Relevant bibliographies by topics / Arrays

Academic literature on the topic 'Arrays'

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Published: 4 June 2021
Last updated: 10 March 2023

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Journal articles on the topic "Arrays"

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Weitzman, Jonathan B. "Array-of-arrays." Genome Biology 2 (2001): spotlight—20010201–01. http://dx.doi.org/10.1186/gb-spotlight-20010201-01.

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Mervis, J. "An Array of Arrays." Science 275, no. 5298 (January 17, 1997): 300. http://dx.doi.org/10.1126/science.275.5298.300b.

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Keeley, Brian W., and Annika T. H. Keeley. "Acoustic wave response to groove arrays in model ears." PLOS ONE 16, no. 11 (November 29, 2021): e0260020. http://dx.doi.org/10.1371/journal.pone.0260020.

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Many mammals and some owls have parallel grooved structures associated with auditory structures that may be exploiting acoustic products generated by groove arrays. To test the hypothesis that morphological structures in the ear can manipulate acoustic information, we expose a series of similar-sized models with and without groove arrays to different sounds in identical conditions and compare their amplitude and frequency responses. We demonstrate how two different acoustic signals are uniquely influenced by the models. Depending on multiple factors (i.e., array characteristics, acoustic signal used, and distance from source) the presence of an array can increase the signal strength of select spectral components when compared to a model with no array. With few exceptions, the models with arrays increased the total amplitude of acoustic signals over that of the smooth model at all distances we tested up to 160 centimeters. We conclude that the ability to uniquely alter the signal based on an array’s characteristics is evolutionarily beneficial and supports the concept that different species have different array configurations associated with their biological needs.
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PEYTON JONES, SIMON. "16 Arrays." Journal of Functional Programming 13, no. 1 (January 2003): 173–78. http://dx.doi.org/10.1017/s0956796803001813.

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Micheva, K. D., N. O'Rourke, B. Busse, and S. J. Smith. "Array Tomography: Production of Arrays." Cold Spring Harbor Protocols 2010, no. 11 (November 1, 2010): pdb.prot5524. http://dx.doi.org/10.1101/pdb.prot5524.

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Micheva, K. D., N. O'Rourke, B. Busse, and S. J. Smith. "Array Tomography: Imaging Stained Arrays." Cold Spring Harbor Protocols 2010, no. 11 (November 1, 2010): pdb.prot5526. http://dx.doi.org/10.1101/pdb.prot5526.

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Yang, T. C., and Zhengzheng Ye. "Array gain of coprime arrays." Journal of the Acoustical Society of America 146, no. 3 (September 2019): EL306—EL309. http://dx.doi.org/10.1121/1.5126924.

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Wittstock, Gunther. "Sensor arrays and array sensors." Analytical and Bioanalytical Chemistry 372, no. 1 (December 8, 2001): 16–17. http://dx.doi.org/10.1007/s00216-001-1149-y.

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Streibl, Nörbert, Uwe Nölscher, Jürgen Jahns, and Susan Walker. "Array generation with lenslet arrays." Applied Optics 30, no. 19 (July 1, 1991): 2739. http://dx.doi.org/10.1364/ao.30.002739.

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Abdellatif, Ahmed Shehata, Wenyao Zhai, Hari Krishna Pothula, and Morris Repeta. "Array of Arrays: Optimizing Phased Array Tiles." IEEE Antennas and Wireless Propagation Letters 20, no. 5 (May 2021): 718–22. http://dx.doi.org/10.1109/lawp.2021.3061281.

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Dissertations / Theses on the topic "Arrays"

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Albannay, Mohammed Masoud. "Array of antenna arrays." Thesis, Queensland University of Technology, 2014. https://eprints.qut.edu.au/75576/1/Mohammed_Albannay_Thesis.pdf.

