nils-herrmann/clean_scirepeval huggingface dataset:
Effects of structural parameters on crack heating based on finite elements modeling

The sonic infrared imaging technology is a new nondestructive detection technology combining ultrasonic excitation and infrared imaging which can detect the defects of structure. In this paper, a ferruginous plate is considered as the research object to open out mechanism of crack heating in this technology. A finite element model based on the transducer and plate is established, heating characteristics in the crack are studied here under different excitation time and different structural parameters, such as crack shape and location. Research results show that temperature in the crack area increase with the excitation time, but increasing rate becomes more and more small. And the influence of crack shape on crack heating presenting a monotonous function situation, while heating of cracks at different location demonstrates a phenomenon of rise and fall. The research of structural parameters on crack heating will establish the theory basis for mechanism research on crack heating in the sonic infrared imaging technology.
Consignment Stock Policy with Defective Items

CS (consignment stock) policy is a kind of joint vendor and buyer policy to the management of inventories in supply chains. In this paper, we develop production-inventory system models of consignment stock to determine optimal integrated vendor buyer inventory policy, taking into account the views of single-buyer and single-vendor based on Hill's (1997) model and Braglia and Zavanella's (2003) models. We consider of defective items' cost and cost of stock as part of the vendor's costs. The objective is to minimize the total joint annual costs incurred by the vendor and the buyer. Delayed deliveries are permitted. The average costs over time are to be minimized. The decisions to take are the delivered amount, the number of transport operations per production batch, the quantity transported per delivery and delayed deliveries. In order to study the policy under uncertain demand, a basic model of consignment stock and a delayed deliveries model are presented, and then the stochastic demand model is given under variable lead-time. For practical purpose, the delivery quantity to the buyer is supposed to be identical at each replenishment. The expected annual integrated total cost function is derived and a solution procedure is established to find out the optimal solution. Finally, the solution technique is illustrated with a numerical example for each model. The novelty of the paper is that defective item costs are included in the CS models and optimal formula is developed under uncertain demand and variable lead-time. Managers can easily apply these models to practice
Joint margin-adaptive allocation scheme for bandwidth and power with GBR in cooperative networks

This paper studies the problem of joint allocation of transmission power and bandwidth in cooperative networks. The goal is to minimize transmission energy consumption in a network with M coordinated transmission points (CTPs) under respective data rate constraints of N mobile terminals (MTs). We propose a joint power and bandwidth allocation scheme for downlink data transmission based on mathematical derivation, in which each MT should access up to two CTPs at the same time to obtain optimal allocation. The derivation leads to a universal modification to existing allocation algorithms reducing complexity from O(f(M;N)) to O(f(2;N)). It is then proved that when the available bandwidth is less than a certain value associated with channel status, coordinated data transmission is infeasible, i.e. the complexity can be further reduced to O(f(1;N)). Based on this scheme a simplified resource allocation algorithm is designed. Numerical results verify the validity and efficiency of proposed scheme in reducing energy consumption and complexity. The proposed scheme is feasible in homogeneous and heterogeneous cooperative networks for emerging green communications.
Circuit model and power distribution model of wireless power transfer system in air

Based on the mutual inductance model, this paper introduces two controlled voltage source from the point of electromagnetic field. The mutual inductance voltage of primary coil is the integrating of the electric field intensity which is generated by current in the secondary coil along the primary coil path, and vice versa. In order to optimize the parameters of wireless power system, the power distribution model is proposed according to the power transmission. The input power is consumed by three parts: the power lost in the primary coil resistance, the power lost in the secondary coil resistance, and the power consumed by load. The experimental results verify the power distribution model.
The analysis for system-on chip application on Full Authority Digital Engine Control system

