组合机床总图参数化图形信息管理系统

机床总图参数化图形信息管理系统是在Ｗｉｎｄｏｗｓ环境下开发的，面向组合机床设计的计算机辅助设计系统。本系统能够高效率、高质量地完成机床总图的设计与绘制。其主要特点是具有交互性及通用部件专用化。

组合机床加工示意图参数化图形信息管理系统

本文介绍用Ｃ＋＋语言在Ｗｉｎｄｏｗｓ环境下开发的面向组合机床设计人员的参数化图形信息管理系统。数据库系统用Ｃ＋＋语言独立编写，图形系统在ＡｕｔｏＣＡＤＲ１２ｆｏｒＷｉｎｄｏｗｓ环境下用Ｃ＋＋语言利用ＡＤＳ图形开发技术编写。本软件融数据库操作系统和参数化图形系统于一体，形成功能强大的参数化图形信息管理系统、该系统建立了主轴、接杆、导向套、刀具等结构性能数据库和对应的参数化图形数据库。设计人员通过修改标准件或通用件的参数，可生成专用的主轴、接杆、导向套、刀具。本软件能完成钻孔、扩孔、镗孔、铰孔、铣削和攻丝等工艺的加工示意图。

多学科设计优化在建筑工程设计中的应用

针对传统建筑设计阶段重信息执行、轻信息评价的现象,采用多学科设计优化技术,通过分析建筑设计阶段涉及的各学科特性及学科间的耦合关系,建立参数化建筑信息模型,在各局部最优解空间中快速搜索整体优化解.以简单长方形教室为算例,将系统划分为几何、结构、能源和经济4个子模块,给出设计参数与约束条件,并对结构和能源模型的优化做了分析,采用遗传算法加快优化方案的搜寻速度,表明多学科设计优化能有效地促进建筑设计整体的综合性能达到最优.

旋翼翼型高速风洞试验壁压法修正研究

基于已有的单参数线化壁压信息法,在做相应简化改动后应用于旋翼翼型高速试验数据修正,着力解决工程上遇到的旋翼翼型高速风洞试验结果不理想的问题。文中采用该方法对FL-21风洞得到的OA309旋翼翼型试验数据进行了修正。结果表明,修正后的旋翼翼型气动特性曲线与国外已有结果吻合较好。该方法能有效满足旋翼翼型高速风洞试验修正的需要。

并行设计环境下蜗杆蜗轮CAPP的研究

提出并行设计环境下蜗杆传动零件的CAPP系统的技术原理与实现方法 ,建立参数化特征信息模型 ,提出关联特征约束推理和特征分组的方法。采用基于特征模型的工艺设计方法 ,使特征模型能较好地应用于蜗杆传动的CAD/CAPP。

智慧渔业中的机器视觉技术应用研究现状

通过整理分析国内外相关文献资料,从鱼类摄食行为识别与精准饲喂、鱼体参数识别与测量、鱼群病害诊断与防治3个应用角度,对机器视觉技术在智慧渔业领域的研究现状进行详细阐述,并对基于机器视觉技术的智慧渔业系统的优缺点和适用场景进行了总结,最后提出了复杂水体环境下的鱼体分割和鱼体交叠等方面的研究趋势和发展方向。

BIM-based construction technologies for precast foamed lightweight concrete wallboards

To promote the visualisation and informatisation of the construction process of precast foamed lightweight concrete wallboards(PFLCWs),from the analysis of the construction requirements of PFLCWs,three key construction technologies based on building information modelling(BIM),namely,parameterised modelling for the PFLCW layout design,drawing generation to draw the PFLCW layout and quantity statistics for extracting PFLCW quantities,are proposed.Then,a reinforced concrete(RC)frame infilled with PFLCW is considered the test model to verify the feasibility of the aforementioned technologies.The results show that PFLCW layout design can be accomplished rapidly and visually using parameterised modelling technology.The PFLCW layout diagram can be generated directly using drawing generation technology.The proposed quantity statistics technology enables the automatic export of PFLCW bills of quantities.The built parameterised model helps construction workers rapidly and intuitively understand the specific layout details of PFLCWs.Moreover,the generated layout drawing and the bills of quantities based on the parameterised model can guide the production and on-site installation of PFLCWs.The research conclusions can serve as a practical guide and technical support for PFLCW engineering applications.

In Vitro Study of Photodynamic Therapy for Treatment of Bacteremia in Whole Blood

Antibiotic resistance has been compromised hospitalized patients with serious infections. The main cases of bacteremia can be caused by antibiotic resistant pathogens. Photodynamic therapy （PDT） has been shown as an alternative for inactivation of microorganisms in blood. In this therapy photochemical mechanisms occur that may prevent the development of bacteria. This study aims optimization of PDT parameters for blood decontamination. Concentration ofphotosensitizer （PS）, light dose （LD） and incubation time （IT） were studied for hemolysis and cell toxic effects. It was observed that PDT can be used for microbial inactivation in total blood reducing 0.85 log10 CFU/mL ofS. aureus at 15 J/cm^2 and 50μg/mL of Photogem .

