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Nomogram for predicting overall survival time of patients with stageⅣcolorectal cancer

Gastroenterology Report 2022年第1期10卷 575-584页

作者： Min-Yi Lv Xi-jie Chen Jun-Guo Chen Bin Zhang Yan-Yun Lin Tian-Ze Huang De-Gao He Kai Wang zeng-jie chi Jian-Cong Hu Xiao-Sheng He Department of Colorectal Surgery The Sixth Affiliated HospitalSun Yat-sen UniversityGuangzhouGuangdongP.R.China Guangdong Institute of Gastroenterology GuangzhouGuangdongP.R.China Department of Colorectal Surgery Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor DiseasesThe Sixth Affiliated HospitalSun Yat-sen UniversityGuangzhouGuangdongP.R.China

Background Prognosis varies among stageⅣcolorectal cancer(CRC).Our study aimed to build a robust prognostic nomogram for predicting overall survival(OS)of patients with stageⅣCRC in order to provide evidence for individualized *** We collected the information of 16,283 patients with stageⅣCRC in the Surveillance,Epidemiology,and End Results(SEER)database and then randomized these patients in a ratio of 7:3 into a training cohort and an internal validation *** addition,501 patients in the Sixth Affiliated Hospital of Sun Yat-sen University(Guangzhou,china)database were selected and used as an external validation *** and multivariate Cox analyses were used to screen out significant variables for nomogram *** nomogram model was assessed using time-dependent receiveroperating characteristic curve(time-dependent ROC),concordance index(C-index),calibration curve,and decision curve *** curves were plotted using the Kaplan–Meier *** The C-index of the nomogram for OS in the training,internal validation,and external validation cohorts were 0.737,0.727,and 0.655,*** analysis and calibration curves pronounced robust discriminative ability of the ***,we divided the patients into a high-risk group and a low-risk group according to the *** Kaplan–Meier curves showed that the prediction of the nomogramwas consistent with the actual ***,model comparisons and decision curve analysis proved that the nomogram for predicting prognosis was significantly superior to the tumor-node-metastasis(TNM)staging *** We constructed a nomogram to predict OS of the stageⅣCRC and externally validate its generalization,which was superior to the TNM staging system.

关键词： stageⅣCRC nomogram overall survival prognosis SEER

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大型光伏电站角形级联STATCOM电压控制策略

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电力自动化设备 2017年第3期37卷 55-60页

作者：谢宁陈晓科徐晓刚曾杰张弛楚烺广东电网有限责任公司电力科学研究院广东省智能电网新技术企业重点实验室广东广州510080 广州供电局有限公司广东广州511450

大型光伏电站并网后,给配电网乃至输电网的电压、电能质量等带来一系列的影响。静止同步补偿器(STATCOM)可稳定公共连接点电压并提高分布式电源的低电压穿越能力。提出了一种适用于大型光伏电站角形级联STATCOM的电压控制策略,能够支撑... 详细信息

大型光伏电站并网后,给配电网乃至输电网的电压、电能质量等带来一系列的影响。静止同步补偿器(STATCOM)可稳定公共连接点电压并提高分布式电源的低电压穿越能力。提出了一种适用于大型光伏电站角形级联STATCOM的电压控制策略,能够支撑电网正序电压,减少公共连接点电压波动,并抑制公共连接点负序电压,改善电网电压不平衡;再结合角形级联STATCOM相电流与线电压的约束关系,给出了角形级联STATCOM相电流指令获取方法;最后,在PSCAD中搭建仿真模型验证了所提控制方法的正确性和有效性。

关键词：大型光伏电站角形级联STATCOM 电压控制不平衡电压指令计算零序环流

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求解0·∞型极限的方法分析

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滇西科技师范学院学报 2019年第4期28卷 116-121页

作者：曾赤洁滇西科技师范学院数理学院

0·∞型极限是一种常见的待定型极限,洛必达法则是计算这种待定型极限的有效方法。在应用洛必达法则之前,必须把0·∞型变形成0/0型或∞/∞型。文章通过大量典型例题的分析,推导出计算0·∞型极限的方法,应用这些方法能快速而方便地求出... 详细信息

0·∞型极限是一种常见的待定型极限,洛必达法则是计算这种待定型极限的有效方法。在应用洛必达法则之前,必须把0·∞型变形成0/0型或∞/∞型。文章通过大量典型例题的分析,推导出计算0·∞型极限的方法,应用这些方法能快速而方便地求出0·∞型的极限。

关键词： 0·∞型极限待定型极限洛必达法则

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模糊综合评价在学生思想品德评判中的应用

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甘肃联合大学学报（自然科学版） 2011年第4期25卷 35-36页

作者：曾赤洁临沧师范高等专科学校数理系云南临沧677000

在对大学生进行综合素质测评时,思想品德评判是其中很重要的一项内容.本文应用模糊数学的综合评价法对学生的思想品德进行了评价,给出了一种有效的量化评估方法,为进一步进行综合素质测评打下基础.

