SINGLE MACHINE SCHEDULING WITH CONTROLLABLE PROCESSING TIMES AND COMPRESSION COSTS （PART I：EQUAL TIMES AND COSTS）

Most papers in scheduling research have treated individual job processing times as fixed parameters. However, in many practical situations, a manager may control processing time by realloeating resources. In this paper, authors consider a machine scheduling problemwith controllable processing times. In the first part of this paper, a special case where the pro-cessing times and compression costs are uniform among jobs is discussed. Theoretical results are derived that aid in developing an O（n^2) algorithm to slove the problem optimally. In the second part of this paper, authors generalize the discussion to general case, An effective heuristic to the genera/ problem will be presented.     

多电子束契伦柯夫自由电子激光振荡器

我们对多电子束契伦柯夫自由电子激光进行了首次实验研究。280A,500kV的电子束被引入一多介质矩形谐振腔,在频率为33.4GHz处产生了1.7MW的契伦柯夫相干受激辐射。互作用效率为1.2％。     

电磁加载下的高能量密度物理问题研究

1物质的高能量密度状态文中所述的高能量密度状态是指物质由于受到外界能量输入或自身能量转换,使其内能增大而造成的高压力、高密度和高温度状态。能量的体积密度的量纲等同于压力的量纲,由此可知内能增加量为1MJ/cm3时,物质内部的压力约为1TPa量级。通常认为在高能量密度状态下,固体物质的可压缩性应有显著影响,气态物质应达到接近极限压缩的程度,相当于0.1TPa或0.1MJ/cm3的内能密度。密度为0.01g/cm3的物质被加热到100eV,其压力则为0.1TPa,对氢气而言比能量约10MJ/g。高能炸药PBX-9404的化学反应能密度约为0.0096MJ/cm3,爆压为36…     

多量子核磁共振的直接观测

本文用异核弱耦合体系AX_n(n=1,2,3)证明,多量子相干性(MQC)在弱连续波(CW)辐射场的微扰下可以实时地显示各阶多量子(MQ)跃迁.文中讨论了CW频率偏置及辐射场强对所观测的MQ跃迁的影响,指出这种单次扫描的MQNMR方法灵敏度高,谱易于辨认,只需要一维Fourier变换,因此具有应用前景.文中还对CW辐照产生的Raman效应作出解释.     

Momentum Transfer Dependence of Two Types of the Broad Enhancement Phenomena： CO Spectra in the Valence Energy Region

Partial generalized oscillator strength densities of CO molecules related to the excitation of a 5σ or 1π electron are calculated by using multi-scattering self-consistent-field methods.Momentum transfer dependence of two types of the broad enhancement phenomena above the threshold with one-electron character,i.e. shape resonance and non-resonance enhancement,is studied.Our calculations show that the energy position of a non-resonance enhancement is related to the momentum transfer K.Therefore,electron impact based experiments can be used to identify the two types of the broad enhancement phenomena.     

Multi-component SC Lax Integrable Hierarchy of Soliton Equations and Its Multi-component Integrable Coupling System with Two Arbitrary Functions

A new simple loop algebra ^-GM is constructed, which is devoted to establishing an isospectral problem.By making use of generalized Tu scheme, the multi-component SC hierarchy is obtained. Furthermore, an expanding loop algebra ^-FM of the loop algebra ^-GM is presented. Based on FM, the multi-component integrable coupling system of the multi-component SC hierarchy of soliton equations is worked out. How to design isospectral problem of mulitcomponent hierarchy of soliton equations is a technique and interesting topic. The method can be applied to other nonlinear evolution equations hierarchy.     

关于多目标数学规划的最优性条件

本文讨论定义于Ｂａｎａｃｈ空间的多目标数学规划，得到一些ε－最优解和（弱）有效解的必要条件，充分条件和必要充分条件。     

多光束相干控制光学跃迁的理论研究

根据量子干涉的基本原理，研究了在多束相干激光场作用下分子或凝聚态体系光学跃迁几率与光场的相位关系，推导了作为相干控制基础的多路径光学跃迁的一般模型及其特殊情形的跃迁几率的关系表达式，归纳了已有的相干控制激发方案，提出的频域的相干控制可用统一的量子理论描述，理论研究的结果表明，对多路径量子跃迁过程，在相干外场的作用下，会引起态的量子干涉，使总跃迁几率的大小随外场的相位变化而改变，这是实现与光学跃迁过     

电热蒸发进样微波等离子体炬原子发射光谱法中共存元素的影响

本文考察了以微波等离子体炬（MPT）为光源，电热钽丝环进样时，溶液中共存元素对发射信号的影响。     

也谈“心理状态数”的估计

读了董、宋两位同志的“心理状态数矩法估计”(见本期)一文,觉得该文提出了一个在实用上有意义的问题,二位用知法推导出了有关的估计,形式也比较简洁便于计算,有其一定的优点,另一方面,也感到还有些可进一步探讨的问题,因此写了这篇小文,供对此问题有兴趣的同志参考.董、宋两位同志所提出的统计模型是:有独立随机样本Y1,…,Yn,它来自参数c和б的,以为概率密度的总体,要估计c。此处0≤c≤2, б>0,他们提出了矩估计法,本文先来考察极大似然估计法,并指出其优点。 1.极大似然估计法 样本Y1,…,Yn的似然函数是其中m是Y1,…Yn中不大于0的个数,…