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Growth of AgGaS_2 single crystal by descending crucible with rotation method and observation of properties

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Chinese Science Bulletin 2001年第23期46卷 2009-2013页

作者： zhao Beijun, ZHU shifu, LI Zhenghui, YU Fengliang, ZHU Xinghua & GAO DeyouDepartment of Materials Science, Sichuan University, Chengdu 610064, China Department of Materials Science Sichuan University Chengdu China

This note reports a new procedure of polycrystalline synthesis and a new technique of single crystal growth on AgGaS2, i.e. two-zone temperature oscillation vapor transporting and descending crucible with rotation. A single phase dense AgGaS2 polycrystalline ingot was synthesized, and a crack-free AgGaS2 single crystal with 15 mm in diameter and 30 mm in length was grown by the techniques mentioned above. Structure integrity of the crystal was studied by the X-ray diffraction technique. Six order X-ray spectra from the {011} face of the crystal were obtained, and an anomalous phenomenon was observed for the first time that intensity of the higher order diffraction peak is much stronger than that of the lower order diffraction peak. Etch-pits of the crystal were observed by the scanning electron microscopy (SEM).

关键词： infrared nonlinear crystal AgGaS2 polycrystalline syn-thesis crystal growth X-ray diffraction etch-pits observation.

Spatial Strategy for the Information Society:Rethinking Smart City

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China City Planning Review 2014年第2期23卷 58-64页

作者： Miaoxi zhao shifu WANG Luying LI State Key Laboratory of Subtropical Building Science School of ArchitectureSouth China University of Technology Guangzhou Urban Planning&Design Studio

This study examines the topic of the information society from a spatial perspective. It reviews the basic impacts of information technology on urban space in terms of travel behavior, functional organization, and spatial image, and then puts forward the corresponding spatial planning strategy for the information society. Inf luenced by information technology, the concentration/ de-concentration of urban functional organization and the changes in travel demand have increased the complexity of the urban spatial structure, while the city image delivered by digital media promotes the blending of real space and virtual space. According to relevant researches, information society is considered an objective existence, whereas smart city can be perceived as a planning paradigm embodied with a promising vision. Therefore, spatial planning in the information society should be conducted from the two perspectives of both instrumental rationality and value rationality. On the basis of that, this study proposes that the construction of a smart city should foremost improve the spatial effi ciency with the help of information technology, and pay attention to the spatial probability during the process of urban development, so as to bestow the spaces of all levels the adaptability to respond to different scenarios; on the other hand, the spatial strategy of a smart city should return to people-oriented values and shape localized spaces, so as to cope with the challenges of global mobility and ultimately achieve sustainable regional development.

关键词： information society urban space smart city resilience

Study on Surface Treatments on CdSe Wafers

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Journal of Rare Earths 2006年第Z1期24卷 272-275页

作者： Ren Rui zhao Beijun Zhu shifu He Zhiyu Wang Ruilin Wen Cai Ye Linsen Zhong Yuhang Zhu Xinghua Department of Materials Science Sichuan UniversityChengdu 610064China

The surface treatments on CdSe wafers were studied by means of SEM,XPS and micro-current test *** relations between electrical properties of CdSe wafers and surface topography,composition and structure were *** results show that the change of surface composition by etching is beneficial to decrease leakage ***,the increase of oxygen on surface caused by passivation can largely decrease leakage *** passivating time is 40 min,the wafers surface appears smooth and compact,which will decrease the density of surface state,the optimal electrical property of the wafer is therefore obtained.

关键词： CdSe crystal surface treatment etching passivation electrical property

Synthesis of AgGa_(1-x)In_(x)Se_(2) Polycrystalline Materials

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Journal of Rare Earths 2006年第Z1期24卷 269-271页

作者： Liu Juan zhao Beijun Zhu shifu Huang Yi Zhang Jianjun Zhu Weilin Xu Chengfu Chen Baojun Li Ming He Zhiyu Department of Materials Science Sichuan UniversityChengdu 610064China

AgGa_(1-x)In_(x)Se_(2)polycrystals were synthesized by the method of mechanical oscillation and temperature oscillation.X-ray diffraction spectra of polycrystal powder are conformable with the JCPDS *** constants a and c calculated from the XRD were found to obey Vegard's *** melting point of AgGa_(0.8)In_(0.2)Se_(2)obtained by means of differential scanning calorimetry(DSC)is 796.53℃.The DSC curve also show that there are no other transformation points below the melting *** results indicate that polycrystalline materials synthesized by the method mentioned above are high-quality and can be used to grow single crystals by the vertical Bridgman technology.