This paper aims at understanding and analyzing the effects of system-on chip technology on FADEC (Full Authority Digital Engine Control) system. Now FADEC system involves three problems besides basic performances: life-cycle cost reduction, weight reduction and flexibility of system realization. The life-cycle cost is stemmed mainly from avionics obsolescence, system maintenance, advancing performances and system structure. With respect to weight reduction, we take FADEC system structure and realization of every element into account. The flexibility idea comes from OSA (Open System Architecture) and modularization. In view of these three problems, we introduce system-on chip technology and present its advantages. On the other hand, we utilize FPGA (Field Programmable Gate Array), one of media of system-on chip technology realization, to show its challenges. Finally, we have a conclusion that system-on chip can undertake the tasks of FADEC system despite some challenges.
The microwave noise characteristics of InAlN/GaN HEMTs

The microwave noise characteristics of InAlN/GaN heterojunction HEMTs are analysed by using an equivalent circuit model in this paper. It shows that the minimum noise figure of InAlN/GaN HEMTs can be comparable with that of AlGaN/GaN HEMTs at X-band and higher frequency band. However, at the lower microwave frequency band, the minimum noise figure of InAlN/GaN HEMTs is a little worse, the reason of which is because of its high gate-leakage current. At last, three proposals are provided to improve the noise characteristics of InAlN/GaN HEMTs.
Layout-driven RTL binding techniques for high-level synthesis

The importance of effective and efficient accounting of layout effects is well-established in high-level synthesis (HLS), since it allows more realistic exploration of the design space and the generation of solutions with predictable metrics. This feature is highly desirable in order to avoid unnecessary iterations through the design process. In this paper, we address the problem of layout-driven register-transfer-level (RTL) binding as this step has a direct relevance on the final performance of the design. By producing not only an RTL design but also an approximate physical topology of the chip level implementation, we ensure that the solution will perform at the predicted metric once implemented, thus avoiding unnecessary delays in the design process.
A Joint Framework for QoS and QoE for Video Transmission over Wireless Multimedia Sensor Networks

With the emergence of Wireless Multimedia Sensor Networks (WMSNs), the distribution of multimedia contents have now become a reality. Without proper management, the transmission of multimedia data over WMSNs affects the performance of networks due to excessive packet-drop. The existing studies on Quality of Service (QoS) mostly deal with simple Wireless Sensor Networks (WSNs) and as such do not account for an increasing number of sensor nodes and an increasing volume of data. In this paper, we propose a novel framework to support QoS in WMSNs along with a light-weight Error Concealment (EC) scheme. The EC schemes play a vital role to enhance Quality of Experience (QoE) by maintaining an acceptable quality at the receiving ends. The main objectives of the proposed framework are to maximize the network throughput and to cover-up the effects produced by dropped video packets. To control the data-rate, Scalable High efficiency Video Coding (SHVC) is applied at multimedia sensor nodes with variable Quantization Parameters (QPs). Multi-path routing is exploited to support real-time video transmission. Experimental results show that the proposed framework can efficiently adjust large volumes of video data under certain network distortions and can effectively conceal lost video frames by producing better objective measurements.
A Compact Parylene-Coated WLAN Flexible Antenna for Implantable Electronics

This letter presents a compact planar flexible antenna designed for wireless local area network (WLAN) using simple microfabrication techniques that are compatible with existing state-of-the-art flexible electronic devices. The antenna is fully insulated with biocompatible Parylene C film, which shows a cost-effective and highly feasible approach to making flexible antennas for implantable applications. Coating of ultrathin Parylene C film has shown negligible effects on the return loss and the radiation patterns of the antennas. The characteristics of the proposed antenna have also shown negligible change under different bending conditions. The original WLAN antenna working in air was successfully tuned to operate under implanted condition at 2.4 GHz by tuning the length of the radiator. The measured results showed that the tuned implantable antenna is suitable for integration with flexible and implantable electronics.
Waveguide to microstrip transitions in W-band with LTCC technology

