SDL语言SAVE功能的等价变换

本文提出ＣＣＩＴＴ在ＳＤＬ基本集中定义的ＳＡＶＥ概念是可导出的新观点，并通过形式化地定义适合ＳＤＬ的扩展有限状态自动机模型，导出了一个消除ＳＡＶＥ的变换算法，同时证明了该算法保持了变换前后ＥＦＳＭ的等价性。     

解0-1线性规划Surrogate对偶的一个方法

0—1线性观划不难化为以下形式: (P)minc~Tx s.t.Ax≤b,x∈X这里X={(x_1,…,x_n)~T|x_i=0,1,i=1,…,n},A是m×n矩阵,c~T=(c_1,…,c_n),c_i≤0,(i=1,…,n),b∈R~m.假定(P)是适定的,称x是决策变量,A、b、c是参数变量. 设非负乘子V∈R~m,问题     

Y_3Al_5O_(12):Er晶体中Er~(3+)的光谱研究和2.938μm激光辐射

文本报道了Y_3Al_5O_(12)晶体中Er~(3+)离子的发射光谱研究的一些结果。研究分析解释了4~I_(11/2)—4~I_(13/2)跃迁的受激辐射的机理,获得了2.938μm激光辐射。     

带内建二极管的彩电行管瞬态热阻的测量

本文以实验比较了一般功率晶体管和带内建二极管的功率晶体管的EB结的温度特性,分析了并联在EB结上的扩散电阻Rb对测量晶体管△V_(BE)E产生影响的原因.提出了带内建二极管的功率管△v_(BE)测量条件.     

THE INFLUENCE OF HEAT TREATMENT ON STRUCTURES OF THE AGGREGATED STATE OF POLYAMIDE-1010

The structural parameters of the aggregated state of polyamide (PA)-1010 annealedat various temperatures were computed by means of the desmearing intensity from SmallAngle X-ray Scattering (SAXS) measurements and by using the concept of the distance dis-tribution function. The results indicated that the structural parameters of the aggregatedstate were strongly dependent upon heat treatment conditions and the maximum valuesof the structural parameters were obtained for the samples annealed at T = 175℃. Theparticle size Z annealed at different temperature was ranged between 8.1--12.8nm, and thevalues of the distance distribution function P_(max)(Z) were obtained when Z = 4.0--6.8nm.Using one dimension electron density correlation function (1D EDCF) method long period(L) and thickness of the lamellar (d_0) were estimated and were found to increase with theincrease of the degree of crystallinity.     

THE DEGREE OF CRYSTALLINITY OF MULTICOMPONENT POLYMERS BY WAXD

Based on the X- ray scattering intensity theory, the correction factors of the degree ofcrystallinity formulae of the multicomponent polymers have been clearly defined. The formulae ofthe degree of crystallinity of the multicomponent polymers were derived in terms of WAXDtheory and improved graphic multipeak resolution methods. The results calculated aresatisfactory in comparison with the density measurement.     

晶性3，4－聚异戊二烯的结构研究

采用ＷＡＸＤ、ＳＡＸＳ和Ｘ－射线平板照相法研究了不同聚合条件和拉伸倍数下的晶性３，４－聚异戊二烯的结构，结果发现，降低催化体系反应速度有利于产物结晶；不同的含氮类给电子试剂对聚合物的结是昌结构影响较大，取向样品随着拉伸倍数的增加结晶度和长周期增大，微晶尺寸变小，ＳＡＸＳ的散射哟度计算表明，该聚合物属多分散非均一粒子体系，微孔半径在３．５－１６．４ｎｍ间。     

聚乙烯与聚乙烯-乙丙橡胶(聚乙烯-乙丙橡胶-聚乙烯)共混物X-射线衍射谱分析

The feasibility of applying the method of factor analysis to X-ray diffraction spectra of PE/(PE-EPR) and PE/(PE-EPR-PE) blends was examined. The result of mathematical treatment is satisfactory. The number of species and compositions for eight kinds of both PE/(PE-EPR) and PE/(PE-EPR-PE) were determined. The separation of spectra peaks of each species in two kinds of blends contributing spectra intensities was carried out.     

两性淀粉接枝共聚物的就地制备和性质

糊化淀粉经阳离子试剂醚化后再直接与丙烯酸钠(AA-Na)/丙烯酰胺(AM)接枝共聚,制得具有两性的淀粉接枝共聚物。并对淀粉的阳离子试剂醚化、淀粉与AA-Na/AM接枝共聚的接枝率、单体转化率、接枝效率及淀粉的糊化方式对产物性能的影响进行了研究。为工厂就地生产和应用两性淀粉接枝共聚物提供技术依据。     

PHOTOCOPOLYMERIZATION OF MALEIC ANHYDRIDE AND VINYL ACETATE IN TETRAHYDROFURAN~*

The copolymerization of maleic anhydride and vinyl acetate in tetrahydrofuran was studied. Results show that the maximum copolymerization rate is in 0.6 mole fraction of maleic anhydride, indicating the involvement of maleic anhydride-tetrahydrofuran charge transfer complex in the chain initiation process. ESR study provides collateral evidence for the formation of maleic anhydride radical and tetrahydrofuran radical.