bluuebunny/crossref_metadata_2025 huggingface dataset:
Expression Patterns, Activities and Carbohydrate-Metabolizing Regulation of Sucrose Phosphate Synthase, Sucrose Synthase and Neutral Invertase in Pineapple Fruit during Development and Ripening
Authors: Zhang Xiu-Mei , Wang Wei , Du Li-Qing , Xie Jiang-Hui , Yao Yan-Li , Sun Guang-Ming
Published: July 2012

Differences in carbohydrate contents and metabolizing-enzyme activities were monitored in apical, medial, basal and core sections of pineapple (Ananas comosus cv. Comte de paris) during fruit development and ripening. Fructose and glucose of various sections in nearly equal amounts were the predominant sugars in the fruitlets, and had obvious differences until the fruit matured. The large rise of sucrose/hexose was accompanied by dramatic changes in sucrose phosphate synthase (SPS) and sucrose synthase (SuSy) activities. By contrast, neutral invertase (NI) activity may provide a mechanism to increase fruit sink strength by increasing hexose concentrations. Furthermore, two cDNAs of Ac-sps (accession no. GQ996582) and Ac-ni (accession no. GQ996581) were first isolated from pineapple fruits utilizing conserved amino-acid sequences. Homology alignment reveals that the amino acid sequences contain some conserved function domains. Transcription expression analysis of Ac-sps, Ac-susy and Ac-ni also indicated distinct patterns related to sugar accumulation and composition of pineapple fruits. It suggests that differential expressions of multiple gene families are necessary for sugar metabolism in various parts and developmental stages of pineapple fruit. A cycle of sucrose breakdown in the cytosol of sink tissues could be mediated through both Ac-SuSy and Ac-NI, and Ac-NI could be involved in regulating crucial steps by generating sugar signals to the cells in a temporally and spatially restricted fashion.
4-Hydroxy-1-methyl-7-(propan-2-yl)-4-azatricyclo [5.2.2.02,6]undec-8-ene-3,5-dione
Authors: Szulczyk Daniel , Struga Marta
Published: July 2012

1-Methyl-7-(propan-2-yl)-4-oxatricyclo[5.2.2.02,6]undec-8-ene-3,5-dione (1) as starting material and hydroxylamine were used for the preparation of the title compound 4-hydroxy-1-methyl-7-(propan-2-yl)-4-azatricyclo[5.2.2.02,6]undec-8-ene-3,5-dione (2). This product was characterized by 1H-NMR, 13C-NMR, MS and elemental analysis.
Screening and Analysis of the Potential Bioactive Components in Rabbit Plasma after Oral Administration of Hot-Water Extracts from Leaves of Bambusa textilis McClure
Authors: Wang Jin , Yue Yong-De , Tang Feng , Sun Jia
Published: July 2012

Bambusa textilis McClure is a traditional Chinese medicinal plant belonging to the Bambusoideae subfamily and used to treat chronic fever and infectious diseases. To investigate the bioactive compounds absorbed in the rabbit blood after oral administration of hot-water extracts from the leaves of B. textilis McClure, a validated chromatographic fingerprint method was established using LC-Q-TOF-MS. Twenty compounds in bamboo leaves and three potential bioactive compounds in rabbit plasma were detected. Of the twenty detected compounds in vitro, fifteen of which were tentatively identified either by comparing the retention time and mass spectrometry data with that of reference compounds or by reviewing the literature. Three potential bioactive compounds, including (E)-p-coumaric acid, (Z)-p-coumaric acid, and apigenin-8-C-β-D-(2"-O-α-L-rhamnosyl)-gluco-pyranoside, were detected in both the leaves of B. textilis McClure and rabbit plasma. Of the three compounds, apigenin-8-C-β-D-(2"-O-α-L-rhamnosyl)glucopyranoside was identified based on its UV, MS, and NMR spectra. This study provides helpful chemical information for further pharmacology and active mechanism research on B. textilis McClure.
Protective Effect of Polyphenols Extract of Adlay (Coix lachryma-jobi L. var. ma-yuen Stapf) on Hypercholesterolemia-Induced Oxidative Stress in Rats
Authors: Wang Lifeng , Sun Jing , Yi Qida , Wang Xuefeng , Ju Xingrong
Published: July 2012

The present study examines the effect of polyphenols extract of adlay (Coix lachryma-jobi L. var. ma-yuen Stapf) (APE) on high cholesterol diet fed rats (HCD). APE was orally administrated by gavage at doses of 10, 40 and 200 mg total phenolics/kg body weight of rats once a day for 28 days. At the end of four weeks, serum triglyceride (TG), total cholesterol (TC), low density lipoprotein cholesterol (LDL-C) and high density lipoprotein cholesterol (HDL-C), and markers of oxidative stress viz., malondialdehyde (MDA), superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidase (GSH-Px) in the serum and liver of HCD and normal rats were assessed and compared. The results showed that administration of APE was significantly effective in decreasing the serum levels of TC, LDL-C and MDA, increasing the serum level of HDL-C and antioxidant capacity. In addition, oral gavage of APE could also increase the antioxidant capacity, CAT and GSH-Px activities in liver. These results suggested that APE exerted a high hypocholesterolemic and antioxidant activities, which might be characterized by a protective effect on cardiovascular health in vivo.
Gastroprotection of Suaveolol, Isolated from Hyptis suaveolens, against Ethanol-Induced Gastric Lesions in Wistar Rats: Role of Prostaglandins, Nitric Oxide and Sulfhydryls
Authors: Vera-Arzave Carlos , Antonio Leticia Cruz , Arrieta Jesús , Cruz-Hernández Gerardo , Velázquez-Méndez Antonio Magdiel , Reyes-Ramírez Adelfo , Sánchez-Mendoza María Elena
Published: July 2012