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Antenna arrays are groups of antenna elements spaced in a geometrical pattern. By changing the phase excitation of each element, the array is capable of transmitting electromagnetic waves strongly in a chosen direction with little or no radiation in another direction, thus controlling the array's radiation pattern without physically moving any parts. An antenna array of sub-arrays replaces conventional antenna elements with compact circular arrays with potential for improved performance. This thesis expands on the concept by exploring the development, realisation and operation of an array of subarrays. The overall size of the array essentially remains the same, but the array's performance is improved due to having steerable directive subarrays. The negative effects of strong mutual coupling between closely spaced elements of a subarray are analysed and a number of new solutions for element decoupling are proposed.
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Tzanidis, Ioannis. "Ultrawideband Low-Profile Arrays of Tightly Coupled Antenna Elements: Excitation, Termination and Feeding Methods." The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1316439948.

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Khan, Iqtidar Ahmad. "Analysis and Synthesis of a New Class of Low Side Lobe Planar Arrays." Thesis, Virginia Tech, 2018. http://hdl.handle.net/10919/93222.

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Numerical techniques for designing planar arrays with low side lobe level often require memory intensive optimization algorithms and also initialization in the form of some known values of radiation pattern parameters beforehand - information that may not be available when designing arrays. A few analytical methods exist in the literature that can be used to design rectangular lattices of isotropic elements for desired half-power beamwidth and side lobe level, but the number of elements of the array often should be known before the design process. Some array designs based on analytical techniques may suffer from severe performance limitations, an example is the uniformly excited array which cannot produce side lobe levels below ̶13.3 dB. The goal of this study is to present an analytical technique for synthesis of planar arrays that, for specified radiation pattern requirements, not only provides quick solutions for the required number of elements and its distribution along the length and width of the array rectangular lattice, but also produces low side lobes without any limitation. A new class of non-uniformly excited equally spaced planar arrays is introduced and investigated in this study. The new array uses the patterns of uniformly excited linear arrays as its building blocks and has a separable element current distribution, hence making it mathematically convenient to analyze its radiation properties in terms of those of its constituent linear arrays. The proposed planar array does not suffer from the side lobe level limitation of uniformly excited planar arrays, and its synthesis, due to the analytical nature of description of its radiation properties, does not require iterative procedures that are inherent to numerical techniques. Radiation characteristics of the proposed planar array, including directivity, side lobe level, half-power beamwidths, far-field three dimensional radiation patterns, and element excitation currents, are examined and simulation results for several example cases are presented. The analysis culminates with successfully mapping a continuous radiation pattern to discrete element currents in a rectangular lattice geometry. The synthesis procedure is validated by successfully designing various planar arrays with desired requirements in terms of side lobe level and half-power beamwidths in the principal planes. Several design examples are presented. Radiation characteristics of the synthesized arrays are compared with the desired design requirements which were used as input information in the synthesis process. For the cases studied, the achieved performance characteristics are close to the desired ones.
MS
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范世鳴 and Sai-ming Fan. "On m-arrays and M-arrays." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1986. http://hub.hku.hk/bib/B31207248.

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Alsawaha, Hamad Waled. "Synthesis of Ultra-Wideband Array Antennas." Diss., Virginia Tech, 2014. http://hdl.handle.net/10919/54553.

