bluuebunny/crossref_metadata_2025 huggingface dataset:
Asymptotics of the Stirling numbers of the second kind revisited
Authors: Louchard Guy
Published: June 2013

Using the Saddle point method and multiseries expansions, we obtain from the
generating function of the Stirling numbers of the second kind {n / m} and
Cauchy's integral formula, asymptotic results in central and non-central
regions. In the central region, we revisit the celebrated Gaussian theorem
with more precision. In the region m = n - na, 1 > a > 1/2, we analyze the
dependence of {n / m} on a. An extension of some Moser and Wyman's result to
full m range is also provided. This paper fits within the framework of
Analytic Combinatorics.
Reviewing the SEC's Review Process: 10-K Comment Letters and the Cost of Remediation
Authors: Cassell Cory A. , Dreher Lauren M. , Myers Linda A.
Published: June 2013

Securities and Exchange Commission (SEC) comment letters provide independent and timely feedback on the clarity of disclosures and on the extent to which filings comply with Generally Accepted Accounting Principles and SEC reporting regulations. We investigate factors that affect the probability of receiving a 10-K comment letter, the extent of comments received, and the cost of remediation. We find that in addition to factors explicitly stated to increase SEC scrutiny in Section 408 of the Sarbanes-Oxley Act, low profitability, high complexity, engaging a small audit firm, and weaknesses in governance are positively associated with the receipt of a comment letter, the extent of comments, and the cost of remediation. The probability that the comment letter results in a restatement is higher for smaller companies and for companies engaging a small audit firm. We also provide evidence that comments relating to accounting issues result in higher remediation costs, largely due to the additional time required to resolve comments relating to classification issues and fair value issues. Our findings should be of interest to stakeholders who use SEC comment letters to assess disclosure quality and reporting compliance, and to managers and other stakeholders impacted by costs associated with the SEC's review process.

Data Availability All data used in the study are publicly available from the sources cited in the text.
Contraction and AICAR Stimulate IL-6 Vesicle Depletion From Skeletal Muscle Fibers In Vivo
Authors: Lauritzen Hans P.M.M. , Brandauer Josef , Schjerling Peter , Koh Ho-Jin , Treebak Jonas T. , Hirshman Michael F. , Galbo Henrik , Goodyear Laurie J.
Published: June 2013

Recent studies suggest that interleukin 6 (IL-6) is released from contracting skeletal muscles; however, the cellular origin, secretion kinetics, and signaling mechanisms regulating IL-6 secretion are unknown. To address these questions, we developed imaging methodology to study IL-6 in fixed mouse muscle fibers and in live animals in vivo. Using confocal imaging to visualize endogenous IL-6 protein in fixed muscle fibers, we found IL-6 in small vesicle structures distributed throughout the fibers under basal (resting) conditions. To determine the kinetics of IL-6 secretion, intact quadriceps muscles were transfected with enhanced green fluorescent protein (EGFP)-tagged IL-6 (IL-6-EGFP), and 5 days later anesthetized mice were imaged before and after muscle contractions in situ. Contractions decreased IL-6-EGFP–containing vesicles and protein by 62% (P < 0.05), occurring rapidly and progressively over 25 min of contraction. However, contraction-mediated IL-6-EGFP reduction was normal in muscle-specific AMP-activated protein kinase (AMPK) α2-inactive transgenic mice. In contrast, the AMPK activator AICAR decreased IL-6-EGFP vesicles, an effect that was inhibited in the transgenic mice. In conclusion, resting skeletal muscles contain IL-6–positive vesicles that are expressed throughout myofibers. Contractions stimulate the rapid reduction of IL-6 in myofibers, occurring through an AMPKα2-independent mechanism. This novel imaging methodology clearly establishes IL-6 as a contraction-stimulated myokine and can be used to characterize the secretion kinetics of other putative myokines.
Comparison of Buccal Infiltration of 4% Articaine With 1 : 100,000 and 1 : 200,000 Epinephrine for Extraction of Maxillary Third Molars With Pericoronitis: A Pilot Study
Authors: Lima José Lacet , Dias-Ribeiro Eduardo , Ferreira-Rocha Julierme , Soares Ramon , Costa Fábio Wildson Gurgel , Fan Song , Sant'ana Eduardo
Published: June 2013

We compared the buccal infiltration of 4% articaine with 1 : 100,000 or 1 : 200,000 epinephrine without a palatal injection for the extraction of impacted maxillary third molars with chronic pericoronitis. This prospective, double-blind, controlled clinical trial involved 30 patients between the ages of 15 and 46 years who desired extraction of a partially impacted upper third molar with pericoronitis. Group 1 (15 patients) received 4% articaine with 1 : 100,000 epinephrine and group 2 (15 patients) received 4% articaine with 1 : 200,000 epinephrine by buccal infiltration. None of the patients in group 1 reported pain, but 3 patients in group 2 reported pain, which indicated a need for a supplementary palatal injection. The palatal injections were all successful in eliminating the pain. Two additional patients in group 2 experienced pain when the suture needle penetrated their palatal mucosa. Based on these results, 4% articaine with 1 : 100,000 epinephrine was found to be more effective for the removal of upper third molars in the presence of pericoronitis than 4% articaine hydrochloride with 1 : 200,000 epinephrine when only a buccal infiltration was used.
Prevention of Sevoflurane Delirium and Agitation With Propofol
Authors: Messieha Zakaria
Published: June 2013

