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Calculations of dynamic multipolar polarizabilities of the Cd clock transition levels

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Chinese Physics b 2021年第8期30卷 295-300页

作者： mi Zhou Li-Yan Tang State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics Wuhan Institute of Physics and MathematicsInnovation Academy for Precision Measurement Science and TechnologyChinese Academy of SciencesWuhan 430071China University of Chinese Academy of Sciences Beijing 100049China

The pursuit of a systematic frequency uncertainty beyond 10^(-18) clock has triggered a multitude of investigations on the multipolar and higher-order lattice light *** Cd atom has been proposed as a new candidate for the development of a lattice clock because of its smaller blackbody radiation shift at room ***,we apply an improved combined method of the Dirac-Fock plus core polarization and relativistic configuration interaction methods to calculate the dynamic multipolar polarizabilities of the Cd clock *** effects of the high-order core-polarization potentials on the energies,reduced matrix elements,and multipolar polarizabilities have been evaluated *** detailed comparison with available literature demonstrates that taking into account of the high-order core-polarization potentials is a simple and effective approach to improve the results of atomic properties for heavy atoms.

关键词： Cd atomic clock multipolar polarizabilities high-order core-polarization potentials DFCP+RCI method

Is there a correlation between the outcome of transurethral resection of prostate and preoperative degree of bladder outlet obstruction？

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Asian Journal of Andrology 2012年第4期14卷 556-559页

作者： mi mi Oh Jin Wook Kim Je long Kim Du Geon Moon Department of Urology Korea University Medical Center Seou1435-766 Korea Department of Urology Korea University Medical Center and Korea University Institute of Regenerative Medicine Seeu1435-766 Korea

To compare the impact of transurethral resection of prostate （TURP） on symptom scores and maximal flow rates （Qmax） in patients with equivocal bladder outlet obstruction （bOO） and definite bOO and to assess the relationship between the surgical outcomes and degree of preoperative bOO, we prospectively evaluated men with lower urinary tract symptoms and bladder outlet obstruction index （bOO1） greater than 20, who were refractory to conventional medical treatment and underwent TURP. Urodynamic evaluation, International Prostate Symptom Score （IPSS）, uroflowmetry, post-void residual volume （PVR） check and transrectal ultrasound were performed. 20〈b001〈40 was defined as equivocal bOO and bOO1 〉~40 as definite bOO. Changes of IPSS, Qmax, PVR and correlation analysis was performed between the degree of improvement of Qmax, subdomains of I PSS and bOO1. Fifty-four patients showed equivocal bOO and 80 patients showed definite bOO. Preoperatively equivocal bOO group and definite bOO group showed significant differences in maximal bladder capacity and prevalence of detrusor overactivity, whereas no difference was noted in prostate volume. Postoperatively both groups showed improvements in Qmax, obstructive （IPSSO） and irritative （IPSSI） subdomain of IPSS, but the degree of improvement in Qmax and IPSSI subdomain was statistically significantly greater in definite bOO group. The degree of improvement of Qmax and IPSSI showed weak correlation with preoperative bOO1. As a weak correlation was identified between preoperative degree of bOO and outcome of TURP, other factors other than bOO1 such as severity of patients＇ symptoms should be considered in deciding treatment modality.

关键词： bladder outlet obstruction bladder outlet obstruction index International Prostate Symptom Scores

Intraband Dynamics and Terahertz Emission in biased GaAs/In_(0.53)Ga_(0.47)As Semiconductor Superlattices

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Communications in Theoretical Physics 2009年第12期52卷 1134-1138页

作者： LI min mi Xian-Wu College of Physics Science and Information Engineering Jishou University Jishou 416000 China

Using an excitonic basis, we investigate the intraband polarization, optical absorption spectra, and terahertzemission of semiconductor superlattice with the density matrix theory. The excitonic bloch oscillation is driven by thedc and ac electric fields. The slow variation in the intraband polarization depends on the ac electric field frequency. Theintraband polarization increases when the ac electric field frequency is below the bloch frequency. When the ac electricfield frequency is above the bloch frequency, the intraband polarization downwards and its intensity decreases. Thesatellite structures in the optical absorption spectra are presented. Due to excitonic dynamic localization, the emissionlines of terahertz shift in different ac electric field and dc electric field.

