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期刊论文 13

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挣值管理 1

生物传感器 1

结直肠癌 1

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One DOF mechanism for the mechanical harvest of vines in an arbor structure and the validation of the acceleration of grape berry harvesting

Osvaldo PENISI,José BOCCA,Horacio AGUILAR,Pedro BOCCA

《机械工程前沿（英文）》 2015年 第10卷 第3期   页码 221-232 doi: 10.1007/s11465-015-0347-9

摘要：

In the mechanized harvest of vines, grape berries are detached through the vibration to the structure supporting the clusters. According to the kind of guide selected, the clusters require one or two vibration directions in the structure. For guiding in parral structures, vibration is necessary in two directions or planes: One perpendicular to the other. The guide branches producing the clusters develop in these planes, and the guiding is called H-guiding. Mechanism theory indicates that a mechanism has as many degrees of freedom as its actuators, and an actuator is needed to achieve a certain vibration. Having the smallest number of possible actuators is beneficial in reducing moving parts and achieving more compact and easily controllable mecha-nisms. In this case, a single degree-of-freedom mechanism is proposed. It is capable of generating vibrations on two planes: One perpendicular to the other. This mechanism is the sum of two link mechanisms on perpendicular planes with a common outlet located at the output rod of the mechanism where the actuator is found. As the distance between the soil and the elements containing the clusters is not constant, a system has been designed to measure the accelerations at the bars and the rocker to validate the acceleration values that detach the grape berries in a prototype in a lab experiment, to ensure that the acceleration needed for pulling the grape berries are produced at any contact point of the bar.

关键词： harvest     mechanisms     one DOF     vibration    

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Availability of wind energy resource potential for power generation at Jos, Nigeria

O. O. Ajayi, R. O. Fagbenle, J. Katende, J. O. Okeniyi

《能源前沿（英文）》 2011年 第5卷 第4期   页码 376-385 doi: 10.1007/s11708-011-0167-5

摘要： The objective of this study was to assess the potential viability of the wind resource potential in Jos, Plateau state, Nigeria for power generation. The monthly mean wind speeds that span from 1987 to 2007 were employed to statistically analyze the monthly, annual and seasonal potentials of the wind energy resources at the site. Besides, the results were employed together with two models of wind energy conversion system to simulate the likely average output power. The outcome showed that Jos was suitable as a site for wind farm projects of varying sizes and that MW·h to GW·h of electricity is likely to be produced per period of months, seasons and years. The average wind speed range at the site was also estimated to be between 6.7 and 11.8 m/s across the months, years and seasons.

关键词： green electricity     renewable resources     Weibull statistics     Jos     Nigeria    

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Synthesis of hydroxymethylfurfural and furfural from hardwood and softwood pulp using ferric sulphate as catalyst

Agneev Mukherjee, Guillermo Portillo-Perez, Marie-Josée Dumont

《化学科学与工程前沿（英文）》 2019年 第13卷 第3期   页码 531-542 doi: 10.1007/s11705-019-1814-3

摘要： Hydroxymethylfurfural (HMF) and furfural are promising chemicals for the creation of a bio-based economy. The development of an inexpensive catalytic system for converting cellulosic biomass into these chemicals is an important step in this regard. Ferric sulphate is a common, cheap and non-toxic Lewis acid that has been used to catalyse reactions such as wood depolymerisation. In this work, ferric sulphate was used to help the production of HMF and furfural from hardwood and softwood pulps. It was found that for hardwood pulp, the use of ferric sulphate alone gave a maximum HMF yield of 31.6 mol-%. The addition of the ionic liquid [BMIM]Cl or HCl as co-catalysts did not lead to an increase in the yields obtained. A prior decationisation step, however, resulted in HMF yields of 50.4 mol-%. Softwood pulp was harder to depolymerise than hardwood, with a yield of 28.7% obtained using ferric sulphate alone. The maximum HMF yield from softwood, 37.9 mol-%, was obtained using a combination of ferric sulphate and dilute HCl. It was thus concluded that ferric sulphate is a promising catalyst for HMF synthesis from cellulosic biomass.

