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نتیجه جستجو - consistency

تعداد مقالات یافته شده: 151
ردیف عنوان نوع
1 Quantum-Enhanced Deep Learning-Based Lithology Interpretation From Well Logs
تفسیر لیتولوژی مبتنی بر یادگیری عمیق کوانتومی از Well Logs-2022
Lithology interpretation is important for understanding subsurface properties. Yet, the common manual well log interpretation is usually with low efficiency and bad consistency. Therefore, the automatic well log interpretation tools based on machine learning and deep learning have been developed. Although the state-of-the-art sophisticated models can show fine interpretation performance with acceptable accuracies, “blind” tests do not always exhibit satisfactory results because of the complexity of lithology interpretation with respect to subsurface rock properties and the data-labeling quality. To solve this generalization challenge, we propose to leverage the parameterized quantum circuits in the deep-learning model. The quantum computing takes advantages of the superposition and entanglement quantum systems, which could potentially endow the generalization power or capability to the deep-learning model. Using the proposed quantum-enhanced deep-learning (QEDL) model, we have tested the model performance on field well log data from different wells. Compared with the classic fine convolutional neural network (CNN) model and the long short-term memory (LSTM) model, the proposed QEDL model achieves comparable model performance with a clearly improved generalization power for interpreting both thin and thick lithology layers. In addition, because of the quantum circuit structure, the QEDL model needs much fewer model parameters than LSTM and CNN models, i.e., the QEDL parameter number in our study can be approximately 75% less than that of LSTM and 89% less than that of CNN.
keywords: Deep learning | lithology interpretation | quantum computing.
مقاله انگلیسی
2 A survey of blockchain-based IoT eHealthcare: Applications, research issues, and challenges
بررسی مراقبت های بهداشتی الکترونیک اینترنت اشیاء مبتنی بر بلاک چین: برنامه های کاربردی، مسائل تحقیقاتی و چالش ها-2022
Blockchain (BC) technology has recently emerged as an essential component for different applications, including healthcare and IoT, because of its decentralized ledger, source provenance, and tamper-proof nature. The Internet of Things (IoT) and BC have enabled health systems to expand their scalability and maintain consistency on a decentralized platform. As a result, many researchers have developed BC-enabled IoT eHealth systems and explored the application of BC technology in diverse fields of eHealthcare. This paper conducts a comprehensive survey on the emerging applications of BC technology in healthcare. We summarize applications, research issues, security threats, research challenges, opportunities, and the future scope of BC technologies in the IoT-enabled healthcare system when BC is adopted to handle the privacy and storage of current and future medical records. Furthermore, we analyze the state-of-the-art BC works in the medical area, assessing their benefits-drawbacks, and guiding future researchers to overcome the limitations of the existing articles.
Keywords: Blockchain | IoT | Healthcare | EHR challenge | Medical area
مقاله انگلیسی
3 Ann trained and WOA optimized feature-level fusion of iris and fingerprint
بهینه سازی شبکه‌های عصبی مصنوعی و WOA آموزش دیده همجوشی در سطح ویژگی عنبیه و اثر انگشت-2021
‘‘Uni Uni-modal Biometric systems has been widely implemented for maintaining security and privacy in various applications like mobile phones, banking apps, airport access control, laptop login etc. Due to Advancement in technologies, imposters designed various ways to breach the security and most of the designed biometric applications security can be compromised. The quality of input sample also play an important role to attain the best performance in terms of improved accuracy and reduced FAR & FRR. Researchers has combined the various biometrics modalities to overcome the problems of Uni-modal bio- metrics. In this paper, a multi biometric feature level fusion system of Iris, and Fingerprint is presented. Due to consistency feature of fingerprint and stability feature of iris modality taken into consideration for high security applications. At pre-processing level, the atmospheric light adjustment algorithm is applied to improve the quality of input samples (Iris and Fingerprint). For feature extraction, the nearest neighbor algorithm and speedup robust feature (SURF) is applied to fingerprint and Iris data respectively. Further, for selecting the best features, the extracted features are optimized by GA algorithm. To achieve an excellent recognition rate, the iris and fingerprint data is trained by ANN algorithm. The experimental results show that the proposed system exhibits the improved performance and better security. Finally, the template is secured by applying the AES algorithm and results are compared with DES, 3DES, RSA and RC4 algorithm.© 2021 Elsevier Ltd. All rights reserved. Selection and peer-review under responsibility of the scientific committee of the 1st International Con- ference on Computations in Materials and Applied Engineering – 2021.
