Building industrial network in park district has becoming a crucial point to extend new advantage in new round of economic development of park district economy.

The results show that R32/R134a/R227ea and R32/R125/R227ea are comparable to R22 at value of COP and Qv. Moreover, the obvious superiority to R410A is that its condensation pressure is greatly reduced and even less than that of R22 which give this mixture much more advantage in replacement.

The result shows that the catalyst is featured by high catalytic activity and advantage in economy when the best polymerization conditions with the reaction temperature at 170 ℃ , reaction pressure at 6.0 MPa , the volume velocity at 0. 5 h- 1 , the micro- wetness air temperature at 45 ℃ , the reaction temperature at 800 ℃ and 12% mass fraction of active composition.

Nimodipine revealed a effect on reducing calcium in the brain cortex and showed an advantage in treatment of traumatic brain edema. The level of calcium in the brain cortex was 16.78±4.98mmol/kg dry brain cortex and brain fluid content was 78.98±0.89 in the white matter.

This paper first introduces new developing network model P2P. Then it introduces BEEP protocol frame in detail, and the advantage in P2P's protocol design, especially in realizing the security of P2P.

Clonal seedlings showed a great advantage in the initial stages, but this advantage disappeared after 15 years.

The results indicate that CCLC has the advantage in recuperating exergy from flue gas, but it cannot sufficiently convert the recuperated exergy to useful work.

Geographic information system (GIS), as a useful tool to analyze and manage spatial information, has a superior advantage in this field.

Bodies of the investigated class have a substantial advantage in comparison with an equivalent cone and, for not very slender bodies, also in comparison with Kármán's ogival-shaped body.

It is demonstrated that the methods of fluctuation diagnostics may be used to advantage in developing devices for monitoring (in real time) and control of plasma PFs of different types for the purpose of increasing their reliability and service life.

A new method for the ring analysis and branching analysis of mineral oil fractions and aromatic concentrates is described.Based on the conception of addability of specific refraction and of molecular parachor,formulae for cal- culating the number of aromatic rings per mean molecule(R_A),total number of rings per mean molecule(R_T),and degree of branching were derived. Comparison of this new method with the“direct method”was made,it is concluded which is more reliable than the methods conventionally used.Degree...

A new method for the ring analysis and branching analysis of mineral oil fractions and aromatic concentrates is described.Based on the conception of addability of specific refraction and of molecular parachor,formulae for cal- culating the number of aromatic rings per mean molecule(R_A),total number of rings per mean molecule(R_T),and degree of branching were derived. Comparison of this new method with the“direct method”was made,it is concluded which is more reliable than the methods conventionally used.Degree of branching calculated by this new method also agree with the value calcu- lated by Boelhouwer-Waterman method on the same oil after hydrogenation, however,the advantage in using this new method is that the hydrogenation of the oil fraction analyzed may be omitted. Introducing certain assumptions,this method can be simplified,thus the R_A and R_T can be calculated from r_(LL),M,%C and %H.The basic data of 38 mineral oil fractions and aromatic concentrates with R_A from 0.2 to 3.3 and R_T from 1.0 to 4.8 which are found from the literature have been used to calculate R_A and R_T by this simplified method,and the results are compared with those calculated by“direct method”,n-d-M method,and Hazelwood method.The average deviations of this simplified method from the“direct method”for R_A are ±0.03 when R_A<2,±0.06 when R_A>2,and for R_T are ±0.08 when R_A<2,±0.09 when R_A>2,respectively.It is obviously that for both aromatic concentrates and paraffinic oil fractions,the new method is more accurate than the other two methods. Application of this new method to calculate R_A and R_T of olefin containing oils such as cracking cycle stocks or shale oil fractions is also discussed.

This paper described the theoretical basis and practical calculation for analyzing fading records obtained by close-spaced recievers in the study of the small-scale irregularities in the ionosphere. Two new correlation methods, the cross-point method (C. P. M.) and the ten-point method (T. P. M.), were proposed and compared experimentally with Phillips and Spencer's complete correlation method (P. S. M.) and Yerg's six-point method (S. P. M.). It is concluded that the C. P. M., compared with other methods, is...

This paper described the theoretical basis and practical calculation for analyzing fading records obtained by close-spaced recievers in the study of the small-scale irregularities in the ionosphere. Two new correlation methods, the cross-point method (C. P. M.) and the ten-point method (T. P. M.), were proposed and compared experimentally with Phillips and Spencer's complete correlation method (P. S. M.) and Yerg's six-point method (S. P. M.). It is concluded that the C. P. M., compared with other methods, is more exact and provides for more information about the ionospheric irregularities. The C. P. M., as well as the P. S. M., require the determination of the auto-correlation function of one record and the cross-correlation functions between the three records taken in pairs, and it is therefore quite laborious. Then it is shown that there are some advantages in the application of the T. P. M. which provides for informations as much as that of the C. P. M. and as exact as that of the P. S. M., although the calculation is much simpler, as only 8—10 values of correlation coefficient are required. Moreover, it is pointed out that, utilizing the so called "time-lag plots" y_θ, x_θ, the accuracy of the T. P. M. can be further improved. Therefore it is suggested that the T. P. M. should be adopted as a routine, while the C. P. M. or the improved T. P. M. should be adopted for special occasions or special events for which more accurate results are required. for special occasions or special events for which more accurate results are required. In the viewpoint of labour-saving, applications of the structure function and the aftereffect function to the correlation analysis are discussed. In this paper the author also proposed an extrapolation and interpolation method of the value of correlation coefficient for any spacing and/or any time lag. Consequently, some criteria were established for checking the reliability of the calculated values of ionospheric parameters. Especially the occurrence of imaginary value of the random movement and change velocity can be almost always prevented in the course of analysis.

Where difficulty has been encountered in obtaining good reflections, it has become almost a general practice to use a group of seismometers insteads of a single seismometer in a channel. One of the primary advantages in such a method is to increase the ratio of useful to extraneous energy recorded in seismogram. If the seismometers are too near to each other, benefit is seldom obtained, because all seismometers in a channel might be considered to be placed at a single point and multiple detection is only...

Where difficulty has been encountered in obtaining good reflections, it has become almost a general practice to use a group of seismometers insteads of a single seismometer in a channel. One of the primary advantages in such a method is to increase the ratio of useful to extraneous energy recorded in seismogram. If the seismometers are too near to each other, benefit is seldom obtained, because all seismometers in a channel might be considered to be placed at a single point and multiple detection is only a method of increasing the amplitude both of useful and of extraneous energy. As the separation of seismometers becomes large enough, microseism can be assumed as a random noise, the signal to noise ratio will be increased n~(1/2) times by using multiple detection, when the effective waves strike the seismometers fairly well in phase. But where reflected waves from strong dipping or shallow beds are involved, the discriminatory powers of seismometers might defeat its purpose unless the seismometers in each group are closely spaced. Assuming microseisms to be plane waves traveling to the earth surface from random directions, the problem of how far the detection can be improved when the seismometers in a single group are closely spaced is studied in detail. It is shown that the relative amplitude of microseisms in the records depends statistically not only on the numeber of seismometers in a single group, but also on distances between them, the microseismic frequency spectra and the elastic velocity in the medium. The result obtained in this paper can be used as a guide for choosing multiple seismometer confiquration in seismic field operation.