介孔Ti_3C₂负载酞菁铁电催化剂设计及其碱性条件下氧还原性能研究(英文)

Mesoporous Ti_3C_2-Loaded Iron Phthalocyanine (FePc) Electrocatalyst for Efficient Oxygen Reduction Reaction under Alkaline Conditions

基于构筑块导向组装策略设计合成钼红簇合物{Mo₄₉}及其质子传导性能研究(英文)

Design and Synthesis of Molybdenum Red Cluster {Mo₄₉} by Building Block-Directed Assembly for Proton Conduction

构建VO_x/TiO₂/n⁺⁺ Si的p-i-n结构提高钒氧化物基阻变存储器的可靠性和稳定性(英文)

Enhanced Reliability and Stability of Vanadium Oxide-Based RRAM by Constructing VO_x/TiO₂/n⁺⁺ Si p-i-n Structure

聚苯乙烯-丁二烯-苯乙烯掺杂苝二酰亚胺衍生物力致变色（英文）

Mechanochromism of a Perylene Diimide Derivative-Doped Styrene-Butadiene-Styrene Block Copolymer

准各向同性碳纤维层合板弯曲性的热氧化效应（英文）

Effect of Thermo-Oxidative Aging on Flexural Behavior of Quasi-Isotropic Carbon Fiber Reinforced Composite Laminates

生态资源利用:基于薇甘菊与废纸制备复合纸及其应用（英文）

Utilization of Ecological Resources:Preparation and Application of Composite Paper Made from Mikania Micrantha and Waste Paper

关系模式的主属性特征研究(英文)

Features of Prime Attributes in a Relation Scheme

范式在关系数据库规范化理论中具有重要作用，其定义通过主属性或非主属性与键之间的函数依赖(functional dependency， FD)关系来确立。然而，判定属性是否为主属性是一个非确定性多项式时间完全问题(nondeterministic polynomial-time complete， NP-complete)，这使得确定关系模式所属范式的复杂度较高。尽管如此，在特定情况下，识别主属性并非复杂任务。为此，该文将关系模式R(U，F)中的属性集U根据其在函数依赖集F中的出现情况，划分为四个子集：U₁(仅出现在FDs左部的属性)、U₂(仅出现在FDs右部的属性)、U₃(同时出现在FDs左右部的属性)和U₄(未出现在F中的属性)。通过深入分析，阐明了候选键作为关系模式唯一键的充要条件，探讨了U₃中主属性的特征，并归纳了一般主属性的特征。该研究有助于有效区分主属性识别中的复杂与简单情形，进一步加深对这一问题的理解。

Normal forms have a significant role in the theory of relational database normalization. The definitions of normal forms are established through the functional dependency (FD) relationship between a prime or nonprime attribute and a key. However， determining whether an attribute is a prime attribute is a nondeterministic polynomial-time complete (NP-complete) problem， making it intractable to determine if a relation scheme is in a specific normal form. While the prime attribute problem is generally NP-complete， there are cases where identifying prime attributes is not challenging. In a relation scheme R(U，F)， we partition U into four distinct subsets based on where attributes in U appear in F: U₁ (attributes only appearing on the left-hand side of FDs)， U₂ (attributes only appearing on the right-hand side of FDs)， U₃ (attributes appearing on both sides of FDs)， and U₄ (attributes not present in F). Next， we demonstrate the necessary and sufficient conditions for a key to be the unique key of a relation scheme. Subsequently， we illustrate the features of prime attributes in U₃ and generalize the features of common prime attributes. The findings lay the groundwork for distinguishing between complex and simple cases in prime attribute identification， thereby deepening the understanding of this problem.