Keywords: Multimodal biometrics fusion | ANN | SURF | GA | RSA
مقاله انگلیسی
4 ConTrib: Maintaining fairness in decentralized big tech alternatives by accounting work
ConTrib: حفظ انصاف در جایگزین های غیرمتمرکز فناوری بزرگ با کار حسابداری-2021
‘‘Big Tech’’ companies provide digital services used by billions of people. Recent developments, however, have shown that these companies often abuse their unprecedented market dominance for selfish interests. Meanwhile, decentralized applications without central authority are gaining traction. Decentralized applications critically depend on its users working together. Ensuring that users do not consume too many resources without reciprocating is a crucial requirement for the sustainability of such applications. We present ConTrib, a universal mechanism to maintain fairness in decentralized applications by accounting the work performed by peers. In ConTrib, participants maintain a personal ledger with tamper-evident records. A record describes some work performed by a peer and links to other records. Fraud in ConTrib occurs when a peer illegitimately modifies one of the records in its personal ledger. This is detected through the continuous exchange of random records between peers and by verifying the consistency of incoming records against known ones. Our simple fraud detection algorithm is highly scalable, tolerates significant packet loss, and exhibits relatively low fraud detection times. We experimentally show that fraud is detected within seconds and with low bandwidth requirements. To demonstrate the applicability of our work, we deploy ConTrib in the Tribler file-sharing application and successfully address free-riding behaviour. This two-year trial has resulted in over 160 million records, created by more than 94’000 users.
keywords: عادلانه بودن | برنامه های کاربردی غیر متمرکز | حسابداری | رایگان RiderPrevention | Fairness | Decentralizedapplications | Accountingmechanism | Free-riderprevention
مقاله انگلیسی
5 A disease transmission inspired closed-loop supply chain dynamic model for product collection
یک مدل پویا از زنجیره تامین حلقه بسته از طریق انتقال بیماری برای جمع آوری محصول-2021
This paper studies the reverse channel in dynamic closed-loop supply chain (CLSC) system which consists of manufacturers and retailers. Based on the dynamic CLSC model, we research the decisions and profits of CLSC members in different reverse channels that consider the quantitative characteristic of products. The results show that the optimal collection decisions for the given quantitative characteristic of products are diverse in different development levels of CLSC. Furthermore, we propose a transfer payment coordination mechanism based on Nash bargaining model to address the objective inconsistency between CLSC and its members. Moreover, we carry out the case study using the statistical data of Chinese new energy vehicles (NEVs). We show the robustness of results through the sensitivity analysis and offer some suggestions for the government and NEV managers in China.
Keywords: Supply chain management | Closed-loop supply chain | Dynamic model | Reverse channel | Coordination mechanism
مقاله انگلیسی
6 American Society of Biomechanics Early Career Achievement Award 2020: Toward Portable and Modular Biomechanics Labs: How Video and IMU Fusion Will Change Gait Analysis
انجمن آمریکایی بیومکانیک جایزه دستاورد اولیه شغلی 2020: به سوی آزمایشگاههای بیومکانیک قابل حمل و مدولار: چگونه تجزیه ویدئو و IMU تجزیه و تحلیل راه رفتن را تغییر می دهد-2021
The field of biomechanics is at a turning point, with marker-based motion capture set to be replaced by portable and inexpensive hardware, rapidly improving markerless tracking algorithms, and open datasets that will turn these new technologies into field-wide team projects. Despite progress, several challenges inhibit both inertial and vision-based motion tracking from reaching the high accuracies that many biomechanics applications require. Their complementary strengths, however, could be harnessed toward better solutions than those offered by either modality alone. The drift from inertial measurement units (IMUs) could be corrected by video data, while occlusions in videos could be corrected by inertial data. To expedite progress in this direction, we have collected the CMU Panoptic Dataset 2.0, which contains 86 subjects captured with 140 VGA cameras, 31 HD cameras, and 15 IMUs, performing on average 6.5 minutes of activities, including range of motion activities and tasks of daily living. To estimate ground-truth kinematics, we imposed simultaneous consistency with the video and IMU data. Threedimensional joint centers were first computed by geometrically triangulating proposals from a convolutional neural network applied to each video independently. A statistical meshed model parametrized in terms of body shape and pose was then fit through a top-down optimization approach that enforced consistency with both the video-based joint centers and IMU data. This sensor-dense dataset can be used to benchmark new methods that integrate a much sparser set of videos and IMUs to estimate both kinematics and kinetics in a markerless fashion.
Key words: markerless motion tracking | computer vision | inertial measurement units
مقاله انگلیسی
7 Matching user accounts with spatio-temporal awareness across social networks
تطبیق حساب های کاربری با آگاهی مکانی-زمانی در سراسر شبکه های اجتماعی-2021
User identification aims at matching user accounts across social sites, which benefits many real-world applications. Existing works based on user trajectories usually address spatial and temporal data separately while not fully utilizing the coupling relation between them. Differently, in this work, we jointly consider spatialtemporal information in users’ acitvities to improve the user identification method. In particular, we observe that check-in records of different users tend to create inconsistent spatialtemporal information. These inconsistencies are useful for eliminating false user matching. Inspired by this observation, we propose a novel user identification method that captures the correlation of spatial and temporal information and the inconsistency in check-in records. It contains three main steps. 1) We measure the similarity of users’ trajectories based on a kernel density estimation, which considers spatial and temporal information simultaneously. 2) We assign a weight to each check-in record to favor discriminative ones. 3) We utilize the inconsistency among check-in records to compute penalties for trajectory similarity. The pair of accounts with higher similarity (than a predefined threshold) is then considered to be from the same user. We evaluate our approach on three ground-truth datasets. The results show that the proposed method offers competitive performance, with F1 values reaching 86.12%, 85.08% and 78.34%, which demonstrates the superiority of the proposed method over state-of-theart methods.
