Multi-Agent模式下的城市暴雨内涝应急决策方法研究

为厘清应对暴雨内涝灾害动态决策过程中决策主体、决策、决策方案等决策要素间的不确定关系,提出1种多主体(Multi-Agent)和贝叶斯决策网络(BDN)相结合的应急决策方法。首先分阶段构建“主体-任务”可视化网络,分析暴雨内涝灾害各应急阶段的主要任务和参与的决策主体;在考虑到决策要素间的动态不确定性可能造成决策风险的前提下,运用Multi-Agent和BDN方法探究各决策要素间的影响关系,以便进行方案集优选。研究结果表明:该方法具有实用性和现实意义,研究结果可为城市暴雨内涝灾害的应急决策提供理论参考。

基于Multi-Agent的分布式主题信息采集结构模式研究

网络信息资源数量众多、结构各异,分布于世界各地的资源节点上,如何以某一特定知识主题在这些信息资源中采集信息、发现知识是当前信息科学研究面临的一个重要问题。围绕这一问题,本文介绍了一个基于Multi-Agent的面向特定主题领域的网络信息采集系统结构模型。

基于Multi-Agent的网络谣言传播事件中信息主体信任识别研究

[目的/意义]全媒体背景下,网络舆情的爆发使谣言借助通信渠道快速扩散,群体辟谣效果下产生各种质量层次不齐的信息。为了对信息主体进行信任识别,构建信任识别模型。[方法/过程]运用Agent关系网络,结合Agent间的历史交互信息,提出基于Multi-Agent的信任识别模型,考虑到个体异质性,引入动态权重因子,将直接信任和间接信任进行组合,计算出目标主体的综合信任值,从中寻找出最为可靠的信息主体。[结果/结论]网络谣言事件下构建的信任识别模型对恶意信息主体能够有效识别;使用动态权重因子计算的综合信任值敏感性增强;信任判别网络中Agent的数量并不影响信任模型的有效性。

基于随机演化动力学的多微网-配电网自组织协同调节策略

新型电力系统背景下,必然会出现大量小规模微网多点并入配电网,配电网与多微网协同优化运行面临决策变量维数高、多主体优化目标复杂、单小主体入网互动随机性强等难点。文中提出基于随机演化动力学的多微网-配电网自组织协同调节策略,旨在提高系统多利益主体的自发演化优化能力以及单小主体随机入网互动的抗干扰能力。首先,建立了基于公共品价格响应的多微网-配电网多维资源调节模型,降低了多主体优化的变量维数。然后,提出了基于随机演化稳定判据的自组织演化策略,通过多利益主体二项分布下的演化效用函数将多优化目标转为“合作-非合作”二维目标,并通过计及随机涨落力的演化动力过程获得自发协调运行能力,以有效应对单小微网随机特性影响。最后,对改进IEEE 37节点系统进行了仿真,通过多典型场景下多算法对比实验,验证了所提策略的有效性。

Selection Method of Multi-Objective Problems Using Genetic Algorithm in Motion Plan of AUV

To research the effect of the selection method of multi-objects genetic algorithm problem on optimizing result, thismethod is analyzed theoretically and discussed by using an autonomous underwater vehicle(AUV) as an object. A changingweight vtlue method is put forward and a selection formula is modified. Some experiments were implemented on an AUV.TwinBurger. The results shows that this method is effective and feasible.

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.

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。

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.

Epidemio-Clinical, Therapeutic and Evolutive Aspects of Pulmonary Embolism in Young Subject in the Cardiology Department in Point “G” Hospital University Center Bamako

