Miracle-dz/UniFAR-FTUs huggingface dataset:
WERYFIKACJA I WALIDACJA DYNAMICZNYCH MODELI SYMULACYJNYCH PROCESÓW LOGISTYCZNYCH

Streszczenie W artykule omowiono zagadnienia związane z weryfikacją i walidacją dyskretnych modeli symulacyjnych, bedących waznym narzedziem badaczy zajmujących sie analizami procesow i systemow logistycznych. Omowiono podstawowe techniki wykorzystywane do przeprowadzenia weryfikacji i walidacji oraz zaprezentowano rozwiązania wspierające te techniki w pakietach symulacji dyskretnej sterowanej zdarzeniami. Slowa kluczowe: model symulacyjny, weryfikacja, walidacja, proces logistyczny 1. WPROWADZENIE Modele symulacyjne stosowane są zazwyczaj wtedy, gdy nie mozna lub bardzo trudno jest uzyskac rozwiązanie analityczne badanego problemu. Sytuacja taka ma miejsce w przypadku analizy dynamicznego zachowania systemow i procesow logistycznych. Odpowiedni dobor strategii i sprawne poslugiwanie sie narzedziami logistycznymi, w tym metodami symulacji komputerowej, umozliwia i ulatwia rozwiązywanie problemow logistycznych wystepujących w dzialalności przedsiebiorstw na rynku, zwlaszcza w przypadku konieczności kooperacji miedzy roznymi podmiotami. Bez mozliwości przeprowadzenia badan symulacyjnych na modelach systemow lub procesow logistycznych czesto jest trudne, a czasami wrecz niemozliwe, stwierdzenie, jaki wplyw na ich zachowanie mają poszczegolne czynniki związane z tymi systemami. Wykorzystując model symulacyjny, mozna na nim eksperymentowac, ,,zmieniac rzeczywistośc”, testowac rozne scenariusze decyzyjne, czy tez sprawdzac oddzielnie wplyw poszczegolnych elementow otoczenia. Nalezy pamietac, ze narzedzie jakim jest symulacja, nie sluzy do podejmowania decyzji za menedzerow. Przeprowadzone eksperymenty symulacyjne dostarczają im danych i informacji o procesach, ktore pomagają podjąc najlepsze decyzje. Jak wspomniano modele symulacyjne są coraz cześciej wykorzystywane do rozwiązywania problemow i wspomagania w zakresie podejmowania decyzji. Tworcy oraz uzytkownicy tych modeli dązą do tego, aby na podstawie informacji uzyskanych z wynikow symulacji, mozna bylo podejmowac wlaściwe decyzje muszą zatem dolozyc wszelkich staran, praktycznie na kazdym z etapow badan i budowy modelu, aby zachowac poprawnośc samego modelu jak i wynikow otrzymanych na podstawie przeprowadzanych eksperymentow. W tym celu istnieje potrzeba ciąglej kontroli jakości prac w kazdym etapie procesu modelowania symulacyjnego. Bardzo waznym krokiem w eksperymentach symulacyjnych jest walidacja i weryfikacja modelu. Początkowo narzedzia te stosowane byly do oceny poprawności procedur i algorytmow przez Departament Obrony USA (DoD), jednak wielu badaczy zajmujących sie problemami logistyki zauwazylo, ze takze w tym obszarze nalezy stosowac narzedzia weryfikacji i walidacji w celu minimalizacji ryzyka blednej decyzji podjetej na podstawie niewlaściwego modelu lub modelu generującego niewlaściwe wyniki.
Seasonal dynamics of a generalist and a specialist predator on a single prey

In ecological communities, the behaviour of individuals and the interaction between species may change between seasons, yet this seasonal variation is often not represented explicitly in mathematical models. As global change is predicted to alter season length and other climatic aspects, such seasonal variation needs to be included in models in order to make reasonable predictions for community dynamics. The resulting mathematical descriptions are nonautonomous models with a large number of parameters, and are therefore challenging to analyze. We present a model for two predators and one prey, whereby one predator switches hunting behaviour to seasonally include alternative prey when available. We use a combination of temporal averaging and invasion analysis to derive simplified models and determine the behaviour of the system, in particular to gain insight into conditions under which the two predators can coexist in a changing climate. We compare our results with numerical simulations of the temporally varying model.
Interharmonic Analysis Using MDL and TLS-ESPRIT