生态资源利用:基于薇甘菊纤维素与废纸制备复合纸及其应用(英文)

Utilization of Ecological Resources: Preparation and Application of Composite Paper Made from Mikania Micrantha Cellulose and Waste Paper

该研究旨在探索薇甘菊（M. micrantha）纤维素和废纸复合纸浆在手工造纸中的潜力。研究了薇甘菊杆与废纸质量比（MRMW）、打浆时间、水与浆的质量比（WPMR）及浆液筛选次数（TPSS）对纸张基本结构、光学和机械性能的影响。结果表明，MRMW对复合纸的各项性能影响最大。当MRMW为3︰7时，纸张厚度、定量（单位面积质量）和密度达到最大值，而MRMW为7︰3时，这些性能显著降低。此外，MRMW对复合纸的白度有显著影响，当MRMW为3︰7时，纸张白度达到最高。WPMR和TPSS主要影响复合纸的厚度、定量和密度，但影响程度小于MRMW。延长打击时间可提高纸张密度。所制备样品的抗张强度为1.5～4.1 kN/m，表明其具有满足多种纸张应用需求的优良强度性能。相比传统包装纸，用这种复合纸制作的艺术包和灯罩具有更自然的质感。研究证实了利用薇甘菊纤维素造纸是可行的；探讨了废物资源与传统手工造纸技术的整合与协同发展。

This study explores the potential of using a blended pulp from Mikania micrantha (M. micrantha) cellulose and waste paper for producing handmade composite paper. The effects of the mass ratio of M. micrantha stem to waste paper (MRMW)， the beating time (BT)， the water-to-pulp mass ratio (WPMR) and the times of pulp solution screening (TPSS) on the paper’s basic structural， optical and mechanical properties are investigated. It is found that the MRMW has the greatest influence on the properties of the composite paper. An MRMW of 3︰7 maximizes thickness， grammage (mass per unit area) and density， whereas an MRMW of 7︰3 significantly reduces these properties. In addition， the MRMW significantly affects the whiteness of the paper， with the highest level of whiteness achieved at an MRMW of 3︰7. The WPMR and TPSS primarily influence thickness， grammage and density but to a lesser extent compared to MRMW. Extending BT can increase paper density. Besides， the tensile strength of all prepared samples falls in the range of 1.5 to 4.1 kN/m， indicating their excellent strength properties that meet the demands of many paper applications. The artistic bags and lampshades crafted from this composite paper exhibit a more natural texture compared to conventional packaging paper. This research demonstrates that papermaking using M. micrantha cellulose is feasible and explores the integration and co-development of waste resources with traditional hand papermaking techniques.

DCA-YOLO：一种基于注意力机制优化的YOLOv8肺结节检测方法(英文)

DCA-YOLO: Detection Algorithm for YOLOv8 Pulmonary Nodules Based on Attention Mechanism Optimization

肺结节是肺癌的早期表现，然而肺结节在图像中占比较小，不仅导致医生阅片难度大，还可能会出现误检和漏检的情况。针对这些问题，该文提出在YOLOv8网络的基础上加入可形变卷积和空洞空间金字塔池化（atrous spatial pyramid pooling， ASPP）并融合坐标注意力（coordinate attention， CA）机制，使得网络能够聚焦小目标的同时又扩大感受野而不丢失分辨率，同时利用不同方向的注意力模块来聚集目标上的上下文信息，增强特征表达，有效提高定位精确度。所得算法在LUNA16的数据集上取得了良好的效果，相比与其他检测算法，该算法对肺结节检测的精度有一定改善。

Pulmonary nodules represent an early manifestation of lung cancer. However， pulmonary nodules only constitute a small portion of the overall image， posing challenges for physicians in image interpretation， thus potentially leading to false positives or missed detections. To solve these problems， YOLOv8 network is enhanced by adding deformable convolution and atrous spatial pyramid pooling (ASPP)， and the coordinate attention (CA) mechanism is fused into it， so that the network can focus on small targets while expanding the receptive field without losing resolution. At the same time， context information on the target is gathered and feature expression is enhanced by attention modules in different directions. It effectively improves the positioning accuracy and achieves good results on the LUNA16 dataset， and compared with other detection algorithms， the accuracy of pulmonary nodule detection is improved to a certain extent.

