"uuid","repository link","title","author","contributor","publication year","abstract","subject topic","language","publication type","publisher","isbn","issn","patent","patent status","bibliographic note","access restriction","embargo date","faculty","department","research group","programme","project","coordinates"
"uuid:8031fd80-767a-4408-a0a3-0c502eed201b","http://resolver.tudelft.nl/uuid:8031fd80-767a-4408-a0a3-0c502eed201b","Automated speech recognition technology to support in flight weather-related communication for GA pilots","Huang, G. (Purdue University); Pitts, B.J. (Purdue University)","","2019","Weather information latency during flight in general aviation (GA) has resulted in numerous incidents. Hands-free automated speech recognition (ASR) systems have the potential to help overcome this challenge and facilitate rapid weatherrelated information exchange. However, it is unclear to what extent ASR systems can support pilot communication in such noisy environments. The goals of this study were to (1) evaluate the performance of 7 commercially-available ASR systems to recognize weather phrases during GA operations and (2) determine whether speech-to-noise (S/N) ratio, flight phase, and accent type modulate system performance. Overall, the highest accuracy percentage achieved by any system was 72%, when the S/N ratio was at least 3/2. This research can help to inform the selection and development of next-generation technologies to be used in safety-critical, information-rich domains.","","en","conference paper","","","","","","","","","","","","","",""
"uuid:9150bbb7-6eaa-4177-b416-5704a695fc08","http://resolver.tudelft.nl/uuid:9150bbb7-6eaa-4177-b416-5704a695fc08","Quantitative Geotechnical Risk Management for Tunneling Projects in China","Huang, H.; Zhang, D.","","2015","To date, the tunneling in China is experiencing an age of fast development for decades. The potential risks behind the huge amount of construction and operation works in China was first formally realized and managed after 2002. The transition of risk assessment from a qualitative manner to a quantitative manner is on the way from the research gradually to the practice. This paper tries to share some experiences in the quantitative risk management for tunneling in China by introducing novel techniques and associated practical applications. The fuzzy fault tree analysis is used for hazard identification, the conditional Markov chain for probability analysis of soil spatial uncertainty, the quantitative vulnerability analysis for consequence evaluation and the field data based statistics for environmental impact risk analysis. All these novel methods have been validated successfully by applying into real cases shown in the paper. The dynamic feature of risk management is appreciated due to the different stages and scenarios of a tunnel project. The real-time monitoring technique developed using the LEDs and MEMS coupled with WSN could visualize the risk to the worker on site timely. The resilience analysis model to incorporate the high-impact low-chance risk for tunnel lining structure is introduced in the end of paper, which could assist the engineers to make the decision on performance recovery strategies once the tunnel goes through a significant disruption","Risk Visualization; Risk Management; Tunnel Project; Vulnerability; Resilience","en","conference paper","","","","","","","","","","","","","",""
"uuid:e11e9821-7baa-4684-89c7-bad7048b7935","http://resolver.tudelft.nl/uuid:e11e9821-7baa-4684-89c7-bad7048b7935","A Preliminary Study on the Comprehensive Evaluation of the Disaster Prevention System of Large Urban Underground Space","Xu, H.; Yu, M.; Huang, H.; Fan, Y.","","2015","The original urban planning can never meet the requirements of the rapid development and the increasing population in big cities in China. The best way to solve this problem is to develop the underground space (including tunnels). With the exhaustion and saturation of the shallow underground space, the development of urban area is more and more relying on the excavation of deep underground space. Nowadays, the advanced technology of high strength concrete, excavation method in soft soil and ground deformation control make it possible to build underground space with a larger scale, span length and depth. The common disasters and hazards that large urban underground space faces are the same as that of ordinary underground space, but considering the damage and the rescue difficulties, more attention should be paid to the influence of disasters on large underground space. The study and research on the evaluation of the disaster prevention system of underground space still have not raised enough attention yet. The Comprehensive Evaluation of the disaster prevention system is set up based on the study of the characteristics of large underground space itself and disaster effects. The evaluation of the prevention of fire, flood, earthquake and attack are discussed. This is a preliminary study of the future disaster management and emergency rescue of urban underground space.","comprehensive Evaluation; underground space; disaster characteristics; disaster prevention","en","conference paper","","","","","","","","","","","","","",""
