When the B2O3/TiO2 mole ratio is zero, the reinforcements of the composites are α-Al2O3 and Al3Ti, the ultimate tensile strength (σb) and elongation (5) are 250.4 MPa and 4.0% respectively (room temperature). The fracture mechanism of the composite is characterized by cracks initiating firstly in Al3Ti rods and then propagating to the interface.

The result of the seedling raising research, using single-bud stem segment ofBougainvillea glabra as the propagating material, shows that the culture medium suitablefor bud inducing and multiplication is: MS+BA1～2 (mg/L) +NAA0. 4～1 (mg/L). Different strains need different concentration of additional BA and NAA;

The growth rate of callus in one month was 12.70. The best medium for multiplying clumpy buds was B\-\{5\}+BA 0.5 mg/L+IAA 0.2 mg/L, the highest propagating ratio reached 25.5. These results could meet the technology requirements of rapid\|propagation in large scale production.

In order to protect and use the natural resources of the porcupines betterly,the authors have proceeded to investigation of the artificial propagating porcupines in 1999.3～2004.4.Result enunciation: The sex-mature age of the female porcupines is 10～12 month age,the sex-mature age of male porcupines is 12～14 month age;

The results show that ploymer addition can not only make the ignition of thermite type reaction more easily and accelerate the propagating velocity of combustion wave,but also enhance the temperature of self propagating combustion and change the combustion mode of Al Cr 2O 3 system from oscillating mode to near stable plane mode.

Adding Fe 3O 4+Al system with suitable addition in raw Fe 2O 3+Al system could cause combustion temperature, propagating rate and SHS transformation rate to be increased, whereas addition of Fe 3O 4+Al system in Fe 2O 3+Al system was beyond certain value, combustion temperature and SHS transformation rate could be reduced though propagating rate was increased further.

A suitable addition of Fe_3O_4+Al system to the Fe_2O_3+Al system could cause combustion temperature,propagating rate and SHS transformation rate to be increased,whereas the addition of Fe_3O_4+Al system in the Fe_2O_3+Al system was beyond certain value,the combustion temperature and SHS transformation rate could be reduced though propagating rate was increased further.

The scattering of plane time-harmonic electromagnetic waves propagating in a homogeneous chiral environment by a perfectly conducting grating is studied.

Permissions propagating to control, conflict and cyclic in delegable model were analyzed and resolved.

Compared with conventional methods, this motion measurement algorithm based on multi-level simultaneous wavelet transform avoids propagating errors between the decomposed levels.

In this review article, we discuss both experimentally and theoretically the second-order double-slit interference for a thermal light source which is random in transverse propagating direction.

Much of our work has direct impact on the study of similar discrete phenomena in systems beyond optics, including sound waves, water waves, and matter waves (Bose-Einstein condensates) propagating in periodic potentials.

This paper is a supplement to the author's previous paper "The Constants and Analysis of Rigid Frames", published in the first issue of the Journal. Its purpose is to amplify as well as to improve the method of propagating joint rotations developed, separately and independently, by Dr. Klouěek and Prof. Meng, so that the formulas are applicable to rigid frames with non-prismatic bars and of closed type. The method employs joint propagation factor between two adjacent joints as the basic frame constant...

