A New Flexible Track Automatic Drilling System

2013 ◽  
Vol 433-435 ◽  
pp. 2178-2183 ◽  
Author(s):  
Yun Bo Bi ◽  
Yi Hang Jiang ◽  
Yong Chao Li ◽  
Wei Wang ◽  
Mian Gao ◽  
...  
Keyword(s):  
High Efficiency ◽  
Low Cost ◽  
System Structure ◽  
Aircraft Assembly ◽  
Large Size ◽  
Flexible Track ◽  
Transformation Algorithm ◽  
Drilling System ◽  
High Computational Efficiency

The Flexible track automatic drilling equipment is widely used in aircraft assembly because of the low cost, high efficiency and high quality of holes. This paper constructs a new flexible track drilling system for large-size aircraft assembly. The system structure is introduced, and the transformation algorithm between product/device coordinate system and axes position parameters is proposed. The experimental results show that the transformation algorithm has the merits of high computational efficiency and high stability, and can meet the requirement of precision drilling.

scholarly journals The design and research of the shared kitchen system in the hospital

2018 ◽  
Vol 176 ◽  
pp. 01011
Author(s):  
YE Xin ◽  
JI Qian
Keyword(s):  
Quality Of Life ◽  
Social Interaction ◽  
High Efficiency ◽  
Low Cost ◽  
Space System ◽  
High Quality ◽  
Economy Model ◽  
New Directions ◽  
The Right

The shared economy has been developing rapidly with low cost, low consumption and high environmental efficiency features under the background of internet waves. The shared economy model has emerged in housing, catering, and travel. As people look forward to high quality of life and their social interaction need, the shared kitchen platform arises at the right moment. This paper takes the shared kitchen as an example, focusing on the patients and their caregivers, the existing shared kitchens and its service platform as well as the space system design and human-computer interaction of the shared kitchen have been investigated and analysized. Taking the "high efficiency, the intelligence and the humanization" as the design principles, we are committed to exploring new directions for modular kitchen design under the background of shared economy.

Optimal Selecting Strategy for Tool Size of High Efficiency Milling of Complex Curved Surface

2014 ◽  
Vol 496-500 ◽  
pp. 1235-1239
Author(s):  
Hong Liu ◽  
Yong Zhang ◽  
Li Li Luo
Keyword(s):  
Functional Relationship ◽  
High Efficiency ◽  
Effective Area ◽  
Selection Method ◽  
Cnc Machining ◽  
Curved Surface ◽  
Machining Quality ◽  
Large Size ◽  
Combination Selection

It is an important factor that tool size affects the quality and efficiency of complex curved surface of CNC machining. This paper starts with analyzing the functional relationship between the tool size and the quality and efficiency of complex curved surface, gives the selection method of optimal minimum tool which can ensure the precision of machining curved surface, establishes optimal selecting algorithm of reasonable large size tool with the most high efficiency as the objective, and for the curved surface of complex geometric features, puts forward tool combination selection method with effective area ratio of tool machining as a reference. Application examples show: the optimal selecting strategy of tool size in this paper, under the premise of adequately ensuring the machining quality of complex curved surface, can effectively improve the whole machining efficiency.

scholarly journals Single-Seed Casting Large-Size Monocrystalline Silicon for High-Efficiency and Low-Cost Solar Cells

Engineering ◽  
2015 ◽  
Vol 1 (3) ◽  
pp. 378-383 ◽  
Author(s):  
Bing Gao ◽  
Satoshi Nakano ◽  
Hirofumi Harada ◽  
Yoshiji Miyamura ◽  
Takashi Sekiguchi ◽  
...  
Keyword(s):  
Solar Cells ◽  
High Efficiency ◽  
Low Cost ◽  
Monocrystalline Silicon ◽  
Single Seed ◽  
Large Size

A Dry Trenching Diaphragm Wall in Soft Soil

2012 ◽  
Vol 170-173 ◽  
pp. 666-669
Author(s):  
Zheng Sheng Zou ◽  
Xin Liu ◽  
Wen Qing Zhang ◽  
Qing Hua Kong
Keyword(s):  
Environmental Pollution ◽  
Water Consumption ◽  
High Efficiency ◽  
Low Cost ◽  
Soft Soil ◽  
Construction Cost ◽  
Diaphragm Wall ◽  
Environment Friendly ◽  
A New Technique

Generally, it is difficult to control the trench stability and panel joint permeability in the construction of a diaphragm wall. The high construction cost is inevitable because of the environmental pollution due to the slurry, waste of water consumption, and debris disposal treatment. A new technique, called the dry trenching diaphragm wall with self-guided double-rectangular-casing, is thereafter developed in the current study to avoid these problems. In this technique, two pieces of rectangular steel casing are driven in sequence and guided each other. The trench is made by squeezing into the soft soil. The panel alignment and straightness are assured without any joints due to the dry concrete pouring instead of the influences of the slurry. Compared to the regular diaphragm wall, the technique is an environment-friendly, less emissive and energy-conserved one by eliminating the slurry pollution with the low cost. It shows that the quality of panel connection is reliable, and the permeation-proof performance is superior with high efficiency in wall-forming due to non-joint interlocking.

