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Evaluation and optimization of blasting approaches to reducing oversize boulders and toes in open-pit mine 被引量:8
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作者 Zhendong Leng Yong Fan +1 位作者 Qidong Gao Yingguo Hu 《International Journal of Mining Science and Technology》 SCIE EI CSCD 2020年第3期373-380,共8页
A new blasting approach of combined blastholes with different diameters is proposed to solve the problems of oversize boulders and rock toes in open-pit mine. A non-ideal detonation model and a statistical damage cons... A new blasting approach of combined blastholes with different diameters is proposed to solve the problems of oversize boulders and rock toes in open-pit mine. A non-ideal detonation model and a statistical damage constitutive model are implemented in dynamic finite element analysis to investigate the formation mechanism of oversize boulders and toes. The damage distribution and evolution process of rock blasting fragmentation is simulated, and the scheme is further optimized. Numerical analysis results showed that pocket charges and satellite blastholes can only improve bench top fragmentation, but they cannot reduce the oversize in the middle and bottom of bench as well as the toe problem. The new blasting approach of combined blastholes with different diameters can effectively reduce the oversize boulders and toes as well as the production costs. 展开更多
关键词 Rock blasting Blasthole diameter oversize boulders Rock toes Damage distribution
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Oversize时装的美学价值研究 被引量:1
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作者 宋德风 姜振川 《西部皮革》 2021年第15期63-63,73,共2页
时尚是一个轮回,在每个时代都会有自己的流行风格与印记。如今,时尚界掀起了一股Oversize的热潮。伴随着这股热潮,Oversize时装成为当下年轻人最喜欢的一种着装风格,且满足了人们对多样化服装美学的追求。本文从Oversize时装的形式美、... 时尚是一个轮回,在每个时代都会有自己的流行风格与印记。如今,时尚界掀起了一股Oversize的热潮。伴随着这股热潮,Oversize时装成为当下年轻人最喜欢的一种着装风格,且满足了人们对多样化服装美学的追求。本文从Oversize时装的形式美、内在美、个性美、流行美四方面入手,结合国际品牌的时装案例进行分析,进一步地挖掘、探索Oversize时装的美学价值。 展开更多
关键词 oversize 时装 美学价值
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A new procedure for determining dry density of mixed soil containing oversize gravel
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作者 Hamed Farshbaf AGHAJANI Masoud Ghodrati YENGEJEH +1 位作者 Amirmohammad KARIMZADEH Hossein SOLTANI-JIGHEH 《Journal of Central South University》 SCIE EI CAS CSCD 2018年第12期2841-2856,共16页
This paper presents a novel computational procedure for the maximum dry density of mixed soils containing oversize particles.At first,the large-scale compaction test data for mixed soils are analyzed by an artificial ... This paper presents a novel computational procedure for the maximum dry density of mixed soils containing oversize particles.At first,the large-scale compaction test data for mixed soils are analyzed by an artificial neural network to determine the main factors affecting the compaction.These factors are then imposed on a genetic programming method and a new mathematical equation emerges.The new equation has more conformity with the experimental data in comparison with the previous correction methods.Besides,the mixed soil dry density is associated with most base soil and oversize fraction specifications.With regard to the sensitivity analyses,if the mixed soil contains high percentages of oversize fraction,the mixed soil composition is governed by the specification of oversized grains,such as specific gravity and the maximum grain size and by increasing these factors,the mixed soil dry density is increased.In mixed soil with a low content of oversize,the base soil specification mainly controls the compaction behavior of mixed soil.Furthermore,if the base soil is inherently compacted with greater dry density,adding the oversize slightly improves the mixed soil dry density.In contrast,adding oversized grains to the base soil with a lower dry density produces a mixed soil with greater dry density.By increasing the maximum grain size difference between the oversize fraction and base soil,the dry density of mixed soil is enhanced. 展开更多
关键词 mixed soil oversize COMPACTION genetic programming artificial neural network
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Prognostic value of the ratio between prosthesis area and indexed annulus area measured by MultiSlice-CT for transcatheter aortic valve implantation procedures 被引量:1
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作者 Nicolas Debry Arnaud Sudre +6 位作者 Ihrahim Elquodeimat Cedric Delhaye Guillaume Schurtz Antoine Bical Mohamad Koussa Khalil FaRouch Thomas Modine 《Journal of Geriatric Cardiology》 SCIE CAS CSCD 2016年第6期483-488,共6页
