现代信息技术在技工学校《信息技术》课程教学中的应用

文章旨在探讨现代信息技术在技工学校《信息技术》课程教学中的应用。通过多媒体教学平台、虚拟实验室、在线协作学习环境和数据分析工具等应用,学生可更深入地理解和应用信息技术知识,提升他们的学习兴趣和能力。然而,这些应用也带来一些挑战,通过合理的解决方案,可克服这些挑战并进一步优化教学效果。因此,现代信息技术在技工学校《信息技术》课程教学中具有广阔的前景与展望。

近代早期湖南刻工与技工研究——兼论近代湖南印刷技术的改革

近代早期(1840-1919),对湖南出版事业来说,是一个快速发展和转折的时期。先是湖南书局的创办,接着思贤书局一跃而起成为清末我国著名的雕版印刷书局;无论是官办的书局、民办官助的绅办书局,还是坊刻,私刻,都出版了大量书籍,而且刻书质量精致。毫无疑问,刻工是其最主要的原因之一,本文试着通过对近代早期湖南刻工与技工考查,探讨近代湖南印刷技术的改革。

江西省红茶产业现状与加工技术研究进展

为提高江西省红茶加工科技水平,促进江西省红茶产业的高质量发展,梳理了近十年来江西省红茶的生产现状和加工技术进展,分析了江西省红茶产业现阶段存在的问题,最后从深化加工理论研究、加速新技术创新、加快新产品开发等方面对江西省红茶产业的发展前景进行了展望。

刍议电力企业高级技工技师培训现状及对策

随着电力行业的快速发展,电力企业人力资源的需求量不断增加,尤其是对于高级技工的需求显得更加迫切。因为电气企业高级技工技术懂得电力运行专业原理,具备电力运行管理的经验和技能,是当前电力企业的关键性人才。但是当前电力企业高级技工技师培训工作现状不是很理想,急需要采取对应的措施进行改善和调整。文章从这个角度出发,对于当前电力企业高级技工技师培训现状进行探究,希望找到解决培训机制失效的对策,以改善电力企业用人之困。

高职“特种加工技术”应用课程项目化教学研究

文章首先就"特种加工技术"课程在当前我国高中院校当中的整体开展状况进行阐述,并在此基础上,建设性地提出了项目化教学模式在高职"特种加工技术"当中的运用。

新疆卡朗沟锰矿床矿石特征及加工技术性能评价

新疆卡朗沟锰矿是新疆库车县正在开采的一个小型锰矿。卡朗沟锰矿石锰矿石主要以优质富锰矿和占有一定量的贫锰矿石组成，由于矿石质量好，曾有个体及地方性企业进行小规模开采，在开采过程中有部分贫锰矿石（Mn含量在18％-23％）无法利用，为不断提高贫锰矿资源的综合利用水平，实现锰矿选矿技术向生产规模转化，对区内锰矿石做了小型选矿试验，由于区内锰矿矿石类型、品位和产出特征基本一致，因此可比性较强，并利用其试验结果，对区内锰矿石加工技术性能进行对比研究，供以后更深入的地质工作参考。

探究现代数控加工技术对模具制造的促进作用

模具的加工与制造是制造业的基础行业,是我国国民经济发展的重要基础。近年来,数控加工技术以其独特的优越性在模具制作中得到了广泛地应用,传统的模具制造技术具有较大的局限性,比如说周期长、工艺落后、产品的精度低等,但是现代数控加工技术的应用弥补了这些缺点,具有效率高,精度高等特点。数控加工技术在模具制作行业得到了广泛的应用。

制造业企业技工密集型技术发展与技能员工培养

本文结合我国制造业现状和国际制造业升级经验,提出了我国制造业企业技工密集型技术发展路径和意义,并探讨了如何通过完善技能型员工培养体系,促进技工密集型技术发展的政策和建议。

关于机械加工精度提升的工艺措施探讨

随着社会经济的发展以及科技的进步,我国的机械加工技术也在日益革新,工件加工的质量直接影响着工件的质量,对工件影响最大的就是加工精度。然而在机械加工的过程中,难免会出现一些问题影响到工件的精度。所以,要不断完善加工工艺,减少因为机械设备造成的误差或者人为操作的错误,提高机械加工精度。本文对影响机械加工精度的原因进行分析,并提出一些提升加工工艺的措施。

