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The effect of s-wave scattering length on self-trapping and tunneling phenomena of Fermi gases in one-dimensional accelerating optical lattices

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Chinese Physics B 2015年第4期24卷 76-81页

作者：贾伟豆福全孙建安段文山 College of Physics and Electronic Engineering and Joint Laboratory of Atomic and Molecular Physics of NWNU & IMP CAS Northwest Normal University College of Physics and Electronic Engineering Northwest Normal University

We investigate the tunneling dynamics of the Fermi gases in an optical lattice in the Bose--Einstein condensation （BEC） regime. The three critical scattering lengths and the system energies are found in different cases of Josephson oscillation （JO）, oscillating-phase-type self-trapping （OPTST）, running-phase-type self-trapping （RPTST）, and self-trapping （ST）. It is found that the s-wave scattering lengths have a crucial role on the tunneling dynamics. By adjusting the scattering length in the adiabatic condition, the transition probability changes with the adiabatic periodicity and a rectangular periodic pattern emerges. The periodicity of the rectangular wave depends on the system parameters such as the periodicity of the adjustable parameter, the s-wave scattering length.

关键词： self-trapping and tunneling phenomenon Fermi gas one-dimensional accelerating optical lattices

基于点特异度和自适应分类策略的眼底图像分割方法

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通信学报 2015年第8期36卷 161-170页

作者：姜平窦全胜山东省高校智能信息处理重点实验室山东烟台264005 山东工商学院计算机科学与技术学院山东烟台264005

提出基于点特异度和自适应分类策略的血管分割方法(SSVD,specificity and self-adaptive vessel detection),首先给出点特异度的定义,通过设置高点特异度阈值,实现主血管的提取,然后由多主体进行自适应像素分类,将每个未确定像素作为一... 详细信息

提出基于点特异度和自适应分类策略的血管分割方法(SSVD,specificity and self-adaptive vessel detection),首先给出点特异度的定义,通过设置高点特异度阈值,实现主血管的提取,然后由多主体进行自适应像素分类,将每个未确定像素作为一个Agent,在多尺度点特异度阈值范围内,根据邻域Agent状态修订自身状态,逐步完成对像素的分类,最后通过多窗口去噪对噪音进行滤除完成对图像血管结构的分割。将SSVD方法应用到DRIVE数据库眼底图像的血管分割中,实验结果表明该方法要比现有其他方法具有更高的准确度和效率。

关键词：点特异度自适应分类策略多尺度阈值多窗口去噪

A chromosome-scale genome assembly of a diploid alfalfa,the progenitor of autotetraploid alfalfa

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Horticulture Research 2020年第1期7卷 82-93页

作者： Ao Li Ai Liu Xin Du Jin-Yuan Chen Mou Yin Hong-Yin Hu Nawal Shrestha Sheng-Dan Wu Hai-Qing Wang quan-Wen dou Zhi-Peng Liu Jian-quan Liu Yong-Zhi Yang Guang-Peng Ren State Key Laboratory of Grassland Agro-Ecosystems Institute of Innovation Ecology&School of Life SciencesLanzhou UniversityLanzhouChina Key Laboratory of Adaptation and Evolution of Plateau Biota Northwest Institute of Plateau BiologyChinese Academy of SciencesXiningChina State Key Laboratory of Grassland Agro-Ecosystems Key Laboratory of Grassland Livestock Industry InnovationMinistry of Agriculture and Rural AffairsCollege of Pastoral Agriculture Science and TechnologyLanzhou UniversityLanzhouChina Key Laboratory of Bio-Resources and Eco-Environment of the Ministry of Education&State Key Lab of Hydraulics&Mountain River Engineering College of Life SciencesSichuan UniversityChengduChina

