bluuebunny/crossref_metadata_2025 huggingface dataset:
Regulation of the hypothalamic-pituitary-adrenal axis by neuropeptides
Authors: Aguilera Greti
Published: October 2011

The major endocrine response to stress occurs via activation of the hypothalamic-pituitary-adrenal (HPA) axis, leading ultimately to increases in circulating glucocorticoids, which are essential for the metabolic adaptation to stress. The major players in the HPA axis are the hypothalamic neuropeptide, corticotropin releasing hormone (CRH), the pituitary hormone adrenocorticotropic hormone, and the negative feedback effects of adrenal glucocorticoids. In addition, a number of other neuropeptides, including vasopressin (VP), angiotensin II, oxytocin, pituitary adenylate cyclase activating peptide, orexin and cholecystokinin, and nesfatin can affect HPA axis activity by influencing the expression and secretion of CRH, and also by modulating pituitary corticotroph function or adrenal steroidogenesis. Of these peptides, VP co-secreted with CRH from axonal terminals in the external zone of the median eminence plays a prominent role by potentiating the stimulatory effect of CRH and by increasing the number of pituitary corticotrophs during chronic challenge. Although the precise role and significance of many of these neuropeptides in regulating HPA axis activity requires further investigation, it is likely that they are part of a multifactorial system mediating the fine tuning of HPA axis activity during adaptation to a variety of physiological and stressful conditions.
Alles in Ordnung!
Authors: Ellinger Tobias , Oettershagen Philip , Laschke Matthias , Hassenzahl Marc
Published: October 2011

Aufräumen ist nicht nur eine lästige Bürde. Die eigene Ordnung vermittelt uns auch das Gefühl von Sicherheit. Die vorliegende Arbeit stellt ein persuasives Konzept vor, das zu einem freudvollen Aufräumen am Schreibtisch motiviert. Konzept, Interaktion als auch die spätere formale Gestaltung adressieren das Erleben von Sicherheit und Autonomie.
Response of Martonvásár maize inbred lines to increased UV-B radiation
Authors: Pintér J. , Pók I. , Janda T. , Szigeti Z. , Marton C.
Published: October 2011

Solar UV-B radiation is generally regarded as an environmental stress factor, causing harm to living organisms by damaging DNA, proteins, lipids and membranes. Increased UV-B radiation may affect plant life directly or indirectly, having an influence on photosynthesis and plant biomass. In many plants, including maize (which is one of the most important crops in the world), exposure to increased UV-B radiation causes the induction of UV-B absorbing compounds (e.g. flavonoids), which act as UV-B screens and reduce the dangerous levels and effects of this radiation in plant tissues and cells.This study aimed to reveal how Martonvásár maize inbred lines (bred under Central European environmental conditions) respond to increased UV-B radiation.
Special considerations of breast cancer treatment in an augmented breast
Authors: Mátrai Zoltán , Gulyás Gusztáv , Tóth László , Sávolt Ákos , Kunos Csaba , Pesthy Pál , Bartal Alexandra , Szabó Éva , Kásler Miklós
Published: October 2011

Breast augmentation surgery involving the use of implants has been one of the most popular plastic surgical procedures for decades. As the multi-million female population who received breast implants ages, the risk of cancer is increasing rapidly, therefore the incidence of malignant disease in association with breast implants will increase as well. Although there is no relationship between tumor development and implants, these cases require special considerations in diagnostics, therapy and follow-up methods. Appropriate multidisciplinary treatment of tumors in augmented breasts corresponding with modern oncoplastic principles can only be accomplished based on adequate oncological, breast and plastic surgical knowledge. Supposing a possible increase of this condition in Hungary, too, authors provide a wide review of the literature on the special oncological and esthetic considerations, for the first time in Hungarian language. Orv. Hetil., 2011, 152, 1679–1691.
Thrombosis of the jugular vein during pregnancy
Authors: Vonnák Eszter , Langmár Zoltán , Sipos Miklós , Pajor Attila
Published: October 2011

Thrombosis of the jugular vein is a rare complication during pregnancy. In most cases the thrombogenic factor was ovarian hyperstimulation syndrome occurred during the process of assisted reproductive technology or inherited or acquired thrombophilia. Authors report a case of jugular vein thrombosis occurred after in vitro fertilization. On the basis of the literature thromboprophylaxis should be indicated for patients who develop ovarian hyperstimulation syndrome, and also be considered for women with inherited or acquired thrombophilia, while undergoing assisted reproductive techniques. Orv. Hetil., 2011, 152, 1703–1706.
Inhibition of c-Jun N-Terminal Kinase Attenuates Low Shear Stress-Induced Atherogenesis in Apolipoprotein E-Deficient Mice
Authors: Wang Juan , An Feng Shuang , Zhang Wei , Gong Lei , Wei Shu Jian , Qin Wei Dong , Wang Xu Ping , Zhao Yu Xia , Zhang Yun , Zhang Cheng , Zhang Ming-Xiang
Published: October 2011