Hyptis suaveolens is a medicinal plant that is, according to traditional medicine, considered useful in the treatment of gastric ulcers. Although its gastroprotective activity was reported, the active compounds have not been identified. Therefore, the aim of the present study was to identify at least one active compound potentially responsible for the gastroprotective activity of H. suaveolens by using a bioassay guided study with an ethanol-induced gastric ulcer experimental model in rats. The results show that the hexane extract had protective activity (close to 70% when using doses between 10 and 100 mg/kg), and that the compound suaveolol, isolated from this extract, was one of the active gastroprotective agents. This is the first report about the gastroprotective activity of suaveolol. Rats treated with this compound at 3, 10, 30 and 100 mg/kg showed 12.6, 21.3, 39.6 and 70.2% gastroprotection respectively. The effect elicited by suaveolol (at 100 mg/kg) was attenuated by pretreatment with either NG-nitro-L-arginine methyl ester (70 mg/kg, i.p.), a nitric oxide (NO) synthase inhibitor, indomethacin (10 mg/kg, s.c.), a blocker of prostaglandin synthesis, or N-ethylmaleimide (10 mg/kg, s.c.), a blocker of sulfhydryl groups. This suggests that the gastroprotective mechanism of action of this compound involves NO, prostaglandins and sulfhydryl groups.
The Relationship between Zinc Intake and Serum/Plasma Zinc Concentration in Children: A Systematic Review and Dose-Response Meta-Analysis
Authors: Moran Victoria Hall , Stammers Anna-Louise , Medina Marisol Warthon , Patel Sujata , Dykes Fiona , Souverein Olga W. , Dullemeijer Carla , Pérez-Rodrigo Carmen , Serra-Majem Lluis , Nissensohn Mariela , Lowe Nicola M.
Published: July 2012

Recommendations for zinc intake during childhood vary widely across Europe. The EURRECA project attempts to consolidate the basis for the definition of micronutrient requirements, taking into account relationships among intake, status and health outcomes, in order to harmonise these recommendations. Data on zinc intake and biomarkers of zinc status reported in randomised controlled trials (RCTs) can provide estimates of dose-response relationships which may be used for underpinning zinc reference values. This systematic review included all RCTs of apparently healthy children aged 1–17 years published by February 2010 which provided data on zinc intake and biomarkers of zinc status. An intake-status regression coefficient () was calculated for each individual study and calculated the overall pooled and SE () using random effects meta-analysis on a double log scale. The pooled dose-response relationship between zinc intake and zinc status indicated that a doubling of the zinc intake increased the serum/plasma zinc status by 9%. This evidence can be utilised, together with currently used balance studies and repletion/depletion studies, when setting zinc recommendations as a basis for nutrition policies.
Infant Nutrition and Later Health: A Review of Current Evidence
Authors: Robinson Siân , Fall Caroline
Published: July 2012

There is a growing recognition of the need for a lifecourse approach to understanding the aetiology of adult disease, and there is now significant evidence that links patterns of infant feeding to differences in health outcomes, both in the short and longer term. Breastfeeding is associated with lower rates of infection in infancy; in high-income populations, it is associated with reductions in blood pressure and total blood cholesterol, and lower risks of obesity and diabetes in adult life. Breastfeeding rates are suboptimal in many countries, and strategies to promote breastfeeding could therefore confer important benefits for health at a population level. However, there are particular challenges in defining nutritional exposures in infancy, including marked social gradients in initiation and duration of breastfeeding. In recent studies of low and middle-income populations of children and young adults, where the influences on infant feeding practice differ, beneficial effects of breastfeeding on blood pressure, BMI and risk of diabetes have not been confirmed, and further information is needed. Little is currently known about the long-term consequences of differences in the timing and nature of the weaning diet. Future progress will depend on new studies that provide detailed prospective data on duration and exclusivity of breastfeeding together with appropriate characterisation of the weaning diet.
Label-Free Electrochemical Diagnosis of Viral Antigens with Genetically Engineered Fusion Protein
Authors: Heo Nam Su , Zheng Shun , Yang MinHo , Lee Seok Jae , Lee Sang Yup , Kim Hwa-Jung , Park Jung Youn , Lee Chang-Soo , Park Tae Jung
Published: July 2012

We have developed a simple electrochemical biosensing strategy for the label-free diagnosis of hepatitis B virus (HBV) on a gold electrode surface. Gold-binding polypeptide (GBP) fused with single-chain antibody (ScFv) against HBV surface antigen (HBsAg), in forms of genetically engineered protein, was utilized. This GBP-ScFv fusion protein can directly bind onto the gold substrate with the strong binding affinity between the GBP and the gold surface, while the recognition site orients toward the sample for target binding at the same time. Furthermore, this one-step immobilization strategy greatly simplifies a fabrication process without any chemical modification as well as maintaining activity of biological recognition elements. This system allows specific immobilization of proteins and sensitive detection of targets, which were verified by surface plasmon resonance analysis and successfully applied to electrochemical cyclic voltammetry and impedance spectroscopy upto 0.14 ng/mL HBsAg.
Influenza Nucleoprotein: Promising Target for Antiviral Chemotherapy
Authors: Cianci Christopher , Gerritz Samuel W , Deminie Carol , Krystal Mark
Published: July 2012