scholarly journals INFLUENCE OF CHLORIDES AND SULPHATES ON QUALITY OF BIOLOGICAL WASTEWATER TREATMENT USING ENZYME PREPARATIONS

2004 ◽  
Vol 12 (3) ◽  
pp. 91-95 ◽  
Author(s):  
Audra Skaisgiriene ◽  
Pertas Vaitiekūnas ◽  
Vytenis Zabukas
Keyword(s):  
Biological Treatment ◽  
High Efficiency ◽  
Low Cost ◽  
Energy Levels ◽  
Sewage Treatment ◽  
Treatment Method ◽  
Active Sludge ◽  
Enzyme Preparations ◽  
Biochemical Oxygen Consumption

The biological treatment method is widely used in Lithuania due to its high efficiency, low cost and suitability for treating various types of wastewater. After technological processes various mineral substances, such as chlorides and sulphates, get into water bodies. These substances are not removed from wastewater by the biological treatment method. The purpose of this study is to determine the concentrations of chlorides and sulphates, investigate the influence of enzyme preparations upon quality and energy consumption and assess energy changes in the trophic food chain during biological treatment. To analyse the mineral salt influence of the biooxidation process a series of laboratory tests was carried out: biochemical oxygen consumption (BOD), activated sludge concentration and other indexes. It is found experimentally that a 400 mg/1 concentration of chlorides disarranges the activity of microorganisms, and at a 700 mg/1 concentration active sludge is no longer suitable for biological treatment. Also, we investigated the effect of a ferment preparation “Roebic” on effluence of sewage treatment. In a tank with an enzyme the total amount of energy after treatment increases by 5–30 %. It is determined by calculating the accumulation of energy in an active‐sludge system that an enzyme preparation increases the energy levels of the system.

scholarly journals Model of a new joint thread for a drilling tool and its stress analysis used in a slim borehole

2016 ◽  
Vol 7 (2) ◽  
pp. 189-200 ◽  
Author(s):  
Yu Wang ◽  
Bairu Xia ◽  
Zhiqiao Wang ◽  
Chong Chai
Keyword(s):  
Contact Stress ◽  
Theoretical Basis ◽  
High Efficiency ◽  
Low Cost ◽  
Analysis Software ◽  
Drilling Tool ◽  
Drilling Pipe ◽  
Borehole Drilling ◽  
Ansys Workbench

Abstract. The drilling pipe used in slim-borehole drilling performs well due to its low cost and high efficiency. Good sealing properties and coupling strength are the two keys to ensure that the pipe works correctly. In this paper, a 68 mm diameter drilling pipe and its joint are developed. On the basis of Lame's theory, the contact model of the joint thread is represented under different axial force, makeup torque, and pressure difference between inner and outer pipe. This model provides a good reference for judging the quality of sealing of the joint thread. The analysis software ANSYS\\Workbench is applied to stimulate the distribution of contact stress and sealing properties. A premium condition for drilling has been proposed, which provides a good theoretical basis for slim-borehole drilling.

scholarly journals Effect of phenol red dye on monocrystal growth, crystalline perfection, and optical and dielectric properties of zinc (tris) thiourea sulfate

2017 ◽  
Vol 50 (6) ◽  
pp. 1716-1724 ◽  
Author(s):  
Mohd. Shkir ◽  
V. Ganesh ◽  
S. AlFaify ◽  
K. K. Maurya ◽  
N. Vijayan
Keyword(s):  
Low Cost ◽  
Phenol Red ◽  
X Ray Diffraction ◽  
Crystalline Perfection ◽  
Absorption Bands ◽  
X Ray ◽  
Large Size ◽  
Diffraction Patterns ◽  
Red Dye

In this work, the growth of large size (∼25 × 29 × 5 mm and ∼25 × 24 × 6 mm) colorful single crystals of zinc (tris) thiourea sulfate (ZTS) in the presence of 0.05–2 wt% phenol red (PR) dye was achieved using a simple and low-cost technique. Powder X-ray diffraction patterns confirm the presence of PR dye, which is indicated by an enhancement of the Raman peak intensities, a shift in their position and the appearance of a few extra peaks. The quality of the grown crystals was assessed by high-resolution X-ray diffraction, which shows that the crystalline perfection of 1 wt% PR-dyed ZTS crystals is better than that of 2 wt% PR-dyed crystals. The measured UV–vis absorbance spectra show two additional, strong absorption bands at ∼430 and 558 nm in the dyed crystals, due to the presence of PR dye, along with a band at ∼276 nm which is present for all crystals but is slightly shifted for the dyed crystals. Photoluminescence spectra were recorded at two excitation wavelengths (λexc= 310 and 385 nm). The luminescence intensity is found to be enriched in dyed crystals, with some extra emission bands. An enhancement in the value of the dielectric constant and a.c. electrical conductivity was also observed in the dyed ZTS crystals.

