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World Journal of Gastrointestinal Oncology 2025年第1期17卷 143-157页

作者： Xian-Rang Cao yin-Long xu Jia-Wei Chai Kai Zheng Jun-Jie Kong Jun Liu Shun-Zhen Zheng Department of Liver Transplantation and Hepatobiliary Surgery Shandong Provincial Hospital Affiliated to Shandong First Medical UniversityJinan 250021Shandong ProvinceChina Department of Breast and Thyroid Surgery Shandong Provincial Maternal and Child Health Care HospitalJinan 250014Shandong ProvinceChina

BACKGROUND Red blood cell distribution width(RDW)is associated with the development and progression of various *** To explore the association between pretreatment RDW and short-term outcomes after laparoscopic pancreatoduodenectomy(LPD).METHODS A total of 804 consecutive patients who underwent LPD at our hospital between March 2017 and November 2021 were retrospectively *** between pretreatment RDW and clinicopathological characteristics and short-term outcomes were *** Patients with higher pretreatment RDW were older,had higher Eastern Cooperative Oncology Group scores and were associated with poorer short-term outcomes than those with normal *** pretreatment RDW was an independent risk factor for postoperative complications(POCs)(hazard ratio=2.973,95%confidence interval:2.032-4.350,Pying patients who were at high risk of developing POCs after LPD.

关键词： Biomarker Laparoscopic pancreatoduodenectomy Postoperative complication Red blood cell distribution width Short-term outcomes

极端事件下基于频率响应降阶模型的城市局部电网离网过程紧急频率控制

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电网技术 2025年第2期49卷 427-436,I0001-I0005页

作者：武阿涛许寅吴翔宇北京交通大学电气工程学院北京市海淀区100044

极端事件可能导致城市局部电网与上级电网断开进入孤岛,在离网瞬间较大的有功功率缺额使得维持城市局部电网的频率安全成为难点。提出一种极端事件下基于频率响应降阶模型的城市局部电网离网过程紧急频率控制方法。首先,基于平衡截断降... 详细信息

极端事件可能导致城市局部电网与上级电网断开进入孤岛,在离网瞬间较大的有功功率缺额使得维持城市局部电网的频率安全成为难点。提出一种极端事件下基于频率响应降阶模型的城市局部电网离网过程紧急频率控制方法。首先,基于平衡截断降阶方法,通过提取频率响应关键特征量,建立了计及分布式资源聚合体的城市局部电网降阶频率响应模型。然后,提出了城市局部电网离网过程紧急频率控制的两阶段决策方法,第1阶段在保证频率不越界的情况下,对快速功率控制资源控制量进行求解,第2阶段依据资源可靠度优先排序对分布式资源聚合体整体功率指令值进行快速分解。最后,基于典型城市局部电网算例验证了所提模型和方法的准确性与有效性。

关键词：城市局部电网频率响应建模模型降阶分布式资源聚合体紧急频率控制

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S空位及非金属掺杂单层Bi_(2)S_(2)Se的第一性原理研究

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原子与分子物理学报 2025年第1期42卷 127-134页

作者：张建华王敏陈畅曹倩徐银湖北大学资源环境学院武汉430062

Bi_(2)S_(2)Se是一种新兴的具有优异光电性能的材料,因此受到了广泛的关注.本研究采用第一性原理方法和开源程序,研究了本征单层Bi_(2)S_(2)Se以及掺杂非金属元素X(X=P,Cl,Br和I)和S空位的体系的电子结构和光学特性.计算结果表明,改性... 详细信息

Bi_(2)S_(2)Se是一种新兴的具有优异光电性能的材料,因此受到了广泛的关注.本研究采用第一性原理方法和开源程序,研究了本征单层Bi_(2)S_(2)Se以及掺杂非金属元素X(X=P,Cl,Br和I)和S空位的体系的电子结构和光学特性.计算结果表明,改性后出现了晶格缺陷.含S空位和P、Cl、Br掺杂体系的带隙减少,而I掺杂体系的带隙增加.同时,含S空位和Cl、Br、I掺杂体系的费米能级穿过导带底,而P掺杂体系的费米能级穿过价带顶.所有改性体系在费米能级附近都出现了缺陷能级或杂质能级,表现出较高的可见光吸收能力和散射能力,改性体系的对可见光的吸收能力和散射能力有所增加.