"uuid:807c63a4-dc79-48d9-8b4d-4561f7c3a8d9","http://resolver.tudelft.nl/uuid:807c63a4-dc79-48d9-8b4d-4561f7c3a8d9","Scale of Fluctuation for Geotechnical Probabilistic Analysis","Nie, X.; Zhang, J.; Huang, H.; Liu, Z.; Lacasse, S.","","2015","In the past few years, random field theory has been increasingly used to model the inherent soil variability. The scale of fluctuation is one of the important parameters describing a stationary random field. In this study, the factors affecting an accurate estimation of the scale of fluctuation were studied with numerical experiments to show how a proper sampling strategy can help improve the estimate of scale of fluctuation. Hypothetical data sets were generated from random field theory. Data were then sampled for different sampling strategies. The scale of fluctuation estimated from the sampling programs were compared with the predefined scale of fluctuation. The accuracy with which one can estimate scale of fluctuation depends on both the sampling intensity and extent of the sampling range. For the numerical example in this study, the sampling interval should be close enough such that 10 samples are measured within one scale of fluctuation, and the distance covered by the sampling should cover at least 100 scales of fluctuation.","random field; scale of fluctuation; spatial variability; parameter estimation; sampling strategy","en","conference paper","","","","","","","","","","","","","",""
"uuid:0da66356-d0e4-4754-b6ef-985497e7c4f8","http://resolver.tudelft.nl/uuid:0da66356-d0e4-4754-b6ef-985497e7c4f8","Granular Contact Dynamics for the Probabilistic Stability Analysis of Slopes","Meng, J.; Huang, J.; Sloan, S.W.","","2015","Slope instability and landslides can be catastrophic events often leading to loss of life and property. To assess the risks of slope failures, it is often desired that the dynamic process of slope failure can be simulated. This paper proposes a Granular Contact Dynamics (GCD) approach based on variational principles and implicit time integration to simulate the failure process of slopes. The method has the ability to simulate fracture initiation and development (i.e., progressive failure process) and allows the consequence of slope failures to be assessed quantitatively. A two dimensional example is given to demonstrate the method.","landslide; risk assessment; contact dynamics; consequence","en","conference paper","","","","","","","","","","","","","",""
"uuid:7021e712-5400-4b63-b2ca-888586d34c26","http://resolver.tudelft.nl/uuid:7021e712-5400-4b63-b2ca-888586d34c26","Probabilistic Slope Stability Analysis using RFEM with Non-Stationary Random Fields","Griffiths, D.V.; Huang, J.; Fenton, G.A.","","2015","Using recently obtained deterministic results as a benchmark, probabilistic slope stability analyses have been performed on an undrained slope using the random finite element method (RFEM). Non-stationary random fields have been generated with linearly increasing mean undrained strength and a constant coefficient of variation. The influence of input spatial correlation and variance on the probability of slope failure in a test example is reported, and particular attention is drawn to the solutions corresponding to extreme values of the spatial correlation length.","slope stability; finite elements; RFEM; random fields","en","conference paper","","","","","","","","","","","","","",""