关键词： 5-hydroxymethylfurfural     hardwood     softwood     ferric sulphate     biorefinery    

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Vacuum promotes metabolic shifts and increases biogenic hydrogen production in dark fermentation systems

DÍAZ,José L. SANZ

《环境科学与工程前沿（英文）》 2016年 第10卷 第3期   页码 513-521 doi: 10.1007/s11783-015-0777-y

摘要： The successful operation of any type of hydrogen-producing bioreactor depends on the performance of the microorganisms present in the system. Both substrate and partial gas pressures are crucial factors affecting dark fermentation metabolic pathways. The main objective of this study was to evaluate the impact of both factors on hydrogen production using anaerobic granular sludge as inoculum and, secondly, to study the metabolic shifts of an anaerobic community subjected to low partial gas pressures. With this goal in mind, seven different wastewater (four synthetic media, two industrial wastewater, and one domestic effluent) and the effect of applying vacuum on the systems were analyzed. The application of vacuum promoted an increase in the diversity of hydrogen-producing bacteria, such as , and promoted the dominance of acetoclastic- over hydrogenotrophic methanogens. The application of different media promoted a wide variety of metabolic pathways. Nevertheless, reduction of the hydrogen partial pressure by application of vacuum lead to further oxidation of reaction intermediates irrespective of the medium used, which resulted in higher hydrogen and methane production, and improved the COD removal. Interestingly, vacuum greatly promoted biogenic hydrogen production from a real wastewater, which opens possibilities for future application of dark fermentation systems to enhance biohydrogen yields.

关键词： dark fermentation     biohydrogen     wastewaters     vacuum    

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Analysis of foundation sliding of an arch dam considering the hydromechanical behavior

Maria Luísa Braga FARINHA, José Vieira de LEMOS, Emanuel MARANHA DAS NEVES

《结构与土木工程前沿（英文）》 2012年 第6卷 第1期   页码 35-43 doi: 10.1007/s11709-012-0142-1

摘要： This paper presents the application of a methodology which can be used to assess arch dam foundation stability, using the discrete element method (DEM) and the code 3DEC. A global three-dimensional model of a dam foundation was developed, in which some discontinuities were simulated and both the grout and drainage curtains were represented. The model, calibrated taking into account recorded data, was used to carry out nonlinear mechanical analysis. The same model was employed to perform a hydraulic analysis, based on equivalent continuum concepts, which allowed the water pressure pattern within the foundation to be obtained. These water pressures were applied on discontinuities involved in the possible sliding mechanism along the dam/foundation interface, and the safety of the dam/foundation system was evaluated using a process of reduction of strength characteristics, with the aim of calculating the minimum safety factors that ensure stability. Results were compared with those obtained with the usual bi-linear uplift pressure distribution at the base of the dam, commonly used in concrete dam design. The relevance of carrying out hydraulic analysis in arch dam foundation failure studies is highlighted.

关键词： concrete dams     rock foundations     hydromechanical behavior     failure analysis    

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项目进度管理中基于挣值的随机工期分析 Review

Fernando Acebes, David Poza, José Manuel González-Varona, Adolfo López-Paredes

《工程（英文）》 2022年 第9卷 第2期   页码 148-162 doi: 10.1016/j.eng.2021.07.019

摘要：

挣值工期管理（EDM）是一种用于项目进度管理（PSM）的研究方法，当无法使用挣值管理（EVM）时，可以考虑这种方法。挣值工期管理用于估算进度偏差和最终项目工期。挣值工期管理和挣值管理的关键区别在于：在挣值工期管理中，用工作周期表示活动的值；而在挣值管理中，用成本表示活动的值。本文将展示如何使用挣值工期管理监控随机项目。为便于解释该方法，本文通过实例分析对呈现出高度不确定性的项目开展研究，项目中的各项活动采用随机工期。根据这些活动的网络拓扑分析该方法的可用性，并比较了挣值管理和挣值进度分析法（ESM）对项目进度管理的作用。

关键词： 挣值工期管理     挣值管理     随机项目控制     工期预测     不确定性    

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Optimization of pretreatment of Jatropha oil with high free fatty acids for biodiesel production

Supriyono SUWITO, Giuliano DRAGONE, Hary SULISTYO, Bardi MURACHMAN, Suryo PURWONO, José TEIXEIRA

《化学科学与工程前沿（英文）》 2012年 第6卷 第2期   页码 210-215 doi: 10.1007/s11705-012-1282-5

摘要： A central composite rotatable design and response surface methodology were used in order to investigate the individual and combined effects of the ethanol-to-oil ratio, H SO concentration, temperature and time of reaction on the reduction of free fatty acid (FFA) in jatropha oil. A quadratic polynomial model relating the reaction variables with FFA reduction was developed, presenting a good coefficient of determination ( = 0.893). For reducing FFA to less than 1%, the optimal combination was found to be 0.62 v·v ethanol-to-oil ratio (14.9 v·v ethanol-to-FFA ratio), 1.7% v·v H SO concentration, and 79 min reaction time at a reaction temperature of 54°C. These results are of great relevance to maximize methyl esters formation by transesterification using an alkaline catalyst.