This paper is a supplement to the author's previous paper "The Constants and Analysis of Rigid Frames", published in the first issue of the Journal. Its purpose is to amplify as well as to improve the method of propagating joint rotations developed, separately and independently, by Dr. Klouěek and Prof. Meng, so that the formulas are applicable to rigid frames with non-prismatic bars and of closed type. The method employs joint propagation factor between two adjacent joints as the basic frame constant and the sum of modified stiffness of all the bar-ends at a joint as the auxiliary frame constant. The basic frame constants at the left of right ends of all the bars are computed by the consecutive applications of a single formula in a chain manner. The auxiliary frame constant at any joint where it is needed is computed from the basic frame constants at the two ends of any bar connected to the joint, so that its value may be easily checked by computing it from two or more bars connected to the same joint.Although the principle of this method was developed by Dr. Klouěek and Prof. Meng, the formulas presented in this paper for computing the basic and auxiliary frame constants, besides being believed to be original and by no means the mere amplification of those presented by the two predecessors, are of much improved form and more convenient to apply.By the author's formula, the basic frame constants in closed frames of comparatively simple form may be computed in a straight-forward manner without much difficulties, and this is not the case with any other similar methods except Dr. Klouěek's.The case of sidesway is treated as usual by balancing the shears at the tops of all the columns, but special formulas are deduced for comput- ing those column shears directly from joint rotations and sidesway angle without pre-computing the moments at the two ends of all the columns.In the method of propagating unbalanced moments proposed by Mr. Koo I-Ying and improved by the author, the unbalanced moments at all the bar-ends of each joint are first propagated to the bar-ends of all the other joints to obtain the total unbalanced moments at all the bar-ends, and then are distributed at each joint only once to arrive at the balanced moments at all the bar-ends of that joint. Thus the principle of propagating joint rotations with indirect computation of the bar-end moments is ingeneously applied to propagate unbalanced moments with direct computation of the bar-end moments, and, at the same time, without the inconvenient use of two different moment distribution factors as necessary in all the onecycle methods of moment distribution. The basic frame constant employed in this method is the same as that in the method of propagating joint rotations, so that its nearest approximate value at any bar end may be computed at once by the formula deduced by the author. Evidently, this method combines all the main advantages of the methods proposed by Profs.T. Y. Lin and Meng Chao-Li and Dr. Klouěek, and is undoubtedly the most superior one-cycle method of moment distribution yet proposed as far as the author knows.Typical numerical examples are worked out in details to illustrate the applications of the two methods.

In this paper a method for computing the influence lines in open rigid frames is presented. This method is based on the Müller-Breslau's principle that every deflection diagram is an influence line. If any section of a given rigid frame, at which the influence llne of any stress function——such as reaction, shear, bending moment and torsion——is desired, is allowed to produce freely a corresponding unit deformation, the deflection diagram of this frame will be the same as the influence of that stress function.The...

In this paper a method for computing the influence lines in open rigid frames is presented. This method is based on the Müller-Breslau's principle that every deflection diagram is an influence line. If any section of a given rigid frame, at which the influence llne of any stress function——such as reaction, shear, bending moment and torsion——is desired, is allowed to produce freely a corresponding unit deformation, the deflection diagram of this frame will be the same as the influence of that stress function.The fundamental idea of this method is that the angle-changes at ends of bars due to unit deformation can be determined by propagating joint rotations and that the resulting deflection diagram which is the same as the influence line of the corresponding stress function may be determined by method of conjugate beam.Typical numerical examples are worked out to show the application of this method.

The analysis of rigid frames with so called "span-change" beams such as curved, gabled, folded or trussed ones is rather difficult. The method of redundant forces or method of slope deflection are too tedious to be used in practical work. In this paper a new method namely the method of propagating unbalanced moments and lateral forces is proposed for analyzing such frames.The principle of this method is some what like that of the one cycle method of moment distribution for analyzing rigid frames with straight...

The analysis of rigid frames with so called "span-change" beams such as curved, gabled, folded or trussed ones is rather difficult. The method of redundant forces or method of slope deflection are too tedious to be used in practical work. In this paper a new method namely the method of propagating unbalanced moments and lateral forces is proposed for analyzing such frames.The principle of this method is some what like that of the one cycle method of moment distribution for analyzing rigid frames with straight beams and its procedure may be briefly described as follows: the unbalanced moments and lateral forces at all joints of the frame are calculated first and propagated successively to all the other joints by means of a set of the so-called constants of deformation-propagation, which are to be computed from the properties of the frame only. Then its original and various propagated unbalanced moments and lateral forces at each joint are summed up and distributed among all the bar-ends at that joint according to special formulas to obtain the distributed moment and lateral force at each bar-end. Finally, the balanced moment and lateral force at each bar-end are obtained simply by summing up the following three components respectively: (1) those at each bar-end assumed fixed, M~F and H~F; (2) those propagated to each bar-end, M~P and H~P; and (3) those distributed to each bar-end, M~D and H~D. That is:M=M~F+M~P+M~D, H=H~F+H~P+H~D.Evidently, the procedure of this method is very simple and direct, and the work of calculations is greatly reduced, especially when any span-change rigid frame is to be analyzed for many loading conditions.Two typical examples are given in this paper to illustrate the application of the method and the author hopes deeply that this method will be found usefull by the structural engineers in designing such rigid frames.