Estimation of Signal Parameters via Rotational Invariance Techniques (ESPRIT) is applied to analyze the interharmonics in Electric Power System (EPS). First, the signal received by one A/D convertor forms a signal vector through time shift; second, the number of sinusoidal components which compose the analyzed signal is estimated by calculating Minimum Descriptive Length (MDL), and then ESPRIT utilizes the rotational invariance of two sampling linear arrays to obtain frequency information by Total Least Squares (TLS) algorithm; and finally the rest amplitudes and phase angles are estimated by a simplified Support Vector Regression Machine (SVRM). TLS-ESPRIT aided by MDL as a super-resolution algorithm can overcome resolution limit and achieve better results compared with FFT and PRONY algorithms. Computer simulations prove that the proposed method is feasible and applicable.
Maximising energy capture from distributed generators in weak networks

The paper discusses the implications of the increasing capacity of synchronous generators at the remote ends of rural distribution networks where the line resistances are high and the X/R ratios are low. Local voltage variation is specifically examined and two methods of compensation are proposed. The first of them is a deterministic system that uses a set of rules to switch intelligently between voltage and power factor control modes, while the second is based on a fuzzy inference system that adjusts the reference setting of the automatic power factor controller in response to the terminal voltage. Extensive simulations have verified that the proposed approaches may increase the export of real power while maintaining voltage within the statutory limits.
Some commentary on the choice of rotor bar material for induction motors

Almost any metal can be used in the design of the squirrel cage of an induction machine. Obviously lead is not used because of its low melting point and magnesium because of its low flash point. Others are rejected because of the cost, lack of strength, resistance, thermal conductivity, or manufacturability including ease of joining. Basically, the choice fails to two materials, aluminum and copper and their alloys. For lowest cost of manufacture, especially for mass production, aluminum surpasses copper. In order to determine which of the two materials is the best takes the combined skills of an electrical, a mechanical and a metallurgical engineer. This paper discusses some of the considerations in the choice of rotor bar material. >
Time-constant-based CMOS readout circuit for DNA detection

An RC-to-time constant interface circuit was implemented in 0.18 µm CMOS to characterise the conductive polymer labelled deoxyribonucleic acid (DNA) hybridisation activity on nano-sensor micro-arrays. Measured results show that sub-picomolar DNA (0.1–10 pM) are able to be differentiated with respect to their electrical parameters of 1–23 GΩ resistances parallel with 2.8 down to 0.1 nF capacitances.
Augmentation of Real Power from Renewable Energy Sources across the DC Link of the UPFC Using Fuzzy Logic Control Scheme

The Unified Power Flow Controller (UPFC) is accepted as the versatile Power Flow Controller between electrical power nodes or power sources many times referred to as the buses. Regulation of real and reactive power flow between power nodes can be achieved in the desired manner using the UPFC. In this paper it is demonstrated how additional real power sources like Wind and Photo Voltaic Solar power sources can be augmented into the DC link of the UPFC and supplementing the seamless performance of the UPFC. Fuzzy Logic has been chosen to be the controller as it is moderately robust and its usefulness in this application is compared and contrasted against traditional PI controller. MATLAB / SIMULINK based simulation environment has been used for demonstrating the validity of the proposed schemes.
DESIGN RULES OF BUILT-UP MEMBERS IN LOAD AND RESISTANCE FACTOR DESIGN

The AISC‐LRFD (American Institute of Steel Construction‐Load and Resistance Factor Design Specification for Structural Steel Buildings) Specification provides rules for design of built‐up members. The slenderness ratios of built‐up members that may buckle out‐of‐plane, say, about the Y‐Y axis for a two‐back‐toback‐angle member are discussed. Based on the LRFD equation (E4‐1) and the usual concept of the effective length factor, a modification of the slenderness ratios (Kl/r)m for built‐up members as given in the present LRFD Specification is proposed. The proposed formula with local effective length factor Km is concise, simple, and physically clear. It is consistent with the effective length factor recommended by the LRFD Specification, and has only one equation considering the effects of shear and connectors on buckling of built‐up members. The calculated results of the proposed formula are found to be in good agreement with available test results.
3 From research to development: specifying a future command and control system

