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Chinese Medical Journal 2011年第2期124卷 268-272页

作者： YANG Xiao-jun MENG song zhu Chun-fu JIANG Hong WU Wen-xi Department of General Surgery First Affiliated Hospital of Nanjing Medical University Nanjing Jiangsu 210029 China

Background Semi-mature dendritic cells （DCs） may induce tolerance rather than ***,little is known about the regulatory mechanism by which these DCs induce transplant *** differentiation factor 88 （MyD88） is a key adaptor of Toil-like receptor signaling,which plays a critical role in DC *** of MyD88-silenced immature DCs results in the generation of semi-mature *** explored the possibility of using these DCs to induce intestinal transplant tolerance in *** MyD88 expression was silenced in bone marrow DCs （F344 rats） using small interfering RNAs for 24 hours,at which point,lipopolysaccharide （LPS） was added to the culture for another 48 *** cells were analyzed for their in vitro and in vivo tolerizing *** Semi-mature DCs expressing moderate levels of MHC class Ⅱ and low levels of co-stimulatory molecules were found to produce interleukin （IL）-10,while IL-12 production was *** vitro co-culture with completely allogeneic T cells from Wistar rats led to a significant decrease in alloreactive T-cell *** vivo,the transfer of semi-mature DCs （1×106 ceils） followed by the transplantation of fully mismatched intestinal grafts （F344 rats） led to significantly prolonged survival compared to rats receiving immature and mature *** from semi-mature DC-treated rats contained lower concentrations of the pro-inflammatory cytokines IL-2 and interferon-Y 5 days after *** Semi-mature DCs may promote inducible allograft tolerance and this study suggests a new strategy by which to facilitate the induction of transplant tolerance.

关键词： dendritic cell immune tolerance intestinal transplantation

Lens distortion correction based on one chessboard pattern image

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Frontiers of Optoelectronics 2015年第3期8卷 319-328页

作者： Yubin WU Shixiong JIANG Zhenkun XU song zhu Danhua CAO School of Optical and Electronic Information Huazhong University of Science and Technology Wuhan 430074 China

This paper proposes a detection method of chessboard comer to correct camera distortions -including radial distortion, decentering distortion and prism distor- tion. This proposed method could achieve high comer detection rate. Then we used iterative procedure to optimize distortion parameter to minimize distortion residual. In this method, first, non-distortion points are evaluated by four points near image center; secondly, Levenberg-Marquardt nonlinear optimization algorithm was adopted to calculate distortion parameters, and then to correct image by these parameters; thirdly, we calculated comer points on the corrected image, and repeated previous two steps until distortion parameters converge. Results showed the proposed method by iterative procedure can make the impact of slight distortion around image center negligible and the average of distortion residual of one line is almost 0.3 pixels.

关键词： computer vision camera distortion distortion correction comer detection

A closed-form pricing formula for European options in an illiquid asset market

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Financial Innovation 2022年第1期8卷 883-900页

作者： Puneet Pasricha song-Ping zhu Xin-Jiang He School of Mathematics and Applied Statistics University of WollongongWollongongNSW 2522Australia School of Economics Zhejiang University of TechnologyHangzhouChina

This article addresses the problem of pricing European options when the underlying asset is not perfectly liquid.A liquidity discounting factor as a function of market-wide liquidity governed by a mean-reverting stochastic process and the sensitivity of the underlying price to market-wide liquidity is firstly introduced,so that the impact of liquidity on the underlying asset can be captured by the option pricing *** characteristic function is analytically worked out using the Feynman–Kac theorem and a closed-form pricing formula for European options is successfully derived *** numerical experiments,the accuracy of the newly derived formula is verified,and the significance of incorporating liquidity risk into option pricing is demonstrated.