关键词： biodiesel     biofuel     esterification     free fatty acids     jatropha curcas oil    

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Modelling and diagnostics of multiple cathodes plasma torch system for plasma spraying

Nazlim BAGCIVAN, Lidong ZHAO, Ivica PETKOVIC, Jochen SCHEIN, Karsten HARTZ-BEHREND, Stefan KIRNER, José-Luis

《机械工程前沿（英文）》 2011年 第6卷 第3期   页码 324-331 doi: 10.1007/s11465-011-0125-2

摘要：

Usage of a multiple-arcs system has significantly improved process stability and coating properties in air plasma spraying. However, there are still demands on understanding and controlling the physical process to determine process conditions for reproducible coating quality and homogeneity of coating microstructure. The main goal of this work is the application of numerical simulation for the prediction of the temperature profiles at the torch outlet for real process conditions. Behaviour of the gas flow and electric arcs were described in a three-dimensional numerical model. The calculated results showed the characteristic triangular temperature distribution at the torch nozzle outlet caused by three electric arcs. These results were compared with experimentally determined temperature distributions, which were obtained with specially developed computed tomography equipment for reconstructing the emissivity and temperature distribution of the plasma jet close to the torch exit. The calculated results related to temperature values and contours were verified for the most process parameters with experimental ones.

关键词： plasma spraying     electric arc     three-cathode plasma torch     numerical simulation     computed tomography    

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A multi-integrated approach on toxicity effects of engineered TiO

DINIZ,Joana LOURENÇO,Isabel PERES,Luisa CASTRO,José Brito CORREIA,Joana PEREIRA,Isabel FERREIRA,António

《环境科学与工程前沿（英文）》 2015年 第9卷 第5期   页码 793-803 doi: 10.1007/s11783-015-0775-0

摘要： The new properties of engineered nanoparticles drive the need for new knowledge on the safety, fate, behavior and biologic effects of these particles on organisms and ecosystems. Titanium dioxide nanoparticles have been used extensively for a wide range of applications, e.g, self-cleaning surface coatings, solar cells, water treatment agents, topical sunscreens. Within this scenario increased environmental exposure can be expected but data on the ecotoxicological evaluation of nanoparticles are still scarce. The main purpose of this work was the evaluation of effects of TiO nanoparticles in several organisms, covering different trophic levels, using a battery of aquatic assays. Using fish as a vertebrate model organism tissue histological and ultrastructural observations and the stress enzyme activity were also studied. TiO nanoparticles (Aeroxide® P25), two phase composition of anatase (65%) and rutile (35%) with an average particle size value of 27.6±11 nm were used. Results on the EC for the tested aquatic organisms showed toxicity for the bacteria, the algae and the crustacean, being the algae the most sensitive tested organism. The aquatic plant showed no effect on growth. The fish showed no effect on a 21 day survival test, though at a biochemical level the cytosolic Glutathione-S-Transferase total activity, in intestines, showed a general significant decrease ( <0.05) after 14 days of exposure for all tested concentrations. The presence of TiO nanoparticles aggregates were observed in the intestine lumen but their internalization by intestine cells could not be confirmed.

关键词： ecotoxicity     enzymatic analysis     histology     transmission electron microscopy (TEM)     TiO2-nanoparticles    

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Non-thermal plasma for exhaust gases treatment

,José HUERTAS C.,Hilda FRÍAS P.

《机械工程前沿（英文）》 2015年 第10卷 第3期   页码 301-305 doi: 10.1007/s11465-015-0344-z

摘要：

This article describes a study on a non-thermal plasma device to treat exhaust gases in an internal combustion engine. Several tests using a plasma device to treat exhaust gases are conducted on a Honda GX200-196 cm3 engine at different rotational speeds. A plasma reactor could be efficient in degrading nitrogen oxides and particulate matter. Monoxide and carbon dioxide treatment is minimal. However, achieving 1%–3% degradation may be interesting to reduce the emission of greenhouse gases.