We present some experiences obtained with the definition and preliminary design of a new generation command and control system for military applications. We will concentrate on the transfer of research results to development. During this phase, requirements have to be specified for the new system for which it is still hard to envision in detail the desired tasks that it should support. At the same time, the new technologies that are to enable these new capabilities are not known well enough to completely understand their possibilities. We will outline some approaches that, in our project, helped to be creative at the right time and specific and decisive when needed. These are storyboard, natural language and formal methods. We will indicate for each of them at what moment they can be best applied.
Status of RNB facilities in North America.

This paper presents the status of accelerator facilities in North America that are involved in research using radioactive nuclear beams (RNB), including existing and operating facilities, ones currently under construction or undergoing major upgrades, and ones being planned or proposed for the future. Existing RNB facilities are located at TRIUMF (TISOL) in Vancouver, B.C., the Holifield Radioactive Ion Beam Facility (HRIBF) at Oak Ridge National Laboratory, the Argonne Tandem Linear Accelerator System (ATLAS) at Argonne National Laboratory, the National Superconducting Cyclotron Laboratory (NSCL) at Michigan State University, the Nuclear Structure Laboratory at The University of Notre Dame, the 88 Cyclotron at Lawrence Berkeley National Laboratory, and the Cyclotron Institute at Texas A and M University. Currently, there are two major RNB facility upgrades in progress in North America, one at TRIUMF, the ISAC project, and one at NSCL the Intensity Upgrade project. For the future the U. S. Nuclear Science Advisory Committee has given high priority for an advanced RNB facility of the ISOL type. Concepts for such a facility, currently being developed at Argonne National Laboratory and Oak Ridge National Laboratory, are presented. Plans are also being developed in Canada at TRIUMF for a major upgrade of the ISAC facility.
Overview of additive manufacturing activities at MTU aero engines

Additive Manufacturing (AM) is a promising technology to produce parts easily and effectively, just by using metallic powder or wire as starting material and a sophisticated melting process. In contrast to milling or turning technologies complex shaped and hollow parts can be built up in one step. That reduces the production costs and allows the implementation of complete new 3D designs. Therefore AM is also of great interest for aerospace and aero engine industry. MTU Aero Engines has focused its AM activities to the selective laser melting technique (SLM). This technique uses metallic powder and a laser for melting and building up the part layer by layer. It is shown which lead part was selected for AM and how the first production line was established. A special focus is set on the quality assurance of the selective laser melting process. In addition to standard non-destructive inspection techniques a new online monitoring tool was developed and integrated into the SLM machines. The basics of this techn.
“I’m Not Thinking about It to Understand It, I’m Thinking about It to Do It”: Students’ Sensemaking Experiences from the Modern Dance Classroom

ABSTRACT This research explores the question: How do students describe their own sensemaking practices in the postsecondary modern dance classroom? Based on semi-structured interviews with three postsecondary dance students at the first author’s institution, this article presents individual accounts that capture students’ perceptions of making sense of new movement material in a modern dance class. From the accounts, three themes emerged: implicit curriculum, the embodied mind, and the role of attention. We discuss these themes in relation to existing literature from learning theory and dance education and offer implications for creating an equitable learning environment. This research, which blends teacher self-study and qualitative inquiry, is intended to inform departmental practice and contribute situated perspectives to theories of learning in dance.
Design of wideband single‐layer in‐phase power divider using microstrip to slotline coupled structure

The design of a planar in‐phase power divider for wideband applications is presented. The proposed divider uses a broadside coupled microstrip/slotline configuration with an improved isolation between the output ports using suitable isolation resistor. The proposed design is suitable for single layer integration as both the input and output ports are located at the same layer. Although the device can be used for any wideband application, the developed prototype is designed to operate within the band 2–5 GHz, which is used in microwave‐based head imaging systems. The simulated and experimental results of the developed divider show equal power division with less than 0.5 dB of additional insertion loss, less than 2° of phase imbalance, more than 13 dB of isolation and more than 10 dB of return loss over the band 2.3–4.7 GHz. It has a compact size with an overall dimension of 30 × 30 mm2. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:789–791, 2015
Driving continuous improvement

