Aplikasi Jaringan Saraf Tiruan pada Shunt Active Power Filter Tiga Fasa

Semakin banyaknya pengoperasian peralatan beban non linear akan menimbulkan harmonisa pada sistem tenaga listrik dan menurunkan kualitas daya listrik. Harmonisa pada sistem tenaga listrik ini dapat diatasi dengan menggunakan Shunt Active Power Filter. Shunt Active Power Filter adalah Current Controlled Voltage Source Inverter (CC-VSI) tiga fasa yang dihubungkan pada Point of Common Coupling (PCC). Metode kompensasi jaringan saraf tiruan digunakan sebagai rangkaian kontrol untuk menghasilkan arus referensi untuk Shunt Active Power Filter yang diperoleh dari arus beban. Jaringan saraf tiruan menentukan amplitudo dari komponen sinus dan cosinus arus referensi. Hasil simulasi menunjukkan bahwa Shunt Active Power Filter 3 fasa dengan metode kompensasi jaringan saraf tiruan secara efektif mampu menghilangkan harmonisa dan menghasilkan arus sumber/grid yang sinusoidal baik dalam kondisi steady state maupun dinamis

Bell Correlations in Quantum Field Theory

Bell correlations are the hallmark of quantum non-locality, and a rich context for analysing them is provided by the algebraic approach to quantum field theory (AQFT): the basic idea is to associate with each bounded region O of Minkowski spacetime an algebra A(O) of operators, of which a self-adjoint element P ∈ A(O) represents a physical quantity pertaining to that part of the field system lying in O, that is measurable by a procedure confined to O. The violation of Bell inequalities in AQFT is known to be "generic", as regards the choices of regions O, and of quantities P, and of states. Furthermore, they are typically "maximal" and "indestructible" in a sense that can be made mathematically precise. The prospects for “peaceful coexistence” between quantum non-locality and relativity theory’s requirement of no action-at-a-distance are also explored. The purpose of this Essay is to review the developments in these areas

On the K-theoretic classification of topological phases of matter

We present a rigorous and fully consistent $K$-theoretic framework for studying gapped topological phases of free fermions such as topological insulators. It utilises and profits from powerful techniques in operator $K$-theory. From the point of view of symmetries, especially those of time reversal, charge conjugation, and magnetic translations, operator $K$-theory is more general and natural than the commutative topological theory. Our approach is model-independent, and only the symmetry data of the dynamics, which may include information about disorder, is required. This data is completely encoded in a suitable $C^*$-superalgebra. From a representation-theoretic point of view, symmetry-compatible gapped phases are classified by the super-representation group of this symmetry algebra. Contrary to existing literature, we do not use $K$-theory to classify phases in an absolute sense, but only relative to some arbitrary reference. $K$-theory groups are better thought of as groups of obstructions between homotopy classes of gapped phases. Besides rectifying various inconsistencies in the existing literature on $K$-theory classification schemes, our treatment has conceptual simplicity in its treatment of all symmetries equally. The Periodic Table of Kitaev is exhibited as a special case within our framework, and we prove that the phenomena of periodicity and dimension shifts are robust against disorder and magnetic fields.Comment: 41 pages, revised version with a new abstract, introductory sections and critique of the literatur

Sistem Otomasi Mesin Tempat Parkir Mobil Bawah Tanah Dengan Menggunakan Programmable Logic Controller

Nowadays, number of cars increases more and more. This causes increase in the need of park area for the cars meanwhile there is limited area that can be used as park area for cars. Therefore, this paper describes about design of automatic car parking system, which places underground. This automatic car parking miniature model has 3 levels and each level can store 24 cars. This automatic car parking model is designed by using several actuators like AC motor, stepper motor, pneumatic system and several sensors like photoelectric and limit switch. Programmable logic Controller (PLC) is used as the controller, which controls all hardware. Experiment is done by running the automatic car parking system and experimental results show that the system can run well

T-duality simplifies bulk-boundary correspondence: some higher dimensional cases

Recently we introduced T-duality in the study of topological insulators, and used it to show that T-duality trivialises the bulk-boundary correspondence in 2 dimensions. In this paper, we partially generalise these results to higher dimensions and briefly discuss the 4D quantum Hall effect.Comment: 25 pages. To appear in Ann. Henri Poincar

Sistem Pengenalan Kata Dengan Menggunakan Linear Predictive Coding Dan Nearest Neighbor Classifier

This paper describe about the development of word recognition system by using a voice matching approach, which will match between reference voice spectrum and unknown voice spectrum. This designed system is limited to recognize a voice, which only consists of one word. There are five words, which will be recognized in this system. They are "satu", "dua", "tiga", "empat", and "lima". Input device of the system is a microphone. The output of microphone will be amplified by using a pre-amplifier circuit. Then, the signal is converted to digital signal by using an analog to digital converter (ADC), so that, the microprocessor TMS320C5x can read the data from the signal. This system uses linear predictive coding (LPC) to extract the pattern of the voice. Word recognition process is done by using nearest neighbor classifier method. Basic principle of this method is to find the shortest distance between unknown voice pattern and reference voice patterns. An unknown voice pattern is recognized as the reference voice pattern, which has the shortest distance with that unknown pattern. Some experiments have been done in various people voices. They are people whose voices are in reference voice database, people whose voices are not in database. Experimental results show that the system can recognize the word up to 92 %

KONTROL ROBOT MOBIL PENJEJAK GARIS BERWARNA DENGAN MEMANFAATKAN KAMERA SEBAGAI SENSOR

Makalah ini akan menjelaskan tentang penggunaan kamera sebagai sensor posisi pada kontrol robot mobil penjejak garis berwarna. robot mobil didisain untuk dapat mengikuti sebuah garis berwarna dari sekumpulan garis - garis berwarna yang ada

Degree of separability of bipartite quantum states

We investigate the problem of finding the optimal convex decomposition of a bipartite quantum state into a separable part and a positive remainder, in which the weight of the separable part is maximal. This weight is naturally identified with the degree of separability of the state. In a recent work, the problem was solved for two-qubit states using semidefinite programming. In this paper, we describe a procedure to obtain the optimal decomposition of a bipartite state of any finite dimension via a sequence of semidefinite relaxations. The sequence of decompositions thus obtained is shown to converge to the optimal one. This provides, for the first time, a systematic method to determine the so-called optimal Lewenstein-Sanpera decomposition of any bipartite state. Numerical results are provided to illustrate this procedure, and the special case of rank-2 states is also discussed.Comment: 11 pages, 7 figures, submitted to PR