韩国松萎蔫病的研究及防控现状

自从松萎蔫病于1988年首次报道以来,该病已经扩散到韩国大部分地区并引起未能预见的危害。从2000年该病危害急剧增加,到2006年危害面积已达7 871 hm2。2000—2008年伐除的病树已达1 851 225株,年经济损失达1 000万美元。2006年后危害面积下降,2008年下降到6 015 hm2。但至2008年该病已经扩散至韩国54个地区、县和11省。调查发现松材线虫可以被云杉花墨天牛(Monochamus saltuarius)所携带。防治的策略为：(1)连续地监测;(2)病株的早期检测;(3)伐除病株;(4)焚烧和熏蒸伐除的病木。对人文和旅游景点及成熟林可以采取注射法防治,也可采取飞防的方法防治天牛。韩国已经通过了法律,禁止病木的运输。在首次发现该病后连续3 a未发生重复感染的地区,建立无病区和优选系统。     

КОММУТАТИВНЫЕ ПОДАЛГЕБРЫ НАИВЫСШЕЙ РАЗМЕРНОСТИ АЛГЕБР Ли. Вn,Cn и Dn

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Unification and Comparison between Two Concepts of Radar Target Angular Glint

This paper provides a general proof of unification between two concepts of radar target angular glint. The analysis of a two-point target model, consisting of a electrically and a magnetically ideal dipole, shows the relation, difference and equivalent condition between them more clearly. Angular glint has been synthesized from the measured data of radar echo phase, and compared with the theoretical result.     

A HEURISTIC FOR F3/bi= b/C_(max) AND ITSWORST-CASE ANALYSIS

1.IntroductionTheF3Cm..canbestatedasfOllows.Eachofthenjobs1,2,'')nistobeprocessedonthreemachinesA,B,Cinthesameorder.Giventheprocessingtimesal?hiandciofjobionmachinesA,BandC,findtheorderinwhicheachmachineshouldprocessethejobssoastominimizingthetotaltimesp…     

USING DISPLACED CONE REPRESENTATION IN DEA MODELS FOR NONDOMINATED SOLUTIONSIN MULTIOBJECTIVE PROGRAMMING

1.IlltroductionBowlin,etal.[2]extendedtheearlierworkofBowlinetal.11]aspartofaresponsetowhatseemstobeagrowinginterestintheuseofefficiencydominance--asreflected,forexampleintheworkofLoved[7],TulkensandVandenEeckaut[lo]andtheirassociates.ThefocusinBowlinetal.[2]turnedtotheuseofan11metricasabasisfor(1)measuringtheamountofefficiencydominancethatmightbepresentinanyDecisionMakingUnit(DMU)aswellasfor(2)dealingwithproblemsinvolvedinthepossiblepresenceofslackswithnon-zerovalues,--whichareimportantas…     

蒽醌吡酮衍生物的研究 Ⅱ、乙酰基蒽醌吡酮衍生物的脱酰化反应

某些蒽醌吡酮（ ）衍生物在染料工业中作为分散染料及酸性染料,应用于 合成纤维及动物纤维的染色。我们研究了利用二乙烯酮合成蒽醌吡酮衍生物的方法,在进行 ４－澳基３’－乙酰基Ｎ－甲基蒽醌吡酮的芳胺化反应时,发现了在芳胺化的同时,吡酮环上乙酰 基发生脱裂的反应。并证实了脱酰基反应是在高温下和酸性物质存在下发生的;芳胺化过程 中放出的澳化氢为引起脱酰化反应的原因。将乙酰基蒽醌吡酮衍生物与稀盐酸一起放在密封 玻璃管内加热,即能发生脱酰化反应。     

Decision Making as Theorem Proving

We present a method for using type theory to solve decision making problem. Our method is based on the view that decision making is a special kind of theorem proving activity. An isomorphism between problems and types, and solutions and programs has been established to support this view which is much similar to the Curry-Howard isomorphism between propositions and types, and proofs and programs. To support our method, a proof development system called PowerEpsilon has been developed, and the synthesis of a decision procedure for validity of first-order prepositional logic is discussed to show the power of the system.     

Integrative Stability Analysis for A Class of Intelligent Control Systems

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The Complex System Modeling Method Based on Uniform Design and Neural Network

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Early Paleozoic granite in Nujiang River of northwest Yunnan in southwestern China and its tectonic implications

The Nujiang region along the China-Burma border in the western Yunnan has received a great deal of attention and has been considered to be the important channel of southeastward escape of the Tibetan Plateau[1-4]. This channel is bordered by the Red River-Ailao Mountain left-literal strick-slip fault in the east and Gaoligong- Sagaing right-literal strick-slip fault in the west[5-7]. Within this channel, it is still not clear to which tectonic