"uuid:ac69a7d0-228e-483a-86ff-63ca63e73637","http://resolver.tudelft.nl/uuid:ac69a7d0-228e-483a-86ff-63ca63e73637","Stochastic simulation of non-stationary continuous multifractal time series","Schmitt, F.G.; Huang, X.","Schmitt, F.G. (author); Huang, X. (author)","2015","Intermittency is an ubiquitous property of fully developed turbulence, for Eulerian and Lagrangian fields, and for velocity, passive and active scalars. Intermittency corresponds to multi-scale high fluctuations, with some underlying long-range correlations. Such property is usually characterized using scaling approaches, verified using experimental or numerical data. However there are only few studies devoted to the generation of continuous stochastic processes having non-stationary multifractal properties, able to mimic Eulerian or Lagrangian velocity or passive scalar time series. Here we review recent works on this topic, and we provide stochastic simulations in order to verify the theoretical predictions. In the lognormal framework we provide a $h-\mu$ plane expressing the scale invariant properties of these simulations.","","en","conference paper","","","","","","","","","","","","","",""
"uuid:6b18d198-9227-4143-a131-aac6a3d452de","http://resolver.tudelft.nl/uuid:6b18d198-9227-4143-a131-aac6a3d452de","Scaling analysis based on extremal point topology","Wang, L.; Huang, Y.","Wang, L. (author); Huang, Y. (author)","2015","The interaction of different scales is among the most interesting and challenging features in turbulence research. Existing approaches used for scaling analysis such as structure-function and Fourier spectrum method have their respective limitations, for instance scale mixing, i.e. the so-called infrared and ultraviolet effects. To make improvement in this regard, a new method, multi-level segment analysis (MSA) based on the local extrema statistics, has been developed. Data test results show that MSA can successfully reveal different scaling regimes in complex systems such as Lagrangian and two-dimensional turbulence, which have been remaining controversial in turbulence research. In principle MSA can generally be applied for various analyses.","","en","conference paper","","","","","","","","","","","","","",""
"uuid:6e638c47-5763-4219-a2ed-4a79239b5f34","http://resolver.tudelft.nl/uuid:6e638c47-5763-4219-a2ed-4a79239b5f34","Effect of linear feedback control on the optimal transient growth in particle-laden channel flow","Song, Y.; Xu, C.; Huang, W.","Song, Y. (author); Xu, C. (author); Huang, W. (author)","2015","The optimal transient growth process in a particle-laden channel flow is studied under the influence of the linear feedback control. The equilibrium Eulerian approach with the assumption that the particles are small and spherical is adopted. The effect of initial distribution of particles on the optimal transient growth of perturbations is discussed. The LQG control of the particle-laden flow system is considered and compared with the no control cases.","","en","conference paper","","","","","","","","","","","","","",""
"uuid:05c10738-f00f-4973-bad7-38b324cbafdc","http://resolver.tudelft.nl/uuid:05c10738-f00f-4973-bad7-38b324cbafdc","Off-board Visual Odometry and Control of an Ultralight Quadrotor MAV","Li, K.; Huang, R.; Phang, S.K.; Lai, S.; Wang, F.; Tan, P.; Chen, B.M.; Lee, T.H.","","2014","In this paper, we propose an approach to autonomously control a quadrotor micro aerial vehicle (MAV). With take-off weight of 50 g and 8-min flight endurance, the MAV platform codenamed KayLion developed by the National University of Singapore (NUS) is able to perform autonomous flight with pre-planned path tracking. The vision-based autonomous control is realized with a light weight camera system and an ultrasonic range finder integrated to the MAV. An optical flow algorithm is adopted and processed on ground control station to provide position and velocity estimation of the MAV. A model-based position controller is implemented to realize autonomous flight.","IMAV2014; MAV; ultralight; quadrotors; micro aerial vehicles","en","conference paper","","","","","","","","","","","","","",""
"uuid:29c12b68-7293-44b1-b89b-824997b68a29","http://resolver.tudelft.nl/uuid:29c12b68-7293-44b1-b89b-824997b68a29","A Semantically-Enabled System for Clinical Trials (demonstration)","Huang, Z.; Ten Teije, A.; Van Harmelen, F.","","2013","In this demo we present SemanticCT, a semantically-enabled systems for clinical trials. SemanticCT is built on the top of LarKC, a platform for scalable semantic data processing. SemanticCT has been integrated with large-scale trial data and patient data, and provided various automatic services for clinical trials, which include automatic patient recruitment service (i.e., identifying eligible patients for a trial), trial finding service (i.e., finding suitable trials for a patient), and trial feasibility service (i.e., analyzing possible recruitment at design time).","","en","conference paper","","","","","","","","","","","","","",""
