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基于Vulcan-11的Choco-10露天金矿三维建模及智能钻爆优化研究

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基于Vulcan-11的Choco-10露天金矿三维建模及智能钻爆优化研究

作者： JAVIER ALEJANdRO marin.MEdINA（马瑞）中国矿业大学

学位级别：硕士

露天矿爆破环节在露天矿工程设计和生产管理中起着重要的作用,而矿山三维地质建模及爆破智能设计对爆破效果起着关键作用。CHOCO-10金矿是委内瑞拉的一个重要的金矿资源,也是未来重点发展、应用先进开采技术的露天矿。当前,该矿的爆破... 详细信息

露天矿爆破环节在露天矿工程设计和生产管理中起着重要的作用,而矿山三维地质建模及爆破智能设计对爆破效果起着关键作用。CHOCO-10金矿是委内瑞拉的一个重要的金矿资源,也是未来重点发展、应用先进开采技术的露天矿。当前,该矿的爆破工艺与技术相对落后,仍然没有实现爆破计算机辅助设计,造成了爆破施工成本高、效率低、效果差、震动大、粉尘污染重等问题。本文以委内瑞拉CHOCO-10金矿台阶爆破为研究对象,详细分析了矿山爆破作业存在问题。以经典爆破理论为基础,研究CHOCO-10金矿爆破工艺参数的合理性及深度优化方案。选择Maptek公司的Vulcan-11三维矿山设计软件对CHOCO-10金矿进行地质建模与爆破优化设计。基于卫星图像的基础数据,构建了三位矿山地质模型;基于露天矿爆破理论,运用Vulcan-11软件模拟了爆破参数、岩石移动方向、毫秒同时起爆量等爆破动态过程与最终效果。最后采用技术经济学原理,详细分析了CHOCO-10金矿爆破智能化设计相比于传统手工设计方式在技术、效率与成本控制等方面的优越性。通过对CHOCO-10金矿的爆破优化设计与智能化应用,提高了矿山的爆破工艺水平与生产效率,优化了爆破质量,降低了爆破危害,保护了矿区周边环境,有助于提高委内瑞纳采矿工艺现代化与智能化水平。图47张,表7个,参考文献80条

关键词：露天采矿爆破优化设计矿山地质建模 Vulcan-11 爆破模拟

Urotensin II levels in patients with inflammatory bowel disease

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World Journal of Gastroenterology 2021年第36期27卷 6142-6153页

作者： damir Alicic dinko Martinovic doris Rusic Piero marin.Zivkovic Ivana Tadin Hadjina marin. Vilovic Marko Kumric daria Tokic daniela Supe-domic Slaven Lupi-Ferandin Josko Bozic department of Gastroenterology University Hospital of SplitSplit 21000Croatia department of Pathophysiology University of Split School of MedicineSplit 21000Croatia department of Pharmacy University of Split School of MedicineSplit 21000Croatia department of Anesthesiology and Intensive care University Hospital of SplitSplit 21000Croatia department of Health Studies University of SplitSplit 21000Croatia department of Maxillofacial Surgery University Hospital of SplitSplit 21000Croatia

BACKGROUNd Patients with inflammatory bowel disease(IBd)are associated with increased cardiovascular risk and have increased overall cardiovascular *** the other hand,urotensin II(UII)is one of the most potent vascular constrictors with immunomodulatory effect that is connected with a number of different cardiometabolic disorders as ***,patients with ulcerative colitis have shown increased expression of urotensin II receptor in comparison to healthy *** the features of IBd includes chronic inflammation and endothelial dysfunction as well,it is plausible to assume that there is connection between increased cardiac risk in IBd and *** To determine serum UII levels in patients with IBd and to compare them to control subjects,as well as investigate possible associations with relevant clinical and biochemical *** This cross sectional study consecutively enrolled 50 adult IBd patients(26 with Crohn’s disease and 24 with ulcerative colitis)and 50 age and gender matched *** assessment was performed by the same experienced gastroenterologist according to the latest *** Colitis Endoscopic Index of Severity and Simple Endoscopic Score for Crohn’s disease were used for endoscopic *** levels of UII were determined using the enzyme immunoassay kit for human UII,according to the manufacturer’s *** IBd patients have significantly higher concentrations of UII when compared to control subjects(7.57±1.41 vs 1.98±0.69 ng/mL,Pdifferences between Crohn’s disease and ulcerative colitis patients(7.49±1.42 vs 7.65±1.41 ng/mL,P=0.689).There was a significant positive correlation between serum UII levels and high sensitivity C reactive peptide levels(r=0.491,Pd a significant negative correlation between serum UII levels and total proteins(r=-0.306,P=0.032).Additionally,there was a significant positive correlation between serum UII leve

关键词： Inflammatory bowel disease Crohn’s disease Ulcerative colitis Urotensin II Cardiovascular risk Endoscopic activity

Engineering of Fuel Plates on Uranium-Molybdenum Monolithic: Critical Issues

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World Journal of Nuclear Science and Technology 2015年第4期5卷 274-286页