In the search for new anti-influenza agents, the viral polymerase has often been targeted due to the involvement of multiple conserved proteins and their distinct activities. Polymerase associates with each of the eight singled-stranded negative-sense viral RNA segments. These transcriptionally competent segments are coated with multiple copies of nucleoprotein (NP) to form the ribonucleoprotein. NP is an abundant essential protein, possessing operative and structural functions, and participating in genome organization, nuclear trafficking and RNA transcription and replication. This review examines the NP structure and function, and explores NP as an emerging target for anti-influenza drug development, focusing on recently discovered aryl piperazine amide inhibitor chemotypes.
Un écosystème en évolution rapide. Analyse économique des jeux vidéo
Authors: Simon Jean-Paul
Published: July 2012

Résumé Cet article évalue le poids économique des jeux vidéo à l’intérieur de l’industrie des médias et loisirs (marchés mondiaux, régionaux, par segments). Il décrit sa dynamique et celle de ses différents segments. Il présente les différents acteurs de son réseau de la valeur, leur rôle et poids respectif. Il montre que cette jeune industrie, dont la croissance est la plus rapide au sein du secteur des médias, connaît de plus des modifications rapides de sa structure de marché. Il conclut en s’interrogeant sur la compétitivité de l’Europe dans ce domaine.
Retour sur les game studies . Comprendre et dépasser les approches formelles et culturelles du jeu vidéo
Authors: Zabban Vinciane
Published: July 2012

Résumé Ce texte apporte une lecture compréhensive de quelques débats qui ont agité et fortement contribué à structurer, principalement aux États-Unis et en Europe du Nord, le champ d’études des game studies depuis le début des années 1990. Souvent critiqué et peu investi par les études francophones, ce domaine riche en travaux interdisciplinaires a néanmoins forgé et discuté des concepts qui ont une influence importante sur les recherches contemporaines. Sans prétendre à un état des lieux exhaustif du domaine, le texte pointe les apports autant que les limites des positions formelles et culturelles pour la production scientifique sur les jeux vidéo. Il s’intéresse enfin aux travaux plus récents qui proposent une approche sociale et technique des jeux. Celle-ci pourrait permettre selon l’auteur de saisir à la fois leurs dimensions matérielles et culturelles, sans omettre les spécificités de la forme d’activité sociale qu’est le jeu.
Jouer au laboratoire. Le jeu vidéo à l'université (1962-1979)
Authors: Triclot Mathieu
Published: July 2012

Résumé Le jeu à l’université ou dans les institutions d’enseignement constitue la première période de l’histoire des jeux vidéo. Celle-ci a été largement négligée par l’historiographie existante, en dehors de quelques cas exceptionnels comme Spacewar ou les jeux d’aventure en mode texte. L’objet de cet article est d’élaborer pour la première fois un catalogue des jeux universitaires. Il s’agit non seulement d’écrire une histoire des formes ludiques, mais aussi d’analyser le lien entre ces formes et leur contexte de production et d’exercice. Les jeux vidéo à l’université relèvent d’un « régime d’expérience » spécifique qui se caractérise par un rapport singulier au temps, à la simulation et au code.
Jouer aux jeux vidéo avec style. Pour une ethnographie des sociabilités vidéoludiques
Authors: Boutet Manuel
Published: July 2012

Résumé Partant de trois terrains ethnographiques, l’article propose une observation rapprochée des pratiques de jeu vidéo. Dans l’activité de jeu, au fil des répétitions, se constituent des formes sociales, et plus précisément des styles de jeu. La répétition joue dans les jeux vidéo, comme dans de nombreuses formes populaires, un rôle central. Trois styles sont décrits, à travers leur genèse et leur mise en partage, afin de souligner la pluralité des voies ouvertes à la stylisation. La singularité de ces styles, qui émergent de l’exploration locale de ce qui fait un bon moment, peut laisser ceux qui les découvrent, quand ils paraissent dans l’espace public, surpris, indifférents, choqués, intéressés...
Evaluation Index System on Relationship between Urban Mass Rail Transit and its Surrounding Land Use Based on TOD Mode
Authors: Ding Chuan , Wang Yao Wu , Xie Bing Lei , Lin Yao Yu
Published: July 2012

To establish the evaluation index system on relationship between urban mass rail transit and its surrounding land use based on transit oriented development (TOD) mode, the suitable methods and principles of evaluation index system were analyzed. An evaluation procedure frame was proposed based on data envelopment analysis (DEA) model. Then the evaluation indexes from urban mass rail transit system and land use system selected based on interactive relations between urban mass rail transit and land use under TOD mode.
Dynamic Characteristics and Seismic Response Analysis of Self-Anchored Suspension Bridge
Authors: Zhang Lian Zhen , Chen Tian Liang
Published: July 2012