Alfalfa(Medicago sativa L.)is one of the most important and widely cultivated forage *** is commonly used as a vegetable and medicinal herb because of its excellent nutritional quality and significant economic *** on Illumina,Nanopore and Hi-C data,we assembled a chromosome-scale assembly of Medicago sativa ***(voucher PI464715),the direct diploid progenitor of autotetraploid *** assembled genome comprises 793.2 Mb of genomic sequence and 47,202 annotated protein-coding *** contig N50 length is 3.86 *** genome is almost twofold larger and contains more annotated protein-coding genes than that of its close relative,Medicago truncatula(420 Mb and 44,623 genes).The more expanded gene families compared with those in *** and the expansion of repetitive elements rather than whole-genome duplication(i.e.,the two species share the ancestral Papilionoideae whole-genome duplication event)may have contributed to the large genome size of *** *** and evolutionary analyses revealed that *** *** diverged from ***~5.2 million years ago,and the chromosomal fissions and fusions detected between the two genomes occurred during the divergence of the two *** addition,we identified 489 resistance(R)genes and 82 and 85 candidate genes involved in the lignin and cellulose biosynthesis pathways,*** near-complete and accurate diploid alfalfa reference genome obtained herein serves as an important complement to the recently assembled autotetraploid alfalfa genome and will provide valuable genomic resources for investigating the genomic architecture of autotetraploid alfalfa as well as for improving breeding strategies in alfalfa.

关键词： breeding cultivated alfalfa

Improved mechanical properties and strengthening mechanism with the altered precipitate orientation in magnesium alloys

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Journal of Magnesium and Alloys 2022年第5期10卷 1256-1267页

作者： Y.J.Wan Y.Zeng Y.C.dou D.C.Hu X.Y.Qian Q.Zeng K.X.Sun G.F.quan Key Laboratory of Advanced Technologies of Materials Ministry of EducationSchool of Material Science and EngineeringSouthwest Jiaotong UniversityChengdu 610031China College of Materials Science and Engineering Sichuan University of Science and EngineeringZigong 643000China department of Materials The University of ManchesterOxford RoadManchester M139PLUnited Kingdom

Aging prior to twinning deformation was proposed to alter the precipitate orientation of the plate-shapedβ-MgAlfrom(0002)basal planes(named basal plates)to■prismatic planes(named prismatic plates)in AZ31 Mg *** experimental results showed that the compressive yield strength(CYS)of the sample containing prismatic plates increased 40 MPa and the compression ratio raised by 22%compared to that containing basal *** underlying strengthening mechanism was analyzed via a yield strengthen(YS)model with a function of grain size,precipitate characters(size,oritention,fraction)and Schmid factor(SF).It revealed that the improvement of CYS was mainly attributed to the altered precipitate orientation and refined grain size produced by twinning ***,the prismatic plates always have a stronger hardening effect on basal slip than basal plates under the same varites of precipitate diameter and ***,the decreased CRSS ratio of prismatic slip to basal slip revealed that the activity of non-basal slip in Mg alloy might be *** activated slip systems provided more mobile dislocations,contributing to the large compression ratio of the Mg rolled sheet with prismatic plates.

关键词： Precipitate orientation Precipitation strengthening Grain boundary strengthening Yield strength model

Diffuse large B cell lymphoma with bilateral adrenal and hypothalamic involvement: A case report and literature review

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World Journal of Clinical Cases 2019年第23期7卷 4075-4083页

作者： Ping An Kang Chen Guo-Qing Yang Jing-Tao dou Yu-Long Chen Xin-Ye Jin Xian-Ling Wang Yi-Ming Mu quan-Shun Wang department of Endocrinology Chinese PLA General HospitalBeijing 100853China department of Hematology Chinese PLA General HospitalBeijing 100853China

BACKGROUND Non-Hodgkin’s lymphoma(NHL)can involve extralymphatic organs,resulting in diverse clinical manifestations,especially if the endocrine organs are *** type of involvement can often be difficult to detect *** now,no patients with NHL and concomitant bilateral adrenal and hypothalamic involvement have been *** purpose of this article is to discuss the diagnosis and treatment of lymphoma with bilateral adrenal gland and hypothalamic involvement so as to help physicians avoid misdiagnosis and missed *** SUMMARY We describe a case of a 52-years-old male patient with bilateral adrenal masses,who presented with a fever of unknown origin on ***,hypopituitarism of the anterior pituitary followed by posterior pituitary developed.18fluorine-fluorodeoxyglucose positron emission tomography/computed tomography(PET/CT)showed lesions with a high metabolism in both adrenal glands,hypothalamus,left supraclavicular lymph nodes,and other *** etiological diagnosis was determined based on a left supraclavicular lymph node *** patient,who eventually present with panhypopituitarism,was finally diagnosed with diffuse large B cell lymphoma with bilateral adrenal gland and hypothalamic *** immunochemotherapy,glucocorticoids administration and desmopressin acetate replacement therapy,the symptoms of fever and panhypopituitarism improved,and all the lesions reduced in *** This report demonstrates that,although synchronous involvement of two endocrine organs is rare in NHL,extra caution should be taken when dysfunction occurs in multiple endocrine organs.

