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EFFECT OF COLD WORKING ON THE AGING PROPERTIES OF Cu-Cr-Zr-Mg ALLOY BY ARTIFICIAL NEURAL NETWORK

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Acta Metallurgica Sinica(English Letters) 2004年第5期17卷 741-746页

作者： j.H.Su H.j.Li Q.M.Dong P.Liu B.X.Kang B.H.Tian CollegeofMaterialsScienceandEngineering NorthwesternPolytechnicalUniversityXi＇an710072China GollegeofMaterialsScienceandEngineering HenanUniversityofScienceandTechnologyLuoyang471003China

A developmental research has been carried out to deal with the high performance of Cu-Cr-Zr-Mg lead frame alloy by artificial neural network (ANN). Using the cold working to assist in the aging hardening can improve the the hardness and electrical conductivity properties of Cu-Cr-Zr-Mg lead frame alloy. This paper studies the effect of different extent of cold working on the aging properties by a supervised ANN to model the non-linear relationship between processing parameters and the properties. The back-propagation (BP) training algorithm is improved by Levenberg-Marquardt algorithm. A basic repository on the domain knowledge of cold worked aging processes is established via sufficient data mining by the network. The predicted values of the ANN coincide well with the tested data. So an important foundation has been laid for prediction and optimum controlling the rolling and aging properties of Cu-Cr-Zr-Mg alloy.

关键词： Cu-Cr-Zr-Mg alloy cold working aging artificial neural network (ANN)

响应曲面法-毛细管电泳联用测定南蛇藤中南蛇藤素的含量

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中国医院药学杂志 2014年第9期34卷 704-709页

作者：张颖崔英杰郭守东杨娜娜司艳红秦树存山东省高校动脉粥样硬化重点实验室泰山医学院动脉粥样硬化研究所山东泰安271000

目的:优化南蛇藤中南蛇藤素的提取工艺,并测定化合物在南蛇藤不同部位中的含量分布。方法:利用箱线图设计(BBD)实验,采用响应曲面法(RSM)优化南蛇藤素的提取工艺,利用毛细管电泳联用技术分析南蛇藤素在南蛇藤不同部位中的分布。结果:南... 详细信息

目的:优化南蛇藤中南蛇藤素的提取工艺,并测定化合物在南蛇藤不同部位中的含量分布。方法:利用箱线图设计(BBD)实验,采用响应曲面法(RSM)优化南蛇藤素的提取工艺,利用毛细管电泳联用技术分析南蛇藤素在南蛇藤不同部位中的分布。结果:南蛇藤素的最佳提取条件为采用80%甲醇,料液比20 ml·g-1,超声提取时间为50 min。南蛇藤素在根、茎、皮、叶中的含量分别为5.13,1.51,0.32,0.34 mg·g-1。结论:结果表明,南蛇藤因用药部位不同,其南蛇藤素含量存在显著差异,响应曲面-毛细管电泳联用技术是一种准确、快速提取并测定物质含量的简便方法。本实验为进一步开发南蛇藤的用药资源提供了理论依据。

关键词：南蛇藤超声提取毛细管电泳南蛇藤素响应曲面法

Neonatal respiratory failure-An overview

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重庆医学 2012年第21期41卷 2121-2127,2130页

作者： Gortner L Shen j Department of Paediatrics and Neonatology University Hospital of the Saarland Homburg/Saar Germany Department of Paediatrics Daping Hospital & Research Institute of Surgery ofThird Military Medical University Chongqing 400042China

Respiratory disordersin the neonates still remainthe reason for *** rea-sons for respiratory failurein the term neonate includetransient tachypnea(TTN)of the neonate;

关键词：呼吸系统疾病新生儿治疗方法临床分析

Effect of dietary near ideal amino acid profile on heat production of lactating sows exposed to thermal neutral and heat stress conditions

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journal of Animal Science and Biotechnology 2021年第2期12卷 739-754页

作者： S.Zhang j.S.johnson N.L.Trottier Department of Animal Science Michigan State UniversityEast Lansing 48824USA USDA-ARS Livestock Behavior Research Unit West Lafayette 47907USA

Background:Reduced protein diet manifested potential to mitigate heat production based on the concept of ideal amino acid *** hypothesis of this study was that lactating sows fed a low crude protein(LCP)diet with supplemental amino acid produce less heat compared to those fed a high crude protein(HCP)diet under both thermal neutral(TN)and heat stress(HS)***:Thirty-two lactating sows were allotted to HCP(193 g CP/kg)and LCP(140 g CP/kg)diets under thermal neutral(TN,21±1.5°C)or cycling heat stress(HS,32±1.5°C daytime and 24±1.5°C nighttime)*** contained 0.90%SID lysine and 10.8 Mj/kg net *** pressure indirect calorimeters were used to measure gas exchange in individual sows with litters,and individual piglets on days 4,8,14 and *** and litter weights were recorded on days 1,10 and ***:Sow total heat production(THP)was calculated by subtracting litter THP from sow+litter THP based on *** BW and body protein(BP)loss was greater for LCP diet compared to HCP diet in peak lactation(P<0.05 and P<0.01,respectively)and throughout the entire lactation period(P<0.05 and P=0.056,respectively)under HS ***-stressed sows fed HCP diet had higher(P<0.05)rectal temperature at 13:00(P<0.05)and 19:00(P<0.01),and higher respiration rate at 07:00(P<0.05),13:00(P<0.05)and 19:00(P<0.05)compared to TN sows fed HCP *** sows fed LCP diet,those under HS tended to have higher(P=0.098)rectal temperature at 13:00 and had higher(P<0.05)respiration rate at 07:00,13:00 and 19:00 compared to TN *** relationship between daily THP and days in lactation of sows fed LCP diet was quadratic(P<0.05),with an ascending trend until day 14 and a descending trend from days 14 to *** fed LCP diet had lower daily THP at day 18(P<0.001)compared to those fed the HCP diet under HS ***:Reduction in THP in sows fed LCP diet was largely associated with THP on day 18 of lactation under HS *** LCP die