Self-anchored suspension bridge is widely used in Chinese City bridge engineering for the past few years. Because the anchorage system of main cable has been changed from anchorage blocks to the ends of the girder, its’ dynamic mechanics behavior is greatly distinguished with the traditional earth anchored suspension bridge. This paper studies the dynamic characteristics and seismic response of one large-span self-anchored suspension bridge which is located in China/Shenyang city. Using a spatial dynamic analysis finite element mode, the dynamic characteristics are calculated out. An artificial seismic wave is adopted as the ground motion input which is fitted with acceleration response spectrum according to the Chinese bridge anti-seismic design code. Time-integration method is used to get the seismic time-history response. Geometry nonlinear effect is considered during the time-history analysis. At last, the dynamic characteristics and the behavior of earthquake response of this type bridge structure are discussed clearly. The research results can be used as the reference of seismic response analysis and anti-seismic design for the same type of bridge.
Study on Suspender’s Fatigue Performance of Half-through CFST Arch Bridge due to Vehicular Loads
Authors: Sun Hang , Ma Jun , Yu Bo
Published: July 2012

Due to the repeated action of vehicular loads, fatigue failure of suspenders of half-through arch bridge is main failure type. Usually the stress history of suspender is relevant with the vehicle load, dynamic property of structure and so on. In this paper, the traffic load spectrum investigation of Ha-Tong road is constructed through a 24-hour traffic flow investigation; And the space FEM established to get the stress response；Assume the fatigue performance of suspender as stochastic variable, the stress history of suspender is a stochastic process which changes with time, fatigue reliability analysis model is suggested based on accumulated damage model；Taking YIlan bridge as an example, the study on the effect of suspenders’ length and deck type are carried out. The research method and results can be referenced while designing or evaluating the same bridge type.
Laboratory Study on Properties of Tire Crumb Rubber Modified Bituminous Mixture
Authors: Dong Yu Ming , Tan Yi Qiu
Published: July 2012

Abstract: This paper investigates the laboratory properties of tire crumb rubber modified (CRM) bitumen mixture. Two types of mixtures containing two binders (pen90 bitumen; CRM bitumen) were used to produce Marshall Sample and determine optimum content. Mechanical performances of bituminous mixtures were evaluated by Chinese wheel rutting test (WRT), 3point beam bending test (3P-BBT) at low temperature, indirect tensile Strength test (ITST) at freezing-thawing cycles. Superpave gyratory compactor (SGC) specimens also were prepared for modulus test. Resilient modulus (E) data were obtained by unconfined uni-axial compression test according to the specification of China. Dynamic modulus (E★) data were obtained by Simple Performance Test (SPT). Two temperatures were used at dynamic modulus test. The results indicate that CRM bituminous mixture performs better than referenced bituminous mixture on viscoelastic behavior, rutting resistance, cracking resistance and moisture stability.
Dynamic Characteristics of Rubber Powder Modified Cement Asphalt Mortar
Authors: Li Yun Liang , Ou Yang Jian , Tan Yi Qiu , Lu Ming Yu
Published: July 2012

Cement asphalt mortar (CA) is mainly applied in track system of high-speed railways for vibration attenuation. The impact on dynamics performance of CA with the admixture of rubber powder was studied. The beam specimen made of CA was manufactured for analyzing its vibration frequency and damping characteristics by free attenuation vibration tests. Results showed that there was no big change for fundamental frequency after admixture of rubber powder. However, high order frequency and structural damping increased with the increase of admixture amount. Damping ratio of CA was increased by admixing rubber powder, which can be better for energy absorption and vibration attenuation.
Effect of Styrene Butadiene Rubber Latex on Mortar and Concrete Properties
Authors: Yao Shu Yi , Ge Yong
Published: July 2012

The use of styrene butadiene rubber (SBR) emulsions in concrete has been increasing in concrete construction and repair work due to its benefits to flexure strength, adhesion and impermeability. This research evaluated the influence of different contents (0%, 5%, 10%, 15%, and 20% by cement) of SBR on the mechanical properties and anti-permeability of the paste, mortar and concrete with the same water-to-cement ratio to analysis the SBR on the properties of them. For the mechanical properties, the compressive strength, flexure strength and elastic modulus were studied. The permeability was assessed by total charge-passed derived from rapid chloride permeability test (RCPT), all the samples were prepared and measured complying with the corresponding Chinese Industry Standard. Experimental results showed that the properties of the SBR modified concrete were associated with the corresponding properties of the SBR modified mortar and paste, and their properties changed in the same way with the incorporation of the SBR latex.
Study on Asphalt Pavement Temperature Field Distribution Law in Seasonally Frozen Regions
Authors: Zhang Rui , Tan Yi Qiu , Qu Le Yong , Xu Hui Ning
Published: July 2012

Based on the temperature field data collected from a self-developed pavement system, asphalt pavement temperature field distribution law in seasonally frozen regions was studied in detail. Test data illustrated that: The atmospheric and pavement temperature shows cycle sine rule; Minimum and maximum values of pavement temperature occur at surface, In winter, pavement temperature gradually increases with increasing depth, but has contrary result in summer; As the increase of depth, the fluctuation range of pavement temperature decreases gradually, which lead to the appearance of daily and annual constant temperature point; The max freezing depth appeared at 120cm and there will be freezing core in spring in seasonally frozen regions.
Preparation of Latent Heat Materials Used in Asphalt Pavement and Theirs’ Controlling Temperature Performance
Authors: Bian Xin , Tan Yi Qiu , Lv Jian Fu , Shan Li Yan
Published: July 2012