Emergence delirium and agitation (EAD) associated with sevoflurane general anesthesia are very commonly observed in young children. Such events pose a risk for injury as well as decreased parental satisfaction, especially in the ambulatory and office-based setting. This article reviews the different approaches described in the literature to reduce EAD. A novel approach using a Bispectral Index System (BIS)-guided anesthesia with propofol washout technique is proposed as a viable and effective approach to prevent EAD.
Bioaccumulation of 1-butyl-3-methylimidazolium chloride ionic liquid in a simple marine trophic chain
Authors: Nędzi Marcin , Latała Adam , Nichthauser Joanna , Stepnowski Piotr
Published: June 2013

This study focused on the bioaccumulation intensities of the ionic liquid (IL) 1-butyl-3-methylimidazolium chloride (bmimCl) by two invertebrates: Mytilus trossulus and Balanus improvisus and the green alga Chlorella vulgaris. The bioconcentration of bmimCl by two invertebrates was tested in the contaminated water, both with and without the presence of green algae previously exposed to the bmimCl. The experimentally obtained bioconcentration factors (BCFs) are quite low and do not exceed the value of 10. The presence of contaminated C. vulgaris in the water induces an increase in BCF of barnacles up to 80% in comparison to barnacles exposed only to contaminated water. Detoxication of M. trossulus may be more effective in the presence of higher IL concentrations. BCFs for hard tissues of the mussel indicates an exclusively physical sorption mechanism on the mineral surface.
The use of the Biological Diatom Index (BDI) for the assessment of water quality in the Pilica River, Poland
Authors: Szulc Bogusław , Szulc Katarzyna
Published: June 2013

The main aim of this study was to assess the usefulness of the Biological Diatom Index (BDI) (Lenoir & Coste 1996) for the estimation of water quality in the central section of the Pilica River, located in central Poland in Łódź province. The BDI has never been used before to monitor Polish surface waters. An analysis of the correlations between the values of the BDI and selected physico-chemical parameters was performed, as was an assessment of water quality using the BDI. On the basis of value ranges proposed by Descy and Ector (1996), a good ecological status in the Pilica River was obtained, but this did not correspond with the results achieved from the physico-chemical analysis. This study proposes new value ranges for the BDI. With these new values, the ecological state of the Pilica River changed from good to moderate, which corresponded with the physico-chemical analysis of the water. The new, proposed value ranges for the BDI assess more precisely the quality of water in lowland Polish rivers.
Transport of the river load from the Błądzikowski stream to the puck lagoon (southern Baltic Sea, Poland)
Authors: Damaszke Marta , Szymczak Ewa
Published: June 2013

The main aim of this study was to determine the size of the load carried by the Błądzikowski Stream and discharged into the Puck Lagoon, and the role of the river load in the formation of the sea bed deposits at the stream mouth. The Błądzikowski Stream, with the length of only 10 km, discharges about 610 tons of sediment into the Puck Lagoon per year, including 89.8% (548 tons) of the bed load and 10.2% (62 tons) of the suspended load. The amount is 4.9% of the river load discharged into the Puck Lagoon. Mineral particles are more common in the composition of the river load and account for 94.6% of the suspended load and 98.7% of the bed load. It is mainly the bed load deposited in the estuarine area that creates a contemporary underwater accumulation form in the Puck Lagoon, which is corroborated by the granulometric composition of the channel and surface sediments; the suspended load is carried further into the Lagoon.
Comparative Study of Mustard Oil Cake and Soybean Meal Based Artificial Diet for Rohu, Labeo rohita (Ham.) Fingerlings
Authors: Jahan DA , Hussain L , Islam MA , Khan M
Published: June 2013

An experiment was conducted to evaluate the nutritive potential of soybean meal and mustard oil cake based diets for rearing of Labeo rohita fingerlings under pond condition at the Bangladesh Agricultural University, Mymonsingh during 2008. Three diets designated as treatments were formulated and fed to the stocked fingerlings. Studies have revealed an increase in final weight, average live weight gain, specific growth rate (SGR), lower food conversion ratio (FCR), protein efficacy ratio (PER) and apparent net protein utilization (ANPU%) and survival of fingerlings fed on diet D3, a soybean meal based diet. Carcass composition also revealed high protein and lipid in fish fed on the diet D3. DOI: http://dx.doi.org/10.3329/agric.v11i1.15244 The Agriculturists 2013; 11(1) 61-66
Screening of Salt Tolerant CIP Potato Germplasm for Saline Areas
Authors: Rahman MH , Patwary MM Alam , Barua H , Hossain M , Hasan MM
Published: June 2013

