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ردیف | عنوان | نوع |
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1 |
Deployment-Ready Quantum Key Distribution Over a Classical Network Infrastructure in Padua
توزیع کلید کوانتومی آماده استقرار بر روی یک زیرساخت شبکه کلاسیک در پادوآ-2022 Current technological progress is driving Quantum
Key Distribution towards a commercial and worldwide scale
expansion. Its capability to deliver secure communication
regardless of the computational power of the attackers will be a
fundamental feature in the next generations of telecommunication
networks. Nevertheless, demonstrations of QKD implementation in a real operating scenario and their coexistence with the
classical telecom infrastructure are of fundamental importance
for reliable exploitation. Here we present a Quantum Key
Distribution application implemented over a classical fiber-based
infrastructure. We exploit a 50 MHz source at 1550 nm, a single 13
km-long fiber cable for both the quantum and the classical channel,
and a simplified receiver scheme with just one single-photon
detector. In this way, we achieve an error rate of approximately
2% and a secret key rate of about 1.7 kbps, thus demonstrating the
feasibility of low-cost and ready-to-use Quantum Key Distribution
systems compatible with standard classical infrastructure.
Index Terms: Classical channel | cryptography | fiber, FPGA | padua | POGNAC | quantum communication | quantum key distribution | qubit4sync | telecommunication. |
مقاله انگلیسی |
2 |
Equivalence Checking of Quantum Circuits With the ZX-Calculus
بررسی هم ارزی مدارهای کوانتومی با ZX-calculus-2022 As state-of-the-art quantum computers are capable of running increasingly complex algorithms, the need for
automated methods to design and test potential applications
rises. Equivalence checking of quantum circuits is an important,
yet hardly automated, task in the development of the quantum
software stack. Recently, new methods have been proposed that
tackle this problem from widely different perspectives. One of
them is based on the ZX-calculus, a graphical rewriting system
for quantum computing. However, the power and capability of
this equivalence checking method has barely been explored.
The aim of this work is to evaluate the ZX-calculus as a
tool for equivalence checking of quantum circuits. To this end,
it is demonstrated how the ZX-calculus based approach for
equivalence checking can be expanded in order to verify the
results of compilation flows and optimizations on quantum
circuits. It is also shown that the ZX-calculus based method
is not complete—especially for quantum circuits with ancillary
qubits. In order to properly evaluate the proposed method,
we conduct a detailed case study by comparing it to two other
state-of-the-art methods for equivalence checking: one based
on path-sums and another based on decision diagrams. The
proposed methods have been integrated into the publicly available
QCEC tool (https://github.com/cda-tum/qcec) which is
part of the Munich Quantum Toolkit (MQT).
Index Terms: Quantum computing | formal verification | quantum circuit. |
مقاله انگلیسی |
3 |
Evolution of Quantum Computing: Theoretical and Innovation Management Implications for Emerging Quantum Industry
تکامل محاسبات کوانتومی: مفاهیم مدیریت نظری و نوآوری برای صنعت کوانتومی در حال ظهور-2022 Quantum computing is a vital research field in science
and technology. One of the fundamental questions hardly known
is how quantum computing research is developing to support scientific advances and the evolution of path-breaking technologies
for economic, industrial, and social change. This study confronts
the question here by applying methods of computational scientometrics for publication analyses to explain the structure and
evolution of quantum computing research and technologies over
a 30-year period. Results reveal that the evolution of quantum
computing from 1990 to 2020 has a considerable average increase of
connectivity in the network (growth of degree centrality measure),
a moderate increase of the average influence of nodes on the flow
between nodes (little growth of betweenness centrality measure),
and a little reduction of the easiest access of each node to all other
nodes (closeness centrality measure). This evolutionary dynamics
is due to the increase in size and complexity of the network in
quantum computing research over time. This study also suggests
that the network of quantum computing has a transition from
hardware to software research that supports accelerated evolution
of technological pathways in quantum image processing, quantum
machine learning, and quantum sensors. Theoretical implications
of this study show the morphological evolution of the network in
quantum computing from a symmetric to an asymmetric shape
driven by new inter-related research fields and emerging technological trajectories. Findings here suggest best practices of innovation
management based on R&D investments in new technological directions of quantum computing having a high potential for growth
and impact in science and markets.
Index Terms: Innovation management | quantum algorithms | quantum computing (QC) | quantum network | technological change | technological paradigm | technological trajectories. |
مقاله انگلیسی |
4 |
GAFL: Global adaptive filtering layer for computer vision
GAFL: لایه فیلتر تطبیقی جهانی برای بینایی کامپیوتر-2022 We devise a universal global adaptive filtering layer, GAFL, capable of ‘‘learning’’ optimal frequency filter for
each image in a dataset together with the weights of the base neural network that performs some computer
vision task. The proposed approach takes the source image in the spatial domain, selects the best frequencies
in the Fourier domain for the benefit of the global task, and prepends the inverse-transform image to the
main neural network for a joint training. Remarkably, such a simple add-on layer, capable of optimizing the
frequency content of an input for a specific task, dramatically improves the performance of the main network
regardless of its design. We observe that the light networks gain a noticeable boost in the performance metrics;
whereas, the training of the heavy ones converges faster when GAFL is prepended to the main architecture.
