检索结果-南通市图书馆

International Conference on Computing in High Energy and Nuclear physics 2001年第1期 57-60页

作者： D.Holmgren p.Mackenzie 等 FermiNationalAcceleratorLaboratory BataviaILUSA

Large scale QCD Monte Carlo calculations have typically been performed on either commercial supercomputers or specially built massively parallel computers such as Fermilab's *** clusters equipped with high performance networking equipment present an attractive alternative,achieving superior performance to price ratios and offering clear upgrade *** describe the construction and results to date of Fermilab's prototype production cluster,which consists of 80 dual pentium Ⅲsystems interconnected with Myrinet networking *** describe software tools and techniques we have developed for operating system installation and *** discuss software optimizations using the pentium's built-in parallel computation facilities(SSE),Finally,we present short and long term plans for the construction of larger facilities.

关键词：格子QCD 费米实验室商品聚类

A Continuous Review Inventory System with Lost Sales and Emergency Orders

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

American Journal of Operations Research 2018年第5期8卷 343-359页

作者： Michael Haughton K. p. Sapna Isotupa School of Business & Economics Wilfrid Laurier University Waterloo Ontario Canada

We analyze a continuous review lost sales inventory system with two types of orders—regular and emergency. The regular order has a stochastic lead time and is placed with the cheapest acceptable supplier. The emergency order has a deterministic lead time is placed with a local supplier who has a higher price. The emergency order is not always filled since the supplier may not have the ability to provide the order on an emergency basis at all times. This emergency order has a higher cost per item and has a known probability of being filled. The total costs for this system are compared to a system without emergency placement of orders. This paper provides managers with a tool to assess when dual sourcing is cost optimal by comparing the single sourcing and dual sourcing models.

关键词： Continuous Review Inventory Lost Sales Emergency Order

Impact of Fast-Growing Trees planting on Degraded Land from perspectives of Ecosystem Services—Case Study from Slovakia

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 2022年第11期10卷 140-150页

作者： Jarmila Makovníková Boris pálka Stanislav Kološta National Agricultural and Food Centre/Soil Science and Conservation Research Institute Bratislava Regional Station Banská Bystica Slovakia Faculty of Ecomonics Matej Bel University in Banská Bystrica Banská Bystrica Slovakia

The aim of the study was to assess the effect of natural phytoremediation, impact of growing fast-growing trees on contaminated agricultural land on ecosystem services using a Matrix evaluation system. The Matrix system is a table that links an ecosystem to its potential to provide ecosystem services. To determine the monetary price of natural capital for the provision of ecosystem services, we chose the value transfer method, based on which it is possible to assign a price (1 point = 40.7 EUR) to point values. Monitoring of the study site Kuchyňa (Mollic Fluvisol) is running since year 2010. The fast-growing willow was planted (between 2006 to 2018 year) on an area of about 43 hectares. During the monitoring of soil parameters, we observed a slight decrease in the value of the active soil reaction, a negative trend in the content of available phosphorus and a positive trend in the development of the total content risk elements in the soil. The phytoremediation ability of willow regarding risk elements was manifested by an increase in the value and price of production and regulatory ecosystem services at the monitored location. The price of natural phytoremediation of fast-growing willow on the given area was 218762.5 EUR for production services and 171509.8 EUR for regulatory services.

关键词： Ecosystem Services Soil parameters Fast Growing Trees

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

单房胸腺囊肿的纵向CT和MRI特征

国际医学放射学杂志 2022年第1期 108-108页

作者： J.B.Ackman W.Chintanapakdee D.p.Mendoza M.C.price M.Lanuti J.A.O.Shepard 李鹏飞

摘要 CT等密度和高密度的胸腺囊肿常被误认为淋巴结病或胸腺上皮性肿瘤。目的探讨胸腺囊肿在CT和MRI上的纵向改变。材料与方法回顾性分析2008年7月—2019

关键词：

青春期前和青春期人群的生理性卵巢囊肿与其他卵巢和附件病理变化的比较：超声和外科随访研究

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

国际医学放射学杂志 2019年第5期 611-611页

作者： E.K.Schallert p.I.Abbas A.R.Mehollin-Ray M.C.price J.E.Dietrich R.C.Orth 管晓军 Department of Radiology Texas Children's Hospital

