bluuebunny/crossref_metadata_2025 huggingface dataset:
Controle automático do espectro de gotas de pulverizador hidropneumático em função do déficit de pressão de vapor d'água no ar
Authors: Alvarenga Cleyton Batista de , Teixeira Mauri Martins , Zolnier Sérgio , Sasaki Robson Shigueaki , Rinaldi Paula Cristina Natalino
Published: May 2013

O princípio de fracionamento e o tamanho de gotas são fundamentais para o sucesso do controle fitossanitário. Objetivou-se, com este trabalho, desenvolver e avaliar um sistema automatizado, para controlar os parâmetros do espectro de gotas da pulverização, em função do déficit de pressão de vapor d'água no ar. O sistema de controle automático constituiu-se de um sensor de temperatura e umidade relativa, um microcontrolador, um servomotor e um pulverizador hidropneumático. A pulverização foi realizada em etiquetas de papel hidrossensível, dispostas em suportes de madeira, para diferentes déficits de pressão de vapor d'água no ar. Posteriormente à digitalização e análise das etiquetas, foram selecionadas três pressões de trabalho (633 kPa, 844 kPa e 1.055 kPa), para serem utilizadas no sistema automatizado. Os resultados indicaram que o controlador foi eficiente na manutenção do espectro de gotas da pulverização de agrotóxicos. A automatização permitiu a manutenção do volume de calda, alterando a pressão de trabalho, em função do déficit de pressão de vapor d'água no ar. A pulverização com o sistema automatizado apresentou qualidade do espectro de gotas superior ao sistema manual, à pressão de 633 kPa.
Produtividade de milho cultivado em sucessão à adubação verde
Authors: Lázaro Rafael de Lima , Costa Antonio Carlos Torres da , Silva Keoma de Freitas da , Sarto Marcos Vinicius Mansano , Duarte Júnior José Barbosa
Published: May 2013

A utilização de espécies antecessoras ao milho, capazes de fornecer nitrogênio pela fixação simbiótica ou reciclagem de nutrientes, é importante para a manutenção da produtividade. Este trabalho objetivou avaliar a produtividade do milho cultivado em sucessão à adubação verde. O delineamento experimental utilizado foi o de blocos casualizados, com quatro repetições e os seguintes tratamentos: milho cultivado sobre a palhada de aveia preta, aveia preta + nabo forrageiro, aveia preta + tremoço branco, tremoço branco, crambe, vegetação espontânea e vegetação espontânea + adubação nitrogenada em cobertura. Houve diferença significativa entre os tratamentos, para a produtividade de grãos. O milho cultivado com a utilização de palhada de aveia preta + tremoço branco foi o mais produtivo (10.817 kg ha-1), apresentando rendimento superior e diferindo do milho cultivado sobre palhada de aveia preta, crambe e vegetação espontânea. O uso de tremoço branco, aveia preta + tremoço branco e aveia preta + nabo forrageiro é uma alternativa viável para se obter maior rendimento de grãos de milho, dispensando a adubação nitrogenada em cobertura.
Multiplicação in vitro de plantas juvenis de mamoeiro
Authors: Vidal Francisco Ronaldo , Diniz Josefa Diva Nogueira , Silva Fanuel Pereira da
Published: May 2013

O método de propagação seminífera do mamoeiro (Carica papaya L.) apresenta uma mistura de genótipos com influência marcante nos custos de produção, qualidade e rendimento dos frutos, prevalecendo devido à inexistência de protocolos eficientes de propagação vegetativa. Neste contexto, a cultura de tecidos surge como uma alternativa promissora, pois poderá fornecer aos produtores mudas com sexo definido, alto padrão de qualidade e em quantidade suficiente para atender à demanda comercial, em qualquer época do ano. Este trabalho objetivou desenvolver um protocolo de multiplicação in vitro, a partir de material juvenil de mamoeiro, em dois experimentos. No primeiro, os explantes foram multiplicados in vitro, testando-se as citocininas BAP, 2iP e CIN, nas concentrações de 0,0 mg L-1, 2,5 mg L-1, 5,0 mg L-1 e 10,0 mg L-1, com o melhor desenvolvimento sendo observado para 2iP, sobretudo na concentração de 2,5 mg L-1. No segundo, foi utilizada a citocinina 2iP, nas concentrações de 0,0 mg L-1, 1,0 mg L-1, 2,0 mg L-1 e 4,0 mg L-1, com e sem GA3 (0,0 mg L-1 e 1,0 mg L-1), constatando-se o efeito benéfico do GA3 na multiplicação, especialmente quando combinado com 1,0 mg L-1 de 2iP, sendo observados os melhores resultados para altura, número de folhas e brotações dos explantes.
População de plantas de milho consorciado com Urochloa ruziziensis
Authors: Freitas Roberto José de , Nascente Adriano Stephan , Santos Fenelon Lourenço de Sousa
Published: May 2013

