技工工艺对义齿基托适合性的影响

目的 :研究技工操作因素对义齿基托适合性的影响。方法 :将不同粉液比、充填时期、聚合温度、混合方式以及出盒温度成型的上颌半口义齿基托就位于标准模型上 ,用实体显微镜 (精度 0 .0 1mm )测量其与标准模型间的间隙 ,数据经t检验统计处理。结果 :在不同粉液比组、不同充填时期组、不同聚合温度组和不同出盒温度组均存在显著差异 (P <0 .0 5)。结论 :义齿基托适合性受到单体含量、充填时期。

电机机座工艺与机械加工分析

电机机座存在的根本目的是为了保证电机的安全稳定运行。从电机机座工艺与机械加工方面入手展开剖析,探讨电机机座结构与结构变形误差原因,从电机机座加工注意事项、机座车削加工、加工顺序三个方面对电机机座工艺加工进行分析,比照电机机座新旧加工工艺,提出了全新的改进方案。

机械加工工艺对零件加工精度的影响

机械加工工艺不但影响零件的加工精度,而且影响着产品的质量。故在一定条件下,可以说机械加工工艺的层次高低是由零件的加工精度决定的。机械加工工艺与零件加工精度之间关系密切,对其影响主要从内外两个方面进行分析考虑。首先通过零件的外在因素进行分析机械加工工艺对零件精度的影响,主要考虑不同性质的零件体加工后对其整体的影响,其次机械加工工艺对零件加工精度的影响通过其理化性质展现,主要包括热变形和受力的影响。通过分析机械加工工艺对零件加工的影响因素,可以保证在一定的技术经济条件下,有效利用各种零件体,减少损失,促进机械加工工艺的发展,增加经济技术效益。

浅析自动化控制技术在机械加工工艺中的应用

随着机械制造业的快速发展,机械加工工艺技术水平处于不断提升的趋势之中。而自动化控制技术在机械加工工艺中的应用,为其机械制造业发展提供了一个有效的支持,一方面提升了机械加工工艺水平,另外一方面则促使机械制造业朝着更为成熟的自动化、智能化方面不断发展。机械制造的集成化应用、柔性化应用以及智能化应用是机械加工工艺自动化的集中体现,本文自动化控制技术的组成部分以及在机械加工工艺中的应用进行了分析,并深入探讨了自动化控制技术在机械加工工艺中的具体应用。

机械加工工艺中的自动化控制技术

在中国经济和社会飞速进步的背景下,国民生活水平和生活质量也随之大幅提升。目前,我国机械加工工艺行业正处于重要的发展时期。在我国社会经济发展中,重要的基础性产业之一就是机械加工行业。所以,在这里要对机械加工工艺中如何有效使用自动化控制技术做一些分析和探讨,包括装配自动化技术、物资运输与调配自动化技术、生产自动化技术等,然后阐述了自动化技术在机械加工工艺中的相关技术诸如智能化技术、柔性化技术、虚拟化技术等在今后有着怎样的发展方向。机械加工行业在我国经济蓬勃发展的过程中占据着非常重要的位置,并且给经济的发展提供了很大的帮助。机械加工业是我国的支柱产业,为我国人民的生产、生活提供了物质保证和技术支持。

High-Voltage MOSFETs in a 0.5μm CMOS Process

There is growing interest in developing high-voltage MOSFET devices that can be integrated with low-voltage CMOS digital and analog circuits. In this paper,high-voltage nand p-type MOSFETs are fabricated in a commercial 3.3/ 5V 0.5μm n-well CMOS process without adding any process steps using n-well and p-channel stops. High current and highvoltage transistors with breakdown voltages between 23 and 35V for the nMOS transistors with different laydut parameters and 19V for the pMOS transistors are achieved. This paper also presents the insulation technology and characterization results for these high-voltage devices.

Research on Optimized Utilization of Naphtha Resources Based on Adsorptive Separation with Zeolite

By means of molecular scale management, the technology of separating normal paraffins from naphtha through adsorption using 5A molecular sieves was studied with the purpose of optimizing the utilization of naphtha. The raw materials used in steam cracking and catalytic reforming processes could be allocated properly. During the adsorption process, the separation efficiency of the normal paraffins was above 99.9% with the purity of normal paraffins in the desorption oil exceeding 98.2%. With the use of the desorption oil as the feedstock of steam cracking, the ethylene yield increased from 29.7%-35.0% to 41.4%- 49.2% compared to that of the naphtha in the existing plant under similar operation conditions. The potential aromatic content of the raffinate oil rose from 30.6% to 43.5% compared to that in naphtha. The research octane number of the raffinate oil reached more than 85 with an increase of 20 units compared to that of naphtha, so the raffinate oil is more suitable for use as a blending component for high-octane clean gasoline.