Fifteen salt tolerant CIP (International Potato Centre) Potato genotypes along with BARI (Bangladesh Agricultural Research Institute) Alu 7 (Diamant) and one local variety viz., Dohazari Sada were evaluated at Bashkhali, Chittagong during 2011-12 to screen the suitable genotypes for cultivation in saline areas of Bangladesh. Diamant and Dohazari Sada and all of the CIP genotypes were found to grow well up to 60 DAP (Days After Planting) at saline areas having healthy plants and no senescence was noticed but after that 61-100% plants died due to high level of soil salinity (6.41dS/m) depending on genotypes. Genotype CIP 112 gave the highest yield (21.07 t/ha) and CIP 102 was comparatively less affected by soil salinity than the other genotypes. However, all the salt tolerant CIP genotypes were found to be promising in the saline soil. DOI: http://dx.doi.org/10.3329/agric.v11i1.15249 The Agriculturists 2013; 11(1) 95-102
Risk-Based Evaluation of Total Petroleum Hydrocarbons in Vapor Intrusion Studies
Authors: Brewer Roger , Nagashima Josh , Kelley Michael , Heskett Marvin , Rigby Mark
Published: June 2013

This paper presents a quantitative method for the risk-based evaluation of Total Petroleum Hydrocarbons (TPH) in vapor intrusion investigations. Vapors from petroleum fuels are characterized by a complex mixture of aliphatic and, to a lesser extent, aromatic compounds. These compounds can be measured and described in terms of TPH carbon ranges. Toxicity factors published by USEPA and other parties allow development of risk-based, air and soil vapor screening levels for each carbon range in the same manner as done for individual compounds such as benzene. The relative, carbon range makeup of petroleum vapors can be used to develop weighted, site-specific or generic screening levels for TPH. At some critical ratio of TPH to a targeted, individual compound, the overwhelming proportion of TPH will drive vapor intrusion risk over the individual compound. This is particularly true for vapors associated with diesel and other middle distillate fuels, but can also be the case for low-benzene gasolines or even for high-benzene gasolines if an adequately conservative, target risk is not applied to individually targeted chemicals. This necessitates a re-evaluation of the reliance on benzene and other individual compounds as a stand-alone tool to evaluate vapor intrusion risk associated with petroleum.
L’origine transnationale d’une réponse au VIH/SIDA dans la province du Henan
Authors: Rollet Vincent
Published: June 2013

La campagne du Henan reste aujourd’hui l’une des régions de Chine les plus affectées par le VIH/ SIDA. Parallèlement aux politiques et stratégies officielles mises en oeuvre pour répondre à l’ampleur de la propagation de la maladie dans cette province, les paysans d’un certain nombre de villages les plus affectés par ce virus ont réussi, depuis quelques années, à progressivement se mobiliser et à apporter une réponse locale adaptée aux défis sociaux que fait peser le SIDA sur les communautés villageoises. Cet article s’intéressera particulièrement à l’origine transnationale de cette mobilisation locale.
Communauté, normes sociales et construction des identités chez de jeunes homosexuels de Hefei
Authors: Miège Pierre
Published: June 2013

À partir d’entretiens menés auprès de jeunes homosexuels de Hefei (Anhui), cet article explore les modes précaires de socialisation de jeunes tongzhi, centrés autour de l’internet et de petits groupes d’amis. Leur difficulté à construire une identité fondée sur la sexualité apparaît dans le contexte de normes et de rôles sociaux qu’ils ne peuvent se résoudre à braver, avant tout en raison de sentiments de respect et de devoir envers leurs parents.
Une stèle pour les 36 millions de victimes de la Grande famine
Authors: Youyu Xu , Bonnin Jêrome
Published: June 2013

Depuis le début des années 1990, Yang Jisheng, l’auteur de Stèle funéraire, s’est servi de son statut de journaliste à l’Agence Chine nouvelle pour enquêter sur la Grande famine de la Chine des années 1960. Il a eu ainsi la possibilité d’effectuer de nombreuses interviews dans tout le pays, de se référer à des documents de premier plan, aussi précis qu’exhaustifs sur le sujet et de produire finalement une oeuvre comparable à L’Archipel du Goulag de Soljenitsyne. Son livre rend compte de la cruelle réalité de la Chine de cette époque, province après province, dissèque les origines de la famine et réfute avec force les mensonges de la version historique officielle. En outre, l’auteur rend publique une somme considérable d’informations confidentielles, comme celle de l’ordre donné par Zhou Enlai de détruire les documents contenant le nombre de morts pendant la famine, après que Mao et lui-même en eurent pris connaissance. [ Kaifang]
Au-delà de la loi, le Surmoi
Authors: Vanier Alain , Chaffel Boris , Vermont Élodie
Published: June 2013

Dans cette interview, le psychanalyste Alain Vanier dégage les enjeux méta-psychologiques de la notion de Surmoi pour la clinique de l’enfant et de l’adolescent, en retraçant les conditions de son élaboration par Freud et ses développements chez M. Klein et J. Lacan. Loin de n’être qu’une instance légiférante et indexée à la Loi, le Surmoi est fait de commandements paradoxaux, voire féroces, qui convoquent la jouissance du sujet. Au-delà de l’interdit, ces injonctions intériorisées obligent le sujet à désirer l’impossible, au nom de l’idéal, et peuvent être appréhendées cliniquement via « la grosse voix » et le regard scrutateur que certains enfants et adolescents, qu’ils soient écrasés, empêchés d’apprendre et/ou de réussir, ou encore qu’ils posent des actes délinquantiels, viennent convoquer réellement.
Traverser l'adolescence avec un diabète
Authors: Aboab Audrey , Leblanc Antoine
Published: June 2013