多孔Ti₃C₂T_x用于高效电催化析氢反应(英文)

Porous Ti₃C₂T_x for Efficient Electrocatalytic Hydrogen Evolution Reaction

MXene是一种新兴的二维过渡金属碳化物或氮化物，具有高度可调控的组分和表面官能团，在电催化析氢反应中表现出巨大的应用前景，但是MXene纳米片极易堆叠且缺乏活性的边缘位点，会降低活性位点的可及性。此工作开发了氧化刻蚀的方法，合成了多孔Ti₃C₂T_x，并通过一系列光谱学表征，解析了Ti₃C₂T_x和多孔Ti₃C₂T_x的结构特征。发现多孔Ti₃C₂T_x表面存在大量面内孔，具有很高的比表面积(111.4 m²/g)，这不仅增加了大量边缘活性位点，而且提高了活性位点的可及性。电化学测试结果表明，相比于Ti₃C₂T_x，多孔Ti₃C₂T_x在0.5 mol/L H₂SO₄电解质中的电化学活性比表面积是Ti₃C₂T_x的1.7倍(440 mF/cm²)，电荷转移电阻降低了95.1%(12.8 Ω)，塔菲尔斜率降低了69.8%(144 mV/dec)，因此在电流密度为10 mA/cm²时表现出了更低的过电位(535.5 mV)，且具有很好的稳定性。同时，利用Ti₃C₂T_x的局域表面等离子体共振效应，可在近红外激光辐照下进一步提升多孔Ti₃C₂T_x电催化析氢反应性能。

MXene is an emerging class of two-dimensional (2D) layered transition metal carbides or nitrides. Due to the highly tunable components and surface functional groups， they hold great potential in electrocatalytic hydrogen evolution reaction (HER). However， MXene nanosheets suffer from the strong tendency to restack and the lack of active edge sites. In this work， the porous Ti₃C₂T_x was synthesized by an oxidation and etching two-step strategy， and then characterized by a series of spectroscopic techniques. The obtained porous Ti₃C₂T_x possesses a large number of in-plane pores and shows a high specific surface area (111.4 m²/g). This not only creates abundant active edge sites， but also enhances the mass transfer and increases the accessibility of the active sites. Compared with Ti₃C₂T_x， the porous Ti₃C₂T_x shows a 1.7 times higher electrochemical surface area (440 mF/cm²)， 95.2% lower of charge transfer resistance (12.8 Ω)， and 69.8% lower of Tafel slope (144 mV/dec)， and thus exhibits a lower overpotential (535.5 mV) with good stability at a current density of 10 mA/cm². At the same time， the HER performance of porous Ti₃C₂T_x can be further enhanced by near-infrared laser irradiation based on the localized surface plasmon resonance effect.

Quality Control Study on High Pressure Casting Based on Magma and Ultra-red Simulation

The temperature control of high-pressure die casting mold is one difficult problem in die industry. The inner quality of product is greatly affected by mold temperature. Taking the automobile gearbox parts as an example, by the combination of waterproof thermocouple and TP700-16/TP700-40 multi-channel temperature tester, one set of device for monitoring mold real-time temperature is developed. The high pressure die casting die and mold temperature field simulation are carried out by using Magma software. By simulating analysis and reducing process parameter interval of Magma, the ideal mold temperature is obtained and the quality problem of die casting is solved after the simulation parameters are copied to the die casting machine. The practical results show that the instability of die casting is decreased. the time cost of die casting is decreased by increasing die casting overall equipment effectiveness(OEE),the risk of personal accident is reduced and the product scrap rate can be effectively reduced. Finally, the future research directions are pointed out.

Parametric Design of Modular Fixture Structure

Parametric Design of Modular Fixture Structure

<正> Based on an example of its typical structure, the concept of modular fixture structure module is presented, and the structure module system of modular fixture is summarized. Then the parametric design of structure is discussed, and its advantages are also emphasized. Furthermore, some specific methods are provided, such as the selection of fixture components, the determination and input of parameters, drawing representative model, and the creation of drawing. Finally an applied example of structure parametric design is presented.

