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高硅锌精矿焙烧过程中硅的控制及热平衡计算

有色金属工程 2024年第1期14卷 61-66页

作者：张恒星陈杭陈芬陈期生应宗波吴星琳王俊娥福建紫金贵金属材料有限公司福建上杭364200 紫金铜业有限公司福建上杭364200 厦门紫金矿冶技术有限公司福建厦门361115

针对高硅锌精矿焙烧过程中焙砂可溶硅高、沸腾炉易结块、浸出固液分离困难等问题,以现场生产焙烧工艺参数为基础,研究了低温和高温焙烧对焙砂中可溶硅含量的影响,并基于MatCal软件对沸腾炉焙烧工艺进行热平衡计算。结果表明:在焙烧条件... 详细信息

针对高硅锌精矿焙烧过程中焙砂可溶硅高、沸腾炉易结块、浸出固液分离困难等问题,以现场生产焙烧工艺参数为基础,研究了低温和高温焙烧对焙砂中可溶硅含量的影响,并基于MatCal软件对沸腾炉焙烧工艺进行热平衡计算。结果表明:在焙烧条件基本相同的情况下,随着硫化锌精矿焙烧温度的增加,焙砂中的可溶硅也增加。当焙砂中可溶硅高于3.18%会出现浓密机上清液跑混、低浸浓密底流矿浆过滤困难、净液中除杂钴偏高等问题。经MatCal模拟计算后,理论消耗空气50361.328 m 3/h,低温焙烧的平均风量47102.8 m 3/h,高温焙烧平均风量48005.7 m 3/h,实际的焙烧中平均风量偏低,需要增加沸腾炉的风料比。

关键词：硫化锌精矿沸腾炉焙烧热平衡

Reconciling Local and Global Agendas in Sustainable Development: Participatory Research with Indigenous Andean Communities

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Journal of Mountain Science 2006年第4期3卷 334-346页

作者： Robert e. Rhoades Virginia Nazarea University of Georgia USA Professor of Anthropology University of Georgia USA

This paper discusses participatory research in the Andes and presents a case study in Cotacachi, ecuador, where sustainability scientists and indigenous people seek common ground in their respective but drastically different research and social agendas. Participatory research based on Andean experiences pre-dated and inspired much of the later international movement in agriculture, health, and conservation. Andean communities have a long history in demanding that outsiders address the needs of the community as a condition for carrying out scientific or applied activities. What an Andean community, however, sees as relevant may or may not be within the rubric of ‘participatory research’ as it is practiced throughout much of the world. In fact, overzealous participatory researchers are just as bothersome as their predecessors bearing long questionnaires. More important to Andean people is an equitable relationship with researchers and developers in which exchanges of value are made. A distinction between ‘enriching’ and ‘extractive’ research is drawn. In the case of the SANReM project in Cotacachi, ecuador, scientists carried out enriching research activities of interest to local people as a wayto generate social capital for conducting basic research which does not have an obvious, immediate local benefit. The requested research did not have a conventional participatory methodology but provided valuable products (educational opportunity, germplasm, community visualization tools, and information) to the indigenous community in exchange for time and resources to conduct research on more basic natural resource questions. We argue that in the Andean context the key to reconciling the needs of scientists and of local needs is seeking new forms of equitable collaboration which reach beyond the present and now somewhat tired discourse of ‘participation’.

关键词： Andes indigenous peoples participatory research sustainability

Comparing the impacts of mature spruce forests and grasslands on snow melt,water resource recharge,and run-off in the northern boreal environment

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International Soil and Water Conservation Research 2015年第1期3卷 50-56页

作者： JiříKremsa Josef Křeček eero Kubin Watershed Authority of the elbe River Víta Nejedlého 951/8CZ-50003 Hradec KrálovéCzech Republic Department of Hydrology Czech Technical University in PragueThákurova 7CZ-16629 Prague 6Czech Republic Natural Resources Institute Finland Natural Resources and BioproductionPO Box 413FI-90014 University of OuluFinland

