Batching is a well-known cause of the bullwhip effect. Despite being very common in many industries to leverage economies scale, it has been little explored due its nonlinear complexity. This work examines how order-quantity batching affects performance closed-loop supply chains, which are gaining importance as result their environmental and economic value. Specifically, we analyse hybrid syste...

In this work we develop a new algorithm for regularized empirical risk minimization. Our method extends recent techniques of Shalev-Shwartz [02/2015], which enable a dual-free analysis of SDCA, to arbitrary mini-batching schemes. Moreover, our method is able to better utilize the information in the data defining the ERM problem. For convex loss functions, our complexity results match those of Q...

Parallel video servers provide highly scalable video-on-demand service for a huge number of clients. The conventional streamscheduling scheme does not use I/O and network bandwidth efficiently. Some other schemes, such as batching and streammerging, can effectively improve server I/O and network bandwidth efficiency. However, the batching scheme results in long startup latency and high reneging...

The key performance bottleneck for large-scale video-on-demand (VoD) systems is the server bandwidth, which controls the number of clients a video server can support. Two existing stream scheduling schemes can save server bandwidth significantly by using multicast method to transmit video data: the batching scheme and the patching scheme. However, the batching scheme results in long start-up la...

Different retail and e-commerce companies are facing the challenge of assembling large numbers time-critical picking orders that include both small-line multi-line orders. To reduce unproductive picker working time as in traditional picker-to-parts warehousing systems, different solutions proposed literature practice. For example, a mixed-shelves storage policy, items same stock keeping unit sp...

In the face of diversity and complexity online orders, supermarkets need to improve their sorting efficiency meet increasing customer demands. Order batching parallel picking are two key measures order picking, which have been widely applied in practice. involves combining multiple orders into one batch for inspection, packaging. Parallel items simultaneously areas. This research investigates c...

The ‘‘bullwhip’’ effect is a major cause of supply chain deficiencies. This phenomenon refers to grow the amplification of demand or inventory variability as it moves up the supply chain. Supply chain managers experience this variance amplification in both inventory levels and orders. Other side, dampening variance in orders may have a negative impact on customer service due to the increase in ...

We examine the reduction in efficiency in a system where each processor has a sequence of tasks and must synchronize with other processors after each task is done. This occurs, for example, in many stepwise simulations. In OpenMP, the only explicit synchronization is the barrier, which causes all processors to wait for the slowest one. This is problematic when the tasks take variable amounts of...

In many applications, it is desirable to work with signatures that are short, and yet wheremanymessages from different signers be verified very quickly. RSA signatures satisfy the latter condition, but are generally thousands of bits in length. Recent developments in pairing-based cryptography produced a number of “short” signatures which provide equivalent security in a fraction of the space. ...