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Current Medical Science 2020年第4期40卷 767-772页

作者： Yi-hua LIN Jing-xin YE Ze-xuan WU Yun CHEN Xi XIA Wei-ping qian Department of Reproductive Center Peking University Shenzhen HospitalShenzhen 518036China Department of Ultrasound Peking University Shenzhen HospitalShenzhen 518036China

Summary:The optimal assisted reproductive treatment strategy for infertile women with unilateral tubal obstruction remains *** investigate the role of intrauterine insemination(IUI)in the treatment of infertile women with unilateral tubal occlusion,the data of 148 couples were retrospectively collected and ***-eight infertile women with unilateral occlusion diagnosed by hysterosalpingography(HSG)were categorized as the study group and 70 others with unexplained infertility as the control *** study group was divided into a proximal occlusion subgroup and a mid-distal occlusion subgroup for further *** main outcomes,namely the clinical pregnancy rate(CPR),ongoing pregnancy rate(OPR),and live birth rate(LBR)per cycle,were *** results showed a tendency of lower CPR,OPR,and LBR in the study group than in the control group,without statistical *** investigations revealed that the unilateral proximal occlusion subgroup had similar CPR,OPR,and LBR as the control group,while the unilateral mid-distal occlusion subgroup had significantly lower CPR(5.1%vs.20.0%,P=0.035),OPR(5.1%vs.20.0%,P=0.035),and LBR(5.1%vs.20.0%,P=0.035)than the control *** conclusion,the clinical outcomes of IUI were worse in patients with unilateral tubal occlusion than in those with unexplained *** might be primarily caused by the worse outcome of patients with unilateral mid-distal tubal occlusion instead of proximal occlusion.

关键词： hysterosalpingography intrauterine insemination unilateral tubal factor infertility

MRI and diffusion tensor imaging in assessing correlation of activation of cortical motor function and manifestations of corticospinal tract with muscle strength in patients with ischemic stroke

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Neural Regeneration Research 2006年第1期1卷 56-59页

作者： Ziqian Chen Hui Xiao Biyun Zhang Gennian qian ping Ni Xizhang Yang Department of Medical Imaging Fuzhou General Hospital of Nanjing Military Area Command of Chinese PLA Fuzhou 350025Fujian Province China

BACKGROUND： Ischemic stroke is often followed by the abnormalities of neurons and corticospinal tract, which can lead to corresponding clinical symptoms and signs. Recently, with the continuous perfection of high-field MRI instrument, it becomes possible to assess and investigate the cortical function and structural reconstruction following stroke by using MRI and diffusion tensor imaging （DTI）. OBJECTIVE： To observe the cortical motor function and changes of corticospinal tracts by using MRI and DTI in the patients with ischemic stroke at acute period, compare with the normal subjects, and assess the damage of corticospinal tract and muscle strength.DESIGN ： A case-control observation.SETTING： Department of Medical Imaging, Fuzhou General Hospital of Nanjing Military Area Command of Chinese PLA. PARTICIPANTS ： Nine inpatients （5 males and 4 females） with injury of motor function induced by acute ischemic stroke were selected from Fuzhou General Hospital of Nanjing Military Area Command of Chinese PLA between August and December in 2005, they aged 16-87 years with an average of 51 years old, and those with obvious conscious disturbances and severe cognitive disorders were excluded. At the same time, nine healthy right-handed physical examinees matched by age and gender with the patients were also selected, and they all had no nervous disease, epilepsy, mental diseases, cerebrovascular abnormalities and injury history, etc. All the subjects were informed with the detected items and agreed to participate in. METHODS： All the 9 patients with ischemic stroke at acute period and 9 healthy subjects were examined with MRI and DTI.① A block-based design was used in the MRI, the passive finger-to-finger exercise was used as the stimulative task, and the static condition was taken as the baseline task. The GE 1.5T MRI system was used, all the data were processed after off-line, and analyzed with the SPM2 software, the association between the activated area and local

关键词： cortical tensor assessing cortex rehabilitation handed exercise epilepsy atter interrupted

Theoretical investigation of Ag_n@（ZnS）42（n=6-16） using first principles:Structural, electronic and optical properties

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Progress in Natural Science:Materials International 2019年第5期29卷 525-532页

作者： Qing Liu Hanyue Zhao Xiaoxu Wang Jinrong Huo Lu Li Panpan Gao ping qian Yanjing Su Nanxian Chen Beijing Advanced Innovation Center for Materials Genome Engineering University of Science and Technology Beijing Department of Physics University of Science and Technology Beijing Corrosion and Protection Center Key Laboratory for Environmental Fracture (MOE) University of Science and Technology Beijing Department of Physics Tsinghua University

Ag@ZnS nanoparticles display enhanced photocatalytic efficiency and good photoelectric properties compared to their single-component counterparts in the process of forming a core-shell structure using an Ag cluster as the inner core of a ZnS outer *** this study,first-principles calculations were used to investigate the structural,electronic,and optical properties of Ag_n@（ZnS）42（n=6-16）core-shell *** calculated results show significant even-odd oscillations in the structural stability,that is,Ag@ZnS nanostructures with an even number of Ag_n core atoms are relatively more stable than those with an odd number of core *** secondorder differences in the total energies（Δ2E）and the core-shell interaction energy Ecsindicate that a Ag12@（ZnS）42nanostructure is the most stable configuration.A significant red shift was found in Ag_n@（ZnS）42nanoparticles in the absorption spectrum compared with a（ZnS）48nanostructure,which is likely attributed to the strong electron interactions between the Ag core and the ZnS shell.

