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Manufacture of large displacement antiferroelectric ceramic and its properties

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Journal of Southeast University(English Edition) 2004年第2期20卷 205-208页

作者：沈星季赛陈勇南京航空航天大学智能材料与结构航空科技重点实验室南京210016

Reduced and internally biased oxide wafer (RAINBOW) Pb (Sn, Zr, Ti) O3 (PSZT) antiferroelectric ceramics are fabricated by chemical reduction. It is a kind of large displacement actuating materials composed of reduced and unreduced layers. It is found that PSZT is easily reduced and the optimal conditions for producing RAINBOW samples are determined to be 870°C for 2 to 3 h, which results in a reduced layer composed of metallic lead and refractory oxides (PbO, ZrO2 and ZrTiO4). The phase transitions from antiferroelectric state to ferroelectric state occur at lower field strength in RAINBOW samples compared with normal PSZT ceramics. Larger axial displacement is also obtained from RAINBOW samples by application of electric fields exceeding the phase switching level. However, the actuating properties of RAINBOW samples are dependent on the manner of applying load on it.

关键词： Antiferroelectric materials Lead Phase transitions Reduction

Preoperative laser reduces silicone oil use in primary diabetic vitrectomy

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International Journal of Ophthalmology(English edition) 2022年第4期15卷 591-597页

作者： Wen-Bin Zheng Xiao-Hu Ding Kun-Bei Lai ji-Zhu Li Yu-Qing Wu Yuan Ma Zi-Ye Chen Shi-Da Chen sai-Nan Xiao Bing-Qian Liu Ying Lin Tao Li State Key Laboratory of Ophthalmology Zhongshan Ophthalmic CenterSun Yat-sen UniversityGuangdong Provincial Key Laboratory of Ophthalmology and Visual ScienceGuangdong Provincial Clinical Research Center for Ocular DiseasesGuangzhou 510060Guangdong ProvinceChina

AIM: To identify the predictive factors and laser photocoagulation associated with the use of silicone oil as endotamponade during primary diabetic vitrectomy. METHODS: The medical and surgical records of 690 patients(798 eyes) who underwent primary diabetic vitrectomy at a tertiary eye hospital in China from January 2018 to December 2018 were reviewed in this retrospective cohort study. The patients’ baseline characteristics and preoperative treatments were recorded. The binary Logistic regression model was used to evaluate the risk factors for the use of silicone oil as endotamponade agent during primary vitrectomy for proliferative diabetic retinopathy(PDR)-related ***: Among 690 patients with mean age of 52.1±10.5 y(range: 18-85 y), 299/690(43.3%) were female. The 31.6% of the eyes received preoperative laser treatment, and 72.4% of the eyes received preoperative anti-VEGF adjuvant therapy. Non-clearing vitreous haemorrhage(VH) alone or combined with retinal detachment was the main surgical indication(89.5%) for primary vitrectomy. Silicone oil was used as endotamponade in 313(39.2%) eyes. Lack of preoperative laser treatment [odds ratio(OR) 0.66, 95% confidence interval(CI): 0.48-0.92;P=0.015] and older age(OR 0.96, 95%CI: 0.95-0.98;P<0.001) were predictors of silicone oil tamponade during primary vitrectomy for PDR. CONCLUSION: The lack of preoperative laser treatment is a significant predictor of silicone oil tamponade during primary vitrectomy for PDR. However, the severity of PDR relevant to silicone oil use should be further evaluated.

关键词： proliferative diabetic retinopathy vitrectomy laser photocoagulation silicone oil tamponade predictive factors

Phase transition and near-zero thermal expansion of Zr_(0.5)Hf_(0.5)VPO_7

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Chinese Physics B 2018年第6期27卷 350-354页

作者： Jun-Ping Wang Qing-Dong Chen sai-Lei Li Yan-Jun ji Wen-Ying Mu Wei-Wei Feng You-Wen Liu Gao-jie Zeng Er-Jun Liang College of Science Nanjing University of Aeronautics and Astronautics Nanjing 210016 China College of Aeronautics and Engineering Binzhou College Binzhou 256603 China Key Laboratory of Materials Physics of Ministry of Education School of Physical Science and Engineering Zhengzhou University Zhengzhou 450052 China