Background Postprocedural aortic regurgitations following transcatheter aortic valve implantation (TAVI) procedures remain an is- sue. Benefit of oversizing strategies to prevent them isn't well established. We com... Background Postprocedural aortic regurgitations following transcatheter aortic valve implantation (TAVI) procedures remain an is- sue. Benefit of oversizing strategies to prevent them isn't well established. We compared different level of oversizing in our cohort of con- secutive patients to address if severe oversizing compared to normal sizing had an impact on post-procedural outcomes. Methods From January 2010 to August 2013, consecutive patients were referred for TAVI with preoperative Multislice-CT (MSCT) and the procedures were achieved using Edwards Sapien~ or Corevalve devices~. Retrospectively, according to pre-procedural MSCT and the valve size, pa- tients were classified into three groups: normal, moderate and severe oversizing; depending on the ratio between the prosthesis area and the annulus area indexed and measured on MSCT. Main endpoint was mid-term mortality and secondary endpoints were the Valve Academic Research Consortium (VARC-2) endpoints. Results Two hundred and sixty eight patients had a MSCT and underwent TAVI procedure, with mainly Corevalve~. While all-cause and cardiovascular mortality rates were similar in all groups, post-procedural new pacemaker (PM) implantation rate was significantly higher in the severe oversizing group (P = 0.03), while we observed more in-hospital congestive heart-failure (P = 0.02) in the normal sizing group. There was a trend toward more moderate to severe aortic regurgitation (AR) in the normal sizing group (P = 0.07). Conclusions Despite a higher rate of PM implantation, oversizing based on this ratio reduces aortic leak with lower rates of post-procedural complications and a similar mid-term survival. 展开更多
关键词 Aortic regurgitation Aortic valve stenosis Multislice-CT Oversizing Transcatheter aortic valve implantation
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Successful emergency endovascular treatment of juxtarenal and infrarental mycotic aortic aneurysms in patients with small diameter aortae using Cook~ Zenith ESLE Stentgrafts 被引量:1
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作者 Chan YC Ting AC +1 位作者 Yiu WK Cheng SW 《World Journal of Emergency Medicine》 CAS 2012年第2期146-149,共4页
BACKGROUND:Endovascular repair of mycotic aneurysm is an alternative to open repair if the patho-anatomy is suitable. The aortic size above and below the mycotic aneurysm may be small. METHODS: A retrospective revie... BACKGROUND:Endovascular repair of mycotic aneurysm is an alternative to open repair if the patho-anatomy is suitable. The aortic size above and below the mycotic aneurysm may be small. METHODS: A retrospective review was made of prospectively collected departmenta computerised database. RESULTS: Three oriental patients with juxta- and infra-renal mycotic aortic aneurysms with a small aortic diameter of 17 mm to 18 mm underwent successful emergency endovascular treatment using Cook Zenith ELSE stentgraffs. These are ancillary devices aimed at iliac extensions usually. CONCLUSIONS: This is to our knowledge the first case series of Cook Zenith ELSE iliac component endografts for the treatment of aortic mycotic aneurysms with small aortae, and short- and mid-term results are encouraging. 展开更多
关键词 ENDOVASCULAR MYCOTIC Small aorta Oversizing Cook Zenith ESLE Stentgrafts
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Regression Models of the Impact of Rockmass and Blast Design Variations on the Effectiveness of Iron Ore Surface Blasting 被引量:1
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作者 Antipas Thadei Safari Massawe Karim Rajabu Baruti 《Engineering(科研)》 2011年第1期55-62,共8页