Objective: The purpose of this work was to determine the epidemiological, clinical and evolutionary aspects of the pulmonary embolism of the young person in the cardiology department of the University Hospital Center (CHU) Point G in Bamako-Mali. Methodology: This was an analytical study from January 01, 2018 to December 31, 2018 in the CHU Point G cardiology department, including all patients hospitalized during this period. Results: Of 1379 hospitalized patients, 19 patients were concerned by pulmonary embolism of the young person. The prevalence of pulmonary embolism of the young person was 1.37%. The most affected age group was 21 - 30 (47.4%) of patients. The predominance was female (89.47%) with a gender ratio of 0.11 in favour of women. The average age in the series was 29.79 years with extremes of 16 years and 40 years. Factors predisposing to pulmonary embolism were dominated by peri partum, cardiomyopathy and obesity with 47.3%, 31.57% and 21.1%, respectively. The dominant signs were chest pain and dyspnea in 94.7% and 89.5% of cases respectively. Pulmonary embolism was unlikely in 60.52% according to the Geneva and Wells score simplified. At the thoracic angioscanner, the embolism was bilateral in 52.6% of cases and distal in 36.8% of patients;in 10 patients who performed cardiac ultrasound, pulmonary arterial hypertension (70%), dilation of the right ventricle (20%) and left ventricular dilation (40%). Hyper leucocytosis (47.4%), anemia and low prothrombin rate (TP) (22.2%) were the most found biological abnormalities. More than 2/3 (68.5%) our patients had an intermediate mortality risk according to the PESI (Pulmonary Embolism Severity Index) score. The average hospital stay was 10 days. Hospital mortality was 10.5%. Conclusion: The pulmonary embolism of the young person is a frequent, serious and multifactorial pathology and the female sex is most affected especially during peri partum periods, hence the need for preventive measures. Clinical signs are not specific and based on the assessment of clinical probability. Pulmonary angioscanner remains the confirmation review in our context.

协同治理视角下城市社区多元主体参与垃圾分类研究--以南京市Y社区为例

随着环保事业的不断发展,垃圾分类成为环境保护的重要内容,积极推动垃圾分类对改善环境具有极大的促进作用。以南京市Y社区垃圾分类为例,发现居民分类意识弱、政府服务不充分、自治组织缺位、物业公司推脱义务等主体原因造成社区垃圾分类效果差。提出在协同共治视角下通过主体定位协同、意愿协同、机制协同、工具协同来促进社区多元主体进行垃圾分类协同共治,提高社区垃圾分类效果。

Multi-Level Halftoning by IGS Quantization

Improved gray-scale (IGS) quantization is a known method for re-quantizing digital gray-scale images for data compression while producing halftones by adding a level of randomness to improve visual quality of the resultant images. In this paper, first, analyzing the IGS quantizing operations reveals the capability of conserving a DC signal level of a source image through the quantization. Then, a complete procedure for producing a multi-level halftone image by IGS quantization that can achieve the DC conservation is presented. Also, the procedure uses the scanning of source pixels in an order such that geometric patterns can be prevented from occurring in the resulting halftone image. Next, the performance of the multi-level IGS halftoning is evaluated by experiments conducted on 8-bit gray-scale test images in comparison with the halftoning by error diffusion. The experimental result demonstrates that a signal level to be quantized in the IGS halftoning varies more randomly than that in the error diffusion halftoning, but not entirely randomly. Also, visual quality of the resulting halftone images was measured by subjective evaluations of viewers. The result indicates that for 3 or more-bit, in other words, 8 or more-level halftones, the IGS halftoning achieves image quality comparable to that by the error diffusion.

以产业需求为导向的产教融合研究生培养模式探索与实践

为顺应社会经济高速发展对人才的迫切需求,促进人才培养供给侧和产业需求侧结构要素全方位融合,进一步优化产教融合人才培养模式,解决现阶段存在的校企合作不稳定、产学相对脱节、多主体协同机制不完善的问题,湖南大学控制科学与工程学科提出以产业需求为导向的“两翼支撑-三维协同-四链贯通”深度产教融合人才培养模式,以构建校内校外双实践平台为两翼支撑,完善学校、企业、政府三维协同机制,贯通产业链、教育链、实践链及人才链,将产教融合贯通产学研全过程,全面提升研究生的专业实践能力,在新时代高层次应用型工科人才的培养上取得显著的成效,实现研究生培养模式改革和产业迭代双统筹发展,可供国内外高校借鉴。

