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马钢磅房异地回空称重管理系统改造
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作者 夏蔚 《安徽冶金科技职业学院学报》 2013年第2期29-32,共4页
简要介绍了针对马钢原磅房异地回空称重管理系统软件的不足,采用客户端/服务器构架开发新的火车磅异地回空称重管理系统,并对新软件的程序设计和功能,以及目前在马钢物质计量中的使用情况做了描述。
关键词 异地回空称重管理系统 计量 网络
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HJ3D型双卷筒绞盘机回空卷筒不宜反向负载工作
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作者 陈铎 《吉林林业科技》 北大核心 1994年第4期53-53,共1页
HJ3D型双卷筒绞盘机回空卷筒不宜反向负载工作陈铎(吉林省上营森林经营局)HJ3D型双卷筒绞盘机是当前我国林业木材生产用在装卸归最为普遍的起重设备。它的体积小,使用灵活,设计紧凑合理,牵引力较大,零部件通用易购,很受... HJ3D型双卷筒绞盘机回空卷筒不宜反向负载工作陈铎(吉林省上营森林经营局)HJ3D型双卷筒绞盘机是当前我国林业木材生产用在装卸归最为普遍的起重设备。它的体积小,使用灵活,设计紧凑合理,牵引力较大,零部件通用易购,很受林业企业欢迎。我厂现有该机型绞盘机... 展开更多
关键词 双卷筒绞盘机 回空卷筒 负载
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冷藏运输高效问题分析研究
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作者 朱群芳 《中国流通经济》 CSSCI 北大核心 2010年第12期22-25,共4页
冷藏运输对运输工具要求很高,主要包括公路冷藏运输、铁路冷藏运输、水路冷藏运输和冷藏集装箱运输等。冷藏运输发展前景广阔,但由于我国冷藏运输业务网络不发达,冷藏物流装备设施严重不足、冷藏物流标准不统一、市场信息化程度低、冷... 冷藏运输对运输工具要求很高,主要包括公路冷藏运输、铁路冷藏运输、水路冷藏运输和冷藏集装箱运输等。冷藏运输发展前景广阔,但由于我国冷藏运输业务网络不发达,冷藏物流装备设施严重不足、冷藏物流标准不统一、市场信息化程度低、冷藏管理落后、冷藏人才缺乏,冷藏运输业发展还有很长的路要走。为更好地推动我国冷藏运输业发展,提高冷藏运输效率,应引入普通货车配货方法,建立冷藏车配货网,大力扶植建立全国性及区域性大型物流公司,加强冷藏运营信息化管理,加快运输标准的统一,提高冷藏运输管理水平,积极培养各类与冷藏运输相关的管理人才。 展开更多
关键词 冷藏运输 运输高效 运输回空效率
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关于神华铁路车流组织工作规律的探讨
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作者 唐宁 杨建兵 《许昌学院学报》 CAS 2011年第5期37-40,共4页
简述了神华铁路车流的特性以及车流组织涉及的重要指标和相互关系,对神华铁路车流组织的工作规律进行了探索和总结,最后阐述了对实际生产的应用.