"uuid:be80ff30-33bc-4703-bd51-33f105bb8d6f","http://resolver.tudelft.nl/uuid:be80ff30-33bc-4703-bd51-33f105bb8d6f","Rule-based formalization of eligibility criteria for clinical trials (abstract)","Huang, Z.; Ten Teije, A.; Van Harmelen, F.","","2013","In this extended abstract, we propose a rule-based formalization of eligibility criteria for clinical trials. The rule-based formalization is implemented by using the logic programming language Prolog. Compared with existing formalizations such as pattern-based and script-based languages, the rule-based formalization has the advantages of being declarative, expressive, reusable and easy to maintain. Our rule-based formalization is based on a general framework for eligibility criteria containing three types of knowledge: (1) trial-specific knowledge, (2) domain-specific knowledge and (3) common knowledge. This framework enables the reuse of several parts of the formalization of eligibility criteria. We have implemented the proposed rule-based formalization in SemanticCT, a semantically-enabled system for clinical trials, showing the feasibility of using our rule-based formalization of eligibility criteria for supporting patient recruitment in clinical trial systems.","","en","conference paper","","","","","","","","","","","","","",""
"uuid:27cf69fa-bc7a-4737-8992-cae11bb4e5b7","http://resolver.tudelft.nl/uuid:27cf69fa-bc7a-4737-8992-cae11bb4e5b7","Self-healing evolution of oxidized surface of AL4SIC4 and its effect on mechanical properties","Huang, X.; Geng, X.; Wen, G.; Song, G.; Zhou, Y.","","2013","Abstract only.","Al4SiC4; microstructure; self-healing; mechanical testing","en","conference paper","","","","","","","","","","","","","",""
"uuid:dbba4152-d499-4e5e-84a4-5cfbb00d4236","http://resolver.tudelft.nl/uuid:dbba4152-d499-4e5e-84a4-5cfbb00d4236","Possibility of self-healing by using capsules and vascular system to provide water in cementititious materials","Huang, H.; Ye, G.","","2013","Since self-healing of cracks is able to improve the durability of concrete structures, it has attracted much attention in the recent years. As known, in concrete matrix there are large amounts of cement grains remaining unhydrated, particularly in high performance concrete. Further hydration of these unhydrated cement grains has potential to heal cracks when additional water is available. By now, using capsules or vascular system are the main approaches to supply liquid healing agents inside the materials for self-healing. However, it is still uncertain about the possibility of these two approaches for the supply of water for self-healing in concrete. For this question, self-healing in concrete by using capsules or vascular system to provide water was investigated. Self-healing triggered by water was simulated and consequently, the filling fraction of a crack as a function of healing time was calculated. Moreover, the probability of the crack hitting capsules was calculated as well. Based on this information, the possibility of self-healing by using capsules to provide water was determined. Meanwhile, in the case of using vascular system, ultrasonic pulse velocity measurements were carried out to evaluate the self-healing efficiency in concrete. From the results, it was found that using capsules to supply water for self-healing has very low efficiency. In comparison, the recovery of ultrasonic pulse velocity through the cracked sample can achieve 80% after supplying water for self-healing for 330 hours by vascular system. Thereby, using vascular system to supply water for selfhealing is more feasible than using capsules.","self-healing; capsules; vascular system; cementitious materials","en","conference paper","","","","","","","","","","","","","",""
"uuid:3c8b4bb9-ee62-4842-9e8f-25755a9feb71","http://resolver.tudelft.nl/uuid:3c8b4bb9-ee62-4842-9e8f-25755a9feb71","Inorganic powder encapsulated in brittle polymer particles for self-healing cement-based materials","Dong, H.; Huang, H.; Ye, G.","","2013","Many types of healing agents have been investigated. These agents are processed in different ways, such as adhesive polymer in capsules or hollow fibre glasses, bacteria in porous aggregates and geo-materials directly incorporated in the cementbased materials. In this study, sodium silicate powder is encapsulated in polystyrene particles (polystyrene particle containing sodium silicate is defined as PS particle in short). The PS particles remain intact in the cement-based matrix before cracking. If water or moisture is available, the healing agent can be released into the crack provided that the crack passes through the PS particles. The dissolved sodium silicate reacts with calcium