O sistema plantio direto (SPD) é uma técnica sustentável que preconiza a manutenção da palhada na superfície do solo. Entretanto, os resíduos vegetais produzidos pelas culturas comerciais são insuficientes para manter o solo coberto, durante o ano. Assim, o consórcio de milho com Urochloa ruziziensis é uma alternativa viável, que pode aumentar a massa vegetal por área, com consequente aumento na palhada, visando ao SPD. De suma importância no consórcio, a identificação da correta densidade de plantas de cultivo de milho poderá proporcionar incremento no acúmulo da biomassa da planta forrageira, sem prejuízo à produtividade do cereal. Desta forma, objetivou-se avaliar o efeito da população de plantas de milho no desempenho da cultura, com ou sem consórcio com U. ruziziensis. O delineamento experimental foi o de blocos completos casualizados, em esquema fatorial 4x2 (populações de plantas de milho x métodos de cultivo - milho solteiro e consorciado). Avaliaram-se os componentes de produção, produtividade do milho e massa da forragem, sendo que a produtividade de grãos de milho não foi alterada pelo consórcio com U. ruziziensis. Maiores populações de milho (até 80.000 plantas ha-1) proporcionaram redução no número de espigas planta-1 e grãos fileira-1, na espiga, porém, possibilitaram maior produtividade de grãos, na área cultivada. A massa de forragem de U. ruziziensis, em cultivo consorciado com o milho, em safrinha, foi reduzida à medida em que aumentou-se a população até 80.000 plantas ha-1. Na ausência de restrição hídrica, recomenda-se a densidade de 80.000 plantas de milho ha-1.
Tratamento de sementes de alface com soluções aquosas de cério e lantânio
Authors: Barbieri Ana Paula Piccinin , Espíndola Maria Carolina Grigoletto , Menezes Nilson Lemos de , Henrique Daniela Florinda Soares
Published: May 2013

Elementos terras raras, ou lantanídeos, são importantes no crescimento de plantas e podem trazer benefícios à germinação e vigor de sementes, quando incorporados ao tratamento de sementes. Deste modo, este trabalho objetivou avaliar o desempenho inicial de sementes de alface submetidas ao tratamento com cério (Ce) e lantânio (La), bem como a absorção destes nutrientes. Para tal, sementes de alface (cultivar Regina) foram imersas em solução aquosa de Ce ou La, em experimentos distintos, nas concentrações de Ce de 0,0 mg L-1; 5,0 mg L-1; 10,0 mg L-1; 15,0 mg L-1; 20,0 mg L-1; e 25,0 mg L-1; e nas concentrações de La de 0,0 mg L-1; 2,0 mg L-1; 6,0 mg L-1; 12,0 mg L-1; 20,0 mg L-1; e 30,0 mg L-1, por uma hora. Foram realizados testes de germinação, primeira contagem da germinação, massa seca de plântulas e comprimentos total, da raiz e da parte aérea. Além disto, determinou-se a quantidade de Ce e La absorvida pelas sementes e plântulas. Concluiu-se que o tratamento de sementes com cério e lantânio não proporcionou aumento na germinação de sementes, porém, estimulou o crescimento de plântulas. Quando estes elementos são aplicados em sementes de alface, na forma de solução aquosa, são absorvidos pelas sementes e translocados para as plântulas.
Resistência de genótipos de feijão-vagem ao ataque de Zabrotes subfasciatus (Bohemann, 1833) (Coleoptera: Chrysomelidae)
Authors: Bottega Daline Benites , Rodrigues Nara Elisa Lobato , Silva Anderson Gonçalves da , Costa Eduardo Neves , Boiça Júnior Arlindo Leal
Published: May 2013

O feijão-vagem (Phaseolus vulgaris L.) pode sofrer ataque de carunchos, como os da espécie Zabrotes subfasciatus (Bohemann, 1833) (Coleoptera: Chrysomelidae), afetando, diretamente, a qualidade das vagens e sementes e deixando-as inviáveis para o consumo e comercialização. A fim de buscar uma alternativa para o controle deste inseto, foram determinados os tipos e graus de resistência, envolvidos em genótipos de feijão-vagem, ao ataque de Z. subfasciatus, em testes com e sem chance de escolha. Os genótipos utilizados foram UEGD7, UEG05, UEG06, UEG11, UEG13, UEG15, UEG18, UEG19 e UEG26, com quatro repetições. No teste com chance de escolha, os parâmetros avaliados foram o número de ovos viáveis, inviáveis e total e a atratividade dos adultos pelos genótipos. No teste sem chance de escolha, foram avaliados o número de ovos viáveis, inviáveis e total, massa seca consumida e massa seca consumida por inseto, massa e longevidade dos adultos, período de ovo a adulto, razão sexual e número e percentagem de insetos emergidos. Concluiu-se que o genótipo UEG05 foi o menos preferido por Z. subfasciatus, para oviposição, em teste com chance de escolha. O UEG13 foi altamente resistente e UEG05, UEG15 e UEG19 foram moderadamente resistentes. O UEG18 foi susceptível e os demais genótipos foram altamente susceptíveis a Z. subfasciatus.
Briefing: University choices – parental influence on prospective students
Authors: Paul Parneet
Published: May 2013

It has been recognised for quite a while that parents/guardians of prospective undergraduates in the civil engineering sector are having a greater say in their children's eventual university and course selection. Introduction of the new fees regime in the academic year 2012/13 will probably exacerbate this situation as higher education is gradually seen by all stakeholders as any other long-term investment with an anticipated outcome. This briefing note investigates possible trends in this area, and discusses possible ramifications for UK university civil engineering departments and the wider industry. Some recommendations are suggested based on the early research work carried out at Brunel University.
Containment evaluation against ground shock in rock
Authors: Iqbal Javed
Published: May 2013

Structures, systems and components that are essential for the safe operation and shutdown of a nuclear power plant may be subject to a variety of impulsive loads. This paper presents an experimental and numerical evaluation of the influence of ground shock and airblast forces on the structural response of a 1:8 scale reactor containment structure founded on schist. The numerical model, including both free air and schist properties, was programmed and linked to finite-element software as its user-provided subroutines. The numerical and experimental scaled model results demonstrate good agreement with each other. The full-scale simulation of typical reactor containment was subjected to surface explosions through the developed relationship for structural response analysis. The proposed methodology can be employed to evaluate the blast response of a concrete shell type containment structure and to estimate the integrity of containment.
Decision support system design for rail transport of hazardous materials
Authors: Zhao Rui , Liu Dan , Li Qibin
Published: May 2013