In this paper, two broadband rectangular waveguide to microstrip transitions at W-band with LTCC (Low Temperature Co-fired Ceramic) technology are proposed: WLWMT(WR-10 to LTCC Waveguide to Microstrip Transition), and a novel probe transition of WR-10 to Microstrip using LTCC technology. To widen the bandwidth of WLWMT, two matching structures which are composed of stripline on different substrate layers connected by the staggered via side walls are buried. For the novel probe transition, inner conducting ground is used as waveguide backshort comparing with that in HIMCs(Hybrid Integrated Microwave Circuits). According to EM simulation, the WLWMT illustrates a 19% effective bandwidth (ranging from 91.6 to 98.2 GHz); the probe transition illustrates a 29% effective bandwidth (ranging from 90 to 100 GHz).
DeepEnhancer: Predicting enhancers by convolutional neural networks

Enhancers are crucial to the understanding of mechanisms underlying gene transcriptional regulation. Although having been successfully applied in such projects as ENCODE and Roadmap to generate landscape of enhancers in human cell lines, high-throughput biological experimental techniques are still costly and time consuming for even larger scale identification of enhancers across a variety of tissues under different disease status, making computational identification of enhancers indispensable. In this paper, we propose a computational framework, named DeepEnhancer, to classify enhancers from background genomic sequences. We construct convolutional neural networks of various architectures and compare the classification performance with traditional sequence-based classifiers. We first train the deep learning model on the FANTOM5 permissive enhancer dataset, and then fine-tune the model on ENCODE cell type-specific enhancer datasets by adopting the transfer learning strategy. Experimental results demonstrate that DeepEnhancer has superior efficiency and effectiveness in classification tasks, and the use of max-pooling and batch normalization is beneficial to higher accuracy. To make our approach more understandable, we propose a strategy to visualize the convolutional kernels as sequence logos and compare them against the JASPAR database using TOMTOM. In summary, DeepEnhancer allows researchers to train highly accurate deep models and will be broadly applicable in computational biology.
Runtime Administration of an RBAC Profile for XACML

The eXtensible Access Control Markup Language (XACML) is the de facto language to specify access control policies for web services. XACML has an RBAC profile (XACML-RBAC) to support role-based access control policies. We extend this profile with an administrative RBAC profile, which we refer to as the XACML-ARBAC profile. One of the advantages of doing so is to use policies based on RBAC model to administrate XACML-RBAC policies. Because using permissions granted by XACML-ARBAC policies alter XACML-RBAC policies, enforcing XACML-ARBAC polices requires some concurrency control within XACML access controller's runtime. In order to solve this concurrency problem, we propose a session-aware administrative model for RBAC, and enhance the XACML policy evaluation runtime using a locking mechanism. Experimental study shows reconcilable performance characteristics of our enhancements to Sun's XACML reference implementation.
A fusion scheme of visual and auditory modalities for event detection in sports video

We propose an effective fusion scheme of visual and auditory modalities to detect events in sports video. The proposed scheme is built upon semantic shot classification, where we classify video shots into several major or interesting classes, each of which has clear semantic meanings. Among major shot classes we perform classification of the different auditory signal segments (i.e. silence, hitting ball, applause, commentator speech) with the goal of detecting events with strong semantic meaning. For instance, for tennis video, we have identified five interesting events: serve, reserve, ace, return, and score. Since we have developed a unified framework for semantic shot classification in sports videos and a set of audio mid-level representation with supervised learning methods, the proposed fusion scheme can be easily adapted to a new sports game. We are extending this fusion scheme to three additional typical sports videos: basketball, volleyball and soccer. Correctly detected sports video events will greatly facilitate further structural and temporal analysis, such as sports video skimming, table of content, etc.
Numerical calculation of extremely large reflector antenna using high-performance parallel MLFMA

The extremely large parabolic reflector of the 500-m aperture spherical telescope (FAST) is calculated. As the largest single dish in the world, the FAST reflector is a spherical cap with a radius of 300 m and an aperture diameter of 500 m. In order to accurately calculate the FAST antenna model, the parallel multilevel fast multipole algorithm (MLFMA) is used, in combination with the improved sparse approximate inverse (SAI) preconditioner algorithm. Fast far-field calculation method based on upward pass of the MLFMA is used to accelerate the code efficiency. Result shows the efficiency for antenna gain is improved several thousand times. To verify the calculation, simulations using commercial software ANSYS FEKO were carried out, and good agreement between calculation and simulation is obtained.
A robust small-signal equivalent circuit model for AlGaN/GaN HEMTs up to 110 GHz

