检索结果-南通市图书馆

Review of preventive and constructive measures for coal mine explosions:An Indian perspective

在线全文

学校读者我要写书评

暂无评论

International Journal of Mining Science and Technology 2022年第3期32卷 471-485页

作者： Santosh kumar Ray Asfar Mobin Khan niroj kumar mohalik Debashish Mishra Somu Mandal Jai Krishna Pandey CSIR-Central Institute of Mining and Fuel Research Barwa RoadDhanbad 826015India Academy of Scientific and Innovative Research(AcSIR) Ghaziabad 201002India

Firedamp and coal dust explosion constitute a lion’s share in mine accidents in a global mining *** paper reports a list of mine explosion disasters since last two decades,a critical review of the different prevention and constructive measures,and its recent development to avoid firedamp and coal dust *** legislation in core coal-producing countries,***,USA,Australia,South Africa,and India related to firedamp and coal dust explosion are critically *** occurred due to explosion after Nationalisation of Coal Mines(1973)in India are *** and constructive measures adopted in India are critically analysed with respect to the global mining *** like methane credit concept,classification of mines/seams with respect to explosion risk zone,deflagration index;installation of automatic fire warning devices,canopy air curtain technology,explosion-prevention measures,such as fire-retardant materials,inhibitors,extinguishing agent,dust suppressor,and active explosion barrier are discussed in detail to avoid explosion and thereby adhering to zero accident policy due to coal mine explosion.

关键词： Firedamp explosion Coal dust explosion Preventive measures Constructive measures Legislation

CFD modeling to study the effect of particle size on dispersion in 20l explosion chamber: An overview

在线全文

学校读者我要写书评

暂无评论

International Journal of Mining Science and Technology 2020年第3期30卷 321-327页

作者： Santosh kumar Ray niroj kumar mohalik Asfar Mobin Khan Debashish Mishra Nikhil kumar Varma Jai Krishna Pandey Pradeep kumar Singh CSIR-Central Institute of Mining and Fuel Research Dhanbad 826001India

Mine disasters occur predominantly due to methane or coal dust explosion or a combination of *** the top ten worst coal mine disasters in India, nine are due to coal dust explosion. The current paper describes a general overview of the parameters causing dispersion leading to coal dust explosion,and computational fluid dynamics(CFD) simulation study to observe the effects of particle size on dispersion in Indian coal mines. Turbulent kinetic energy(TKE) and velocity vector path of dust-air mixture and dust-free air were simulated to understand their effects on coal dust dispersion. The TKE contours and velocity vector paths for dust-free air were uniform and symmetrical due to resistance-free path available. The TKE contours and velocity vector paths for dust-air mixture shows the asymmetrical distribution of contours, due to entrainment of air with dust particles. Vortices were observed in velocity vector paths which gradually diminish on increment of time sequence. These vortices are dead centres where velocity and coal dust particles concentration are both zero.

关键词： Coal dust explosibility CFD 20l explosion chamber Dispersion Turbulent kinetic energy

Long Lead-Time Streamflow Forecasting Using Oceanic-Atmospheric Oscillation Indices

在线全文

学校读者我要写书评

暂无评论

Journal of Water Resource and Protection 2014年第6期6卷 635-653页

作者： niroj kumar Shrestha Department of Agriculture and Biological Engineering University of Florida Immokalee USA

Climatic variability influences the hydrological cycle that subsequently affects the discharge in the stream. The variability in the climate can be represented by the ocean-atmospheric oscillations which provide the forecast opportunity for the streamflow. Prediction of future water availability accurately and reliably is a key step for successful water resource management in the arid regions. Four popular ocean-atmospheric indices were used in this study for annual streamflow volume prediction. They were Pacific Decadal Oscillation (PDO), El-Nino Southern Oscillation (ENSO), Atlantic Multidecadal Oscillation (AMO), and North Atlantic Oscillation (NAO). Multivariate Relevance Vector Machine (MVRVM), a data driven model based on Bayesian learning approach was used as a prediction model. The model was applied to four unimpaired stream gages in Utah that spatially covers the state from north to south. Different models were developed based on the combinations of oscillation indices in the input. A total of 60 years (1950-2009) of data were used for the analysis. The model was trained on 50 years of data (1950-1999) and tested on 10 years of data (2000-2009). The best combination of oscillation indices and the lead-time were identified for each gage which was used to develop the prediction model. The predicted flow had reasonable agreement with the actual annual flow volume. The sensitivity analysis shows that the PDO and ENSO have relatively stronger effect compared to other oscillation indices in Utah. The prediction results from the MVRVM were compared with the Support Vector Machine (SVM) and the Artificial Neural Network (ANN) where MVRVM performed relatively better.