Based on an example of its typical structure, the concept of modular fixture structure module is presented, and the structure module system of modular fixture is summarized. Then the parametric design of structure is discussed, and its advantages are also emphasized. Furthermore, some specific methods are provided, such as the selection of fixture components, the determination and input of parameters, drawing representative model, and the creation of drawing. Finally an applied example of structure parametric design is presented.

Development of Standard Examination System of Special Course for Remote Education

Development of Standard Examination System of Special Course for Remote Education

<正>Standard examination is an effective approach to promote the teaching quality of modern education. On terms of the analysis of main target, function and constitution of special course examination system for remote education, the internet scheme of the examination system is given according to the students and teachers' requirements. The implementation method for the communication and dynamic production of tests on home page of the exam system are elaborated by using programming technology of Active Server Pages (ASP) 3.0. The query of exam information and automatic marking of test questions can be easily realized by the developed exam system under World Wide Web environment according to users' requirements.

Standard examination is an effective approach to promote the teaching quality of modern education. On terms of the analysis of main target, function and constitution of special course examination system for remote education, the internet scheme of the examination system is given according to the students and teachers' requirements. The implementation method for the communication and dynamic production of tests on home page of the exam system are elaborated by using programming technology of Active Server Pages (ASP) 3.0. The query of exam information and automatic marking of test questions can be easily realized by the developed exam system under World Wide Web environment according to users' requirements.

Study on the Relation between Garment Style and Ease Distribution

Study on the Relation between Garment Style and Ease Distribution

The shape of body and the ease of garment are the important elements in constructing garment style. However, the distribution of ease in garment is uneven and the curves showing different cross-sections of garment style with ease are unavailable in the literature. This information is crucial when the three-dimensional garment style is transformed into two-dimensional garment patterns. Thus, several different X-line style garments are produced by 3D draping technology, and the cubic spline is used to fit the cross sectional curves of BL, WL of body and garment. By comparing cross sections of body and garment, the ease at different location can be derived. Besides, garments in 10 different dimensions and quantities of style ease are included in the current study. By numerical operation on discrete ease data at different location, the fitted functions of ease distribution are obtained.

Software Test Case Generation with Adequacy Analysis on Scenario-Based Testing

Software Test Case Generation with Adequacy Analysis on Scenario-Based Testing

This paper studies the software scenario testing, which is commonly used in black-box testing at present. In the paper, the workflow model based on task-driven, which is very common in scenario testing, is analyzed. According to test adequacy criteria in scenario testing, the model is designed to correspond test cases in the light of logic block(LB). The final test cases that conform to the test adequacy criteria can be obtained through test case combination and test case reduction. In the last part of the paper, example of actual workflow is to design the efficient test case. Therefore the method is proved to be effective.

This paper studies the software scenario testing, which is commonly used in black-box testing at present. In the paper, the workflow model based on task-driven, which is very common in scenario testing, is analyzed. According to test adequacy criteria in scenario testing, the model is designed to correspond test cases in the light of logic block(LB). The final test cases that conform to the test adequacy criteria can be obtained through test case combination and test case reduction. In the last part of the paper, example of actual workflow is to design the efficient test case. Therefore the method is proved to be effective.

Accuracy Analysis of Assembly Success Rate with Monte Carlo Simulations

Accuracy Analysis of Assembly Success Rate with Monte Carlo Simulations

<正> Monte Carlo simulation was applied to Assembly Success Bate (ASK) analyses. ASR of two peg-in-hole robot assemblies was used as an example by taking component parts' sizes, manufacturing tolerances and robot repeatability into account. A statistic arithmetic expression was proposed and deduced in this paper, which offers an alternative method of estimating the accuracy of ASR, without having to repeat the simulations. This statistic method also helps to choose a suitable sample size, if error reduction is desired. Monte Carlo simulation results demonstrated the feasibility of the method.

