Search Results - "Zhu, X R"

Theoretical variance analysis of single- and dual-energy computed tomography methods for calculating proton stopping power ratios of biological tissues by Yang, M, Virshup, G, Clayton, J, Zhu, X R, Mohan, R, Dong, L

“…We discovered an empirical relationship between the logarithm of mean excitation energy (ln Im) and the effective atomic number (EAN) of human tissues, which…”
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Onset of Asian desertification by 22 Myr ago inferred from loess deposits in China by Guo, Z. T, Ruddiman, William F, Hao, Q. Z, Wu, H. B, Qiao, Y. S, Zhu, R. X, Peng, S. Z, Wei, J. J, Yuan, B. Y, Liu, T. S

“…The initial desertification in the Asian interior is thought to be one of the most prominent climate changes in the Northern Hemisphere during the Cenozoic…”
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identification of flavonoids and the expression of genes of anthocyanin biosynthesis in the chrysanthemum flowers by Chen, S. -M, Li, C. -H, Zhu, X. -R, Deng, Y. -M, Sun, W, Wang, L. -S, Chen, F. -D, Zhang, Z

“…In order to provide additional information on the coloration of chrysanthemum flowers, the flavonoid composition and the expression of six structural genes…”
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New evidence on the earliest human presence at high northern latitudes in northeast Asia by Zhu, R. X, Potts, R, Xie, F, Hoffman, K. A, Deng, C. L, Shi, C. D, Pan, Y. X, Wang, H. Q, Shi, R. P, Wang, Y. C, Shi, G. H, Wu, N. Q

“…The timing of early human dispersal to Asia is a central issue in the study of human evolution. Excavations in predominantly lacustrine sediments at Majuangou,…”
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Commissioning dose computation models for spot scanning proton beams in water for a commercially available treatment planning system by Zhu, X. R., Poenisch, F., Lii, M., Sawakuchi, G. O., Titt, U., Bues, M., Song, X., Zhang, X., Li, Y., Ciangaru, G., Li, H., Taylor, M. B., Suzuki, K., Mohan, R., Gillin, M. T., Sahoo, N.

“…Purpose: To present our method and experience in commissioning dose models in water for spot scanning proton therapy in a commercial treatment planning system…”
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Timing of the Jiufotang Formation (Jehol Group) in Liaoning, northeastern China, and its implications by He, H. Y., Wang, X. L., Zhou, Z. H., Wang, F., Boven, A., Shi, G. H., Zhu, R. X.

“…The timing of the Jiufotang Formation remains speculative despite recent progress in the study of the Jehol Biota. In this paper we contribute to this topic…”
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Insight into the geodynamics of cratonic reactivation from seismic analysis of the crust-mantle boundary by Zheng, T. Y., Zhao, L., Zhu, R. X.

“…The reactivation of craton is a crucial issue for the understanding of continent lithosphere. Although the partial loss of the thick lithospheric root of the…”
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Insight into modification of North China Craton from seismological study in the Shandong Province by Zheng, T. Y., Zhao, L., Xu, W. W., Zhu, R. X.

“…The study region is located in the southeast edge of the North China Craton (NCC), which is an Archean craton that underwent removal and modification of the…”
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Early evidence of the genus Homo in East Asia by Zhu, R.X., Potts, R., Pan, Y.X., Yao, H.T., Lü, L.Q., Zhao, X., Gao, X., Chen, L.W., Gao, F., Deng, C.L.

“…The timing and route of the earliest dispersal from Africa to Eastern Asia are contentious topics in the study of early human evolution because Asian hominin…”
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Intensity modulated proton therapy treatment planning using single-field optimization: The impact of monitor unit constraints on plan quality by Zhu, X. R., Sahoo, N., Zhang, X., Robertson, D., Li, H., Choi, S., Lee, A. K., Gillin, M. T.

“…Purpose: To investigate the effect of monitor unit (MU) constraints on the dose distribution created by intensity modulated proton therapy (IMPT) treatment…”
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40Ar/39Ar dating of Lujiatun Bed (Jehol Group) in Liaoning, northeastern China by He, H. Y., Wang, X. L., Zhou, Z. H., Jin, F., Wang, F., Yang, L. K., Ding, X., Boven, A., Zhu, R. X.