摘要卵巢和附件囊肿在青春期前和青春期的超声检查中经常出现,但是关于此类囊肿转归的研究很少。目的识别有助于鉴别生理性囊肿与非生理性病因的超声影像特征。材

关键词：生理性卵巢囊肿青春期随访研究病理变化

Assessment of Food Service Quality of Chicken Republic and Mega Chicken Restaurants, Lagos, Nigeria

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Food and Nutrition Sciences 2021年第6期12卷 602-613页

作者： C. J. Akunne p. O. Adeniji Department of Tourism Studies Redeemer’s University Ede Osun State Nigeria

In this project, assessment of food service quality of two restaurants in Lagos was carried out. The study assessed quality of food served in Chicken Republic compared with Mega Chicken. Three hundred (300) copies of ... 详细信息

In this project, pan>assessment of food service quality of two restaurants in Lagos was carried out. The study assessed quality of food served in Chicken Republic compared with Mega Chicken. Three hundred (300) copies of questionnaires were administered to the customers in Chicken Republic Restaurant while two hundred (200) copies questionnaires were administered to the customer in Mega Chicken Restaurant. In order to analyze the data, simple percentage method was adopted in which the respondents responded to variables like, quality of services, quality of food, healthy food, price and value and condition of environment as factors that determine their patronage. The result of the study showed that the customers prefer Mega Chicken. It also showed that there is a relationship between the customers’ satisfaction and customer patronage in a choice of restaurant. The result of the project could be of use to the intending restaurantspan>’ operators to understand the trend and determinants of customers’ patronage. Recommendationpa

关键词： Food Quality Food Service Mega Chicken Customer Service Chicken Republic

Rapid Determination of Moisture Content in Wood Logs

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Rapid Determination of Moisture Content in Wood Logs

Fuel Cell Technology for propulsion and power Generation of Ships： Feasibility Study on Ocean Research Vessel Sagarnidhi

The 18th European Biomass Conference and Exhibition

作者： Reisinger K. Hartmann H. Turowski p.

For rapid determination of the moisture content in wood logs numerous measuring devices are available on the market;their price ranges from 10 to 800 Euros. Comparative measurements with 12 wood log samples in a usual moisture range show that only few measuring devices can provide satisfying results concerning accuracy and repeatability when compared to moisture results from using a drying cabinet. Moisture content readings higher than 30 %（i.e. 43 % "wood humidity" based on dry matter） should in most cases be interpreted carefully. The true moisture content is almost consistently underestimated by the rapid test devices. The three devices with the highest accuracies showed a mean relative deviation of-2.9 to 5.9 %, but the deviation was usually higher than 10 %, particularly for the devices applying the dielectrical principle. Among the devices using the electrical conductivity method the instruments with ram electrode were superior. The correct use of the terms "moisture content"（wet basis） and the term "wood humidity"（dry basis） as common in the timber industry is sometimes questionable in the accompanying technical documents.

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Journal of Shipping and Ocean Engineering 2015年第5期5卷 219-228页

作者： Rajasekhar D Deepak Sankar p. S Ananthakrishna Narendrakumar D. Vessel Management Cell National Institute of Ocean Technology Chennai India

