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121, Methods A self-designed questionnaire survey was used to investigate a cluster stratified sample of 1010 college students.

122, Methods A large - scale survey was conducted at 250 medical health units based on stratified sampling.

123, Single - shot multiwave - multicomponent records are acquired on physical models of homogeneous isotropic stratified and oblique media with both in -line and out-of-line methods.

124, Method Some food processing employees were selected according to stratified random sampling method, and filled in a unified questionnaire anonymously.

125, Methods A cluster stratified sample of 1681 students ham Jianghan University were investigated by SDS.

126, METHOD:63 medical institutes nurses have been investigated by Stratified cluster sampling RESULTS. nurses of medical institutes are scarce and their qualities are low.

127, This theory was verified by the experiment of stratified sampling chemical analysis of silicon carbide material.

128, By using the adaptive digital filtering method, numerical integration of responsing field of the sonde in plane stratified media has been carried out.

129, The corrosion test, impact test and reaction-to-fire test results show that the stratified composite slabs have excellent corrosion resistant, toughness and firer...

130, The accuracy of flow pattern identification of stratified flow, annular flow[sentencedict.com], core flow and homogeneous flow is more than 95% and the speed of flow pattern identification is less than 0.3s.

131, The sky island Chisos Mountains harbor stratified life zones and endless opportunities to juxtapose harsh desert agave and cacti with delicate floral displays.

132, Two features of folds in stratified rocks that contain strut members invite special attention.

133, Multiple stratified cluster sampling method was used in the Health Service Investigation on residents in Weihai.

134, The propagation of guided waves in stratified half-space media is studied in this paper.

135, A closer view of the stratified mountain peak carved by glaciers.

136, With regularly oriented iron fibers, stratified polycrystalline iron fibers absorbing material shows macroscopic electromagnetic anisotropy.

137, As a common sampling method in modern statistics, stratified sampling attracts much attention in practice. It has higher sampling precision than random sampling.

138, This study is based on a stratified random sampling sur-vey on passengers traveling by Taipei Metro.

139, Methods: According to the principle of stratified proportional sampling, a total of 1605 adult subjects from 17 cities and their surrounding rural areas of China was measured by CWVDT.

140, Only dielectric stratified media will be treated in this section.

141, Methods 1589 third grade pupils sampled from 10 provinces and cities by stratified cluster sampling.

142, Landing gear: the stratified wood landing gear covered with epoxy glass (or epoxy carbon fiber) is much more aerodynamic.

143, Stratified silicate is found to be main reactive component of both of them.

144, Methods Stratified sampling methods were used to carry out the prevalence study of maternity and child care for women at child bearing-age in Luochuan County and Bin County.

145, Though stratified random sampling method is adopted for the arterial and collector functional systems,(http://sentencedict.com/stratified.html) there is a good potential to improve it.

146, The results indicated that, at the end of compress stroke, the mixture in cylinder was stratified and richer ignitable mixture was concentrated around the spark plug under the action of the lon...

147, Methods Cluster, stratified and multistage sampling was taken. 1261 residents over 40 years old were assigned to fill in the questionnaires designed by WHO.

148, During the course of cluster sample verification, systematic sampling and stratified sampling"s accuracy are prior to simple random sampling"s.

149, Methods: A randomized prospective pilot study, stratified according to severity, was performed in 30 consecutive patients with acute pancreatitis requiring jejunal nutrition.

150, Method Stratified sampling method, 4185 women from the community in different physiological period, 660 women were randomly selected for the survey.