作者： Jaime Lisboa Jorge marin.Mario Barrera Héctor Pesenti departamento de Materiales Nucleares Comisión Chilena de Energía Nuclear CCHEN Santiago Chile Instituto de Materiales Facultad de Ingeniería Universidad Austral de Chile Valdivia Chile

Engineering of nuclear fuels using monolithic plates of uranium-molybdenum and Al-6061 cladding is the current challenge for research and test reactors. The main drawback of the manufacture of monolithic nuclear fuel was analyzed using two surface coating methods: aluminum sputtering and transient liquid phase bonding (TLPB). Coating was done with a commercial alloy of Al-Si (R-4047). These techniques were used to improve the metallurgical bonding between the UMo and the cladding by rolling. Finally, design parameters and manufacture of UMo plate fuels were established. Mechanical tests were used to characterize the plates, resulting in UTS values of about 700 and 1000 MPa for the UMo alloys. These results are complemented with metrological analyses, X-Ray diffraction (XRd), thermal analyses, and metallography. X-rays and ultrasound scanners were used to monitor bonding and the co-rolling effects. These initial results show the main obstacles to the engineering development of UMo monolithic plate fuels with Al-6061 cladding, and these are discussed herein.

关键词： Metallurgic Bonding Co-Rolling Monolithic UMo Aluminum Alloy Nuclear Fuel

Triple Arthrodesis with Internal and External Fixation: Technique Paper

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Surgical Science 2014年第4期5卷 183-192页

作者： Luis E. marin.Randy Semma Nisha Bala Krishnan marin.Foot and Ankle Center Hialeah USA

Background: The triple arthrodesis was described early by Myerson in 1923 and has been the gold standard surgical procedure for various conditions with the goal to reduce pain, improve deformity and facilitate function. Methods: The procedure consists of fusion of the subtalar joint, talonavicular joint and calcaneocuboid joint [1]. The procedure is traditionally done with internal fixation, however, marin.t al. has shown it to be performed with external fixation [2]. dr. marin.and the associates have developed an alternative technique to perform a triple arthrodesis using internal and external fixation. This paper describes a step-by-step technique to perform a triple arthrodesis with both internal and external fixation. It will demonstrate the use of the prefabricated arches on the footplate for more precise and accurate placement of transosseous wires using arch-wire technique [3]. Results/Conclusion: We believe this technique will not only help increase the ability to achieve fusion with a less chance of non-union, but may also decrease healing time, which may allow patients to be mobile from the first week post-operatively and may diminish the risks associated with being non-weightbearing.

关键词： Triple Arthrodesis Podiatric Medicine Surgery External Fixation Internal Fixation Walking Technique Podiatry

Atomization of UMo Particles under Nitrogen Atmosphere

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World Journal of Nuclear Science and Technology 2016年第1期6卷 43-52页

作者： Luis Olivares Jaime Lisboa Jorge marin.Mario Barrera Alberto Navarrete Nuclear Materials department Chilean Commission for Nuclear Energy (CCHEN) Santiago Chile Physic department Universidad de Santiago de Chile (USACH) Santiago Chile

Generally, the atomization of UMo particles is done under vacuum or argon atmosphere, and the surface modification of these UMo particles is, usually, carried on through a further process. The techniques for surface modification of atomized UMo particles, aimed to control the Fuel/Matrix interaction, involve, in some cases, complex methodologies and often with minor effect due to the limited solubility of third elements in solid UMo alloy. The atomization and surface conditioning, applied in separate stages, may affect the efficiency of powder production process. Then, the main goal of this study is to explore the surface modification of UMo particles in liquid state or during the solidification that follows the centrifugal atomization process. Through the change of atomization atmosphere, could be possible to promote liquid/gas reactions, with a higher solubility of the modifier element in micro drops of UMo alloy, before they become solid particles. This paper presents comparative results of centrifugal atomization of UMo particles, carried out under inert argon and reactive nitrogen atmospheres. dissolved nitrogen contents, measured by SEM-EdS analyses, reached up to 7.57 wt% at the center of under nitrogen atomized particles, very higher than 0.84 wt% of nitrogen measured at the center of UMo particle atomized under argon. The presence of uranium nitride was partially verified by conventional XRd analysis. Nevertheless, Out-of-Pile interaction test result, reveals decreasing of aluminium contents into UMo particles atomized under nitrogen atmosphere;Just 3.77 wt% of Al was the maximum content detected in the center of these particles, very lower than 29.11 wt% of Al measured inside UMo particles atomized under argon. Finally, it is possible to conclude that the atomization under reactive atmosphere may modify the surface composition and the behavior of UMo fuel particles dispersed in aluminium, for dispersion type nuclear fuel application.