关键词： Core-shell structure DFT Optical properties Red shift phenomenon Electronic structure

Influence of composition and size on the thermodynamic stability and structural evolution of CuAlNi nanoclusters

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Progress in Natural Science:Materials International 2020年第4期30卷 477-484页

作者： Qing Liu Ye Su Keke Song Xiaoxu Wang Panpan Gao Chutian Wang Yuqin Xiao Xiaodong Jian ping qian Beijing Advanced Innovation Center for Materials Genome Engineering Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interfere Science School of Mathematics and Physics University of Science and Technology Beijing National Supercomputer Center in Tianjin

The heating process for CuAlNi nanoclusters with cuboctahedral structure was studied by molecular dynamics simulation with the embedded atom method. A diffusionless martensitic transformation from the cuboctahedral(CO) to the icosahedral(ICO) structure before the melting point was found in some CuAlNi nanoclusters. The effects of element composition and cluster size on the thermodynamic stability and structural transformation of trimetallic nanoclusters were investigated. The results show that the CO–ICO transformation temperature was size-dependent and occurred only for small clusters. It was also observed that the CO–ICO transformation temperature firstly dropped and then raised as Al concentration increased, which may be strongly related to the release of excess energy. Furthermore, the surface segregation phenomenon was also observed that the lower surface energy components, such as Al and Cu atoms, segregated to the surface of CuAlNi nanoclusters. The changes in the melting points of Cu Al Ni nanoclusters with different alloy compositions and cluster sizes were also studied. And furthermore, the physical basis of structural transition of CuAlNi nanoclusters was discussed.

关键词： MD simulation Structural transformation Thermodynamic stability Alloy nanocluster Size effect

Degradation of Furfural by UV/O_3 Technology

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Chemical Research in Chinese Universities 2009年第4期25卷 451-454页

作者： KANG Chun-li TANG Xiao-jian JIAO Xin-qian GUO ping QUAN Fu-min LIN Xue-yu College of Environment and Resources Jilin University Changchun 130021 P. R. China

Furfural in aqueous solution was treated by UV/O3 *** results show that the removal rate of furfural is severely enhanced and the synergism phenomenon appears when ultraviolet and ozone are present *** influences of experimental parameters such as pH,the intensity of light and the negative-positive ions on furfural degradation were *** results indicate that furfural（300 mg/L） is almost completely degraded after 3 h under the optimum *** intermediate in the furfural degradation was characterized by GC-MS and IR spectrum and the degradation mechanism of furfural by UV/O3 technology was proposed.

关键词： Ozone Ultraviolet (UV) Furfural Degradation

Clinical characteristics of two cohorts of infantile spasms: response to pyridoxine or topiramate monotherapy

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World Journal of Pediatrics 2018年第3期14卷 290-297页

作者： Jiao Xue ping qian Hui Li Ye Wu Hui Xiong Yue-Hua Zhang Zhi-Xian Yang Department of Pediatrics Peking University First HospitalNo.1Xi'anmen StreetXicheng DistrictBeijing 100034China

Background Infantile spasms (IS) was an epileptic disease with varied treatment widely among clinicians. Here, we aimed to compare and analyze the clinical characteristics of IS response to pyridoxine or topiramate monotherapy (TPM control IS). Methods The clinical manifestations, treatment processes and outcomes were analyzed in 11 pyridoxine responsive IS and 17 TPM-control IS. Results Of the 11 patients with pyridoxine responsive IS, nine were cryptogenic/idiopathic. Age of seizure onset was 5.36 ± 1.48 months. Spasms were controlled within a week in most of the patients. At the last follow-up, EEG returned to normal in 8. Psychomotor development was normal in 6, mild delay in 3, severe delay in 2. Of the 17 patients with TPM-control IS, 10 were cryptogenic/idiopathic. The age of seizure onset was 5.58 ± 2.09 months. All patients were controlled within a month. At the last follow-up, EEG was normal in 10. Psychomotor development was normal in 8, mild delay in 5, severe delay in 4. Genetic analysis did not show any meaningful results. Conclusions The clinical characteristics and disease courses of pyridoxine responsive IS and TPM-control IS were similar, which possibly clued for a same pathogenic mechanism. Pyridoxine should be tried first in all IS patients, even in sympto-matic cases. If patients were not responsive to pyridoxine, TPM could be tried.

