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Chinese Physics Letters 1999年第1期16卷 38-40页

作者： ZHANG Ning ding wei-ping ZHONG wei National Laboratory of Solid State Microstructures Nanjing UniversityNanjing 210093 Department of Physics Nanjing Normal UniversityNanjing 210097

Under a uniaxial pressure of 10-20 MPa,the unusual changes of lattice parameters and remarkable structural distortions in colossal magnetoresistance perovskite La_(l-x)Sr_(x)MnO_(3)(0.15≤x≤0.25)have been *** structural distortions were found to be in good agreement with Bridgman *** phenomena suggest that the lattice of the manganese perovskite is flexible and the versatility of the electronic and magnetic properties in the perovskites may stems from the lattice flexibility.

关键词： equation. perovskite lattice

Large Piezoresistance and Pressure-Induced Change in Electric Properties in Perovskite-like La_(0.85)Sr_(0.15)MnO_(3)

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Chinese Physics Letters 1996年第11期13卷 870-873页

作者： ZHANG Ning ding wei-ping GUO Zai-bing XING ding-yu DU You-wei LI Gang ZHENG Yi-xin National Laboratory of Solid State Microstructures Nanjing UniversityNanjing 210093 Department of Physics Nanjing Normal UniversityNanjing 210024

Uniaxial pressure dependencies of the electric properties of perovskite-like La_(0.85)Sr_(0.15)MnO_(3)(0.2≤x≤0.6)system have been investigated.A large nonlinear piezoresistance effect and a remarkable pressure-induced change of metal-semiconductor(M-S)transition have been *** La_(0.85)Sr_(0.15)MnO_(3),the piezoresistance value can reach about 86%at 290K under a pressure of 16.8MPa,and the pressure coefficient of Tp,the onset of the M-S transition,is as high as 6.4 K/MPa,which is significantly larger than that of known similar pressure *** pressure effects suggest that the resistivity of the perovskite compounds is relative not only to double exchange but also to the symmetry of *** phenomenon may provide another route in understanding the colossal magnetoresistance behavior in the perovskites.

关键词： resistance perovskite

Structure and Magnetocaloric Properties in Perovskitelike La_(1-x)Na_(x)MnO_(z) Powders

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Chinese Physics Letters 1998年第2期15卷 134-136页

作者： CHEN wei ZHONG wei HOU Deng-lu ding wei-ping DU You-wei YAN Qi-jie National Laboratory of Solid State Microstructure Nanjing UniversityNanjing 210093 Department of Chemistry Nanjing UniversityNanjing 210093 Department of Physics Hebei Normal UniversityShijiazhuang 050091

Perovskitelike manganese oxides La_(l-x)Na_(x)MnO_(z)(x=0.075,0.100,0.165,0.200)have been fabricated using sol-gel *** analysis,temperature programmed reduction(TPR)technique and magnetic measurement have been used to study the effect of Na ion substituted amount on Mn-O distance,the oxygen content,and the magnetocaloric properties of these *** show there is no clear correlation between the substituted amount and mean Mn valence,but a close relationship is observed between Tc and the bond distance of *** materials have quite large magnetic entropy changes upon an application of a low magnetic field and can be utilized as more suitable candidates for magnetic refrigerants with wide temperature span.

关键词： materials technique substituted

Giant Magnetoresistance in Granular Perovskite La_(0.8)Sr_(0.2)MnO_(3)

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Chinese Physics Letters 1997年第3期14卷 229-232页

作者： ZHANG Ning ding wei-ping GUO Zai-bin ZHONG wei DU Kai-he DU You-wei National Laboratory of Solid State Microstructures Nanjing UniversityNanjing 210093 Key Laboratory of Jiangsu Province for Optic and Electric Techniques Nanjing Normal UniversityNanjing 210024

The electric and magnetic properties in granular perovskite La_(0.8)Sr_(0.2)MnO_(3) have been investigated.A giant magnetoresistance(GMR)has been observed at temperatures well below TC,the Curie temperature,associated with crystal intrinsic magnetic *** granular GMR effect is also isotropic but shows some characteristics different from those in the films and crystals of similar *** suggests an effect of interfacial spin-dependent tunneling in the granular perovskite at temperatures much lower than T_(C).In addition,with the reduction of grain size,an evident superparamagnetic behavior has been observed.