关键词： European options Liquidity risk Liquidity discounting factor Characteristic function Conditional distribution

Stock index adjustments, analyst coverage and institutional holdings: Evidence from China

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China Journal of Accounting Research 2017年第3期10卷 281-293页

作者： song zhu Xiaoyu Jiang Xiaoli Ke Xiaoyu Bai Business School Beijing Normal University Bank of China

Using 231 pairs of matched firms from 2009 to 2012 in Chinese stock market,we find that the stock index adjustment significantly affects the analyst coverage, which in addition to the stock index leads to more analyst coverage, while deletion from the stock index has no significant effect, indicating that stock index adjustment can significantly change the information environments of firms that are added to the index. An index adjustment also affects institutional holdings in consideration of new information(e.g., changes in fundamentals and information environments). Changes in institutional holdings are partially due to changes in analyst coverage, and both index funds and other types can change their portfolios in response to changes in the target firms' informativeness.

关键词： Stock index adjustment Analyst coverage Institutional holding

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镁铝尖晶石对全抛釉陶瓷釉面性能的影响

中国陶瓷 2024年第7期60卷 48-53页

作者：张松竹杨元东杨倩杨晓峰汪庆刚潘岳邓来福广东蒙娜丽莎集团股份有限公司佛山528211 广东省大尺寸陶瓷薄板企业重点实验室佛山528211

为提升全抛釉陶瓷产品的耐磨性能,在全抛釉中引入耐磨强化组元—镁铝尖晶石,探究了镁铝尖晶石掺量对全抛釉陶瓷光泽度、硬度、耐磨性、物相与微观结构的影响规律。研究结果表明:在全抛釉陶瓷产品制造工况下(低温快烧,辊道窑烧成温度1220... 详细信息

为提升全抛釉陶瓷产品的耐磨性能,在全抛釉中引入耐磨强化组元—镁铝尖晶石,探究了镁铝尖晶石掺量对全抛釉陶瓷光泽度、硬度、耐磨性、物相与微观结构的影响规律。研究结果表明:在全抛釉陶瓷产品制造工况下(低温快烧,辊道窑烧成温度1220℃,烧成周期40 min),随着镁铝尖晶石掺量的增加,全抛釉层中镁铝尖晶石含量逐渐提升,继而可有效提升全抛釉的硬度与耐磨性;但是镁铝尖晶石的引入,会增大全抛釉的烧成温度,导致全抛釉层中气孔含量与尺寸增加,不利于提升全抛釉的光泽度、发色性能以及防污性能;此外,控制适宜的镁铝尖晶石掺量可制得综合性能优异的全抛釉产品:当镁铝尖晶石的添加量为12wt%时,釉层综合性能最优,产品维氏硬度达到7.42 GPa,莫氏硬度5级,耐磨性达到4级(6000转),同时抛光后产品具有较高的光泽度(94°)和优良的发色(蓝黄黑色差值<3.2)与防污性能(5级),完全能够满足全抛釉陶瓷产品的使用需求。

关键词：耐磨全抛釉镁铝尖晶石高硬度

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Effects of boronizing treatment on microstructural development and mechanical properties of additively manufactured TC4 titanium alloys

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Journal of Iron and Steel Research International 2019年第3期26卷 329-334页

作者： Jin-zhu song Wei Tang Jie-wen Huang Zi-kang Wang Xin-min Fan Ke-hong Wang College of Materials Science and Engineering Nanjing University of Science and TechnologyNanjing 210094JiangsuChina Jiangsu Product Quality Testing&Inspection Institute Nanjing 210007JiangsuChina

Microstructure and mechanical properties of additively manufactured TC4 alloys were investigated,following boronizing *** treatment process was carried out at temperatures ranging from 950 to 1050°C and held for 8-15 *** microstructural features of fabricated boride layers were examined by optical *** phase compositions of the boride layers were analyzed by X-ray *** hardness profile through the boride layers was also *** results showed that the boride layer of additively manufactured TC4 had a thickness of 51 pm and was composed of an outer TiB2 layer on the top of TiB layer;TiB whiskers wedged into the matrix,forming a strong bond between the boride layer and *** diffusion activation energy was determined to be 80.9 kJ/*** matrix was found to transfer from needlelikeα'martensite phase toα+βbiphasic *** newly formed boride layer can reach 1680 HV in hardness,thus imparting a strong protection to 3D-printed part.