Monte Carlo simulation was applied to Assembly Success Bate (ASK) analyses. ASR of two peg-in-hole robot assemblies was used as an example by taking component parts' sizes, manufacturing tolerances and robot repeatability into account. A statistic arithmetic expression was proposed and deduced in this paper, which offers an alternative method of estimating the accuracy of ASR, without having to repeat the simulations. This statistic method also helps to choose a suitable sample size, if error reduction is desired. Monte Carlo simulation results demonstrated the feasibility of the method.

Tess - A Pure but Tragic Woman

Tess - A Pure but Tragic Woman

<正> Thomas Hardy had a developing conception of tragedy in the process of his novel creation. When he wrote Tess of D'Urbervilles, he became fully aware that the human tragedy resulted far more from society than characters themselves. The article is to elaborate how society imposes on Tess the tragedy in a planned way.

Thomas Hardy had a developing conception of tragedy in the process of his novel creation. When he wrote Tess of D'Urbervilles, he became fully aware that the human tragedy resulted far more from society than characters themselves. The article is to elaborate how society imposes on Tess the tragedy in a planned way.

Thomas Hardy's Understanding of Tragedy and His Creation of Characters

Thomas Hardy's Understanding of Tragedy and His Creation of Characters

<正>Thomas Hardy' s understanding of tragedy was in devel-opment owing to the influence of various factors. The de-velopment illustrated itself clearly in his four representa-tive tragic novels The Return of the Native, The Mayor ofCasterbridge, Tess of the D' Urbervilles and Jude theObscure, especially in the four principal characters Eusta-cia, Henchard, Tess and Jude of the novels. The paperattempts to elucidate that Thomas Hardy managed, un-der the influence of his developing understanding of trag-edy, to describe Eustacia as a "tragedy of fate", Hen-chard as a "tragedy of character", Tess and Jude as"tragedies of society". The paper is composed of four

Thomas Hardy's understanding of tragedy was in development owing to the influence of various factors. The development illustrated itself clearly in his four representative tragic novels The Return of the Native, The Mayor of Casterbridge, Tess of the D'Urbervilles and Jude the Obscure, especially in the four principal characters Eusta-cia, Henchard, Tess and Jude of the novels. The paper attempts to elucidate that Thomas Hardy managed, under the influence of his developing understanding of tragedy, to describe Eustacia as a "tragedy of fate", Hen-chard as a " tragedy of character", Tess and Jude as "tragedies of society". The paper is composed of four sections. The first one is about Hardy as a novelist of tragedy, the second about his understanding of tragedy, the third about his understanding of Immanent Will and the fourth about whether he is a pure pessimist or not. Although Hardy wrote so many tragedies, it is appropriate for us to regard him as a writer who made a gloomy description of the gloomy social reality. As a realist writer, his writing was uniform with the gloomy background that the Victorian Dynasty was falling apart.

Evaluation of the Strategic Tolerance Human Resource Management Based on Matter-Element Analysis Method

Evaluation of the Strategic Tolerance Human Resource Management Based on Matter-Element Analysis Method

The main features and connotation of the tolerance human resource management based on strategy are analyzed and summarized.The theory and method of systematic engineering is used to build the evaluation index systems for the tolerance human resource management.On the basis of it,by using the theory of matter-element analysis,the matter-element models are formulated for the evaluation of the tolerance human resource management.Regarding annual tolerance human resource management as the object of matter-element,the tolerance human resource management for two years are analyzed and evaluated through using the matter-element models proposed.A case study is carried out and the satisfactory results are obtained.A new scientific method is provided for the evaluation of human resource management based on strategy.

