Top-level modeling theory of multi-discipline virtual prototype

Multi-disciplinary virtual prototypes of complex products are increasingly and widely used in modern advanced manufactur- ing. How to effectively address the problems of unified modeling, composition and reuse based on the multi-disciplinary heteroge- neous models has brought great challenges to the modeling and simulation （M＆S） science and technology. This paper presents a top-level modeling theory based on the meta modeling framework （M2F） of the COllaborative SIMulation （COSlM） theory of virtual prototyping to solve the problems. Firstly the fundamental prin- ciples of the top-level modeling theory are decribed to expound the premise, assumptions, basic conventions and special require- ments in the description of complex heterogeneous systems. Next the formalized definitions for each factor in top level modeling are proposed and the hierarchical nature of them is illustrated. After demonstrating that they are self-closing, this paper divides the top- level modeling into two views, static structural graph and dynamic behavioral graph. Finally, a case study is discussed to demon- strate the feasibility of the theory.

多学科协作的I-PDCA模式在结直肠癌学科建设中的实践与思考

目的 探讨北京大学肿瘤医院结直肠癌学科建设中多学科协作模式及实施情况,为医院学科建设和创新管理提供借鉴。方法 本中心7年来将创新设计与传统PDCA管理方法相融合,针对医疗、科研、人才培养开展了五阶段I-PDCA新模式的多学科协作。结果 该模式弥补了传统PDCA四阶段模式缺乏创造力的弊端,促进了本院结直肠癌学科相关资源在多个维度的高效配置,在结直肠癌学科建设中发挥了重要作用。结论 结直肠癌多学科协作的I-PDCA模式有利于提升医疗服务、科研成果产出和人才培养水平,为学科未来发展提供助力。

Multi-features Based Approach for Moving Shadow Detection

In the video-based surveillance application, moving shadows can affect the correct localization and detection of moving objects. This paper aims to present a method for shadow detection and suppression used for moving visual object detection. The major novelty of the shadow suppression is the integration of several features including photometric invariant color feature, motion edge feature, and spatial feature etc. By modifying process for false shadow detected, the averaging detection rate of moving object reaches above 90% in the test of Hall-Monitor sequence.

The Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST)

The Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST, also called the Guo Shou Jing Telescope) is a special reflecting Schmidt telescope. LAMOST’s special design allows both a large aperture (effective aperture of 3.6 m–4.9 m) and a wide field of view (FOV) (5°). It has an innovative active reflecting Schmidt configuration which continuously changes the mirror’s surface that adjusts during the observation process and combines thin deformable mirror active optics with segmented active optics. Its primary mirror (6.67m×6.05 m) and active Schmidt mirror (5.74m×4.40 m) are both segmented, and composed of 37 and 24 hexagonal sub-mirrors respectively. By using a parallel controllable fiber positioning technique, the focal surface of 1.75 m in diameter can accommodate 4000 optical fibers. Also, LAMOST has 16 spectrographs with 32 CCD cameras. LAMOST will be the telescope with the highest rate of spectral acquisition. As a national large scientific project, the LAMOST project was formally proposed in 1996, and approved by the Chinese government in 1997. The construction started in 2001, was completed in 2008 and passed the official acceptance in June 2009. The LAMOST pilot survey was started in October 2011 and the spectroscopic survey will launch in September 2012. Up to now, LAMOST has released more than 480 000 spectra of objects. LAMOST will make an important contribution to the study of the large-scale structure of the Universe, structure and evolution of the Galaxy, and cross-identification of multiwaveband properties in celestial objects.

Characteristics of lateral vehicular interactions in heterogeneous traffic with weak lane discipline