关键词： Infantile spasms Pyridoxine Topiramate

Effectiveness of Combined Testosterone Undecanoate with Tamoxifen Citrate Treatment in Men with Idiopathic Azoospermia or Serious Oligozoospermia

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Journal of Reproduction and Contraception 2012年第4期23卷 254-258页

作者： Bo SONG Wei-ping qian Guangdong Key Lab. Male Reproductive Medicine & Genetics Reproductive Medicine Department Shenzhen Hospital Peking University

Objective To assess the effect of treatment with a combination of the tamoxifen citrate and testosterone undecanoate on sperm variables in men with idiopathic azoospermia or oIigozoospermia. Methods Four men with idiopathic azoospermia and 8 men with idiopathic oligozoospermia were collected in this retrospective and self control trial. All patients were treated with testosterone undecanoate of 80 mg/d and tamoxifen citrate of 20 mg/d. Sperm characteristics and pregnancy incidence were measured every month during 4 months medication. Results Tamoxifen citrate plus testosterone undecanoate treatment produced a satisfactory improvement of total sperm number, motility after 2 and 3 months whereas serum FSH, LH levels increased after 2 or 3 months. Conclusion The combination of tamoxifen citrate with testosterone undecanoate could improve significantly sperm count. The combination could be used in men with idiopathic azoospermia or serious oligozoospermia.

关键词： testosterone tamoxifen citrate oligozoospermia azoospermia

Cross - equatorial flow and its effects on the hurricanes occurrence over the Southern Hemisphere

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Acta Oceanologica Sinica 1989年第2期8卷 307-313页

作者： qian ping and Wang JingyiNational Marine Environmental Forecasting Center, Beijing, China

Channels of cross - equatorial flow and their characteristics Winds at every 5 deg. grid point from 30°E to 180° over the equator at 850 hPa and 200hPa from December 1984 to February 1985 have been separated into U(zonal wind) andV(meridional wind).The V component has been used to represent cross- equatorial flow. FromFig. 1 we obtained that as during the Northern summer,there are also severa1 regions in which

关键词： over Cross equatorial flow and its effects on the hurricanes occurrence over the Southern Hemisphere flow

Tolman length of simple droplet: Theoretical study and molecular dynamics simulation

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Chinese Physics B 2021年第1期30卷 443-448页

作者： Shu-Wen Cui Jiu-An Wei qiang Li Wei-Wei Liu ping qian Xiao Song Wang Department of Physics and Information Engineering Cangzhou Normal UniversityCangzhou 061001China State Key Laboratory of Nonlinear Mechanics(LNM)and Key Laboratory of Microgravity Institute of MechanicsChinese Academy of SciencesBeijing 100190China Silfex a Division of Lam Research950 South Franklin StreetEatonOhio 45320USA Department of Physics University of Science and Technology BeijingBeijing 100083China Institute of Mechanics and Power Engineering Henan Polytechnic UniversityJiaozuo 454003China

In 1949, Tolman found the relation between the surface tension and Tolman length, which determines the dimensional effect of the surface tension. Tolman length is the difference between the equimolar surface and the surface of tension. In recent years, the magnitude, expression, and sign of the Tolman length remain an open question. An incompressible and homogeneous liquid droplet model is proposed and the approximate expression and sign for Tolman length are derived in this paper. We obtain the relation between Tolman length and the radius of the surface of tension(R_(s)) and found that they increase with the Rs decreasing. The Tolman length of plane surface tends to zero. Taking argon for example, molecular dynamics simulation is carried out by using the Lennard–Jones(LJ) potential between atoms at a temperature of 90 K. Five simulated systems are used, with numbers of argon atoms being 10140, 10935, 11760, 13500, and 15360, respectively. By methods of theoretical study and molecular dynamics simulation, we find that the calculated value of Tolman length is more than zero, and it decreases as the size is increased among the whole size range. The value of surface tension increases with the radius of the surface of tension increasing, which is consistent with Tolman’s theory. These conclusions are significant for studying the size dependence of the surface tension.

关键词： Tolman length surface tension radius of surface of tension radius of equimolecular surface molecular dynamics simulation

1,3,5-三硝基苯在高岭石表面吸附的理论研究

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高等学校化学学报 2013年第11期34卷 2601-2608页

作者：王幸钱萍山东农业大学化学与材料科学学院泰安271018

构造了高岭石硅氧层和铝氧层的团簇模型(分别为Si13O37H22和Al6O24H30),并分别在B3LYP/6-31G(d),MP2/6-31G(d)//B3LYP/6-31G(d)和B3LYP/6-311++G(d,p)//B3LYP/6-31G(d)理论水平上对1,3,5-三硝基苯(TNB)在高岭石表面的吸附性质(如优化的几何构型、结构参数、吸附能、振动频率、静电势和分子轨道等)进行了研究.结果表明,TNB和硅氧层表面间的相互作用以静电和范德华相互作用为主;TNB与铝氧层间的相互作用以氢键为主,且TNB和铝氧层间相互作用的能量更低,结构更稳定.

关键词： 1,3,5 三硝基苯(TNB) 高岭石吸附氢键分子轨道