One of the mathematical tools to measure the generation rate of new patterns along a sequence of symbols is the Lempel-Ziv complexity (LZ). Under additional assumptions, LZ is an estimator of entropy in the Shannon sense. Since entropy is considered as a measure of randomness, this means that LZ can be treated also as a randomness indicator. In this paper, we used LZ concept to the analysis of different flow regimes in cold flow combustor models. Experimental data for two combustor’s configurations motivated by efficient mixing need were considered. Extensive computer analysis was applied to develop a complexity approach to the analysis of velocity fluctuations recorded with hot-wire anemometry and PIV technique. A natural encoding method to address these velocity fluctuations was proposed. It turned out, that with this encoding the complexity values of the sequences are well correlated with the values obtained by means of RMS method (larger/smaller complexity larger/smaller RMS). However, our calculations pointed out the interesting result that most complex, this means most random, behavior does not overlap with the “most turbulent” point determined by the RMS method, but it is located in the point with maximal average velocity. It seems that complexity method can be particularly useful to analyze turbulent and unsteady flow regimes. Moreover, the complexity can also be used to establish other flow characteristics like its ergodicity or mixing.
The never before published paper is one of the last writings of Juliusz Żórawski (1898–1967), professor architect and theoretician of architecture. The notion of limited complexity introduced here relates to individual characteristics of the conceptual abilities of man. Tasks of architecture are based on prognoses, and this brings with it the risk of making errors. The author criticises J. Fourastié’s prognoses related to the Earth’s overpopulation in 3000 AD, which would force building new cities above the ground, contrary to human psychosomatic nature and habitude.
This paper is an attempt to explain the concept of emergence of spatial systems. It indicates basic features of this concept, such as: coevolution, selforganization, patterns, sudden changes, hierarchy. The emergence of complex systems is very fruitful approach to the theoretical reconstruction of the processes of space economy. It should be included in the discussion on evolutionary economics and geography. Recently, in both disciplines creative research is carried out on this subject matter.
Linguistic materials of uncertain syntactic status in a corpus of blog posts – This article proposes an analysis of some modalities of the interfrastic connection in the linguistic productions of bloggers. In particular, attention is focused on cases that present a structural interest as they fall into an intermediate space between autonomy and syntactic-semantic integration. More specifically, it focuses on cases of hypercoding and hypocoding of the the syntactic linking of clauses, as well as on cases of deviant coding.
Fifteen species of isopods, representing 10 families, were recorded on holdfasts of the brown alga Himantothallus grandifolius . Material was collected in the 15–75 m depth range during the austral summer of 1979/80. The isopod community was dominated by Caecognathia antarctica (mean density 12.4 ± 13.1 ind./100 ml) followed by Cymodocella tubicauda (mean density 0.7 ± 2.1 ind./100 ml). Mean total density of isopods reached the value of 16.1 ± 14.0 ind./100 ml. The comparison with the other studies showed that hold− fasts are inhabited by a distinctive isopod community that differs from the isopod fauna associated with soft bottom of Admiralty Bay.
The aim of this paper is to analyse various animal-specifi c complex lexical units together with patterns that can be held responsible for their underlying conceptual structure. Many examples of the data investigated in the paper seem to represent compounds as they are traditionally understood in the literature of the subject (see, among others, Bauer 2003; Katamba and Stonham 2006; Lieber and Štekauer 2009; Fàbregas and Scalise 2012; Bauer et al. 2013); however, others do not meet the basic criteria for compoundhood as postulated by, for example, Altakhaineh (2016). In my research I use the term animal-specifi c complex lexical units with reference to all animal-related composite expressions being the result of the working of metaphor-metonymy interaction.
The paper presents the meaning of complexity as a notion in psychology, and its influence on architectural theory in the 1960s, focusing on the notion of optimal complexity. A commentary is presented on the two texts („Network of straight lines” and „Limited complexity”) by professor architect Juliusz Żórawski from 1967, where he has introduced the term of limited complexity in relation to architecture, and where he criticizes excessively far reaching forecasts of future development. Żórawski’s concepts are parallel to those of R. Venturi at that time.
Most of the medieval Italian cities are civitas born of the ruins of the ancient Roman civilization. Their beauty ist the origin for deep esthetical experiences, to which Sławomir Gzell gave the name bellezza. There are a few characteristic features composing the "picturesqueness", painterliness and harmony of those cities, which lead the observer to strong emotions and constant, sensual exploration. The author contemplates the aspects creating the phenomrnon of beauty of Italian cities and towns - which are the metapfor of human desires and deepest cravings.