关键词： Additive manufacturing TC4 titanium alloy Boronizing Microstructure Microhardness

肝有效血容量对肝癌术后肝功能不全的预测价值

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中国现代普通外科进展 2024年第5期27卷 373-376页

作者：陈森刘艳国张永明杨松竹烟台市烟台山医院肝胆外科山东烟台264000

目的:探讨肝有效血容量(EHBF)预测肝癌术后肝功能不全发生的价值。方法:回顾123例肝细胞癌手术患者的临床资料,测得EHBF和吲哚菁绿15 min滞留率(ICG R15),并行Child-Pugh评分,观察患者术后肝功能恢复情况。比较不同肝功恢复组中ICG R15... 详细信息

目的:探讨肝有效血容量(EHBF)预测肝癌术后肝功能不全发生的价值。方法:回顾123例肝细胞癌手术患者的临床资料,测得EHBF和吲哚菁绿15 min滞留率(ICG R15),并行Child-Pugh评分,观察患者术后肝功能恢复情况。比较不同肝功恢复组中ICG R15、EHBF差异及ICG R15、EHBF不同分组中术后肝功能不全的发生率。通过受试者工作特征(ROC)曲线比较ICG R15、EHBF诊断价值。结果:123例患者中共有41例(33.3%)术后发生肝功能不全。肝功能良好组ICG R15平均值为(8.95±7.18)%,EHBF平均值为(1.01±0.37)L/min;肝功能不全组ICG R15平均值为(15.88±11.55)%,EHBF平均值为(0.75±0.28)L/min。两组差异均有统计学意义(P<0.05)。EHBF≥1.0 L/min组术后肝功能不全发生率13.0%,<1.0 L/min术后肝功能不全发生率45.5%,差异有统计学意义(P<0.05)。ICG R15 ROC曲线下面积0.710(95%CI:0.616~0.804),临界值为7.6,敏感度78.0%,特异度59.8%。EHBF ROC曲线下面积0.718(95%CI:0.624~0.813),临界值为0.35,敏感度73.2%,特异度70.7%。结论:EHBF可有效预测肝癌术后肝功能不全的发生,且可能与ICGR15具有相似检验效能。

关键词：肝肿瘤肝储备功能肝功能不全肝有效血容量吲哚菁绿

Linguistic landscape and its impacts on place-making in mountain destination:A case of Mogan Mountain Town of Huzhou City,China

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Journal of Mountain Science 2024年第5期21卷 1613-1629页

作者： LI Chenyan LU song LONG Cheng zhu Jiaheng School of Tourism Shanghai Normal UniversityShanghai 200034China School of Environmental and Geographical Sciences Shanghai Normal UniversityShanghai 200034China

The place and placeness are believed to be a crucial perspective for comprehending the transformative dynamics of tourist destinations in the context of globalization and the rapid development of the tourism *** the material carrier of language,linguistic landscape is an intermediary for people to endow emotions and personalities into the place,becoming an effective path for exploring the place-making in a certain *** Mountain is a famous national tourist resort,which is located in Mogan Mountain Town,Deqing County,Huzhou City,*** is a good case area for studying the relationship between linguistic landscape and placemaking in tourist *** are two theories that form the theoretical foundation of the study,namely the place and the ***,the results showed the overall style of the linguistic *** labelling(52.7%),official signs(55.3%),and standardized Chinese characters predominantly shaped the linguistic landscape,with English and other languages being ***,from the perspective of three dimensions of the geosemiotics framework,such as inscription,language preference,and placement position,we conduct a comprehensive semiotic analysis of the linguistic landscape,which encompasses diverse facets such as fonts,materials,shifts in state,text vectors,and symmetrical ***,we explore the influence of linguistic landscapes on the place-making of Mogan Mountain through the dimensions of location,locale,and sense of *** information on linguistic landscapes indicates the geographical *** linguistic landscapes play an important role in constructing the language order,nostalgic atmosphere,exotic atmosphere,and elegant and tasteful lifestyle of the public space in Mogan *** of linguistic landscapes,including tourists and residents,generate and identify with the unique sense of place in Mogan *** linguistic landscapes construct the destinati