关键词： semiconductor superlattices terahertz optical spectra excitons

Initial assessment of single-and dual-frequency bDS-3 RTK positioning

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Satellite Navigation 2020年第1期1卷 338-344页

作者： Yunbin Yuan Xiaolong mi baocheng Zhang State Key Laboratory of Geodesy and Earth’s Dynamics Innovation Academy for Precision Measurement Science and TechnologyChinese Academy of Sci-encesWuhanChina University of Chinese Academy of Sciences BeijingChina

The beiDou navigation satellite system with global coverage(bDS-3)has been fully operational since July 2020 and provides comprehensive services to global ***-3 transmits several new navigational signals based on the signals inherited from the beiDou navigation satellite(regional)system(bDS-2).Previous studies focused on the positioning performance of bDS-2 plus bDS-3 and that of combining bDS-3 and other Global Navigation Satellite Systems(GNSSs),but there was no in-depth discussion on the positioning performance of the *** this contribution,the bDS-3-only Real-Time Kinematic(RTK)positioning is analysed using the data collected in zero and short baselines in Wuhan,*** RTK model based on Single-Differenced is first presented,and the bDS-3-only RTK positioning in cases of single and dual-frequencies is evaluated with the model in terms of the empirical integer ambiguity resolution success rates and positioning *** numerical tests suggest two major ***,the positioning performance for the b1I and b3I retained from bDS-2 and the new frequency b1C is comparable,while that for the new frequency b2a is ***,the positioning performance of the new frequency combination of the b1C+b2a is not as good as that of the b1C only,owing to the unrealistic stochastic model used.

关键词： bDS-3 Global navigation satellite system Real-time kinematic Integer ambiguity resolution Stochastic model

Myanmarorchestia victoria sp. nov.(Crustacea, Amphipoda, Talitridae), a new species of landhopper from the high altitude forests in Myanmar

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Zoological Research 2017年第5期38卷 281-290页

作者： Ya-mi Zheng Zhong-E Hou Key Laboratory of Zoological Systematics and Evolution Institute of Zoology Chinese Academy of Sciences Southeast Asia biodiversity Research Institute Chinese Academy of Sciences

Myanmarorchestia victoria sp. nov. is described from high altitude habitats in Myanmar. The new species differs morphologically from its congeners by palp of maxilliped narrow; sexually dimorphic gnathopod II, propodus of male chelate and propodus of female mitten-shaped; and dimorphic uropod II, outer ramus of male with small teeth distally, outer ramus of female with three distal spines. Analysis of DNA barcode sequences and niche distinctiveness support recognition of the new species

关键词： Taxonomy Mt. Victoria COl gene Leaflitter Morphology New species

Preconditioning process for dermal tissue decellularization using electroporation with sonication

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Regenerative biomaterials 2022年第1期9卷 22-29页

作者： mi Hee Leeand Jong-Chul Park min-Ah Koo HaKyeong Jeong Seung Hee Hong Gyeung mi Seon mi Hee Lee Jong-Chul Park Cellbiocontrol Laboratory Yonsei University College of Medicine50-1 Yonsei-roSeodaemun-guSeoul 03722Republic of Korea Department of Medical Engineering Graduate School of Medical ScienceBrain Korea 21 ProjectYonsei University College of Medicine50-1 Yonsei-roSeodaemun-guSeoul 03722Republic of Korea

Decellularization to produce bioscaffolds composed of the extracellular matrix(ECM)uses enzymatic,chemical and physical methods to remove antigens and cellular components from *** decellularization methods depend on the characteristics of tissues,and in particular,tissues with dense,complex structure and abundant lipid content are difficult to completely *** study enables future research on the development of methods and treatments for fabricating bioscaffolds via decellularization of complex and rigid skin tissues,which are not commonly considered for decellularization to date as their structural and functional characteristics could not be preserved after severe *** this study,decellularization of human dermal tissue was done by a combination of both chemical(0.05%trypsin-EDTA,2%SDS and 1%Triton X-100)and physical methods(electroporation and sonication).After decellularization,the content of DNA remaining in the tissue was quantitatively confirmed,and the structural change of the tissue and the retention and distribution of ECM components were evaluated through histological and histochemical analysis,*** of the chemical pretreatment that increase the efficiency of physical stimulation as well as decellularization,and conditions for electroporation and sonication without the use of detergents,unlike the methods performed in previous studies,were established to enable the complete decellularization of the skin *** combinatorial decellularization treatment formed micropores in the lipid bilayers of the skin tissues while removing all cell and cellular residues without affecting the ECM ***,this procedure can be widely used to fabricate bioscaffolds by decellularizing biological tissues with dense and complex structures.

关键词： decellularization electroporation sonication extracellular matrix

Reoxidation process and corrosion behavior of TA15 alloy by laser ablation

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Rare Metals 2021年第4期40卷 865-876页

作者： bo-Wen Liu Gao-Yang mi Chun-ming Wang School of Materials Science and Engineering Huazhong University of Science and TechnologyWuhan 430074China