关键词：思想品德模糊评价主要因素

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QF-拓扑群的进一步研究

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红河学院学报 2008年第5期6卷 29-31页

作者：曾赤洁张振良临沧师范高等专科学校数理系云南临沧677000 昆明理工大学理学院昆明650093

文献[3]提出了QF-拓扑群的概念,在文献[3]的基础上对QF-拓扑群进行了进一步的研究.首先用重域定义了Q截集,并研究了Q截集的性质;其次在Fuzzy拓扑空间中定义了QF-拓扑群的Q-紧,并研究了Q-紧性.

关键词： QF-拓扑群 Q截集 Q-紧

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Influence of SAM Quality on the Organic Semiconductor Thin Film Gas Sensors

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Chemical Research in chinese Universities 2022年第2期38卷 510-515页

作者： ZHU Lunan WANG Zi LU jie ZHOU Xu zeng Zhoufang HUANG Lizhen chi Lifeng Institute of Functional Nano&Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-based Functional Materials&DevicesSoochow UniversitySuzhou215123P.R.China Research and Development Center for Genetics Resource Chinese Aca-demy of SciencesChangzhou 213000P.R.China

Gas sensors based on organic semiconductors receive tremendous attentions owing to their advantages on high selectivity and room temperature operation. However, until now, most organic semiconductor based sensors still suffered from problems, such as low sensitivity, slow response/recovery speed and poor stability. In addition, a clear correlation between the sensing performance and the film property is still absent. Herein, we report the investigation on sensing performance of a series of organic films with various morphologies. By simply adjusting the quality of self-assembled monolayer(SAM) on the silicon wafer surface, we obtain organic semiconductor 6,13-bis(triisopropylsilylethynyl)pentacene (TIPS-pentacene) films with varied morphologies and different charge transport abilities. The film with a small grain size and a continuous morphology presents the highest sensing performance to NO2, with a sensitivity up to 730%/ppm(ppm=parts per million, vo-lume ratio). We thus reveal that the high sensitivity of the organic film is evident related with the charge transport ability and initial conductivity of the films, as well as the morphologies of both modification layer and the active films.

关键词： Self-assembled monolayer Gas sensor Organic semiconductor Thin film growth

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A modern survey method for determining live loads based on multi-source and open-access data on the Internet

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Frontiers of Structural and Civil Engineering 2024年第8期18卷 1135-1147页

作者： chi XU Jun CHEN jie LI School of Civil Engineering Tongji UniversityShanghai 200092China The State Key Laboratory on Disaster Reduction in Civil Engineering Tongji UniversityShanghai 200092China

Sufficient survey data are required to describe the stochastic behaviors of live ***,due to manual and on-site operation required by traditional survey methods,traditional surveys face challenges like occupant resistance,high costs,and long implementation *** study proposes a new survey method to access live load data online and *** samples are acquired from multi-source,open-access and dynamically updated data on the *** change intervals,geometrical dimensions and object quantities are obtained from transaction information,building attributes and virtual reality models on real estate websites,*** object weights are collected from commodity information on e-commerce *** integration of the aforementioned data allows for the extraction of necessary statistics to describe a live load *** proposed method is applied to a live load survey in china,covering 20040 m^(2),with around 90000 samples acquired for object weights and load *** survey results reveal that about 70%−80%of the amplitude statistics are attributable to 1/6 of the total object types.

关键词： live load online survey method data acquisition data integration

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Impacts of Salinity and Nitrogen on the Photosynthetic Rate and Growth of Sunflowers(Helianthus annuus L.)