In this paper we present an accurate and robust small-signal equivalent circuit model(SSECM) for GaN/AlGaN HEMTs. To extend the operating frequency, a flexible equivalent circuit network for parasitic parameters is proposed. The equivalent circuit network is constructed by a number of (N) seriate equivalent resist, inductance and capacitance (Rn-Ln-Cn), which accounts for distribution effects of gate and drain feeding line. The number of seriate R-L-C can be chosen by the maximum operating frequency flexibly. As a result, we can get an accurate SSECM on certain frequency range with the minimum cost of extraction procedure and time. The proposed parasitic model has been added in the conventional SSECM and a GaN HEMT with gate length 0.1μm and 2×100μm is used for validation. The results show that the SSECM with N=2 and N=3 can well describe the scattering parameters with maximum frequency up to 66GHz and 110 GHz, respectively.
Study on the Treatment of Wastewater Containing Mercury by Macromolecular Heavy Metal Flocculant Mercaptoacetyl Polyethyleneimine

A novel water-soluble macromolecular heavy metal flocculant mercaptoacetyl polyethyleneimine (MAPEI) was synthesized by reacting polyethyleneimine (PEI) with thioglycolic acid (TGA). Removal of Hg 2+ and turbidity from aqueous solutions by induced flocculation of MAPEI was investigated. It was showed that MAPEI is efficient for the removal of Hg 2+ and turbidity simultaneously. The highest removal rate of mercury ions can reach above 95%. Factors such as pH, MW of PEI, co-existing ions and so on that could affect the process were studied. In the process of treating wastewater containing both turbidity and mercury ions, mercury ions and turbidity have a synergic removal effect with each other. Compared with TGA, MAPEI shows obvious advantages, including higher removal efficiency, larger floes and higher floe sedimentation velocity. In addition, compared with PEI, MAPEI can remove both turbidity and mercury ions very well while PEI removes only turbidity efficiently.
Folded Substrate Integrated Waveguide Based Composite Right/Left-Handed Transmission Line and Its Application to Partial $H$ -Plane Filters

Composite right/left-handed (CRLH) transmission line structures based on the folded substrate integrated waveguide (FSIW) are presented and discussed in this paper. This FSIW-based CRLH (FSIW-CRLH) transmission line exhibits much lower cut-off frequencies as compared to the ordinary FSIW of the same footprint, and furthermore, it requires only one-half width of the conventional substrate integrated waveguide (SIW) based CRLH (SIW-CRLH) transmission lines while possessing the same dispersion characteristics. In addition, the proposed structure offers the advantage of a high quality factor for preventing the guided-wave circuits from radiation as suffered in the previous open CRLH transmission line structures when operated in the fast-wave region. All of the aforementioned properties lend the proposed FSIW-based CRLH transmission lines best suited to miniaturized and guided-wave microwave applications. In this paper, a comprehensive study on the FSIW-CRLH transmission structures is conducted by means of its dispersion relation and Bloch impedance. In addition, two partial H-plane filters are implemented here to demonstrate the capabilities of miniaturization and high quality factor based on the proposed FSIW-CRLH structures. The resultant filters are shown to have about 80% size reduction as compared to the conventional FSIW filters, and 59% size reduction as compared to the SIW-CRLH filters. To the best of our knowledge, it is the first time that the partial H-plane filters are implemented utilizing both the dispersion behavior of the CRLH transmission structures and the structural benefits of the FSIW configuration.
Question detection from acoustic features using recurrent neural network with gated recurrent unit

Question detection is of importance for many speech applications. Only parts of the speech utterances can provide useful clues for question detection. Previous work of question detection using acoustic features in Mandarin conversation is weak in capturing such proper time context information, which could be modeled essentially in recurrent neural network (RNN) structure. In this paper, we conduct an investigation on recurrent approaches to cope with this problem. Based on gated recurrent unit (GRU), we build different RNN and bidirectional RNN (BRNN) models to extract efficient features at segment and utterance level. The particular advantage of GRU is it can determine a proper time scale to extract high-level contextual features. Experimental results show that the features extracted within proper time scale make the classifier perform better than the baseline method with pre-designed lexical and acoustic feature set.
Mixing It Up: A Double-Balanced Mixer with Wide RF and IF Bandwidth