keywords: شناسه کاربر | آگاهی مکانی-زمانی | مطابقت با حساب های کاربری | داده های ورود | مسیر کاربر | User identification | Spatio-temporal awareness | Match user accounts | Check-in data | User trajectory
مقاله انگلیسی
8 Can we trust Einstein’s accounts of the genesis of special relativity?
آیا می‌توانیم به گزارش‌های انیشتین درباره پیدایش نسبیت خاص اعتماد کنیم؟-2021
There are three kinds of sources available to reconstruct the reflections that led Einstein to special relativity: a few contemporary letters and documents, his impersonal accounts of the genesis of this theory, and recollections of his own path. At first glance, contradictions within and between these sources hamper the reliability of Einstein’s accounts. Yet, a closer analysis reveals much more consistency than foreseen and helps eliminate the dubious, contradictory elements. It then becomes possible to combine the three kinds of sources to produce a minimally speculative and yet fairly coherent account of the genesis of special relativity.
keywords: انیشتین | نسبیت خاص | خاطرات | بازسازی | Einstein | Special relativity | Recollections | Reconstruction
مقاله انگلیسی
9 The role of management accounting systems in global value strategies
نقش سیستم های حسابداری مدیریت در استراتژی های ارزش جهانی-2021
In this paper, we explore the relationship and interdependencies of firms’ positions in global markets, innova- tion, foci on value creation or value development strategies and their intensity of use and system design of management accounting (MA) tools. We collect data through a survey of the 500 largest Portuguese firms. The results show multiple interdependencies of MA intensity of use and system design and global positioning as well as the value foci of firms. Global market positioning, as well as MA intensity, is directly associated with inno- vation. The multiple configurations also show that the value strategy focus (creating new products or solely developing them for different markets) changes the nature of the MA system put in place by firms. Consequently, we contribute to the discussion of MA systems vs MA packages by specifically addressing the fit and internal consistency of those tools. Methodologically, the results are robust to different analytical tools - multivariate regression, fuzzy-set qualitative comparative analysis (fsQCA) and factor analysis.
keywords: سیستم های حسابداری مدیریت | ارزشآفرینی | بازارهای جهانی | fsqca | Management accounting systems | Value creation | Global markets | fsQCA
مقاله انگلیسی
10 Networks of interpretation: An ethnography of the quest for IFRS consistency in a global accounting firm
شبکه های تفسیر: قوم نگاری تلاش برای سازگاری IFRS در یک شرکت حسابداری جهانی-2021
Because of their complexity and principle-based nature, the creation of International Financial Reporting Standards (IFRS) engendered significant uncertainty that modified the order of things within large accounting firms. This motivated them to establish Professional Practice Function (PPF) units to try to ensure a credible degree of consistency in applying IFRS across a wide range of financial reports at the international level. We study backstage dynamics surrounding a PPF national unit in one of the Big Four firms. We focus on the rise of the PPF as an expert-based control device within the firm, and the role PPF members play as knowledge brokers to interpret IFRS. Our investigation is carried out through ethnographic fieldwork supplemented by interviews with PPF members and field auditors. The analysis brings forward some of the organizational dynamics surrounding PPF members efforts to establish their credibility as intermediaries both hierarchically, between administrative partners and field auditors, and epistemically, between the unifying logic of IFRS and auditees financial reporting specifics. Ultimately, our analysis points to the role of the PPF as a gatekeeping or internal control device that mediates between different pools of knowledge to monitor the firms reputation risk against IFRS implementation challenges. From a legal perspective, our ethnography documents how accounting “law” is made at the firm level and how PPF members strive for consistency e in spite of significant epistemological and organizational challenges. Our ethnography also shows that complex IFRS interpretation issues are not resolved through one persons judgment; instead, the firms structure surrounding the PPF allows for the constitution of inter-individual judgment that transcends national, sectoral, and (sometimes) organizational boundaries. Finally, we see one important contribution of our work as helping reveal the limits of large conceptual categories such as “auditors”, which tend to downplay the dynamics of convoluted practice relationships.
keywords: بزرگ چهار | تجربه و تخصص | اجرای IFRS | خدمات حرفه ای | حسابرسی | کنترل کیفیت | قضاوت | Big four | Expertise | IFRS implementation | Professional service firm | Audit firm | Quality control | Structure-judgment
مقاله انگلیسی
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