We showcase the performance of the layer in four classical computer vision tasks: classification, segmentation,
denoising, and erasing, considering popular natural and medical data benchmarks.
keywords: Adaptive neural layer | Efficient training | Fourier filtering |
مقاله انگلیسی |
5 |
Natural Embedding of the Stokes Parameters of Polarimetric Synthetic Aperture Radar Images in a Gate-Based Quantum Computer
جاسازی طبیعی پارامترهای استوکس تصاویر رادار دیافراگم مصنوعی قطبی در یک کامپیوتر کوانتومی مبتنی بر گیت-2022 Quantum algorithms are designed to process quantum data (quantum bits) in a gate-based quantum computer. They
are proven rigorously that they reveal quantum advantages over
conventional algorithms when their inputs are certain quantum
data or some classical data mapped to quantum data. However,
in a practical domain, data are classical in nature, and they are
very big in dimension, size, and so on. Hence, there is a challenge
to map (embed) classical data to quantum data, and even no
quantum advantages of quantum algorithms are demonstrated
over conventional ones when one processes the mapped classical
data in a gate-based quantum computer. For the practical domain
of earth observation (EO), due to the different sensors on remotesensing platforms, we can map directly some types of EO data
to quantum data. In particular, we have polarimetric synthetic
aperture radar (PolSAR) images characterized by polarized
beams. A polarized state of the polarized beam and a quantum
bit are the Doppelganger of a physical state. We map them to
each other, and we name this direct mapping a natural embedding,
otherwise an artificial embedding. Furthermore, we process our
naturally embedded data in a gate-based quantum computer by
using a quantum algorithm regardless of its quantum advantages
over conventional techniques; namely, we use the QML network
as a quantum algorithm to prove that we naturally embedded
our data in input qubits of a gate-based quantum computer.
Therefore, we employed and directly processed PolSAR images
in a QML network. Furthermore, we designed and provided a
QML network with an additional layer of a neural network,
namely, a hybrid quantum-classical network, and demonstrate
how to program (via optimization and backpropagation) this
hybrid quantum-classical network when employing and processing PolSAR images. In this work, we used a gate-based quantum
computer offered by an IBM Quantum and a classical simulator
for a gate-based quantum computer. Our contribution is that
we provided very specific EO data with a natural embedding
feature, the Doppelganger of quantum bits, and processed them
in a hybrid quantum-classical network. More importantly, in the
future, these PolSAR data can be processed by future quantum
algorithms and future quantum computing platforms to obtain
(or demonstrate) some quantum advantages over conventional
techniques for EO problems.
Index Terms: Natural embedding | parameterized quantum circuit | polarimetric synthetic aperture radar (PolSAR) | quantum machine learning (QML). |
مقاله انگلیسی |
6 |
Abundant traveling wave solutions to an intrinsic fractional discrete nonlinear electrical transmission line
Abundant traveling wave solutions to an intrinsic fractional discrete nonlinear electrical transmission line-2021 The main idea of this paper is to search for all traveling wave solutions to an intrinsic fractional discrete
nonlinear electrical transmission line, which plays a essential role in obtaining the new insights in nonlinear
voltage dynamics. We first give a brief introduction how to transform the discrete system into a continuous
one, which is described by a fractional-order partial differential equation. After that, this equation is handled
by conformable fractional transformation and the complete discrimination system for polynomial method
(CDSPM). By applying the advanced method, the whole of the exact traveling wave solutions emerged in
existing articles are obtained, especially we obtain the solitary wave solutions and elliptic functions solutions
which are hardly founded by other methods. Notably, the elliptic functions solutions in rational form are
discovered for the first time. Finally, the electrical characteristics and the fractional nature are revealed
via graphical represents. By the depicted graphs, we intuitively observe the existence of the phenomena for
periodic wave and solitary wave, and the time-fractional derivative is proved do has important influence on
the behaviors of the solutions. Considering the significance of the nonlinear electrical transmission line, the
acquired results would have wide application in electrical engineering and nonlinear voltage dynamics, liking
analyzing and predicting the complex voltage wave propagation phenomenon in realistic electrical transmission
system.