Rising fuel prices, increasing emission levels and impending environmental regulations made shipping industry to find an alternate for internal combustion engine in 21st century. Fuel cell is a sustainable, emerging technology with negligible pollution. More significantly for a research ship, emission levels need to be substantially low to have quality measurements. A feasibility study is carried-out First time in the world, to drive an ice class multi-disciplinary ORV （Oceanography Research Vessel） Sagarnidbi, using hydrogen powered fuel cell. Sagamidhi is equipped with special equipments viz., Deep Sea winch, specially designed cranes for Launching and retrieval of ROV （Remotely Operable Vehicle）, DSMC （Deep Sea Mining Crawler）, Tsunami systems, manned/unmanned submersible and ACS （Autonomous Coring System） and other facilities that support research in Indian, International and Antarctic waters. Beside this, the propulsion system along with Dp （Dynamic positioning）, centralized air conditioning and special equipments require enormous electrical power. The combustion of diesel oil in an engine, that coupled with an alternator generates electrical power required, along with NOx （Nitrous Oxides）, SOx （Sulphur Oxides） and pM （particulate Matter） emissions. Shipping industry is the fourth largest contributor to air pollution and carbon emissions, particularly in coastal areas, and the growth rate makes the problem even more critical. Stringent international air pollution regulation and increasing fuel price paves the way for an alternative ＂green emission technology＂. Various fuel cells were analyzed with different combination of fuel, electrolyte and electrodes. From the analysis, it has been found that SOFC （Solid Oxide Fuel Cell） is most suitable for the present scenario. A fuel cell designed with hydrogen as fuel, zirconium oxides stabilized with yttrium oxide as electrolyte and zirconium electrodes is used for 1.5 MW power output and 0.5 MW through regenerator. Vo

关键词： Hydrogen air pollution SOx fuel cell regenerator particulate matter.

Balanced nitrogen economy as a flexible strategy on yield stabilizing and quality of aquatic food crops in wetland ecosystem

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China(Life Sciences) 2005年第Z2期48卷 980-987页

作者： A.M.puste p.K.Sarkar D.K.Das Department of Agronomy Faculty of Agriculture Bidhan Chandra Krishi Viswavidyalaya (Agricultural University) Mohanpur-741 252NadiaWest BengalIndia Department of Agricultural Chemistry and Soil Science Faculty of Agriculture Bidhan Chandra Krishi Viswavidyalaya (Agricultural University) Mohanpur-741 252NadiaWest BengalIndia

In wetland ecosystem, nitrogen along with other elements and its management is most imperative for the production of so many aquatic food, non-food and beneficial medicinal plants and for the improvement of soil and water characteristics. With great significant importance of INM (integrated nutrient management) as sources, emphasizing on management on nitrogen as a key element and its divergence, a case study was undertaken on such aquatic food crops (starch and protein-rich, most popular and remunerative) in the farmers' field of low-lying 'Tal' situation of New Alluvial Zone of Indian subtropics. The study was designed in factorial randomized block design, where, three important aquatic food crops (water chestnut (Trapa bispinosa Roxb.), makhana (Euryale ferox Salisb.) and water lily (Nymphaea spp.) as major factor and eleven combinations of organic and inorganic sources of nutrients as sub-factor was considered in the experiment. It revealed from the results that the production of fresh kernels or nuts of water chestnut (8.571 ha-1), matured nut yield of makhana (3.06 t ha-1) and flower stalks of water-lily as vegetables (6.38 t ha-1) including its nutritional quality (starch, protein, sugar and minerals) was remarkably influenced with the application of both organic (neem oilcake @ 0.2 t ha-1) and inorganic sources (NpK @ 30:20:20 kg ha-1 along with spraying of NpK @ 0.5% each over crop canopy at 20 days interval after transplanting) than the other INM combinations applied to the crops. Among the crops, highest WCYE (water chestnut yield equivalence) exhibited in makhana due to its high price of popped-form in the country, which is being exported to other countries at now. Sole application of both (organic and inorganic sources) with lower range did not produce any significant outcome from the study and exhibited lower value for all the crops. Besides production of food crops, INM also greatly influenced the soil and water characterization and it was favourably

关键词： aquatic food crops INM nitrogen soil & water characterization economics wetland ecosystem.