Tài liệu miễn phí Kỹ Thuật - Công Nghệ
Download Tài liệu học tập miễn phí Kỹ Thuật - Công Nghệ:Kiến trúc - Xây dựng, Tự động hoá, Điện - Điện tử, Kĩ thuật Viễn thông, Cơ khí - Chế tạo máy, Năng lượng, Hoá dầu, Hoá học, Sinh học
RESEARCH THE ADSORPTION E.COLI BACTERIA OF DENATURED BENTONITE - NGHIÊN CỨU KHẢ NĂNG HẤP PHỤ VI KHUẨN E.COLI BẰNG BENTONITE BIẾN TÍNH - LÊ HỮU NGHĨA
Các yếu tố ảnh hưởng đến quá trình biến tính Bentonite Di Linh (đánh giá bằng khả năng hấp phụ vi khuẩn E.coli ) đã được khảo sát, khả năng hấp phụ tốt nhất khi biến tính tại điều kiện: nồng độ HCl là 5%, nhiệt độ là 600C, tỉ lệ rắn : lỏng là 1:3. Nghiên cứu 2 yếu tố ảnh hưởng đến quá trình hấp phụ vi sinh vật. Hiệu suất cao nhất đạt được khi thực hiện tại điều kiện: thời gian hấp phụ là 1 giờ, nồng độ Bentonite-HCl 5% là 0,05g/ml dung dịch....
8/30/2018 3:35:27 AM +00:00
Email liên hệ: hoangquang.dientu@gmail.com Nhận thực hiện hoặc hướng dẫn thiết kế sử dụng ngôn ngữ Verilog HDL trên FPGA – KIT DE1 – DE2. Chi tiết xin liên hệ email. Địa chỉ: Tp. Hồ Chí Minh Đối tượng: Sinh viên và các bạn có nhu cầu về thiết kế số Phương
Email liên hệ: hoangquang.dientu@gmail.com Nhận thực hiện hoặc hướng dẫn thiết kế sử dụng ngôn ngữ Verilog HDL trên FPGA – KIT DE1 – DE2. Chi tiết xin liên hệ email. Địa chỉ: Tp. Hồ Chí Minh Đối tượng: Sinh viên và các bạn có nhu cầu về thiết kế số Phương thức liên hệ: Bước 1: Qua email hoangquang.dientu@gmail.com để thỏa thuận về cách thức làm việc, báo giá, .. Bước 2: Gặp mặt trao đổi và liên hệ qua điện thoại trong suốt thời gian thực hiện (Chú ý: Các bạn cần liên hệ qua email trước để...
8/30/2018 3:28:03 AM +00:00
Hướng dẫn công việc chương trình nghề
Liệt kê toàn bộ các bước và kiến thức về kỹ thuật để tiến hành công việc từ lúc khởi điểm đến hoàn thành. Đánh số thứ tự các bước. Viết hoặc in rõ ràng dễ đọc. Sử dụng mặt sau của phiếu nếu cần.1. Tháo bạc xéc măng ra khỏi pít tông. 2. Lau sạch lòng xi lanh, pít tông cũ vừa mới tháo ra. 3. Quan sát pít tông để chẩn đoán tình trạng động cơ: - Nếu đầu pít tông đóng nhiều muội than mặt dưới bên trong pít tông đen là pít tông đã mòn. - Nếu pít tông bị trầy một...
8/30/2018 3:27:59 AM +00:00
ACOUSTIC EMISSION - RESEARCH AND APPLICATIONS
Acoustic emission (AE) is a phenomenon in which elastic or stress waves are emitted from rapid, localized change of strain energy in material. The practical application of the AE first emerged in the 1950's, but only in the last 20 years the science, technology and applications of AE have progressed significantly. Currently AE has become one of the most important non-destructive testing techniques, which is widely applied in: fatigue cracks detection and location in pressure vessels and pipelines, partial discharge sources detection and location in power transformers and rotating machinery, damage assessment in fibre-reinforced...
8/30/2018 2:35:45 AM +00:00
ADVANCEMENT IN MICROSTRIP ANTENNAS WITH RECENT APPLICATIONS
The Topic of microstrip antennas is an old subject that started over 40 years ago. Microstrip antennas are low profile and easily fabricated. This subject has passed through several stages that make it survive tell now and still in continues progress. The main stage is the development of low loss low cost dielectric materials that make it possible to design an effi‐ cient low profile microstrip patches. The stage of developing analysis methods and models that helped in the design of radiating...