关键词： Non-Hodgkin’s lymphoma Bilateral adrenal glands Hypothalamus Panhypopituitarism Case report

Optical Properties of Atomic defects in Hexagonal Boron Nitride Flakes under High Pressure

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Chinese Physics Letters 2020年第4期37卷 53-56页

作者： Xiao-Yu Zhao Jun-Hui Huang Zhi-Yao Zhuo Yong-Zhou Xue Kun Ding Xiu-Ming dou Jian Li Bao-quan Sun State Key Laboratory for Superlattices and Microstructures Institute of SemiconductorsChinese Academy of SciencesBeijing 100083 College of Materials Science and Optoelectronic Technology University of Chinese Academy of SciencesBeijing 100049

We investigate the pressure spectral characteristics and the effective tuning of defect emissions in hexagonal boron nitride(hBN) at low temperatures using a diamond anvil cell(DAC). It is found that the redshift rate of emission energy is up to 10 meV/GPa, demonstrating a controllable tuning of single photon emitters through *** on the distribution character of pressure coefficients as a function of wavelength, different kinds of atomic defect states should be responsible for the observed defect emissions.

关键词： defect hexagonal boron

Additional laparoscopic gastrectomy after noncurative endoscopic submucosal dissection for early gastric cancer: A single-center experience

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World Journal of Gastroenterology 2019年第29期25卷 3996-4006页

作者： Yan-Tao Tian Fu-Hai Ma Gui-Qi Wang Yue-Ming Zhang Li-Zhou dou Yi-Bin Xie Yu-Xin Zhong Ying-Tai Chen quan Xu Dong-Bing Zhao department of Pancreatic and Gastric Surgery National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital Chinese Academy of Medical Sciences and Peking Union Medical College Beijing 100021 China department of Endoscopy National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital Chinese Academy of Medical Sciences and Peking Union Medical College Beijing 100021 China

BACKGROUND The necessity of additional gastrectomy for early gastric cancer (EGC) patients who do not meet curative criteria after endoscopic submucosal dissection (ESD) is controversial. AIM To examine the clinicopathologic characteristics of patients who underwent additional laparoscopic gastrectomy after ESD and to determine the appropriate strategy for treating those after noncurative ESD. METHODS We retrospectively studied 45 patients with EGC who underwent additional laparoscopic gastrectomy after noncurative ESD from January 2013 to January 2019 at the Cancer Hospital of the Chinese Academy of Medical Sciences. We analyzed the patients’ clinicopathological data and identified the predictors of residual cancer (RC) and lymph node metastasis (LNM). RESULTS Surgical specimens showed RC in ten (22.2%) patients and LNM in five (11.1%).Multivariate analysis revealed that positive horizontal margin [odds ratio (OR)=13.393, 95% confidence interval (CI): 1.435-125, P=0.023] and neural invasion (OR=14.714, 95%CI: 1.087-199, P=0.043) were independent risk factors for RC. Undifferentiated type was an independent risk factor for LNM (OR=12.000, 95%CI: 1.197-120, P=0.035). Tumors in all patients with LNM showed submucosal invasion more than 500 μm. Postoperative complications after additional laparoscopic gastrectomy occurred in five (11.1%) patients, and no deaths occurred among patients with complications. CONCLUSION Gastrectomy is necessary not only for patients who have a positive margin after ESD, but also for cases with neural invasion, undifferentiated type, and submucosal invasion more than 500 μm. Laparoscopic gastrectomy is a safe, minimally invasive, and feasible procedure for additional surgery after noncurative ESD. However, further studies are needed to apply these results to clinical practice.