关键词： Bi_(2)S_(2)Se 掺杂电子结构光学性质第一性原理

A HYBRID EXPLICIT-IMPLICIT SCHEME FOR THE TIME-DEPENDENT WIGNER EQUATION

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Journal of Computational Mathematics 2021年第1期39卷 22-42页

作者： Haiyan Jiang Tiao Lu xu yin Department of Mathematics and Statistics Beijing Institute of TechnologyBeiing 100081China CAPT HEDPSLMAMIFSA Collaborative Innovation Center of MoESchool of Mathematical SciencesPeking UniversityBeijing 100871China Department of Mathematics and Statistics Beijing Institute of TechnologyBeijing 100081China

This paper designs a hybrid scheme based on finite difference methods and a spectral method for the time-dependent Wigner equation,and gives the error analysis for the full discret ization of its initial value *** explicit-implicit time-splitting scheme is used for time integration and the second-order upwind finite difference scheme is used to dis-cretize the advection *** consistence error and the stability of the full discretization are analyzed.A Fourier spectral method is used to approximate the pseudo-differential operator term and the corresponding error is studied in *** final convergence result shows clearly how the regularity of the solution affects the convergence order of the pro-posed scheme.N umerical results are presented for confirming the sharpness of the *** scattering effects of a Gaussian wave packet tunneling through a Gaussian potential barrier are *** evolution of the density function shows that a larger portion of the wave is reflected when the height and the width of the barrier *** subject classification:65M06,65M70.

关键词： Finite diference method Spectral method Hybrid scheme Error analysis Wigner equation.

Synthesis and properties of ionic conduction polymer for anodic bonding

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Chinese Chemical Letters 2015年第3期26卷 289-292页

作者： xu yin Cui-Rong Liu Tai Yuan University of Science and Technology

In this study,powders of polyethylene oxide（PEO） and lithium perchlorate（Li Cl O4） were used as the raw materials for producing the ionic conduction polymer PEO–Li Cl O4 with different complex-ratios and used for anodic bonding through high energy ball milling method,and meanwhile,X-ray diffraction,differential scanning calorimetry（DSC）,ultraviolet absorption spectrum test analysis,and other relevant methods were adopted to research the complexation mechanism of PEO and Li Cl O4 and the impact of the ionic conduction polymer with different complex-ratios on the anodic bonding process under the action of the strong static electric *** research results showed that the crystallization of PEO could be effectively obstructed with increased addition of Li Cl O4,thus increasing the content of PEO–Li Cl O4 in amorphous area and continuously improving the complexation degree and the room-temperature conductivity thereof,and that the higher room-temperature conductivity enabled PEO–Li Cl O4 to better bond with metallic aluminum and have better bonding *** the new encapsulating material,such research results will promote the application of new polymer functional materials in micro-electromechanical system（MEMS） components.

关键词： anodic conduction bonding ionic ultraviolet metallic amorphous calorimetry milling encapsulation

寒潮天气下考虑电动汽车参与灵活调节的电网优化调度方法

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电力系统自动化 2025年第4期49卷 116-127页

作者：焦治杰许寅刘曌王小君和敬涵司方远北京交通大学电气工程学院北京市100044

寒潮来临引发天气温度突发性骤降,此时负荷的用能增加、新能源的出力锐减以及系统备用和上级电网的供电能力不足,导致电网内部短时间内出现较大的电力缺额问题。随着负荷侧电动汽车基数的增加及灵活性资源需求响应能力的提升,调节负荷... 详细信息

寒潮来临引发天气温度突发性骤降,此时负荷的用能增加、新能源的出力锐减以及系统备用和上级电网的供电能力不足,导致电网内部短时间内出现较大的电力缺额问题。随着负荷侧电动汽车基数的增加及灵活性资源需求响应能力的提升,调节负荷侧灵活性资源以弥补寒潮引起的电力缺额具备可行性。文中首先明确了资源的灵活性属性随场景的变化而变化,挖掘并构建了寒潮来临时电动汽车等灵活性资源的模型;其次,考虑到灵活性资源中的电动汽车需要通过聚合来参与电网调度,构建了考虑电动汽车联网时间不确定性的电动汽车聚合方法;然后,基于寒潮来临时的灵活性资源、非民生类负荷和民生类负荷,提出了以社会损失最小为目标的寒潮天气电网滚动优化调度方法,得出电网中各资源在寒潮天气下的用电调整量;最后,通过算例验证了所提方法能够有效应对寒潮来临时电网的电力缺额问题。

关键词：灵活性资源电动汽车寒潮优化调度车网互动

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Precise Control of Self-assembly in vivo Based on Polymer-Peptide Conjugates

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Chinese Journal of Chemistry 2022年第23期40卷 2815-2824页

作者： yin-Sheng xu Hao Wang Zeng-ying Qiao CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety CAS Center for Excellence in NanoscienceNational Center for Nanoscience and Technology(NCNST)Center of Materials Science and Optoelectronics EngineeringUniversity of Chinese Academy of SciencesBeijing 100190China

The self-assembled nanomaterials based on peptides,which have not only good biocompatibility and low toxicity but also high stability and performance,are increasingly becoming an important way for cancer *** this review,we highlight the progress of in vivo self-assembled polymer-peptide conjugates(PPCs)and their application,showing the recent advances in the development of“in vivo self-assembly”strategy for cancer *** the diverse microenvironments of tumor cells,different responsive assembly strategies(enzyme,pH,redox,temperature,etc.)have been developed to precisely control the assembly at different biological levels,realizing enhanced drug delivery and improved anticancer efficacy.