The quality of improvement depends on the quality of leading and lagging performance indicators. For this reason, several tools, such as process mapping, cause and effect analysis and FMEA, need to be used in an integrated way with performance measurement models, such as balanced scorecard, integrated performance measurement system, performance prism and so on. However, in our experience, this alone is not quite enough due to the amount of effort required to monitor performance indicators at operational levels. The authors find that IT support is key to the successful implementation of performance measurement-driven continuous improvement schemes.
Comparative analysis and study of the dynamic stability of AC/DC systems

The authors present an approach for the dynamic stability analysis of power systems possibly including DC facilities and static VAr equipment. To illustrate a typical application of the computer program described, a system is selected which includes a DC tie interconnecting two large networks, and static compensators which are used to regulate AC voltages. Synchronous generators in the network on the inverter side are dedicated to the interconnection. Regulators to damp oscillations of the dedicated generators are investigated with eigenvalue analysis and Bode plots, which are automatically generated by the program on request. >
Play style classification of the strong mahjong players

Recently, the studies AI on in perfect information games are very much advanced to the extent of competing human top players. In contrast, it is still difficult for AI to seek the best solution of the facing situation in games with imperfect information. This is because with the imperfect information players need to change the way they fight against the other players depending on the strategies of other players. If a method to estimate the enemy strategy is established, it will be possible for AI to set its standards to determine its strategy against other players. Therefore in this study, we took mahjong as an example of complicated games with imperfect information, and by statistically analyzing mahjong play record called “Haihu”, we proposed a new method to classify enemy strategy in mahjong from Haihu.
Team Development Manual

Contents: Part I: Basic Theory: What is a team? What is teamwork? The stages of team development The limitations of teambuilding The role of the team leader Action planning Groundrules for team development Designing teambuilding events. Part II: Diagnosing Teamwork Problems: The 'building blocks' questionnaire. Part III: The Building Blocks of Effective Teamwork: Building block 1 - Balanced roles Building block 2 - Clear objectives and agreed goals Building block 3 - Openness and confrontation Building block 4 - Support and trust Building block 5 - Co-operation and conflict Building block 6 - Sound procedures Building block 7 - Appropriate leadership Building block 8 - Regular review Building block 9 - Individual development Building block 10 - Sound inter-group relations Building block 11 - Good communications The building blocks checklist. Part IV: Selecting Teambuilding Activities. Part V Sources of Further Help.
Remote Condition Monitoring and Diagnosis Technology for Rotating Tower of Continuous Casting Machine

To meet the requirement of condition monitoring and fault diagnosis for the rotating tower of continuous casting machine (RTCCM) in a steel-making plant, the technology of remote monitoring and diagnosis system (RMDS) for RTCCM is developed in the paper. The architecture of the system is presented, and the key techniques in the system implementation are discussed in detail, including the B/S structure, Java technique and Web diagnostic technique. The developed RMDS can implement truly portability and provide a good solution for designing a remote diagnosis system based on network environment. The outcome of locale running indicates that the system possesses complete function with reliable operation and friendly consumer interface.
HnCdTe Charge Transfer Device Focal Planes

Metal-Insulator-Semiconductor (MIS) detectors fabricated in HgCdTe offer significant advantages for focal plane applications. These detectors perform noise free signal intearation directly in the HoCdTe, can be formed in either n- or p-type material, do not require formation of a metallurgical junction, and are easy to interface to low power signal processing integrated circuits in silicon. Furthermore, this device technology readily facilitates the formation of charge transfer devices which perform some signal processing in the HaCdTe prior to transfer of the signal to the silicon processor.
DC-link voltage control strategy for reducing capacitance and total harmonic distortion in single-phase grid-connected photovoltaic inverters