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Acquisition of ultra-wideband signals by means of array antennas requires essentially frequency-independent radiation characteristics over the entire bandwidth of the signal in order to avoid distortions. Factors contributing to bandwidth limitation of arrays include array factor, radiation characteristics of the array element, and inter-element mutual coupling. Strictly speaking, distortion-free transmission or reception of ultra-wideband signals can be maintained if the magnitude of the radiated field of the array remains constant while its phase varies linearly with frequency over the bandwidth of interest. The existing wideband-array synthesis methods do not account for all factors affecting the array bandwidth and are often limited to considering the array factor and not the total field of the array in the synthesis process. The goal of this study is to present an ultra-wideband array synthesis technique taking into account all frequency-dependent properties, including array total pattern, phase of the total radiated field, element field, element input impedance, and inter-element mutual coupling. The proposed array synthesis technique is based on the utilization of frequency-adaptive element excitations in conjunction with expressing the total radiated field of the array as a complex Fourier series. Using the proposed method, element excitation currents required for achieving a desired radiation pattern, while compensating for frequency variations of the element radiation characteristics and the inter-element mutual coupling, are calculated. An important consideration in the proposed ultra-wideband array design is that the "phase bandwidth", defined as the frequency range over which the phase of the total radiated field of the array varies linearly with frequency, is taken into account as a design requirement in the synthesis process. Design examples of linear arrays with desired radiation patterns that are expected to remain unchanged over the bandwidth of interest are presented and simulated. Two example arrays, one with a wire dipole as its element and another using an elliptically-shaped disc dipole as the element are studied. Simulation results for far-field patterns, magnitude and phase characteristics, and other performance criteria such as side-lobe level and scanning range are presented. Synthesis of two-dimensional planar arrays is carried out by employing the formulations developed for linear arrays but generalized to accommodate the geometry of planar rectangular arrays. As example designs, planar arrays with wire dipoles and elliptical-shaped disc dipoles are studied. The simulation results indicate that synthesis of ultra-wideband arrays can be accomplished successfully using the technique presented in this work. The proposed technique is robust and comprehensive, nonetheless it is understood that the achieved performance of a synthesized array and how closely the desired performance is met also depends on some of the choices the array designer makes and other constraints, such as number of elements, type of element, size, and ultimately cost.
Ph. D.
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Jafri, Ahsan. "Array signal processing based on traditional and sparse arrays." Thesis, University of Sheffield, 2019. http://etheses.whiterose.ac.uk/23072/.

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Array signal processing is based on using an array of sensors to receive the impinging signals. The received data is either spatially filtered to focus the signals from a desired direction or it may be used for estimating a parameter of source signal like direction of arrival (DOA), polarization and source power. Spatial filtering also known as beamforming and DOA estimation are integral parts of array signal processing and this thesis is aimed at solving some key probems related to these two areas. Wideband beamforming holds numerous applications in the bandwidth hungry data traffic of present day world. Several techniques exist to design fixed wideband beamformers based on traditional arrays like uniform linear array (ULA). Among these techniques, least squares based eigenfilter method is a key technique which has been used extensively in filter and wideband beamformer design. The first contribution of this thesis comes in the form of critically analyzing the standard eigenfilter method where a serious flaw in the design formulation is highlighted which generates inconsistent design performance, and an additional constraint is added to stabilize the achieved design. Simulation results show the validity and significance of the proposed method. Traditional arrays based on ULAs have limited applications in array signal processing due to the large number of sensors required and this problem has been addressed by the application of sparse arrays. Sparse arrays have been exploited from the perspective of their difference co-array structures which provide significantly higher number of degrees of freedoms (DOFs) compared to ULAs for the same number of sensors. These DOFs (consecutive and unique lags) are utilized in the application of DOA estimation with the help of difference co-array based DOA estimators. Several types of sparse arrays include minimum redundancy array (MRA), minimum hole array (MHA), nested array, prototype coprime array, conventional coprime array, coprime array with compressed interelement spacing (CACIS), coprime array with displaced subarrays (CADiS) and super nested array. As a second contribution of this thesis, a new sparse array termed thinned coprime array (TCA) is proposed which holds all the properties of a conventional coprime array but with $\ceil*{\frac{M}{2}}$ fewer sensors where $M$ is the number of sensors of a subarray in the conventional structure. TCA possesses improved level of sparsity and is robust against mutual coupling compared to other sparse arrays. In addition, TCA holds higher number of DOFs utilizable for DOA estimation using variety of methods. TCA also shows lower estimation error compared to super nested arrays and MRA with increasing array size. Although TCA holds numerous desirable features, the number of unique lags offered by TCA are close to the sparsest CADiS and nested array and significantly lower than MRA which limits the estimation error performance offered by TCA through (compressive sensing) CS-based methods. In this direction, the structure of TCA is studied to explore the possibility of an array which can provide significantly higher number of unique lags with improved sparsity for a given number of sensors. The result of this investigation is the third contribution of this thesis in the form of a new sparse array, displaced thinned coprime array with additional sensor (DiTCAAS), which is based on a displaced version of TCA. The displacement of the subarrays generates an increase in the unique lags but the minimum spacing between the sensors becomes an integer multiple of half wavelength. To avoid spatial aliasing, an additional sensor is added at half wavelength from one of the sensors of the displaced subarray. The proposed placement of the additional sensor generates significantly higher number of unique lags for DiTCAAS, even more than the DOFs provided by MRA. Due to its improved sparsity and higher number of unique lags, DiTCAAS generates the lowest estimation error and robustness against heavy mutual coupling compared to super nested arrays, MRA, TCA and sparse CADiS with CS-based DOA estimation.
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Manninen, O. (Olli). "Modelling the antenna arrays using MATLAB-application Sensor Array Analyzer." Bachelor's thesis, University of Oulu, 2017. http://urn.fi/URN:NBN:fi:oulu-201705302196.