Un médecin pédiatre expose deux vignettes cliniques d’adolescents diabétiques ; l’un d’entre eux gère sans difficulté apparente ses traitements et son hygiène de vie alors que le deuxième rencontre des difficultés importantes à intégrer les contraintes et les obligations engendrées par la maladie. À partir de ces deux cas cliniques, une psychologue intervenant en secteur pédiatrique tente d’apporter un éclairage sur les difficultés psychiques, sociales et familiales que peuvent être amenés à traverser ces adolescents diabétiques, et leur impact sur la prise en charge de la maladie. Elle interroge également la place délicate des parents ainsi que celle du médecin référent dans cette traversée du diabète à l’adolescence.
L'enfant, l'humour et Winnicott : la face cachée du Surmoi
Authors: Tancray Jérémy
Published: June 2013

L’utilisation de l’humour dans le travail clinique demeure une pratique suspecte pour un grand nombre de cliniciens. Souvent effrayés par sa dimension séductrice, ils en oublient que Freud l’a théorisé et que Winnicott le considérait comme un phénomène transitionnel. Winnicott nous ouvre les portes de sa consultation thérapeutique et nous donne l’occasion d’observer in vivo la place qu’il donne à l’humour dans sa rencontre avec l’enfant. De nouvelles potentialités cliniques se dessinent et l’humour, comme le transfert en son temps, sublime l’embarras qu’il suscite pour devenir un allié du thérapeute.
Le cérémonial du vestiaire
Authors: Damien Robert
Published: June 2013

Le vestiaire n’est pas un lieu trivial. C’est une enceinte rigoureusement architecturée où l’organisation du nous requiert de chacun qu’il se dépouille avant de prendre l’habit, qu’il se concentre et s’équipe en vue de se livrer, en forme et fraternellement, au bonheur du combat.
Internet et la ville
Authors: Forestier Florian
Published: June 2013

La métaphore urbaine est pertinente et féconde pour comprendre ce qu’est le cyberespace. On observe du reste, concrètement, une hybridation de ces deux espaces : à mesure que le Web s’inscrit de plus en plus étroitement dans notre pratique quotidienne de la ville, celle-ci en acquiert une profondeur nouvelle, à la fois cognitive et vécue.
An introduction to the renewal of taxonomy
Authors: Faugère Elsa , Arpin Isabelle
Published: June 2013

The text shows how taxonomy, also called systematics, through the different approaches and techniques used (including barcoding) for the exploration and documentation of new species, engages in a struggle for survival in a context less influenced by the same limitations of the biodiversity to be studied than by the very organization of the discipline itself, such as the absence of specialists for certain taxa and geopolitical and intellectual property restrictions (as in the case of expeditions to countries in the South). The authors show the need to include researchers from disciplines such as the social sciences in biodiversity studies in order to transform and open up fields of research, thanks to the results obtained in the various naturalist expeditions. The text details the problems arising from the difficulties in establishing relationships of trust between systematicians and social scientists. These difficulties in the exchange of information and techniques threaten the attempt to take taxonomy out of the academic context and give the discipline the long-awaited renewal.
Online Real-Time Detection Method for Defects of Railroad Track Surface
Authors: Dai Guang Yu , Zhang Jun , Lü Kun Lin , Guo Long , Sun Liang , Fang Jun Bin , Chen Zhe , Yu Jian Hui
Published: June 2013

In the field of detecting for defects of railroad track surface, computer vision method for detection has been widely used. An online real-time image processing system for defects of railroad track surface is introduced in the paper. Results show that: if the number of pixels in each railroad track surface image is 512×240, the train speed can be 50 Km/h while the image processing system can real-time detect the railway track surface defects, the number of pixels in in each railroad track surface image is 320×250, the train speed can be 100 Km/h while the image processing system can real-time detect the railway track surface defects.
Robust Spatial-Color Feature with New Similarity Measure and Adaptive Template Update for Mean-Shift Tracking
Authors: Shen Lu Rong , Dong Xia Bin , Lu Rui Tao , Zheng Yong Bin , Huang Xin Sheng
Published: June 2013

In this paper, we analyze the object tracking task of mean-shift algorithm. A spatial-color and similarity based mean-shift tracking algorithm is proposed. The spatial-color feature is used to replace the color histogram, and an enhanced algorithm is derived by adopting a new similarity measure. We also introduce Lucas-Kanade algorithm to design a template update strategy, propose a template update algorithm for mean-shift. Experimental results show that these two improved mean-shift tracking algorithms have high tracking accuracy and good robustness to the change of appearance of the object.
Algorithm of Surveillance Video Synopsis Based on Objects
Authors: Cao Jian Rong , Xu Yang , Liu Cai Yun
Published: June 2013

After background modeling and segmenting of moving object for surveillance video, this paper firstly presented a noninteractive matting algorithm of video moving object based on GrabCut. These matted moving objects then were placed in a background image on the condition of nonoverlapping arrangement, so a frame could be obtained with several moving objects placed in a background image. Finally, a series of these frame images could be achieved in timeline and a single camera surveillance video synopsis could be formed. The experimental results show that this video synopsis has the features of conciseness and readable concentrated form and the efficiency of browsing and retrieval can be improved.
Research and Application of the Multimedia Technology in the Production of Boutique Open Video Class
Authors: Yang Dong Li , Liu Si Yu , Lv Sheng Yi
Published: June 2013