8/30/2018 2:35:45 AM +00:00
EARTHQUAKE RESEARCH AND ANALYSIS
The purpose of this book is to present 9 scientific papers focusing on new research and re‐ sults on earthquake seismology. Chapters of this book focus on several aspect of seismology ranging from historical earthquake analysis, seismotectonics, and damage estimation of crit‐ ical facilities.
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ENGINEERING MANAGEMENT
The Engineering Management book synthesises the engineering principles with business practice, i.e. the book provides an interface between the main disciplines of engineering technology and the organizational, administrative, and planning abilities of management. I is complementary to other sub-disciplines such as economics, finance, marketing, decision and risk analysis, etc.
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The ENGINEERING SEISMOLOGY, GEOTECHNICAL AND STRUCTURAL EARTHQUAKE ENGINEERING
The mitigation of earthquake-related hazards represents a key role in the modern society. The mitigation of such kind of hazards spans from detailed studies on seismicity, evaluation of site effects, and seismo-induced landslides, tsunamis as well as and the design and analysis of structures to resist such actions. The study of earthquakes ties together science, technology and expertise in infrastructure and engineering in an effort to minimize human and material losses when they inevitably occur. Chapters deal with different topics aiming to mitigate geo-hazards such as: Seismic hazard analysis, Ground investigation for seismic design, Seismic design, as‐ sessment and remediation, Earthquake site ...
8/30/2018 2:35:45 AM +00:00
IMAGING AND RADIOANALYTICAL TECHNIQUES IN INTERDISCIPLINARY RESEARCH - FUNDAMENTALS AND CUTTING EDGE
The last quarter of the last century has witnessed major advancements that have brought imaging and radioanalytical techniques to a paramount status in life sciences and industry. Generally speaking, the scope of radiation imaging and radioanalytics covers data acquisi‐ tion, data processing, and data analysis, involving theories, methods, systems and applica‐ tions. While detection and post-processing techniques become increasingly sophisticated, traditional and emerging modalities play more and more critical roles in medical and indus‐ trial domains. The overall goal of this book...
8/30/2018 2:35:45 AM +00:00
INTERNATIONAL PERSPECTIVES ON WATER QUALITY MANAGEMENT AND POLLUTANT CONTROL
The level of surface water quality protection is variable around the world in large part due to the relative effectiveness of environmental regulation and the degree to which science influences the regulatory process. In the United States, at the federal level, the Total Maximum Daily Load (TMDL) has been an effective policy and water quality management tool for dealing with both point source and non-point source pollution. The TMDL provides a rational framework for esti‐ mating the assimilative capacity of the receiving water body for certain contaminants and ap‐ plying factors of safety and incorporating acceptable levels of water quality criteria violation - provided...
8/30/2018 2:35:45 AM +00:00
NEW DEVELOPMENTS IN RENEWABLE ENERGY
Unlike to fossil energy sources, renewable energy sources such as sunlight and wind are existed in widespread geographical areas of the world and provide important opportunities for energy efficiency. Higher growth rate in production of renewable energy and technologi‐ cal diversification of energy sources will contribute a significant energy security and sub‐ stantial economic benefits to many nations. Consequently, in developing countries, projects related to renewable energy can directly contribute to poverty alleviation via providing the energy needed for setting up businesses and employment. Also,...
8/30/2018 2:35:45 AM +00:00
OPERATIONS MANAGEMENT
Generally speaking, Operations Management is an area of business concerned with the pro‐ duction of goods and services. It involves the responsibility of ensuring that business opera‐ tions are efficient in terms of using as few resources as needed, and effective in terms of meeting customer requirements. It is concerned with managing the process that converts inputs (in the forms of materials, labour, and energy) into outputs (in the ...
8/30/2018 2:35:45 AM +00:00
OPTICAL COHERENCE TOMOGRAPHY
In 1991, optical coherence tomography (OCT) was initially introduced to image the transpar‐ ent tissue of eyes at a level of resolution significantly greater than conventional ultrasound technique. OCT uses infrared light to produce images on a micrometer scale. The intensity of the reflected light is displayed as a false color or grey scale image. OCT imaging is analo‐ gous to ultrasound B mode imaging, except that it performs imaging by measuring the in‐ tensity of reflected or back scattered light rather than acoustic...
8/30/2018 2:35:45 AM +00:00
ORBITAL INTEGRALS ON REDUCTIVE LIE GROUPS AND THEIR ALGEBRAS
In the study of the theory of irreducible unitary representations, is necessary to analyze and demonstrate diverse results on integral orbital of functions belonging to the cohomology Hi (g, K; V V*), and that it is wanted they belong to the L2(G)-cohomology of their reducible unitary representations called discrete series. Then is necessary consider the Frèchet space I(G), and analyze the 2-integrability to the fibers of the space G/K, in spaces or locally compact components of G/K. For it will be useful the invariance of the corresponding measures of Haar under the actions of Ad(G), and the...