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In this thesis, the antenna arrays researched and modelled using Sensor Array Analyzer- application (SAA) from MATLAB. The objective is to explore the array modelling capabilities of the SAA application. This thesis shows that SAA is versatile software for modelling the radiation patterns using 2D or 3D plots, but there are couple of missing features. SAA allows user to import the used code to MATLAB for code modification. Data imported from MATLAB to SAA using variables, for example importing dipole, antenna locations for conformal array and complex coefficients for beamforming. Antenna array wideband usage at SAA discussed and example shown. At SAA, grating lobes seen at 2D and 3D plots and grating lobe- diagram is also used and explained. SAA has no built-in option for mutual coupling compensation. Other practical method for modelling and compensation of mutual coupling are discussed
Tässä kandidaatintyössä tutkittiin eri geometrian omaavia antenniryhmiä ja niiden mallinnusta MATLAB-ohjelmiston lisäosan SAA:n (Sensor Array Analyzer) avulla. Tehtävänä oli tutkia antenniryhmän eri osa-alueiden mallinnuksen mahdollisuuksia ja rajoituksia kyseisellä ohjelmistolla. Tutkimuksen tuloksena todetaan, että SAA on monipuolinen ohjelmisto antenniryhmien säteilykuvioiden graafiseen havainnollistamiseen 2D- tai 3D-muodossa, vaikkakin muutama perusominaisuus puuttui. Työssä tutkittiin, miten SAA-ohjelmistosta voidaan siirtää käytetty koodi MATLAB-ohjelmistoon sen mahdollista lisämuokkausta varten ja kuinka MATLAB-ohjelmistosta tuodaan tietoa SAA-ohjelmistoon erilaisina muuttujina. Muuttujia tarvitaan esimerkiksi, kun ohjelmistoon tuodaan antennin säteilykuvio, tai sovellettu antenniryhmä sekä niiden kompleksiset kertoimet keilanmuodostusta varten. Laajakaistaisten antenniryhmien säteilykuvion mallinnusta testattiin ja havainnollistettiin. Sivukeiloja, joilla on sama teho pääkeilan kanssa, tarkasteltiin ja niiden havainnollistamiseen luotua diagrammia testattiin. Antennien välisen keskinäiskytkennän mallintamisen mahdollisuuksia tarkasteltiin ja sen vaikutusta säteilykuvioon pohdittiin. Tämän työn tarkoituksena oli selvittää SAA-ohjelmiston pääpiirteiset ominaisuudet ja heikkoudet. Kyseistä tietoa käytetään antenniryhmien keilasynteesiä tutkiessa. Antenniryhmiä voi mallintaa huomattavasti nopeammin ja helpommin käyttämällä SAA-ohjelmistoa, kuin kirjoittamalla itse MATLAB-koodi tai simuloimalla antenniryhmän sähkömagneettinen 3D-malli. Ohjelmiston heikkoudetkin voidaan välttää muokkaamalla koodia haluamalla tavalla. Antenniryhmiä tullaan tulevaisuudessa hyödyntämään IoT-laitteissa ja langattomassa 5G teknologiassa
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Beavington, Richard. "Porphyrin arrays." Thesis, University of Oxford, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.388909.

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Promarak, Vinich. "Porphyrin arrays." Thesis, University of Oxford, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.249614.

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Zhang, Wei. "Porphyrin arrays." Thesis, University of Oxford, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.494395.