Atherosclerosis begins as local inflammation of arterial walls at sites of disturbed flow, such as vessel curvatures and bifurcations with low shear stress. c-Jun NH2-terminal kinase (JNK) is a major regulator of flow-dependent gene expression in endothelial cells in atherosclerosis. However, little is known about the in vivo role of JNK in low shear stress in atherosclerosis. We aimed to observe the effect of JNK on low shear stress-induced atherogenesis in apolipoprotein E-deficient (ApoE−/−) mice and investigate the potential mechanism in human umbilical vein endothelial cells (HUVECs). We divided 84 male ApoE−/− mice into two groups for treatment with normal saline (NS) (n = 42) and JNK inhibitor SP600125 (JNK-I) (n = 42). Perivascular shear stress modifiers were placed around the right carotid arteries, and plaque formation was studied at low shear stress regions. The left carotid arteries without modifiers represented undisturbed shear stress as a control. The NS group showed atherosclerotic lesions in arterial regions with low shear stress, whereas the JNK-I group showed almost no atherosclerotic lesions. Corresponding to the expression of proatherogenic vascular cell adhesion molecule 1 (VCAM-1), phospho-JNK (p-JNK) level was higher in low shear stress regions with NS than with JNK-I inhibitor. In HUVECs under low shear stress, siRNA knockdown and SP600125 inhibition of JNK attenuated nuclear factor (NF)-κB activity and VCAM-1 expression. Furthermore, siRNA knockdown of platelet endothelial cell adhesion molecule 1 (PECAM-1) (CD31) reduced p-JNK and VCAM-1 levels after low shear stress stimulation. JNK may play a critical role in low shear stress-induced atherogenesis by a PECAM-1-dependent mechanosensory pathway and modulating NF-κB activity and VCAM-1 expression.
Alignment of Nephrology Training with Workforce, Patient, and Educational Needs
Authors: Lane Cathie , Brown Mark
Published: October 2011

Background and objectives

Competency-based training programs focus on the product of training rather than the process with the desired attributes and skills set of the specialist directing the training program. These ideal skills and qualities have yet to be formally identified for nephrology training. The objectives of our study were: (1) to define the attributes of a “high quality” nephrologist from the perspectives of the trainer (nephrologist), trainee, and renal patient and (2) identify components and relative frequencies of nephrologists' work practice.

Design, setting, participants, & measurements

Four substudies were undertaken, utilizing a combined quantitative and qualitative approach: (1) a national nephrology workforce study, (2) in-depth interviews of nephrology patients, (3) in-depth interviews of nephrology trainees, and (4) in-depth interviews of practicing nephrologists.

Results

Patients value good communication skills above other attributes. Nephrologists and trainees identify particular personal attributes, a holistic and evidence-based approach to patient care, and good clinical skills as paramount. Although nephrologists spend most of their time in clinical practice, substantial time is also spent in research, teaching, and administrative work.

Conclusions

For the first time, an evidence-based approach has been used to help define qualities desired in a practicing nephrologist. Along with training and assessment in clinical practice, this research supports nephrology training programs incorporating training in basic interventions, research skill acquisition, administration, and teaching. Training toward high standards in advanced communication and the maintenance of a holistic approach to patient care are necessary.
Serum Erythropoietin Level and Mortality in Kidney Transplant Recipients
Authors: Molnar Miklos Z. , Tabak Adam G. , Alam Ahsan , Czira Maria E. , Rudas Anna , Ujszaszi Akos , Beko Gabriella , Novak Marta , Kalantar-Zadeh Kamyar , Kovesdy Csaba P. , Mucsi Istvan
Published: October 2011

Background and objectives

Posttransplant anemia is frequently reported in kidney transplant recipients and is associated with worsened patient survival. Similar to high erythropoiesis-stimulating agent requirements, resistance to endogenous erythropoietin may be associated with worse clinical outcomes in patients with ESRD. We examined the association between serum erythropoietin levels and mortality among kidney transplant recipients.

Design, setting, participants, & measurements

We collected sociodemographic, clinical, medical, and transplant history and laboratory data at baseline in 886 prevalent kidney transplant recipients (mean age 51 ± 13 [SD] years, 60% men, 21% diabetics). A solid-phase chemiluminescent immunometric assay was used to measure serum erythropoietin. Cox proportional hazards regression was used to model the association between baseline serum erythropoietin levels and all-cause mortality risk.

Results

During the median 39-month follow-up, 99 subjects died. The median serum erythropoietin level was 10.85 U/L and hemoglobin was 137 ± 16 g/L. Mortality rates were significantly higher in patients with higher erythropoietin levels (crude mortality rates in the highest to lowest erythropoietin tertiles were 51.7, 35.5, and 24.0 per 1000 patient-years, respectively [P = 0.008]). In unadjusted and also in adjusted Cox models each SD higher serum erythropoietin level significantly predicted all-cause mortality: HR1SD increase 1.22 and 1.28, respectively. In adjusted Cox models each SD higher serum erythropoietin/blood hemoglobin ratio also significantly predicted all-cause mortality: HR1SD increase 1.32. Serum erythropoietin predicted mortality in all analyzed subgroups.