In order to solve the rutting diseases of asphalt concrete pavement, latent heat materials for asphalt pavement were prepared and its controlling temperature performance was studied. Phase change materials (PCM), which were fitted to thermal environment of road were selected, phase change asphalt, diatomite powder and pottery sand granular composite phase change materials (CPCM) were prepared by three kinds of import modes. The CPCM were chosen by comparing the performance of above mentioned materials. Latent heat asphalt mixture (LHAM) was made by replacing mineral powder and fine aggregate with CPCM. Its controlling temperature ability was tested by temperature monitor system. The results show that, comparing to asphalt mixture, LHAM can reduce the temperature to 8-10°C. Therefore, the LHAM has a good effect on adjusting the road temperature.
Analysis of Tire-Pavement Noise Spectrum of Noise Reduction Dense Asphalt-Rubber Pavement
Authors: Guo Zhao Yang , Shen Guo Hui
Published: July 2012

The types of noise reduction asphalt pavement were summarized such as single layer porous or two-layer porous asphalt pavement, elastic asphalt pavement, optimized surface texture pavement, and universally composable one based on these three types. In Beijing China, it was very drought and short of rainfall, there were large volume of traffic, heavy wheel load and many dirt things on the pavement surface taken by the tires too. So asphalt-rubber pavement was the most common one for noise reduction, which was paved by gap-graded, macrotexture, dense asphalt concrete, belonging to the types of elastic and optimized surface texture noise reduction pavement. And it could reduce tire-pavement noise obviously and had excellent durability, All proved that this types of noise reduction pavement had gone through traffic and climate environment of Beijing well. It had measured tire-pavement noise of asphalt–rubber pavement and stone mustic asphalt pavement in Beijing from 2009 to 2012. This measurement was according to Measurement of close-proximity method，which prepared by international organization for standardization in the year 2000. And the test vehicle was a trailer for measuring tire-pavement noise which met requirements of ISO/CD 11819-2:2000. The factors effected tire-pavement noise spectrum were analysed, such as temperature, speed, age of pavement and so on. It reveals that, The tire-pavement noise sound level could get higher especially higher during the frequency 500Hz~2500Hz in the noise spectrum, while the testing speed increase, or the temperature decrease , or the age of pavement grow. while the frequency lay on the range of higher than 800 Hz, the asphalt–rubber pavement’s noise sound level were lower than the stone mustic asphalt pavement’s one in all situations, and when the temperature decreased from 30°C to 0°C , the low limit frequency decreased from 800Hz to 63 Hz . In order to show the reason , it had tested dynamic modulus and phase angle of the two kinds of pavement materials under different temperature and load frequency with the help of Simple Performance Tester, The result shows that, asphalt-rubber concrete has smaller Phase angle at wide temperature as well as frequency changes, it could be one of the main reasons to explain this phenomenon. It could provide reference for designing, constructing, maintaining and evaluating the noise reduction asphalt pavement.
Effect of Filler on Glass Transition of Asphalt Mastics
Authors: Guo Meng , Tan Yi Qiu , Zhang Lei
Published: July 2012

A study has been carried out of the glass transition of fifteen asphalt-filler mastics in three different filler types. The dynamic mechanical analysis (DMA) and differential scanning calorimetry (DSC) method were used. The results show that DMA method can measure asphalt Tg of asphalt-filler mastics more accurately than DSC; The glass transition temperature measured by DMA is generally higher by 20~40oC than that measured by DSC; The glass transition temperature of the asphalt-filler mastics increase with the increase of the filler volume fraction, and andesite is the most sensitive; When the volume fraction of filler is greater than 0.5, the enhance capability of glass transition temperature of asphalt-filler mastics is in the order of andesite > granite > limestone; while the volume fraction of filler is smaller than 0.2, the enhance capability is in the order of granite > limestone > andesite.
Slow Traffic System Planning Should Pay Attention to Several Issues in Central Area of Cold Region — Take Harbin for Example
Authors: Yao Xu , Zhang Ya Ping , Yang Zhi Chao
Published: July 2012

Starting from the definition of slow traffic system, taking Harbin for example, and by analyzing the characteristics and trip features of slow traffic system in cold region, the paper proposes that the central area should increase the pedestrian streets and underground warm gallery in cold city to improve walking environment in winter. At the same time, the paper puts forward that road cross- section planning and design should emphasis focus on the safety of non-motorized mode, and proposes specific measures, such as setting limited time of non-motorized vehicle lanes, slow integration design of non-motor vehicle lanes and sidewalk.
Risk Factors for the Injury Severity of Fatigue-Related Traffic Accidents
Authors: Wang Lian Zhen , Pei Yu Long , Liu Bo Tong
Published: July 2012

Traffic accidents caused by drivers’ fatigue carry less than one percent of the whole accidents in HLJ Province during the years 2006 to 2008. However, more than forty percent of such accidents accompanied fatalities. Drivers’ fatigue is usually hard to be identified and there are no valid measures that could make real-time detection for it. Accordingly, variables such as drivers’ characteristics, time of accident and whether using seat belt are considered to have close association with the injury severity in fatigue-related traffic accidents. This research focuses on analyzing injury severities of traffic accidents caused by drivers’ fatigue, utilizing stepwise logistic regression method. Potential risk factors such as human, environment, road, and so on, were examined. Driving year, road pavement type, road grade and alignment, terrain, time and type of the accident, streetlight condition, vehicle type, speed limit, the number of vehicles involved, and whether using seat belt are significant factors impacting the injury severity. Identifying the high risk factors influencing the injury severity of fatigue-related accidents helps prevent the occurrence of drivers’ fatigue and improve road safety conditions.
Equilibrium Model of Urban Taxi Service Network Based on the Integrated Service Modes
Authors: Bai Zhu , Wang Jian
Published: July 2012