This paper describes a decision support system for transportation of hazardous materials by railway in China in order to reduce the serious consequences resulting from sudden environmental-pollution accidents. Transportation management of hazardous materials and consequent environmental risk are incorporated into the design approach for the system structure and functional framework. Moreover, management information system and geographical information system techniques are integrated for the development of system-functional modules within the decision support system. This paper mainly focuses on the datasheet construction in terms of management information system design, as well as the mathematical models applied to geographical information system buffer analysis. On completion of the system design and construction, selected functionalities of each sub-module are demonstrated. The limitation of the decision support system is also discussed, which lays a foundation for further development.
Shared space – research, policy and problems
Authors: Moody Simon , Melia Steve
Published: May 2013

Shared space is an approach to street design which minimises demarcations between vehicles and pedestrians. It has become particularly influential in the UK, where a comprehensive study of shared space schemes has informed recently published national guidance to local highway authorities. This paper critically examines the claim made in the guidance that it is ‘evidence based'. Primary research reported in the paper examines one of the sites in the ‘official study' in Ashford, Kent, in greater depth, using video observation and a street survey of pedestrians. The findings show that most pedestrians diverted away from their desire lines, gave way to vehicles in most cases and felt safer under the original road layout. This evidence, and the analysis of the ‘official study', cast doubt on some aspects of the methodology and its interpretation in the national guidance. The authors conclude that some of the claims made on behalf of shared space have overstated the available evidence, and that caution is needed in implementing shared space schemes, particularly in environments of high traffic flows.
The impact of wind turbine traffic on highways in Texas, USA
Authors: Banerjee Ambarish , Prozzi Jolanda , Prozzi Jorge A. , Buddhavarapu Prasad
Published: May 2013

This paper proposes a methodology for assessing the damage imposed by the movement of wind turbine components on Texas's highway infrastructure. The damage to the pavement structure was estimated using three primary distress mechanisms – rutting, longitudinal and alligator cracking – and also roughness. The extent of the damage to the pavement structure was evaluated using the Mechanistic Empirical Pavement Design Guide (MEPDG). The methodology adopted involved calculating the pavement distress due to the combined effect of the wind turbine and the design traffic relative to that due to the design traffic only. This ensures that biases in the distress predictions obtained from the MEPDG will mutually cancel each other out in each of the two scenarios. It was observed that the pavement damage in the case of Interstate and US highway sections was roughly 0·3% and 4% higher, respectively, irrespective of the distress mechanism. However, the pavement damage due to wind turbine truck traffic on state highways had a more serious impact than in the higher functional classes. The additional damage imposed by the wind turbine truck traffic will translate into a reduction in pavement service life that is estimated at 9%.
Predictors and Characteristics of Successful Aging among Men: A 48-Year Longitudinal Study
Authors: Westermeyer Jerry F.
Published: May 2013

To explore dimensions of successful aging, 71 men were selected for healthy adjustment and were prospectively studied in young adulthood (average age 20) and reassessed in 32-year and 48-year follow-ups. Despite an increase of medical problems, most men maintained healthy adjustment in early old age. At both follow-ups, successful young adult predictors of favorable overall outcome included good peer social adjustment, an absence of troubled parental discipline, and an absence of immature defensive behaviors when angry. However, young adult factors were more predictive of outcomes in middle age than in early old age, as predictor effect sizes decreased between the first follow-up and the second follow-up 16 years later. Findings support the possibility of both favorable and unfavorable changes in the second half of life that may diminish the impact of some young adult characteristics and family environments on adjustment in early old age.
Promoting and Assessing Pre-Service Teachers' Technological Pedagogical Content Knowledge (TPACK) in the Context of Case Development
Authors: Mouza Chrystalla , Karchmer-Klein Rachel
Published: May 2013

This study investigated the extent to which case development allowed preservice teachers to recognize the interactions and integration of technology with content and pedagogy in their own practice. These interactions form the core of what has been called Technological Pedagogical Content Knowledge (TPACK), a distinct type of knowledge required for effective use of technology in classroom teaching. Data were collected from 58 pre-service teachers in the context of a teacher education program in the United States. Results indicated that case development provided a fruitful context for helping pre-service teachers bring together different knowledge bases to design and implement effective technology-integrated lessons.
Central Component Descriptors for Levels of Technological Pedagogical Content Knowledge
Authors: Niess Margaret L.
Published: May 2013

Technological pedagogical content knowledge (TPACK) proposes a theoretical framework that incorporates four central components: an overarching conception of what it means to teach with technology, knowledge of students' thinking and understandings of specific topics with technologies, knowledge of curricular materials that incorporate technologies, and knowledge of instructional strategies and representations for teaching subject matter with technologies. This interpretive case study, conducted over a 3-year period, identified descriptors aligned with the four central components of TPACK to highlight differences in teachers' knowledge levels when integrating spreadsheets as learning tools in mathematics.
Does a Copycat Effect Exist in the Emergency Department?
Authors: Kim Woo Jung , Song Youn Joo , Namkoong Kee , Kim Jae Min , Yoon Hye Jin , Lee Eun
Published: May 2013

Objective:

This study aimed to examine the copycat effect of a famous actress's suicide on suicide attempts visiting the emergency department (ED) in Korea.