The Zr（0.5）Hf（0.5）VPO7 is successfully synthesized by the solid-state method with near-zero thermal expansion. Powder x-ray diffraction（XRD）, Raman spectroscopy, thermal dilatometry, and scanning electron microscopy（SEM） are used to investigate the structure, the phase transition, and the coefficient of thermal expansion（CTE） of Zr（0.5）Hf（0.5）VPO7. The investigation results show that the samples are of the single cubic type with a space group of Pa3ˉ at room temperature（RT）.It can be inferred that the superstructure is transformed from the 3 × 3 × 3 superstructure to the 1 × 1 × 1 ideal crystal in a temperature range between 310 K and 323 K. The CTE is measured by a dilatometer to be 0.59 × 10^（-6） K^（-1）（310 K–673 K）. The values of intrinsic（XRD） and extrinsic（dilatometric） thermal expansion are both near zero. The results show that Zr（0.5）Hf（0.5）VPO7 has near-zero thermal expansion behavior over a wide temperature range.

关键词： near-zero thermal expansion phase transition x-ray diffraction (XRD) Raman spectrum

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在线判别双字典学习的目标跟踪算法

小型微型计算机系统 2016年第10期37卷 2366-2370页

作者：吉训生陈赛江南大学物联网工程学院江苏无锡214122

传统目标跟踪算法的模板更新方法易导致目标模型漂移,为此提出一种在线判别双字典学习算法更新目标模板.双字典由目标字典和投影字典组成,其中目标字典表示目标模板.根据目标和背景样本在线迭代学习双字典,保证获其对目标维持高度描述性... 详细信息

传统目标跟踪算法的模板更新方法易导致目标模型漂移,为此提出一种在线判别双字典学习算法更新目标模板.双字典由目标字典和投影字典组成,其中目标字典表示目标模板.根据目标和背景样本在线迭代学习双字典,保证获其对目标维持高度描述性.通过判别函数的约束,不但降低背景信息更新到目标字典中的概率,而且保证真实目标在投影近字典上的投影近似于在目标字典上的稀疏系数,背景在投影字典上的投影近似零.因为投影的运算量较低,所以利用投影字典选择与目标字典相近的候选目标可以降低算法整体运算量.实验表明,在各种复杂环境中,算法都具有较高的稳定性.

关键词：稀疏表示模型漂移目标字典投影字典

Positron emission tomography-adapted therapy in low-risk diffuse large B-cell lymphoma:results of a randomized,phase Ⅲ,non-inferiority trial

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Cancer Communications 2023年第8期43卷 896-908页

作者： Qing Shi Yang He Hong-Mei Yi Rong-ji Mu Xu-Feng jiang Di Fu Lei Dong Wei Qin Peng-Peng Xu Shu Cheng Qi Song sai-Juan Chen Li Wang Wei-Li Zhao State Key Laboratory of Medical Genomics National Research Center for Translational Medicine at ShanghaiShanghai Institute of HematologyRuijin Hospital Affiliated to Shanghai Jiao Tong University School of MedicineShanghaiP.R.China Department of Pathology Ruijin Hospital Affiliated to Shanghai Jiao Tong University School of MedicineShanghaiP.R.China Clinical Research Institute Shanghai Jiao Tong University School of MedicineShanghaiP.R.China Department of Nuclear Medicine Ruijin Hospital Affiliated to Shanghai Jiao Tong University School of MedicineShanghaiP.R.China Department of Radiology Ruijin Hospital affiliated to Shanghai Jiao Tong University School of MedicineShanghaiP.R.China Laboratory of Molecular Pathology Pole de Recherches Sino-Francis en Science du Vivant et GénomiqueShanghaiChina