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Books on the topic "Arrays"

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Gu, Yu Jeffrey, ed. Arrays and Array Methods in Global Seismology. Dordrecht: Springer Netherlands, 2010. http://dx.doi.org/10.1007/978-90-481-3680-3.

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Arrays and array methods in global seismology. Dordrecht: Springer, 2010.

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Rampal, Jang B. DNA Arrays. New Jersey: Humana Press, 2001. http://dx.doi.org/10.1385/1592592341.

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Fung, Eric. Protein Arrays. New Jersey: Humana Press, 2004. http://dx.doi.org/10.1385/1592597599.

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Dragoș, Zaharia, ed. Adaptive arrays. Amsterdam: Elsevier, 1989.

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Hedayat, A. S., N. J. A. Sloane, and John Stufken. Orthogonal Arrays. New York, NY: Springer New York, 1999. http://dx.doi.org/10.1007/978-1-4612-1478-6.

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Lee, Tin-Lap, and Alfred Chun Shui Luk, eds. Tiling Arrays. Totowa, NJ: Humana Press, 2013. http://dx.doi.org/10.1007/978-1-62703-607-8.

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Prettyman, Steve. PHP Arrays. Berkeley, CA: Apress, 2017. http://dx.doi.org/10.1007/978-1-4842-2556-1.

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Voskresenskii, Dmitrii Ivanovich, Aleksandr Iur’evich Grinev, and Evgenii Nikolaevich Voronin. Electrooptical Arrays. New York, NY: Springer New York, 1989. http://dx.doi.org/10.1007/978-1-4612-3484-5.

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Haupt, Randy L. Antenna Arrays. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2010. http://dx.doi.org/10.1002/9780470937464.

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Book chapters on the topic "Arrays"

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Marquis, Hank, and Eric A. Smith. "Arrays and Array Manipulation." In A Visual Basic 6 Programmer’s Toolkit, 1–21. Berkeley, CA: Apress, 2000. http://dx.doi.org/10.1007/978-1-4302-5125-5_1.

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Ziomek, Lawrence J. "Array Theory – Volume Arrays." In An Introduction to Sonar Systems Engineering, 381–408. 2nd ed. Boca Raton: CRC Press, 2022. http://dx.doi.org/10.1201/9781003259640-9.

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Ziomek, Lawrence J. "Array Theory – Planar Arrays." In An Introduction to Sonar Systems Engineering, 319–80. 2nd ed. Boca Raton: CRC Press, 2022. http://dx.doi.org/10.1201/9781003259640-8.

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Ziomek, Lawrence J. "Array Theory – Linear Arrays." In An Introduction to Sonar Systems Engineering, 191–276. 2nd ed. Boca Raton: CRC Press, 2022. http://dx.doi.org/10.1201/9781003259640-6.

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Cohen, Ben. "Arrays." In VHDL Answers to Frequently Asked Questions, 55–79. Boston, MA: Springer US, 1998. http://dx.doi.org/10.1007/978-1-4615-5641-1_2.

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Boles, Dietrich, and Cornelia Boles. "Arrays." In Objektorientierte Programmierung spielend gelernt, 166–206. Wiesbaden: Vieweg+Teubner, 2010. http://dx.doi.org/10.1007/978-3-8348-9349-9_8.

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Kalicharan, Noel. "Arrays." In Learn to Program with C, 197–242. Berkeley, CA: Apress, 2015. http://dx.doi.org/10.1007/978-1-4842-1371-1_8.

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Olsson, Mikael. "Arrays." In C++ 14 Quick Syntax Reference, 25–27. Berkeley, CA: Apress, 2015. http://dx.doi.org/10.1007/978-1-4842-1727-6_7.

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Olsson, Mikael. "Arrays." In PHP 7 Quick Scripting Reference, 19–21. Berkeley, CA: Apress, 2016. http://dx.doi.org/10.1007/978-1-4842-1922-5_5.

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Streib, James T., and Takako Soma. "Arrays." In Undergraduate Topics in Computer Science, 203–43. London: Springer London, 2013. http://dx.doi.org/10.1007/978-1-4471-6317-6_7.