“…The Lujiatun bed of the Yixian Formation is famous for its extraordinary preservation of three‐dimensional fossils and its implication for the most dramatic…”
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Assessment of the accuracy of an MCNPX-based Monte Carlo simulation model for predicting three-dimensional absorbed dose distributions by Titt, U, Sahoo, N, Ding, X, Zheng, Y, Newhauser, W D, Zhu, X R, Polf, J C, Gillin, M T, Mohan, R

“…In recent years, the Monte Carlo method has been used in a large number of research studies in radiation therapy. For applications such as treatment planning,…”
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Effect of the Eutectic Phase on the Microstructure and Tensile Strength of an Al–Zn–Ni–Mg–Cu Casting Aluminum Alloy by Chen, D. H., Chen, Z., Zhu, X. R., Wang, X. D., Hong, X. L.

“…The effect of composition, casting, and heat treatment on the eutectic phase morphology of an Al–Zn–Ni–Mg–Cu casting aluminum alloy was studied. The effect of…”
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40Ar/39Ar dating of ignimbrite from Inner Mongolia, northeastern China, indicates a post-Middle Jurassic age for the overlying Daohugou Bed by He, H. Y., Wang, X. L., Zhou, Z. H., Zhu, R. X., Jin, F., Wang, F., Ding, X., Boven, A.

“…The 40Ar/39Ar step heating analyses of K‐feldspar derived from the ignimbrite in Inner Mongolia, China indicates that they were formed at 159.8 ± 0.8 Ma, which…”
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Does kV-MV dual-energy computed tomography have an advantage in determining proton stopping power ratios in patients? by Yang, M, Virshup, G, Clayton, J, Zhu, X R, Mohan, R, Dong, L

“…Conventional kilovoltage (kV) x-ray-based dual-energy CT (DECT) imaging using two different x-ray energy spectra is sensitive to image noise and beam hardening…”
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Earliest presence of humans in northeast Asia by Huang, W. W, Guo, B, Potts, R, Deng, C. L, Shi, C. D, Yuan, B. Y, Zhu, R. X, Guo, Z. T, Hoffman, K. A, Pan, Y. X, Hou, Y. M

“…The timing of the earliest habitation and oldest stone technologies in different regions of the world remains a contentious topic in the study of human…”
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Evaluation of Kodak EDR2 film for dose verification of intensity modulated radiation therapy delivered by a static multileaf collimator by Zhu, X. R., Jursinic, P. A., Grimm, D. F., Lopez, F., Rownd, J. J., Gillin, M. T.

“…A new type of radiographic film, Kodak EDR2 film, was evaluated for dose verification of intensity modulated radiation therapy (IMRT) delivered by a static…”
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Diel variability of soluble Fe(II) and soluble total Fe in North African dust in the trade winds at Barbados by Zhu, X. R., Prospero, J. M., Millero, F. J.

“…There is increased interest in the deposition of wind‐transported mineral dust to the oceans because of the possible role that iron might play as a limiting…”
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Magnetic resonance imaging retinal oximetry: a quantitative physiological biomarker for early diabetic retinopathy? by Yang, Y., Zhu, X. R., Xu, Q. G., Metcalfe, H., Wang, Z. C., Yang, J. K.

“…Diabet. Med. 29, 501–505 (2012) Aims  To assess the efficacy of using magnetic resonance imaging measurements of retinal oxygenation response to detect early…”
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Performance of gas source MBE-grown wavelength-extended InGaAs photodetectors with different buffer structures by Zhang, Y.G., Gu, Y., Tian, Z.B., Wang, K., Li, A.Z., Zhu, X.R., Zheng, Y.L.

“…Wavelength-extended In y Ga 1− y As photodiodes with cut-off wavelengths of 2.0, 2.4 and 2.7 μm at room temperature were grown using gas source molecular beam…”
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