关键词： Oscillation Indices Streamflow Lead-Time Prediction

Landslide Distribution and Processes in the Hills of Central Nepal: Geomorphic and Statistical Approach to Susceptibility Assessment

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Geoscience and Environment Protection 2020年第12期8卷 276-302页

作者： Motilal Ghimire niroj Timalsina Central Department of Geography Tribhuvan University Kathmandu Nepal International Center for Integrated Mountain Development (ICIMOD) Kathmandu Nepal

The study examined the landslide distribution, processes, and susceptibility of the Lalbakaiya watershed using GIS and remote sensing technology. Inventory of landslides was done using high-resolution satellite imagery available on Google Earth and was verified and further investigated during the field visit. Geomorphic as well as statistical approaches were applied to assess landslides susceptibility and the significance of their outputs was discussed. Map layers representing conditioning and triggering factors of landslide occurrence were produced from various spatial data sources. The study found that the landslide of the Lalbakaiya watershed is primarily controlled by geology representing young, weak, fragile, and weathered sedimentary rocks. Besides, the role of topography such as steep slope, high relative relief, and land use and land cover played an important role in determining the landslide susceptibility. These processes are triggered by monsoon precipitation, seismicity, and land use change in addition to other factors. The geomorphic approach produces a reliable landslide susceptible map as evidenced by past and present (active) failures on a landscape unit, but this map has low predictability of the landslides occurrence. In contrast, the landslide susceptibility map derived from the landslide index method fairly conforms with that derived from the geomorphic approach. Susceptibility calculated by landslide index map is represented by a pixel value that indicates a probability of landslides occurrence, and is amenable to group into various susceptible classes. The model can predict areas of landslides based on quantitative relation between landslides and geo-ecological factors. The limitation of this approach is that these susceptible areas do not represent clearly defined landscape units, and can also overlook highly erodible areas where landslides are not apparent despite severe erosion and numerous minor failures. The study confirms that both geomor

关键词： Landslide Chure Hills Susceptibility Watershed

血液透析患者营养状况的评估、监测与评价及营养状况与透析充分性关系的研究

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

血液透析患者营养状况的评估、监测与评价及营养状况与透析充分性...

作者： niroj Mali 昆明医科大学

学位级别：硕士

第一部分应用人体测量学指标、生化参数和改良主观定量评估法（MQSGA）评估血液透析患者营养支持的效果目的营养不良在血液透析患者中普遍存在,并与较高的发病率和死亡率有关。本研究采用人体测量学指标、生化参数和改良主观定量评估法... 详细信息