Study and Commercial Test on Technology for Deacidification of Distillate Oils

A new kind of solvent for deacidification of distillate oils was introduced in this paper. After successful laboratory study this technology had been applied in commercial scale successfully. Compared to traditional caustic wash of distillate oils, this technology has a lot of merits, such as the broad range of distillates to be processed, low caustic consumption, recycle of deacidifying agent, absence of waste caustic discharge, and low equipment revamp expenses, which can have promising perspectives for exploitation and application of this technology.

Potential Hazards in Smoke-Flavored Fish

Smoking is widely used in fish processing for the color and flavor. Smoke flavorings have evolved as a successful alternative to traditional smoking. The hazards of the fish products treated by liquid-smoking process are discussed in this review. The smoke flavoring is one important ingredient in the smoke-flavored fish. This paper gives the definition of smoke flavorings and the hazard of polycyclic aromatic hydrocarbons （PAHs） residue in the smoke flavorings on the market. It gives also an assessment of chemical hazards such as carcinogenic PAHs, especially Benzo-[α]pyrene, as well as biological hazards such as Listeria monocytogenes, Clostridium botulinum, histamine and parasites in smoke-flavored fish. The limitations in regulations or standards are discussed. Smoke flavored fish have lower content of PAHs as compared with the traditional smoking techniques if the PAHs residue in smoke flavorings is controlled by regulations or standards.

Combating climate change calls for a global technological cooperation system built on the concept of ecological civilization

Climate change has been considered as the most paramount global environmental problem and the biggest externality throughout the history of human development. Accordingly, the world is facing unprecedented technological innovation and collaborative demands to deal with climate change. In the 2015 Paris Agreement, a long-term vision of technology development and transfer implementation was proposed, and policy and financial support for technological innovation in the area of climate change was advocated. These terms aim to enable developing countries to acquire the necessary technology in the early stage of the technology cycle to address climate change challenge. However, the traditional technological innovation and cooperation mode based on industrial civilization can hardly meet the technical demands of global climate protection. To ensure the continuous development and deployment of technology in a required scale and pace, a new global technical cooperation system is proposed to develop based on the philosophy of ecological civilization. The core contents of this system are supposed be as follows:to implement all-win cooperation targets, adhering to cooperation principles of Eco-man, adopt cooperation content that reflects synergy, pursue cooperation based on mutual trust, encourage participation of multiple actors, and promote sharing of cooperative outputs.

STRESS ANALYSIS OF FREEZING PIPES BY MODELLING

Using the simulation test facility designed on the basis of similitude principle, the authors of the paper carry out a series of simulation tests and study the influence of effective factors on the stress in the freezing pipes during hoth periods of active freezing and excavating-lining. They obtain preliminarily the regularity of stress variation and discuss the causes of freezing pipe fracture.

The Application of 3D Visualization Technology in the Construction of Water Conservancy and Hydropower

This paper put forward the structure and construction process of three-dimensional visualization of hydroelectric construction system model based on GIS and 3D visualization platform. The paper first describes the 3D visualization based on GIS, then discusses the method of constructing 3D visual digital model, and then introduces the terrain digital technology, feature modeling technology. Finally, the technical route shows that this method has good practicability.

The Coevolutionary Relationship of Technology, Market and Government Regulation in Telecommunications

The telecommunications industry has been undergoing tremendous technological changes, and owning to continuous technological advancement, it has maintained sustained prosperity and development. In this paper, the interplay between technology, market and government in telecommunications is discussed briefly, and then we introduce technology and government into the traditional SCP(Structure – Conduct – Performance) paradigm to develop an industry analysis framework called TGM(SCP)(Technology – Government – Market(Structure – Conduct – Performance)). Based on this framework, we present the spiral coevolution model which elaborates on the interaction mechanism of technological innovation with government regulation and market dynamics from the perspective of industry evolution. Our study indicates that the development of the telecommunications industry is the result of the coevolution of technology, government regulation and market forces, and among the three actors, technology is the fundamental driving force. Relative to the "invisible hand"(market) and "visible hand"(government), we conceptualize technology as the "third hand", which fundamentally drives the development of telecommunications industry in coordination with the other two hands. We also provide several policy implications regarding these findings.