Conclusions

In this sample of prevalent kidney transplant recipients, higher serum erythropoietin levels were associated with increased mortality.
Organotin(IV) complexes of carboxylic acid derivatives
Authors: Matela Garima , Aman Robina
Published: October 2011

A comprehensive review, >100 references, on organotin(IV) complexes of the carboxylic acid derivatives are presented with special reference to their methods of synthesis, spectroscopic and structural studies and their biological activities. The structures of these complexes are discussed on the basis of IR, multinuclear (1H-, 13C- and 119Sn-) NMR.
The influence of precursor’s composition and concentration on cadmium doped TiO2 film
Authors: Andronic Luminita , Duta Anca
Published: October 2011

The purpose of this article is to emphasize that new nanomaterials offer a number of attractive alternatives for solar energy use in wastewater photocatalysis. The wastewater from the textile industry contains dyes and heavy metals. Thin films of cadmium doped TiO2 (Cd-TiO2) were coated by a doctor blade using TiO2 Degussa P25 and cadmium precursor (cadmium nitrate). The photocatalytic efficiency of cadmium doped TiO2 is strongly influenced by crystal structure, particle size, particle morphology, porosity and doping. The pore size distribution and the roughness analysis have been studied by the atomic force microscopy (AFM) of the thin films. The photocatalytic activity of the samples was tested in Methyl orange and Methylene blue photodegradation. Cadmium doped TiO2 catalyst does not significantly decrease the efficiency of photodegradation processes, and, in some situations, improves dye photodegradation.
Erratum to: ”Selective separation of some ecotoxic transition metal ions from aqueous solutions using immobilized macrocyclic material containing solid phase extraction system”
Authors: Rahman Ismail , Furusho Yoshiaki , Begum Zinnat , Sabarudin Akhmad , Motomizu Shoji , Maki Teruya , Hasegawa Hiroshi
Published: October 2011

The original version of the article was published in Cent. Eur. J. Chem. 9(6) (2011), pp 1019–1026. Unfortunately, the original version of this article contains mistakes in the body of Fig. 1. Here we display the corrected version of the Fig. 1.
Richardson Extrapolation combined with the sequential splitting procedure and the θ-method
Authors: Zlatev Zahari , Faragó István , Havasi Ágnes
Published: October 2011

Initial value problems for systems of ordinary differential equations (ODEs) are solved numerically by using a combination of (a) the θ-method, (b) the sequential splitting procedure and (c) Richardson Extrapolation. Stability results for the combined numerical method are proved. It is shown, by using numerical experiments, that if the combined numerical method is stable, then it behaves as a second-order method.
Fibrinogen and cellular adherability on differently treated titanium as implants
Authors: Fojt Lukáš , Klapetek Petr , Strašák Luděk , Vetterl Vladimír
Published: October 2011

Adsorption of human plasma fibrinogen, osteoblasts, and fibroblasts on differently treated titanium samples as implants were examined in this study. Titanium samples were mechanically polished, chemically etched (with and without surface material loss), and grinded. The main goal of this study is to find the best surface treatment of titanium for its possible use as implants. Atomic force microscopy was used to evaluate the adsorption of human plasma fibrinogen onto the titanium samples. Cell counting was used to determine the adherability of osteoblasts and fibroblasts on the titanium samples. Our preliminary results show that the etched titanium surface with surface material loss is the best surface treatment used in our experiments.
Spontaneous pneumarthrosis of the atlantoaxial joint
Authors: Felasi Mohammad Al , Venail Frederic , Lonjon Nicolas
Published: October 2011

The authors describe the case of a 29-year-old man presenting with left retrooccipital and cervical pain associated with left ear fullness and rhythmic tinnitus. Head rotation movements on the right side and the Valsalva maneuver increased symptoms. A CT scan identified hyperpneumatization of the left temporal bone extending to the occipital bone as well as pneumarthrosis of the atlantoaxial joint. Surgical treatment involving obliteration of the fistula with bone and fat grafts via a computer-aided transmastoid approach was proposed. The surgery resolved all of the patient's symptoms except for the ear fullness. In this case the authors described an original treatment for spontaneous atlantoaxial pneumarthrosis. Long-term follow-up is needed to evaluate the risk of the recurrence of abnormal occipital bone pneumatization and to assess joint function.
Le libéralisme francophone du PLP au MR III. 2004-2011
Authors: Wynants Paul
Published: October 2011

résumé Le troisième Courrier hebdomadaire consacré par Paul Wynants à l’évolution récente du libéralisme francophone couvre la présidence de Didier Reynders. Sous sa houlette, en 2007, les réformateurs francophones remportent une victoire électorale sans précédent. On peut alors penser qu’ils vont réaliser l’objectif de leur chef de file : « Faire basculer le centre de gravité politique en Wallonie ». La réalité sera assez différente. L’échec de la formation d’une coalition « orange bleue », la coexistence gouvernementale difficile avec les socialistes et le CDH, la crise financière lourde de conséquences et la vaine tentative d’intégration du parti LiDé de Rudy Aernoudt mettent le parti à l’épreuve. Les résultats des élections européennes, communautaires et régionales de 2009 sont décevants et le MR est maintenu dans l’opposition en Région wallonne, en Région de Bruxelles-Capitale et en Communauté française. L’autorité du président Reynders s’effrite peu à peu, au point qu’il doit renoncer à la direction du Mouvement réformateur, après un nouveau revers électoral en 2010. Le 14 février 2011, il cède la place à Charles Michel, qui s’est affirmé comme un de ses opposants les plus résolus. Dans la conclusion, Paul Wynants revient sur les caractéristiques du libéralisme francophone : l’expansion par agrégation de différents segments du spectre politique, la souplesse idéologique et une forte personnalisation du pouvoir. Il pointe de la sorte les enjeux auxquels le MR sera confronté sous la présidence de Charles Michel.
Grandeurs et misères de l'allocation personnalisée d'autonomie en France
Authors: Hébert Réjean
Published: October 2011