关键词： Early gastric cancer Endoscopic submucosal dissection Laparoscopic gastrectomy Residual cancer Lymph node metastasis

Non-concomitant cortical structural and functional alterations in sensorimotor areas following incomplete spinal cord injury

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Neural Regeneration Research 2017年第12期12卷 2059-2066页

作者： Yu Pan Wei-bei dou Yue-heng Wang Hui-wen Luo Yun-xiang Ge Shu-yu Yan quan Xu Yuan-yuan Tu Yan-qing Xiao Qiong Wu Zhuo-zhao Zheng Hong-liang Zhao department of Rehabilitation Beijing Tsinghua Changgung Hospital Beijing China School of Clinical Medicine Tsinghua University Beijing China department of Electronic Engineering Tsinghua University Beijing China department of Radiology Beijing Tsinghua Changgung Hospital Beijing China

Brain plasticity, including anatomical changes and functional reorganization, is the physiological basis of functional recovery after spinal cord injury（SCI）. The correlation between brain anatomical changes and functional reorganization after SCI is unclear. This study aimed to explore whether alterations of cortical structure and network function are concomitant in sensorimotor areas after incomplete SCI. Eighteen patients with incomplete SCI（mean age 40.94 ± 14.10 years old; male：female, 7：11） and 18 healthy subjects（37.33 ± 11.79 years old; male：female, 7：11） were studied by resting state functional magnetic resonance imaging. Gray matter volume（GMV） and functional connectivity were used to evaluate cortical structure and network function, respectively. There was no significant alteration of GMV in sensorimotor areas in patients with incomplete SCI compared with healthy subjects. Intra-hemispheric functional connectivity between left primary somatosensory cortex（BA1） and left primary motor cortex（BA4）, and left BA1 and left somatosensory association cortex（BA5） was decreased, as well as inter-hemispheric functional connectivity between left BA1 and right BA4, left BA1 and right BA5, and left BA4 and right BA5 in patients with SCI. Functional connectivity between both BA4 areas was also decreased. The decreased functional connectivity between the left BA1 and the right BA4 positively correlated with American Spinal Injury Association sensory score in SCI patients. The results indicate that alterations of cortical anatomical structure and network functional connectivity in sensorimotor areas were non-concomitant in patients with incomplete SCI, indicating the network functional changes in sensorimotor areas may not be dependent on anatomic structure. The strength of functional connectivity within sensorimotor areas could serve as a potential imaging biomarker for assessment and prediction of sensory function in patients with incomplete SCI. This trial was register

关键词： nerve regeneration incomplete spinal cord injury gray matter volume functional connectivity sensorimotor areas functionalmagnetic resonance imaging brain plasticity non-concomitant anatomical structure network imaging biomarker neural regeneration

锁模激光照射下InGaAs p-i-n管的负电压响应机理

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红外与毫米波学报 2015年第1期34卷 36-40页

作者：胡伟孙晓泉豆贤安电子工程学院脉冲功率与激光技术国家重点实验室安徽合肥230037

在考察InGaAs p-i-n管对锁模激光响应的实验中,发现其响应电压在经历一个快速的上升沿和缓慢的拖尾以后有一个明显的负电压.在二极管的线性响应阶段,负电压与正电压的峰值之比大约在0.18左右,且不随激光脉冲能量的增大而改变;在二极管... 详细信息

在考察InGaAs p-i-n管对锁模激光响应的实验中,发现其响应电压在经历一个快速的上升沿和缓慢的拖尾以后有一个明显的负电压.在二极管的线性响应阶段,负电压与正电压的峰值之比大约在0.18左右,且不随激光脉冲能量的增大而改变;在二极管的非线性响应阶段,随着光脉冲能量的增大,负电压逐渐变小最终消失.通过对p-in管的等效电路模型的建立以及对RLC振荡电路方程的求解,认为负电压的产生是由于二极管表现出了可观的电感特性,而负电压的消失是由于二极管的结电容随着光脉冲能量增大而增大的结果.该研究结果对InGaAs p-i-n管的设计和制造具有一定的理论指导作用.

关键词：锁模激光负电压等效电路电感结电容