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Field and Current Distribution in Superconducting Film Under Partial Field Penetration

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Chinese Physics Letters 1997年第9期14卷 701-704页

作者： XU Xiao-nong sun ai-min DING Shi-ying JIN Xin YAO Xi-xian YAN Shao-lin WEN Hai-hu Department of Physics and Center of Advanced Studies in Science and Technology of Microstructures Nanjing UniversityNanjing 210093 Department of Electronics Nankai UniversityTianjin 300071 National Labarmtory for Superconductivity Institute of PhysicsChinese Academy of SciencesBeijing 100080

Using finite-element analysis in a self-consistent way with the self-field of the current considered for superconducting thin film,the field and current distributions under partial field penetration are calculated based on the field dependent critical current density *** field penetrated depth is non-linear with the applied *** to the limited resolution of the vibrating sample magnetometer(VSM),the full penetrated field measured by VSM may be much smaller than its actual value.

关键词： field magnetometer vibrating

Congenital aortic arch anomalies: diagnosis using contrast enhanced magnetic resonance angiography

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Chinese Medical Journal 2005年第20期118卷 1751-1753页

作者： ZHU ming ZHONG Yu-min LI Yu-hua sun ai-min JIN Biao Department of Radiology Xinhua Hospital of Shanghai JiaotongUniversity Shanghai Children＇ s Medical Center Shanghai200127 China

Congenital aortic arch anomalies occur most commonly in children. The disease can be classified into three types： ① obstructive congenital abnormalities, including coarctation of aorta （CoA） and interruption of aortic arch （IAA）; ② nonobstructive congenital abnormalities, including double aortic arch and others; ③ congenital shunt abnormalities, including different types of patent ductus arteriosus （PDA）. Management of patients with congenital aortic arch anomalies relies on imaging. Routine imaging modalities, such as conventional X-ray plain film and transthoracic echocardiography （TTE）, have been recently complemented by magnetic resonance imaging （MRI）.

关键词： cardiac defect·congenital · magnetic resonance imaging · angiocardiography· aortic arch

Characteristics and efficacy of modified adenomyomectomy in the treatment of uterine adenomyoma

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Chinese Medical Journal 2011年第9期124卷 1322-1326页

作者： sun ai-jun LUO min WANG Wei CHEN Rong LANG Jing-he Department of Obstetrics and Gynecology Peking Union Medical College Hospital Peking Union Medical College Chinese Academy of Medical Sciences Beijing 100730 China

Background Adenomyoma is a very serious disease which influence the quality of life and leads to the infertility, and hysterectomy at the end. Unfortunetly, we still have no effective way to treat this kind of diseases. This study was aimed to evaluate the efficacy and surgical characteristics of modified adenomyomectomy. Methods This is a retrospective study and the subjects were collected in the past 5 years. We divided the subjects by the two different surgical procedures. Cases of adenomyoma patients who underwent conservative surgery, modified adenomyomectomy or wedge resection of the adenomyoma lesion were distributed to two groups retrospectively. Surgical characteristics, symptom relief, and recurrence were analysed in each group. Results General characteristics, including operation time, blood loss, and postoperative complication were similar in both groups. In the modified adenomyometomy group, the median follow-up time was 27.6 months and the rate of relief of dysmenorrhea and menorrhagia symptoms were 91.2% and 40.0%, respectively. In the wedge resection group, the rate of reliefe of dysmenorrhea and menorrhagia symptoms were 88.9% and 50.0%, respectively. Patients in both groups had statistically significant symptom relief, but there was no statistical difference between them. During the following time, ultrasonography relapse rate in modified modified adenomyomectomy group is significantly lower than the wedge resection group 15.0% vs. 69.2% （P 〈0.001）. The relapse rate, in terms of symptoms, was 5.0% in the modified adenomyomectomy group, which was similar to the relapse rate in the wedge resection group. In terms of reproductive outcome, 33.3% of the patients with infertility complications in the modified adenomyomectomy group became pregnant. Among them, the rate of pregnancy by assisted reproductive techniques was 45.5%, which was significantly higher than the rate of natural pregnancy, 23.1% （P =0.039）. Conclusion Modified adenomyomectomy appears

关键词： adenomyomectomy wedge resection adenomyoma lesion efficacy pregnancy relapse

OsPDR20 is an ABCG metal transporter regulating cadmium accumulation in rice

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Journal of Environmental Sciences 2024年第2期136卷 21-34页