Macedonia Demographic Aging

In this paper, it explained the process of demographic aging in Republic of Macedonia. There is relevant information for the gradually process of aging. At the end of the text, there are few charts. Macedonia gained independence in 1991, in the course of transition from planned to market economy, many socio-economic parameters changed： Demography become evident that fertility rate dropped significantly. In the previous 20 years, number of infants born decreased somewhat 5-6 times compared to 1980. Number of divorce grew rapidly. Also, in the Republic of Macedonia, there followed a parallel process of immigration to western countries, especially western Europe, USA and Australia as well as other countries from the developed world. This migration happened as a result of mainly economic reasons, i.e., countries in which Macedonians migrate have much higher real incomes when compared with Macedonia, and comparatively much higher living standard. One also can find reason for migration in political reasons also, and family reunification. Low fertility is associated with low income and unemployment. People in Macedonia had suffered greatly in transition times with high unemployment, low wages, and corruption, which largely derogated their chances of better future and career and contributed to the demographic aging and low fertility rates.

BIM技术在港珠澳大桥澳门口岸旅检大楼钢结构、屋面、幕墙一体化施工中的应用

港珠澳大桥主体全长29.6 km,其连接了香港口岸、珠海口岸及澳门口岸,密切了港澳与内地城市的关系,为珠三角地区带来新的发展机遇.港珠澳大桥澳门口岸旅检大楼(简称旅检大楼)位于珠海人工岛澳门口岸,由旅检大楼、通道楼两部分组成.项目体量大、工期紧、施工精度要求较高,同时旅检大楼部分主体结构为全钢结构,并采用曲线“飘带”屋面及双层铝板幕墙,施工难度较大.通过运用BIM技术,对主体钢结构、屋面、幕墙进行了一体化施工管理,使工程管理效率提高、返工量减少、施工进度加快,确保了施工顺利进行.

Investigating the possibility of a turning point in the dark energy equation of state

We investigate a second order parabolic parametrization, w（a） = wt ＋ wa（at - a）2, which is a direct characterization of a possible turning in w. The cosmological consequence of this parametrization is explored by using the observational data of the SNLS3 type Ia supernovae sample, the CMB measurements from WMAP9 and Planck, the Hubble parameter measurement from HST, and the baryon acoustic oscillation （BAO） measurements from 6dFGS, BOSS DRI 1 and improved WiggleZ. We found the existence of a turning point in w at a - 0.7 is favored at 10- CL. In the epoch 0.55 〈 a 〈 0.9, w 〈 -1 is favored at 10- CL, and this significance increases near a - 0.8, reaching a 20- CL. The parabolic parametrization achieve equivalent performance to the ACDM and Chevallier-Polarski-Linder （CPL） models when the Akaike information criterion was used to assess them. Our analysis shows the value of considering high order parametrizations when studying the cosmological constraints on w.

Non-coding regions of the Ebola virus genome contain indispensable phylogenetic and evolutionary information

We compared the numbers of nucleotide substitutions occurring in the non-coding regions and coding regions of Ebola virus genomes and found that non-coding regions contain indispensable phylogenetic and evolutionary information. The omission of genetic data from non-coding regions can lead to unreliable phylogenies and inaccurate estimates of evolutionary parameters.

Spatial-temporal characteristics of epidemic spread in-out flow——Using SARS epidemic in Beijing as a case study

For better detecting the spatial-temporal change mode of individual susceptible-infected-symptomatic-treated-recovered epidemic progress and the characteristics of information/material flow in the epidemic spread network between regions,the epidemic spread mechanism of virus input and output was explored based on individuals and spatial regions.Three typical spatial information parameters including working unit/address,onset location and reporting unit were selected and SARS epidemic spread in-out flow in Beijing was defined based on the SARS epidemiological investigation data in China from 2002 to 2003 while its epidemiological characteristics were discussed.Furthermore,by the methods of spatial-temporal statistical analysis and network characteristic analysis,spatial-temporal high-risk hotspots and network structure characteristics of Beijing outer in-out flow were explored,and spatial autocorrelation/heterogeneity,spatial-temporal evolutive rules and structure characteristics of the spread network of Beijing inner in-out flow were comprehensively analyzed.The results show that(1)The outer input flow of SARS epidemic in Beijing concentrated on Shanxi and Guangdong provinces,but the outer output flow was disperse and mainly includes several north provinces such as Guangdong and Shandong.And the control measurement should focus on the early and interim progress of SARS breakout.(2)The inner output cases had significant positive autocorrelative characteristics in the whole studied region,and the high-risk population was young and middle-aged people with ages from 20 to 60 and occupations of medicine and civilian labourer.(3)The downtown districts were main high-risk hotspots of SARS epidemic in Beijing,the northwest suburban districts/counties were secondary high-risk hotspots,and northeast suburban areas were relatively safe.(4)The district/county nodes in inner spread network showed small-world characteristics and information/material flow had notable heterogeneity.The suburban Tongzhou and Changping districts were the underlying high-risk regions,and several suburban districts such as Shunyi and Huairou were the relatively low-risk safe regions as they carried out minority information/material flow.The exploration and analysis based on epidemic spread in-out flow help better detect and discover the potential spatial-temporal evolutive rules and characteristics of SARS epidemic,and provide a more effective theoretical basis for emergency/control measurements and decision-making.