This paper proposes an equilibrium model of urban taxi services on network to present the impact of the integrated service modes and the influence of the elastic customer demand distribution on taxi network equilibrium. Based on the cruising service mode, the model can describe how occupied taxis and vacant taxis cruise on network to provide services and search for customers by considering both the expected time cost and ride revenue and the elastic distribution characteristic of customer demand. At the same time, the dispatch service equilibrium problem by researching trip mode choice behavior is also considered. The model can then establish the relationship between customer waiting time and taxi search/waiting time by introducing a taxi-customer meeting function. And moreover, in supply-demand equilibrium, a number of performance measures of the taxis market can be obtained, such as the number of cruising taxis, the number of dispatch taxis and the average customer waiting time.
A Review on Intelligent Distribution for Passenger Service Resources in Airport Terminal Building
Authors: Shang Di Fei , Zhang Ya Ping , Cheng Shao Wu
Published: July 2012

Terminals are important resources. They serve as a key role in transportation of people and goods in regional, national, and international commerce. Ensuring scheduled flight security and punctual is a basic requirement of civil aviation. In the premise that existing service resources unchanged, intelligent distribution and dispatch for passenger service resources in airport terminal building is an effective way to solve problems of delays for passengers. To study passenger departure processes in airport terminals, improve their operation, efficiencies, reduce delay, and improve service quality, a research on intelligent distribution for passenger service resources is developed using data integration methods, flow prediction method and intelligent simulation optimization algorithm.
Layout Optimization of Integrated Transfer Hub of Metropolis
Authors: Sun Man , An Shi
Published: July 2012

Integrated transfer hub is the important transportation infrastructure and a passenger distributing center place. While our country integrated transfer hub exist some problems as attaching importance on line construction while despising hub layout. The spatial layout and facility layout is reasonable and imperfect, making low transfer efficiency, traffic bottlenecks, waste of resources. Therefore layout optimization of integrated transfer hub is a problem to solve. Combine with features and running state of transit hub in our country, passenger transport demand is forecasted and the combination forecasting model is constructed based on quadratic. In layout optimization of integrated transfer hub, the optimization method of facility layout is also put forward, building a model with minimum cost as the objective, layout of hub is effectively optimized. While proposing the optimization method, system evaluation is proposed aiming at the method, and three respects including internal benefits, social benefit and environmental benefit are used to evaluate the optimized system.
NL Model on Traffic Mode Split among High-Density Town Cluster
Authors: Wu Shi Mei , Pei Yu Long
Published: July 2012

With urbanization process acceleration in China, traffic travel among cities becomes increasing, and traffic mode split is the key link of traffic passenger flow forecast among cities. In this paper, the concept of high-density town cluster was proposed to analyze the characteristics of development, population composition, and traffic facilities among high-density town cluster. Based on applicability analysis of aggregate model and disaggregate model, survey content of revealed preference (RP) and stared preference (SP), and traffic mode hierarchical division according to average speed, then NL disaggregate model among high-density town cluster was constructed. NL model which was parameter calibrated and validated with DongGuan citizen travel investigation data in 2009 was used to analyze the trend of traffic mode split. The result shows that high-density town cluster, such as DongGuan, are establishing a three-dimensional travel mode set, including high-speed rail, intercity rail, suburban rail, urban rail transit, intercity express bus, car, taxi, and common public transport. With the network of multi-mode rail transit further improving, ratio on choosing the traffic mode of multi-mode rail transit, such as high-speed rail, intercity rail, suburban rail, urban rail transit, increases dramatically.
Preparation of Single-Phase and High Purity Nanophase TiO2 by Microwave Hydrothermal Method
Authors: Chen Zhi Qin , Luo Shan Shan , Zhang Shu Juan , Zhou Ze Hua , Li Wen Kui
Published: July 2012

Preparation of single-phase and high purity nanophase TiO2 powders with small crystallite size were investigated by microwave hydrothermal method. By varying starting materials and reaction condition, four titania powders were prepared. Single-phase and high purity nanocrystalline anatase was obtained by hydrolysis of Ti(C4H9O)4 at 120oC for 3 h, which exhibited granulous and uniformly dispersed, with the average crystallite size of 10 nm. Well crystallized and single-phase rutile was obtained by hydrolysis of TiCl4 first at 120oC for 1.5 h and then at 180oC for 1 h, which exhibited shuttle-like and well-dispersed TiO2, with average diameter of 10 nm, by means of XRD and TEM.
Effects of Ar Gas Pressure on Characterization of Nano-Structured Silver Films Deposited on the Surface of Polyester Fabric
Authors: Huang Xin Min , Wang Qian Wen , Li Yue Li
Published: July 2012

The silver films of nano-structured are prepared by magnetron sputtering on the surface of polyester plain weave fabric,The effect of vacuum pressure on the morphology of the nano-structured silver films,anti-UV and the conductivity of samples deposited with silver films is investigated.Results of experiments show that the surface roughness of silver film with substrate for plain weave fabric is biggest, particle size is largest and particles formed on the surface of films is distinctest when pressure is 0.6Pa,but the conductivity of silver film is optimum when pressure is 0.3Pa; The samples deposited with silver films show better UV absorption, Ar gas pressure has no obvious influence on the samples shielding UV radiation.
Synthesis of Layered AlPO4-5 in Polyacrylamide Hydrogels
Authors: Guo Cun Biao , Han Li , Wang Qin , Wang Jian Feng , Zhan Yu Zhong , Guo Shi Ling , Chen Yi Liang , Zhang Rui
Published: July 2012