The desired economics of hard rock surface mining is mainly determined by the parameters of process design which minimize the overall cost per tonne of the rock mined in drilling, blasting, handling and primary crushi... The desired economics of hard rock surface mining is mainly determined by the parameters of process design which minimize the overall cost per tonne of the rock mined in drilling, blasting, handling and primary crushing in given rockmass conditions. The most effective parameters of process design could be established based on the regression models of the cumulative influence of rockmass and mine design parameters on the overall cost per tonne of the rock drilled, blasted, handled and crushed. These models could be developed from the huge data accumulated worldwide on the costs per tonne of hard rock surface mining in drilling, blasting, handling and primary crushing vs the parameters of rockmass and mine design. This paper only dwelt on the development of regression models for oversize generation, blasthole productivity and blasting cost for iron ore surface mines, whose data is available. The SPSS standard statistical correlation – regression analysis software was used in the analysis. Interpretation of the models generated shows that the individual effects of the determinant rockmass and blast design parameters on oversize generation, blasthole productivity and blasting cost are all in compliance with the findings of other researchers and the theory of explosive rock fragmentation and could be used for the estimation of oversize generation, blasthole productivity and blasting cost in rockmass and blast design conditions similar to those of the iron ore surface mines examined in this study. However, the regression models obtained here could not be used alone for the optimization of blast design because most of the determinant parameters also have conflicting effect on the other processes of drilling, handling and primary crushing the blasted rock. Also, the quality and content of the regression models could be enhanced further by increasing the content of rockmass and blast design parameters and the volume of data considered in the regression analysis. 展开更多
关键词 BLASTING EFFECTIVENESS oversize generation Blasthole PRODUCTIVITY BLASTING Cost Rockmass PARAMETERS BLAST Design PARAMETERS Regression Models
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GENETIC ACTIVITY OF CHLOROQUINE IN FUNGI
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作者 FranekiJ. Crebelli R. +1 位作者 BratuliN. AlaeviM. 《癌变.畸变.突变》 CAS CSCD 1991年第S1期38-38,共1页
The exposure of both stationary and exponential pha-se cells of Saccharomyces cerevisiae diploid strainD6 to 0.15-1.5mg/ml chloroquine (ClQ) produced adose-related increase of putative monosomic,whitecycloheximide res... The exposure of both stationary and exponential pha-se cells of Saccharomyces cerevisiae diploid strainD6 to 0.15-1.5mg/ml chloroquine (ClQ) produced adose-related increase of putative monosomic,whitecycloheximide resistant colonies,and no increase ofmitotic recombinants (cross-overs).The effect obser-ved was specifically induced in strain D6.In fact, 展开更多
关键词 CEREVISIAE SACCHAROMYCES putative DIPLOID overs stationary exponential specifically exposure LEUCINE
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ON THE DRIVING BEHAVIOR,VARIABLE-DIAMETEREFFECT AND BEAKING CAPACITY OF DRIVENCAST-IN-SITU PILE WITHFLAT
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作者 Shi Peidong , Fu Zhenqiu , Zhan Xiaoying Zhejing Academy of Building Research, Hangzhou 3100l2, China Zia Jinzhang Tongji University, Shanghai 200092 , China 《西部探矿工程》 CAS 1995年第5期66-71,共6页
ONTHEDRIVINGBEHAVIOR,VARIABLE-DIAMETEREFFECTANDBEAKINGCAPACITYOFDKIVENCAST-IN-SITUPILEWITHFLATOVERSIZETIPShi... ONTHEDRIVINGBEHAVIOR,VARIABLE-DIAMETEREFFECTANDBEAKINGCAPACITYOFDKIVENCAST-IN-SITUPILEWITHFLATOVERSIZETIPShiPeidong,FuZhenqiu... 展开更多
关键词 PILE TIP flat oversize TIP DRIVEN CAST-IN-SITU PILE driving behavior variable-diameter effect bear-ing capacity settlensent
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美国《保健物理》(Health Physics)杂志英文摘要(2022年122卷第4期)
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《辐射防护》 CAS CSCD 北大核心 2022年第3期261-264,共4页
A Risk Comparison between Lifestyle,Socioeconomic Status,and Radiation:A Cohort Study of Cancer Mortality among Japanese Nuclear Workers (J-EPISODE)Shin’ichi Kudo1,Akemi Nishide1,2,Hiroshige Furuta1,Noboru Ishizawa1,... A Risk Comparison between Lifestyle,Socioeconomic Status,and Radiation:A Cohort Study of Cancer Mortality among Japanese Nuclear Workers (J-EPISODE)Shin’ichi Kudo1,Akemi Nishide1,2,Hiroshige Furuta1,Noboru Ishizawa1,Shin Saigusa1(1.Institute of Radiation Epidemiology,Radiation Effects Association;2.College of Life Sciences,Ibaraki Christian University,Ibaraki,Japan)Abstract:The health effects of low-dose radiation exposure have been a source of controversy.One possible reason is that epidemiological studies that compare radiation risk with other factors,such as lifestyle or socioeconomic status,have been limited.The aim of this study is to conduct a comparison of the cancer risk of mortality between radiation,lifestyle habits (such as smoking),and socioeconomic status (such as years of education) among Japanese nuclear workers.We assembled a cohort of41,742 male nuclear workers in Japan who answered a lifestyle questionnaire survey conducted during 2003-2004. 展开更多