8/30/2018 2:35:45 AM +00:00
Surface Chemistry
Carbon-based nanoparticles and nanostructures, such as carbon nanotubes (CNTs), have drawn great attention in both academia and industry due to their wide potential applica‐ tions. Owing to their well-defined one-dimensional (1D) interior, CNTs serve as desirable materials for encapsulating molecules, such as water [1-4], ionic liquid [5], drug molecules [6], and biomolecules [7]. The nanoscale confinement of CNTs have considerable impact on the inner molecules, including changes in their structure, size distribution, surface area, and dynamics, thus leading to many interesting and striking properties that are quite different from those in bulk [1-5, 7-9]. For example, nanoscale confinement of CNTs can give rise to ordered structure and extra-fast...
8/30/2018 2:35:45 AM +00:00
PHYSICAL AND CHEMICAL PROPERTIES OF CARBON NANOTUBES
Carbon nanotubes are rolled up graphene sheets with a quasi-one-dimensional structure of nanometer-scale diameters. More than twenty years have passed since the pioneering work on carbon nanotubes by Prof. Iijima in 1991. During all these years, carbon nanotubes have at‐ tracted a lot of attention from physicists, chemists, material scientists, and electronic device engineers because of their excellent structural, electronic, optical, chemical, and mechanical properties. Most of these unique properties mainly originate in the parent material, graphene, which has also been very intensively studied as a Dirac Fermion system in more recent years. Carbon nanotube research, especially that aiming at industrial applications is becoming more important, and...
8/30/2018 2:35:45 AM +00:00
PIEZOELECTRIC MATERIALS AND DEVICES- PRACTICE AND APPLICATIONS
Piezoelectricity from the Greek word piezo means pressure electricity. Certain crystalline substances generate electric charges under mechanical stress and conversely experience a mechanical strain in the presence of an electric field. The piezoelectric effect was discovered in some naturally occurring materials in the 1880s. However it was not until the Second World War that man-made polycrystalline ceramic ma‐ terials were produced that also showed piezoelectric properties. Quartz and other natural crystals found application in microphones, accelerometers and ultrasonic transducers, whilst the advent of...
8/30/2018 2:35:45 AM +00:00
SEDIMENT TRANSPORT PROCESSES AND THEIR MODELLING APPLICATIONS
Sediment Transport Processes and their Modelling Applications is a book which covers a wide range of topics. The effective management of many aquatic environments, requires a detailed understanding of sediment dynamics. This has both environmental and economic implications, especially where there is any anthropogenic involvement. Numerical models are often the tool used for predicting the transport and fate of sediment movement in these situations, as they can estimate the various spatial and temporal fluxes. However, the physi‐ cal sedimentary processes can vary quite considerably depending upon whether the local sediments are ...
8/30/2018 2:35:45 AM +00:00
SOLAR CELLS - RESEARCH AND APPLICATION PERSPECTIVES
Over the last decade, PV technology has shown the potential to become a major source of power generation for the world – with robust and continuous growth even during times of financial and economic crisis. That growth is expected to continue in the years ahead as worldwide awareness of the advantages of PV increases. At the end of 2009, the world’s PV cumulative installed capacity was approaching 23 GW. One year later it was 40 GW. In 2011, more than 69 GW are installed globally and...
8/30/2018 2:35:45 AM +00:00
STATE OF THE ART IN BIOSENSORS - GENERAL ASPECTS
Biosensors, constituting cheap and rapid alternate to traditional analytical equipment, have been in the focus of scientific research already for 50 years, since the initial biosensor con‐ cept was proposed in 1962 by Clark and Lyons. Throughout this half century, the number of studies dedicated to the research and applications of biosensor – based techniques is exceed‐ ing 200,000; including those over 14,000 published in 2012.
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STATE OF THE ART IN BIOSENSORS - ENVIRONMENTAL AND MEDICAL APPLICATIONS
At present, the main field of biosensor applications is still the determination of blood glu‐ cose, as over 90% of all commercial biosensors are developed for diabetes control. However, regardless of the remarkable success in the development of glucose biosensors, there are nu‐ merous other emerging fields to be addressed, particularly the monitoring of environment, healthcare and medical diagnostics. Biosensor based technologies form a promising plat‐ form for continuous in-site examination of the markers of the quality of surrounding envi‐ ronment and potentially hazardous compounds, enabling the achieving of...