Method:

We retrospectively reviewed the medical records of suicide attempt cases which had visited the EDs of two general hospitals during the 6 months before and after a celebrity suicide. We obtained data pertaining to demographics, history of psychiatric illnesses and suicide attempts, method of the suicide attempts, discharge status, and follow-up compliance.

Results:

We identified 319 cases during the study period, of which 158 cases occurred before the celebrity suicide, and 161 occurred after the event. Following the celebrity suicide, suicide attempts with the similar age and the same method as the celebrity's suicide (hanging), presence of psychiatric history, and use of intensive and multiple methods increased. We observed that suicide attempts with the similar age and the same method of hanging were consistent with a copycat effect. Despite a decrease of discharge against advice (DAA) after the celebrity's death from 67.7% to 59.6%, DAA was still high, and the follow-up compliance at outpatient clinics was less than 50%.

Conclusions:

A copycat effect was found in ED-visiting suicide attempts. Prevention of re-attempts should be initiated in the ED. A specific action guide should be established for suicide attempts in the ED, including cooperation between other hospitals, the community, and the media.
Bifidobacterium breve B-3 exerts metabolic syndrome-suppressing effects in the liver of diet-induced obese mice: a DNA microarray analysis
Authors: Kondo S. , Kamei A. , Xiao J.Z. , Iwatsuki K. , Abe K.
Published: May 2013

We previously reported that supplementation with Bifidobacterium breve B-3 reduced body weight gain and accumulation of visceral fat in a dose-dependent manner, and improved serum levels of total cholesterol, glucose and insulin in a mouse model of diet-induced obesity. In this study, we investigated the expression of genes in the liver using DNA microarray analysis and q-PCR to reveal the mechanism of these anti-obesity effects in this mouse model. Administration of B. breve B-3 led to regulated gene expression of pathways involved in lipid metabolism and response to stress. The results indicate that these regulations in the liver are related to the anti-metabolic syndrome effects of B. breve B-3.
Greater Trochanter Osteotomy With Cementless THA for Crowe Type IV DDH
Authors: Lei Pengfei , Hu Yihe , Cai PengDe , Xie Jie , Yang XuCheng , Wang Long
Published: May 2013

This study explored the surgical method and short-term clinical effect of a greater trochanter osteotomy along with cementless artificial total hip arthroplasty in the treatment of Crowe type IV developmental dysplasia of the hip. The authors conducted a retrospective analysis of 18 patients (22 hips) with Crowe type IV dysplasia who were seen between June 2008 and August 2010. After undergoing cementless artificial total hip arthroplasty using a posterolateral approach, a greater trochanter osteotomy was used to adjust the tension of the gluteal muscle, and an acetabular cup was placed.

Average preoperative length shortening of the affected limb was 4.5 cm (range, 3.4–6 cm), and average postoperative length increase was 4.0 cm (range, 3.2–4.8 cm). Average postoperative Harris Hip Score was 87 (range, 79–91), which was higher than the average preoperative score of 38 (range, 32–51). Intraoperatively, 3 hips (3 patients) sustained a proximal femur fracture. Due to the stability of the femoral prosthesis, either no treatment or wire fixation only was given; by 2 months postoperatively, radiographs indicated that all fractures had healed. One patient had symptoms of sciatic nerve paralysis that resolved 3 months postoperatively.

Performing a greater trochanter osteotomy after cementless artificial total hip arthroplasty is effective for the treatment of Crowe type IV dysplasia and can rebuild the complex biology and biomechanics of hip dysplasia without increasing the complication risk.
Extensive Subcutaneous Emphysema Resembling Necrotizing Fasciitis
Authors: Kamal Robin N. , Paci Gabrielle M. , Born Christopher T.
Published: May 2013

Necrotizing fasciitis is an aggressive, invasive soft tissue infection. Because it can rapidly progress to patient instability, prompt diagnosis followed by urgent debridement is critical to decreasing mortality. Despite the importance of early diagnosis, necrotizing fasciitis remains a clinical diagnosis, with little evidence in the literature regarding the effectiveness of diagnostic tools or criteria. Common clinical findings are nonspecific, including pain, blistering, crepitus, and swelling with or without fever and a known infection source.

This article describes a patient who was transferred to the authors’ institution from another hospital, where she had been taken following seizure activity and was treated with antibiotics for suspected cellulitis at the intravenous catheter placement site on her left dorsal hand. On admission to the current authors’ institution, she presented with pain and swelling in the setting of significant left upper-extremity emphysema. She had undergone a left shoulder arthroscopy 4 weeks previously. Vital signs were within normal limits, and a preoperative chest radiograph was read as normal. The patient underwent an emergent fasciotomy, irrigation and debridement of the left upper extremity, and intravenous antibiotics for suspected necrotizing fasciitis. Intraoperative findings indicative of infection were absent, and a left apical pneumothorax was later found on postoperative chest imaging.