High-volume capacitance is required to buffer the power difference between the input and output ports in single-phase grid-connected photovoltaic inverters, which become an obstacle to high system efficiency and long device lifetime. Furthermore, total harmonic distortion becomes serious when the system runs into low power level. In this study, a comprehensive analysis is introduced for two-stage topology with the consideration of active power, DC-link (DCL) voltage, ripple and capacitance. This study proposed a comprehensive DCL voltage control strategy to minimise the DCL capacitance while maintaining a normal system operation. Furthermore, the proposed control strategy is flexible to be integrated with the pulse-skipping control that significantly improves the power quality at light power conditions. Since the proposed control strategy needs to vary DCL voltage, an active protection scheme is also introduced to prevent any voltage violation across the DCL. The proposed control strategy is evaluated by both simulation and experiments, whose results confirm the system effectiveness.
The Optimal Unit Green Extension — Considering Different Demand Patterns

Actuated signals are able to adjust phase intervals in a real-time manner, in response to the traffic conditions obtained from vehicle detectors. These adjustments are implemented through a set of pre-determined controller parameters, including the unit green extension. This paper develops a model based on cell transmission model (CTM) to optimize the unit green extension, explicitly considering the stochastic demand arrivals, which, from a disaggregated view, imposes significant impact on individual vehicle delay and thus influences the overall system performance. The vehicle actuation logic is mathematically formulated as a system of equalities and inequalities. Genetic algorithm is employed to solve the resulted mixed-integer problem and numerical examples are presented to generate optimal unit green extensions under various demand patterns.
Radiation from coupled multiconductor transmission lines

Based on the reciprocity theorem, a simple method for analysis of the radiated electromagnetic fields from an arbitary configuration of coupled multiconductor transmission lines with linear terminations is presented. The radiation problem is solved using the reciprocity theorem and the solution of the coupling problem. The method of solution for the coupling problem is based on the quasi-TEM assumptions. Some examples for several coupled structures of coupled transmission lines are then solved to show the capabilities of the method.
Outdoor Mobile Robot Navigation System Based on BCI and Dual Laser Radar

A machine intelligence assistant BCI fusion navigation method of an outdoor mobile robot is put forward in view of the problem of BCI’s low signal-to-noise ratio, bad accuracy and long time delay. A vehicle navigation system based on BCI and dual laser radar is designed and implemented. First, improved angle potential field method based on dual laser radar is used for local path planning, then with navigation intention from BCI system, control commands are generated by fusion decision and used for driving a electric vehicle with modified mechanical system. Experiments show that the system can realize intelligent obstacle avoidance and human-machine collaborative navigation based on environmental obstacle information and brain machine interface control intention and it has higher accuracy, fault tolerance and robustness
Extraction of 137Cs from Acidic Feed by Centrifugal Contactors Using a Solution of Calix[4]arene-bis-1,2-benzo-crown-6 in Phenyltrifluoromethyl Sulphone

Abstract Extraction of 137Cs from 1.6 L of diluted aqueous simulated high-level waste (SHLW) (at 1 M HNO3) was carried out using a two-stage centrifugal contactor system (bowl volume 200 mL) into 2 × 10−3 M solution of calix[4]arene-bis-1,2-benzo-crown-6 in phenyltrifluoromethyl sulphone. Batch extraction studies were done to optimize the conditions for the centrifugal contactor runs. Extraction and stripping experiments were carried out at 2000 rotations per minute, keeping the organic and aqueous flow rate at 15 mL/min. Alamine 336 was used at a very low concentration (0.4 vol %) to effect efficient stripping of the extracted radiocesium. The studies were carried out using SHLW as well and the results indicated quantitative extraction and stripping in the first stage of operations while the repeat runs suggested lower extraction as well as stripping efficiencies.
Measuring system for registration of near-field power distribution in modes of planar and strip waveguides

A measuring assembly to examine the distribution of light intensity in near field of planar and strip waveguides was presented. The image of near-field intensity distribution of waveguide modes was showed as well as their interferrential changes caused by the change in optic features of waveguide structure. The presented version of the station was the one to measure the power guided in particular modes with the same polarisation states.