The paper illustrates the background of boutique open video class in China, and the differences between the boutique open video class and the boutique shared class. It also discusses the domestic study of the strategy of forming the online open courses initiated by foreign distinguished universities in recent years. By the comparison of the strategy used at home and abroad in terms of equipment, shooting techniques, and multimedia technology utilization, it draws the revelation of producing boutique video open classes.
A Higher Intelligibility Speech-Enhancement Algorithm
Authors: Liu Peng , Ma Jian Fen
Published: June 2013

A higher intelligibility speech-enhancement algorithm based on subspace is proposed. The majority existing speech-enhancement algorithms cannot effectively improve enhanced speech intelligibility. One important reason is that they only use Minimum Mean Square Error (MMSE) to constrain speech distortion but ignore that speech distortion region differences have a significant effect on intelligibility. A priori Signal Noise Ratio (SNR) and gain matrix were used to determine the distortion region. Then the gain matrix was modified to constrain the magnitude spectrum of the amplification distortion in excess of 6.02 dB which damages intelligibility much. Both objective evaluation and subjective audition show that the proposed algorithm does improve the enhanced speech intelligibility.
Fast Edge Detection Based on Mathematical Morphology for Straight Line Paths of Vision Navigation in AGV System
Authors: Li Zhong Ming , Su Zhi Yuan , Zhang Jing Tian
Published: June 2013

Fast processing and recognition of image have an important influence on the real-time performance of AGV by vision navigation. The fast method of edge detection based on mathematical morphology for straight line path is proposed in this paper. Binary processing is implemented firstly for path image. Then the edge detection using morphological gradient can be executed directly, and image filtering and recognition of path edge can be realized simultaneously. Kinematics model of AGV is built and the shape of structure element in morphology processing can be adjusted in real time. The results of experiment show that recognition time of straight line path is shorten by this image processing method.
Network of Visual Arts and Contemporary Art Pattern Reorganization
Authors: Zhong Wen Jing
Published: June 2013

This article, based on changes in the pattern of study of contemporary art network of visual arts, contemporary art in the space environment of the network visual arts, visual arts language of visual media, interactive cyberspace realm of art, information and digital communication art platform for contemporary art pattern the basic structure of the reorganization. Through integration of the modern network multi-media production technology and visual vision production method, the traditional art like Painting, Architecture art and Dace could form a new form of art performance and visual language, and enriched the modern context of art dialogue and culture space, which is the new construction of network visual art to the modern art pattern. Compared with the real world, it is virtual and transcendent, however, Network of Visual art provided a real situation of visual experience and psychological experience to a expanding real situation. By the use of network visual space and various visual information, the thinking way and expression platform of modern digital art creation have been extended and expanded.
Movie Audio Retrieval Based on HCT
Authors: Ding Xiang Rong , Yang Ji Cheng
Published: June 2013

This paper proposes a method of movie audio retrieval based on HCT. Minimum distance is used as distance function of HCT, which is used to control HCT growing and retrieval. Experimental results have demonstrated that the recall can reach 100%.
Research on Physical MPPT of Photovoltaic Array System Based on Image Processing
Authors: Liu Chao , Hui Jing
Published: June 2013

Based on analyzing the development and the performance feature of existing solar tracker, we propose a solar Maximum Power Point Tracking (MPPT) strategy which combines photoelectric sensor and image processing. Firstly, photoelectric tracking mode positions the sun in the field of view of the image sensor. Then, the position of the sun image is captured by the image sensor. After that, we can find the coordinates of the sun spot in the field of view through image binarization processing. According to the number of steps of stepper motor rotation which is calculated by the deviation of coordinates, the controller drives the biaxial photosensitive (PV) array tracking device, making the sun spot always fall in the centre of the image. Tests show that the elevation angle and azimuth angle of the tracking range of the photovoltaic array are both 0～270°.The average tracking error of elevation angle is less than 0.7°, and the average tracking error of azimuth angle is less than 0.5°.
Development of the Handwritten Numeral Recognition Based on Neural Network via Kinet Sensor
Authors: Sheu Jia Shing , Shou Ho Nien , Huang Ya Ling
Published: June 2013

Purpose of this paper, coupled with Kinect controller, utilizes handwritten recognition for digit home interactive TV channel controlling. The results of this paper are divided into three parts. The first part presents the development of handwritten digit rules and operations environment using Principal curves method. The second part shows the skeleton tracking system for features extraction. The third part developes an accomplishment of digit recognition function through neural network. In this system, it enables users to operate video and finishs interactive operation in a more intuitive and friendly way, instead of the traditional button control to achieve interactive effect of human-machine interface.
The Technique of Digital and Sound Wave Applied in the Oral Works
Authors: Chen Jie , Li Xiao
Published: June 2013

This paper explains and demonstrates how to apply the digital technique of sound wave contrast-into foreign oral teaching, using the software of media player and cool edit 2 to acquire the experimenters speech sound waves. The key is to offer the obvious sound wave contrast among the wave of the native speaker, the original and unmodified wave of the oral experimenter and the new wave of the oral experimenter after modifications and teachers instructions, which makes the oral autonomic learning more possible and more scientific. From long wave or short wave, wave trough or wave crest, smooth wave or sharp wave, it can be easily identified the deviations and the weaknesses of the experimenter from the standard during the daily practices so it is necessary to make corrections efficiently. Additionally, experimenter also can observe the improvements frequently, which means this experiment more instructive.
Recording and Restoring the Color Texture and Geometric Information of Cultural Heritage
Authors: Fan Jin Song , An Jun
Published: June 2013