第一部分应用人体测量学指标、生化参数和改良主观定量评估法（MQSGA）评估血液透析患者营养支持的效果目的营养不良在血液透析患者中普遍存在,并与较高的发病率和死亡率有关。本研究采用人体测量学指标、生化参数和改良主观定量评估法（MQSGA）对维持性血液透析患者的营养支持效果进行评估。方法这个前瞻性观察研究共纳入62例患者（男32例,女30例;平均年龄49.81±13.86岁）,随机分为完全营养支持组（第1组）和部分营养支持组（第2组）,观察时间为2021年1月至2021年12月。在血液透析的第1个月和第12个月测量患者的人体测量学指标、MQSGA评分和生化参数。在完全营养支持和部分营养支持下维持性血液透析1年后,比较MQSGA评分;人体测量学指标包括:体重指数（BMI）、三头肌皮褶厚度（TSFT）、上臂围（MAC）和握力（HGS）及上臂肌围（MAMC）;生化指标包括:血清白蛋白（ALB）、血钙、血磷、甲状旁腺激素（IPTH）、血红蛋白（HGB）、甘油三酯（TG）、血清铁（Fe）、低密度脂蛋白（LDL）。结果本研究共纳入患者62例,其中男32例,女30例,年龄23～78岁,平均（49.81±13.86）岁。所有患者都完成了这项研究。表1显示了参与研究的患者的人口统计学数据。随机将患者分为完全营养支持组（40例）和部分营养支持组（22例）。第1组的中位年龄为51岁,相对年龄更大（范围:27-78岁）。第2组的中位年龄为47岁（范围:23-71岁）。在性别上,第1组和第2组患者分别为35%和81.8%的男性。MQSGA评分与MIS评分呈正相关（r=0.618,p:0.001）,而白蛋白（r=-0.282,p:0.027）、握力（r=-0.376,p:0.003）、干体重（r=-0.275,p:0.030）均与MQSGA评分呈负相关。治疗1年后,第1组iPTH、BMI、MQSGA评分、MIS降低,握力、干体重、白蛋白、Kt/Vurea、MAMC、TC、Hb升高,差异有统计学意义（P＜0.05）。第2组,MAMC、MAC、Hb、握力均下降,TC 升高（P＜0.05）。结论提供全面的营养支持能明显改善血液透析患者的整体营养状况,减少营养不良。同时,血液透析患者的营养状况可以通过MQSGA评分和人体测量学指标来评估。第二部分是否合并糖尿病对血液透析患者营养状况与透析充分性关系的研究目的根据血液透析患者是否合并糖尿病,分析其与营养状况、透析充分性的关系。为提高糖尿病肾脏病维持性血液透析患者的存活率和生活质量,分析透析充分性指数（Kt/V）与营养参数的关系。方法选取2021年1月至2021年12月在昆明医科大学第一附属医院肾内科血液净化中心进行维持性血液透析的患者121例。采用改良主观定量评估法（MQSGA）对两组患者进行营养评估。收集血清白蛋白（ALB）、总胆固醇（TC）、血肌酐（Scr）、血尿素氮（BUN）等实验室指标。人体测量包括体重指数（BMI）、三头肌皮褶厚度（TSFT）、上臂围（MAC）和握力（HGS）,测量工具包括握力计、软尺和皮下脂肪计。计算KT/V和尿素还原率（URR）。结果本研究共纳入121例患者,其中糖尿病肾病（DKD）组29例（23.96%）,非糖尿病肾病（NDKD）组 92 例（76.04%）。男 63 例,女 58 例,平均年龄（53.76±14.35）岁,75 例（61.98%）有不同程度的营养不良,仅46例（38.02%）营养良好。DKD组营养不良率为68.96%,明显高于NDKD组（59.7%）。DKD组与NDKD组比较,性别、年龄差异有统计学意义（P＜0.05）。DKD组MQSGA营养不良评分和营养不良发生率均高于NDKD组。DKD 组握力、MAC、MAMC 低于 NDKD 组,P＜0.05,SCr、ALB、TC、BUN 低于 NDKD组,差异有统计学意义（P＜0.05）。营养相关指标比较显示,透析充分组的ALB、TC、BUN、MIS（营养不良炎症评分）均高于透析不充分组（P＜0.05）。透析充分组的握力、TSF、MAC、MAMC、BMI、干体重、中性粒细胞/淋巴细胞比值（NLR）、血小板/淋巴细胞比值（PLR）均低于透析不充分组。握力、MAC、MAMC、BMI、干体重、NLR均有显著性差异（P＜0.05）。经Pearson相关分析,Kt/V与白蛋白（r=0.181）、总胆固醇（r=0.229）呈低度正相关,与白蛋白、总胆固醇呈显著正相关（P＜0.05）。结论维持性血液透析患者营养不良发生率较高,约61.98%的患者存在不同程度的营养不良。相较于非糖尿病肾病,维持性血液透析的糖尿病肾病患者营养不良发生率更高,营养不良更为严重,且透析充分性相对较差。透析充分性与营养状况评估指标显著相关。根据这些结果,应对维持性血液

关键词：营养评估人体测量 MQSGA 营养不良血液透析糖尿病肾病血液透析患者营养状况透析充分性

Effect of plasma treatment on the seed germination and seedling growth of radish(Raphanus sativus)

同方学位论文库评论

在线全文

同方学位论文库

学校读者我要写书评

暂无评论

Plasma Science and Technology 2022年第1期24卷 95-107页

作者： Rajesh Prakash GURAGAIN Hom Bahadur BANIYA Santosh DHUNGANA Ganesh Kuwar CHHETRI Binita SEDHAI niroj BASNET Aavash SHAKYA Bishnu Prasad PANDEY Suman Prakash PRADHAN Ujjwal Man JOSHI Deepak Prasad SUBEDI Department of Physics School of SciencesKathmandu UniversityDhulikhelKavre 45210Nepal Department of Physics Tri-Chandra Multiple CampusTribhuvan UniversityKathmandu 44600Nepal Department of Chemical Science and Engineering Kathmandu UniversityDhulikhelKavre 45210Nepal Department of Environmental Science and Engineering Kathmandu UniversityDhulikhelKavre 45210Nepal