scholarly journals Application of the Metal Reflector for Redistributing the Focusing Intensity of SPPs

Nanomaterials ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 937
Author(s):  
Jiaxin Ji ◽  
Pengfei Xu ◽  
Zhongwen Lin ◽  
Jiying Chen ◽  
Jing Li ◽  
...  
Keyword(s):  
High Efficiency ◽  
Theoretical Calculations ◽  
Low Cost ◽  
Near Field ◽  
Focusing Effect ◽  
Photoresist Layer ◽  
Calculation Results ◽  
Energy Flux Density ◽  
Flux Density Distribution

The near-field photolithography system has attracted increasing attention in the micro- and nano-manufacturing field, due to the high efficiency, high resolution, and the low cost of the scheme. Nevertheless, the low quality of the nano-patterns significantly limits the industrial application of this technology. Theoretical calculations showed that the reason for the poor nano-patterns is the sharp attenuation of the surface plasmon polaritons (SPPs) in the photoresist layer. The calculation results suggest that the waveguide mode, which is composed of the chromium-equivalent dielectric layer-aluminum, can facilitate the energy flux density distribution in the photoresist layer, resulting in the enhancement of the field intensity of SPPs in the photoresist layer. This reduces the linewidth of nano-patterns, while it enhances the pattern steepness. Eventually, the focusing energy of the photoresist layer can be improved. The finite-difference time-domain method was employed to simulate and verify the theoretical results. It is found that for the rotational near-field photolithography with 355 nm laser illumination, the linewidths of the nano-patterns with and without the aluminum reflector are 17.54 nm and 65.51 nm, respectively. The robustness of the experimental results implies that the application of the aluminum reflector enhances the focusing effect in the photoresist, which can broaden the application of the near-field photolithography.

scholarly journals Biosorption of Water Pollutants by Fungal Pellets

Water ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 1155 ◽  
Author(s):  
Adriana Legorreta-Castañeda ◽  
Carlos Lucho-Constantino ◽  
Rosa Beltrán-Hernández ◽  
Claudia Coronel-Olivares ◽  
Gabriela Vázquez-Rodríguez
Keyword(s):  
Large Scale ◽  
High Efficiency ◽  
Low Cost ◽  
Fungal Cell ◽  
Water Pollutants ◽  
Operational Conditions ◽  
Fungal Pellets ◽  
Water And Wastewater ◽  
Real Wastewater

Fungal biosorption is an environmental biotechnology based on the ability of the fungal cell wall to concentrate harmful water pollutants. Among its advantages are its simplicity, high efficiency, flexibility of operation, and low cost. The biosorptive performance of fungal pellets is getting growing attention since they offer process advantages over the culture of disperse mycelia, such as an enhanced biomass separation, and a high resilience in severe environmental conditions. In this review, biosorption capacity of fungal pellets towards heavy metals, dyes, phenolic compounds, humic substances, pesticides, and pharmaceuticals was reviewed. Available data about the adsorption capacity of pellets, their removal efficiency, and the operational conditions used were collected and synthesized. The studies relying on biodegradation were discarded to present only the possibilities of fungal pellets for removing these concern pollutants through biosorption. It was found that the biosorption of complex mixtures of pollutants on fungal pellets is scarcely studied, as well as the interfering effect of anions commonly found in water and wastewater. Furthermore, there is a lack of research with real wastewater and at pilot and large scale. These topics need to be further explored to take full advantage of fungal pellets on improving the quality of aquatic systems.

Modeling and Simulation of Electric-Hydraulic Clutch on Light Vehicle

2011 ◽  
Vol 383-390 ◽  
pp. 2377-2382
Author(s):  
Jin Yu Qu ◽  
Dong Wang ◽  
Yi Rui Zhang ◽  
Gui Xin Qu
Keyword(s):  
Modeling And Simulation ◽  
Control Strategy ◽  
Simple Structure ◽  
High Efficiency ◽  
Low Cost ◽  
Mechanical Transmission ◽  
Variable Control ◽  
Engagement Process ◽  
Light Vehicle

With high efficiency, simple structure and low cost, Automatic Mechanical Transmission (AMT) is suitable for the development and application of light vehicles. The control of clutch is emphasized on in the shifting process. It is necessary to study the control of engagement speed. In this paper, the electric-hydraulic clutch applied on light vehicles is modeled and the engagement process of clutch during vehicle starting simulated. After analyzing the operation quality of clutch with different engagement speeds, the speed variable control strategy is proposed. According to the strategy, engagement speed changes with the development of different operating stages. At last, the simulation is carried out to verify the feasibility and superiority of this kind of strategy.

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