a +1 or a –1 charge Beta particles are emitted from the nucleus of an atom and can have energies in the million-electronvolt range ... directions many times until it loses all its energy through a series of collisions The range of a beta particle is energy dependent and it may travel several feet in air Beta particles can penetrate...

Ngày tải lên: 18/06/2014, 19:20

... distribution is known, a parametric test can make use of that additional information However, if the sampling distribution is different from that assumed, the results can be unpredictable A primary advantage ... to determine whether or not the site can be subdivided into strata As mentioned above, distributions provide a good illustration of how tightly clustered or how widely spread out the measured concentrations ... distribution provides a sense of how tightly clustered or how widely spread out the measured concentrations are This feature of a distribution is called variability, and can be summarized by calculating...

Ngày tải lên: 18/06/2014, 19:20

... when and how it occurred, and how it is being addressed; • Detailed description of any accidents that occurred, noting who received the injury, how it occurred, how serious the injury was, how the ... when, how, and where equipment was decontaminated, and what was done with the wastewater; Description of any mechanical problems that occurred at the site, noting when and how it occurred, and how ... description of any accidents that occur, noting who received the injury, how it occurred, how serious the injury was, how the person was treated, and who was notified It is essential that field...

Ngày tải lên: 18/06/2014, 19:20

... combinations of data review, verification, and validation can be imposed on the project data depending on the intended use of the information However, the end result of the verification/validation ... of verification and the applicability to objectives such as risk assessment would be questionable However, for site characterization studies and definition of contamination nature and extent for ... specified in the DQOs and Sampling and Analysis Plan Tier II validation does require more effort; however, this level enables meaningful qualification of the data and is considered acceptable for...

Ngày tải lên: 18/06/2014, 19:20

... decision-making purposes Consequently, the data management plan should describe how data will be made accessible to decision makers Decision makers tend to have very individualistic software demands based on ... adjusted to make them more directly comparable to gamma spectroscopy results Timely and efficient decision making presumes that sampling and survey results are quickly available to decision makers ... packages that can be applied to radiological data Since most environmental data are spatial (i.e., have coordinates associated with them), Geographical Information Systems (GIS) can be used Examples...

Ngày tải lên: 18/06/2014, 19:20

... Reviewed field and laboratory quality assurance requirements Maps Showing Actual Sampling Locations Reviewed project-specific maps showing actual sampling locations, and compare against the requirements ... contaminated until shown to be clean), or (b) fail to reject the null hypothesis In case (a), the data have provided the evidence needed to reject the null hypothesis, so the decision can be made that ... statistical hypothesis test for drawing conclusions from the data set All statistical hypothesis tests make assumptions about the data set Parametric tests (e.g., one sample t-test) assume that the data...

Ngày tải lên: 18/06/2014, 19:20

... covered Scan the surfaces of the equipment for gross alpha and gross beta/gamma activity to determine if equipment meets radiological release limits Collect swipe samples from the areas showing ... air dry Scan the surfaces of the equipment for gross alpha and gross beta/gamma activity to determine if equipment meets radiological release limits Collect swipe samples from the areas showing ... air dry Scan the surfaces of the equipment for gross alpha and gross beta/gamma activity to determine if equipment meets radiological release limits Collect swipe samples from the areas showing...

Ngày tải lên: 18/06/2014, 19:20