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Conference papers on the topic "Arrays"

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Baggeroer, A. B. "Sonar Arrays and Array Processing." In REVIEW OF PROGRESS IN QUANTITATIVE NONDESTRUCTIVE EVALUATION. AIP, 2005. http://dx.doi.org/10.1063/1.1916655.

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Fry, R. D., D. A. Gray, and L. A. Balzan. "MIMO arrays and array shading." In IET International Radar Conference 2009. IET, 2009. http://dx.doi.org/10.1049/cp.2009.0401.

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Jewell, J. L., W. S. Fu, R. P. Bryan, S. E. Swirhun, W. E. Quinn, and G. R. Olbright. "Surface-Emitting Laser Diode Arrays (Lase-Arrays™) - Multi-Channel Applications in Optical Storage." In Optical Data Storage. Washington, D.C.: Optica Publishing Group, 1994. http://dx.doi.org/10.1364/ods.1994.md2.

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Consumers of optical storage products strongly desire optical disk and tape drives with high data transfer rate for many applications including: multimedia, archival storage, software distribution and reconnaissance. In order to increase the data rate at which information is read from or written to optical storage media, parallel multi-channel systems have been proposed or demonstrated [1,2]. Our approach aims to increase data transfer rates by more than an order of magnitude through multi-channel drives having minimal effect on the hardware and on the cost of the product. The emergence of vertical-cavity surface-emitting laser arrays (Lase-Arrays™), [3,4] enables unique multi-channel configurations for high-data-rate parallel optical reading and writing of information. Lase-Arrays represent a new class of semiconductor laser diodes which, unlike conventional edge-emitting semiconductor laser diodes, are directly "printed" in ID and 2D arrays using standard III-V compound semiconductor circuit fabrication techniques. Fig. la shows a photograph of a portion of a 2x32 Lase-Array. Lase-Arrays emit light perpendicular to the plane of the wafer, as compared to edge-emitting laser diodes which emit light in the plane of the wafer. Also, unlike edge-emitters, Lase-Arrays have circularly-symmetric, aberration-free beams. Arrays of microlenses are straightforwardly integrated to Lase-Arrays (Fig. la) to enable optical mappings which are impossible with conventional macroscopic optics, for example, mapping an array of widely-spaced, low-fill-factor lasers to an array of closely-spaced, densely-packed spots. This mapping is ideal for multi-channel optical storage applications using either disks or tape as the storage medium.
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Nahata, Hans Raj, and Miles Murdocca. "Decomposition Method for Matrix Addressable Microlaser Arrays." In Optical Computing. Washington, D.C.: Optica Publishing Group, 1995. http://dx.doi.org/10.1364/optcomp.1995.omb4.

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Two-dimensional (2D) arrays of microlasers are manufactured in two primary configurations: individually addressable [1], and matrix addressable [2], as illustrated in Figure 1. Each microlaser in the individually addressable array has a ground (n) terminal and a positive (p) terminal. All of the microlasers share the same ground, but a separate p contact is provided for each microlaser. An 8×8 array thus requires 64 p contacts, as indicated by the numbered bonding pads at the edges of the array. For small arrays individual addressing works well, but the complexity becomes unmanageable as the arrays scale to large sizes, and so an alternative configuration is needed that scales more gracefully.
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Jain, S. C., and O. P. McDuff. "New technique for optical butting of linear arrays." In OSA Annual Meeting. Washington, D.C.: Optica Publishing Group, 1985. http://dx.doi.org/10.1364/oam.1985.fx8.

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Linear image sensors like charge-coupled devices (CCD) operating the push-broom mode can be optically butted together to improve the resolution. In the normal butting methods the field of view of the optics is increased, which is given by the field of view of one array times the number of arrays butted. The scheme proposed in this paper can be used for butting two CCD arrays without doubling the field of view. The different photosites in a CCD array are separated by the channel stoppers. The areas corresponding to these stoppers remain uncovered in the image. The two arrays in the proposed scheme are butted in such a way that the centers of the photosite of one array optically coincide with the centers of the channel stoppers of the other array. This can be accomplished by butting the two arrays on the two faces of a rectangular prism (having semisilvered diagonal surface) and offsetting them to align the centers of photosites and channel stoppers of the two arrays. The composite array developed by this method is having double the number of resolution elements without doubling the field of view.
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Wissinger, Alan B., Kenneth N. Bolin, and James E. Harvey. "Transfer function characterization of phased telescope arrays." In OSA Annual Meeting. Washington, D.C.: Optica Publishing Group, 1986. http://dx.doi.org/10.1364/oam.1986.ma5.

