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| 1 | Fast multipole accelerated boundary element method for the Helmholtz equation in acoustic scattering problems显示文摘We apply the fast multipole method (FMM) accelerated boundary element method (BEM) for the three-dimensional (3D) Helmholtz equation, and as a result, large-scale acoustic scattering problems involving 400000 elements are solved efficiently. This is an extension of the fast multipole BEM for two-dimensional (2D) acoustic problems developed by authors recently. Some new improvements are obtained. In this new technique, the improved Burton-Miller formulation is employed to over-come non-uniqueness difficulties in the conventional BEM for exterior acoustic problems. The computational efficiency is further improved by adopting the FMM and the block diagonal preconditioner used in the generalized minimum residual method (GMRES) iterative solver to solve the system matrix equation. Numerical results clearly demonstrate the complete reliability and efficiency of the proposed algorithm. It is potentially useful for solving large-scale engineering acoustic scattering problems. | LI ShanDe GAO GuiBing HUANG QiBai LIU WeiQi CHEN Jun | 2011 | Science China(Physics,Mechanics & Astronomy)2011，54，8： | 2 |
| 2 | Modeling of moisture diffusivities for components of yellow dent corn kernels显示文摘 | Chen Guibing Dirk E M Osvaldo H C | 2009 | Journal of Cereal Science2009，50，： | 1 |
| 3 | Cellulose production from Gluconobacter oxydans TQ-B2 显示文摘 | Shiru Jia Hongyu Ou Guibing Chen | 2004 | Biotechnol Bioproc E2004，9，3： | 1 |
| 4 | Transcriptomics-based identification and characterization of genes related to sugar metabolism in‘Hongshuijing’pitaya显示文摘Sugar composition not only affects fruit flavor but is also an important determinant of fruit taste and consumer preference.In this study,changes in the sugar content and sugar-metabolizing enzymes were investigated from different sections of various fruit development phases of‘Hongshuijing’pitaya(Hylocereus monacanthus).Genes related to sugar metabolism were also screened by transcriptome analyses.The results indicated that glucose was the major sugar in mature pitaya fruit,and was mainly regulated by vacuolar acid invertase(VAI)and sucrose synthase(SS)(degradative direction).Sugar accumulation varied in pulp between different sections of the pitaya fruit.VAI,neutral invertase(NI)and SS(degradative direction)are crucial enzymes for sugar accumulation in pitaya.The expression of 17 genes related to sucrose metabolism obtained from seven databases[NCBI non-redundant protein database(Nr),NCBI non-redundant nucleotide sequence database(Nt),EuKaryotic Orthologous Groups(KOG),The Protein Families(Pfam),Kyoto Encyclopedia of Genes and Genomes(KEGG),Swiss-prot,and Gene Ontology(GO)]were analyzed in different pitaya pulp sections.HpVAI1 had the highest relative expression level on the 29th day after pollination(DAP).Positive correlations were found between HpVAI1 expression and VAI activity;HpNI4 and NI activity;HpSS2,HpSS5,and SS activity(synthetic direction),indicating that HpVAI1,HpNI4,and HpSS2 and HpSS5 were involved in the regulation of VAI,NI,and SS(synthetic direction),respectively.HpVAI1 and HpNI4 regulated sucrose degradation and the accumulation of glucose and fructose,while HpSS2 and HpSS5 regulated sucrose synthesis.These results suggest that HpVAI1 plays a key role in sugar metabolism during fruit development of‘Hongshuijing’pitaya.The results of this study provide new information about sugar metabolism in pitaya fruit that could help improve fruit quality and the breeding of new cultivars. | Zhike Zhang Yemiao Xing Muthusamy Ramakrishnan Canbin Chen Fangfang Xie Qingzhu Hua Jianye Chen Rong Zhang Jietang Zhao Guibing Hu Yonghua Qin | 2022 | Horticultural Plant Journal2022，8，4： | 1 |
