At the same time,it is noted that the parameters of the transformed Huang equation are not universal and cannot be used to characterize completely the viscoelastic properties of the LDPE melt. The stress relaxation after cessation of steady shear cannot be described by the transformed Huang equation.

The predicted non-linear time-dependent viscoelastics of the LDPE melt by KBKZ equation were compared with the experimental data and the calculation results obtained by the transformed Huang equation.

The parameters in the transformed Huang equation only reflect the isolate and partial rheological property of the LDPE at particular test condition,while the parameters in the KBKZ equation can characterize the basic viscoelastic of the melt.

Thus,the capability of describing and predicting the time-dependent viscoelastic of the KBKZ equation is superior to that of the transformed Huang equation.

With the Low Shear 30 rheometer and its accessory instruments, two torque decay curves of whole blood from young men(n=32) and women (n=32) were recorded at shear rate 1.285s~(-1) and 2.37s~(-1) respectively. Following Huang's equation, using the non-linear parameter estimation method, we calculated the five thixotropic parameters. The procedure was quiet simple and very easy to be popularized.

With the Low Shear 30 rhe-ometer and its accessory instruments, fourtorque decay curves of whole human bloodfrom a healthy young man were recordedat shear rate 1.285, 1.747, 2.37 and 3.23 s~(-1)respectively for pretesting. The modifiedLevenberg-Marquardt non-linear parameterestimating method was used tocalculate the thixotropic parameters byfollowing Huang′s equation, The resultsshowed that the thixotropic properties ofwhole human blood could be measured byrecording two torque decay curves.

The stress growth experiments show further that the shear stress will descend with the development of time at a constant shear rate of 5、s -1.A transformation of Huang equation was used to describe the thixotropy loop,and the calculated values agree well with the experiment results.

Born-Huang equations of lattice dynamics for the ternary mixed crystal AB_(1-x)C_x by using the random-element-isodisplacement model(REI model) were set up,and the dielectric function and the far-infrared reflectivity of lattice vibration in several ternary mixed crystals were discussed.

The experimental values of the quantities,Ttr and Δtr, and phase transition entropy Δtr were in good agreement with those calculated by the set of Huang equations (1981).

With the Low Shear 30 rheometer and its accessory instruments, two torque decay curves of whole blood from young men(n=32) and women (n=32) were recorded at shear rate 1.285s~(-1) and 2.37s~(-1) respectively. Following Huang's equation, using the non-linear parameter estimation method, we calculated the five thixotropic parameters. The procedure was quiet simple and very easy to be popularized. The results of measuring were comparable to that in Huang's paper. The relationship between HCP and these parameters...

With the Low Shear 30 rheometer and its accessory instruments, two torque decay curves of whole blood from young men(n=32) and women (n=32) were recorded at shear rate 1.285s~(-1) and 2.37s~(-1) respectively. Following Huang's equation, using the non-linear parameter estimation method, we calculated the five thixotropic parameters. The procedure was quiet simple and very easy to be popularized. The results of measuring were comparable to that in Huang's paper. The relationship between HCP and these parameters in the study is consistent with that in our published commumication. The values of τ_o, μ, (ηs-μ), A, ARC in men group were higher than those in women group, but there were no statistical differences of the values of C or n between the two groups. This paper discussed the possible reason of these differences. It was likely that the differences were attributed to higher HCT in men group than that in women group.

With the Low Shear 30 rhe-ometer and its accessory instruments, fourtorque decay curves of whole human bloodfrom a healthy young man were recordedat shear rate 1.285, 1.747, 2.37 and 3.23 s~(-1)respectively for pretesting. The modifiedLevenberg-Marquardt non-linear parameterestimating method was used tocalculate the thixotropic parameters byfollowing Huang′s equation, The resultsshowed that the thixotropic properties ofwhole human blood could be measured byrecording two torque decay curves. Thispproach is much...

With the Low Shear 30 rhe-ometer and its accessory instruments, fourtorque decay curves of whole human bloodfrom a healthy young man were recordedat shear rate 1.285, 1.747, 2.37 and 3.23 s~(-1)respectively for pretesting. The modifiedLevenberg-Marquardt non-linear parameterestimating method was used tocalculate the thixotropic parameters byfollowing Huang′s equation, The resultsshowed that the thixotropic properties ofwhole human blood could be measured byrecording two torque decay curves. Thispproach is much easier than Huang′smethod. We have adopted it to measurethe thixotropic propeties of whole bloodfrom healthy young men (n=32) and youngwomen (n=32). The results were compa-rable to those in Huang′s reports of 1976.The coefficients of variations of most pa-rameters in our measurement were lessthan those in Huang′s reports. Meanwhile,we analysed the advantage in using thenew method and made some suggestionsto improve the measurement accuracy inhuman blood thixotropy.

The thixotropic parametersof whole blood in two groups of childrenwith congenital heart disease (CHD) weremeasured.Group 1. cyanotic heart disease(CCHD), zo cases) Group 2. acyanotic heartdisease (ACHD), 30 cases. Fifty healthychildren were controls matched with thepatients in sex and age. Their thixotropicparameters were compared; the paired t-test was used. In the children with CCHD,the hematocrit (HCT), the yield stress(T_0)the Newtonian contribution of viscosity (μ).the equilibrium value of the structural...

The thixotropic parametersof whole blood in two groups of childrenwith congenital heart disease (CHD) weremeasured.Group 1. cyanotic heart disease(CCHD), zo cases) Group 2. acyanotic heartdisease (ACHD), 30 cases. Fifty healthychildren were controls matched with thepatients in sex and age. Their thixotropicparameters were compared; the paired t-test was used. In the children with CCHD,the hematocrit (HCT), the yield stress(T_0)the Newtonian contribution of viscosity (μ).the equilibrium value of the structural pa-rameter(A), the apparent viscosity at 2.37Sec~(-1)(η_?) and the Non-Newtonian contri-bution of viscosity(η_?-μ)were significantlyhigher than the in corresponding controlgroups. In the children with ACHD, onlythe values of T_0, η_?-μ,and η_? were higherthan those in control groups. All of thethixotropic parameters in CCHD groupwere significantly higher than those inACHD group. Thus we described quantita-tively CHD in terms of thixotropy of blood.The thixotropic parameters of blood couldbe used as indexes of severity forpathologic changes of CHD.