The main approaches currently used for digital preservation of historical architecture heritage are 3D scanning. These approaches have successfully realized the acquirement of 3D shapes of architectural heritages. But due to some critical constrains, they still cannot provide enough support for recording high quality color and texture information so far. In the mean time, large amount of information of point cloud acquired by 3D scanning also create big challenges for data processing and digital content utilization. We adopted an entirely new ways and techniques in the process of digital preservation of ancient buildings in Foshan Ancestral Temple & Donghuali area, which employed High Dynamic Range Image (HDRI), panoramic imaging, photogrammetry measurement to record geometry information together with accurate color texture information of cultural heritage. In addition, some practical applications of digital content were also carried out, which shows a promising future of our methods.
Development of a Mobile Rainfall Simulator
Authors: Si Zhen Jiang , Meng Yan , Huang Yan
Published: June 2013

in order to solve the rainfall simulator single control operation currently used in the experiment of soil erosion. A mobile rainfall simulator was designed. The device adopts a rainfall simulator and Longmen mobile support integration mode, which is controllable and mobile and easy to move. The results show that the equipment is advanced in technology, stable performance, flexible movement, rainfall uniformity high, effective rainfall area is 1.5×4.5m with rainfall intensity ranging from 9.5 to 100mm/h. and to a greater extent meets the needs of rainfall simulation. This rainfall simulator can be used in indoor and outdoor experiment of soil erosion in different slope, which improves the efficiency of utilization of rainfall simulator.
Multiple Digital Watermarking Algorithm Based on DCT and Spread Spectrum
Authors: Chen Xiao Pan , Zhu Xiao Ke , Zheng Shan Shan
Published: June 2013

In order to improve the performance of muti-digital rights protection, a multiple watermarking algorithm based on Discrete Cosine Transform (DCT) and spread-spectrum technique is proposed. First, the host image is divided into subblock and each block is manipulated by DCT. Second, two watermarks are encrypted by Arnold scrambling. Third, the watermarks are modulated by by utilizing two kinds of strategies, and then are embedded in middle frequency coefficients of DCT domain. Experimental results show that the proposed algorithm is efficient to resist traditional signal processing attacks and has better security and robustness, higher capacity.
Design of Universal Signal Processing Machine Based on Multiple DSP
Authors: Jian Yang , Liu Yu Hao , Zhao Xi Jing , Chen Hao Ming
Published: June 2013

With the development and application of technique on high speed digital signal processing, wide bandwidth processing, high-speed data exchanging and flexible interlink structure have been the developing trend of modern high performance signal processing machine. In this paper, one universal signal processing machine is designed based on six pieces of ADSP-TS201 TigerSHARC processors, which owns good characteristics such as: large memory, excellent processing and data-exchanging performance, reconstitution, good expansibility. This signal processing machine adopts 64Bit, 66MHz CPCI bus standard and supports the function of extending processing performance by interlinking multiple boards. The high-speed data-exchanging is realized with multiple channel optical fiber. Furthermore, it owns board-level BIT function.
An Experimental Study of Reduction NOx Emissions by Superfine Pulverized Coal Reburning
Authors: Xu You Ning , Ma Rui , Wang Yang , Li Zhen Zhong , Li Yun , Zhang Xiu Li , Fu Yu Dong
Published: June 2013

An experimental study was conducted of reduction of NOx emissions by superfine pulverized coal reburning in Combustion Research Facility (CRF). Based on the systemically measured temperature distributions and analyzed gas samples, the influence of the attention was paid to the superfine pulverized coal reburning characteristic such as NOx emissions, slag formation conditions and mechanical incomplete combustion losses. Experimental results show that feeding pulverized coal for reburning has little influence on the furnace combustion center and slag formation. However, an increase in mechanical incomplete combustion losses was observed in the experiment. In addition, it was shown that the emission of NOx decreased obviously and the reduction efficiency was in excess of 60% with particle size of reburning fuel of 30.74 μm and the proportion of reburned fuel of 14.84%.
A Wideband DDC Design Using Distributed Arithmetic
Authors: Yan Ji Hong , He Zi Shu , Tang Xiao Hong , Yang Dao Guo
Published: June 2013

In this paper, the technique of distributed arithmetic (DA) and digital down conversion (DDC) are described. Then, an efficient wideband DDC based on polyphase structure with intermediate frequency (IF) bandpass sampling is presented. An optimized distributed arithmetic is used for saving the FPGA multiplier consumption. A design example is given and the FPGA resource consumption saving is discussed also. The corresponding test results demonstrate the effectiveness of the proposed DDC design using distributed arithmetic.
Wideband Beamforming Based on Farrow Structure
Authors: Yan Ji Hong , He Zi Shu , Tang Xiao Hong , Yang Dao Guo
Published: June 2013