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Many different aperture configurations for phased telescope arrays have been advocated during recent years, each with its own rationale. Several of these proposals are reviewed and their relative merits discussed for various imaging applications. If a phased telescope array is to produce satisfactory images of extended objects containing a wide range of spatial detail, the modulation transfer function (MTF) that results from the subaperture configuration must approximate that obtained by a clear circular aperture whose diameter is equal to the maximum dimension spanned by the subapertures. In particular, the MTF must contain no regions of zero value, since image detail is irretrievably lost in those regions. A family of 2-D nonredundant subaperture arrays1 is reviewed and their properties dramatically compared to other configurations by a series of photographs of a spoke target containing a continuous range of spatial frequencies at all orientations. The experiment was carefully designed to demonstrate the ability of redundant and nonredundant arrays of various dilution ratios (fill factors) to resolve detail. The effects of image noise on the success of image restoration techniques are also reviewed.
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Walpole, James N., Z. L. Liali, V. Diadiuk, and L. J. Missaggia. "Microchannel heat sinks and microlens arrays for high-average-power diode laser arrays." In OSA Annual Meeting. Washington, D.C.: Optica Publishing Group, 1988. http://dx.doi.org/10.1364/oam.1988.thw4.

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To utilize effectively large-scale monolithic 2-D arrays of diode lasers for high average output power, microchannel heat sinks and microlens arrays are needed. The heat sinks are required to dissipate heat loads of several hundred W/cm2, while the microlenses permit collection and concentration of the array output for optical pumping of solidstate lasers and improve the till factor (and hence the beam pattern) in coherent operation of arrays.
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Tooley, F. A. P., T. J. Cloonan, and F. B. McCormick. "Retroreflector arrays to implement cross over interconnections between arrays of SEED logic gates." In OSA Annual Meeting. Washington, D.C.: Optica Publishing Group, 1990. http://dx.doi.org/10.1364/oam.1990.fii4.

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Issues arising from the use of retroreflector arrays to implement the crossover interconnect in multistage switching networks will be presented. Several authors have adopted this technique.1-4 This paper will discuss its advantages and some of its limitations and drawbacks. In particular, the precision to which it is necessary to fabricate the arrays will be explained. The discussion will provide details on the use of one type of retroreflector array—the prismatic mirror array1,4—in the implementation of part of a network. This network uses prism arrays of different periods to interconnect 16 × 8 arrays of symmetric SEEDs operating as logic gates.
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9

Gao, Lujia, Srinath V. Ekkad, and Ronald S. Bunker. "Impingement Heat Transfer Under Linearly Stretched Arrays of Holes." In ASME Turbo Expo 2003, collocated with the 2003 International Joint Power Generation Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/gt2003-38178.

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Impingement heat transfer for linearly stretched arrays of holes is investigated. In real engine configurations, impingement arrays are not always square with evenly spaced holes both in streamwise and spanwise direction. They are primarily directed to hot spot locations thus producing nonsquare arrays. In this study, the spacing between the holes increases in both the streamwise and spanwise direction simulating the stretching of the hole arrays downstream. Two different arrays are investigated with the first array having uniform diameter holes through the array placed in a stretched format. The second array has holes placed in the same locations with increasing diameter along the streamwise direction. The measured heat transfer coefficients for these arrays are then predicted using existing impingement heat transfer correlations based on regular evenly spaced arrays. Results show that the published correlations over-predict the effect of cross-flow. Also, the correlation was extrapolated for this study due to lack of information for extremely strong cross-flow effects. All measurements were obtained using the transient liquid crystal technique.
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Chyu, M. K., Y. C. Hsing, and V. Natarajan. "Convective Heat Transfer of Cubic Fin Arrays in a Narrow Channel." In ASME 1996 International Gas Turbine and Aeroengine Congress and Exhibition. American Society of Mechanical Engineers, 1996. http://dx.doi.org/10.1115/96-gt-201.