作者： He Li Chao Li Di sun Zhi min Yang Department of Biochemistry and Molecular Biology College of Life SciencesNanjing Agricultural UniversityNanjing 210095China

Cadmium(Cd)is a non-essential toxic heavy metal,seriously posing high environmental risks to human *** genetic resources relevant to functional genes is important for understanding the metal absorption and accumulation in crops and bioremediation of Cd-polluted *** study investigated a functionally uncharacterized ATP binding cassette transporter G family(ABCG)gene encoding a Pleiotropic Drug Resistance 20(PDR20)type metal transporter which is localized to the plasma membrane of ***20 was transcriptionally expressed in almost all tissues and organs in lifespan and was strongly induced in roots and shoots of young rice under Cd *** expression of OsPDR20 in a yeast mutant ycf1 sensitive to Cd conferred cellular tolerance with less Cd *** of OsPDR20 by RNA interference(RNai)moderately attenuated root/shoot elongation and biomass,with reduced chlorophylls in rice grown under hydroponic medium with 2 and 10μmol/L Cd,but led to more Cd accumulation.A field trial of rice grown in a realistic Cd-contaminated soil(0.40 mg/kg)showed that RNai plants growth and development were also compromised compared to wild-type(WT),with smaller panicles and lower spikelet fertility but little effect on yield of ***,OsPDR20 suppression resulted in unexpectedly higher levels of Cd accumulation in rice straw including lower leaves and culm and *** results suggest that OsPDR20 is actively involved in Cd accumulation and homeostasis in rice *** increased Cd accumulation in the RNai plants has the potential application in phytoremediation of Cd-polluted wetland soils.

关键词： Rice ABCG transporter Cadmium accumulation Phytoremediation

Reconstructing historical forest fire risk in the non-satellite era using the improved forest fire danger index and long short-term memory deep learning-a case study in Sichuan Province,southwestern China

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Forest Ecosystems 2024年第1期11卷 87-99页

作者： Yuwen Peng Huiyi Su min sun mingshi Li Co-Innovation Center for Sustainable Forestry in Southern China Nanjing Forestry UniversityNanjing 210037China College of Forestry Nanjing Forestry UniversityNanjing 210037China

Historical forest fire risk databases are vital for evaluating the effectiveness of past forest management approaches,enhancing forest fire warnings and emergency response capabilities,and accurately budgeting potential carbon emissions resulting from ***,due to the unavailability of spatial information technology,such databases are extremely difficult to build reliably and completely in the non-satellite *** study presented an improved forest fire risk reconstruction framework that integrates a deep learning-based time series prediction model and spatial interpolation to address the challenge in Sichuan Province,southwestern ***,the forest fire danger index(FFDI)was improved by supplementing slope and aspect *** compared the performances of three time series models,namely,the autoregressive integrated moving average(ARIMA),Prophet and long short-term memory(LSTM)in predicting the modified forest fire danger index(MFFDI).The bestperforming model was used to retrace the MFFDI of individual stations from 1941 to *** this,the Anusplin spatial interpolation method was used to map the distributions of the MFFDI at five-year intervals,which were then subjected to weighted overlay with the distance-to-river layer to generate forest fire risk maps for reconstructing the forest fire danger *** results revealed LSTM as the most accurate in fitting and predicting the historical MFFDI,with a fitting determination coefficient(R^2)of 0.709,mean square error(MSE)of0.047,and validation R^2 and MSE of 0.508 and 0.11,*** validation of the predicted forest fire risk maps indicated that 5 out of 7 historical forest fire events were located in forest fire-prone areas,which is higher than the results determined from the original FFDI(2 out of 7).This proves the effectiveness of the improved MFFDI and indicates a high level of reliability of the historical forest fire risk reconstruction method proposed in this stu

关键词： Forest fire risk reconstruction MFFDI Time series models LSTM ARIMA Prophet Anusplin

Compliance motion control of the hydraulic dual-arm manipulator with adaptive mass estimation of unknown object

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Frontiers of Mechanical Engineering 2024年第1期19卷 35-52页

作者： Bolin sun min CHENG Ruqi DING Bing XU State Key Laboratory of Mechanical Transmissions Chongqing UniversityChongqing 400044China Key Laboratory of Conveyance and Equipment(ministry of Education) East China Jiaotong UniversityNanchang 330013China State Key Laboratory of Fluid Power and Mechatronic Systems Zhejiang UniversityHangzhou 310027China