This paper presents a novel low-complexity soft demapping algorithm for two-dimensional non-uniform spaced constellations (2D-NUCs) and massive order one-dimensional NUCs (1D-NUCs). NUCs have been implemented in a wide range of new broadcasting systems to approach the Shannon limit further, such as DVB-NGH, ATSC 3.0 and NGB-W. However, the soft demapping complexity is extreme due to the substantial distance calculations. In the proposed scheme, the demapping process is classified into four cases based on different quadrants. To deal with the complexity problem, four groups of reduced subsets in terms of the quadrant for each bit are separately calculated and stored in advance. Analysis and simulation prove that the proposed demapper only introduces a small penalty under 0.02dB with respect to Max-Log-MAP demapper, whereas a significant complexity reduction ranging from 68.75% to 88.54% is obtained.
Following the results presented in , we present an efficient approach to the Schur parametrization/modeling of a subclass of second-order time-series which we term p-stationary time-series, yielding a uniform hierarchy of algorithms suitable for efficient implementations and being a good starting point for nonlinear generalizations to higher-order non-Gaussian nearstationary time-series.
This paper reviews parametric audio coders and discusses novel technologies introduced in a low-complexity, low-power consumption audio decoder and music synthesizer platform developed by the authors. The decoder uses parametric coding scheme based on the MPEG-4 Parametric Audio standard. In order to keep the complexity low, most of the processing is performed in the parametric domain. This parametric processing includes pitch and tempo shifting, volume adjustment, selection of psychoacoustically relevant components for synthesis and stereo image creation. The decoder allows for good quality 44.1 kHz stereo audio streaming at 24 kbps. The synthesizer matches the audio quality of industry-standard sample-based synthesizers while using a twenty times smaller memory footprint soundbank. The presented decoder/synthesizer is designed for low-power mobile platforms and supports music streaming, ringtone synthesis, gaming and remixing applications.
This paper presents a set of concepts aiming at the reconstruction of mechanisms of the development of economic space. These concepts are ordered in the way that consecutive concepts add new pieces of knowledge increasing the degree of cognition of the mechanisms of economic space. This set includes among others: shift from one steady-state to the next steady-states, selforganization and the development out of equilibrium, multiple equilibrium, punctuated equilibrium, innovation in the phase transition, pulsative course of development process, emergence of complex spatial systems, development code of the system of regions.
Optimal random network coding is reduced complexity in computation of coding coefficients, computation of encoded packets and coefficients are such that minimal transmission bandwidth is enough to transmit coding coefficient to the destinations and decoding process can be carried out as soon as encoded packets are started being received at the destination and decoding process has lower computational complexity. But in traditional random network coding, decoding process is possible only after receiving all encoded packets at receiving nodes. Optimal random network coding also reduces the cost of computation. In this research work, coding coefficient matrix size is determined by the size of layers which defines the number of symbols or packets being involved in coding process. Coding coefficient matrix elements are defined such that it has minimal operations of addition and multiplication during coding and decoding process reducing computational complexity by introducing sparseness in coding coefficients and partial decoding is also possible with the given coding coefficient matrix with systematic sparseness in coding coefficients resulting lower triangular coding coefficients matrix. For the optimal utility of computational resources, depending upon the computational resources unoccupied such as memory available resources budget tuned windowing size is used to define the size of the coefficient matrix.
City parks play a very important role in an urbanized landscape. They are forms of specially designed green space which combine elements of horticulture with architecture, history and culture. The article presents historical urban parks and old residential-park complexes included in the boundaries of Poznań and currently existing in the wedge-ring system of the urban green space. The aim of the conducted research was to show their historical and current function as well as their general state of preservation and condition. The results are presented in the form of a Table where the historical significance of those objects is compared with their role today.
The town of Siemianowice Śląskie is where we can find a palace-and-park complex which nowadays serves as the Town Park. The complex used to be owned by the Henckel von Donnersmarck family; today it is open to everyone looking for either active or passive leisure. Apart from its historical value (the complex being the most significant monument of the town), the park is also of special importance to the environment. It can be seen as an enclave of greenery and a sanctuary for plants and animals. Moreover, together with the neighbouring recreation area and ecological sites, the park contributes to the symbolic “green lungs” of the town