Development of RSDS-III Technology for Ultra-Low-Sulfur Gasoline Production

The 3rd generation catalytic cracking naphtha selective hydrodesulfurization(RSDS-III) technology developed by RIPP included the catalysts selective adjusting(RSAT) technology, the development of new catalysts and optimized process conditions. The pilot plant test results showed that the RSDS-III technology could be adapted to different feedstocks. The sulfur content dropped from 600 μg/g and 631 μg/g to 7 μg/g and 9 μg/g, respectively, by RSDS-III technology when feed A and feed B were processed to meet China national V gasoline standard, with the RON loss of products equating to 0.9 units and 1.0 unit, respectively. While the feed C with a medium sulfur content was processed according to the full-range naphtha hydrotreating technology, the sulfur content dropped from 357 μg/g in the feed to 10 μg/g in gasoline, with the RON loss of product decreased by only 0.6 units. Thanks to the high HDS activity and good selectivity of RSDS-III technology, the ultra-low-sulfur gasoline meeting China V standard could be produced by the RSDS-III technology with little RON loss.

Commercial Application of the RAR Sulfur Recovery and Tail Gas Treating Process

The 40kt/a sulfur recovery unit for tail gas treating applying the reduction-absorption-recycling (RAR) technology is aimed at regeneration of the rich amine solution and recovery of sulfur to operate in tandem with the 1.2Mt/a diesel hydrofining unit. The process unit calibration data have revealed that the recovery of total sulfur reaches 99.86%, which is 6.65 percentage points higher than that before application of the RAR technology. The SO2 content in vented tail gas is 0.27 t/d, which is much less than the latest emission standard prescribed by the State. The factors that can affect the unit operation have been analyzed and corresponding measures have been suggested including the necessity to improve the control over the reaction temperature in the tail gas hydrogenation unit.

Innovative Techniques and Technologies in Conservation Projects

The present paper analyses the possibilities of using modern technology and technical engineering in conservation practices. Some examples of heritage abuse are given alongside some innovative ways of presenting relics of the past to society. Methodology consists in the scrutinizing of chosen examples, selecting conclusions and a synthetic presentation of research results. The aim is proper protection of historic architectural resources through documentation and dissemination of knowledge. First part is concerned to rejection of old aesthetics values and implementing a new one on example of Brussels＇ House of the People （the largest work by Victor Horta that opened on 1899 and demolished in 1965 despite a protest of architects） and ridiculous renovation in Krynica, Poland. In second part, it presents tree examples of successful implementation of innovative techniques and technologies as the Pauline fathers realizations of renovation sacred architecture （churches, cloisters）, also valuable digital projects of the reconstruction of the vaults and realization of underground Museum in Krakow, Poland （the outstanding creation of the atmosphere of virtual historic reality by the latest audio-visual techniques）.

重度酸蚀牙列的全口粘结咬合重建三步法技术

重度酸蚀牙列通常使用全冠进行全口咬合重建。近来．随着粘结技术的不断推进．全冠的使用逐渐减少．能够更好保存牙体组织的粘结修复方法开始受到关注。尽管粘结修复简化了临床治疗和技工工艺程序，但对于大面积严重缺损的病例．采用这种治疗方法仍有很大挑战性。三步法技术是在简化设计和治疗理念的基础上提出的全新概念。它通过三次临床操作和三步技工操作的相互交叉．使临床医师和技师进行充分交流．从而达到最理想的美观和功能效果。该技术的第一步为美观评估，主要是建立正确的咬合平面。第二步是在抬高的垂直距离上建立后牙的咬合关系。第三步是重新建立前牙切导。这样的三步法技术将全口咬合重建变化成部分区域分别咬合重建。该文除了简单介绍第一步外．主要介绍第二步．即抬高垂直距离后利用咬合的生理原则进行技工和临床修复的步骤。

第八次全国口腔种植学大会

由中华口腔医学会口腔种植专业委员会主办，吉林大学口腔医学院承办的第8次全国口腔种植学大会将于2013年7月11—13日在吉林省长春市召开。大会将以”我国口腔种植30年：成就与展望”为主题，就口腔种植相关的基础研究、种植外科、种植修复、技工工艺以及相关研究等各个方面进行交流。大会举行的同时还将举办相关口腔种植器械展。投稿可为论著、临床经验总结、病例报告或系统评价等，求为未正式发表的原始论文，具有较高的科学性、先进性。

第9次全国口腔种植学术会议第1轮会议将召开

费用：非专科会员1500形人；中华口腔医学会种植专科会员1300形人；学生（含本科、硕士、博士生凭证）750元／人会议介绍：会议将以“口腔种植技术现实与挑战”为主题，具体分为3项主要内容：大会专题报告、自由投稿（口头发言、壁报交流）和病例交流等。本次大会期间将就口腔种植相关的基础研究、种植外科、种植修复、技工工艺和种植护理等方面进行交流。