Background:The current standard of care for non-bulky diffuse large B-cell lymphoma(DLBCL)patients with an International Prognostic Index(IPI)of 0 is four cycles of rituximab plus cyclophosphamide,doxorubicin,vincristine and prednisone(R-CHOP)but whether the same efficacy can be achieved with reduced chemotherapy regimen of four cycles for non-bulky DLBCL patients with an IPI of 1 remains *** study compared four cycles versus six cycles of chemotherapy in non-bulky low-risk DLBCL patients with negative interim positron emission tomography with computed tomography(PET-CT,Deauville 1-3),irrespective of age and other IPI risk factors(IPI 0-1).Methods:This was an open-label,randomized,phaseⅢ,non-inferiority *** aged 14-75 years with newly diagnosed low-risk DLBCL,according to IPI,achieving PET-CT confirmed complete response(CR)after four cycles of R-CHOPwere randomized(1:1)between four cycles of rituximab(4R-CHOP+4R arm)or two cycles of R-CHOP plus two cycles of rituximab(6R-CHOP+2R arm).The primary endpoint was 2-year progression-free survival(PFS),conducted in the intention-to-treat *** was assessed in patients with at least one cycle of assigned *** non-inferiority margin was-8%.Results:A total of 287 patients were included in the intention-to-treat analysis,the median follow-up was 47.3 months,and the 2-year PFS rate was 95%(95%confidence interval[CI],92%to 99%)and 94%(95%CI,91%to 98%)for the 4R-CHOP+4R and 6R-CHOP+2R *** absolute difference in 2-year PFS between the two arms was 1%(95%CI,-5%to 7%),supporting the non-inferiority of 4R-CHOP+*** 3-4 neutropenia was lower in the last four cycles of rituximab alone in the 4R-CHOP+4R arm(16.7%versus 76.9%),with decreased risk of febrile neutropenia(0.0%versus 8.4%)and infection(2.1%versus 14.0%).Conclusions:For newly diagnosed low-risk DLBCL patients,interim PET-CT after four cycles of R-CHOP was effective in identifying patients with Deauville 1-3 who would have a goo

关键词： diffuse large B-cell lymphoma low-risk positron emission tomography randomized phaseⅢtrial

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菊芋低聚果糖抗运动疲劳作用研究

食品安全质量检测学报 2022年第2期13卷 599-604页

作者：庞基赛广西机电职业技术学院学生工作处南宁530007

目的探究菊芋低聚果糖抗运动疲劳作用。方法利用C2C12细胞和SD大鼠作为研究对象,通过大鼠跑步耐力试验,测定不同剂量组和对照组糖原、血清氨、无机磷酸盐、乳酸含量,以及肌肉乳酸脱氢酶(lactate dehydrogenase, LDH)和血清肌酸激酶(crea... 详细信息

目的探究菊芋低聚果糖抗运动疲劳作用。方法利用C2C12细胞和SD大鼠作为研究对象,通过大鼠跑步耐力试验,测定不同剂量组和对照组糖原、血清氨、无机磷酸盐、乳酸含量,以及肌肉乳酸脱氢酶(lactate dehydrogenase, LDH)和血清肌酸激酶(creatine kinase, CK)活性、血浆丙二醛(malondialdehyde, MDA)含量和谷胱甘肽过氧化物酶(glutathione peroxidase, GPx)活性的变化。结果添加菊芋低聚果糖可显著提高大鼠跑步耐力和糖原在肝脏和肌肉的积累量(P<0.05),降低疲劳相关标记物如血清氨、无机磷酸盐、乳酸含量,提高LDH和GPx活性,降低CK活性和MDA含量。结论菊芋低聚果糖可作为一种功能性原料抗高强度运动引起的疲劳。

关键词：菊芋低聚果糖抗运动疲劳高强度运动

Er/Yb∶Gd_(0.5)Lu_(0.5)VO_4多晶原料的合成及表征

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人工晶体学报 2015年第10期44卷 2786-2792页

作者：杨光赛叶宁王继扬福建师范大学材料科学与工程学院福州350108 中国科学院福建物质结构研究所福州350002 山东大学晶体材料国家重点实验室济南250100

Er/Yb∶Gd0.5Lu0.5VO4晶体用于人眼安全和超快调Q脉冲激光领域中,而生长该类晶体的原料需纯度高、成分均匀、配比准确。以三种方法合成Er/Yb∶Gd0.5Lu0.5VO4原料:(1)利用液相法合成的Er VO4、Yb VO4、Lu VO4、Gd VO4以一定比例混合在高... 详细信息