This article presents the design details of a wide-band, high-dynamic-range passive gallium arsenide (GaAs) mixer submitted for the Student Design Competition (SDC) held during the IEEE Microwave Theory and Techniques Society (MTT-S) 2017 International Microwave Symposium in Honolulu, Hawaii, this past May. The target of our research was to achieve a wide-band mixer with high dynamic range and zero power consumption. The "High-Dynamic-Range Mixer" SDC was sponsored by Technical Coordination Committee MTT-22.
An obstacle avoidance sonar based SLAM algorithm for AUV integrated navigation

In this paper, we investigate a simultaneous localization and mapping (SLAM) algorithm based on obstacle avoidance sonar. The proposed algorithm is employed to improve the precision of long-distance and deep-sea navigation for autonomous underwater vehicles (AUVs) with payload capacity, power and cost constraints. Through the continuously estimation and observation of the vehicle states and the map, the resulting estimated error is sent back to the Inertial Navigation System (INS) for correction. Then, the accumulated errors of attitude, velocity and position caused by the distance increasing and time running can be effectively reduced. Extensive simulations are provided to show that the proposed algorithm can improve AUV navigation and positioning accuracy effectively.
A Quasi-Physical Compact Large-Signal Model for AlGaN/GaN HEMTs

This paper presents an accurate quasi-physical compact large-signal model for GaN high electron mobility transistors (HEMTs). The drain current <inline-formula> <tex-math notation="LaTeX">$I_{\mathrm {ds}}$ </tex-math></inline-formula> expression is acquired by combining the zone division method and the surface potential theory. The proposed <inline-formula> <tex-math notation="LaTeX">$I_{\mathrm {ds}}$ </tex-math></inline-formula> model only contains 19 empirical parameters, with self-heating, ambient temperature and trapping effects considered. The self-heating effects are modeled by a polynomial function of temperature and gate voltage for the critical electric field <inline-formula> <tex-math notation="LaTeX">$E_{c}$ </tex-math></inline-formula>. And the ambient temperature effects are modeled by modifying pinchoff voltage and maximal electron saturated velocity. The trapping effects are considered with an effective gate–source voltage method. Moreover, taking the advantage of good physical meaning, the proposed <inline-formula> <tex-math notation="LaTeX">$I_{\mathrm {ds}}$ </tex-math></inline-formula> model is scalable. In house 0.15-<inline-formula> <tex-math notation="LaTeX">$\mu \text{m}$ </tex-math></inline-formula> GaN HEMTs with different sizes are used to validate the model by dc <inline-formula> <tex-math notation="LaTeX">$I$ </tex-math></inline-formula>–<inline-formula> <tex-math notation="LaTeX">$V$ </tex-math></inline-formula> over a wide ambient temperature range, pulsed <inline-formula> <tex-math notation="LaTeX">$I$ </tex-math></inline-formula>–<inline-formula> <tex-math notation="LaTeX">$V$ </tex-math></inline-formula>, multibias S-parameters up to 50 GHz and multibias large-signal characteristics at <inline-formula> <tex-math notation="LaTeX">$f_{0} = 30$ </tex-math></inline-formula> GHz. The good results show that the proposed quasi-physical zone division model is useful for millimeter-wave GaN HEMTs development and circuit design.
Research on evaluating method of projects for complex system

In this paper, the concepts and characteristics of complex system, such as nonlinearity, gray, chaos and fuzzy, are given. The principle and method to deal with the characters are discussed. According to the theory of meta-synthesis from qualitation to qualitation and Wuli-Shili-Renli (WSR) methodology, the evaluating model of MDFGF for complex system projects is presented. The steps of the evaluation are provided.