Le vieillissement de la population et la pandémie de maladies chroniques qui l’accompagne obligent à prioriser le financement des soins à long terme qui deviendront de plus en plus importants. De nombreux pays ayant fait face à cette situation ont mis sur pied un financement public distinct via une assurance universelle couvrant les soins à domicile et en institution comme c’est le cas en France avec l’Allocation personnalisée d’autonomie (APA). À la lumière des comparaisons internationales, nous identifions certaines lacunes de l’APA, notamment : la fragmentation des services, une évaluation qui n’utilise pas un outil suffisamment détaillé et validé, le rôle limité des équipes d’évaluation, l’insuffisance du plan d’aide, un ticket modérateur qui limite l’accessibilité et augmente le reste à charge, les problèmes liés à l’utilisation de l’emploi direct et la diversité importante des sources et des canaux de financement. L’APA mériterait d’être corrigée afin de rendre cette mesure de protection sociale plus performante et d’assurer sa pérennité dans un contexte financier difficile.
Comme tout le monde, et comme personne
Authors: Quentin Bertrand
Published: October 2011

Notre société caricature la vieillesse en la pensant grabataire et surmédicalisée. Ce n’en est pourtant pas l’expérience ordinaire aujourd’hui en France. Les personnes âgées subissent certes un imaginaire social qui dévalorise tout ce qui ne correspond pas à la jeunesse et à la productivité. Mais l’article vise à montrer que la personne âgée a encore et toujours à apprendre de la vie. La vieillesse est un temps où, paradoxalement, notre identité doit encore pouvoir être consolidée face à l’ultime expérience.
À quel âge est-on vieux ?
Authors: Ennuyer Bernard
Published: October 2011

Âge chronologique, âge biologique, âge social, etc., l’âge a de multiples significations et représentations. Ces dernières renvoient d’abord, essentiellement à l’analyse de leur construction sociale et donc au fonctionnement social. Comment et pourquoi notre société classe et catégorise les individus quasi uniquement en fonction de leur âge, telle est donc notre interrogation. Dans une société française qui « vieillit » plutôt bien, mais qui reste, malgré tout, phobique de son vieillissement, « A quel âge est-on vieux ? » est une de ces questions dont la réponse se prête à toutes les manipulations possibles illustrant parfaitement la phrase célèbre de Pierre Bourdieu « l’âge est une donnée biologique socialement manipulée et manipulable ». Ces catégorisations et ces classements par âge qui touchent aussi bien les « jeunes » que les « vieux » sont , pour nous, des facteurs de ségrégation sociale et de réification des individus. L’assignation à « comportement d’âge » est une négation complète de la singularité et de l’essence même de l’être humain. Elle doit être combattue sans relâche !
Donner du temps pour les autres mais aussi pour soi
Authors: Malet Jacques , Bazin Cécile
Published: October 2011

Aujourd’hui, quatre millions de Français de plus de 60 ans sont engagés bénévolement dans une association, voire dans plusieurs. Si l’on élargit l’observation aux autres sphères du bénévolat (dans les écoles, les mairies, les églises, les syndicats ou les partis politiques...), ils sont environ 6,7 millions : soit près d’un Français sur deux âgés de plus de 60 ans ! Soucieuses de jouer un rôle citoyen, utile aux autres, ces personnes engagées produisent du lien social, en même temps qu’elles donnent un sens à leur vie, trouvent un meilleur équilibre personnel, et peut-être même, selon de récentes études, une meilleure santé. Une belle convergence voit ainsi le jour entre une plus grande disponibilité, des volontés altruistes fortes, le souhait d’entretenir son propre épanouissement personnel et les attentes croissantes de la société telles que le soutien aux personnes les plus fragiles, la formation des jeunes, leur accompagnement dans des activités sportives, culturelles ou de loisirs... L’enjeu est fort au plan individuel comme au plan collectif. Il mérite que les pouvoirs publics et les partenaires sociauxle prennent en compte pour accompagner chacun dans cette étape de la vie.
Des technologies qui infantilisent et isolent ou des technologies créatrices de lien ?
Authors: Brugière Amandine
Published: October 2011

Nous savons déjà que nous vivrons plus longtemps, et dans un monde encore plus connecté. Mais avons-nous vraiment réfléchi aux interférences entre ces deux tendances ? Il ne s'agit pas seulement de santé, de dépendance ou de maintien à domicile, mais aussi d'expérimenter d'autres formes d'activités, de relations, de services, de jeux, de projets collectifs qui s'adressent aux seniors comme aux autres, dans une société où cinq générations cohabiteront. Les réseaux numériques collaboratifs ont la capacité de devenir des médiateurs de reliance sociale.
Characterizing Data Discovery and End-User Computing Needs in Clinical Translational Science
Authors: Chilana Parmit K. , Fishman Elishema , Geraghty Estella M. , Tarczy-Hornoch Peter , Wolf Fredric M. , Anderson Nick R.
Published: October 2011

In this paper, the authors present the results of a qualitative case-study seeking to characterize data discovery needs and barriers of principal investigators and research support staff in clinical translational science. Several implications for designing and implementing translational research systems have emerged through the authors’ analysis. The results also illustrate the benefits of forming early partnerships with scientists to better understand their workflow processes and end-user computing practices in accessing data for research. The authors use this user-centered, iterative development approach to guide the implementation and extension of i2b2, a system they have adapted to support cross-institutional aggregate anonymized clinical data querying. With ongoing evaluation, the goal is to maximize the utility and extension of this system and develop an interface that appropriately fits the swiftly evolving needs of clinical translational scientists.
The Setting Method of Matching Coefficient for PSS2B Model of IEEE
Authors: Wang Jun Liang
Published: October 2011

