We present a search for extragalactic fast blue optical transients (FBOTs) during Phase I of the Zwicky Transient Facility (ZTF). identify 38 candidates with durations above half-maximum light 1 d < t1/2 12 d, which 28 have (g-r<-0.2 mag) colors at peak light. Of (28 FBOTs), 19 (13) can be spectroscopically classified as core-collapse supernovae (SNe): 11 (8) H- or He-rich (Type II/IIb/Ib) SNe,...

In dynamic service-oriented environment, service monitoring could provide reliability improvement to service composition as well as cost increase. To reduce the overall cost brought by monitoring, existing literatures proposed to decrease the number of monitors through monitoring the most reliability-sensitive services. However, the optimal monitoring rate for those monitors was not taken into ...

Abstract We search for H α emitters at z ∼ 7.8 in four gravitationally lensed fields observed the Hubble Frontier Fields program. use Lyman break method to select galaxies target redshift and perform photometry Spitzer/IRAC 5.8 μ m band detect emission from candidate galaxies. find no significant detections of counterparts IRAC band, this gives a constraint on luminosity function (LF) 7.8. comp...

Minimum error rate training is often the preferred method for optimizing parameters of statistical machine translation systems. MERT minimizes error rate by using a surrogate representation of the search space, such as N best lists or hypergraphs, which only offer an incomplete view of the search space. In our work, we instead minimize error rate directly by integrating the decoder into the min...