Heterogeneous traffic conditions prevail in developing countries. Vehicles maintain weak lane discipline which increases lateral interactions of vehicles significantly. It is necessary to study these interactions in the form of maintained lateral gaps for modeling this traffic scenario. This paper aims at determining lateral clearances maintained by different vehicle types while moving in a heterogeneous traffic stream during overtaking. These data were collected using an instrumented vehicle which runs as a part of the stream. Variation of obtained clearance with average speed of interacting vehicles is studied and modeled. Different instrumented vehicles of various types are developed using （1） ultrasonic sensors fixed on both sides of vehicle, which provide inter-vehicular lateral distance and relative speed; and （2） GPS device with cameras, which provides vehicle type and speed of interacting vehicles. They are driven on different roads in six cities of India, to measure lateral gaps maintained with different interacting vehicles at different speeds. Relationships between lateral gaps and speed are modeled as regression lines with positive slopes and beta-distributed residuals. Nature of these graphs （i.e., slopes, intercepts, residuals） are also evaluated and compared for different interacting vehicle-type pairs. It is observed that similar vehicle pairs maintain less lateral clearance than dissimilar vehicle pairs. If a vehicle interacts with two vehicles （one on each side） simultaneously, lateral clearance is reduced and safety of the vehicles is compromised. The obtained relationships can be used for simulating lateral clearance maintaining behavior of vehicles in heterogeneous traffic.

A Comparative Study of Acute Hemodynamic Effects of Multi -site Cardiac Pacing in patients with cardiac function NYHA class ⅠtoⅡ without bundle branch block

Objective To compare the acute hemodynamic effects of five different pacing modes in patients with cardiac function NYHA class Ⅰ to Ⅱ without bundle branch block (BBB). Methods This study included 12 patients (SSS 7, Ⅲ°AVB 5) undergoing pacemaker implantation. Right ventricular apex (RVA), right ventricular outflow tract (RVOT), right ventricular bifocal (RV-Bi), left ventricular base (LVB) and bi -ventricular (Bi-Ⅴ) pacing at 60 -80 ppm were done in VVI mode prior to implantation of DDD pacemaker. The cardiac index (CI), mean pulmonary artery pressure (mPAP) and pulmonary capillary wedge pressure (PCWP) were measured with Swan - Ganz thermodilution catheter after 5 minutes of each pacing mode. Results (1) Comparing to pacing at RVA (CI: 2. 41± 0. 38 L/min per m2, PCWP: 16. 7 ±3.3 mmHg), the CI increased and the PCWP decreased significantly in pacing at RVOT(CI: 2. 63 ± 0.46, PCWP: 13. 8±2. 3), LVB(CI: 2. 78±0.52, PCWP: 14. 4±3.1), RV-Bi(CI: 2. 83±0.57, PCWP: 12. 8± 2. 5) and Bi -Ⅴ pacing (CI: 2. 94± 0.60, PCWP: 12. 7±2. 5), P < 0. 01, respectively. (2) The CI of RV-Bi and Bi-Ⅴ pacing was higher than that of RVOT and LVB pacing, the PCWP was lower, P < 0. 05, respectively. (3) There was no significant difference between RV - Bi pacing and Bi-Ⅴ pacing in CI and PCWP. Conclusion There is no significant difference between RV - Bi pacing and Bi -V pacing in the acute hemodynamic effects; however,dual - site pacing is much better than single site pacing in that aspect for patients with cardiac function NYHA class Ⅰ to Ⅱ without BBB. Among single site pacing, the RVOT and LVB pacing is better than RVA pacing in cardiac function.

Research on A Master - slave Multi - microcomputers Control System for Hollow Spindle Fancy Yarn Spinning Machine

In this paper, a successfully studied and developed master - slave muld - microcomputers control system based on PC - BUS for hollow spindle fancy yarn spinning machine, mainly Its overall scheme, software and hardware construction, is introduced. Spinning experiments show that the system achieves satisfactory result. This system can solve the diftkultles of mechatronical fusion between domestic hollow splndk fancy yarn spuming muchine and its microcomputer control technology.

On the Representation of Multi-layer Woven Structure

A quantitative method is developed to identify the structures of multi-layer woven fabric in this study. Six structural parameters are selected to represent the fabric structure. With some design criteria for the reinforcement of textile composites, the relationships among the structural parameters are derived for different binding patterns of the fabric structure. The conditions, which meet the requirements of structural cell stability,are also discussed.

Computer-aided Pattern Design of Multi-bar Warp Knitted Fabrics

To meet the development trend of multi-bar warp knit-ting machine towards high-speed,advanced technologyand computer control and the requirements of variousproducts with small quantity,there are many researcheson the computer-aided pattern design of multi-barwarp knitted fabrics.In terms of the special propertiesof the computer-aided pattern design of multi-barwarp knitted fabrics,the Object Oriented Program(OOP)programming-Object Windows class Library(OWL)programming is selected.According to thecharacters of the OWL programming,various functionsare defined.Pattern design and technical parameters canbe output,which offers a great convenience for the fac-tory.