Snow-melt runoff is an important factor in control of flooding and soil erosion in higher and cold regions of the *** 1992-2008-2008,processes of snow accumulation and melting were monitored at two adjacent sites of the Paljakka environmental research centre(Finland).The forest stand of mature spruce(Picea abies)has been compared with adjacent,local,and open *** the forest,snowpack duration fluctuated for 180-245 days,with a maximum depth of 78-152 cm and snow-water content of 167-406 mm,while in the open grassland this occurred for some 20 days less,with maximum depth 65-122 cm,and snow-water content 143-288 *** snow-water captured in the canopy reached a maximum 27%of that registered on the ground;the loss of intercepted snow by sublimation was approximately 26% of the annual *** the high melt period(April-May),the degree-day factor in the forest stand achieved 60%of values observed in the grassland(2.3-3.5 against 3.8-6.0 mm℃^(-1)day^(-1)).The hydrological model BROOK 90 was employed to analyse potential water resources recharge,and flood risk at *** the normal climate season,snow-melt runoff from the forest exceeded the grassland by 22%(225 against 185 mm).In extreme situations,the maximum daily runoff from snow-melt in the grasslands(57 mm day^(-1))exceeded 2.6 times the values in spruce forest(22 mm day^(-1)).

关键词： Spruce boreal forest Snow-depth Snow-water content Canopy interception Snowmelt Degree-day factor BROOK 90 Runoff distribution

Percutaneous resection of upper tract urothelial cell carcinoma:When,how,and is it safe?

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Asian Journal of Urology 2016年第3期3卷 134-141页

作者： Willem e.Strijbos Bart van der Heij Department of Urology Zuyderland Medical CentreHeerlenThe Netherlands

Introduction:In the management of upper tract urothelial cell carcinoma(UTUC)endoscopic,nephron sparing procedures like ureterorenoscopy(URS)or percutaneous tumour resection(PCTR)still play a very limited *** could lead to possible unnecessary radical nephroureterectomies(RNU),still being the gold standard *** risk of chronic kidney disease(CKD)later in life is *** this study we present the results of 24-year experience with PCTR in a single ***:We identified 44 patients who underwent PCTR between 1992 and *** resection was achieved in 40 patients who were included in this *** and clinical data,including tumour recurrence,progression to RNU,tumour grade and overall survival(OS)were retrospectively *** outcome analysis was ***:Median age at diagnosis was 68 years(range 42-94 years).Low grade tumours were found in 37 patients(92.5%)and high grade tumours in three patients(7.5%).Median followup was 53 months during which 20 patients developed upper tract recurrences(50.0%).The longest time to recurrence was 97 *** follow-up 11 patients(27.5%)underwent an RNU and two patients died from *** could be avoided in 29 patients(72.5%).In this study we found that multifocality is a significant risk factor for recurrence,but not for stage progression to ***:PCTR is a surgically and oncologically safe *** preservation in patients with UTUC who are eligible for percutaneous resection can be achieved in the majority of *** criteria for PCTR should be further refined,leading to a wider application of PCTR in the ***-up needs invasive procedures and should be long term.

关键词： Percutaneous tumour resection PCTR UTUC endoscopic management Upper tract urothelial cell carcinoma Tumour surface area

基于ISM-AHP-entropy航空公司风险因素研究

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航空计算技术 2024年第2期54卷 26-31页

作者：罗凤娥徐勇卫昌波杜裕鑫中国民用航空飞行学院四川广汉618000

针对航空公司风险因素研究,引入ISM-AHP-entropy综合评价方法对风险因素进行评价。构建了风险因素指标体系,利用解析结构模型(ISM)将因素指标分为表层和深层致因,构建结构模型;根据问卷结果,用AHP-entropy求出综合权重,结果表明人因和... 详细信息

针对航空公司风险因素研究,引入ISM-AHP-entropy综合评价方法对风险因素进行评价。构建了风险因素指标体系,利用解析结构模型(ISM)将因素指标分为表层和深层致因,构建结构模型;根据问卷结果,用AHP-entropy求出综合权重,结果表明人因和管理因素对风险影响最为显著;进一步运用AHP-entropy综合法分别计算表层和深层致因权重并分析,结果表明表层致因中机组资源管理水平、签派员应急处置能力影响最为显著,深层致因中安全规章方针的制定情况、应急管理培训与实施情况影响最为显著;从多个现实角度出发,结合CBTA理念,为航空公司降低风险、提高安全意识与水平提出多条建议,可供航空公司参考采纳。