关键词 神华铁路 车流组织工作 装车 回空
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Analysis and Modeling of the Central Air-Conditioning System in Intelligent Buildings 被引量:6
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作者 郭巧 徐庆伟 《Journal of Beijing Institute of Technology》 EI CAS 2002年第3期295-297,共3页
The central air conditioning system in an intelligent building (IB) was analyzed and modeled in order to perform the optimization scheduling strategy of the central air conditioning system. A set of models proposed ... The central air conditioning system in an intelligent building (IB) was analyzed and modeled in order to perform the optimization scheduling strategy of the central air conditioning system. A set of models proposed and a type of periodically autoregressive model (PAR) based on the improved genetic algorithms (IGA) were used to perform the optimum energy saving scheduling. The example of the Liangmahe Plaza was taken to show the effectiveness of the methods. 展开更多
关键词 intelligent building analysis and modeling central air conditioning energy saving
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提高专用铁路的运营效益初探
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作者 赵岩松 《煤炭经济研究》 北大核心 2002年第4期73-74,共2页
关键词 徐沛铁路 货车停时 车辆周转 货车回空 煤炭运输 专用铁路 运营效益
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发展一吨集装化与五吨集装箱运输问题
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作者 李成邦 《铁道运输与经济》 1980年第3期131-134,共4页
一、问题的提出集装箱运输是一种先进的运输方式,近些年来,世界各国发展得很快。在我国,为了实现“四化”,大力发展集装箱运输,实现成件包装货物的装卸机械化已成为当务之急。在发展集装箱运输的过程中,一方面要借鉴外国的好经验。
关键词 集装箱运输 集装化运输 成件包装货物 运输方式 装卸机械化 装卸作业 零担货物运输 沈阳铁路局 托盘运输 回空运输
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止回阀噪声的消除
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作者 李树发 《压缩机技术》 1990年第5期26-26,共1页
我厂空压站,有2台3L—10/8型空压机,在长期运行中,由于受气流的冲击作用及磨损,止回阀密封不好。因此,我们更换了2个升降式止回阀,这种止回阀具有密封性能好、阀芯行程小、噪声低等优点。但是,安装后,在空压机运行中,噪声却很大,并不停... 我厂空压站,有2台3L—10/8型空压机,在长期运行中,由于受气流的冲击作用及磨损,止回阀密封不好。因此,我们更换了2个升降式止回阀,这种止回阀具有密封性能好、阀芯行程小、噪声低等优点。但是,安装后,在空压机运行中,噪声却很大,并不停的发出刺耳的金属敲击声,使值班人员难以忍受。 展开更多
关键词 空压机 回空 噪声 消除
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GIS-based logistic regression method for landslide susceptibility mapping in regional scale 被引量:9
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作者 ZHU Lei HUANG Jing-feng 《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 SCIE EI CAS CSCD 2006年第12期2007-2017,共11页
Landslide susceptibility map is one of the study fields portraying the spatial distribution of future slope failure sus- ceptibility. This paper deals with past methods for producing landslide susceptibility map and d... Landslide susceptibility map is one of the study fields portraying the spatial distribution of future slope failure sus- ceptibility. This paper deals with past methods for producing landslide susceptibility map and divides these methods into 3 types. The logistic linear regression approach is further elaborated on by crosstabs method, which is used to analyze the relationship between the categorical or binary response variable and one or more continuous or categorical or binary explanatory variables derived from samples. It is an objective assignment of coefficients serving as weights of various factors under considerations while expert opinions make great difference in heuristic approaches. Different from deterministic approach, it is very applicable to regional scale. In this study, double logistic regression is applied in the study area. The entire study area is first analyzed. The logistic regression equation showed that elevation, proximity to road, river and residential area are main factors triggering land- slide occurrence in this area. The prediction accuracy of the first landslide susceptibility map was showed to be 80%. Along the road and residential area, almost all areas are in high landslide susceptibility zone. Some non-landslide areas are incorrectly divided into high and medium landslide susceptibility zone. In order to improve the status, a second logistic regression was done in high landslide susceptibility zone using landslide cells and non-landslide sample cells in this area. In the second logistic regression analysis, only engineering and geological conditions are important in these areas and are entered in the new logistic regression equation indicating that only areas with unstable engineering and geological conditions are prone to landslide during large scale engineering activity. Taking these two logistic regression results into account yields a new landslide susceptibility map. Double logistic regression analysis improved the non-landslide prediction accuracy. During calculation of parameters for logistic regres- sion, landslide density is used to transform nominal variable to numeric variable and this avoids the creation of an excessively high number of dummy variables. 展开更多