In a stable patient with a normal chest radiograph on presentation who demonstrates upper-extremity crepitus suspicious for necrotizing fasciitis, a chest computed tomography scan may be indicated to rule out an intrathoracic source.
Study of Alternative Raw Materials Parameters for Modification of Cement-Bonded Particleboards Composition
Authors: Melichar Tomáš , Bydžovský Jiří , Keprdová Šárka
Published: May 2013

The cement-bonded particle boards can be used among other also with reconstructions of various types of buildings as a part of final surface treatment. The paper deals with partial results of the research focused on optimisation of cement-bonded particle board composition with alternative raw materials. Specifically it is analyzing of basic parameters of the waste originating during processing (modification of surface format and quality) of the boards. Upon results and findings a design of new formulas of cement-bonded particle boards is mentioned further, i.e. the composition modified with above stated waste. The outputs presented in the article form an important initial information source in the solved questions. In view of subsequent phases of the research it is a relatively essential and also it can be said a key phase.
A Study on the Application of a Low Viscosity Epoxy Resin Curing System
Authors: Peng Yong Li , Liang Yi , Huang Chi , Wang Zui Han
Published: May 2013

Two novel low viscosity polyamide curing agents are prepared, the viscosity of the polyamide-1 synthesized from adipic acid and tetraethylene pentamine is 12240mPa·s and that of the polyamide-2 synthesized from dimenthy tetrphthalate and tetraethylene pentamine is 11800mPa·s. The effect of synthetic polyamide content on the mechanical performance and thermal performance of the epoxy curing system is studied. The results show that overall performance of the curing system first increases and then decreases with the increase of synthetic polyamide content and reaches maximum with 33 wt% of polyamide. The tensile strength, flexural strength and impact strength of polyamide-1/CYD-128 are 32.41MPa, 81.55MPa and 19.6KJ/m2, respectively. While that of polyamide-2/CYD-128 are 37.88MPa, 104.60MPa and 16.5KJ/m2, respectively. This low viscosity curing system can be used as building adhesives due to its excellent mechanical properties.
Research on Using Sludge to Manufacture Lightweight Ceramsite and Sintering Mechanism
Authors: Liu Ya Dong , Yang Ding Yi , Wang Le Le
Published: May 2013

Abstract. Lightweight sludge ceramsite was manufactured using dewatered sludge from municipal sewage treatment plants as the main raw material, complemented by fly ash and clay ingredients. The results indicate that the sintering temperature on the ceramsite’s performance impacts the most. Sludge ratio has certain influence on the bulk density of sludge ceramsite. The ratio of sludge in the experiment can be up to 80% and meet the requirements of the light weight
Urban Building Energy Consumption Forecast Based on the IPAT Theory
Authors: Zou Cui , Liu Xiu Li
Published: May 2013

This paper established an urban building energy consumption model based on IPAT theory combined with ARMA method. Applying the model, the paper calculated the urban building energy consumption in different scenarios, and then predicted the amount of urban building energy consumption in China during 2011-2015. The amount of Chinese urban building energy consumption would grow rapidly during this period, and would reach about 895 million tons of standard coal in 2015. Results analysis showed that it would be necessary to promote energy- efficiency measures in urban buildings, especially in the public buildings.
Effect of Wet Storage on High Yield Pulping with H2O2-CoSO4
Authors: Shang Zhen , Sun Bing , Liu Yu Xin , Li Hong , Zhu Ren Chao , Bao Li
Published: May 2013

In this paper, the effect of residual chlorine of hypochlorite (H) on high yield pulping with H2O2/CoSO4of wet stored bagasse was studied. Compared with control sample, the pulp of the bagasse wetstored with H or Ho (without residual chlorine) bleaching waste water had better pulping yield and strength, but the pulp optical property was lost seriously. If it had no requirement on the brightness, the wet storage with H or Ho bleaching waste water was a good method to improve the pulp strength and save clean water. In addition, the wet storage of bagasse using the H bleaching waste water without residual chlorine, the pulping properties was more stable than that of the wet storage using H bleaching waste water with residual chlorine. To the wetstorage with Ho bleaching waste water, the ideal treatment time was 16day.
Study on Hydrophobic Microorganism as Coal Bio-Desulfurizing Agent
Authors: Zhang Dong Chen , Hou Zhi Xiang , Wang Tao , Zhou Qian Qian
Published: May 2013

Mycobacterium phlei belongs to protozoa,it is innocuous and it doesnt have any pathogenicity to all animals.Base on research of the biologic character of the hydrophobic microorganism and analysis of the FTIR spectrum and so on.Experiment results indicated that the surface of Mycobacterium phlei contains cyclanes,alicyclic hydrocarbon,aromatic nucleus and many kinds of organic function group and ionizing group so it was highly hydrophobic and highly charge.Because of this special biology surface character,Mycobacterium phlei may selective adsorption on the surface of coal and make coal form flock,and meanwhile effectually get rid of pyritic sulfur in coal.The Experimental effect of the Mycobacterium phlei on the getting rid of pyretic in the coal was obvious.The maximum pyrite desulphurization rate was reach to 72.63%,but the desulphurization percentage of organic sulfur was lower.The desulphurization rate was only 18.91%.
Synthesis and the Study of Oil Displacement Performance of Stearate-2-Hydroxy-3-Propane Sulfonic Acid Sodium Salt
Authors: Hao Yu Lan , Wang Jiao Yang , Zhang Rong Ming , Ma Zhong Bao
Published: May 2013