The effect on the germination and seedling growth of radish(Raphanus sativus)seeds were examined employing a dielectric barrier discharge(DBD)at atmospheric pressure and room temperature for various treatment *** plasma using argon gas of flow rate 21 m^(-1)was employed in this *** seeds were treated with DBD plasma for 1-5 min,*** characteristics,seedling growth parameters,the contact angle of the seed coat,water uptake capacity,mass loss,the temperature of the seeds,chlorophyll,and carotenoid contents of the seedlings were measured before and after the DBD plasma *** treatment of radish seeds significantly increased germination-related characters,including germination percentage,fresh and dry weight,vigor index,and total carotenoids ***,the cumulative production rate was found to be *** from the experiment indicate an acceleration in the water uptake of the radish seeds and make the seed surface hydrophilic by plasma *** electron microscopy analysis showed that etching effects on the seed coat occurred after the argon plasma treatments,which affected the wettability of the radish *** experimental findings showed that seeds being treated by DBD plasma for 2 and 3 min had a positive effect on the germination and seedling growth of radish.

关键词： dielectric barrier discharge(DBD) electron temperature electron density germination growth parameters radish seeds

低HDL-C对2型糖尿病肾脏疾病患者肾功能的影响

在线全文

学校读者我要写书评

暂无评论

中国老年学杂志 2023年第16期43卷 3933-3936页

作者：张静樊文星陈广梅苏凤 Mali niroj 昆明医科大学第一附属医院肾脏内科云南昆明650032 昆明医科大学第一附属医院病案统计科云南昆明650032

目的探讨低水平高密度脂蛋白胆固醇(HDL-C)对2型糖尿病肾脏疾病(DKD)患者肾功能的影响。方法选取2017年9月至2019年9月在昆明医科大学第一附属医院肾内科住院确诊的2型DKD患者330例,依据肾小球滤过率(eGFR)分为3组,DKD 1~2期为A组,DKD ... 详细信息

目的探讨低水平高密度脂蛋白胆固醇(HDL-C)对2型糖尿病肾脏疾病(DKD)患者肾功能的影响。方法选取2017年9月至2019年9月在昆明医科大学第一附属医院肾内科住院确诊的2型DKD患者330例,依据肾小球滤过率(eGFR)分为3组,DKD 1~2期为A组,DKD 3~4期为B组,DKD 5期(终末期肾衰竭)为C组。分析3组一般资料、临床表现、实验室指标的差异性;血脂指标与eGFR进行相关性分析;以A组为参照,Logistic回归分析2型DKD B、C组eGFR的影响因素及创建低水平HDL-C对eGFR的影响。结果①与A组比较,B、C组eGFR下降,血肌酐(Scr)、24 h尿蛋白升高,血红蛋白(Hb)下降,差异有统计学意义(P<0.05);C组总胆固醇(TC)、低密度脂蛋白胆固醇(LDL-C)、HDL-C低于A、B两组,肌酐(UACR)高于A、B组,差异有统计学意义(P<0.05);C组低水平HDL-C人群比例显著高于B组,而高水平TC人群比例显著高于A组(P<0.017);B、C组糖尿病病程(DD)、高血压人群比例显著高于A组(P<0.05);②各组TC、LDL-C、HDL-C与eGFR均显著相关(P<0.01);③多元Logistic回归分析,在调整混杂因素后,低水平HDL-C是DKD 5期的独立影响因素;高血压、贫血、血尿酸(UA)、24 h尿蛋白也与其独立相关。④在低HDL-C与eGFR间关系的所有回归模型中,低水平HDL-C均与DKD 5期独立相关;调整所有混杂因素后,低HDL-C人群终末期肾衰竭患病率显著高于正常水平HDL-C人群(OR=4.96)。结论HDL-C随2型DKD患者肾功能下降而逐渐降低;低水平HDL-C是2型DKD患者终末期肾衰竭的独立危险因素。

关键词： 2型糖尿病糖尿病肾脏疾病(DKD) 高密度脂蛋白胆固醇(HDL-C) 肾小球滤过率(eGFR)

利拉鲁肽通过抑制核因子κB对糖尿病肾病小鼠的治疗作用

在线全文

学校读者我要写书评

暂无评论

中国老年学杂志 2022年第24期42卷 6071-6074页

作者：张静樊文星杨玥娜苏凤 Mali niroj 昆明医科大学第一附属医院肾脏内科云南昆明650032 昆明医科大学

目的观察利拉鲁肽对糖尿病肾病(DN)小鼠的治疗作用,并探讨其治疗机制。方法6周龄C57BL/6雄性小鼠30只随机分为正常对照组、DN组、利拉鲁肽组,每组10只。DN组、利拉鲁肽组腹腔注射链脲佐菌素(STZ)溶液并喂养高脂饲料建立DN模型。DN模型... 详细信息