In this paper, the principles of digital beamforming (DBF) and farrow structure are presented. Sum-of-powers-of-two (SOPOT) and cut-set retiming are used for saving the FPGA multiplier consumption and improving the running speed of farrow structure. A design example is given and the FPGA resource consumption saving is discussed also. The corresponding test results demonstrate the effectiveness of the fractional delay. With the fractional delay, it’s easy to realize wideband beam steering and digital beam forming.
Research on Feature Extraction for Ultrasonic Echo Signal Based on EEMD Approach
Authors: Yu Jian Ming , Zhang Ze
Published: June 2013

The bonding quality of composite materials have a critical influence on the quality of the product in modern industry, while the current technology can only make judgments on bonding and de-bonding instead of quantitative evaluation of different de-bonding degrees. We present HHT method to extract features of echo signals used for quantitative recognition of bonding quality of thin plates. For the non-stationary characteristic of the ultrasonic echo signal, empirical mode decomposition(EMD) and ensemble empirical mode decomposition(EEMD) are put forward to decompose the signal and calculate its energy torque. The HHT method highlights the time-frequency performance of echo signals effectively. The simulated signals verify that EEMD has more excellent decomposition performance than EMD, that is, EEMD diminishes the mode mixing to some extent generated from EMD decomposition.
Design on a Micro-Grid System without Inverse-Power-Flow Based on Distributed Generation
Authors: Chen Wei Min , Hui Cai
Published: June 2013

Recent years, traditional radiate passive power distribution will become an active power with many medium or small power sources and loads, when distributed generation by new energy (such as wind power or photovoltaic power) are connected to power grid more and more. This change of power distribution brings large harm to security of power grid. This paper proposed a micro-grid system without inverse-power-flow based on distributed generation, which center controller and load controller are deployed, and distribution powers, loads and load controllers are partitioned into different domains connected to micro-grid by controllable switch. The function of main units of micro-grid is discussed; as well as the operation strategy of micro grid based on distributed generation is studied. Finally, the experiment results show the feasibility of the proposed micro-grid system.
Damping Improvement of Power System Oscillations by Using Optimal Coordinated Design between PSS and SVC-Based Stabilizer
Authors: Hussain Ali Nasser , Malek F. , Rashid Mohd. Abdur , Mohamed Latifah , Hussin Nuriziani
Published: June 2013

The large expansion of electrical power systems usually results in problem of low frequency oscillations. Therefore, the conventional Power System Stabilizers (PSSs) used to solve this problem cannot provide an adequate damping of low frequency oscillations. Flexible AC Transmission System (FACTS) damping controllers are available for providing suitable damping for these oscillations. This paper, presents the simultaneous coordinated design of the multiple damping controllers between PSS and SVC-based stabilizer in a single machine infinite bus power system. The coordinated design problem of multiple damping controllers is formulated as an optimization problem. Particle swarm optimization algorithm is applied in order to search optimal controlling parameters by maximizing the objective function based on the eigenvalue. The simulation results for a wide range of operation condition show that the coordinated design able to provide better damping and stability performance.
Research on Prevention of Cascading Failures Based on Time of Vegetation-Related Failure
Authors: Zhang Long Yue , Xian Xian Yong
Published: June 2013

The necessity of research on the vegetation-related failure and its inherent hidden timescale in the cascading failures is attached importance based on the facts of recent blackouts internationally. The dynamic behavior of line sag and the vegetation growth are modeled. The time of vegetation related failure after step increase of the line current due to other disconnect events is calculated considering specified physical circumstances, and it can help operators be aware of the necessary urgency of system crisis. Case studies are made on WSCC-9 and IEEE-24 test system respectively, and the results show the method proposed is able to identify collapse sequences due to vegetation-related failures and corresponding timescales, and make great contribution to the prediction and prevention of cascading failures.
Study on Influence of Temperature on XLPE Cable Breakdown
Authors: Tian Feng , Ma Lin Chao , Su Chao Hua
Published: June 2013

The crosslinking agent (DCP) was added to LDPE.The blend was crosslinked at different process temperature.The breakdown voltage and indurance time of samples prepared under different process were observed. Experiment results showed that the breakdown voltage and indurance time were determined by the crosslinking temperature.They were reduced with the increase of temperature. when the the experiment temperature exceeded 90 degrees.The decline was intensified.
Application of High-Energy Laser in Strain-Hardening of Material
Authors: Lai Zhi Lin , Wang Cheng , He Wei Feng , Zhou Liu Cheng , An Zhi Bin
Published: June 2013

Laser is a coherent, convergent and monochromatic beam of electromagnetic radiation and has wide applications in all walks of life. Surface engineering is one of the applications and contains surface alloying/cladding, surface melting/remelting, surface amorphization and surface hardening/shocking. Laser surface hardening/shocking has been proposed as an effective technology for improving surface mechanical and corrosion properties of metals by inducing a compressive residual stress field. The laser shock processing system with high-energy laser is the key technology for industrial application of surface shocking. The laser shock processing system was described in this paper and the power supply system and the samples gripping and handling system were also introduced. Experiment was conducted by the shock processing system and results shows that high-energy laser has led to compressive residual stress in near-surface regions of 1Cr11Ni2W2MoV stainless steel and improved 1Cr11Ni2W2MoV fatigue life greatly.
Locating Method of Single-Phase Grounding Fault in Small Current Grounding System Based on Distribution Automation
Authors: Zhou Jun , Cao Ke Zheng
Published: June 2013