关键词： properties. perovskite

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高速随行叉车行驶稳定性分析与结构改进

系统仿真学报 2007年第4期19卷 922-924页

作者：王勇赵永平丁渭平总后勤部建筑工程研究所西安710032 西南交通大学机械工程学院成都610031

针对某型高速随行叉车的设计特点进行讨论,并基于ADAMS软件建立其悬架系统与整车匹配性仿真分析的CAE模型——虚拟样机。采用虚拟样机进行整车行驶稳定性的仿真分析,预测其直行稳定车速与弯道极限车速。并进一步判断影响行驶稳定性的结... 详细信息

针对某型高速随行叉车的设计特点进行讨论,并基于ADAMS软件建立其悬架系统与整车匹配性仿真分析的CAE模型——虚拟样机。采用虚拟样机进行整车行驶稳定性的仿真分析,预测其直行稳定车速与弯道极限车速。并进一步判断影响行驶稳定性的结构因素,提出改善性能的具体措施,即通过适当设置车轮定位而使转向车轮获得“自回正”能力,同时安装横向稳定杆以提高整车的侧倾角刚度。据此完成相应的结构改进,并通过性能对比试验证实了结构改进的有效性。

关键词：高速随行叉车行驶稳定性性能仿真结构改进

Effect of Different Blood Cycle Modeson Mass Transfer of Artificial Kidney

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Chinese Journal of Biomedical Engineering(English Edition) 2005年第2期14卷 65-71页

作者： LIU Tao He Li-qun ding wei-ping Zhao Gang GAO Da-yong Department of Thermal Science ＆ Energy Engineering USTCHefei 230027China Department of Mechanical Engineering University of Kentucky Lexington KY40506 USA

Based on the one-dimensional and unsteady-state Krogh model, this paper investigates mass transfer of artificial kidney under three blood cycle modes during the course of hemodialysis. The variations of the permeable solute clearance with increasing time and the dialysis time with increasing blood flux are simulated in detail,and then one optimal blood cycle mode is acquired. The results are very important to improve the clinical dialysis efficiency of artificial kidney.

关键词： Hollow fiber, Artificial kidney, Mass transfer, Unsteady state Blood cycle mode

一种基于约束关系的电子病历图像分割核聚类算法

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计算机应用 2007年第8期27卷 2066-2068,2071页

作者：丁卫平邓伟南通大学计算机科学与技术学院江苏南通226019 苏州大学计算机科学与技术学院江苏苏州215006

针对电子病历中图像分割问题,提出了基于约束关系的改进核聚类算法,该算法通过引入约束关系在图像分割前进行修正,从而提高图像分割效果。该核聚类算法在MR I中电子病历图像分割实验的结果表明,施加约束关系的核聚类算法能有效地解决电... 详细信息

针对电子病历中图像分割问题,提出了基于约束关系的改进核聚类算法,该算法通过引入约束关系在图像分割前进行修正,从而提高图像分割效果。该核聚类算法在MR I中电子病历图像分割实验的结果表明,施加约束关系的核聚类算法能有效地解决电子病历图像中含噪声以及灰度不均匀等问题,具有一定的鲁棒性和较好的图像分割效果。

关键词：核聚类电子病历图像分割鲁棒性

满怀赤诚执着追寻--陆华柏1949年后的艺术追寻与心路历程

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黄钟（武汉音乐学院学报） 2016年第3期 139-147页

作者：丁卫萍江苏省常熟理工学院音乐系常熟215500

陆华柏先生命运多舛,是我国近现代音乐史学界所关注的一位先驱。本文从陆华柏手稿、信件、思想汇报等第一手资料探寻他1949年后的心路历程,以陆华柏先生建国后的辉煌、蛰伏期的执着、晚年彷徨矛盾的心理,分段梳理了他1949年后的艺术人... 详细信息