关键词 英文摘要 overs JAPANESE
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Current consensus and controversies on male LUTS/BPH(part one)
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作者 Keong Tatt Foo 《Asian Journal of Urology》 2017年第3期137-137,共1页
It is an honor to be the guest editor of this special issue on Current Consensus and Controversy on Male Lower Urinary Tract Symptoms(LUTS)/Benign Prostatic Hyperplasia(BPH).As the title implies,one can write on a wid... It is an honor to be the guest editor of this special issue on Current Consensus and Controversy on Male Lower Urinary Tract Symptoms(LUTS)/Benign Prostatic Hyperplasia(BPH).As the title implies,one can write on a wide range of topics related to this urological problem that is common worldwide. 展开更多
关键词 BPH overs EDITOR
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Trucks at Roundabouts: A Synthesis Study
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作者 Pavan Kumar Chevuri 《Journal of Transportation Technologies》 2018年第1期65-74,共10页
Roundabouts in United States and other countries have been proved to be very successful, effective, and a safe traffic control treatment. Roundabouts in the context of regularly expected truck configuration have also ... Roundabouts in United States and other countries have been proved to be very successful, effective, and a safe traffic control treatment. Roundabouts in the context of regularly expected truck configuration have also been successful for effective roundabout designs;however, there are always some site specific issues for trucks accommodation at roundabouts. Therefore, there is a great need for an informational guide in the form of synthesis report for roundabout designs specific to unique trucking traffic activity. While there are not significant literatures and studies in this subject, there are few studies/reports spread out which address various issues in this subject area. This study attempts to synthesize the research and knowledge of truck accommodation at roundabouts by synthesizing various research studies, reports, and articles;various subject areas such as roundabout designs for trucking activity, roundabout designs and accommodation strategies for specialized trucking activity such as oversized trucks, truck safety at roundabouts, and motor carrier perspective of trucking at roundabouts have been analyzed and relevant knowledge has been synthesized. This synthesis can be useful o researchers, designers, planners, and decision makers to determine effective ways to address specific trucking related issues at a roundabout. 展开更多
关键词 Roundabouts and Trucks oversized Trucks RURAL INTERSECTIONS TRUCKING ISSUES at INTERSECTIONS
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China:an Active Player in World Farming Market
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作者 Wang Lili 《China's Foreign Trade》 2014年第7期11-12,共2页
As an active player in the global capital market,Chinese ompanies are making changes n the world farming market.The website of the Voice of Russia reported that the Chinese companies are busy in the world farm product... As an active player in the global capital market,Chinese ompanies are making changes n the world farming market.The website of the Voice of Russia reported that the Chinese companies are busy in the world farm product market with acquisition of farm product,food and beverage companies,for which over USD12 billion was spent last year. 展开更多
关键词 COMPANIES FARMING RUSSIA SPENT VOICE sector overse
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Determination of the Optimal Speed of Pultrusion for Large-Sized Composite Rods
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作者 Aleksandr Krasnovskii Iliya Kazakov 《Journal of Encapsulation and Adsorption Sciences》 2012年第3期21-26,共6页
The paper describes a mathematical model of the stress-strain state of polymer composite materials in the pultrusion process of large-sized products. The influence of the pull speed on the stress-strain state of the p... The paper describes a mathematical model of the stress-strain state of polymer composite materials in the pultrusion process of large-sized products. The influence of the pull speed on the stress-strain state of the products is investigated. To determine the maximum possible pull speed series of solutions at different pull speeds are obtained. Depending on the maximum strain in the cross section of the rod determined the optimal value of pulling speed. 展开更多