MODS： A Novel Metaheuristic of Deterministic Swapping for the Multi-Objective Optimization of Combinatorials Problems

This paper states a new metaheuristic based on Deterministic Finite Automata （DFA） for the multi - objective optimization of combinatorial problems. First, a new DFA named Multi - Objective Deterministic Finite Automata （MDFA） is defined. MDFA allows the representation of the feasible solutions space of combinatorial problems. Second, it is defined and implemented a metaheuritic based on MDFA theory. It is named Metaheuristic of Deterministic Swapping （MODS）. MODS is a local search strategy that works using a MDFA. Due to this, MODS never take into account unfeasible solutions. Hence, it is not necessary to verify the problem constraints for a new solution found. Lastly, MODS is tested using well know instances of the Bi-Objective Traveling Salesman Problem （TSP） from TSPLIB. Its results were compared with eight Ant Colony inspired algorithms and two Genetic algorithms taken from the specialized literature. The comparison was made using metrics such as Spacing, Generational Distance, Inverse Generational Distance and No-Dominated Generation Vectors. In every case, the MODS results on the metrics were always better and in some of those cases, the superiority was 100%.

2000-2004年中国知识产权研究的文献计量分析

本文以2000至2004年间在我国内地发表的4612篇中文期刊论文为样本,分析了近年来国内知识产权研究的主要趋势。研究发现,知识产权研究无论是在产出方式、研究机构、空间分布、研究主题、学科偏向、还是研究方法的使用上,都表现出较强的非均衡性。分析表明,知识产权研究在国内已经受到了广泛的关注,但与国际知识产权研究的趋势还有一定的差异。文章认为,国内知识产权研究应该更多地以合作的方式,从多学科的角度进行定量的实证研究,尝试更多的研究方法,同时注意研究的深度与研究规范的提升。

基于DLNS-DSVDD的故障检测方法

为了解决支持向量数据描述方法对多模态动态过程故障检测率低的问题,提出了基于双局部近邻标准化的动态支持向量数据描述的故障检测方法。首先,应用DLNS方法标准化样本生成标准数据集;其次,利用动态方法将标准数据集构造成动态矩阵;最后,使用SVDD方法建立基于空间距离的统计量进行故障检测,应用DLNS-DSVDD方法对一个数值例子和田纳西-伊斯曼过程(TE过程)进行仿真测试,并与传统方法对比分析。结果表明,DLNS-DSVDD方法在具有更低的误报率的前提下拥有更高的故障检测率,平均误报率为2.2%,相比于SVDD方法降低了2.1%,平均故障检测率为88.2%,相比于SVDD方法提高了38.5%,证明了所提出的方法可以有效地监控具有多模态动态特征的化工生产过程。DLNS-DSVDD方法可以有效地剔除数据的多模态结构并且准确地捕获样本中的动态信息,为提高SVDD方法在多模态动态过程中的故障检测性能提供了参考。

跨多机构多医院的生物医学影像研究平台(e-Science)的设计

目的近来,愈来愈多的影像信息研究人员和工程师渴望构建影像信息的基础设施或新的框架以利于医学研究人员、临床医生、生物医学工程师在一个安全有效透明的环境中进行多学科合作研究。该文介绍了在上海建立的用于生物医学影像信息研究与应用的e-Science平台的梗概与初步设计,平台的设计理念、设计策略及初步结果,并讨论在建立该平台过程中遇到的若干挑战性问题和解决的对策。

基于IMDS-DLNS方法的工业过程故障检测

针对多维尺度变换(multidimensional scaling,MDS)方法对高维数据进行维数约简时,新样本缺少映射矩阵无法进行低维嵌入的问题,提出了增量式多维尺度变换(incremental multidimensional scaling,IMDS)方法。首先,引入双重局部近邻标准化(dual local nearest neighbor standardization,DLNS)技术以解决IMDS方法降维后数据仍然具有多中心、方差差异明显等问题;其次,采用Hotelling T^(2)统计量对过程进行监控,组成增量式多维尺度变换和双重局部近邻标准化的故障检测方法(IMDS-DLNS);最后,通过数值模拟过程和青霉素发酵过程,将IMDS-DLNS方法分别与PCA,KPCA和FD-KNN等方法作对比分析。结果表明,IMDS-DLNS对比其他方法有更高的故障检测率。IMDS-DLNS方法对多变量、多模态过程具有良好的故障检测能力,能够保障产品质量和生产的安全性,可为工业过程故障检测研究提供参考。