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The present study explores the heat transfer enhancement induced by arrays of cubic fins. The fin element is either a cube or a diamond in shape. The array configurations studied include both inline and staggered arrays of seven rows and five columns. Both cubic arrays have the same geometric parameters, i.e., H/D=1, S/D=X/D=2.5, which are similar to those of earlier studies on circular pin-fin arrays. The present results indicate that the cube element in either array always yields the highest heat transfer, followed by diamond and circular pin-fin. Arrays with diamond-shaped elements generally cause the greatest pressure loss than those with either cubes or pin fins. For a given element shape, a staggered array generally produces higher heat transfer enhancement and pressure loss than the corresponding inline array. Cubic Arrays can be viable alternatives for pedestal cooling near a blade trailing edge.
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Reports on the topic "Arrays"

1

Temes, C. L. Impulse Arrays. Fort Belvoir, VA: Defense Technical Information Center, May 1991. http://dx.doi.org/10.21236/ada235799.

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Tschopp, Daniel, Pierre Delmas, Mathieu Rhedon, Sacha Sineux, Alexis Gonnelle, Philip Ohnewein, and Jan Erik Nielsen. Application of PC Method to Large Collector Arrays. IEA SHC Task 55, February 2021. http://dx.doi.org/10.18777/ieashc-task55-2021-0005.

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The Performance Check (PC) method can be used for a simple check of the collector array performance of a solar thermal plant. It has been proposed recently as an input to a new ISO standard. This fact sheet provides an application of the PC method to large collector arrays. The goal of this fact sheet is to evaluate the methodology and provide practical insights for the application of the PC method.
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Silverman, Timothy J., Peter McNutt, and John Wohlgemuth. Photovoltaic Array Field Characterization Report. University of Toledo R1 Arrays. Office of Scientific and Technical Information (OSTI), September 2015. http://dx.doi.org/10.2172/1225348.

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4

Fahr, Sven, Daniel Tschopp, Jan Erik Nielsen, Korbinian Kramer, and Philip Ohnewein. Review of In Situ Test Methods for Solar Collectors and Solar Collector Arrays. IEA SHC Task 55, December 2020. http://dx.doi.org/10.18777/ieashc-task55-2020-0014.

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This fact sheet presents three in situ test methods for solar collectors and solar collector arrays, namely In situ Collector Certification (ICC), Performance Check for Collector Arrays (PC) and Dynamic Collector Array Test (D-CAT). A comparison is made regarding their scopes and use cases, methodologies and outcomes, which could serve as a decision-making aid for stakeholders in selecting the procedure that best suits their needs. The analysis shows that the methods do not contradict, but rather complement each other.
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Chiang, C., S. Maddila, and M. Sarrafzadeh. Recursive Gate-Arrays. Fort Belvoir, VA: Defense Technical Information Center, December 1988. http://dx.doi.org/10.21236/ada205335.

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Rutledge, David. Imaging Antenna Arrays. Fort Belvoir, VA: Defense Technical Information Center, December 1985. http://dx.doi.org/10.21236/ada164055.

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Zywicz, E. Performance of Rank-2 Fortran 90 Pointer Arrays vs. Allocatable Arrays. Office of Scientific and Technical Information (OSTI), October 2005. http://dx.doi.org/10.2172/885406.

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Goldhaber-Gordon, David. Alignment of Nanotube Arrays. Fort Belvoir, VA: Defense Technical Information Center, May 2005. http://dx.doi.org/10.21236/ada434117.

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Blandford, Robert R. Design of Infrasonic Arrays. Fort Belvoir, VA: Defense Technical Information Center, July 1997. http://dx.doi.org/10.21236/ada344356.

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Jacobson, K. W., S. Duffy, and K. Kowalewsky. Population array and agricultural data arrays for the Los Alamos National Laboratory. Office of Scientific and Technical Information (OSTI), July 1998. http://dx.doi.org/10.2172/661532.

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