The stearate-2-hydroxy-3-propane sulfonic acid sodium salt was synthesized by using sodium bisulfite,epichlorohydrin,sodium phosphate and stearic acid.The influence factors on reaction temperature, reaction time ,the amount of catalyst and reactant molar ratio and so on to the yield were investigated.The favorable conditions of synthesizing were determined:Epichlorohydrin was dropped into the solution of sodium bisulfite of 85°C,the dropping 2h and keeping 1.5h. 3-chlorine-2-hydroxy-propane sulfonic acid sodium was synthesized. 3-chlorine-2-hydroxy-propane sulfonic acid sodium was dropped into the solution of sodium phosphate at 55°C and 4h reaction time.The 2,3-oxiranemethane sulfonic acid sodium salt was synthesized. reactant molar ratio: 1:1.1，2,3-oxiranemethane sulfonic acid sodium salt solution was dropped into the solution of stearic acid of 90°C,the dropping 0.5h and keeping 2.5h . Stearic acid-2-hydroxy-3-propane sulfonic acid sodium salt was synthesized. The yield was 85.1 %.The product was characterized by FTIR. The surface tensions of the surfactant product water solutions were determined, The critical micelle concentrations of 4.62mmol/L were obtained.Artificial core physical simulation flooding experiments was developed.the flooding efficiency of the surfactant is about 12.21%.
Dyeing of Cotton Fabric Modified by 2, 3-Epoxpropyl Triethyl Ammonium Chloride with Reactive Dyes
Authors: Liang Hui , Zhang Guang Xian , Zhang Feng Xiu , Xue Xu Ting , Zheng Hui
Published: May 2013

In order to improve the dyeing property of cotton fiber, in this paper, the cotton fabric was modified by 2, 3-epoxpropyl triethyl ammonium chloride (ETEAC). Four reactive dyes were employed to test the dyeing property of modified cotton fabric. The results showed that the dyeing property of cotton fabric was improved greatly. When the concentration of ETEAC was equal to or above 7%, most of the dye-uptake rate of the modified cotton fabric could reach to nearly 100%. And the dyeing rate was very high. These suggested that the cationic groups with three ethyls could attract anion dyes efficiently, though the cationic groups with three ethyls were greater than cationic groups with three methyls. The modified cotton fabric could not be dyed uniformly. Sodium dodecyl sulfate (SDS) was efficient retarder for the modified cotton fabric.
Synthesis and Properties of a Castor Oil-Based UV-Oligomer Comprising of Side-Chain Benzophenone
Authors: Fu Chang Qing , Yang Zheng , Lu Zong Xiang , Shen Liang
Published: May 2013

A castor oil-based UV-oligomer bearing benzophenone side chains (LU-5)was synthesis through two-step partial esterification reaction of polyacrylic acid with 4-hydroxy benzophenone and castor oil in the presence of N, N-diisopropyl carbodiimide and 4-(dimethylamino) pyridinium 4-toluenesulfonate(DPTS), then LU-5 was cured by UV irradiation with trimethylolpropane triacrylate(TMPTA) without any photoinitiator. The structure of the productions of the esterification reaction was characterized by Fourier transform infrared spectroscopy (FT-IR), nuclear magnetic resonance(NMR) and ultraviolet and visible spectrophotometer (UV-Vis), and the properties of UV cured polymer(FUV) has been studied. The results show that LU-5 has a certain light initiator activity, and it can be used as a macromolecular photoinitiator, the film of polymer has a certain degree of crosslinking.
Hydrogen Induced Modifications of Optical and Electric Properties in Mg Thin Films
Authors: Cao Guan Ying , Fang Fang , Zou Ai Ling , Zhang Jing Hui , He Xiao Yang , Gao Ying Ming , Zou Nian Yu
Published: May 2013

A series of Mg thin films with different thickness from 10 nm to 200 nm were prepared and hydrogenated. The transmission spectrum and sheet resistance before and after hydrogenation were measured. The transmission increased from nearly zero to 16 %, the maximal changes happened at 561 nm was 17.6% with 50 nm thickness of Mg thin film, and its sheet resistance increased from 2.3 to 75.2Ω/. The results show that the Mg thin films changed obviously from shiny, metallic films to transparent, insulating films. The attractive phenomenon might enlighten the investigation and be of particular interest for switchable mirrors.
Numerical Simulation of the Effect of Temperature on the Failure Strength of Rock
Authors: Bu Lin , Xu Tao , Zhang Yun Jie
Published: May 2013

The mechanical properties of granite experiencing high temperatures under uniaxial compression condition were simulated in this paper. Numerically simulated stress-strain curve, peak stress, peak strain and the tangent elastic modulus were compared with the corresponding physical tests. Simulated results agree well with physical tests results, it is shown that Abaqus is suitable for the analysis of the temperature effect on rock fracture.
Analysis on Creep Behaviors at High Temperature and Fracture Morphology of P92 Steels
Authors: Yuan Jun , Xu Hong , Wang Xiao , Yu Yang , Mao Xue Ping , Hu Su Yang
Published: May 2013

The high temperature creep test of P92 materials were carried out under different stresses at 600 °C and 650 °C, the microstructure of creep fracture appearance of samples was examined, the stress index n was fitted by Power Law Equation, and damage tolerance factor λ was calculated out. The results show that the ratio of creep fracture time vs. starting time of accelerating creep stage is range 1.4 to 1.8; the stress index n is 17 and 15, respectively; and damage tolerance factor λ is 3.1 and 3.26, respectively. According to stress index n and damage tolerance factor λ , the movement of dislocation leads to accelerating creep and final fracture. The results also show that P92 steel has good high temperature plasticity; micro fracture shows obvious dimple fracture characteristics and the second phase. Precipitation hardening effect from Laves-phase has the most influence on creep stability. At high temperature, dislocation density is decreased by rapid formation of Laves-phase, which lowers the fracture strengthening and accelerates creep fracture.
Modeling and Analysis of Underwater Wet Weld Process Based on Regression Method
Authors: Chen Bo , Feng Ji Cai
Published: May 2013

