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基于“一带一路”的中俄经济关系

山西财经大学学报 2024年第S01期46卷 37-39页

作者：耿媛媛河北科技大学河北石家庄050018

在“一带一路”倡议的推动下,中俄两国新经济贸易合作已经发展到了一个新的水平。林业、能源、跨境电商等众多领域的经济贸易,都在朝着国际化方向发展,但也面临着风险与挑战。俄罗斯是亚洲主要的发展中国家,目前与我国在经贸、人文等方... 详细信息

在“一带一路”倡议的推动下,中俄两国新经济贸易合作已经发展到了一个新的水平。林业、能源、跨境电商等众多领域的经济贸易,都在朝着国际化方向发展,但也面临着风险与挑战。俄罗斯是亚洲主要的发展中国家,目前与我国在经贸、人文等方面已经建立了紧密合作的关系,新形势下如何协调各方利益关系,促进经贸合作进一步发展,是很有意义的课题。本文从农业、科技、交通和能源等角度对中俄两国经济贸易进行了深入分析,以此为基础进一步探讨了“一带一路”大环境下促进中俄两国经济贸易深化发展的策略。

关键词：一带一路中国俄国经济关系

Origin of the Disparity between the Stability of Transmutated Mix-Cation and Mix-Anion Compounds

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Chinese Physics Letters 2024年第5期41卷 53-60页

作者：野仕伟耿松源梁汉普张燮魏苏淮 Beijing Computational Science Research Center Beijing 100193China Advanced Materials Thrust Function HubHong Kong University of Science and TechnologyGuangzhou 511458China School of Materials Science and Engineering Northwestern Polytechnical UniversityXi’an 710072China

Transmutation is an efficient approach for material design. For example, ternary compound CuGaSe_(2) in chalcopyrite structure is a promising material for novel optoelectronic and thermoelectric device applications. It can be considered as formed from the binary host compound ZnSe in zinc-blende structure by cation transmutation(i.e., replacing two Zn atoms by one Cu and one Ga). While cation-transmutated materials are common, aniontransmutated ternary materials are rare, for example, Zn_(2)As Br(i.e., replacing two Se atoms by one As and one Br)is not reported. The physical origin for this puzzling disparity is unclear. In this work, we employ first-principles calculations to address this issue, and find that the distinct differences in stability between cation-transmutated(mix-cation) and anion-transmutated(mix-anion) compounds originate from their different trends of ionic radii as functions of their ionic state, i.e., for cations, the radius decreases with the increasing ionic state, whereas for anions, the radius increases with the increasing absolute ionic state. Therefore, for mix-cation compounds,the strain energy and Coulomb energy can be simultaneously optimized to make these materials stable. In contrast, for mix-anion systems, minimization of Coulomb energy will increase the strain energy, thus the system becomes unstable or less stable. Thus, the trend of decreasing strain energy and Coulomb energy is consistent in mix-cation compounds, while it is opposite in mix-anion compounds. Furthermore, the study suggests that the stability strategy for mix-anion compounds can be controlled by the ratio of ionic radii r3/r1, with a smaller ratio indicating greater stability. Our work, thus, elucidates the intrinsic stability trend of transmutated materials and provides guidelines for the design of novel ternary materials for various device applications.

关键词： stability stability ternary

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混合约简:一种可调整的覆盖码约简算法

密码学报（中英文） 2024年第4期11卷 820-829页

作者：耿致远胡红钢中国科学技术大学网络空间安全学院合肥230027

带噪声奇偶学习问题(learning parity with noise,LPN)是密码学中的一类重要困难问题,它可以视作随机线性码译码问题的一般形式,是抗量子假设中的有力候选.在求解LPN问题前,通常需要执行约简操作,将待求实例转化为秘密长度更短的实例.... 详细信息

带噪声奇偶学习问题(learning parity with noise,LPN)是密码学中的一类重要困难问题,它可以视作随机线性码译码问题的一般形式,是抗量子假设中的有力候选.在求解LPN问题前,通常需要执行约简操作,将待求实例转化为秘密长度更短的实例.本文提出了一种新的混合约简算法Hybrid,它将经典的丢弃约简算法和覆盖码约简算法相结合,在约简过程中丢弃与码字距离超过给定界限的LPN样本,而非将所有样本直接近似到码字.这种新的约简方法可以到达权衡样本复杂度和时间复杂度的目的.从算法层面讲,丢弃约简与覆盖码约简可以视作混合约简的特例.最后,使用池化高斯算法求解经过混合约简后的LPN样本,给出了其完整的理论复杂度.数值估计的结果表明混合约简可以进一步缩减良好池化高斯算法(Well-Pooled Gauss)的样本复杂度,但需要以时间开销上升为代价.