关键词：交通工程航空公司风险因素层次分析法熵值法解释结构模型

水溶性量子点的制备及其与壳聚糖衍生物的自组装

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高等学校化学学报 2007年第1期28卷 169-172页

作者：徐海娥闫翠娥湖北大学化学化工学院武汉430062

以3-巯基丙酸(HS-CH2CH2COOH)为稳定剂,制备了水溶性的碲化镉(CdTe)量子点(QD s),考察了制备条件对QD s荧光性能的影响及CdTe QD s与壳聚糖及叶酸和聚乙二醇改性的壳聚糖的自组装.研究发现,壳聚糖及改性壳聚糖与QD s的复合物荧光强度相... 详细信息

以3-巯基丙酸(HS-CH2CH2COOH)为稳定剂,制备了水溶性的碲化镉(CdTe)量子点(QD s),考察了制备条件对QD s荧光性能的影响及CdTe QD s与壳聚糖及叶酸和聚乙二醇改性的壳聚糖的自组装.研究发现,壳聚糖及改性壳聚糖与QD s的复合物荧光强度相对纯的CdTe QD s明显增强,且QD s被包裹在内核,复合粒子呈明显的核/壳结构.改性壳聚糖/QD s复合物较小且尺寸分布更为均一.

关键词：水溶性量子点壳聚糖壳聚糖衍生物自组装

An approach to quantifying the plausibility of the inadvertent download defence

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Forensic Sciences Research 2016年第1期1卷 28-32页

作者： Richard e.Overill Kam-Pui Chow Department of Informatics King’s College LondonLondonUK Department of Computer Science University of Hong KongPokfulamHong KongChina

A table of 95%confidence limits on the probabilities for randomly downloading relatively small numbers of illegal images or sensitive documents amongst a relatively large number of other images or documents has been *** is anticipated that these data will assist prosecution officials in arriving at a decision as to whether or not there is a reasonable likelihood of a successful criminal prosecution when the inadvertent download defence is employed in cases of possession of child pornography,terrorist material or espionage-related *** same data can also be used by defence counsels to assess the strength of the prosecution’s case.

关键词： Forensic science probability theory confidence interval binomial distribution,inadvertent download defence possession of child pornography counter terrorism counter espionage

ANeMIA AND BLOOD BOOSTING

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中国运动医学杂志 2002年第5期21卷 537-543页

作者： e.Randy eichner,M.D. Department of Medicine University of Oklahoma Health Sciences Center Oklahoma City Department of Medicine University of Oklahoma Health Sciences Center Oklahoma City Oklahoma Oklahoma

Superelastic properties of nanocrystalline NiTi shape memory alloy produced by thermomechanical processing

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Transactions of Nonferrous Metals Society of China 2018年第3期28卷 515-523页

作者： e.MOHAMMAD SHARIFI A.KeRMANPUR Department of Materials engineering Malek Ashtar University of Technology Department of Materials engineering Isfahan University of Technology

effects of thermomechanical treatment of cold rolling followed by annealing on microstructure and superelastic behavior of the Ni50Ti50 shape memory alloy were *** specimens were produced by copper boat vacuum induction *** homogenized specimens were hot rolled and annealed at 900°***,annealed specimens were subjected to cold rolling with different thickness reductions up to 70%.Transmission electron microscopy revealed that the severe cold rolling led to the formation of a mixed microstructure consisting of nanocrystalline and amorphous phases in Ni50Ti50 *** annealing at 400°C for 1 h,the amorphous phase formed in the cold-rolled specimens was crystallized and a nanocrystalline structure *** showed that with increasing thickness reduction during cold rolling,the recoverable strain of Ni50Ti50 alloy was increased during superelastic experiments such that the 70%cold rolled-annealed specimen exhibited about 12%of recoverable ***,with increasing thickness reduction,the critical stress for stress-induced martensitic transformation was *** is noteworthy that in the 70%cold rolled-annealed specimen,the damping capacity was measured to be 28 J/cm3 that is significantly higher than that of commercial NiTi alloys.

关键词： nanocrystalline material shape memory alloy superelasticity thermomechanical processing