关键词： Linguistic landscape Place-making Tourist destination Geosemiotics Place theory Place branding Mogan Mountain Town China

Geochemical modeling to aid experimental design for multiple isotope tracer studies of coupled dissolution and precipitation reaction kinetics

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Acta Geochimica 2024年第1期43卷 1-15页

作者： Mingkun Chen Peng Lu Yongchen song Chen zhu Department of Earth and Atmospheric Sciences Indiana UniversityBloomingtonIN 47405USA School of Energy and Power Engineering Dalian University of TechnologyDalian 116024China EXPEC Advanced Research Center Saudi Aramco31311 DhahranSaudi Arabia

It is a challenge to make thorough but efficient experimental designs for the coupled mineral dissolution and precipitation studies in a multi-mineral system, because it is difficult to speculate the best experimental duration, optimal sampling schedule, effects of different experimental conditions, and how to maximize the experimental outputs prior to the actual experiments. Geochemical modeling is an efficient and effective tool to assist the experimental design by virtually running all scenarios of interest for the studied system and predicting the experimental outcomes. Here we demonstrated an example of geochemical modeling assisted experimental design of coupled labradorite dissolution and calcite and clayey mineral precipitation using multiple isotope tracers. In this study, labradorite(plagioclase) was chosen as the reactant because it is both a major component and one of the most reactive minerals in basalt. Following our isotope doping studies of single minerals in the last ten years, initial solutions in the simulations were doped withmultiple isotopes(e.g., Ca and Si). Geochemical modeling results show that the use of isotope tracers gives us orders of magnitude more sensitivity than the conventional method based on concentrations and allows us to decouple dissolution and precipitation reactions at near-equilibrium condition. The simulations suggest that the precise unidirectional dissolution rates can inform us which rate laws plagioclase dissolution has followed. Calcite precipitation occurred at near-equilibrium and the multiple isotope tracer experiments would provide near-equilibrium precipitation rates, which was a challenge for the conventional concentration-based experiments. In addition, whether the precipitation of clayey phases is the rate-limiting step in some multi-mineral systems will be revealed. Overall, the modeling results of multimineral reaction kinetics will improve the understanding of the coupled dissolution–precipitation in the mu

关键词： Kinetics Feldspar Isotope doping Near-equilibrium CO_(2)sequestration Basalt

Structural and magnetic properties of micropolycrystalline cobalt thin films fabricated by direct current magnetron sputtering

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International Journal of Minerals,Metallurgy and Materials 2024年第2期31卷 384-394页

作者： Kerui song Zhou Li Mei Fang zhu Xiao Qian Lei School of Materials Science and Engineering Central South UniversityChangsha 410083China State Key Laboratory of Powder Metallurgy Central South UniversityChangsha 410083China Hunan Key Laboratory of Super-Microstructure and Ultrafast Process School of Physics and electronicsCentral South UniversityChangsha 410083China Key Laboratory of Non-Ferrous Metal Materials Science and Engineering Ministry of EducationChangsha 410083China

Pure cobalt(Co)thin films were fabricated by direct current magnetron sputtering,and the effects of sputtering power and pres-sure on the microstructure and electromagnetic properties of the films were *** the sputtering power increases from 15 to 60 W,the Co thin films transition from an amorphous to a polycrystalline state,accompanied by an increase in the intercrystal pore ***,the resistivity decreases from 276 to 99μΩ·cm,coercivity increases from 162 to 293 Oe,and in-plane magnetic aniso-tropy *** the sputtering pressure decreases from 1.6 to 0.2 Pa,grain size significantly increases,resistivity significantly de-creases,and the coercivity significantly increases(from 67 to 280 Oe),which can be attributed to the increase in defect ***-pondingly,a quantitative model for the coercivity of Co thin films was *** polycrystalline films sputtered under pressures of 0.2 and 0.4 Pa exhibit significant in-plane magnetic anisotropy,which is primarily attributable to increased microstress.

关键词： cobalt thin film magnetron sputtering microstructure electromagnetic properties