Underwater weld technology is urgently needed for the widely development of marine recourses, and weld automation technology is the inevitable choice because of the underwater environment. Because of the influence of the rigorous environment, the weld seam forming of underwater wet welding is very poor. To control the weld seam forming automatically, the model between the weld parameters and the weld seam shape must be built. This paper used arc sensor to monitor the electrical information of underwater wet welding process, and regression method was used to model the process, and the factors that influence the weld seam forming mostly were analyzed.
Computerized Numerical Control (CNC) Machining Engraving Processing of Surface Based on Master CAM
Authors: Huang Shi Wei
Published: May 2013

A FANCU computerized numerical control(CNC) machining carving method in the hemisphere surface parts by MasterCAM is recommended in the article, including CAD modeling of carving text & setting processing parameters according to the machining process , transmitting the G code of fool path to the FANUC , to realize the actual processing of the surface text carving . The method solves the problem of manual programming limitations, avoids the tedious calculation and program panel inputting, and improves the processing quality and efficiency of carving machining.
Mohr Strength Theory in Simulation Stress Analysis
Authors: Wang Qiang , Li Zhi Jun , Zhang Jian Xue , Xie Qi Feng , Tang Ping
Published: May 2013

This paper describes the new method of the finite element analysis based on the product cycle design. Based on the simulation software, combined with the Mohr strength theory, analyze the cabinet in several classic conditions of stress, then have the final test on the cabinet in the consolidated operating conditions.
Point-Based CAD/CAM Geometric Model Design
Authors: Wang Feng Jun
Published: May 2013

At present, CAD/CAM technology is applied in many areas, and machinery manufacturing was one of these areas in which CAD/CAM technology is the first and most widely used. With the development of CAD/CAM technology, CAD/CAM technology has become a key technology to improve the design and manufacturing standards, and enhance the competitiveness of the industry. In this paper, the concept of point-based geometric models used in CAD/CAM is proposed, the definition of the point-based geometric model and its CAD/CAM application process are suggested, and the geometric characteristics of the point-based geometric model and the CAD/CAM system development methodology are analysed.
Corrosion-Resistant Alloys for Tubings and Casings and Alloy Material Selection in Oil and Gas Wells
Authors: Li Ling Feng
Published: May 2013

This paper presents the technology background, the types and basic compositions of corrosion-resistant alloys for tubings and casings in oil and gas wells, modes of corrosion and influence factors for corrosion-resistant alloy, corrosion-resistant alloys material selection for tubings and casings in oil and gas wells. And the technology above has a good practicality for application .
Multi-Dimensional Analysis of NOx and Soot Formation in a Diesel-Fueled Hydraulic Free Piston Engine
Authors: Yu Ying Xiao , Yuan Zhao Cheng , Ma Jia Yi , Li Shi Yu
Published: May 2013

This paper is aimed at simulating and analyzing emission NOxand Soot formation in the hydraulic free piston engine (HFPE) designed and constructed by Jilin University. The combustion process of HFPE is simulated by using the commercial CFD software AVL FIRE, and the flow field and factors that influence NOxand Soot formation were analyzed. The simulated results indicate that NO is mainly distributed in the burned zone, whereas the distribution of Soot acts in accord with high unburnt equivalence ratio and high temperature burned zone. Injection timing increases, the amount of the formation of NO is reduced, whereas the mass fraction of Soot rises to a peak and descends. And small swirl ratio exerts a minor influence on emission mass fraction of HFPE.
Research and Application of the Structural Optimization Design Technique for the Large and Efficient Band Sawing Machine
Authors: Chen Guo Jin , Gong You Ping , Liu Tin Tin , Chen Hui Peng , Ni Jing
Published: May 2013

This paper takes the large band sawing machine GB42500H as the research object, and establishes the dynamics models of its various parts. Respectively, the relative research is done from the theoretical modal analysis and the dynamic performance testing. According to the analysis results, the structure or geometry improvement scheme of the parts is proposed. The paper also studies preliminarily the dynamic characteristics of the large band sawing machine GB42500H. During the analysis, the models of the parts and the whole are established using the finite element method to optimize the structures of the parts and the whole. That has undoubtedly a very important significance for improving the dynamic performance for the new machine tools structure, increasing the processing accuracy, and shortening the development cycle and costs.
Simulation on the Hydraulic System of a Constant Tension Waves Compensation Winch
Authors: Li Nan , Zhang Shi Yun , Ren Ai Di
Published: May 2013

In the process of that ocean-going ships were replenished on the sea, the control of constant tension for the overhead cable is very important. This paper redesign and simulation of the hydraulic control system of a foreign Highline constant tension winch, based on analysis of the control system of which. What will provide the experience of the design on the highline constant tension control hydraulic winch for replenishment on sea.
FEM Based Numerical Simulation of Delta Parallel Mechanism
Authors: Zhang Jian Zhong , Xie Xin Peng , Li Chuan Jin , Xin Ying Ying , He Zhao Ming
Published: May 2013

This paper describes a parallel three degrees of freedom delta mechanism used for pick-and-place. It has the advantages of simple integral structure, strong bearing capacityhigh precisionkinematics and dynamics performance. According to this mechanism wide development prospect, the company study on the inverse kinematics inverse dynamics analysis and the static analysis by using ANSYS finite element analysis Software of Delta. These analyses have laid a good theoretical foundation for future research. These researches provide possible for widely used in foodpackingautomated assembly line occasions of small and medium-sized enterprises.
Simulation Studies on the Influence of Impact Velocity on the PELE Penetrated and Broken Reinforced Concrete
Authors: Ye Xiao Jun , Du Zhong Hua , Hu Chuan Hui , Song Cheng Jun , Sheng Xiao
Published: May 2013

