The single-machine scheduling problems with deteriorating jobs and learning effect

INTRODUCTION Scheduling problems have been studied widely in recent years with many results. In the classical scheduling problems, the processing times of jobs are constant, although, there are many cases where the processing times of jobs are not constant but in- creasing or decreasing over time so that the process- ing times of jobs are no longer independent. For example, a facility is deteriorating because of long time use so that its processing capacity de- creases with time, and a job…     

教育类期刊如何服务于新课程改革

2001年9月，我国开始了以教材改革为核心的一次全方位的课程改革，在这次课程改革中，服务于学校教育的教育类期刊就要充分利用自己作为媒体的独特地位，认真研究课程改革的理论和有关精神，积极参与到课程改革的实践之中，科学地策划课程改革栏目，积极引导、推动课程改革。     

EUTECTOID STRUCTURES IN NICKEL-ALUMINIUM BRONZES

This paper discusses the microstructure of nickel-aluminium bronzes con-taining(9-10)wt% Al and(0.1～5)wt% Ni,in which three eutectoids may exist.Themorphologies of α+γ_2 and α+β'_2 are similar but the latter is finer.In the α+β'_2+γ_2eutectoid structure β'_2 is mainly concentrated at the α/β boundaries,while γ_2 is distrib-uted inside prior B regions.Both K-S and N-W orientation relationships exist betweenα and β'_2(or γ_2)in alloys consisting of α+β'_2 or α+γ_2.However,if the alloy consists ofα+β'_2+γ_2 eutectoid,the lattices of β'_2 and γ_2 are parallel,both of them have the N-Worientation relationship with α.     

酶工程教学方法与教育思想改革初探

本文在创新、实效、突出重点、培养高素质人才等几个方面，论述了在讲授生物工程专业的专业必修课“酶工程”时，从教材的选择、授课方法、知识的传授等方面，在教学方法、教学思想上，进行了改革尝试，通过学生期末考试的成绩来看，取得了一定的效果     

Anisotropic Open Cosmological Models of Spin Matter with Magnetic Moment

We have derived a set of field equations for a Weyssenhoff spin fluid including magnetic interacton among the spinning particles prevailling in spatially homogeneous,but anisotropically cosmological models of Bianchi type V based on Einstein-Cartan theory.We analyze the field equations in three different equations of states specified by p=1(1/3)ρand p=0,The analytical solutions found are non-singular provided that the combined energy arising from matter spin and magnetic interaction among particles overcomes the anisotropy energy in the Universe,We have also deduced that the minimum particle numers for the radiation(p=(1/3)ρ) and matter(p=0) epochs are 10^88 and 10^108 respectively.the minimum particle number for the state p=ρ is 10^96,leading to the conclusion that we must consider the existence of neutrinos and other creation of particles and anti-particles under torsion and strong gravitational field in the early Universe.     

Potential natural exposure of endangered red-crowned crane (<Emphasis Type="Italic">Grus japonensis</Emphasis>) to mycotoxins aflatoxin B<Subscript>1</Subscript>, deoxynivalenol,zearalenone, T-2 toxin,and ochratoxin A

A survey was conducted to determine whether mycotoxins were present in the foods consumed by red-crowned cranes (Grus japonensis) in the Yancheng Biosphere Reserve, China. Collected in the reserve’s core, buffer, and experimental zones during overwintering periods of 2013 to 2015, a total of 113 food samples were analyzed for aflatoxin B₁, deoxynivalenol, zearalenone, T-2 toxin, and ochratoxin A using high performance liquid chromatography (HPLC). The contamination incidences vary among different zones and the mycotoxins levels of different food samples also presented disparity. Average mycotoxin concentration from rice grain was greater than that from other food types. Among mycotoxin-positive samples, 59.3% were simultaneously contaminated with more than one toxin. This study demonstrated for the first time that red-crowned cranes were exposed to mycotoxins in the Yancheng Biosphere Reserve and suggested that artificial wetlands could not be considered good habitats for the birds in this reserve, especially rice fields.     

一次有益探索的中断──重评东欧各国1948年前“特殊道路”问题

东欧各国在世界反法西斯战争胜利后建立了人民民主政权。一些领导人从本国实际出发，对本国走向社会主义的特殊道路进行独立探索，提出了人民民主道路，具有开创意义。但在冷战开始的形势下，苏联领导人通过成立共产党情报局，开展对所谓“民族主义”的批判，强使这种有益探索中断，转而推行苏联模式，使东欧各国后来的发展付出沉重代价，留下深刻教训。     

谐波的产生与危害

分析了谐波产生的原因及其危害性,提出了有效的抑制措施.     

小型冷库隔热材料及冷桥的选择

通过采用新的设计方法对旧冷库两层结构进行改造，解决了地坪防冻、地表保温和冷桥的问题，同时也给出了建筑尺寸．