关键词 LANDSLIDE SUSCEPTIBILITY Logistic regression GIS Spatial analysis
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Quantum Well Intermixing of InGaAsP QWs by Impurity Free Vacancy Diffusion Using SiO_2 Encapsulation
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作者 张靖 陆羽 王圩 《Journal of Semiconductors》 EI CAS CSCD 北大核心 2003年第8期785-788,共4页
Experiment on quantum well intermixing (QWI) of InGaAsP QWs by impurity free vacancy diffusion (IFVD) using SiO 2 encapsulation is reported.A maximum band gap wavelength blue shift as large as 200nm is realized.Furt... Experiment on quantum well intermixing (QWI) of InGaAsP QWs by impurity free vacancy diffusion (IFVD) using SiO 2 encapsulation is reported.A maximum band gap wavelength blue shift as large as 200nm is realized.Furthermore,an FP laser blue shifted 21nm by QWI is fabricated with characteristics comparable with the as grown one. 展开更多
关键词 photonic integrated circuit quantum well intermixing IFVD wavelength blue shift
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Perforated midgut diverticulitis:Revisited 被引量:1
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作者 Milan Spasojevic Jens Marius Naesgaard Dejan Ignjatovic 《World Journal of Gastroenterology》 SCIE CAS CSCD 2012年第34期4714-4720,共7页
AIM:To study and provide data on the evolution of medical procedures and outcomes of patients suffering from perforated midgut diverticulitis. METHODS:Three data sources were used:the Medline and Google search engines... AIM:To study and provide data on the evolution of medical procedures and outcomes of patients suffering from perforated midgut diverticulitis. METHODS:Three data sources were used:the Medline and Google search engines were searched for case reports on one or more patients treated for perforated midgut diverticulitis (Meckel's diverticulitis excluded) that were published after 1995. The inclusion criterion was sufficient individual patient data in the article. Both indexed and non-indexed journals were used. Patients treated for perforated midgut diverticulitis at Vestfold Hospital were included in this group. Data on symptoms, laboratory and radiology results, treatment modalities, surgical access, procedures, complications and outcomes were collected. The Norwegian patient registry was searched to find patients operated upon for midgut diverticulitis from 1999 to 2007. The data collected were age, sex, mode of access, surgical procedure performed and number of patients per year. Historical controls were retrieved from an article published in 1995 containing pertinent individual patient data. Statistical analysis was done with SPSS software.RESULTS:GroupⅠ:106 patients (48 men) were found. Mean age was 72.2 ± 13.1 years (mean ± SD). Age or sex had no impact on outcomes (P = 0.057 and P = 0.771, respectively). Preoperative assessment was plain radiography in 53.3% or computed tomography (CT) in 76.1%. Correct diagnosis was made in 77.1% with CT, 5.6% without (P = 0.001). Duration of symptoms before hospitalization was 3.6 d (range:1-35 d), but longer duration was not associated with poor outcome (P = 0.748). Eighty-six point eight percent of patients underwent surgery, 92.4% of these through open access where 90.1% had bowel resection. Complications occurred in 19.2% of patients and 16.3% underwent reoperation. Distance from perforation to Treitz ligament was 41.7 ± 28.1 cm. At surgery, no peritonitis was found in 29.7% of patients, local peritonitis in 47.5%, and diffuse peritonitis in 22.8%. Peritonitis grade correlated with the reoperation rate (r = 0.43). Conservatively treated patients had similar hospital length of stay as operated patients (10.6 ± 8.3 d vs 10.7 ± 7.9 d, respectively). Age correlated with hospital stay (r = 0.46). No difference in outcomes for operated or nonoperated patients was found (P = 0.814). Group Ⅱ:113 patients (57 men). Mean age 67.6 ± 16.4 years (range: 21-96 years). Mean age for men was 61.3 ± 16.2 years, and 74.7 ± 12.5 years for women (P = 0.001). Number of procedures per year was 11.2 ± 0.9, and bowel resection was performed in 82.3% of patients. Group Ⅲ: 47 patients (21 