an air filter is a significant element of any mechanical ventilation system. however, the importance and performance evaluation of air filters have not been well publicized and related scientific reports are scarce. in this study, a transportable, off-line, air filter-testing unit (the unit) was designed and utilized to simulate the filter housing of a mechanical ventilation system. the unit wa...

ion abstraction parallelisation translation translation translation system transformation user transformation third party transformation A L application in language L HL harness in language L Figure 1. intermediate ML development ML software to C++ (this stage has not yet been automated, though previous work shows it is possible [5]), and this is done at the end of the development cycle. Transl...

Many engineering applications require extracting a signal from observations corrupted by additive noise, possibly heavy-tailed. We assume that the observation noise is a Levy process, while the signal is Gaussian, and derive a non-linear recursive filter that minimizes the L error. A sub-optimal filter is proposed for numerical purposes, and simulations show that it out-performs the existing li...

In this paper, we propose B robust filtering approach to distributed power allocation. A robust filter is used to predict the channel gain and interference under incomplete knowledge of the shadowing coefficient. Simulation results show the superior performance of the robust solution in comparison l a a traditional Kalman-filter-based solution in terms of blocking probability. keywords: Robust ...

There is significant evidence that household water treatment devices/systems (HWTS) are capable of dramatically improving microbially contaminated water quality. The purpose of this study was to examine five filters [(biosand filter-standard (BSF-S); biosand filter-zeolite (BSF-Z); bucket filter (BF); ceramic candle filter (CCF); and silver-impregnated porous pot (SIPP)] and evaluate their abil...

During continuous veno-venous hemodialysis with regional citrate anticoagulation, ionized calcium (iCa) measurements in pre- and post-filter samples are used to adjust flows. Post-filter iCa target concentrations within a low range (0.25–0.34 mmol/L), blood gas analyzers (BGAs) mainly calibrated for physiological values (1.12–1.20 mmol/L). Bias between BGAs these low-value leads errors adjustin...

A septic tank combined with a sand filter is the most common onsite wastewater treatment system worldwide, since it is a simple, lowcost and reliable treatment method. Alternatives to sand in filters could be advantageous in terms of availability of material and enhanced treatment properties. In this study, flow dynamics and pollutant transport in three filter materials; sand, pine bark and act...

In the rural areas around Oruro (Bolivia), untreated groundwater is used directly as drinking water. This research aimed to evaluate the general drinking water quality, with focus on arsenic (As) concentrations, based on analysis of 67 samples from about 16 communities of the Oruro district. Subsequently a filter using Iron Oxide Coated Sand (IOCS) and a filter using a Composite Iron Matrix (CI...

Kalman information fusion filter is dealt with for WSNs (Wireless sensor networks), where multiplicative noises occur in the system model. There are l > 2 sub-systems, and for each sub-system, there are m > 2 observations that are sent through different wireless channel. Packet loss is inevitable for the wireless channel, and the optimal information fusion filter is given by the projection theo...