Anchor substructure

The substructure should be restrained against up-lift, if necessary, by a suitable dead weight or a hold-down anchor. The weight of the hoist and vehicle, where applicable, may be considered as part or all of the required anchorage. 

It has also been useful to define a seventh feature type in some situations. For example, it may be beneficial to classify separately the groups that can be both hydrogen bond donor and acceptor such as hydroxyl groups or imidazole nitrogens. Alternatively, the seventh feature provides a mechanism to identify an anchor point to substructures of particular interest (see Section 2.2.5). 

If our interest Ues in the acidity of a molecule, similarity search is possible on this net in the following way. Let us employ Qi as a query molecule, and place it on the root-node H2O. The structures of these two molecules are compared after their anchors are matched to each other. H2O has no other atoms other than the anchor oxygen, as we neglect hydrogens in structure expressions. So, H2O is judged to be a substructure of Qi. Then Qi moves down to methanol, which is a substructure of Qi, too. In the next step, Qi goes to both 3 and 4, then to 5, and then to 7. As 6 is not the substructure of Qi, it does not move onto 6. The process repeats until Qi reaches 8. Here, Qi is a superstructure of 8 and it is a substructure of 9. Then, the final location of this query is uniquely determined to be between 8 and 9. In the case of query Q2, a similar procedure sets its final location under 10 and 13. Then we can choose the molecules 8 and 9 as the similar molecules to Qi, while 10 and 13 are selected for Q2. These selections are reasonable, since we are concerned with the acidity of anchor OH components, and since the selected molecules share the biggest common substructure with the query molecule. 

The platform deck is built as an integrated deck structure. This is located on the top of a substructure, consisting of four columns and a rectangular pontoon. The platform is fixed to the seabed by sixteen anchor chains. 

According to the results of the REPA, the anchor-release system of the semi has to be designed such that the platform can withdraw to a safe location outside a burning pool fire on the sea surface in case of blow-out. The risers and substructure have to be protected. The derrick must be able to withstand a burning blow-out during the time it takes to relocate the platform to a safe position outside the pool fire on the sea. With these measures, the semi is considered feasible. 

Rigid 3D searching involves the retrieval of all models (3D entities) in a CIR system that contain a user-defined set of geometric features. The query defines the exact substructural features which are to serve as anchors, the individual geometric... 

---