8/30/2018 2:35:45 AM +00:00
THEORY AND APPLICATIONS OF MONTE CARLO SIMULATIONS
The objective of this book is to introduce recent advances and state-of-the-art applications of Monte Carlo Simulation (MCS) in various fields. MCS is a class of statistical methods for performance analysis and decision making based on taking random samples from underly‐ ing systems or problems to draw inferences or estimations. Let us make an analogy by using the structure of an umbrella to define and exemplify the position of this book within the fields of science and engineering. Imagine that one can place MCS at the centerpoint of an umbrella and define the...
8/30/2018 2:35:45 AM +00:00
ULTRA-WIDEBAND RADIO TECHNOLOGIE FOR COMMUNICATIONS, LOCALIZATION AND SENSOR APPLICATIONS
Sometimes history seems to repeat. Even in the so-called ‘mature’ technological fields. When the radio pioneers such as Heinrich Hertz, Guglielmo Marconi, and Alexander Stepanovich Popov made their first experiments of wireless transmission more than a hundred years ago using spark-gap transmitters with simple coherer-detectors they did not care which ‘frequency band’ they were using, nor did they worry about their signals being ‘spectrally efficient’ or ‘band limited’. The world of radio frequency regulation was very simple then since regulations have not yet existed. Over the years this has dramatically changed. The frequency band was subdivided into small ‘boxes’ of...
8/30/2018 2:35:45 AM +00:00
WIND TUNNEL DESIGNS AND THEIR DIVERSE ENGINEERING APPLICATIONS
Human efforts to conquer flight, land on the moon, go beyond the earth and discover new universes would have been difficult without the development of wind tunnels. The early 18th and 19th century aerodynamists used whirling arm to study various shapes which suf‐ fered from a major fault that the body under investigation was forced to fly in its own un‐ disturbed wake. This has lead to the development of wind tunnels to overcome the problem.
8/30/2018 2:35:45 AM +00:00
The Other Likeness
Tham khảo sách 'the other likeness', kỹ thuật - công nghệ phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả
8/30/2018 2:18:38 AM +00:00
Công nghệ đúc và chế tạo sản phẩm
Công nghệ đúc là công nghệ chế tạo sản phẩm bằng phương pháp rót vật liệu ở dạng chảy lỏng vào khuôn để tạo ra sản phẩm có hình dạng theo khuôn mẫu. Đa phần công nghệ đúc thực hiện với các vật liệu kim loại. Công nghệ đúc được chia thành hai loại chính: Đúc thông thường và Đúc đặc biệt.
8/30/2018 2:10:32 AM +00:00
Giúp bạn sử dụng điều hòa hiệu quả và tiết kiệm điện
Trong những ngày nắng oi ả hay trời mưa rét mướt thì việc có một chiếc điều hòa trong phòng sẽ là một điều tuyệt vời. Vì vậy, những cách đơn giản giúp người sử dụng chọn được một sản phẩm ưng ý đang được nhiều người quan tâm. Cuộc sống hiện đại đã giúp những chiếc điều hòa trở nên gần gủi hơn với không ít gia đình Việt Nam. Tuy nhiên, để có thể chọn được những chiếc điều hòa ưng ý và phù hợp với không gian của từng gia đình, thì không phải ai cũng biết....
8/30/2018 1:53:13 AM +00:00
Furniture Catalog: Questions? Call Customer Service at 1-800-770-2268.
The first study (Sulandjari and Rupidara 2003, cited in Posthuma 2003) found 11 568 workers in 2000, which is nine times less than what we found (probably at least 108 000 workers in 2000). Similarly, Sandee et al. (2002, cited in Posthuma 2003), found 44 000 workers in 2002, which is three times less than what we found (at least 140 000 workers in 2002). Finally the Indonesian administration (District Office of Industry 2005, cited in Loebis and Schmitz 2005), found 58 210 workers in 2002, or two times less than our findings. Another paper estimates the number of workers...
8/30/2018 1:49:15 AM +00:00
Bamboo furniture “Where western design meets indian tradition”
At the Kabupaten level, the average relative cash flow per worker is 74 million Rp (with 95% confidence limits of 70 to 78 million Rp), but the dispersion is high and the spatial heterogeneity among villages is considerable (Figure 18). In some villages, the added value per worker is less than 1 million Rp/year, while others produce more than 600 million Rp/year/worker. There is no clear explanation for the differences, as they are not obviously linked to either the industrial or spatial concentrations. The pattern probably reflects the existence of specialised businesses, scattered across the area. Further investigations are needed...
8/30/2018 1:49:15 AM +00:00