MDT联合LBL-PBL-CBL教学法在神经内科住院医师规范化培训中的应用

目的 探讨多学科综合治疗模式(multi-disciplinary treatment,MDT)结合传统授课为基础的教学法(lecture-based learning,LBL)-以问题为中心的教学法(problem-based learning,PBL)-基于案例的教学法(case-based learning,CBL)在神经内科住院医师规范化培训中的应用效果。方法 选取2021年2月—2022年1月在苏州大学附属第一医院神经内科轮转的60名住院医师为研究对象,随机分为试验组和对照组,每组30名。试验组住院医师规范化培训采用在脑卒中MDT病例中运用LBL-PBL-CBL结合的教学法,对照组采用传统LBL教学法进行脑卒中病例的学习。通过出科考试成绩和满意度问卷调查对两组的教学效果进行检验。结果 试验组住院医师的理论成绩、病案分析成绩和考试总分均高于对照组,差异有统计学意义(P <0.05);试验组住院医师的满意度(学习主动能力、临床思维能力、团队协作能力、医患沟通能力)高于对照组,差异有统计学意义(P <0.05),试验组带教老师的满意度(提高学生临床综合分析能力、激发学生学习主观能动性、提高学生医患沟通交流能力)高于对照组,差异有统计学意义(P<0.05)。结论 在进行神经内科的教学过程中采用MDT和LBL-PBL-CBL相结合的教学法能有效提高教学效果。

新工科背景下地方本科高校产业学院建设路径探索--以ZUA为例

在国家新工科战略背景下,以地方本科高校为例,从产业学院内涵、特色产业学院的建设要素、航空特色专业群、产学研平台、科研服务模式以及人才评价机制等方面探索了航空产业学院的建设路径,为地方本科高校建设具有新工科特征的特色产业学院提供路径参考。

Pressure Gradient Force,Saffman Lift,and Magnus Lift on the Fiber-like Particle in Fluid

Flher-like particle suspensions are common in both na-ture and industry, but there is little work reported on it.The forces acting on the fiber - like particle in fluid arestudied in this paper, and the Magnus lift, Saffman lift,pressure gradient force, and then the dynamics modelhave been received. The numerical study of the simpleshear flow past the cylinders shows that the particles ’motion is controlled by the vortex.

On the Fluid Approximation for a Multiclass Queue under Non-Preemptive SBP Service Discipline

A multi-class single server queue under non-preemptive static buffer priority （SBP） service discipline is considered in this paper. Using a bounding technique, we obtain the fluid approximation for the queue length and busy time processes. Furthermore, we prove that the convergence rate of the fluid approximation for the queue length and busy time processes is exponential for large N. Additionally, a sufficient condition for stability is obtained.

工程训练课程多学科交叉项目式教学改革实践

为培养适应社会需求、具有解决复杂工程问题能力的高水平工程创新人才,针对目前我国大学生特点和大多数高校人才培养现状,充分发挥高校工程训练中心优势,以能力达成为导向,采用多学科交叉项目式教学课程,对新工科人才培养方式进行改革,并给出实施建议,对于推动工程素质教育和创新教育改革、全面提高人才培养质量具有参考价值。

产教融合视阈下高素质复合型金融人才的培养

新时代金融业急需一批金融理论基础知识扎实、实践创新能力突出的金融专业硕士人才,而当前高校金融专业硕士人才培养仍存在若干不足,如合作机制不健全、产业师资资源匮乏、教学内容传统、教学方式落后、评价体系不完善等问题。这些问题影响了高校金融专业硕士人才的培养质量,也制约产教融合的深入推进。应该有针对性地调整人才培养策略:一是建设产教融合培养实践基地;二是完善双导师协同教学体系;三是教学内容融入行业前沿动态;四是多种方式加强实践教学;五是建立健全教学评价体系。以推动产教融合向纵深发展,提高高校金融专业硕士人才培养质量,为金融行业输送更多高素质复合型金融专业人才。