关键词： Polymer-peptide conjugates Drug design In vivo self-assembly Drug delivery Antitumor agents

Optimization of Distributed Integrated Multi-energy System Considering Industrial Process Based on Energy Hub

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Journal of Modern Power Systems and Clean Energy 2020年第5期8卷 863-873页

作者： Yizhi Zhang Xiaojun Wang Jinghan He yin xu Wei Pei IEEE School of Electrical Engineering Beijing Jiaotong UniversityBeijing 100044China Institute of Electrical Engineering Chinese Academy of SciencesBeijing 100190China

As a typical scenario of distributed integrated multi-energy system(DIMS),industrial park contains complex production constraints and strong associations between industrial productions and energy *** industrial production process(IPP)consists of controllable subtasks and strict timing *** IPP as a control variable of optimal scheduling,it is an available approach that models the IPP as material flow into an extension energy hub(EH)to achieve the optimization of industrial *** this paper,considering the coupling between the production process and energy demands,a model of IPP is proposed by dividing the process into different adjustable steps,including continuous subtask,discrete subtask,and storage ***,a transport model of material flow is used to describe the IPP in an industrial park *** on the concept of EH,a universal extension EH model is proposed considering the coupling among electricity,heat,cooling,and ***,an optimal scheduling method for industrial park DIMS is proposed to improve the energy efficiency and operation ***,a case study of a typical battery factory is shown to illustrate the proposed *** simulation results demonstrate that such a method reduces the operation cost and accurately reflects the operation state of the industrial factory.

关键词： Distributed integrated multi-energy system(DIMS) industrial production process(IPP) energy hub(EH) optimal operation battery production

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煤基石墨负极材料的制备及其电化学性能研究

现代化工 2025年第1期45卷 123-130页

作者：郭日凯霍雨乔文明余子舰张寅旭华东理工大学化学工程联合国家重点实验室上海200237 合盛硅业(鄯善)有限公司新疆吐鲁番838200

以无烟煤为前驱体,研究了煤化程度、灰分、石墨化温度等对无烟煤石墨化的影响机制以及煤基石墨微观结构与电化学性能之间的“构效”关系。结果表明,煤化程度高的无烟煤有利于煤基石墨的微晶生长,在相同温度下能够达到更高的石墨化程度... 详细信息

以无烟煤为前驱体,研究了煤化程度、灰分、石墨化温度等对无烟煤石墨化的影响机制以及煤基石墨微观结构与电化学性能之间的“构效”关系。结果表明,煤化程度高的无烟煤有利于煤基石墨的微晶生长,在相同温度下能够达到更高的石墨化程度。太西煤在2400℃石墨化后,石墨化度为80.3%,而晋城煤石墨化度仅为74.5%。无烟煤中的灰分有催化石墨化作用,未脱灰样品在低温下石墨化程度较高,具有较高的首次充放电容量;同时灰分的存在会影响煤基石墨的片层结构,使石墨片层存在褶皱,导致煤基石墨的循环稳定性和倍率性能下降。煤基石墨的石墨化度随温度升高而增加,石墨片层结构逐渐发展,电化学性能得到明显提升。脱灰太西煤经2800℃石墨化处理后所得煤基石墨在0.2 C的首次放电容量达370.8 mAh/g。

关键词：煤基石墨无烟煤石墨化锂离子电池电化学性能

Flat-end tool orientation based on rotation-minimizing frame

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Advances in Manufacturing 2019年第3期7卷 257-269页

作者： Xiang Zou Hon-Yuen Tam Hai-yin xu Ke Shi School of Computer Science and Technology Huazhong University of Science and TechnologyWuhan 430074People's Republic of China College of Science and Engineering Department of Mechanical EngineeringCity University of Hong KongHong KongPeople's Republic of China

Well-designed tool orientation is crucial for the quality execution of five-axis machining with flat-end *** orientation can be specified in terms of tool inclination and tool tilt *** a given surface path,these aspects need to be specified for each cutter contact point along the path,because poor tool orientation choice can cause large axial acceleration of the machine tool,leading to inferior quality of the machined *** rotation-minimizing frame aims to reduce unnecessary frame rotation during *** concept has been adopted to develop tool orientation methods that allow variation in the inclination angle,the tilt angle,and both the inclination and tilt *** intention is to reduce unnecessary rotation of the tool frame as the tool follows a specified *** was conducted in the context of five-axis flat-end tool *** on these methods,tool orientation was planned along surface paths of a torus,sphere,and *** in tool orientation were always *** the perspective of reducing tool orientation changes and axial acceleration,it was demonstrated that simultaneous variation of the inclination and tilt angles based on rotation minimization provided the best results.

关键词： Five-axis machining Tool orientation Rotation-minimizing frame Numerical control