The main features and connotation of the tolerance human resource management based on strategy are analyzed and summarized.The theory and method of systematic engineering is used to build the evaluation index systems for the tolerance human resource management.On the basis of it,by using the theory of matter-element analysis,the matter-element models are formulated for the evaluation of the tolerance human resource management.Regarding annual tolerance human resource management as the object of matter-element,the tolerance human resource management for two years are analyzed and evaluated through using the matter-element models proposed.A case study is carried out and the satisfactory results are obtained.A new scientific method is provided for the evaluation of human resource management based on strategy.

Research on the Mechanism of Retail Strategy Influencing Consumer Behavior Intention——Based on Empirical Analysis of Domestic Luxury Cosmetics Brands

Research on the Mechanism of Retail Strategy Influencing Consumer Behavior Intention——Based on Empirical Analysis of Domestic Luxury Cosmetics Brands

This is a research on the mechanism of retail strategy mix and consumer behavior intention,and psychological impact on consumer attitude, consumer purchase decision-making model and its components are conducted firstly. Next, retail strategy, merchandise strategy, and store strategy, contained in the retail management theory, are adopted as other important variables to measure the impact on consumer attitudes. And then, the key factors of retail strategy mix are identified by means of Focus Group (FG). In addition, the hypothetical model of retail strategy mix and consumer behavior intention for domestic luxury cosmetic brands is established to understand the relationship between the two factors. Finally, empirical researches are conducted on consumers and retailers of luxury cosmetics brands. And some advice are given on retail strategy mix's influence on the consumer behavior intentions, aiming to enlighten domestic luxury cosmetic enterprises to improve performance by the integrated use of retail strategy mix.

This is a research on the mechanism of retail strategy mix and consumer behavior intention, and psychological impact on consumer attitude, consumer purchase decision-making model and its components are conducted firstly. Next, retail strategy, merchandise strategy, and store strategy, contained in the retail management theory, are adopted as other important variables to measure the impact on consumer attitudes. And then, the key factors of retail strategy mix are identified by means of Focus Group (FG). In addition, the hypothetical model of retail strategy mix and consumer behavior intention for domestic luxury cosmetic brands is established to understand the relationship between the two factors. Finally, empirical researches are conducted on consumers and retailers of luxury cosmetics brands. And some advice are given on retail strategy mix's influence on the consumer behavior intentions, aiming to enlighten domestic luxury cosmetic enterprises to improve performance by the integrated use of retail strategy mix.

DCA-YOLO:一种基于注意力机制优化的YOLOv8肺结节检测算法（英文）

DCA-YOLO: Detection Algorithm for YOLOv8 Pulmonary Nodules Based on Attention Mechanism Optimization

肺结节是肺癌的早期表现,然而肺结节在图像中占比较小,不仅导致医生阅片难度大,而且还可能出现误检和漏检的情况。针对这些问题,该文提出在YOLOv8网络的基础上加入可变形卷积和空洞空间金字塔池化(atrous spatial pyramid pooling,ASPP)并融合坐标注意力(coordinate attention,CA)机制,使得网络在聚焦小目标的同时又扩大感受野而不丢失分辨率。同时利用不同方向的注意力模块来聚集目标上的上下文信息,增强特征表达,有效提高定位精确度。所得算法在LUNA16的数据集上取得了良好的效果,相比于其他检测算法,该算法对肺结节检测的精度有一定改善。

Pulmonary nodules represent an early manifestation of lung cancer. However, pulmonary nodules only constitute a small portion of the overall image, posing challenges for physicians in image interpretation and potentially leading to false positives or missed detections. To solve these problems, the YOLOv8 network is enhanced by adding deformable convolution and atrous spatial pyramid pooling(ASPP), along with the integration of a coordinate attention(CA) mechanism. This allows the network to focus on small targets while expanding the receptive field without losing resolution. At the same time, context information on the target is gathered and feature expression is enhanced by attention modules in different directions. It effectively improves the positioning accuracy and achieves good results on the LUNA16 dataset. Compared with other detection algorithms, it improves the accuracy of pulmonary nodule detection to a certain extent.