In order to study the effect of the impact velocity for the penetrator with enhanced lateral effect (PELE) penetrating reinforced concrete (RC) targets, penetration of PELE filled nylon against RC target using the different velocity is simulated by LS-DYNA finite element method software. Simulation shows that the impact velocity have definite effect on broken RC. On condition of PELE having penetrated target, with farther increase of impact velocity, the area of PELE broken RC on the direction of decrease firstly and augmentation thereafter, the residual velocity after penetrating target is less at the same time; Take into account validity of lateral effect and general launching condition, selecting the impact velocity at the range of 800 m/s-1300 m/s is suitable for PELE broken RC. The simulation results are in good agreement with those of the experiments.
Electrochemical Deburring of Miniature Holes
Authors: Zheng Xing Hua , Wei Ze Fei , Yu Zi Yuan
Published: May 2013

Electrochemical deburring (ECD) was used to remove burrs, which exist in the intersections of the miniature drilling holes and the inner wall of stainless steel pipe. Via experiments, the influences of the processing parameters on the deburring quality and the change law of the voltage between the electrode and workpiece were explored, such as process time, electrolytic composition, concentration. The ECD results showed that the burrs can be removed with good quality and efficiency in the condition of optimal selecting parameters.
Study on Film-Forming Technique of Aluminum Composite Membrane Prepared by Inorganic Precursor Sol-Gel Method
Authors: Guo Lin Lin , Wang Hong Min , Liu Wei , Xu Mei
Published: May 2013

Al2O3-SiO2-ZrO2composite sol was prepared with inorganic precursors by sol-gel method. Using Al2O3ceramic tubes as supporter, well-surfaced Al2O3-SiO2-ZrO2composite microfiltration membrane was achieved by the film-forming technique of pretreatment of the ceramic tube supporter, 3 times recycled dipping-drying-sintering, being dried at 50°C thermostatic water bath and sintered at 900°C.
Effects of Sodium Salt on Hot Mechanical Properties and Microstructure of MgO-Al-C Bricks
Authors: Wei Jun Cong , Ji Xiu Mei , Huang Jian Kun , Gao Chun Hui , Tu Jun Bo
Published: May 2013

The effects of addition of silicon powder (1 wt. %) and Na2CO3 (converting to additional 0.5%, 1% Na2O) on the hot modulus of rupture (HMOR) of MgO-Al-C bricks were investigated. MgO-Al-C refractories were prepared by using fused magnesia and graphite flake as main starting materials, and Si, Na2CO3 or both as additives. Its phase composition and microstructure were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), and EDS. The results showed that the HMOR of MgO-Al-C bricks increased slightly with addition of Si powder. However, the HMOR decreased when adding Na2CO3 and Si powder together. Moreover, the HMOR deduced with the increase of Na2CO3 content. The mechanism is that Al powder reacted to form fibrous Al4C3 and AlN, which could improve the HMOR. When silicon was added, β-SiC and M2S were formed, which could fill the passages and pores. So the densification and strength were improved. The addition of Na2CO3 could promote the oxidation of Al powder to form Al2O3, and inhibit the formation of Al4C3 and AlN. Hence the strength of MgO-Al-C deduced.
Studies on RC Beams Strength with Steel Wires Using Nolinear Finite Element Method
Authors: Song Cao , Zhou Jing Ya , Zhang Hong Mei
Published: May 2013

High strength stainless steel wire mesh-polymer mortar reinforcement method was a kind of advanced reinforcement technique.The present study attempted to do a model analysis on the test of the high strength steel wire mesh-polymer mortar reinforcement of less stress beams by using finite element software ANSYS. The study was conducted through the analysis of the three factors of the tested bending reinforcement beam’s deflection, deformation and stress and comparison of the changes of the beam’s ultimate load and failure mode before and after reinforcement.The results of ANSYS analysis and the test showed that the failure mode shifts from less reinforcement damaged into reinforcement destruction;the crack loading value of the reinforced beams increased indicating that the beam bottom reinforcement layer had a significant effect on the increase of the beam’s crack loading. Increased significantly compared to non-reinforced ultimate bearing capacity of reinforced beams. the ANSYS finite element simulation agrees well with the experimental value.
Study on Influencing Factors of CFST Arch Bridge Stability
Authors: Tao Hong Yu
Published: May 2013

In this paper, the finite element software Ansys is used to establish the model of Fenghua River super large bridge and to analyze its natural vibration characteristics. Without being considered the effect of pile-soil, the stiffness of different parts of the bridge structure is constantly changed to study the factors of influencing "Fly-bird-type" concrete filled steel tube arch bridge. The calculation results show that the arch rib stiffness, the wind bracing stiffness, the suspender stiffness and the main beam stiffness can improve the stability of the bridge structure, and also make the natural frequency increase.
Research of Underwater Oil Leak and Storage Detection Technique Based on Optical Fiber
Authors: Zhang Chun Tang , Zhang Wan Ying
Published: May 2013

As overland oil exploration develops into the intermediate and advanced stage, more and more offshore oilfields have been exploited. However, due to various kinds of unknown factors on the sea, related operations are faced with enormous challenges. In view of the specific operating conditions, an underwater oil storage system with a storage liner was designed. Meanwhile, the leakage of oil was detected through an oil spill transducer based on optical fiber technology with in-time alarm. Moreover, detection signal was denoised using a threshold method base on wavelet transform. The results showed that the denoising method is simple to use, convenient and can effectively remove the noise.