关键词 COMPOSITE Material PULTRUSION STRESS-STRAIN State PERMEABILITY oversized ROD
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A Winter to Remember
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作者 Robert Best 单祝堂 《语言教育》 1996年第11期45-46,共2页
According to the weather men last winter was one of theworst in living memory.We live in the depths of the country,and my whole family a-gree that it was certainly a winter we shall never forget.Snow be-gan to fall at... According to the weather men last winter was one of theworst in living memory.We live in the depths of the country,and my whole family a-gree that it was certainly a winter we shall never forget.Snow be-gan to fall at round about the beginning of the New Year and con-tinued on and off for approximately ten days.At first we were all thrilleds to see it.It fell silently and relent- 展开更多
关键词 BEGINNING WINTER WINTER NEVER FORGET weather depths DOING overs tamer
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Wide scope pollution-flashover of 500 KV transmission lines—causes and preventive countermeasures
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作者 Xiang Liren Su Zhiyi Li Peiguo Electric Power Research Institute,MOE Zhou Qingchang 《Electricity》 1991年第1期44-48,共5页
During two years odd period from Dec.1987 to Feb.1990,there had been repeatedly pollution-flashoverfailures on our 500 kV transmission lines,resulting in a wide scopeblackout.There were eleven 500 kV lines altogether ... During two years odd period from Dec.1987 to Feb.1990,there had been repeatedly pollution-flashoverfailures on our 500 kV transmission lines,resulting in a wide scopeblackout.There were eleven 500 kV lines altogether in North-east,East and North China power grids,where pollution-flashover failureshappened one after another on 36 transmission line towers (poles).Since 500 kV transmission lines are the main trunks of high 展开更多
关键词 strings repeatedly eleven PREVENTIVE adjustment GASES overs transm arouse umber
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爱情痛苦,爱情甜
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作者 覃先美 Thomas MacDonagh 《语言教育》 1996年第4期11-12,共2页
关键词 SWEET 中心意思 overs SWEET 重复率 AGAIN BLIND 中有 令人
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家禽饲料与猝死综合征的关系
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作者 孙永泰 《家禽科学》 2017年第3期19-20,共2页
猝死综合征(Sudden Death Svndrome,SDS)又称急性死亡综合征(ADS)、翻跳病(Fhp-overs Disease)等,是现代家禽养殖业中颇令人头疼的顽症之一。它不但可发生在肉仔鸡上,在火鸡、蛋鸡及肉种鸡上也均有发生。肉仔鸡3-35日龄多发;蛋鸡... 猝死综合征(Sudden Death Svndrome,SDS)又称急性死亡综合征(ADS)、翻跳病(Fhp-overs Disease)等,是现代家禽养殖业中颇令人头疼的顽症之一。它不但可发生在肉仔鸡上,在火鸡、蛋鸡及肉种鸡上也均有发生。肉仔鸡3-35日龄多发;蛋鸡初产多发;肉种鸡20-28周龄(初产)时多发。 展开更多
关键词 肉种鸡 家禽养殖业 家禽饲料 overs 心脏扩张 氯化胆碱 慢性呼吸道疾病 动物脂肪 马立克氏病 电解质平衡
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Heart failure
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《外科研究与新技术》 1992年第4期203-204,共2页
920647 Comparative effects of commonvasodilators on experimental cardiac fai-lure. LI Zhijian (李志坚), et al. Dept Cardiol,2nd Hosp, Tianjin Med Coll. Tianjin Med J1992; 20(8): 456-458. A 9×9 latin square design... 920647 Comparative effects of commonvasodilators on experimental cardiac fai-lure. LI Zhijian (李志坚), et al. Dept Cardiol,2nd Hosp, Tianjin Med Coll. Tianjin Med J1992; 20(8): 456-458. A 9×9 latin square design was employed forcomparing the effects of (1) placebo, (2) nitr-oprusside, (3) phentolamine, (4) isosorbide dini-trate. (5) captopril, (6) 展开更多
关键词 TIANJIN 李志坚 PLACEBO NANJING Heart failure overs SIGNS ADMINISTRATION minutes 陈星
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英语文化随身带
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作者 Cathy Manson 芥子 《疯狂英语(初中天地)》 2014年第12期54-55,共2页
"英语文化随身带"是一个英国电台节目,文章短小精悍,内容包罗万象。将英语文化装进口袋里,利用闲散的时间随身翻阅,英语学习者可以在潜移默化中了解当代英语世界的生活和文化。也许你觉得吃饱已经不是问题,吃什么才是问题。... "英语文化随身带"是一个英国电台节目,文章短小精悍,内容包罗万象。将英语文化装进口袋里,利用闲散的时间随身翻阅,英语学习者可以在潜移默化中了解当代英语世界的生活和文化。也许你觉得吃饱已经不是问题,吃什么才是问题。当你在超市患上"选择困难症"的同时,世界上却有很多人连最基本的食物也买不起。为什么会有这样的差距?一起听听本期节目—— 展开更多
关键词 英语文化 电台节目 当代英语 THINK LANDFILL overs STOCK consume
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如何安全食用剩饭剩菜
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作者 Julie Mazziotta 《疯狂英语(新读写)》 2022年第5期39-39,62,共2页
Thanks to TikTok,a 2021 case study about a man who went into organ failure and needed amputations(截肢)after eating leftovers went viral online,bringing up questions about how to avoid the same outcome.
关键词 bringing overs 安全食用
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