According to the principle of PSS2B model of IEEE, reason for producing reverse regulation for PSS is analyzed. Through analysis of the frequency characteristic, it is put forward that setting power matching coefficient and filter parameters can reduce the influence of antiregulating. The model of simulation is established, which is based on the Matlab. Result of simulation shows that the method is valid. It can make the method of setting PSS parameters more perfect.
Spinning Reserve Optimization Model Based on Bi-Level Programming
Authors: Huang Da Wei , Lei Ming
Published: October 2011

How to determine spinning reserve reasonably in electricity market is one of the key questions which guarantee the security and reliability of power systems. For this issue, based on bi-level programming theory, an optimal model of spinning reserve is established in this paper. In this model the generation cost minimization and the reserve cost minimization are the upper level and lower level optimization object separately, and the network and “N-1”security constraints of the power system are also considered. The determination of reserve capacity and the reliability level are related, and the reserve rate of each unit is determined. And an IEEE-14 nodes test system case is used to demonstrate the feasibility and rationality of this proposed model.
Research on Protection for Distributed Generation Access to Distribution Network
Authors: Shi Tao , Liu Li Jie , Tao Qiong
Published: October 2011

In this paper, a grid-connected model of inverter interfaced distributed generator is built , which is used for researching the different effects on the traditional current protection comparing with the rotating interfaced distributed generator. Different protection schemes are introduced to deal with the different models, and the inverter interfaced model is built on DigSILENT/PowerFactory, Simulation results have verified the validity of the scheme proposed.
Application of Intellectual Shuttle in AS/RS System
Authors: Yu Cai Min , Ge Xiao Lan , Wang Hai Qiao , Qin Hong Yan , Han Xun Mei
Published: October 2011

The Shuttle AS/RS System, which is one kind of crowded, highly effective, quick, safe warehouse memory system, has realized brand-new pattern of crowded memory for the warehouse. This warehouse system includes the steel structure tray shelf, the coordinate hay stacker and the shuttle trolley. The hay stacker transports the goods to the entrance and lays them on the shuttle, the shuttle trolley transports the pallet together with goods to region of shelf memory. This article mainly introduces the Shuttle AS/RS, which includes its structural style and the application characteristic.
Optimal Capacitor Allocation Based on Fuzzy Inference and Fuzzy Multi-Objective Programming in Distribution Network
Authors: Wang Wei , Zhang Ji Liang , Li Bao Yin
Published: October 2011

This paper presents an algorithm using a stepwise programming method to determine the suitable locations for capacitors installations and their ratings in distribution networks. The Voltage and loss reduction capability of nodes are regarded as input indices. The fuzzy inference method is used to obtain capacitor placement suitability of every node. The node having the highest suitability is selected as the compensation node. The energy losses of three time periods and the peak charge are modeled as optimization objective. Fuzzy multi-objective programming is used to determine the proper sizes of the capacitors. Considering the each capacitor rating interaction, the circulation calculation method is used to recalculate the capacitor rating for compensated nodes. The results of test system demonstrate the effectiveness and practicability of the method.
Research on the Formation and Preventive Measure of Scale in the Cooling System of HVDC Converter Valve
Authors: Qian Yi Hua , Zhou Yong Yan , Xu Chong Wu
Published: October 2011

The valve tray is the main device to support the voltage of HVDC. The faults of the cooling system of HVDC converter valve greatly impact the safe operation of the power grid. About 66% of the all faults are valve cold system stoppages which are caused by the electrode scaling, electrode gasket corrosion and the pipes clogged by scale which can lead to poor cooling. The scale was verified to be Aluminum compounds. This paper analyzes the cause of scale formation and offers some proposals to prevent scale formation.
Study of Rough Set-Based Taste Signals Identification
Authors: Sun Ying Juan , Sun Ying Hui , Pu Dong Bing
Published: October 2011

This paper gives a new method of rough set-based on taste signals identification. Further improve the identification accuracy by dividing regions more appropriate. The simulation data and the latest UCI machine learning taste signal data (Wine Quality) are used to verify the new method, and the new method is compared with other identification algorithms. The results fully show the correctness and effectiveness of the proposed identification method based on rough set.
Research of Battery Fault-Simulation on Primary Electrical Power System
Authors: Zhao Jian Hui , Wang Jing , Li Fan
Published: October 2011

Battery, as one of the important parts in satellite electrical power system, is of a high probability of failure, therefore it is especially important to simulate and analysis. Base on the existing satellite power system simulation platform, this paper analysis on the fault of Low Earth Orbit (LEO) satellites lithium-ion (Li-Ion) battery. Storage battery, battery charge regulator (BCR) and battery discharge regulator (BDR) are modeled and simulated, and the models are built in Matlab/Simulink. The simulation results are realistic, and these models are effective methods for power design and fault recovery.
Study on Simulation and Training System in Intelligent Substation
Authors: Ran Guang Ying , Ji Xiang
Published: October 2011

This paper analyzes the traditional structure and the simulation function of training simulation system in the intelligent substation, put forward a kind of intelligent substation simulation training system, can promote on running personnel training, and utilize effectively of the substation simulation training system.
Numerical Simulation on Temperature Field of CFST Member under Solar Radiation
Authors: He Yan , Ding Man , Zhang Qian
Published: October 2011