men). Patient age was 65.4 ± 14.4 years. Mean age for men was 61.5 ± 17.3 years and 65.3 ± 14.4 years for women. Duration of symptoms before hospitalization was 6.9 d (range: 1-180 d). No patients had a preoperative diagnosis, 97.9% of patients underwent surgery, and 78.3% had multiple diverticula. Bowel resection was performed in 67.4% of patients, and suture closure in 32.6%. Mortality was 23.4%. There was no difference in length of history or its impact on survival between Groups Ⅰ and Ⅲ (P = 0.241 and P = 0.198, respectively). Resection was more often performed in Group Ⅰ (P = 0.01). Mortality was higher in Group Ⅲ (P = 0.002). CONCLUSION: In cases with contained perforation, conservative treatment gives satisfactory results, laparosco-py with lavage and drainage can be attempted and continued with a conservative course. 展开更多
关键词 Intestinal Small bowel JEJUNUM ILEUM PERFORATION DIVERTICULITIS Conservative treatment
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Use of anti tumor necrosis factor-alpha monoclonal antibody for ulcerative jejunoileitis 被引量:2
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作者 Gulseren Seven Adel Assaad +1 位作者 Thomas Biehl Richard A Kozarek 《World Journal of Gastroenterology》 SCIE CAS CSCD 2012年第36期5135-5137,共3页
Ulcerative jejunoileitis is an uncommon clinical syndrome consisting of abdominal pain,weight loss associated with diarrhea,and multiple inflammatory ulcerations and strictures of the small bowel.Ulcerative jejunoilei... Ulcerative jejunoileitis is an uncommon clinical syndrome consisting of abdominal pain,weight loss associated with diarrhea,and multiple inflammatory ulcerations and strictures of the small bowel.Ulcerative jejunoileitis can complicate established celiac disease or develop in patients de novo.Increased levels of tumor necrosis factor-alpha(TNF-α) in the small intestine of patients with untreated celiac disease are associated with a role in the immune pathogenesis of this disorder.No specific therapy has been shown to change the course of ulcerative jejunoileitis.We report a case of severe ulcerative jejunoileitis previously unresponsive to traditional therapies,including high dose corticosteroids and cyclosporine.The patient had a dramatic resolution of symptoms and a complete normalization of endoscopic findings after anti-TNF-α monoclonal antibody,infliximab(Remicade). 展开更多
关键词 Ulcerative jejunoileitis Biologic therapy Tumor necrosis factor-alpha INFLIXIMAB
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Multi-scale prediction of MEMS gyroscope random drift based on EMD-SVR 被引量:1
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作者 HE Jia-ning ZHONG Ying LI Xing-fei 《Journal of Measurement Science and Instrumentation》 CAS CSCD 2020年第3期290-296,共7页
To improve the prediction accuracy of micro-electromechanical systems(MEMS)gyroscope random drift series,a multi-scale prediction model based on empirical mode decomposition(EMD)and support vector regression(SVR)is pr... To improve the prediction accuracy of micro-electromechanical systems(MEMS)gyroscope random drift series,a multi-scale prediction model based on empirical mode decomposition(EMD)and support vector regression(SVR)is proposed.Firstly,EMD is employed to decompose the raw drift series into a finite number of intrinsic mode functions(IMFs)with the frequency descending successively.Secondly,according to the time-frequency characteristic of each IMF,the corresponding SVR prediction model is established based on phase space reconstruction.Finally,the prediction results are obtained by adding up the prediction results of all IMFs with equal weight.The experimental results demonstrate the validity of the proposed model in random drift prediction of MEMS gyroscope.Compared with a single SVR model,the proposed model has higher prediction precision,which can provide the basis for drift error compensation of MEMS gyroscope. 展开更多
关键词 random drift MEMS gyroscope empirical mode decomposition(EMD) support vector regression(SVR) phase space reconstruction multi-scale prediction
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Enrichment of carbon recovery of high ash coal fines using air fluidized vibratory deck separator 被引量:3
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作者 Laxmikanta Sahu Shobhana Dey 《International Journal of Coal Science & Technology》 EI 2017年第3期262-273,共12页