关键词： plasma treatment     NOx     CO     CO2     particulate matter     vehicle    

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LAND-USE INTENSIFICATION TRENDS IN THE RIO DE LA PLATA REGION OF SOUTH AMERICA: TOWARD SPECIALIZATION OR RECOUPLING CROP AND LIVESTOCK PRODUCTION

Paulo César DE FACCIO CARVALHO, Jean Víctor SAVIAN, Tomas DELLA CHIESA, William DE SOUZA FILHO, José

《农业科学与工程前沿（英文）》 2021年 第8卷 第1期   页码 97-110 doi: 10.15302/J-FASE-2020380

摘要： The Rio de la Plata region comprises central Argentina, Uruguay, and southern Brazil. Modern agriculture developed around 1900 with recent decades being characterized by the advance of cropping areas over native grasslands. Highly specialized agriculture has decoupled crop and livestock production but has succeeded in intensifying yields. However, significant losses of ecosystem services have been reported. Thus, questions have been raised on the sustainability of this pathway. A glance at world regions that have experienced similar trends suggests that an urgent course correction is needed. A major concern has been the lack of diversity in regions with highly specialized agriculture, promoting renewed interest in integrated crop-livestock systems (ICLS), not only because ICLS are more diverse than specialized systems, but also because they are rare examples of reconciliation between agroecosystem intensification and environmental quality. Consequently, this paper discusses alternatives to redesign multifunctional landscapes based on ICLS. Recent data provide evidence that recoupling crop and animal production increases the resilience of nutrient cycling functions and economic indicators to external stressors, enabling these systems to face climate-market uncertainty and reconcile food production with the provision of diverse ecosystem services. Finally, these concepts are exemplified in case studies where this perspective has been successfully applied.

关键词： grazing     integrated crop-livestock systems     mixed crops-livestock     Pampa    

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Multi-camera systems for rehabilitation therapies: a study of the precision of MicrosoftKinect sensors Project partially supported by Spanish Ministerio de Economíay Competitividad/FEDER (Nos. TIN2012-34003 and TIN2013-47074-C2-1-R) and FPU Scholarship (FPU13/03141) from the Spanish Government A preliminary version was presented at the 13th International Conference on Practical Applications of Agents and Multi-Agent Systems, June 3–4, 2015, Spain

Miguel OLIVER,Francisco MONTERO,José Pascual MOLINA,Pascual GONZÁLEZ,Antonio FERNÁNDEZ-CABALLERO

《信息与电子工程前沿（英文）》 2016年 第17卷 第4期   页码 348-364 doi: 10.1631/FITEE.1500347

摘要： This paper seeks to determine how the overlap of several infrared beams affects the tracked position of the user, depending on the angle of incidence of light, distance to the target, distance between sensors, and the number of capture devices used. We also try to show that under ideal conditions using several Kinect sensors increases the precision of the data collected. The results obtained can be used in the design of telerehabilitation environments in which several RGB-D cameras are needed to improve precision or increase the tracking range. A numerical analysis of the results is included and comparisons are made with the results of other studies. Finally, we describe a system that implements intelligent methods for the rehabilitation of patients based on the results of the tests carried out.

关键词： Kinect sensor     Rehabilitation system     Capture precision     Multi-camera system    

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从结直肠癌细胞和组织样本释放的外泌体中检测肿瘤相关抗原自身抗体的多路生物传感诊断平台展示了对结直肠癌的高诊断能力 Article

Ignacio Casal, Gemma Domínguez, Ana Guzman-Aranguez, Alberto Peláez-García, José Manuel Pingarrón, Susana

《工程（英文）》 2021年 第7卷 第10期   页码 1393-1412 doi: 10.1016/j.eng.2021.04.026

摘要：

结直肠癌（CRC）是全球导致癌症相关死亡的第二大原因。CRC患者的5年生存率与诊断分期息息相关。CRC早期诊断患者的5年生存率高于80%，CRC晚期诊断患者的5年生存率低于10%。大量研究表明，患者血清中特定CRC自身抗原[肿瘤相关抗原（TAA）]对应的自身抗体有助于早期诊断。因此，本文旨在识别CRC特异性自身抗体的自身抗原靶点，借助液体活检技术有效筛查CRC患者和健康个体。为此，我们从CRC患者体内提取5个CRC细胞系和组织样本，通过免疫沉淀-质谱分析法测量其分泌的外泌体的蛋白质含量，共鉴定出103种蛋白质为潜在的CRC特异性自身抗原。采用生物信息学技术和荟萃分析，我们选定了15种与实际CRC自身抗原类似度更高的蛋白质，以便后续借助蛋白质印迹法（WB）和免疫组织化学技术（IHC）评估它们在CRC预后中的作用。结果发现，在患者的组织和血浆外泌体样本中，有11种蛋白质发生蛋白质水平失调，有9种蛋白质与CRC预后有关。经验证发现，除一例外，所有研究均显示出具有统计学意义的高诊断能力，采用荧光Halotag磁珠，或者借助多路生物传感平台（磁性微载体为固相载体，由用于CRC细胞检测的共价固定Halotag融合蛋白修饰），能够有效筛查区分CRC患者、癌前病变个体与健康个体。综上所述，本文的研究结果突出了此研究方法在识别慢性疾病特征TAA时的有效性；此外，本文采用的测量血浆中TAA对应的自身抗体水平的方法可以应用到具有高诊断能力的CRC检测即时医疗（POC）设备中。

