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  2. Globally Harmonized System of Classification and Labelling of ...

    en.wikipedia.org/wiki/Globally_Harmonized_System...

    The pictogram for harmful substances of the Globally Harmonized System of Classification and Labelling of Chemicals.. The Globally Harmonized System of Classification and Labelling of Chemicals (GHS) is an internationally agreed-upon standard managed by the United Nations that was set up to replace the assortment of hazardous material classification and labelling schemes previously used around ...

  3. Dangerous goods - Wikipedia

    en.wikipedia.org/wiki/Dangerous_goods

    Packing Group I, if they have an initial boiling point of 35°C or less at an absolute pressure of 101.3 kPa and any flash point, such as diethyl ether or carbon disulfide; Packing Group II, if they have an initial boiling point greater than 35°C at an absolute pressure of 101.3 kPa and a flash point less than 23°C, such as gasoline (petrol ...

  4. List of small groups - Wikipedia

    en.wikipedia.org/wiki/List_of_small_groups

    List of all nonabelian groups up to order 31 Order Id. [a] G o i Group Non-trivial proper subgroups [1] Cycle graph Properties 6 7 G 6 1: D 6 = S 3 = Z 3 ⋊ Z 2: Z 3, Z 2 (3) : Dihedral group, Dih 3, the smallest non-abelian group, symmetric group, smallest Frobenius group.

  5. Group (periodic table) - Wikipedia

    en.wikipedia.org/wiki/Group_(periodic_table)

    In the periodic table of the elements, each column is a group. In chemistry, a group (also known as a family) [1] is a column of elements in the periodic table of the chemical elements. There are 18 numbered groups in the periodic table; the 14 f-block columns, between groups 2 and 3, are not numbered.

  6. Multi-label classification - Wikipedia

    en.wikipedia.org/wiki/Multi-label_classification

    In the multi-label problem the labels are nonexclusive and there is no constraint on how many of the classes the instance can be assigned to. Formally, multi-label classification is the problem of finding a model that maps inputs x to binary vectors y; that is, it assigns a value of 0 or 1 for each element (label) in y.

  7. Cayley table - Wikipedia

    en.wikipedia.org/wiki/Cayley_table

    The Cayley table tells us whether a group is abelian. Because the group operation of an abelian group is commutative, a group is abelian if and only if its Cayley table's values are symmetric along its diagonal axis. The group {1, −1} above and the cyclic group of order 3 under ordinary multiplication are both examples of abelian groups, and ...

  8. Label propagation algorithm - Wikipedia

    en.wikipedia.org/wiki/Label_propagation_algorithm

    When many such dense (consensus) groups are created throughout the network, they continue to expand outwards until it is impossible to do so. [2] The process has 5 steps: [2] 1. Initialize the labels at all nodes in the network. For a given node x, C x (0) = x. 2. Set t = 1. 3. Arrange the nodes in the network in a random order and set it to X. 4.

  9. Size of groups, organizations, and communities - Wikipedia

    en.wikipedia.org/wiki/Size_of_groups...

    Groups with three members (triads, trios, troikas, etc.) are hard to maintain. After all, it is easier to deal with one other person than with two. Besides, two of the people in a triad are apt to find it easier to relate to each other than to the other partner. That can motivate the neglected party to drop out of the group. [3]