关键词： nonlinear optical materials AgGa_(1-x)In_(x)Se_(2) polycrystal synthesis lattice constants

Efficacy of comprehensive cognitive health management for Shanghai community older adults with mild cognitive impairment

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General Psychiatry 2022年第4期35卷 240-248页

作者： Jiayuan Qiu Lu zhao shifu Xiao Shaowei Zhang Ling Li Jing Nie Li Bai Shixing Qian Yang Yang Michael Phillips Meiqing Sheng Yuan Fang Xia Li Department of Geriatric Psychiatry Shanghai Mental Health CenterShanghai Jiao Tong University School of MedicineShanghaiChina Shanghai I-zhaohu Senior Care Services ShanghaiChina

Background The management of modifiable risk factors and comorbidities may impact the future trajectory of cognitive impairment,but easy-to-implement management methods are *** This study investigated the effects of simple but comprehensive cognitive health management practices on the cognitive function of older adults in the community with normal cognition(NC)and mild cognitive impairment(MCI).Methods The comprehensive cognitive health management programme included a psychiatric assessment of the cognitive risk factors for those in the intervention groups and individualised recommendations for reducing the risks through self-management supported by regular medical professional *** intervention groups for this study included 84 elderly participants with NC and 43 elderly participants with MCI who received comprehensive cognitive health *** control groups included 84 elderly participants with NC and 43 elderly participants with MCI who matched the intervention group’s general characteristics and scale scores using the propensity matching score *** Montreal Cognitive Assessment(MoCA)scale and Geriatric Depression Scale(GDS)scores were compared after a 1-year *** For older adults with MCI in the intervention group,MoCA scores were higher at the 1-year followup than at baseline(24.07(3.674)vs 22.21(3.052),p=0.002).For the MoCA subscales,the intervention group’s abstract and delayed memory scores had significantly increased during the 1-year ***,in a generalised linear mixed model analysis,the interaction effect of group×follow-up was statistically significant for the MCI group(F=6.61,p=0.011;coefficients=5.83).Conclusions After the comprehensive cognitive health management intervention,the older adults with MCI in the community showed improvement at the 1-year *** preliminary study was the first to demonstrate an easy-to-implement strategy for modifying the cognitive risk factors of elderl

关键词： impairment comprehensive management

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广佛市民地铁跨城活动的空间分析

城市规划学刊 2012年第3期 23-29页

作者：王世福赵渺希华南理工大学建筑学院亚热带建筑科学国家重点实验室华南理工大学建筑学院城市规划系

以揭示广州佛山城市居民基本活动的空间交互现象为研究目标,通过对地铁出行者居住、工作、休闲等基本活动的调查和访谈,深入分析了广佛同城化过程中居民跨城活动的空间流向、社会构成和典型个体的出行日志研究结果表明:在空间流向方面,... 详细信息

以揭示广州佛山城市居民基本活动的空间交互现象为研究目标,通过对地铁出行者居住、工作、休闲等基本活动的调查和访谈,深入分析了广佛同城化过程中居民跨城活动的空间流向、社会构成和典型个体的出行日志研究结果表明:在空间流向方面,地铁线对广佛两地的空间效应呈现出非均衡的特征,广州在休闲方面有着更为明显的吸聚优势,佛山更多地成为居住选择地,且对地铁的依赖性更大;在社会特征方面,高学历、专业技术、白领人群构成了两地之间跨城出行者的主要特征;在微观的个体层面,高技术影响下的跨城出行者,其工作日与休闲日的时间界限趋于模糊,而交通性的节点空间成为其转换各种基本活动的场所。

关键词：广州佛山基本活动地铁跨城

非标准抗磷脂抗体阳性不良妊娠结局预测模型的建立和验证

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中国计划生育和妇产科 2024年第11期16卷 54-58页

作者：李冉陈荔闽代玉红朱霄鹤赵世福潍坊市人民医院产科山东潍坊261000 潍坊市人民医院健康管理中心青州市妇幼保健院产科潍坊医学院解剖教研室

目的建立并验证非标准抗磷脂抗体(NC-aPL)阳性孕妇不良妊娠结局风险预测模型。方法选取2021年5月至2022年6月就诊于各中心的4 000例NC-aPL阳性孕妇作为研究对象,采用随机数字表法分为建模组(2 800例)与验证组(1 200例);根据妊娠后是... 详细信息

目的建立并验证非标准抗磷脂抗体(NC-aPL)阳性孕妇不良妊娠结局风险预测模型。方法选取2021年5月至2022年6月就诊于各中心的4 000例NC-aPL阳性孕妇作为研究对象,采用随机数字表法分为建模组(2 800例)与验证组(1 200例);根据妊娠后是否出现不良妊娠结局将建模组分为不良妊娠组和无不良妊娠组;采用R软件通过Logistic回归建立预测模型并绘制列线图。采用受试者工作特征(ROC)曲线、校准曲线和Hosmer-Lemeshow拟合优度检验验证和评价预测模型的区分度和校准度。结果本研究建模组中出现不良妊娠结局831例,发生率29.68%;验证组中出现357例,发生率29.75%。多因素Logistic回归分析显示有吸烟史、不良生活方式、抗磷脂抗体-抗β2糖蛋白I抗体(aPL-αβ2GPI)阳性、未规范用药是NC-aPL阳性孕妇不良妊娠结局的危险因素(P<0.05)。验证结果显示,建模组与验证组ROC曲线下面积(AUC)分别为0.853、0.936,区分度较好;H-L检验显示一致性良好(χ^(2)=7.208、7.163,P=0.503、0.510)。结论有吸烟史、不良生活方式、aPL-αβ2GPI阳性、未规范用药是NC-aPL阳性孕妇不良妊娠结局的危险因素,以此构建的列线图模型具有良好的区分度与一致性,能直观地预测NC-aPL阳性孕妇发生不良妊娠结局的风险。

