The sensitivity of the three electrocardiographic diagnostic indices of P wave is relatively low (58%-71%) ,but its specificity is high (83%-94%), among which PTFV1< -30mm·ms is the highest in value.

The statistic analysis of 3 000 STYLE modl engines showed that among the engines parts, about 23.7 % in quantity, 14.4 % in weight and 12.3 % in value could be directly reused.

It also put forward the concept of "necessary sweep—invalue" in the calculation of EFP hit probability,. But this paper has not discussedactivation probability P_2 by reason of paper length.

raising garlic grades,improving garlic quality,contrasting the income of increase was 3712.17～6566.54 yuan/hm~2,the rate of increase in value reached 16.4%～27.3%.

After treatment with caffeine 10 mmol·L-1, the increase in value of δ T % were significantly higher in LVH and CHF compared with that in Sham-operated control ( P < 0.01).

A nonlinear equation containing a highest derivative of third order is obtained in the vicinity of the caustic for the case of special media in which the limiting velocities of sound in the mixture at rest are close in value.

The yields with reference to the efficiency of the devices were shown to be close in value in all cases.

It is shown that within 4.2-200 K the yield point σsm of the composite is higher than that for copper, attaining 680 MPa at 4.2 K, then the yield points are close in value up to room temperature, and diverge again as the temperature is raised.

It was shown that the contributions to this activity can differ in value and sign and that the ratio between these contributions depends on the transition type.

It was established that, in the presence of PdCl2, the adsorption becomes greater in value and reversible.

It is, quite a laborious work to make an analysis and calculation of the performance of the extra long-distance trantmission line. Using the new equivelant circuit as shown in fig.I. the analysis and calcuation work can be simplified a great deal.Each element in fig.I.is represented as in the following: a──negative phase -shifting element; b──losing element; c──ideal element; d──positive phase-shifting element. It is worth mentioning,however,that the element b and c are intecchangable in position,without causi8ng...

It is, quite a laborious work to make an analysis and calculation of the performance of the extra long-distance trantmission line. Using the new equivelant circuit as shown in fig.I. the analysis and calcuation work can be simplified a great deal.Each element in fig.I.is represented as in the following: a──negative phase -shifting element; b──losing element; c──ideal element; d──positive phase-shifting element. It is worth mentioning,however,that the element b and c are intecchangable in position,without causi8ng the slightest effect on each terminal of the line.Therefore we may select the position at will according to the conveniency of calculation. Using the equivelent circuit we can determine the uoltage and current on any point of the line which sustains losses.For example,the voltage and current in point X (fig.2)is determined by: is the uoltage and current at the point x of the line after the later eing idealized. By employing the equivelent circuit we can greatly simplify our work in determin- in the loseses in the transmission line.As in Fig.I we have Since the Sh βι and Sinξ is very small in value ,its high power can be neglected,these we obtained No less a conveniency and simplicity will also be found,if we use the equivelent circuit to determine transmisson line with any compensated parameters.

In the present paper the copolymerization of styrene and methyl-metha- crylate under γ-irradiation was investigated; the influence of temperature and solvent on the mechanism of copolymerization was also discussed. In bulk polymerization, free radical mechanism proceeds from-35℃ up to the room temperature; when copolymerization is carried out in ethyl bromide solution at-20℃ to-78℃, cationic and free radical mechanisms exist simultaneou- sly; by further lowering reaction temperature, cationic mechanism becomes...

In the present paper the copolymerization of styrene and methyl-metha- crylate under γ-irradiation was investigated; the influence of temperature and solvent on the mechanism of copolymerization was also discussed. In bulk polymerization, free radical mechanism proceeds from-35℃ up to the room temperature; when copolymerization is carried out in ethyl bromide solution at-20℃ to-78℃, cationic and free radical mechanisms exist simultaneou- sly; by further lowering reaction temperature, cationic mechanism becomes predominant. The reactivity ratios at different temperature were calculated both in bulk and in solution polymerization. The activation energy with respect to both bulk and solution polymerization and the difference in value of activation energy between homopolymerization and copolymerization were determined.

From the point of view of fracture mechanics, we studied the far displacement field produced by a disk-shaped pure shear fracture and obtained an analytic expression for that field. Then, by using this expression we calculated the form of the impulse and its spectrum and found a relation between the corner frequencies fcα,fcβ of the P and 8 waves and the fracturing radius of the earthquake focus, i.e. fcα = 0.6/t2α = 0.6/al/vr + π/4α) and fcβ = 0.45/t2β = 0.45/a(1/vr + β/4β), where t2α and t2β are respectively...

From the point of view of fracture mechanics, we studied the far displacement field produced by a disk-shaped pure shear fracture and obtained an analytic expression for that field. Then, by using this expression we calculated the form of the impulse and its spectrum and found a relation between the corner frequencies fcα,fcβ of the P and 8 waves and the fracturing radius of the earthquake focus, i.e. fcα = 0.6/t2α = 0.6/al/vr + π/4α) and fcβ = 0.45/t2β = 0.45/a(1/vr + β/4β), where t2α and t2β are respectively the average values on the focal sphere of the impulse widths of the earthquake focus of the P and S waves, vr is the velocity of fracturing, taking as 0.775 β;α,β are the velocities of the P and 8 waves. In neglecting the delay factor of theray paths e-iwr/c, the effect of the absorption of the media resembles a minimum phase-shift filter. Employing Hilbert Transform, the frequency response .B(w) =exp of the media was found, in which t*=r/CQ, where r, the distance from the earthquake focus; c, velocity of waves; Q, quality factor of the media and wm, the high cut frequency. This expression is different from that of Futterman. After taking into consideration of the effect of the absorption of the media and the frequency characteristics of the instruments, the earthquake focal dimension 2a and the seismic moment M0 in the frequency domain were obtained. While in the time domain, fast Fourier Inverse Transform was used to get the impulse response of the media and the instruments and then convolved with the impulse of the earthquake focus to construct the synthetic seismogram. From it we can get the relation between the initial half period T2P and the dimension 2a or impulse width t2α of the earthquake focus. Then draw the nomogram for this relation. From the nomogram we can get 2a, the focal dimension. The value is essentially the same as that obtained in the frequency domain.Based on the relation Ms = 21og(2a) +1/1.5, as the outcomeof the study of fracture processes of the earthquake focus in the light of frecture mechanics, we were able to find the regional shear stressτ0 of the Peking-Tientsin-Tangshan-Zhangjiakou area. Here, η, efficiency of rediation of the earthquake, taking as 0.05: v, Poisson Eatio, taking as 0.252; μ, rigidity modulus, taking as 3.3 1011 dyne/cm2. Computations show that before the Tangshan Earthquake of July 28, 1976, the stress value of the Tangshan-Fengnan area was the highest, reaching a value of 870 bars. But in the Changli area, at a distance of about 100 km away, the stress had a value of only 200 bars. After the Tangshan Earthquake, in the Tangshan-Fengnan area, located in the central portion of the earthquake fault zone, To dropped to 100 bars. However, at both ends of the fault zone, the stress was still very high in value, especially at the southwestern end, in the vicinity of Ninghe, the stress value there was 400-500 bars. Until November 15, 1976, a strong aftershock of magnitude 6.9 occurred here, after which the stress value decreased to 200 bars.