关键词： 自身抗体     诊断     结直肠癌     外泌体     肿瘤微环境     体液免疫应答     即时医疗     生物传感器    

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标题 作者 时间 类型 操作

One DOF mechanism for the mechanical harvest of vines in an arbor structure and the validation of the acceleration of grape berry harvesting

Osvaldo PENISI,José BOCCA,Horacio AGUILAR,Pedro BOCCA

期刊论文

Availability of wind energy resource potential for power generation at Jos, Nigeria

O. O. Ajayi, R. O. Fagbenle, J. Katende, J. O. Okeniyi

期刊论文

Synthesis of hydroxymethylfurfural and furfural from hardwood and softwood pulp using ferric sulphate as catalyst

Agneev Mukherjee, Guillermo Portillo-Perez, Marie-Josée Dumont

期刊论文

Vacuum promotes metabolic shifts and increases biogenic hydrogen production in dark fermentation systems

DÍAZ,José L. SANZ

期刊论文

Analysis of foundation sliding of an arch dam considering the hydromechanical behavior

Maria Luísa Braga FARINHA, José Vieira de LEMOS, Emanuel MARANHA DAS NEVES

期刊论文

项目进度管理中基于挣值的随机工期分析

Fernando Acebes, David Poza, José Manuel González-Varona, Adolfo López-Paredes

期刊论文

Optimization of pretreatment of Jatropha oil with high free fatty acids for biodiesel production

Supriyono SUWITO, Giuliano DRAGONE, Hary SULISTYO, Bardi MURACHMAN, Suryo PURWONO, José TEIXEIRA

期刊论文

Modelling and diagnostics of multiple cathodes plasma torch system for plasma spraying

Nazlim BAGCIVAN, Lidong ZHAO, Ivica PETKOVIC, Jochen SCHEIN, Karsten HARTZ-BEHREND, Stefan KIRNER, José-Luis

期刊论文

A multi-integrated approach on toxicity effects of engineered TiO

DINIZ,Joana LOURENÇO,Isabel PERES,Luisa CASTRO,José Brito CORREIA,Joana PEREIRA,Isabel FERREIRA,António

期刊论文

Non-thermal plasma for exhaust gases treatment

,José HUERTAS C.,Hilda FRÍAS P.

期刊论文

LAND-USE INTENSIFICATION TRENDS IN THE RIO DE LA PLATA REGION OF SOUTH AMERICA: TOWARD SPECIALIZATION OR RECOUPLING CROP AND LIVESTOCK PRODUCTION

Paulo César DE FACCIO CARVALHO, Jean Víctor SAVIAN, Tomas DELLA CHIESA, William DE SOUZA FILHO, José

期刊论文

Multi-camera systems for rehabilitation therapies: a study of the precision of MicrosoftKinect sensors Project partially supported by Spanish Ministerio de Economíay Competitividad/FEDER (Nos. TIN2012-34003 and TIN2013-47074-C2-1-R) and FPU Scholarship (FPU13/03141) from the Spanish Government A preliminary version was presented at the 13th International Conference on Practical Applications of Agents and Multi-Agent Systems, June 3–4, 2015, Spain

Miguel OLIVER,Francisco MONTERO,José Pascual MOLINA,Pascual GONZÁLEZ,Antonio FERNÁNDEZ-CABALLERO

期刊论文

从结直肠癌细胞和组织样本释放的外泌体中检测肿瘤相关抗原自身抗体的多路生物传感诊断平台展示了对结直肠癌的高诊断能力

Ignacio Casal, Gemma Domínguez, Ana Guzman-Aranguez, Alberto Peláez-García, José Manuel Pingarrón, Susana

期刊论文