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Multiple antenna techniques are used to enhance wireless links and therefore have been studied extensively. Many practical systems differ from the ideal schemes discussed in the literature. One example is the lack of precise channel information at the transmitter. We evaluate analytically the performance of a beamforming technique that uses partial channel knowledge. Specifically, we analyze a suboptimal...
In this work we consider a navigation of quantum-controlled mobile robot by the use of fuzzy methods. A fuzzy model of the robot behavior is obtained by transformation of the robot's states (that appear in a form of qubits) into the pairs of membership functions. For a full description of the robot's turns, we define a reverse fuzzy Hadamard operator that completes the known Hannachi, Hatakeyama and...
The paper describes preliminary testing transformer oil of the two kinds - "fresh" (unused) and "used" for a long period in real-world conditions. The experimental setup assembled for testing is based on the cut-off rectangular waveguide with plastic tube filled with the tested oil. The insertion losses of the sensor are measured by Vector Network Analyzer Agilent PNA-L N5230C...
Recent research at the interface of physics and biology has shown that cellular processes such as proliferation, differentiation and tissue development, are controlled by the mechanical properties of cells and their environment. This talk reviews current experiments on cell mechanics in the context of theoretical models in which cells are treated in terms of active force dipoles. The theory includes...
The identification of a differentially expressed set of genes in microarray data analysis is essential, both for novel onco-genic pathway identification, as well as for automated diagnostic purposes. This paper assesses the effectiveness of the Population-Based Incremental Learning (PBIL) algorithm in identifying a class differentiating gene set for sample classification. PBIL is based on iteratively...
Performance analysis of a program means executing a program on computers with different hardware resources and optimization of their running time. It is very useful because it provides information of how to distribute efforts and resources in order to ensure greater efficiency and to keep developers focused on the essential goals of the program. In this paper, the main attention on determining the...
Consider a logical structure S constructed over a given network G and possessing certain properties specified by a requirement predicate P(S', G). Consider a failure event involving a set F of disconnected edges or crashed vertices. The paper deals with making S fault-tolerant, i.e., ensuring that after the failure event, the surviving structure S' = S\F continues to satisfy V. This requirement for...
It is possible to give a valuable estimation for an entire solar array IV curve, based only on a single working point (current and voltage) measurement, on panels of solar cells, when several of their parameters are known and environmental parameters also known. The estimations were performed using Matlab/Simulink and the simulation is based on the 10 parameter solar cell model. The estimated curves...
Being able to correctly track the Maximum Power Point (MPP) of a solar array is of a paramount importance, especially when dealing with large and very large solar fields. Each deviation means - energy is not optimally harvested from the field. This is evident to the extreme, when local shading occurs. Then, locally shaded cells turn into loads on the entire array. In the past, it was offered to deal...
Being able to give a preliminary estimation of a solar field annual power output is of paramount importance, especially when dealing with large fields. The Cost of constructing such a field is very high, and the time it takes to repay itself is usually about a decade. It is shown that the 10-parameter solar cell model can be employed to suit any functional solar module which was tested in order to...
Lamport's happened-before relation provides a starting point for an enquiry into causal relations in synchronous systems. We define the ordered response problem, a natural coordination task. By analyzing solutions to this task we arrive at the Centipede Theorem, that gives a concise characterization of synchronous causality.
A novel missile guidance law that simultaneously minimizes the miss distance and imposes a predetermined terminal body angle is presented. The guidance law is derived by analyzing an interception scenario within the framework of a linear quadratic (LQ) terminal control problem. The derivation is for first order linear missile dynamics and a non-maneuvering target. The performance of the proposed guidance...
Results of recent investigations of the device that seems a promising candidate for a high-power microwave amplifier are reviewed. This is a dielectric Cherenkov maser with a rod slow-wave structure, antenna-amplifier, in which an annular moderately relativistic electron beam amplifies the fundamental, non-axisymmetric HE11 mode of the dielectric rod antenna. The RF drive signal is formed in a resonant...
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