In this paper the temperature field of Concrete Filled Steel Tube (CFST) member under solar radiation is simulated. The results show that temperature distribution caused by solar radiation is nonlinear over the cross-section of CFST member, and it is significantly varied with time and sections, the largest nonlinear temperature difference is over 26.3°C.
Study on Direct Torque Control Applied in the Electrical Propulsion Ship
Authors: Zhao You Tao , Liu Yan Cheng , Ren Jun Jie
Published: October 2011

With the development of AC (alternating current )technique, larger power PMSM ( permanent m- agnet synchronous motor ) has been applied in the marine electric propulsion systems. In this paper the imple- mentation of the DTC (direct torque control) systems for a variable-speed 4088kW PMSM in ship electric propulsion systems has been studied. A novel control method using SVPWM (space vector pulse width mo- dulation) was proposed and a SVPWM module was designed. Then a DTC – SVPWM simulation model of PMSM with the load of propeller was found. The simulation results shows that the variable frequency speed regulation system have good response performance in the process of the motor start or speedup and through comparing the simulation results with the experiment data of the PMSM, the validity of the model is verified.
Research and Discussion on Data Processing of the Temperature Rise Test for the Motor Winding
Authors: Dong Gai Hua
Published: October 2011

Motor winding temperature rise test is the most important test that examines whether the insulation material and the production process meet the motor design life or not. Therefore, it is the key to accurately process the temperature rise test data. For a motor, several motors with the same model and the special motor, the paper puts forward the different methods to process the test data. In addition, the paper takes a single phase AC series excited motor for example, and proves that these methods are effective.
Study on Centers of Gravity for Energy Production, Consumption and CO2 Emission in China
Authors: Ning Ya Dong , Zhang Yong Hong
Published: October 2011

Population, economy, energy and environment are the four essential factors of sustainable development. The dynamic variation track, geography center and their inherent mechanism can be described by Gravity center theory. Based on the statistics from 1985 to 2009, centers of gravity for energy production, consumption and CO2 emission in China were studied in this paper. The results showed that centers of gravity for energy production, consumption and CO2 emission in China are changing from north to south. The center of gravity for energy production has a more apparent westward character while the southward character of energy consumption is notable.
High Power Inverter Circuit from GTO to IGCT and its Application on AC Driving Locomotive
Authors: Qu Su Rong , Zhang Zhong Yang
Published: October 2011

IGCT is a kind of new type power electronic device which developed from GTO and IGBT . In this paper, Author based on analysis of the internal structure of GTO, shows how GTO development IGCT through technical methods.Through simulation of its off and on performance, the work curve and comparing results of the two devices are given. Then on two components of the inverter circuits are analyzed and compared. Thinking in large power AC drive locomotive, IGCT inverter is greatly simplifier than GTO inverter circuit, and superior performance,it will become the main converter for AC driving locomotive.
The Application of Improved HHT to Harmonic Analysis and Fault Detection of Power System
Authors: Han Wen Hua , Ren Hai Xia , Chen Xu , Tao Xiao Juan
Published: October 2011

Hilbert-Huang transform (HHT) is a new time-frequency-domain analysis method, which is suitable for non-stationary and nonlinear signals. In this paper, endpoint continuation and ensemble empirical mode decomposition (EEMD) decomposition method are introduced to improve the HHT, which solve the endpoint winger and modal aliasing problem. The improved HHT (IHHT) is used for analyzing the harmonic signal and detecting the fault signal of power system. Simulation results show that IHHT is feasible and effective for harmonic analysis and fault detection.
Applicability of Ground Source Heat Pump in Cold Areas
Authors: Ran Chun Yu , Huang Yan Xiang
Published: October 2011

The essay introduces principles, forms and characteristics of the soil source heat pump system, explores applicability problems of the soil source heat pump system in cold areas, raises several ways to improve technology problems in the actual running of the soil source heat pump, briefly analyzes from the economic perspective in an combination of relevant materials, and points out that the soil source heat pump has certain applicability in cold areas.
Preparation and Characterization of Solid Biomass Fuel from Waste Mushroom Cultivation Bags
Authors: Lin Sheau Horng , Chou Chuen Shii , Fan Chiang Shih Hsun
Published: October 2011

This study investigated the feasibility of preparing the solid biomass fuel from bio-waste material in the waste mushroom cultivation bag (WMCB) and examined whether the decaying carbohydrates due to the fungi present in the bio-waste material of WMCB affects the heating value of the solid biomass fuel. This study involves the following steps: (1) drying the bio-waste material of WMCB and the wood dust of Taiwan Acacia (TA); (2) grinding the bio-waste material of WMCB and the wood dust of TA into the powder GPWMCB and GPTA , respectively; (3) characterizing the heating value of the powder of GPWMCB and GPTA ; (4) solidifying the air-dried powder of GPWMCB (or GPTA ) into a biomass briquette BMBWMCB or BMBTA using the piston-in-mold process; (5) charcoalizing the biomass briquette BMBWMCB and BMBTA into the charcoal briquette CBWMCB and CBTA, respectively, using a home-made mechanical furnace of charcoalization; and (6) characterizing the charcoal yield, the ash and the heating value of the CBWMCB and CBTA , respectively. Both CBTA and CBWMCB inhere the linear relationship between the average heating value and the charcoalization temperature. The RPHV,which indicates the reduction percentage of heating value of CBWMCB,is less than 10%,compared with the heating value of CBTA .
Deposition of Chloride in Two-Phase Flow for the Superheater via Numerical Simulation
Authors: Chen Song Ying , Mao Jun Jie
Published: October 2011