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Pedosphere 2014年第5期24卷 635-644页

作者： zeng Wen-Zhi XU chi WU Jing-Wei HUANG jie-Sheng ZHAO Qiang WU Mou-Song State Key Laboratory of Water Resources and Hydropower Engineering Science Wuhan University

Understanding the interactions between salinity and fertilizers is of significant importance for enhancing crop yield and fertilizeruse efficiency. In this study a complete block design experiment was performed in the Hetao Irrigation District of Inner Mongolia,china, to evaluate the effects of interactions between soil salinity and nitrogen(N) application rate on sunflower photosynthesis and growth and to determine the optimum N application rate for sunflower growth in the district. Four levels of soil salinity expressed as electrical conductivity(0.33–0.60, 0.60–1.22, 1.2–2.44, and 2.44–3.95 dS m-1) and three application rates of N fertilization(90, 135,and 180 kg ha-1) were applied to 36 micro-plots. Soil salinity inhibited the photosynthetic rate, stomatal conductance, transpiration rate, plant height, leaf area, and aboveground dry matter of sunflowers. The intercellular CO2 concentration first decreased and then increased with increasing soil salinity in the seedling stage, and the instantaneous leaf water-use efficiency fluctuated with soil salinity. The stomatal and non-stomatal limitations of sunflowers alternated in the seedling stage; however, in the bud, blooming,and mature stages, the stomatal limitation was prevalent when the salinity level was lower than 2.44 dS m-1, whereas the nonstomatal limitation was predominant above the salinity level. The application of N fertilizer alleviated the adverse effects of salinity on sunflower photosynthesis and growth to some extent. During some key growth periods, such as the seedling and bud stages, a moderate N application rate(135 kg ha-1) resulted in the maximum photosynthetic rate and yielded the maximum dry matter. We suggest a moderate N application rate(135 kg ha-1) for the Hetao Irrigation District and other sunflower-growing areas with similar ecological conditions.

关键词： non-stomatal limitation N-use efficiency optimum N application rate soil salinization stomatal limitation

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Adsorption of lead on multi-walled carbon nanotubes with different outer diameters and oxygen contents: Kinetics, isotherms and thermodynamics

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Journal of Environmental Sciences 2013年第1期25卷 195-203页

作者： Fei Yu Yanqing Wu jie Ma chi Zhang School of Environmental Science and Engineering Shanghai Jiao Tong University State Key Laboratory of Pollution Control and Resource Reuse School of Environmental Science and EngineeringTongji University

The effects of different outer diameters and surface oxygen contents on the adsorption of heavy metals onto six types of multi-walled carbon nanotubes （MWCNTs） were investigated in an aqueous solution and lead was chosen as a model metal ion. The results indicated that the percentage removal and adsorption capacity of lead remarkably increased with decreasing outer diameter due to larger specific surface area （SSA）. The SSA-normalized maximum adsorption capacity （qJSSA） and SSA-normalized adsorption coefficient （KdSSA） were strongly positively correlated with surface oxygen content, implying that lead adsorption onto MWCNTs significantly increases with the rise of oxygen content and decreases with decreasing SSA. The calculated thermodynamic parameters indicated that adsorption of lead on MWCNTs was endothermic and spontaneous. When the oxygen content of MWCNTs increased from 2.0% to 5.9%, the standard free energy （AGt） became more negative, which implied that the oxygenated functional groups increased the adsorption affinity of MWCNTs for lead. Through calculation of enthalpy （△H0）, AGO and free energy of adsorption （Ea）, lead adsorption onto MWCNTs was recognized as a chemisorption process. The chemical interaction between lead and the phenolic groups of MWCNTs could be one of the main adsorption mechanisms due to highly positive correlations between the phenolic groups and Kd/SSA or qm/SSA.

关键词： adsorption lead multi-walled carbon nanotube diameter surface oxygen content

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Study of thermo-fluidic characteristics for geometric-anisotropy Kagome truss-cored lattice

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chinese Journal of Aeronautics 2019年第7期32卷 1635-1645页

作者： chi HOU Guangmeng YANG Xiaopeng WAN jie CHEN School of Aeronautics Northwestern Polytechnical University

The aim of this paper is to provide a comprehensive comparison of the thermal insulation and heat transfer performance for Kagome truss-cored lattice along two perpendicular orientations OA and OB. Three test conditions are conducted under forced air convection for the titanium sandwich panel fabricated by 3 D printing technology. The thermo-fluidic characteristics are further explored by numerical simulation to reveal the underlying mechanisms of heat transfer *** results indicate that the orientation OB exhibits better thermal insulation than orientation OA under the identical temperature loading, while the latter outperforms the former by up to 20% higher overall heat transfer performance. In particular, the endwalls and lattice core in orientation OA achieve 9.7% and 22.5% higher area-averaged Nusselt number respectively than that in orientation OB for a given Reynolds number. The heat transfer superiority of orientation OA comes from the unique topology which induces the large scale spiral primary flows, facilitating the heat exchange between the cooling air and the surfaces of sandwich panel. However, the complex flow mixing leads to a maximum of 20% higher friction factor in orientation OA than that in orientation OB.

关键词： Forced convection Heat transfer Kagome Pressure drop Topology direction

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