Personal Review:Progress and prospect in electro-Fenton process for wastewater treatment

As a novel advanced oxidation process (AOP), electro-Fenton process is powerful for degrading most organic compounds including toxic and non-biodegradable ones, and so has attracted great attention. This paper reviews this process in detail including the mechanism, electrolytic bath, electrode materials, aerations and operation parameters. The application of electro-Fenton method in wastewater treatment is evaluated and summarized. Future work in this field is suggested, and three main directions of new electrode exploitation, development of assisted technologies and mechanistic study should be strengthened.

An Investigation into Regenerative Braking Control Strategy for Hybrid Electric Vehicle

Energy regeneration during braking is an important technique for hybrid electric vehicle (HEV) to improve their fuel economy and extend their driving range. Due to the effect of regenerative braking torque which is added by electric motor, the braking torque distribution between front and rear axles should be changed and the control logic of anti-lock braking system (ABS) ought to be adjusted according to the regenerative braking torque. This paper put forward a braking control strategy for hybrid electric vehicle; the control strategy is implemented with eight DOFs (Degree-of-Freedom) nonlinear vehicle forward simulation model which is built under the environment of Matlab/Simulink. Based on target wheel slip ratio, a fuzzy logic approach was applied to maintain the optimal target slip ratio so that best compromise between hydraulic torque and regenerative torque can be obtained for the vehicle.

Key techniques of symmetrical machining

To improve the machining efficiency of large symmetrical freeform surface, this paper proposes a new machining method： symmetrical machining （SM）. Based on the concept of collision avoidance plane （CAP）, collisions among cutters or headstocks are avoided, and the area of machining residue is controlled effectively. Machining residue is eliminated due to proper design of symmetrical tool in mechanism and control project. Taking 5-axis symmetrical machine with columnar headstocks and flat cutters as example, this paper proposes collision avoidance algorithm. Finally, using a twin-skeg ship model surface as an example, the method is applied to avoiding collisions in original tool path. Simulation and real machining results show that the scheme is practical. Furthermore, the machining efficiency of SM is improved 85% more than that of the traditional single cutter technology.

Enabling electrically tunable radio frequency components with advanced microfabrication and thin film techniques

Multi-function,multiband,cost-effective,miniaturized reconfigurable radio frequency(RF)components are highly demanded in modern and future wireless communication systems.This paper discusses the needs and implementation of multiband reconfigurable RF components with microfabrication techniques and advanced materials.RF applications of fabrication methods such as surface and bulk micromachining techniques are reviewed,especially on the development of RF microelectromechanical systems(MEMS)and other tunable components.Works on the application of ferroelectric and ferromagnetic materials are investigated,which enables RF components with continuous tunability,reduced size,and enhanced performance.Methods and strategies with nano-patterning to improve high frequency characteristics of ferromagnetic thin film(e.g.,ferromagnetic resonance frequency and losses)and their applications on the development of fully electrically tunable RF components are fully demonstrated.

The latest progress in research of plastics processing technology

According to the great demand for the＂ green＂ plastics processing technology of the low energy consumption, high efficiency and environmental protection in plastics industry, the plastics processing method and technology based on the elongation rheology, with continuing evolution and innovation of the plastics plasticating and conveying method, are presented and researched on the basis of the plastics dynamic processing method arid equipment, and the plastics plasticating and conveying process in the vane extrusion system, the technical characteristics and the applications of vane plasticating and conveying technology are discussed. The research results show that compared with the conventional processing equipment, this new technology and equipment shows many outstanding advantages, such as shortening the thermo-meehanical history of the plastics processing by more than 50 % , reducing the energy consumption by 30 % or so, improving the mixing and blending effects, improving the quality of the products and the adaptability to materials, etc. , and it is found that the new technology and equipment has special superiority in the fields of the processing for material systems, such as the multiphase and multicomponent composite materials, the shear heat sensitive macromolecular materials, etc.