| 5 | A dynamic model of crosslinked corn starch granules swelling during thermal processing显示文摘 | Chen Guibing Campanella Osvaldo H Purkayastha Sidd | 2007 | Journal of Food Engineering2007，81，2： | 1 |
| 6 | Delay time correlation of time of pressure fluctuations in bubbling fluidized bed显示文摘 | ZHAO Guibing CHEN Jizhong YANG Yongrong | 2001 | Journal of Chemical Industry and Engineering2001，12，53： | 1 |
| 7 | Evaluation of suspected local recurrence in lung cancer and head & neck cancer:A comparison between ^(99m)Tc-HL91 SPECT and CT for biopsy proven lesions显示文摘CT has rather low accuracy for the follow-up of tumors after therapy. This study was to determine whether the diagnostic accuracy can be improved with 99mTc-HL91 SPECT in comparison with parallel results of CT imaging. Thirty patients of lung cancer or head & neck cancer, suspected of recurrences on clinical symptoms and CT during clinical follow-up after therapy, underwent 99mTc-HL91 SPECT. The radioactivity ratios of tumor to normal tissues (T/NT) were calculated using the region of interest technique. Results of 99mTc-HL91 SPECT were verified by histopathology. The 99mTc-HL91 average uptake ratios of T/NT in the group of recurrent lesions and non-recurrent lesions were 1.58±0.16 and 1.18±0.14, respectively. A significant difference was found between T/NT data of the two phases (t=4.87, P<0.001). The 99mTc-HL91 SPECT shows sensitivity of 72.73%, specificity of 89.47% and accuracy of 83.83% for differentiating recurrent lesion, while the CT shows sensitivity of 63.63%, specificity of 84.21% and accuracy of 76.67%. A combination of 99mTc-HL91 SPECT and CT for 21 patients with lung cancers or head & neck cancers with congruent results shows sensitivity of 100%, specificity of 94.12% and accuracy of 95.23%. It is concluded that 99mTc-HL91 SPECT may play a role in differentiating recurrent lesions in patients with lung cancer and head & neck cancer. Furthermore, the combination of CT and 99mTc-HL91 SPECT is a more effective method for diagnosing recurrence of lung cancer and head & neck cancer. | SU Xinhui SUN Long HUANG Jingxiong CHEN Guibing HE Xiaojiang LUO Zuoming PAN Weimin CHEN Qiang WU Hua | 2008 | Nuclear Science and Techniques2008，19，6： | 0 |
| 8 | Complement of ^(99m)Tc-octreotide scintimammography to mammography in evaluating breast cancers显示文摘In this paper,the 99mTc-octreotide scintimammography as a useful complementary technique of mammography was evaluated in diagnosing breast cancers.The 45 breast lesions were consecutively detected by mammography,and 99mTc-octreotide scintimammography,and both combination technique on the basis of self-examination,physical examination.Clinical diagnosis was confirmed by histopathologic analysis.Radioactivity uptake ratios for tumor vs normal breast tissues (T/NT) were calculated using regions of interest.In the breast cancer groups and the benign lesion groups,the average uptake ratios of the 99mTc-octreotide were 1.63±0.19 and 1.09±0.13,respectively,and t was 9.638 (P<0.001).Based on sensitivity,specificity,accuracy,positive predicting value,and negative predicting value,99mTc-octreotide scintimammography was 87%,79%,84%,90%,and 73%,the mammography was 65%,64%,64%,80%,and 45%,and both combination was 95%,100%,97%,100% and 92%,respectively.This showed that the 99mTc-octreotide scintimammography was more useful than mammography in the evaluating suspected breast cancers,and the combination technique can accurately discriminate lesions. | SU Xinhui HE Xiaojiang WU Hua PAN Weiming HUANG Jingxiong YU Hao CHEN Guibing WANG Wei | 2010 | Nuclear Science and Techniques2010，21，1： | 0 |
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