The thermal oxide layer formed of TA15 alloy has poor corrosion *** this paper,the changes of the elements and components on the surface after laser ablation with different energy densities(E) were *** formation process and corrosion behavior of laser-generated oxide layer were *** E increases,the oxygen content decreases from 8.52% to 5.43% and then increases to 11.89%.The surface oxide layer changes from TiO_(2)(R)(i.e.,rutile) to Ti_(2) O_(3)+TiO_(2)(R) and finally becomes TiO_(2)(R)+TiO_(2)(A)(i.e.,anatase).The TiO_(2)(R) gasification was confirmed by calculating the surface temperature *** surface reoxidation process was illustrated by a thermodynamically calculated ΔGT(i.e.,the Gibbs free energy changes with temperature).When E≥17.5 J·cm^(-2),the oxide layer exhibits an agitated morphology,and oxide falls off at the *** E increases,the corrosion rate decreases first and then *** energy density of 8.75 J·cm^(-2),the surface corrosion rate was 20.43 times slower than that of the untreated *** impedance spectrum and equivalent resistance results also prove the best corrosion resistance at 8.75 J·cm^(-2).The corrosion behavior of the oxide layer is analyzed from the properties of the oxide layer components and the reaction products with the electrolyte.

关键词： Laser ablation TA15 alloy Reoxidation process Corrosion behavior Elemental analysis

burden of nonalcoholic fatty liver disease and advanced fibrosis in a Texas Hispanic community cohort

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World Journal of Hepatology 2015年第11期7卷 1586-1594页

作者： Jen-Jung Pan Susan P Fisher-Hoch Chaoru Chen Ariel E Feldstein Joseph b Mc Cormick Mohammad H Rahbar Laura beretta mi.hael b fallon Division of Gastroenterology Hepatology and Nutrition Department of Internal Medicine the University of Texas Health Science Center at Houston School of Public Health brownsville Campus the University of Texas Health Science Center at Houston Division of Gastroenterology Hepatology and Nutrition Department of Pediatrics University of California at San Diego Division of Clinical and Translational Sciences Department of Internal Medicine the University of Texas Health Science Center at Houston Division of Epidemiology Human Genetics and Environmental Sciences School of Public Health the University of Texas Health Science Center at Houston Department of Molecular and Cellular Oncology the University of Texas MD Anderson Cancer Center

AIM: To investigate the potential burden of nonalcoholic steatohepatitis(NASH) and advanced fibrosis in a hispanic ***: Four hundred and forty two participants with available ultrasonography data from the Cameron County Hispanic Cohort were included in this study. Each participant completed a comprehensive questionnaire regarding basic demographic information, medical history, medication use, and social and family history including alcohol use. Values of the nonalcoholic fatty liver disease fibrosis score(NFS), FIb4 index, bARD score, and Aspartate aminotransferase to Platelet Ratio Index(APRI) were computed using the blood samples collected within 6 mo of liver ultrasonography from each participant. Hepatic steatosis was determined by ultrasonography. As part of univariable analysis, for continuous variables, comparisons among groups were performed with student-t test, one way analysis of variance, and Mann-Whitney test. Pearson χ2 and the Fisher exact test are used to assess differences in categorical variables. For multivariable analyses, logistic regression analyses were performed to identify characteristics associated with hepatic steatosis. All reported P values are based two-sided tests, and a P value of less than 0.05 was considered to indicate statistical ***: The mean age and body mass index(bmi) of the study participants were 49.1 years and 31.3 kg/m2, respectively. Among them, 65.6% were females, 52% had hepatic steatosis, 49.5% had metabolic syndrome, and 29% had elevated aminotransferases. based on established cut-offs for diagnostic panels, between 17%-63% of the entire cohort was predicted to have NASH with indeterminate or advanced fibrosis. Participants with hepatic steatosis had significantly higher bmi(32.9 ± 5.6 kg/m2 vs 29.6 ± 6.1 kg/m2, P minotransferase(38.7% vs 18.9%, P bolic syndrome(6

关键词： Noninvasive biomarkers Nonalcoholic fattyliver disease Hispanics Ultrasonography Liver fibrosis

Reduction of Sensitivity to Sintering Temperature for Nd-Fe-b Magnets through Zr and Nb Additions

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Journal of Materials Science & Technology 2009年第5期25卷 629-632页

作者： mi Yan Xigui Cui Lianqing Yu Tianyu Ma State Key Laboratory of Silicon Materials Department of Materials Science and Engineering Zhejiang University Hangzhou 310027 China

To reduce the sensitivity of grain growth to sintering temperature for improving property consistency of sintered Nd-Fe-b magnets, combined additions of Zr and Nb were investigated. It was found that when Zr content was increased to 0.07 at. pct, abnormal grain growth was effectively hindered even when the sintering temperature reached 1100℃. With combined additions of 0.07 at. pct Zr and 0.07 at. pct Nb, the sensitivity of grain growth to sintering temperature was greatly reduced consistency than the magnets containing no Zr and also improved. The magnets sintered at 1100℃ showed higher property Nb. In addition, the magnetic properties of magnets were also improved.

关键词： Sintered Nd-Fe-b magnet Magnetic properties Consistency Sintering temperature