Electroless Plating of Carbon Nanotubes with Copper

A simple chemical method was employed to coat carbon nanotubes with a layer of copper. Due to the hydrophobic nature, large surface curvature, small diameter and large aspect ratio, it is difficult to gain continuous electroless plating layer on the surface of carbon nanotubes. In this paper, a series methods (oxidization, sensitization and activation) are used to add active sites before electroless plating, and the adjustment of the traditional composition of copper electroless plating bath and operating condition can decelerate electroless plating rate. The samples before and after coating were analyzed using transmission electron microscopy and energy-dispersive X-ray spectroscopy. The results showed that the surface of carbon nanotubes was successfully coated with continuous layer of copper, which lays a good foundation for applying carbon nanotubes in composites.

Fourth Industrial Revolution:Technological Drivers,Impacts and Coping Methods

The world is marching into a new development period when the digital technology,physical technology,and biological technology have achieved an unprecedented development respectively in their own fields,and at the same time their applications are converging greatly.These are the three major technological drivers for the Fourth Industrial Revolution.This paper discusses the specific technology niches of each kind technological driver behind the Fourth Industrial Revolution,and then evaluates impacts of the Fourth Industrial Revolution on global industrial,economic,and social development.At last this paper proposes possible measures and policies for both firms and governments to cope with the changes brought by the Fourth Industrial Revolution.

New developments of technology in rock engineering in China

In terms of rock engineering and technology in hydropower construction,the slope stability and monitoring techniques for high slopes of Three Gorges Project,the stability and support technology for high slopes of hydropower projects in deep river valley,the stabilization techniques for underground cavern group with large span and high side walls are introduced in this paper.As for rock engineering and technology in highway and railway construction,the Qinghai-Tibet Railway — new construction techniques in permafrost,the support techniques for large squeezing deformation in Wuqiaoling Tunnel,the construction techniques for tunnels in alpine and high-altitude region,the geological prediction techniques for tunnels in karst region,the microseismic monitoring and early warning techniques for rockbursts in deep and long tunnels are presented.For rock engineering and technology inmining engineering,the innovative techniques for roadway support inmines,the simultaneous extraction technique of pillarless coal and gas in coal seams with low permeability,the safe and efficient deep openmining technology,advances in monitoring,early warning and treatment ofmine dynamic disasters are discussed.In addition,the new anchorage techniques and precision blasting technique in rock engineering are introduced.

A multiscale spatio-temporal framework to regionalize annual precipitation using k-means and self-organizing map technique

Determination of homogenous precipitation-based regions is a very important task in effective management of water resources. The present study tried to propose an effective precipitation-based regionalization methodology by conjugating both temporal pre-processing and spatial clustering approaches in a way to take advantage of multiscale properties of precipitation time series. Annual precipitation data of 51 years(1960-2010) for 31 rain gauges(RGs) were collected and used in proposed clustering approaches. Discreet wavelet transform(DWT) was used to capture the time-frequency attributes of the time series and multiscale regionalization was performed by using k-means and Self Organizing Maps(SOM) clustering techniques. Daubechies function(db) was selected as mother wavelet to decompose the precipitation time series. Also, proper boundary extensions and decomposition level were applied. Different combinations of the approximation(A) and detail(D) coefficients were used to determine the input dataset as a basis of spatial clustering. The proposed model's efficiency in spatial clustering stage was verified using three different indexes namely, Silhouette Coefficient(SC), Dunn index and Davis Bouldin index(DB). Results approved superior performance of k-means technique in comparison to SOM. It was also deduced that DWT-based regionalization methodology showed improvements in comparison to historical-based models. Cross mutual information was used to investigate the RGs of cluster 3's homogeneousness in DWT-k-means approach. Results of non-linear correlation approach verified homogeneity of cluster 3. Verifications based on mean annual precipitation values of rain gauges in each cluster also approved the capability of multiscale approach in precipitation regionalization.

Gas-Liquid Microreaction Technology： Recent Developments and Future Challenges

Gas-liquid microreaction technology has shown great potential in a variety of industrial relevant mass transfer operations and reactions. This paper outlines the current research status of this technology with emphasis on reactor design, hydrodynamics and mass transfer phenomena as well as reaction applications. The future challenges of this important technology are also summarized.