Given the limited operating ability of a single robotic arm,dual-arm collaborative operations have become increasingly *** with the electrically driven dual-arm manipulator,due to the unknown heavy load,difficulty in measuring contact forces,and control complexity during the closed-chain object transportation task,the hydraulic dual-arm manipulator(HDM)faces more difficulty in accurately tracking the desired motion trajectory,which may cause object deformation or even *** overcome this problem,a compliance motion control method is proposed in this paper for the *** mass parameter of the unknown object is obtained by using an adaptive method based on velocity *** to the difficulty in obtaining the actual internal force of the object,the pressure signal from the pressure sensor of the hydraulic system is used to estimate the contact force at the end-effector(EE)of two hydraulic manipulators(HMs).Further,the estimated contact force is used to calculate the actual internal force on the ***,a compliance motion controller is designed for HDM closed-chain *** position and internal force errors of the object are reduced by the feedback of the position,velocity,and internal force errors of the object to achieve the effect of the compliance motion of the HDM,i.e.,to reduce the motion error and internal force of the *** required velocity and force at the EE of the two HMs,including the position and internal force errors of the object,are inputted into separate position *** addition,the position controllers of the two individual HMs are designed to enable precise motion control by using the virtual decomposition control ***,comparative experiments are carried out on a hydraulic dual-arm test *** proposed method is validated by the experimental results,which demonstrate improved object position accuracy and reduced internal force.

关键词： hydraulic dual-arm manipulator compliance motion control unknown object adaptive mass estimation nonlinear control

Highly Oriented HgBaCaCuO Superconducting Thin Films Prepared by Laser Ablation

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Chinese Physics Letters 1997年第7期14卷 546-548页

作者： YU Yang SHAO Hui-min ZENG Zhao-yang sun ai-min QIN Meng-jun REN Chong XU Xiao-nong DING Shi-ying JIN Xin YAO Xi-xian ZHOU Jun JI Zheng-ming YANG Sheng-zu ZHANG Wen-lan Department of Physics and Laboratory of Microstructure of Solid States Nanjing UniversityNanjing 210093 Department of Electronic Science and Engineering Nanjing UniversityNanjing 210093 State Key Laboratory of Metallogenesis Nanjing UniversityNanjing 210093

Pb-doped HgBa_(2)CaCu_(2)O_(y) films were prepared on the(100)SrTiO_(3) substrate by using laser ablation followed by post-Hg-vapor *** films are dominated by c-axis-oriented Hg-1212 phase as indicated by x-ray diffraction and electromagnetic *** transition temperature Tc0 is 110 *** critical current density Jc achieved 10^(6) A/cm^(2) at 77K and zero applied field.

关键词： Films Highly field.

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基于熵权法的区间数多指标决策方法及应用

数学的实践与认识 2020年第7期50卷 171-179页

作者：孙爱民陕西能源职业技术学院基础课教学部陕西咸阳712000

以区间数的距离及规范化理论为基础探讨了属性值为区间数的多指标决策问题.分别构建了基于熵权法的区间数TOPSIS评价模型、基于熵权法的区间数灰色关联评价模型,基于熵权法的区间数TOPSIS-灰色关联组合评价模型.通过实例分析表明了,三... 详细信息

以区间数的距离及规范化理论为基础探讨了属性值为区间数的多指标决策问题.分别构建了基于熵权法的区间数TOPSIS评价模型、基于熵权法的区间数灰色关联评价模型,基于熵权法的区间数TOPSIS-灰色关联组合评价模型.通过实例分析表明了,三种模型的算法的有效性及评价结果的合理性.进一步比较三种评价结果,说明了基于区间数的TOPSIS-灰色关联组合评价模型对方案的排序更具稳定性和实用性.

关键词：多指标决策熵权法区间数 TOPSIS 灰色关联度

基于新陈代谢灰色预测模型的西安市电力需求量的预测

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数学的实践与认识 2019年第23期49卷 298-305页

作者：孙爱民陕西能源职业技术学院

选取西安市2010-2017年的总用电量数据,建立了灰色GM(1,1)模型,对西安市全年电力需求量进行预测.经检验,模型具有较高的精度.进一步通过建立新陈代谢GM(1,1)模型对西安市未来5年的全年电力需求量进行预测,为西安市的电力发展提供科学决... 详细信息

选取西安市2010-2017年的总用电量数据,建立了灰色GM(1,1)模型,对西安市全年电力需求量进行预测.经检验,模型具有较高的精度.进一步通过建立新陈代谢GM(1,1)模型对西安市未来5年的全年电力需求量进行预测,为西安市的电力发展提供科学决策依据.

关键词：电力需求量灰色预测 GM(1,1)模型