关键词：非标准抗磷脂抗体妊娠结局列线图

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低氧烟道环境制备污泥活性炭

农业工程学报 2013年第15期29卷 215-222页

作者：赵培涛葛仕福刘长燕东南大学能源热转换及其过程测控教育部重点实验室南京210096 东京工业大学环境科学与技术系

为降低污泥制备活性炭的成本,以高温低氧烟道气为媒介,研究了活化时间、温度、蒸气含量以及氧含量对污泥活性炭性能的影响规律,结果表明：活化温度、活化时间及水蒸气流量的最佳值分别为800°C、90min和34.8%,该条件下污泥活性炭比表面... 详细信息

为降低污泥制备活性炭的成本,以高温低氧烟道气为媒介,研究了活化时间、温度、蒸气含量以及氧含量对污泥活性炭性能的影响规律,结果表明：活化温度、活化时间及水蒸气流量的最佳值分别为800°C、90min和34.8%,该条件下污泥活性炭比表面积、产率、甲基橙及亚甲基蓝吸附值分别为：246.3m2/g、46%、14.8mg/g、18.1mg/g。因而,高温低氧烟气直接用于物理活化法制备污泥活性炭,活化气量（水蒸汽）不够,产品活性炭的性能差,活化温度高达800°C,运行成本仍偏高。将湿污泥用ZnCl2按1∶1浸渍16h后活化炭化,在活化温度、活化时间、氧含量分别为550°C、90min、2%时,污泥活性炭的产率为59%,其比表面积和亚甲基蓝吸附值分别达516.1m2/g和129.8mg/g,孔体积为0.29cm3/g,微孔体积为0.16cm3/g,平均孔径为3.95nm,性能较好。氧气能促进活性炭微孔的形成与发展,最佳的氧含量为2%~4%。与无氧条件下制备的污泥活性炭相比,氧含量为4%时制得的污泥活性炭的比表面积增加了6.82%,亚甲基蓝吸附值提高了2.75倍。该研究表明：高温烟气作为热源、保护气和活化气,结合化学活化法,可将脱水湿污泥直接制成污泥活性炭。该结果可为低成本制备污泥活性炭、实现污泥处理的资源化利用提供一定的参考。

关键词：活性炭温度吸附物理活化 ZnCl2活化高温低氧烟道气

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一种基于本征正交分解的并群方法

原子能科学技术 2023年第8期57卷 1575-1583页

作者：武世伏张乾张晋超赵强哈尔滨工程大学核安全与仿真技术国防重点学科实验室黑龙江哈尔滨150001 浙江大学物理学系浙江近代物理中心先进核能理论与应用实验室浙江杭州310058

传统两步法的少群近似是导致功率分布误差的重要来源。离散广义并群理论是一种新的并群方法,可以通过离散正交基函数在少群结构中恢复精细能谱,一方面降低并群误差,另一方面可以提高中子学计算在能量上的分辨率,同时保持少群输运计算的... 详细信息

传统两步法的少群近似是导致功率分布误差的重要来源。离散广义并群理论是一种新的并群方法,可以通过离散正交基函数在少群结构中恢复精细能谱,一方面降低并群误差,另一方面可以提高中子学计算在能量上的分辨率,同时保持少群输运计算的效率优势。本文采用本征正交分解方法,对一系列UO 2和MOX燃料栅元的典型44群能谱所构成的样本空间进行正交展开,获得代表能谱特征的正交基函数。基于并群理论,对一维UO 2和MOX栅元混合组件问题进行了4群的输运计算,并重构出特定位置的44群能谱。同时,对截断阶数对不同少群结构重构精度的影响进行了分析。在4群的少群结构下,选取干涉效应最明显的组件结合处的UO 2和MOX栅元进行44群输运计算获得的能谱作为样本快照进行本征正交分解生成的正交基函数,在7阶便可以保证特征值偏差小于37 pcm,而传统并群方法的偏差为1359 pcm;恢复干涉效应的栅元能谱相对偏差小于0.5%,而传统并群方法使用的能谱与真实能谱差别在14%以上。基于本征正交分解的并群方法在改善两步法能群归并误差中有着很大的应用前景。

关键词：能群归并能谱重构本征正交分解干涉效应