In practice, due to the double integration of the INS acceleration data, the time-dependent position errors will quickly exceed the accuracy specifications for many trajectory determination applications. Frequent updating is, therefore, needed to achieve the required accuracies. GPS on the other hand, can deliver excellent position accuracy, but has the problem of cycle slips, which are in essence gross errors leading to a discontinuity in the trajectory.
The body of the Bidirectional Algorithm uses bidirectional character types, explicit formatting characters, and bracket pairs to produce a list of resolved levels. This resolution process consists of the following steps: Applying rule P1 to split the text into paragraphs, and for each of these: Applying rules P2 and P3 to determine the paragraph level.
Applying rule X1 which employs rules X2 — X8 to determine explicit embedding levels and directions. Applying rule X9 to remove many control characters from further consideration. Applying rule X10 to split the paragraph into isolating run sequences and for each of these: Applying rules W1 — W7 to resolve weak types.
Applying rules N0 — N2 to resolve neutral types. Applying rules I1 — I2 to resolve implicit embedding levels. Split the text into separate paragraphs. A paragraph Directional process analysis type B is kept with the previous paragraph.
Within each paragraph, apply all the other rules of this algorithm. In each paragraph, find the first character of type L, AL, or R while skipping over any characters between an isolate initiator and its matching PDI or, if it has no matching PDI, the end of the paragraph.
Because paragraph separators delimit text in this algorithm, the character found by this rule will generally be the first strong character after a paragraph separator or at the very beginning of the text. The characters between an isolate initiator and its matching PDI are ignored by this rule because a directional isolate is supposed to have the same effect on the ordering of the surrounding text as a neutral character, and the rule ignores neutral characters.
The characters between an isolate initiator and its matching PDI are ignored by this rule even if the depth limit as defined in rules X5a through X5c below prevents the isolate initiator from raising the embedding level.
This is meant to make the rule easier to implement.
Embedding initiators but not the characters within the embedding are ignored in this rule. If a character is found in P2 and it is of type AL or R, then set the paragraph embedding level to one; otherwise, set it to zero.
Whenever a higher-level protocol specifies the paragraph level, rules P2 and P3 may be overridden: This performs a logical pass over the paragraph, applying rules X2 — X8 to each characters in turn.
The following variables are used during this pass: A directional override status. A directional isolate status. For efficiency, that last entry can be kept in a separate variable instead of on the directional status stack, but it is easier to explain the algorithm without that optimization.Business analysis always focuses upon goals, but in a bi-directional fashion.
Business analysis can be implemented to both set goals, and to achieve them. High torque and drag is one of the main problems in the directional wells. Friction models can be used for analysis during planning, drilling and after finishing the well.
Therefore, there are two actual processes: directional process and informational process. In both cases process analysis explains the process by . Determining the entry and exit points, the depths that must be achieved, and direction changes for the drill path are all major parts of the planning process.
A fleeting "aha" moment is worthless if not retained. Through the visual learning method, users will remember what they learned and carry it forward, opening more doors to new ideas along the way.
A team of researchers from the University of Calgary have developed a new step detection technique that successfully detects steps under varying motion speeds and device, use cases with an average performance of %, and outperforms some of the state of the art techniques that rely on classifiers and commercial wristband products.