关键词：带噪声奇偶学习丢弃约简算法覆盖码约简算法池化高斯算法

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考虑学习效应和能源消耗的并行机调度研究

机械设计与制造 2024年第9期 130-135页

作者：耿瑗璐杨玉中河南理工大学能源科学与工程学院河南焦作454000

学习效应广泛存在于车间生产,基于学习效应的车间调度优化准确度更高。运用理论分析和遗传算法对并行机调度问题进行了研究。构建了以最大完工时间和能耗最小为优化目标的多目标并行机调度模型,设计了一种基于贪婪解码算法的第二代非支... 详细信息

学习效应广泛存在于车间生产,基于学习效应的车间调度优化准确度更高。运用理论分析和遗传算法对并行机调度问题进行了研究。构建了以最大完工时间和能耗最小为优化目标的多目标并行机调度模型,设计了一种基于贪婪解码算法的第二代非支配排序遗传算法。基于工序和机器进行双层实数编码,解码过程插入贪婪算法,基于工件工序号,得到该道工序在当前设备中待加工序号及当前设备存在的加工间隙,在设备间隙矩阵中判断工件工序可插入的位置,进而更新开始及完工时间与机器能耗使用情况。通过数值算例验证了模型及算法的有效性。

关键词：并行机调度 NSGA-Ⅱ 贪婪算法学习效应最小能耗

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冠心病心力衰竭并发肾衰竭的风险预测

安徽医药 2024年第8期28卷 1617-1623页

作者：张晓慧刘丽耿玉安河南省直第三人民医院心血管内科河南郑州450006 河南省直第三人民医院肾内科河南郑州450006 河南省直第三人民医院重症医学科河南郑州450006

目的探讨冠心病心力衰竭并发肾衰竭的风险因素,据此构建多重logistic回归模型。方法回顾性分析2018年9月至2022年7月河南省直第三人民医院收治的478例冠心病心力衰竭病人的临床资料,按照7∶3的比例将其分为建模组(n=335)与验证组(n=143... 详细信息

目的探讨冠心病心力衰竭并发肾衰竭的风险因素,据此构建多重logistic回归模型。方法回顾性分析2018年9月至2022年7月河南省直第三人民医院收治的478例冠心病心力衰竭病人的临床资料,按照7∶3的比例将其分为建模组(n=335)与验证组(n=143)。根据肾衰竭并发情况又将建模组病人进一步分为并发组与未并发组,采用单因素及多因素logistic回归分析法分析建模组冠心病心力衰竭病人并发肾衰竭的风险因素,并建立多重logistic回归模型。采用受试者操作特征曲线(ROC曲线)、Hosmer-Lemeshow拟合优度检验、决策曲线(DCA)对模型进行内外部检验。结果478例冠心病心力衰竭病人中有113例并发肾衰竭(23.64%),建模组335例病人中有86例并发肾衰竭(24.48%),验证组143例病人中有31例并发肾衰竭(21.68%);并发组年龄≥60岁、美国纽约心脏病协会(NYHA)心功能分级Ⅳ级、原发性高血压史、糖尿病史、心房颤动史、利尿剂服用、左室后壁厚度(LVPWT)>11 mm、左室射血分数(LVEF)≤45%、血尿素氮(BUN)>6 mmol/L、血肌酐(Scr)>133μmol/L、血尿酸>420μmol/L、胱抑素C(CysC)>1.10 mg/L、N末端B型利钠肽前体(NT-proBNP)>3000 ng/L、血红蛋白(Hb)6 mmol/L、Scr>133μmol/L、CysC>1.10 mg/L、Hb6 mmol/L、Scr>133μmol/L、CysC>1.10 mg/L、Hb<110 g/L均是冠心病心力衰竭病人并发肾衰竭的危险因素,根据此结果而建立的风险预测logistic回归模型具有较好的预测价值,能够帮助临床工作者早期筛选并发肾衰竭的高风险人群,以便及时予以干预,降低肾衰竭发生率。

关键词：冠心病心力衰竭肾衰竭风险因素

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Theoretical Studies on Reaction Pathways of Samarium（Ⅱ） Carbenoid Promoteded Cyclopropanation Reaction of Ethylene

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Chinese Journal of Chemical Physics 2006年第1期19卷 69-75页

作者： Zhi-yuan geng Xing-hui Zhang Yong-cheng Wang Ran Fang Li-guo Gao Xiao-xia Chen Cun-yuan Zhao College of Chemistry and Chemical Engineering Gansu Province Key Laboratory of Polymer MaterialsNorthwest Normal University Lanzhou 730070 China

In order to have efficient and highly stereoselective cyclopropanating reagents, the cyclopropabation reaction of ethylene promoted with Samarium（Ⅱ） carbenoid [Simmons-Smith（SS）reagent] were studied by means of B3LYP hybrid density functional method. The geometries for reactants, transition states and products are completely optimized. All transition states were verified by the vibrational analysis and the intrinsic reaction coordinate （IRC） calculations. The results showed that, identical with the lithium carbenoid, CH3SmCH2X（X=Cl, Br and Ⅰ） can fairly react with ethylene via both methylene transfer pathway （pathway A） and carbometalation pathway （pathway B）. And the cyclopropanation reaction via methylene transfer pathway proceeds with a lower barrier and at lower temperatures.