Keywords: Electrical transmission line | Traveling wave solutions | Conformable fractional transformation | The complete discrimination system for polynomial method |
مقاله انگلیسی |
7 |
Accounts of NGO performance as calculative spaces: Wild Animals, wildlife restoration and strategic agency
حساب های عملکرد سازمان های غیر دولتی به عنوان فضاهای محاسباتی: حیوانات وحشی، ترمیم حیات وحش و آژانس استراتژیک-2021 Whereas corporations typically share a common primary objective of generating profits for their
owners, non-governmental organisations (NGOs) principally pursue a panoply of various social
and/or ecological objectives. Accordingly, an NGO’s performance in pursuit of its objectives can
rarely be accounted for in straightforwardly comparable quantitative terms. How then can an
NGO instead construct qualitative accounts of its performance that show how it makes a differ-
ence in pursuit of its objectives? This paper examines qualitative accounts of performance against
an objective to restore wildlife, which are included in the annual reports of a large conservation
NGO. These accounts are conceptualised as being calculative spaces, configured by framing work
being done within these accounts. Analysis of this framing work finds that these accounts identify
a performance object (i.e. specific wild animal populations), establish relations that seemingly
affect this performance object (i.e. threats to wild animal populations and actions to conserve
these populations), and attribute the NGO with agency to make a difference to this performance
object (i.e. as a strategic actor directing and co-ordinating wildlife restoration). Thus, this paper
demonstrates that seeing quantitative and qualitative accounts of organisational performance in
the same conceptual terms creates conditions of possibility for developing a fuller understanding
of an organisation’s calculations of its own capacity to act upon society. keywords: سازمان غیر دولتی | مسئوليت | کادر بندی | محاسبات | گفتمان | حفاظت | NGO | Accountability | Framing | Calculation | Discourse | Conservation |
مقاله انگلیسی |
8 |
On the link between current account and fiscal imbalances in the presence of structural breaks: Empirical evidence from Egypt
در ارتباط بین حساب جاری و عدم تعادل مالی در حضور شکاف های ساختاری: شواهد تجربی از مصر-2021 This study provides an empirical analysis for Egypt of the link between fiscal and current account imbalances, which is also known in the literature as the twin deficit hypothesis. We assess the link between the
two deficits in the presence of structural breaks using the Autoregressive Distributed Lag (ARDL) model
and the bootstrap causality test. Our empirical results suggest that we reject the twin deficit hypothesis
over the long-run. Instead, we find support for the Ricardian equivalence hypothesis. The absence of any
long-run relationship between the two variables is backed by our bootstrap causality test and our FM-OLS
(Fully Modified Ordinary Least Squares) regression results. Still, we find support for the existence of a
link between the two deficits in the short-run. The results from the ARDL model with breaks contrast
with those in earlier studies without breaks. The latter rejected both the twin deficit and the Ricardian
equivalence hypotheses.
keywords: عدم تعادل بودجه | عدم تعادل حساب جاری | فرضیه دوقلو | همبستگی ریکاردی | شکاف ساختاری | مصر | Budget imbalance | Current account imbalance | Twin-deficit hypothesis | Ricardian equivalence | ARDL | Structural breaks | Egypt |
مقاله انگلیسی |
9 |
Technical-knowledge-integrated material flow cost accounting model for energy reduction in industrial wastewater treatment
مدل حسابداری مواد مخدر فنی دانش فنی برای کاهش انرژی در درمان فاضلاب صنعتی-2021 A novel simulation model incorporating the concept of material flow cost accounting (MFCA) into a numerical
process simulator for wastewater treatment plants (WWTPs) was developed. Cost-related parameters, such as
electrical power consumption, were calculated for each unit process by referring to predetermined formulas of
design rules and technical knowledge built into the model. These calculated values were then assigned to the
outflow stream proportional to the flowrate, allowing each flow stream in the WWTP to be quantified according to
the history of assigned costs. This method increased the number of quantity centers in MFCA models regardless of
actual data availability, thus contributing complex flow configuration and flexible comparison of improvement
approaches related to financial evaluation. Energy cost allocation maps created by this model demonstrated the
benefits of anaerobic treatment in the WWTP of a soft-drink factory in Japan. Additionally in this WWTP, the
observed values of total power consumption were 40% higher than the simulated values, and improvement approaches, such as instrumental control of aeration, were evaluated for their feasibility and financial impact. These
results demonstrated the success of the model in adding and reinforcing analytical and predictive functions in the
MFCA survey method.
Keywords: Material flow cost accounting | Process simulation model | Industrial wastewater | Energy saving | Food and beverage industry |
مقاله انگلیسی |
10 |
Influence of workforce agility on crisis management: Role of job characteristics and higher administrative support in public administration
تأثیر چابک نیروی کار بر مدیریت بحران: نقش ویژگی های شغلی و حمایت اداری بالاتر در مدیریت عمومی-2021 Crisis Management is a critical and challenging function across various forms of government. Crisis situations hardly give much time to the individuals and organizations for preparation. Accordingly, it is more
likely that an agile workforce will better manage crisis in government organizations. This study explores
the influence of workforce agility, on crisis management by government departments and examines the
probable role of higher administrative support, and job characteristics over crisis management. Data were
collected through a questionnaire survey from 263 government administrative officers of Odisha, India.
Structural Equation Modelling was used to analyse the data with the help of AMOS. The results indicate
that workforce agility, higher administrative support, and enriched job characteristics contribute towards
better crisis management. Furthermore, higher administrative support, and enriched job characteristics
were found to be antecedents of workforce agility and influence crisis management through the mediator
workforce agility. The findings of this study will be helpful for government agencies and departments in
creating an agile workforce for effective management of crisis.
keywords: مدیریت بحران | چابکی نیروی کار | پشتیبانی اداری بالاتر | ویژگی های شغلی | Crisis Management | Workforce Agility | Higher Administrative Support | Job Characteristics |
مقاله انگلیسی |