This paper reports the results of a study on the reason for chlorine-induced corrosion in the superheater, the factor of corrsion is caused by the chloride deposit. A three-dimensional model is performed in order to analyse chloride particles deposit in the flue-gas. The use of CFD codes for modeling of two-phase flow, it is important to know whether or not deposition will be present in some sensitive location. The RNG k-ε turbulence model and mixture model are employed in the article. The predicted results show that the volume fraction of particles phase varies along with the flow field. Chloride particles may deposit where the area of high volume fraction. Actually, under the condition of different velocity magnitude, the deposition of chloride particles is existed on the border of the baffle and at the bottom of the vessel.
The Simulation Study of Air Cooler in an Integrated Coal Gasification Combined Cycle System
Authors: Li Yan , Jiang Xiu Min , Wu Jiang , Ren Jian Xing
Published: October 2011

A shell-and-tube heat exchanger which is widely used for the heat recovery of air in a coal gasification system is investigated. FLUENT6.3 software is used and the RNG k−ε turbulence model is adopted for modeling turbulent flow. The porosity rate, the distribution of the resistance and the distribution of the heat source were introduced to FLUENT by coupling the user defined function. The variation of local heat transfer is studied under the effects of the baffles arrangement. The result shows that the porous media model can be applied in shell side of the air cooler in IGCC and the reasonable arrangement of the baffles can decrease the pressure drop with little influence on the heat transfer.
An Unsteady Model for Natural Ventilation with Solar Chimney
Authors: Liu Zhong Bao , Su Ya Xin
Published: October 2011

A one dimensional unsteady mathematical model for predicting the air mass flow rate in a solar chimney has been proposed. The thermal resistance and thermal inertia of both the glass cover and heat absorbing wall were considered in the present model. Crank-Nicolson finite difference numerical method was used to solve the differential equations. The variation of the air temperature in the solar chimney was solved by integrating the controlling equation for the air along the chimney height. Results show the absorber wall reaches its peak temperature 2 hours later with respect to the maximum ambient temperature. The air temperature in the channel varies with the solar radiation in a day and researches its peak value at about 2:00pm. The air mass flow rate increases remarkably with the increase of the channel depth when the solar radiation is higher from 11:00 am to 3:00 pm. The maximum of air mass flow rate occurs at around 2:00pm
Mass Transfer Mechanisms of Weak Base Complex System in Porous Media
Authors: Liu Wei Dong , Sun Ling Hui , Sun Chun Liu
Published: October 2011

The fourteen physical models were filled with oil sand, permeability of 1000 × 10-3μm2, inner diameter of 1.8 cm, length of 80 cm. The experimental temperature is 45 °C. 0.6 PV liquid chemical flooding was injected (weak base, strong base, surfactant, polymer, weak base complex system, strong base complex system), then injection of 2.4 PV water. The concentration of chemical agent was regularly measured. The curve of comparative was designed by the relative concentration of chemical agent vs. production C/C0. The effect of the injection rate vs. a single chemical transport was analyzed in porous media, a single chemical and complex system, and strong base vs. weak base complex system about transport in porous media rule differences. The results showed that the displacement rate affected transport rules in porous media of surfactant, polymer, and strong base. The greater the displacement rate was, the sooner three kinds of chemical agents appeared. The largest the concentration was, the earlier maximum ratio concentration appeared. When the displacement rate was fixed, the maximum ratio concentration for each chemical was greater than that of a single system. For the ASP system, weak base, surfactant and polymer occur chromatography separation. chromatographic separation of strong base system was more evident than the weak base, indicating that the system suitable for weak base ASP flooding.
Exergo-Economic Performance Evaluation of Enhanced Tube under Equivalent Pump Power Consumption
Authors: Wu Shuang Ying , Xiao Lan , Chen Si Min , Guo Feng Hua
Published: October 2011

Based on the first and second laws of thermodynamics as well as exergo-economic theory, comprehensive performance evaluation criterion has been proposed for enhanced tube under the condition of equivalent pump (fan) power consumption, accounting for a variety of factors such as heat transfer, flow and investment costs. Performance evaluation criterion formula, namely, net profit value (NPV) has been derived from the perspective of the exergy recovery. Take spirally corrugated tube as an example, the results show that the exergo-economic performance of the spirally corrugated tube is superior to smooth tube for the range considered in the present study. From the viewpoint of NPV, although NPV of enhanced tube is greater than that of smooth tube, there exist critical values of Re and Nq exceeding which NPV of enhanced tube would be less than zero, showing no engineering significance.
The Design of Coarse and Fine Regulatory Arc Suppression Coil
Authors: Li Ling Ling , Li Feng Qiang , Yang Li Kui , Zhang Yun Long
Published: October 2011

The way of resonance ground of arc suppression coils at neutral point can extinct the grounding arc effectively. Both preset mode and post-set mode have their drawbacks. Thus,a new kind of arc suppression coil combined with coarse and fine adjustment was designed. The coarse adjustment is using turns adjustable arc suppression coils, while the fine adjustment coil is using magnetic bias style. And a control system based on single chip computer was designed to accomplish the auto-turning of arc suppression coils. And the MATLAB simulation on automatic tracing compensations of arc suppression coils proved the feasibility of this scheme.
Investigation on the Combustion Rate of Carbon Particle in Pressurized Oxygen-Enriched Conditions
Authors: Wang Chun Bo , Sheng Jin Gui , Lei Ming , Wei Jian Guo , Ma Xiao Fei
Published: October 2011

