This paper attempts to solve a basic problem in distributed statistical inference: how many machines can we use in parallel computing? In kernel ridge regression, we address this question in two important settings: nonparametric estimation and hypothesis testing. Specifically, we find a range for the number of machines under which optimal estimation/testing is achievable. The employed empirical...

A new device of inserting an absorbing plate to divide a flat-plate channel into two channels with fins attached and external recycling at the ends, resulting in substantially improving the heat transfer efficiency, has been investigated both experimentally and theoretically. The agreement of the theoretical predictions with those measured values from the experimental results is fairly good. Th...

Sound synthesis methods aim at the auralization of the sound produced by a physical sound source as it is heard by a listener at an arbitrary location. In order to suit the synthesis approach, the physical source is represented by an acoustic equivalent source model which behaves similar in the far field. However, it is not straightforward to determine the number, the position, the type, . . . ...

Polarization control of electromagnetic wave is very important in many fields. Here, we propose an active meta-mirror to dynamically manipulate electromagnetic polarization state at a broad band. This meta-mirror is composed of a double-layered metallic pattern backed by a metallic flat plate, and the active elements of PIN diodes are integrated into the meta-atom to control the reflection phas...

OBJECT The authors present a series of 16 patients who underwent inside-outside occipital and posterior cervical spine stabilization. METHODS In this technique, the screw was placed from the inside of the occiput to the outside. An articular (lateral) mass plate was contoured to the shape of the occipital bone and the cervical spine and affixed to the occiput with a flat-headed screw or stud ...

results the main isolated fungal spores from the atmosphere of tabriz district were penicillium sp. (36.6%), cladosporidium sp. (26.8%) and aspergillus sp. (23.6%). conclusions the presence of fungal spores in the atmosphere as a part of air pollution can cause significant problems for human health, particularly in the respiratory tracts. background air contamination with fungal spores and the ...

Classical discharge theory (Townsend and streamer theory) has limitations in explaining nanosecond pulsed gas discharge. In recent years, the research on based high-energy runaway electrons attracted extensive attention. But so far, there have been few studies of generation mechanism atmospheric-pressure-air plate-to-plate discharge, which seriously hinders application development pulse plasma....

abstract: there is always a need to increase a distillate output of solar still. if plates will be used inside solar still then distillate output of solar still are expected to increase. hence, an experimental study is conducted to improve distillate output of basin solar stills by increasing the effective surface area with the help of different plates. for the purpose of experiment, three sola...

The objective of this study was to provide experimental data that could be used to predict frost growth and frost performance of a round plate fin-tube heat exchanger for low temperature heat pumps used in zero emission vehicles under cold weather conditions. In this study, round plate fin-tube heat exchangers were tested with variation of the fin space, air flow rate, relative humidity, and in...

This paper investigates the design optimization of an electrostatically actuated microcantilever resonator that operates in air. The nonlinear effects of electrostatic actuation and air damping make the structural dynamics modeling more complex. There is a need for an efficient way to simulate the system behavior so that the design can be more readily optimized. This paper describes an efficien...