目的观察利拉鲁肽对糖尿病肾病(DN)小鼠的治疗作用,并探讨其治疗机制。方法6周龄C57BL/6雄性小鼠30只随机分为正常对照组、DN组、利拉鲁肽组,每组10只。DN组、利拉鲁肽组腹腔注射链脲佐菌素(STZ)溶液并喂养高脂饲料建立DN模型。DN模型小鼠建立成功后,利拉鲁肽组每日腹腔注射200μg/kg利拉鲁肽,DN组及正常对照组腹腔注射等量的生理盐水,3组连续干预6 w。实验结束后称体重,收集血液、尿液、肾脏标本,自动生化分析仪检测血糖(GLU)、总胆固醇(TC)、三酰甘油(TG)、高密度脂蛋白(HDL)、低密度脂蛋白(LDL)及尿素(UR)、肌酐(CR)和尿酸(UA)及尿中微量白蛋白尿(MAU)、N-乙酰基-β-D-氨基葡萄糖苷酶(NAG)。实时荧光定量聚合酶链反应(qRT-PCR)检测肾组织中核因子(NF)-κB信使核糖核酸(mRNA)表达。Western印迹检测肾组织中NF-κB蛋白的表达。结果利拉鲁肽组GLU、TC、TG、LDL及体重显著低于DN组(P<0.05),而HDL显著高于DN组(P<0.05)。利拉鲁肽组MAU和NAG显著低于DN组(P<0.05),此外,利拉鲁肽组UR、CR和UA显著低于DN组(P<0.05)。与DN组相比,利拉鲁肽组NF-κB mRNA和蛋白表达明显降低(P<0.05)。结论利拉鲁肽改善DN小鼠血糖、血脂,并通过抑制NF-κB的基因和蛋白质的表达改善DN小鼠肾脏损伤。

关键词：糖尿病肾病利拉鲁肽核因子κB 炎症因子

己酮可可碱联合ACEI/ARB类药物治疗糖尿病肾脏病的临床疗效和安全性Meta分析

在线全文

学校读者我要写书评

暂无评论

中华肾病研究电子杂志 2021年第3期10卷 144-153页

作者：马靖媛樊文星 Mali niroj 葛杰昆明医科大学第一附属医院肾脏内科 650032

目的系统评价己酮可可碱联合血管紧张素转化酶抑制剂(ACEI)/血管紧张素受体拮抗剂(ARB)类药物治疗糖尿病肾脏病的临床疗效及安全性,为己酮可可碱治疗糖尿病肾脏病提供新的循证依据。方法检索中国期刊全文数据库、万方数据库、EMBASE、Pu... 详细信息

目的系统评价己酮可可碱联合血管紧张素转化酶抑制剂(ACEI)/血管紧张素受体拮抗剂(ARB)类药物治疗糖尿病肾脏病的临床疗效及安全性,为己酮可可碱治疗糖尿病肾脏病提供新的循证依据。方法检索中国期刊全文数据库、万方数据库、EMBASE、PubMed、Cochrane Library等中外文数据库。检索起止时间为建库起至2021年2月20日,所有纳入的文献都属于随机对照试验。比较治疗组(己酮可可碱+常规治疗联合ACEI/ARB)和对照组(常规治疗联合ACEI/ARB)对患者的尿蛋白、肾功能、糖代谢、血压和不良反应的差异。采用Rev Man 5.3进行Meta分析。结果总共纳入18项随机对照试验,共1401例2型糖尿病肾脏病患者,治疗组724例,对照组677例。Meta分析结果显示:与对照组相比,治疗组能明显降低患者24 h尿蛋白(WMD=-0.53,95%CI:-0.58~-0.49,P<0.001)、收缩压(WMD=-1.97,95%CI:-3.51~-0.44,P=0.01)、空腹血糖(WMD=-0.32,95%CI:-0.58~-0.06,P=0.01)、糖化血红蛋白(WMD=-0.2,95%CI:-0.32~-0.08,P<0.01),两组均未发现严重不良反应。结论己酮可可碱联合ACEI/ARB类药物在改善糖尿病肾脏病患者蛋白尿、收缩压、糖代谢方面优于单独应用ACEI/ARB类药物,具有较好的临床疗效。仍需要高质量、多中心、大样本的临床随机对照试验进行证实。

关键词：糖尿病肾脏病己酮可可碱血管紧张素转化酶抑制剂血管紧张素受体拮抗剂临床疗效 Meta分析