Er/Yb∶Gd0.5Lu0.5VO4晶体用于人眼安全和超快调Q脉冲激光领域中,而生长该类晶体的原料需纯度高、成分均匀、配比准确。以三种方法合成Er/Yb∶Gd0.5Lu0.5VO4原料:(1)利用液相法合成的Er VO4、Yb VO4、Lu VO4、Gd VO4以一定比例混合在高温下烧结(液相-固混法);(2)采用液相共沉淀法生成Er/Yb∶Gd0.5Lu0.5VO4沉淀后在高温下烧结(液相-液混法);(3)以柠檬酸为络合剂,用溶胶-凝胶法合成前驱体,在高温下烧结。利用XRD、FTIR、SEM、ICP、EDS等分析方法对合成原料表征,探讨各种方法合成原料的最佳条件,从纯度、颗粒尺寸、均匀性、组分准确性等方面比较三种方法合成原料的优缺点,为合成优质钒酸盐混晶原料提供重要的实验依据。

关键词： Gd0.5Lu0.5VO4 液相合成溶胶-凝胶法多晶原料

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一种数据驱动的可重构计算统一编程模型

电子学报 2007年第11期35卷 2123-2128页

作者：周学海罗赛王峰齐骥中国科学技术大学计算机科学技术系安徽合肥230027

可重构计算以其优异的性能和高度的灵活性,在国际国内研究领域逐渐引起广泛的关注.然而,在研的可重构计算系统架构多种多样,编程模型多与体系结构相关,使用和移植都非常困难.本文为解决编程通用性问题,从可重构计算的基本特征出发,提出... 详细信息

可重构计算以其优异的性能和高度的灵活性,在国际国内研究领域逐渐引起广泛的关注.然而,在研的可重构计算系统架构多种多样,编程模型多与体系结构相关,使用和移植都非常困难.本文为解决编程通用性问题,从可重构计算的基本特征出发,提出数据驱动的,支持异构任务并行计算的统一编程模型,并讨论其实现方法.该模型基于生产者.消费者通讯机制,支持多种类型的计算结点和通讯网络,具有高度的抽象性.实验结果显示,使用统一编程模型进行应用设计,在不同的架构上能够使用同样的用户程序,并且获得比纯硬件加速方式更高的加速比.

关键词：可重构计算编程模型生产者-消费者通讯模型

镍基催化剂上稻草水蒸气重整制富氢合成气(英文)

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催化学报 2013年第7期34卷 1462-1468页

作者：李庆远季生福胡金勇蒋赛北京化工大学化工资源有效利用国家重点实验室北京100029

采用浸渍法制备了SiO2,γ-Al2O3,CaO和TiO2负载的Ni催化剂,以及不同MgO含量的MgO-7.5%Ni/γ-Al2O3催化剂,利用X射线衍射和N2吸附-脱附技术表征了催化剂的结构,在固定床反应器上评价了它们在稻草水蒸气催化重整制合成气反应中的催化性能... 详细信息

采用浸渍法制备了SiO2,γ-Al2O3,CaO和TiO2负载的Ni催化剂,以及不同MgO含量的MgO-7.5%Ni/γ-Al2O3催化剂,利用X射线衍射和N2吸附-脱附技术表征了催化剂的结构,在固定床反应器上评价了它们在稻草水蒸气催化重整制合成气反应中的催化性能,考察了反应条件对催化剂性能的影响.结果表明,以γ-Al2O3为载体时Ni催化剂活性最高,其中7.5%Ni/γ-Al2O3催化剂的H2收率可达1071.3ml/g,H2:CO的体积比为1.4:1;同时,MgO的添加进一步提高了该催化剂的性能,当MgO含量为1.0%时,H2收率可达1194.6ml/g,H2:CO体积比可达3.9:1.可见MgO的加入促进了Ni基催化剂上稻草水蒸气催化重整制合成气反应的进行,同时使得合成气中CO发生水-汽转换反应,从而大大提高了合成气中H2含量.

关键词：镍基催化剂稻草水蒸气重整合成气氢气