关键词： Samarium carbenoid Cyclopropanation Simmons-Smith reaction Density functional theory

An Interpretable CNN for the Segmentation of the Left Ventricle in Cardiac MRI by Real-Time Visualization

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Computer Modeling in Engineering & Sciences 2023年第5期135卷 1571-1587页

作者： Jun Liu geng yuan Changdi Yang Houbing Song Liang Luo Robotics Institute School of Computer ScienceCarnegie Mellon UniversityPittsburghPA15217USA Department of Electrical&Computer Engineering College of EngineeringNortheastern UniversityBostonMA02115USA Security and Optimization for Networked Globe Laboratory(SONG Lab) Embry-Riddle Aeronautical UniversityDaytona BeachFL32114USA School of Computer Science and Engineering University of Electronic Science and Technology of ChinaChengdu610054China

The interpretability of deep learning models has emerged as a compelling area in artificial intelligence *** safety criteria for medical imaging are highly stringent,and models are required for an ***,existing convolutional neural network solutions for left ventricular segmentation are viewed in terms of inputs and ***,the interpretability of CNNs has come into the *** medical imaging data are limited,many methods to fine-tune medical imaging models that are popular in transfer models have been built using massive public Image Net datasets by the transfer learning ***,this generates many unreliable parameters and makes it difficult to generate plausible explanations from these *** this study,we trained from scratch rather than relying on transfer learning,creating a novel interpretable approach for autonomously segmenting the left ventricle with a cardiac *** enhanced GPU training system implemented interpretable global average pooling for graphics using deep *** deep learning tasks were *** included data management,neural network architecture,and *** system monitored and analyzed the gradient changes of different layers with dynamic visualizations in real-time and selected the optimal deployment *** results demonstrated that the proposed method was feasible and efficient:the Dice coefficient reached 94.48%,and the accuracy reached 99.7%.It was found that no current transfer learning models could perform comparably to the ImageNet transfer learning *** model is lightweight and more convenient to deploy on mobile devices than transfer learning models.

关键词： Interpretable graphics training visualization image segmentation left ventricle CNNs global average pooling

Theoretical Studies on the Intermonomer Interaction of F^(-)·(H_(2)O)_(n)(n=1,2)

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Chinese Journal of Structural Chemistry 2005年第5期24卷 561-567,491页

作者： WANG Yong-Cheng LüLing-Ling geng Zhi-yuan DAI Guo-Liang WANG Dong-Mei Department of Chemistry Northwest Normal UniversityLanzhou 730070China Department of Chemistry Tianshui Normal UniversityGansu 741009China

Five optimized geometries of F-?(H2O)n (n = 1, 2) were obtained with ab initio calculation at the B3LYP/6-311++G** level. The accurate intermonomer interaction energy was calculated using the MP2 electron correlation correction as well as the basis set superposition error correction by the Boys-Bernardi “counterpoise” protocol. Natural bond orbital (NBO) theory was applied to quantify the relative strength of these interactions and account for their effects on the stability, structural and vibrational parameters of Fˉ?(H2O)n (n = 1, 2). It is shown that the charge transferring from the lone pair of F-1 to the σ?OH(…F) antibonding orbital is important. The results indicate the occupancy of σ?OH(…F) is increased (denoted ?σ?OH(…F)) and the σOH(…F) bond is leng- thened (denoted ?ROH(…F)), leading to the red-shift and the red-shift values have linear correlation with both ?σ?OH(…F) and ?ROH(…F).

关键词： F^(-)·(H_(2)O)_(n)(n=1,2) interaction energy red-shift linear correlation

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一种有效测量游离透明质酸钠含量的方法

江西化工 2024年第1期40卷 23-26页

作者：朱吉王娜耿袁顾颖涛石磊江苏医路通检验检测技术服务有限公司江苏张家港215600

建立了紫外分光光度法测试游离透明质酸钠含量的方法。由于游离透明质酸钠易溶于水,因此其应用受到限制,而采用交联剂合成的交联透明质酸钠,克服了天然透明质酸钠的缺陷,但是难于在水溶液中分散,需要溶解后才能将交联网络中的其他水溶... 详细信息

建立了紫外分光光度法测试游离透明质酸钠含量的方法。由于游离透明质酸钠易溶于水,因此其应用受到限制,而采用交联剂合成的交联透明质酸钠,克服了天然透明质酸钠的缺陷,但是难于在水溶液中分散,需要溶解后才能将交联网络中的其他水溶性物质释放出来,从而导致游离透明质酸钠含量的测量有效性降低。在已有研究方法的基础上,通过改变溶解方式和过滤模式,大大改进了测量结果。在0~50μg/mL范围内,样品管中透明质酸钠含量与吸光度的线性较好,相关系数为0.99982;最低检测限为0.008μg/mL;定量限为0.025μg/mL;精密度测试,RSD为0.02%(n=10);重复性测试,RSD为4.3%(n=10);平均加标回收率为94%(n=10)。该测量方法具有准确度高、稳定性好、灵敏度高、重复性好等优点,专属性和适用性更强,可用于测量各种类型的交联透明质酸钠凝胶产品中的游离透明质酸钠含量。

关键词：透明质酸钠交联透明质酸钠游离透明质酸钠交联剂紫外分光光度计回收率