陆华柏先生命运多舛,是我国近现代音乐史学界所关注的一位先驱。本文从陆华柏手稿、信件、思想汇报等第一手资料探寻他1949年后的心路历程,以陆华柏先生建国后的辉煌、蛰伏期的执着、晚年彷徨矛盾的心理,分段梳理了他1949年后的艺术人生追求,洞察陆华柏隐秘的内心世界,发现他既具有那一代知识份子心路旅程的共性特征,又具感人的个人情怀,为推进、丰富近现代音乐教育界代表性人物的学术研究充实有价值的文献。

关键词：陆华柏近现代音乐史音乐创作音乐教育新音乐

细菌在稀土磷块岩成矿中的作用及其应用——磷、磷灰石、磷块岩、生物磷酸盐、细菌与稀土关系和利用

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科学技术与工程 2022年第9期22卷 3464-3472页

作者：丁卫平中化地质矿山总局地质研究院北京100101

目前的稀土矿床主要与岩浆岩有关,对其研究较多,但对沉积岩中稀土研究较少。稀土作为战略性的矿产,系统研究稀土在分布广泛的沉积岩中的富集机理有重要意义。自然界的磷主要以磷灰石的形式存在,而磷灰石又在沉积岩中以磷块岩形成存在。... 详细信息

目前的稀土矿床主要与岩浆岩有关,对其研究较多,但对沉积岩中稀土研究较少。稀土作为战略性的矿产,系统研究稀土在分布广泛的沉积岩中的富集机理有重要意义。自然界的磷主要以磷灰石的形式存在,而磷灰石又在沉积岩中以磷块岩形成存在。对已知的磷块岩和生物磷酸盐中的稀土数据,磷块岩的电子显微镜下特征等进行研究,发现磷块岩和生物磷酸盐有一致的稀土分布特征,推测磷块岩是古老细菌的细胞壁的堆积,细胞壁实际是细小的磷灰石。在沉积岩中存在磷灰石的情况下,磷灰石对周围环境的稀土能无差别吸收,且随着时间的增加,不断吸收周围稀土,因此年代久远的化石的稀土含量高于现在生物骨骼稀土含量,其他矿物则很少吸收稀土。由此可以利用聚磷菌对周围稀土进行吸收,从而富集稀土,利用这一特征可使用细菌提纯稀土,减少化学物质在提纯稀土中的应用,对环境保护具有积极意义。

关键词：稀土元素无差别吸收微生物细菌生物磷酸盐磷块岩磷灰石

Surgical management in biliary restricture after Roux-en-Y hepaticojejunostomy for bile duct injury

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World Journal of Gastroenterology 2007年第48期13卷 6598-6602页

作者： Ji-Qi Yan Cheng-Hong Peng Jia-Zeng ding wei-ping Yang Guang-Wen Zhou Yong-Jun Chen Zong-Yuan Tao Hong-wei Li Department of Surgery Ruijin Hospital School of Medicine Shanghai Jiaotong University Shanghai 200025 China

AIM: To discuss the surgical method and skill of biliary restricture after Roux-en-Y hepaticojejunostomy for bile duct injury. METHODS: From November 2005 to December 2006, eight patients with biliary restricture after Roux-en-Y hepaticojejunostomy for bile duct injury were admitted to our hospital. Their clinical data were analyzed retrospectively. RESULTS: Bile duct injury was caused by cholecys- tectomy in the eight cases, including seven cases with laparoscopic cholecystectomy and one with mini- incision choleystectomy. According to the classification of Strasberg, type E1 injury was found in one patient, type E2 injury in three, type E3 injury in two and type E4 injury in two patients. Both of the type E4 injury patients also had a vascular lesion of the hepatic artery. Six patients received Roux-en-Y hepaticojejunostomy for the second time, and one of them who had type E4 injury with the right hepatic artery disruption received right hepatectomy afterward. One patient who had type E4 injury with the proper hepatic artery lesion underwent liver transplantation, and the remaining one with type E3 injury received external biliary drainage. All the patients recovered fairly well postoperatively. CONCLUSION: Roux-en-Y hepaticojejunostomy is still the main approach for such failed surgical cases with bile duct injury. Special attention should be paid to concomitant vascular injury in these cases. The optimal timing and meticulous and excellent skills are essential to the success in this surgery.

关键词： Bile duct injury Biliary stricture Roux-en-Y hepaticojejunostomy Hepatic artery injury