hydroxide in the matrix, and the healing products (C-S-H gel) can form in the crack. Furthermore, compared to the reference, for the cracked specimens with polystyrene particles, the recovery of flexural stiffness can be observed. Different sizes and mass fractions, i.e. sodium silicate / cement ratios, of PS particles used in engineered cementitious composite (ECC) mixture are studied to see their influence on mechanical properties as well as their healing efficiency. When the mass fraction of polystyrene particles is 4% of cement and the polystyrene particles have a proper slender shape, the ECC show good results in terms of flexural strength, flexural deflection capacity and recovery of mechanical properties. Therefore, encapsulation of healing agent in polystyrene could be regarded as a promising way for realising self-healing of cement-based materials.","cement-based material; healing agent; encapsulation; polystyrene; ECC","en","conference paper","","","","","","","","","","","","","",""
"uuid:3d1b61ff-da41-4b3d-978a-edd720c91cd7","http://resolver.tudelft.nl/uuid:3d1b61ff-da41-4b3d-978a-edd720c91cd7","Improved active shape model for facial feature localization","Huang, H.Y.; Hsu, S.H.","","2011","For face representation, the illumination effect is an important factor, in order to reduce illumination factor, we propose a facial feature location method based on improved active shape model (IASM) to reduce the drawback of intensity contrast and to enhance edge information. First, the face images are preprocessed by the proposed illumination normalization method using Gabor wavelets. Then, the location of facial features can fit more efficient and fast by the Gabor kernels reduction and the proposed feature-based weighted warping method. Based on our method, it not only obtains the better face alignment but also overcomes the active shape model (ASM) method which caused the failure for aligned target. Experimental results show that this approach can achieve in JAFFE face database with seven type facial expressions and Yale face database_B with varied illumination conditions.","","en","conference paper","","","","","","","","","","","","","",""
"uuid:c9cc99e2-6faf-47e6-b664-0276e4500435","http://resolver.tudelft.nl/uuid:c9cc99e2-6faf-47e6-b664-0276e4500435","Computation of Modal Radiation through an Engine Exhaust on Adaptively Refined Meshes","Huang, X.; Ma, Z.; Zhang, X.","","2006","This paper outlines the method of a block-structured adaptive mesh refinement (AMR) and its application to the computation of noise radiation from a realistic engine exhaust geometry with flow. The computational model described allows acoustic waves, propagating inside the bypass duct of a generic aircraft engine, to be admitted into a computational domain that includes the aft duct section, the exit plane of the duct, and the jet flow immediately downstream. Other than working on a uniformly fine mesh, the computational mesh is adaptively refined as the propagation and radiation of acoustic waves with the aim of reducing the number of computational cells and improving the computational efficiency. The method is mainly consisted of three parts: an AMR framework to manage adaptively refined meshes; a range of $4^{th}$-order schemes to compute the near-field acoustic propagation and radiation; and an integral surface for predicting far-field directivity. Propagation inside the duct, diffraction at the lip of the duct and propagation into the near field is firstly modeled by the linearised Euler equations. Hydrodynamic instabilities are discovered in the exhaust mean flow and are leading to overwhelm the acoustic solutions. In order to suppress this kind of non-physical instabilities, the original linearised Euler equations are replaced with the acoustic perturbation equations, which have been extended in the cylindrical coordinates for this case. The effect and the accuracy of the acoustic perturbation equations are validated by comparing to solutions of the linearised Euler equations through a case study of the radiation of single spinning mode from a generic engine bypass duct. The quality of the proposed AMR method is also illustrated. For this case the computational efficiency of AMR is compared with that computed on a uniformly fine mesh. The results demonstrate the efficiency of the current adaptive mesh refinement algorithm.","duct acoustics; aeroengine; ddaptive mesh refinement; computational aeroacoustics; linearised Euler equations; acoustic perturbation equations","en","conference paper","","","","","","","","","","","","","",""