The merits of the novel approaches to catching change-points in TV-AR processes are assessed via numerical simulations using synthetic and real data.
The group Lasso is advocated here for catching change points by estimating the difference vectors as { d ^ n } n = 0 N = arg min { d n } n = 0 N 1 2 y - Xd 2 2 + λ ∑ n = 1 N d n 2 1 (12).
Motivated by this scalar example, we propose as an alternative to (12), the following group SCAD approach for catching change-points: { d ^ n } n = 0 N = arg min { d n } n = 0 N 1 2 y - Xd 2 2 + ∑ n = 1 N p λ SCAD ( d n 2 ).
Despite the fact that block-coordinate descent is typically adopted for large-size sparse linear regression, what makes it particularly appealing for catching change-points is the fact that the vector g n ( i ) can be updated recursively in n due to the special structure of R in (16).
Clark is minister for business, energy and – in one of the most eye-catching changes resulting from the arrival of Theresa May – industrial strategy.
If the Tesco Extra Colney Hatch store in north London is anything to go by, Dave Lewis has already made some eye-catching changes in his efforts to turn around the UK's biggest supermarket chain.
These are not small matters.All the same, if there are substantial and eye-catching changes to the convention text, or if (as seems quite likely) the inter-governmental conference simply fails to reach agreement on time next month, there will be much hand-wringing in Brussels, Paris and Berlin.
PW The most eye-catching change from last season will be the presence of the £11.4m signing from Atlético Madrid, Toby Alderweireld, in central defence.
But the extent of the dilution has taken most by surprise.The most eye-catching change is that the test in the bill for withholding information from the public will, in many circumstances, be whether disclosure might "prejudice" the operation of government.
The most eye-catching change comes in the County Championship with the introduction of a round of nine day-night fixtures that will start from 26 June with England's cricketers free to play as they prepare for their first floodlit Test at home against West Indies at Edgbaston starting on 17 August.
The most noticeable and eye-catching change to your Facebook profile, however, is not the Timeline navigation – it's the large banner-sized photo that's displayed at the top of the page where, as of today, a series of smaller profile pictures appear.