关键词： Amino acid Heat stress Lactating sows Low protein diet Total heat production

Two Courts of the’Phags-pa Era

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中国藏学 1992年第S1期 278-306页

作者： LeonardW.j.vanderKuijp

1. Preamble An event which is said to have taken place in 1267, just prior to’ Phags--pa’s leisurely re-turn to the Mongol imperial court in China was his organization of an entourage of attendants andofficials who were responsible for the wide variety of duties and functions that had accrued to him inthe course of his growing prestige and influence. In keeping with his position in Tibet as the

关键词：加州

Cancer drug resistance: a new perspective

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Cancer Drug Resistance 2018年第1期1卷 1-5页

作者： Godefridus j.Peters Laboratory Medical Oncology VU University Medical CenterCancer Center AmsterdamAmsterdam 1007 MBThe Netherlands

INTRODUCTION Cancer drug resistance has been and unfortunately still is a major problem in cancer *** any therapy(except surgery)that is being used in the treatment of cancer can result in *** there is a large group of patients that will either not respond to the applied therapy(intrinsic resistance)or will become resistant during therapy(acquired resistance).Sometimes patients can become resistant to one specific drug and remain sensitive to other drugs(one-drug resistance);another group of patients may become resistant to one drug and will be resistant to other unrelated drugs as well(multiple drug resistance,MDR).

关键词： drugs Cancer drug

A discussion of‘optimal reinsurance designs based on risk measures:a review’

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Statistical Theory and Related Fields 2020年第1期4卷 14-15页

作者： Tim j.Boonen Amsterdam School of Economics University of AmsterdamAmsterdamThe Netherlands

I congratulate the authors on their review article(Cai and Chi,2020).Their paper reviews the academic literature on optimal reinsurance problems with risk *** optimal reinsurance,an insurer seeks to share the exogenou... 详细信息

关键词： academic insurance optimal

Soil Organic Carbon Pools Under Switchgrass Grown as a Bioenergy Crop Compared to Other Conventional Crops

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Pedosphere 2013年第4期23卷 409-416页

作者： F.G.DOU F.M.HONS W.R.OCUMPAUGH j.C.READ M.A.HUSSEY j.P.MUIR Texas A&M AgriLife Research &Extension Center at Beaumont Department of Soil and Crop Sciences Texas A&M University Texas A&M AgriLife Research Station at Beeville Texas A&M AgriLife Research and Extension Center at Dallas Texas A&M AgriLife Research and Extension Center at Stephenville

Switchgrass （Panicum virgaturn L.） has been proposed as a sustainable bioenergy crop because of its high yield potential, adap- tation to marginal sites, and tolerance to water and nutrient limitations. A better understanding of the potential effects of biomass energy crop production practices on soil biological properties and organic matter dynamics is critical to its production. Our objective was to evaluate changes in C pools under a warm-season perennial switchgrass in different soils compared to typically-grown crops col- lected at College Station, Dallas, and Stephenville, TX in February 2001. Sampling depths were 0-5, 5-15, and 15-30 cm. Switchgrass increased soil organic C （SOC）, soil microbial biomass C （SMBC）, mineralizable C, and particulate organic matter C （POM-C） com- pared to conventional cropping systems. Soil C concentrations were in the order： long-term coastal bermudagrass [Cynodon dactylon （L.） Pers.] 〉 switchgrass or kleingrass （Panicum coloratura L.） planted in 1992 〉 switchgrass 1997 〉 conventional cropping systems. Soil C concentrations tended to increase with increasing clay content. Greater microbial biomass C followed the order of Dallas 〉 College Station 〉 Stephenville, and ranged from approximately 180 mg C kg-1 soil at Stephenville to 1 900 mg C kg-1 soil at Dallas. Particulate organic C was more sensitive than other fractions to management, increasing as much as 6-fold under long-term coastal bermudagrass compared to conventional cropping systems. Our study indicated that conversion of conventional cropping systems into switchgrass production can sequestrate more SOC and improve soil biological properties in the southern USA.

关键词： cropping systems particulate organic C perennial grasses soil microbial biomass C soil mineralizable C

Global challenges of food safety for China

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Frontiers of Agricultural Science and Engineering 2018年第3期5卷 291-293页

作者： joseph j.jEN College of Agriculture California Polytechnic University

Ever since the Melamine event, China has faced challenges of food safety both domestically and globally. With the economic development, the Chinese consumers are demanding high quality, nutritious, and safe foods from the food industry but are not willing to pay higher prices. The Chinese food chain system of mostly small and medium enterprises presents challenges to the government to monitor and implement food safety laws and regulations. The academia and media are learning to take on their responsibilities with some success. Discussions and potential solutions of the global challenges of the five pillars for the food safety in China are presented here.

关键词： food safety challenges food industry government academia media consumer