Coal is primarily beneficiated by wet gravity methods. The wet processing of coal is an efficient practice. However, it introduces the moisture in the range of 6%-15%, depending upon the size of coal which is as detri... Coal is primarily beneficiated by wet gravity methods. The wet processing of coal is an efficient practice. However, it introduces the moisture in the range of 6%-15%, depending upon the size of coal which is as detrimental as ash content to the heating value of coal. Dry beneficiation of coal fines was carried out using an air fluidized vibrating table in which the coal particles get separated from the heavier mineral particles as a result of horizontal and vertical stratification. Two level factorial design matrix was used to optimize and assess the interactive effects of the operational parameters of a pneumatic table viz. deck eccentric, side tilt and air flow rate on the clean coal yield and its ash content. Double stage processing was found to be more effective for reducing the ash content of the clean coal. Initial stage of processing at a higher ash level generates a reject of high ash with low combustibles. Cleaning of the rougher concentrate at 34%-35% ash level shows significant improvement in the organic efficiency (88.6%) and useful heat value of clean coal (15690 kJ/kg). The performance of air fluidized vibrating deck was measured by Ep value which is 0.18. 展开更多
关键词 Air flow rate · Deck eccentric · Segregation of particles ·Separation efficiency
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Kinetics of Atmospheric Corrosion of Mild Steel in Marine and Rural Environments 被引量:4
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作者 S. Palraj M. Selvaraj K. Maruthan M. Natesan 《Journal of Marine Science and Application》 CSCD 2015年第1期105-112,共8页
In continuation of the extensive studies carried out to update the corrosion map of India, in this study, the degradation of mild steel by air pollutants was studied at 16 different locations from Nagore to Ammanichat... In continuation of the extensive studies carried out to update the corrosion map of India, in this study, the degradation of mild steel by air pollutants was studied at 16 different locations from Nagore to Ammanichatram along the east coast of Tamilnadu, India over a period of two years. The weight loss study showed that the mild steel corrosion was more at Nagapattinam site, when compared to Ammanichatram and Maravakadu sites. A linear regression analysis of the experimental data was attempted to predict the mechanism of the corrosion. The composition of the corrosion products formed on the mild steel surfaces was identified by XRD technique. The corrosion rate values obtained are discussed in the light of the weathering parameters, atmospheric pollutants such as salt content & SO2 levels in the atmosphere, corrosion products formed on the mild steel surfaces. 展开更多
关键词 KINETICS atmospheric corrosion mild steel XRD weight loss
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Spatial Variability of Soil Carbon to Nitrogen Ratio and Its Driving Factors in Ili River Valley,Xinjiang,Northwest China 被引量:4
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作者 SUN Guojun LI Weihong +1 位作者 ZHU Chenggang CHEN Yaning 《Chinese Geographical Science》 SCIE CSCD 2017年第4期529-538,共10页
Soil carbon to nitrogen(C/N) ratio is one of the most important variables reflecting soil quality and ecological function,and an indicator for assessing carbon and nitrogen nutrition balance of soils.Its variation ref... Soil carbon to nitrogen(C/N) ratio is one of the most important variables reflecting soil quality and ecological function,and an indicator for assessing carbon and nitrogen nutrition balance of soils.Its variation reflects the carbon and nitrogen cycling of soils.In order to explore the spatial variability of soil C/N ratio and its controlling factors of the Ili River valley in Xinjiang Uygur Autonomous Region,Northwest China,the traditional statistical methods,including correlation analysis,geostatistic alanalys and multiple regression analysis were used.The statistical results showed that the soil C/N ratio varied from 7.00 to 23.11,with a mean value of 10.92,and the coefficient of variation was 31.3%.Correlation analysis showed that longitude,altitude,precipitation,soil water,organic carbon,and total nitrogen were positively correlated with the soil C/N ratio(P < 0.01),whereas negative correlations were found between the soil C/N ratio and latitude,temperature,soil bulk density and soil p H.Ordinary Cokriging interpolation