Layered AlPO4-5 molecular sieve was synthesized in polyacrylamide (PAM) hydrogels. The sample was produced using synthesis gel with weight composition of 1.0Al2O3 : 1.8P2O5 : 1.2 triethylamine (TEA) : 18.0H2O : 2.2 acrylamide (AM). The synthesized layered AlPO4-5 molecular sieve had an average thickness of 2.5 μm, and each layer was approximate circle with an average diameter of 5 μm.
Research on Fatigue Properties of Grade B Steel Casted by the Resin Sand Process
Authors: Fu Nian Jun , Xie Ji Long , Huang Chang Wu , Teng Yao
Published: July 2012

Fatigue properties are investigated experimentally on grade B steel casted by the resin sand technology in this paper, which aims to study bolsters and side frames of Chinese railway freight cars. To begin with, cracked and non-cracked samples were tested by the group method respectively, and then the two obtained sets of experimental data were separately fitted through the three-parameter model with the conventional method. The influence of dispersion and the sample size on probabilistic evaluation was taken into consideration in terms of the cracked samples, and P (survival probability) -S -N curves as well as confidence limits were estimated. At the same time, by comparing the cracked samples’ median S-N curve with that of the non-cracked ones, we can know that this kind of cracks lower the fatigue strength of grade B steel. At last, the fatigue test that simulated real load conditions indicates that fatigue properties of bolsters and side frames by the resin sand process can meet the work demand in the future.
Research on SAFT Imaging Method of Array Probes in Concrete Structures
Authors: Li Qiu Feng , Huang Pang , Liao Yin
Published: July 2012

Because of the need of rapid detection of internal defects and embedded object in concrete structures, a detecting method with linear array probes is presented here, which is the high-resolution and efficient imaging technique for concrete structures by combining with synthetic aperture focusing technique (SAFT). Firstly, array simulation data are processed to be amalgamated B-scan data of concrete structures according to the structural characteristics of linear array; And then the B-scan data are reconstructed in the light of geometrical relation of ultrasonic path and SAFT; At last, the structural imaging figure are calculated. It can be shown from simulation results that the method is effective, and the embedded object in model can be identified effectively.
Calculation about the Effect of Stress Concentration Coefficient on the Fatigue Properties for Welded Cruciform Joints of 16MnR Steel
Authors: Yu Ying Xia , He Bo Lin , Zhang Xiao Dong
Published: July 2012

Stress concentration coefficient of welded joints has a crucial influence on mechanical properties of welded structures. Geometrical parameters of welded joints seriously affect the stress concentration coefficient. In order to increase the mechanical properties and safety of welded structures, it has great significance for reducing stress concentration coefficient and improving the mechanical properties of welded structures by researching and improving the geometry of welded joints. In this paper, the effect of stress concentration coefficient on the fatigue properties for welded cruciform joints of 16MnR steel was analyzed by using ABAQUS finite element and MSC.Fatigue programe, and the change rule of stress concentration coefficient with the variation of the parameter was studied and the fatigue life changed with the stress concentration coefficient was also researched. The calculation results indicate that reducing the weld tangent line angle θ can effectively decrease the stress concentration coefficient of welded cruciform joints, and the fatigue life of welded cruciform joints can be improved succesfully. In order to obtain the safety welded structures, the true weld tangent line angle θ should be controlled in the angle smaller than 20o.
Study on Improved Computed Tomography Algorithm in Concrete Structure
Authors: Li Qiu Feng , Liu Hong Guang , Ma Hui Cong , Chen Zhen Hua
Published: July 2012

In ultrasonic CT of concrete structure, ray tracing technology based on SNELL principle is far more meet the characteristics of ultrasonic propagation. Inversion algorithm of tomography imaging is to solve large sparse equations. Simultaneous iterative reconstruction technique (SIRT) algorithm solves the problem from the mathematical view. According to engineering application, A improved imaging reconstruction method is proposed in the basis. During the data processing of simulation, the data weighting matrix is introduced to increase the proportion of effective information firstly; And then the units without ray passing through is merged with its adjacent units so that the slow-wave in reconstruction section could be changed smoothly by using unit merger method and ensure high resolution in middle section; And finally the image of CT reconstruction is obtained. Simulation results show that the improved algorithm is effective and could meet engineering requirement.
Finite Element Analysis of Cross Helical Gear Transmission Based on ANSYS Workbench
Authors: Li Hua Jie , Zhao Yun
Published: July 2012

FEA software ANSYS Workbench is used for the static finite element analysis of a cross helical gear meshing model, the stress, strain, and the factor of safety on this model are calculated. Modal analysis with 6 main natural frequencies and vibration shape is conducted and analyzed to study dynamic characteristics of the transmission line. This work provides a reliable reference to design a high reliable system of crossed helical gear transmissions for our new developed tool head in multifunction lathe.
The Research on Modal Analysis and Topology Optimization in Car Clutch Parts
Authors: Zhang Guang Hui
Published: July 2012

