100 weather stations and 17 major weather elements in Shaanxi province are analysed. As a result, the rate of accumulation of the previous three major elements reaches 88.8%.

Based on the previous three major elements, Shaanxi Province is classified into three stage climatic provinces in which there are 5 climatic subzonations, 11 weather zones and 26 weather subzones.

In the last stage, the subject sets out from an overview and makes the final construction and integration according to the previous three stages, resulting in a complete contextual hypothesis which in turn offers the premise for cognitive inferences.

Integrated with the result of previous three parts, the fourth part summarizes the feature of Sino-Japan trade in the Northeast of China region in that period, and the resulting significance.

The Uu infection rates among 4 groups were 62.36%, 63.25%, 66.67% and 40.00% respectively. From group I to group III, the infection rates were no obvious difference among them, but the rate of group IV was significant lower than those of the first three groups (P <0.05).

The first three phasesfocus on the enterprise information integration, and in the last two phases enterprisecomputer application is rnter-enterpnse information integration.

The accumulative variance contribution of the first three principal components was 35.7%. The first principal component encompassed only 20.22% of the total variation.

Examination of the major factors for 17 climatic elements at 100 weather stations of Shaanxi Province shows that the accumulative contribution rate of the first three major factors comes to 88.8 percent.

This is the fifth paper of the serial studies of a new theory of impedance cardiograms purposedby us,In the present paper,we analyze five main reasons which cause tke deviations of Nyboer-Kubicek theory re-sults and clinic experimental results,give some modifications to the original model accorging to the fore three reasons,Furthermore,a new theory of impedance cardiograms is represtented and some primary discussions aboutthe new theory are given.

The stream quality at three headwater application points before treatment had mean pH = 4.63, 4.50, and 4.60, while the respective mean net acidity values were 16.40, 1.60, and 12.84 mg/L.

the mean coefficient of variation of peak height were measured:0.67±0.19%and 2.76±1.02%, and the C. V. of retention time of all compounds was 0.33±0.10%.

Children 7 to 12 years of age were asked to indicate events they had experienced in the previous three months in a questionnaire devised for the study.

Only 3.1% of the children had visited health professionals for psychiatric problems during the previous three months.

They and their families had migrated to Greece within the previous three years.

The previous three kinds of boundary integral equations with indirect unknowns are discussed thoroughly and it is shown that all previous results are not EBIE.

Results also reconfirm the salt tolerance relationship established in the previous three years of the field trial.

Forty five albino rats, anaesthetized with urethane, were injected with guanethidine 10 mg/kg. They were divided into 6 groups. One group served as control. Three groups were killed respectively at 2 min, 10 min, and 2 hr after an intravenous injection. The other two groups were killed at 24 and 48 hr respectively after an intraperitoneal injection. The catecholamine contents in the adrenal glands, aorta, heart, spleen, and kidneys were determined by biological assay. The results revealed that the amount of...

Forty five albino rats, anaesthetized with urethane, were injected with guanethidine 10 mg/kg. They were divided into 6 groups. One group served as control. Three groups were killed respectively at 2 min, 10 min, and 2 hr after an intravenous injection. The other two groups were killed at 24 and 48 hr respectively after an intraperitoneal injection. The catecholamine contents in the adrenal glands, aorta, heart, spleen, and kidneys were determined by biological assay. The results revealed that the amount of noradrenaline in the aorta ran almost parallel to the 3 phases of blood pressure changes, but not the catecholamine contents in other organs. The contents of noradrenaline in aorta, heart, and spleen were nearly depleted at the end of 24 hr, when the blood pressure came down to the lowest level. It is supposed that the chronic phase of hypotension caused by guanethidine is due to the noradrenaline depletion in the organs innervated by sympathetic nerve endings.

In this paper,we have shown that the coefficients of LCAO MO of molecules withperiodical structures can be splitted into two factors,one indicating the positions andthe other the physical properties of the atoms.The first factor is called the geometricalfactor,and the second the physical factor.In terms of these factors,the quantumchemical calculations of molecular orbitals and energy levels axe greatly simplified.We have calculated the LCAO MO and energy levels of coronene and polycene;and have given the simplifid...

In this paper,we have shown that the coefficients of LCAO MO of molecules withperiodical structures can be splitted into two factors,one indicating the positions andthe other the physical properties of the atoms.The first factor is called the geometricalfactor,and the second the physical factor.In terms of these factors,the quantumchemical calculations of molecular orbitals and energy levels axe greatly simplified.We have calculated the LCAO MO and energy levels of coronene and polycene;and have given the simplifid secular equations for polyphenyl and peri-condenseddiphenyl.

本文指出,具有周期性结构的共轭分子 LCAO MO 分子轨道系数可以分解为两个因子,一个为反映原子轨道的几何位置的相位因子,一个为反映原子轨道的性质及原子结构情况的物理因子.相位因子是由原子在分子中的几何位置完全确定的因子.它可以容易地写出来.利用这个结果,可以使分子的久期行列式简化为周期性结构单元的久期行列式.本文还指出直链共轭分子可以当作单环共轭分子计算.我们计算了晕苯、聚省、聚苯及迫位稠合联苯等共轭分子的单电子能谱与分子轨道.前三个分子的计算同文献是一致的,后一个分子的计算未见文献报导.

After a brief review the electromechanical relations of a thin piezoelectric ceramic disc are derived by means of variational calculus,using the displacement distribution of infinitely thin one as primary approximation.It is pointed out that the Rayleigh correction for the resonance frequencies is exact at least to the term of the square of thickness-diameter ratio(h/2a)~2.Our experiments support this conclusion even in the case of strong electromechanical coupling for the values of h/2a up to about 0.17.The...

After a brief review the electromechanical relations of a thin piezoelectric ceramic disc are derived by means of variational calculus,using the displacement distribution of infinitely thin one as primary approximation.It is pointed out that the Rayleigh correction for the resonance frequencies is exact at least to the term of the square of thickness-diameter ratio(h/2a)~2.Our experiments support this conclusion even in the case of strong electromechanical coupling for the values of h/2a up to about 0.17.The thickness correction of the plane electromechanical coupling coefficient k_p is also obtained and discussed.Some tables and curves are given for the purpose of applications.A general analysis of the radial vibration of a thin disc having central hole is dealt with in the appendix.