showed that r and ME were 0.73 and 0.57,respectively,indicating that the prediction accuracy was high.The spatial autocorrelation of the soil C/N ratio was 6.4 km,and the nugget effect of the soil C/N ratio was 10% with a patchy distribution,in which the area with high value(12.00–20.41) accounted for 22.6% of the total area.Land uses changed the soil C/N ratio with the order of cultivated land > grass land > forest land > garden.Multiple regression analysis showed that geographical and climatic factors,and soil physical and chemical properties could independently explain 26.8%and 55.4% of the spatial features of soil C/N ratio,while human activities could independently explain 5.4% of the spatial features only.The spatial distribution of soil C/N ratio in the study has important reference value for managing soil carbon and nitrogen,and for improving ecological function to similar regions. 展开更多
关键词 soil C/N ratio spatial variability geostatistical analysis Cokriging interpolation multiple regression analysis Ili River valley
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Identification of Major Sources of PM2.5 in St. Louis Missouri USA
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作者 WANG Guanlan HOPKE Philipt FU Gang 《Journal of Ocean University of China》 SCIE CAS 2009年第2期101-110,共10页
The objective of this study is to examine the use of the conditional probability function(CPF) and nonparametric regression(NPR) to identify the relationship between wind direction and concentration of PM2.5(particula... The objective of this study is to examine the use of the conditional probability function(CPF) and nonparametric regression(NPR) to identify the relationship between wind direction and concentration of PM2.5(particulate matter with aerodynamic diameter less than or equal to 2.5 μm). Twenty four-hour integrated PM2.5 mass and species concentrations were measured at the St. Louis-Midwest Supersite in East St. Louis,Illinois,USA in the periods of 22-28 June 2001,7-13 November 2001,and 19-25 March 2002. Wind directions were measured on site. The concentrations of 15 elements and ions,i.e. Al,As,Cd,Cr,Cu,Fe,Mn,Ni,Pb,Se,Zn,OC,EC,SO4,and NO3 were calculated using the CPF and NPR. The comparison between the results obtained from the CPF and NPR demonstrated that they both agreed well with the locations of the known local point sources. The CPF was simpler and easier to calculate than NPR. In contrast,NPR provided PM2.5 concentrations but with some uncertainties. This study indicates that both methods can be utilized to promote the source apportionment study of ambient PM2.5. 展开更多
关键词 conditional probability function nonparametric regression wind direction PM2.5 concentration.
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Comparison of Artificial Neural Networks,Geographically Weighted Regression and Cokriging Methods for Predicting the Spatial Distribution of Soil Macronutrients(N,P,and K) 被引量:7
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作者 Samad EMAMGHOLIZADEH Shahin SHAHSAVANI Mohamad Amin ESLAMI 《Chinese Geographical Science》 SCIE CSCD 2017年第5期747-759,共13页
Soil macronutrients(i.e. nitrogen(N), phosphorus(P), and potassium(K)) are important soils components and knowing the spatial distribution of these parameters are necessary at precision agriculture. The purpose of thi... Soil macronutrients(i.e. nitrogen(N), phosphorus(P), and potassium(K)) are important soils components and knowing the spatial distribution of these parameters are necessary at precision agriculture. The purpose of this study was to evaluate the feasibility of different methods such as artificial neural networks(ANN) and two geostatistical methods(geographically weighted regression(GWR) and cokriging(CK)) to estimate N, P and K contents. For this purpose, soil samples were taken from topsoil(0–30 cm) at 106 points and analyzed for their chemical and physical parameters. These data were divided into calibration(n = 84) and validation(n = 22). Chemical and physical variables including clay, p H and organic carbon(OC) were used as auxiliary soil variables to estimate the N, P and K contents. Results showed that the ANN model(with coefficient of determination R^2 = 0.922 and root mean square error RMSE = 0.0079%) was more accurate compared to the CK model(with R^2 = 0.612 and RMSE = 0.0094%), and the GWR model(with R^2 = 0.872 and RMSE = 0.0089%) to estimate the N variable. The ANN model estimated the P with the RMSE of 3.630 ppm, which was respectively 28.93% and 20.00% less than the RMSE of 4.680 ppm and 4.357 ppm from the CK and GWR models. The estimated K by CK, GWR and ANN models have the RMSE of 76.794 ppm, 75.790 ppm and 52.484 ppm. Results indicated that the performance of the CK model for estimation of macro nutrients(N, P and K) was slightly lower than the GWR model. Also, the accuracy of the ANN model was higher than CK and GWR models, which proved to be more effective and reliable methods for estimating macro nutrients. 展开更多