关键词： Atomization UMo Particles dispersion Nuclear Fuel

Williams-Beuren syndrome: Usual face, unusual heart

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Open Journal of Genetics 2013年第1期3卷 79-81页

作者： Natalia marin.Huarte Luis García-Guereta Pablo Lapunzina Genetics department Universitary Hospital La Paz Madrid Spain Neonatology department Universitary Hospital La Paz Madrid Spain Pediatric Cardiology department Universitary Hospital La Paz Madrid Spain

Williams-Beuren Syndrome (WB-S) occurs in approximately 1/7500 live births. It is characterized by typical facial features, congenital heart defects and mild mental retardation. Around 75% - 80% of all patients have some kind of cardiovascular disorder being supravalvular aortic stenosis and pulmonary artery stenosis the most frequent. This syndrome is due to a contiguous gene deletion (1- to 2-megabase deletion on the long arm of chromosome 7), including the entire elastin gene and 20 additional genes. We present a case of a two year old boy with WB-S and Tetralogy of Fallot, a very infrequent association. diagnosis of WB-S could be made because of typical facial features. Characteristic WB-S deletion was present. Genetic study to rule out 22q11 deletion was also performed.

关键词： Williams-Beuren Syndrome Tetralogy of Fallot Genetic diagnosis

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中国海水养殖的资源消耗 ——以宁德市为例

中国海水养殖的资源消耗 ——以宁德市为例

作者： Tomás marin.del Valle 浙江大学

学位级别：硕士

China is the biggest producer of aquaculture products,accounting for 62%and 48%of the total production of aquatic animals and plants,*** rapid growth of the industry has generated concerns about its negative effects on sustainable *** environmental impacts of aquaculture expansion include changes in land and sea use,the release of waste and effluents to local ecosystems,and the overexploitation of natural resources,and they will ultimately affect the provision of ecosystem services that constitute the livelihood of many communities *** studies published to date have focused in the impacts of freshwater and brackish water systems,and have assessed the environmental burden of the production of a few relevant ***,the impacts of mariculture systems have received comparatively less attention,despite the broad impacts of these systems over coastal ecosystems and local *** China,the mariculture sector is expanding at a fast rate and its environmental and socioeconomic impacts are intensifying,but very few studies related to these issues have been *** life cycle assessment(LCA)has become the main tool used to assess the performance of aquaculture *** research field has evolved considerably,from small case studies conducted on single species to publications that conduct regional assessments and propose methodological *** main results of the assessments reported to date are the high environmental cost of feed,the release of nitrogen and phosphorus effluents to water bodies,and the differences in impacts between various production ***,the variety of choices and approaches taken by researchers when conducting these analyses is considerable and many issues still remain unresolved,including optimal allocation procedures and uncertainty *** study quantifies the resource use in the production of six of the main mariculture products farmed in China:Large yellow

关键词： Aquaculture coastal ecosystem management exergy life cycle assessment marin. eco-civilization spillover effect

Noisy environments:untangling the role of anthropogenic noise on bird species richness in a Neotropical city

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Avian Research 2020年第3期11卷 258-264页

作者： Cecilia Odette Carral-Murrieta Michelle Garcia-Arroyo Oscar H.marin.Gomez J.Roberto Sosa-Lopez Ian MacGregor-Fors Red de Ambiente y Sustentabilidad Instituto de EcologíaA.C.(INECOL)Carretera antigua a Coatepec 351El Haya91070 XalapaVeracruzMexico Centro Interdisciplinario de Investigación para el desarrollo Integral Regional Unidad Oaxaca(CIIdIR) Instituto Politécnico NacionalOaxacaMexico dirección de Cátedras Consejo Nacional de Ciencia y Tecnología(CONACYT)Mexico CityMexico

Background:Among urban stimuli,anthropogenic noise has been identified to be one of the behavioral drivers of species that rely on acoustic signals for *** have shown both species‑specific and assemblage responses to urban noise,ranging from the modulation of their acoustic frequencies and spatiotemporal adjustments to declines in species *** this study,we assessed the citywide relationship between two anthropogenic noise variables(noise levels recorded during bird surveys and daily average noise levels)and vegetation cover with bird species ***:This study was conducted in the city of Xalapa(Mexico)through a 114 citywide point‑count *** recorded bird communities at each sampling *** measured noise levels using a sound level meter while performing point‑***,we generated a map of average daily noise of the city using an array of 61 autonomous recording units distributed across the city of Xalapa and calculated daily noise levels for the 114 *** ran a linear model(LM)to assess potential relationships between both point‑count and daily(24 h)noise values and vegetation cover with bird ***:Results from the LM show:(1)a negative relationship between maximum point‑count noise and avian species richness,(2)no relationship between 24 h noise and bird species richness,and(3)a positive relationship between vegetation cover and bird species ***:Results provide evidence that decreases in urban bird species richness do not necessarily imply the permanent absence of species,suggesting that birds can temporarily fly away from or avoid sites when noisy,become cryptic while noisy events are occurring,or be undetected due to our inability to record them in the field during noisy events.

关键词： Avian ecology Bird communication Noise pollution Species richness Urban ecology