In the paper，intrinsic mode of parts clutch were analysised to get their proper frequency. Some parts of the cluch were made the whole flow of the topological optimization， and were carried on to re-design on this foundation providing the reference for the later design.
Research and Application on Automotive Aluminum Bumper Based on Topology Optimization
Authors: Tai Qian , Zhang Xiao Yu
Published: July 2012

Based on the explicit dynamic finite element analysis software, the use of hybrid cellular automata (HCA) as an optimization model, the collision of beams in the aluminum front structure optimization design. The 6061 aluminum alloy before the collision of beams to replace a model of the original steel beams, trolley collision simulation and experimental validation of the results show that the aluminum front impact beams than the original steel before the collision beam quality to reduce by 25% and has a higher flexural strength, low-speed collision, aluminum front impact beams than the original steel system energy absorption increased by 45.6%.
Photo-Degradation of Acid Red 18 by Using TiO2/SO42- Nanoparticles under UV Light
Authors: Wang Jian Feng , Zhao Jin Hai , Liu Xue Xue , Zhang Shou Heng , Wei Dong Yan , Han Li
Published: July 2012

Photocatalyst TiO2/SO42- nanoparticles were synthesized by sol-gel method via hydrolysis of pure titanium isopropoxide in n-propanol and acetylacetone solution. The hydrolysis rate and condensation rate of titanium isopropoxide were controlled by concentrated sulfuric acid. Its catalytic activities on the photo-degradation of acid red 18 which is acid azo dyes were studied experimentally and theoretically. The catalysts were characterized by XRD (X-ray diffraction), IR (infrared radiation), BET surface area and SEM (scanning electron microscope). The effects of various catalytic degradation factors of nanocrystalline TiO2/SO42- were discussed in the present paper, which included solution pH, initial concentration of acid red 18, UV irradiation time and the reaction temperature. The results showed that the photo-catalytic activity of this material was obvious signiﬁcantly when pH is 7.0; degradation temperature is 25 °C and irradiation time is 90 minutes for different concentration acid red 18 solutions.
Raman Spectrometry Study on the Composite of Bamboo Charcoal Pottery
Authors: Zhang Wen Biao , Li Wen Zhu , Yan Guo Qi , Zhang Min , Yan He Xiang
Published: July 2012

In this paper a confocal micro-raman spectrometer was used to study the characteristic change of bamboo charcoal pottery(BCP) during its formation from bamboo-charcoal and clay.The effect of carbonization temperature on the carbon bonds and corresponding modes of vibration was detailedly discussed through analysising raman spectrum of the samples.The results showed that the raman spectra of the samples assumes a typical saddle and have no sharp peak, which belong to the typical spectra of carbon material containing amorphous graphite.BCP was mainly pyrolyzed to aromatic substances at low temperature carbonization stage(less than 973K),but didn't form complete graphite crystallite.At low temperature it is pyrolyzed to generate aromatic component, while at 1073K, it becomes hexagonal planar network aggregate composed of sp3 hybridized C atoms, in this case is shows the structure of microcrystalline graphite.With the rise of baking temperature（973K～1373K）, the valne of R representing disorder began to reduce and the value of La standing for the diameter of microlite started to increase which approves that higher temperature is benefit for the growth of amorphous and the enhancement of graphitizing degree.But BCP was also typical non-graphitizable carbon when heat treatment temperature increased to 1373K.
Intelligent Vacuum-Pumping Detection Device Base on STM32MCU
Authors: Gao Zheng Zhong , Zeng Qing Liang , Li Shi Guang
Published: July 2012

Large centrifugal water pumps are widely applied in various water-supply and drainage systems. The vacuum-pumping is pre-requisite for their start-up so that the intelligent vacuum-pumping detection device utilizing STM32F103 as the main controller was presented to realize the automatic control especially of unattended pumps. A differential pressure transducer was adopted to measure the vacuum degree in pump chamber. Afterwards, an electrical signal of corresponding value was output, and then entered the ADC of STM32F103 after conditioning. The threshold algorithm was introduced for the judgement whether vacuum-pumping had been accomplished. Actual applications indicated this detection device was feasible and reliable, and the judgement algorithm was simply implemented and performed well in practice.
Research on a New Azimuth Control Method for Stratospheric Balloon-Borne Gondola System
Authors: Wang Hong Hui , Yuan Zhao Hui , Wu Juan
Published: July 2012

For a class of non-matching uncertain nonlinear system such as stratospheric balloon-borne gondola azimuth control system, a new robust adaptive multiple sliding mode controller is proposed. In this control method, the virtual and the practical control variables are obtained by designing the multiple sliding modes step-by-step. For avoiding the chattering problem generated by discontinuous input, the traditional sign function is replaced by hyperbolic tangent function. Meanwhile, the CMAC neural network is used to approximate the system uncertainties and the derivative of virtual control input online, which can reduce the conservation of controller parameters design. The system stability analyses show that the control method can guarantee that the output tracking error and slide modes asymptotically convergent to boundary layer. The simulation results show that the controller has higher tracking accuracy, and stronger robust to nonlinear and uncertainty of system, and it also can be applied to other similar non-matching uncertain nonlinear systems.
Term Substitution Theorem in First-Order Fuzzy Predicate System
Authors: Zhao Zheng Bo
Published: July 2012

It has given out term substitution theorem in the system K *. R0-algebra is introduced firstly, and then the fuzzy interpretation of the first-order language. It discusses term substitution theorem in the first-order fuzzy predicate system K *.