关键词 precision agriculture soil characteristics INTERPOLATION artificial neural networks geographically weighted regression COKRIGING
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Design and application of solid, dense backfill advanced mining technology with two pre-driving entries 被引量:10
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作者 Zhang Qiang Zhang Jixiong +2 位作者 Guo Shuai Gao Rui Li Weikang 《International Journal of Mining Science and Technology》 SCIE EI CSCD 2015年第1期127-132,共6页
New solid backfill mining technology provides unique technical advantages for ‘‘three-under'' coal mining which refers to coal resources trapped under buildings, railways, and water bodies. This technology h... New solid backfill mining technology provides unique technical advantages for ‘‘three-under'' coal mining which refers to coal resources trapped under buildings, railways, and water bodies. This technology has a much higher recovery rate and can effectively control the surface subsidence. However, successful application of this technology depends heavily on geological conditions. To avoid the disadvantages associated with downward mining and overhead backfilling with this new technology, a new advanced solid backfill mining design with two pre-driving entries is proposed here to ensure the backfill effect. Taking Huayuan coal mine as an example, this paper tests the double gob-side entries retaining with no pillar left scheme and optimizes an integrated technology setup for backfill mining and gob-side entry retaining. Field applications show that the recovery rate increased from 40% for strip mining to 85% for backfill mining. Moreover, the new backfill technology allowed for better control over the surrounding rock deformation caused by the gob-side entry retaining effect and better control of ground subsidence as compared to strip mining. 展开更多
关键词 Two pre-driving entriesGob-side entry retainingSolid backfill miningStrip miningGround subsidence contro
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Prediction of Soil Depth from Digital Terrain Data by Integrating Statistical and Visual Approaches 被引量:8
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作者 F. M. ZIADAT 《Pedosphere》 SCIE CAS CSCD 2010年第3期361-367,共7页
Information about the spatial distribution of soil attributes is indispensable for many land resource management applications; however, the ability of soil maps to supply such information for modern modeling tools is ... Information about the spatial distribution of soil attributes is indispensable for many land resource management applications; however, the ability of soil maps to supply such information for modern modeling tools is questionable. The objectives of this study were to investigate the possibility of predicting soil depth using some terrain attributes derived from digital elevation models (DEMs) with geographic information systems (GIS) and to suggest an approach to predict other soil attributes. Soil depth was determined at 652 field observations over the A1-Muwaqqar Watershed (70 km2) in Jordan. Terrain attributes derived from 30-m resolution DEMs were utilized to predict soil depth. The results indicated that the use of multiple linear regression models within small watershed subdivisions enabled the prediction of soil depth with a difference of 50 cm for 77% of the field observations. The spatial distribution of the predicted soil depth was visually coincided and had good correlations with the spatial distribution of the classes amalgamating three terrain attributes, slope steepness, slope shape, and compound topographic index. These suggested that the modeling of soil-landscape relationships within small watershed subdivisions using the three terrain attributes was a promising approach to predict other soil attributes. 展开更多
关键词 compound topographic index digital elevation model GIS WATERSHED
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