In case of the arc suppression coil for neutral point grounding of small current grounding system, when single-phase grounding fault occurs, due to the arc suppression coil for fault line of the compensation effect of the zero sequence current, the fault features is not obvious, it can't implement the fault line selection and fault point location. This paper puts forward a method of change fault lines zero sequence current shortly, namely a resistance inductance (RL) series branch parallel in arc suppression coil, the series branch acts on the system shortly and changes arc suppression coil compensation degree temporarily in single-phase grounding fault. The change of zero sequence residual current only appears the loop from the neutral point to the fault point via the fault line, using FTU (feeder terminal units) on lines monitor the change of zero sequence current on each nodes for fault regional location. And prove this theory the feasibility of the by using MATLAB software of system modeling simulation method.
Simulative and Experimental Research of High Isolate High Voltage Pulsed Power Supply
Authors: Yang Jia Zhi , Yang Fei , Yi Sheng Li , Jiang Cun Bo , Fan Xing Ming , Yang Fan
Published: June 2013

A high amplitude, fast rising time, and high isolating strength trigger signal is needed for triggering spark gap switch. A high voltage power supply scheme was verified by means of simulation in this paper. Proper parameters of power supply circuit were selected according to the simulation result. Finally, a pulsed power supply was developed. The experimental results show that a negative pulse with 25 kV isolating strength and 15 kV amplitude can be generated by the power supply, and this generated negative pulse can meet the demand of triggering spark gap switch.
Failure Rate Evaluation of Sensitive Equipment Caused by Voltage Sag
Authors: Zheng Ying , Xie Kai Gui
Published: June 2013

In order to accurately evaluate sensitive equipment failure rate caused by voltage sag, the concept of credibility measure is introduced to measure the uncertainty of equipment failure event. This evaluation measure can avoid the deficiencies containing in classical probability measure which needs a large number of testing samples. The uncertainty of failure event is presented by a fuzzy measure where the membership function of equipment voltage tolerance curve corresponding to the characteristic quantities in the uncertain area was determined by fuzzy statistical and a polynomial fit method. Then the credibility distribution function was determined. The proposed evaluation model of sensitive equipment failure rate caused by voltage sag is developed. Using the practical testing samples, the personal computer (PC) was evaluated by the proposed method. Comparing the proposed method with current methods, the results have shown that the proposed method is proper, correct and credible. This method may be more practicable in practical condition.
Study on the Impact of Layer Number on Stray Inductance of Busbar
Authors: Zhu Yi Feng , Zheng Zheng , Tao Hai Jun
Published: June 2013

In high power converter design, low-inductance busbar connecting DC capacitors and power devices is main concern to improve the quality of the whole power electronics system. This paper analyzes the impact of layer-number on the stray inductance of busbar taking a subway traction converter as example. The method of partial element equivalent circuit and the Q3D software were used to extract the stray inductance. The simulation and experimental results show that the stray inductance of three-layer busbar is lower than two-layer busbar with other same conditions.
Dexterity Analysis of a Surgical Assistant 6-UPS Parallel Robot
Authors: Tian He Qiang , Su Chun Jian , Dai Xiang Yun , Wu Dong Mei
Published: June 2013

A 6-UPS parallel is adopted to complete mating surfaces grinding of the cervical implant prosthesis instead of the manual surgical instruments in robot-assisted surgery cervical disc replacement system. Therefore, the surgical assistant parallel robot end-effector has better flexibility in some continuous space and best movement and force transmission performance on the moving trajectory beyond reasonable structures and enough degrees of freedom of the grinding movement. In this paper, the dexterity of the surgical assistant 6-UPS parallel robot is analyzed. Firstly, the vector construction method is used to solve Jacobian matrix of the surgical assistant 6-UPS parallel robot, and then the linear velocity and angular velocity dexterity indicators are used to analyze the dexterity of the surgical assistant parallel robot. From the results, the parallel robot movement and force transmission performance degrades away from the surgical space and the cervical vertebra grinding parallel robot has best grinding performance near the center surgical workspace of the moving platform.
Application of the Extended Finite Element Method to the Penetration Problem for a Body with Cracks
Authors: Wang Feng , Xu Hui , Yu Jing , Jiang Xi Quan , Yu Long
Published: June 2013

The XFEM makes research within a standard finite element framework and needs not mesh repartition to geometric and physical interface, and it reserves all merits of the CFEM, therefore it is the most effective numerical method to solve discontinuous dynamic problems so far. The crack growth problem was studied in the XFEM computation, and the displacement mode of elements with cracks and fracture criterion were presented. The numerical examples for steel rod penetrating in the aluminum target concluded that the method and program were reasonable and effective. The crack growth discipline of penetration process for metal material was summarized, and it would establish theoretic base for the further application of the XFEM.
Nonlinear PID Control for Industry Robots
Authors: Ding Du Kun
Published: June 2013

A new nonlinear PID control method is proposed to meet the needs of a vertical robot running under a high speed condition, whose joint transfer function changed with the joints position. Firstly, the experimental system has been set up. Then the joints transfer functions can be established. Moreover, the relationship between the PID parameters and joints angle position θ has been set up by the least square method. So the nonlinear PID controller can be obtained. In the end, several testing experiments have been caught out. The result shows that the nonlinear PID controllers have fast respond, which can meet the satisfaction of the robot under a high speed condition.