Study of A Multi-criteria Evaluation Methodology for Nuclear Fuel Cycle System Based on Sustainability

This paper presents a multi-criteria evaluation methodology for nuclear fuel cycle options in terms of energy sustainability. Starting from the general sustainability concept and the public acceptance questionnaire, a set of indicators reflecting specific criteria for the evaluation of nuclear fuel cycle options are defined. Particular attention is devoted to the resource utility efficiency, environmental effect, human health hazard and economic effect, which represent the different concerns of different stakeholders. This methodology also integrated a special mathematic processing approach, namely the Extentics Evaluation Method, which quantifies the human being subjective perception to provide the intuitionistic judgement and comparison for different options. The once-through option and reprocessing option of nuclear fuel cycle are examined by using the proposed methodology. The assessment process and result can give us some guidance in nuclear fuel cycle evaluation under the constraint of limited data.

基于SD演化博弈的建筑工程质量潜在缺陷保险履约研究

当前,我国大力推行的住宅质量潜在缺陷保险(Inherent Defects Insurance,IDI)实施效果亟需改善。针对寻租行为导致的工程质量问题,基于保险公司视角构建履约阶段保险公司、承包商、风险管理机构的三方博弈模型,运用系统动力学进行仿真,改变合作损失、名誉损失、监督成本等数值,探究各主体行为演化过程及各因素对主体策略变化的影响。结果表明,保险公司积极监督受到承包商寻租和风险管理机构意向寻租策略的正向影响,出于长久合作考虑,不会出现寻租行为,监督成本是影响保险公司策略的主要因素。验证结果具有科学性,为IDI在市场中的顺利推行和应用提供了理论依据。

基于学科融合体的警察培训模式研究

中华民族伟大复兴时代科技的飞速发展使公安实战业务涉及到多种学科的综合化,如何在有限时间内最大程度提高民警多学科的专业运用能力和综合素质,是当前警察教育培训面临的难题。针对这一难题,基于学科融合体的警察培训模式是一条行之有效的路径。这一模式主张深入分析警察培训课程特色及教学模式的特点,针对公安工作跨学科的基本特性,突出培训过程中科学、技术与实战应用的结合。建议公安院校要创新教学训练的思路和理念,进一步合理配置警察教育培训教学内容,更深层地体现出新时期警察教育培训的绩效性、科学性和实战性,同时基于公安院校自身的学科优势及科研成果的累积,架构“大教育、大培训”的公安教学训练新模式。

盐碱地水肥耦合对基质栽培番茄生长与产量品质的影响

为探究盐碱地水肥耦合对基质栽培番茄生长的影响,设置3组灌溉水平W1(268 mm),W2(201 mm),W3(161 mm)和3组施肥水平(N-P_(2)O_(2)-K_(2)O,kg/hm^(2))F1(260-200-220 kg/hm^(2)),F2(208-160-176 kg/hm^(2)),F3(156-120-132 kg/hm^(2)),共9组耦合处理,以无基质水肥组合作为对照组CK,基于温室大棚试验研究水肥耦合对盐碱地土壤盐分、基质栽培番茄株高茎粗、根系特征、产量与品质的影响,并构建遗传算法多目标优化模型确定盐碱地基质栽培番茄的最优水肥调控策略.结果表明:与CK相比,基质处理株高、茎粗、根系特征、水肥利用效率、产量与品质具有显著优势;基质处理土壤表层盐分含量较低,土壤剖面0~30 cm表现为积盐过程,30~60 cm表现为脱盐过程;通过AHP-CRITIC主客观组合赋权的VIKOR法对番茄产量、风味品质进行评价,处理W3F1的利益比率最小,产量与品质最佳;基于遗传算法多目标优化模型求解Pareto最优解,确定盐碱地基质栽培番茄的最佳水肥耦合策略为W3F2,研究可为盐碱地高品质果蔬的水肥科学管理提供理论依据.