The combustion rates of carbon particle in pressurized oxygen-enriched environment were studied. The combustion rates of different diameter carbon particles were calculated in atmospheric as well as pressurized oxygen-enriched conditions. The effects of pressure and particle size on combustion rate of carbon particle were investigated. It shows that the combustion rate of carbon particle rise with the increase of the pressures in pressurized oxygen-enriched and pressurized air conditions. But, the combustion rate of carbon particle change little at higher pressure. When particle size increased from 50μm to 100μm，the combustion rate of carbon particle rising. When the particle size increased to 150μm, the combustion rate of carbon particle changed little.
The Characteristics Evaluation of Swirl Burner Based on the Numerical Simulation
Authors: Liu Ying Jie , Xie An Guo , Liu Feng , Lv Zi Qiang
Published: October 2011

Use the method of Numerical simulation to different operating parameters and structural parameters of blast air swirl burner . On the basis of it, several evaluation indicators of swirl burners were proposed.
Experimental Study on Microstructure of Fly-Ash from Circulating Fluidized Bed Boilers
Authors: Jin Yan , Feng Cui Ying , Liu Juan Juan
Published: October 2011

Circulating fluidized bed (CFB) combustion techniques have been widely used in China. In order to improve CFB boiler performance it is necessary to study on microstructures of fly-ash. With the help of nitrogen adsorption instrument and scanning electron microscopy, the pore structure of fly-ash in circulating fluidized bed boilers are studied by nitrogen adsorption/desorption isotherms of fly-ash, hysteresis loop and pore distribution. The results indicated that different particle sizes of fly-ash in CFB boilers are of similar nitrogen adsorption isotherms, pore types and the pore size distribution, and the most probable pore radius of fly-ash is about 2nm. Adsorption isotherms of fly-ash is the second type, and the macro-porous and meso-porous types are tapered hole, parallel plate slit hole and the ink bottle shape hole. And meso-pore in proportion is the largest. Micro-pores are not discovered in fly-ash from CFB boilers.
Combustion System Optimization of a Gasoline Direct Injection Engine
Authors: Feng Li Yan , Zhang Chun Hua , Tian Jiang Ping , Long Wu Qiang , Li Jun , Li Jin Cheng , Gong Yan Feng
Published: October 2011

With the purpose of optimizing the combustion system of a homogeneous charged gasoline direct injection engine, its working process was simulated with a 3-D CFD software package. The authors investigated the influence of injection timings and combustion chamber shapes on the charge motion, fuel injection and their influence on fuel-air mixture formation. With the comparisons of fuel-air mixture quality and combustion processes between two typical injection timings, the optimal injection strategy was chosen. To further improve the mixture quality, configuration on piston crown was optimized and analysis on mixture formation processes of the new configurations was made. Simulation results indicate that the new configurations have faster fuel evaporation rate and better mixture homogeneity.
Research on Zero Release Closed Cycle Diesel Engine System
Authors: Wang Yun , Zhang Can , Zhang Jin Chuan
Published: October 2011

To reduce exposure and increase concealment, AIP (Air Independent Propulsion) power plant came into being. In a variety of AIP power devices, closed cycle diesel CCD (Closed Cycle Diesel Engine System) AIP system is the most commonly used at present. Drawing on the principle of existing CCDAIP closed cycle diesel, This paper presents a design about Zero Release Closed Cycle Diesel Engine System, which uses oxygen generation device to produce O2 for the fuel combustion by absorbing CO2，in order to realize the truely zero emissions of conventional submarines without exhaust trail. The paper also takes a preliminary exploration of the design.
Experimental Investigation on Atomization Characteristics of a Certain Type of Aero Engine Fuel Nozzle
Authors: Xu Li
Published: October 2011

The atomization characteristics of a certain type of aero engine fuel nozzle are discussed in this paper. The nozzle atomization characteristics have great influence on the combustion efficiency, ignition, outlet temperature field and pollution emissions. The flow characteristics, atomization particle size and distribution under different working conditions are obtained in this paper through the Phase Doppler particle analyzer and laser Doppler velocity system (PDPA / LDV). The test results show that to the dual pressure atomization nozzle, the flow rate range is wide and droplets size decreases with the increasing oil pressure, and tends to stabilize. The test data provide a reliable basis for the pressure atomizing nozzle design and modified.
Preparation and Properties of Sm2Zr2O7 Ceramics for Thermal Barrier Coatings by APS
Authors: Sun Xian Kai , Wang Quan Sheng , Liu Yan Bo , Ning Xian Jin , Wang Can
Published: October 2011

Material of Sm2Zr2O7composition powder was synthesized by coprecipitation method using Sm2O3and ZrOCl2•8H2O as raw materials, and applied as ceramic topcoats of thermal barrier coating (TBC) by atmospheric plasma spraying (APS). The ceramics powder was prepared with proper distribution of particle size about 30-70μm by spray-dried method. Phase analyses revealed that Sm2Zr2O7coatings keeping the single phase with pyrochlore structure before and after the thermal cycling test. The thermally grown oxide at the topcoat-bondcoat interface and the formation of transverse crack were the major factors that lead to the coating failure on thermal cycling.