Xem 1-20 trên 57 kết quả Mass range
  • Giúp quý thầy cô và các em học sinh có thể chuẩn bị tốt cho tiết học The mass media, giới thiệu đến mọi người bộ sưu tập bài giảng của bài đã được chọn lọc. Với những bài giảng này, giáo viên dễ dàng và thuận lợi hơn trong việc tìm kiếm tài liệu cho tiết học, rút ra được một số kinh nghiệm trong việc thiết kế bài giảng, nhờ những bài giảng này các bạn sẽ tiết kiệm được thời gian chuẩn bị bài.

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  • ESI greatly enhanced the ability to characterize protein and peptides by MS.  ESI requires the sample of interest to be in solution- flow in to the ionization source region.  To ionize the sample, high voltage is applied, result in the sample becoming positively or negatively charged; however, positive ionization is used primarily in the analysis proteins and peptides.  As it exits the spray tip, the solution produces submicrometer-sized droplets containing both solute and analyte ions. The sample is then desorbed of solute prior to entering the analyzer region....

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  • Tham khảo sách 'long range ballistic missile defense in europe', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

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  • Engineers use the concepts and methods of mechanics of solids in designing and evaluating tools, machines, and structures, ranging from wrenches to cars to spacecraft. The required educational back ground for these includes courses in statics, dynamics, mechanics of materials, and related subjects.

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  • ngành cơ khí, động cơ máy, nguyên lí hoạt động, hệ thống máy móc, cơ khí hóa, động cơ máy móc, chế tạo động cơ Nhớ rằng khả năng chịu nhiệt được định nghĩa là R t ≡ ΔT / q sau đó cho hình trụ rỗng, Rt = ln (ro / Giả sử k là hằng số, tỷ lệ nhiệt qr = 2π Lc (Ti -) ln (ro / ri).

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  • Satellite altimetry was developed in the 1960s soon after the flight of artificial satellites became a reality. From the vantage point in space, a radar altimeter is able to measure the shape of the sea surface globally and frequently. Such measurements have a wide range of applications to oceanography, geodesy, and geophysics. The results are often revolutionary. For example, in oceanography; it takes a ship weeks or months to cross the ocean making measurements while the ocean is constantly changing its circulation, temperature, and salinity.

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  • Flow cytometry is a technology that simultaneously measures and analyses multiple physical characteristics of single particles, usually cells, as they flow in a fluid stream through a beam of light. The properties measured include a particle’s relative size (represented by forward angle light scatter), relative granularity or internal complexity (represented by right-angle scatter), and relative fluorescence intensity.

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  • With the amazing advances of scientific research, Hydrodynamics - Theory and Application presents the engineering applications of hydrodynamics from many countries around the world. A wide range of topics are covered in this book, including the theoretical, experimental, and numerical investigations on various subjects related to hydrodynamic problems. The book consists of twelve chapters, each of which is edited separately and deals with a specific topic. The book is intended to be a useful reference to the readers who are working in this field....

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  • The Janus kinase–signal transducer and activator of transcription (JAK–STAT) pathway is utilized by a range of cytokines (interferons, IL-2 and IL-6 amongst others) that control survival, proliferation and differentiation responses in diverse cell types. The realisation that unregulated activation of this pathway is a key driver of not only chronic inflammatory diseases such as rheumatoid arthritis, colitis and psoriasis, but also many cancers has identified its components as targets for therapeutic intervention by small molecule inhibitors and biologicals.

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  • On 21 March 1990 John Hammersley celebrates his seventieth birthday. A number of his colleagues and friends wish to pay tribute on this occasion to a mathematician whose exceptional inventiveness has greatly enriched mathematical science. The breadth and versatility of Hammersley’s interests are remarkable, doubly so in an age of increased specialisation. In a range of highly individual papers on a variety of topics, he has theorised, and posed (and solved) problems, thereby laying the foundations for many subjects currently under study.

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  • sự khác biệt bằng cách sử dụng một trong hai phương pháp ngầm hay rõ ràng, (c) Với một tăng thời gian Δt = 5 s, có được giá trị của Tm cho 45s đầu tiên trôi qua thời gian, xác định thông lượng nhiệt tương ứng tại biên giới, và (d) xác định ảnh hưởng của kích thước mắt lưới bằng cách lặp lại những phân tích nêu trên bằng cách sử dụng lưới trong 5 và 11 điểm nút. sCHEMATIC:

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  • The sample of banks includes FDIC-insured commercial banks with total assets greater than $300 million as of March 1996. Of these institutions, banks that have no commercial and industrial loans are excluded. The sample ranges from 942 banks in March of 1996 to 467 banks in December of 2004. Institutions that are liquidated during the sample period are included in the sample before liquidation and excluded from the sample for the periods after liquidation. Banks that merge during the sample period are included in the sample.

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  • The major symptom of the acute form of the disease is severe anaemia. However, in camels the disease due to T. evansi is usually chronic. This is typically shown in slow weight loss, intermittent high fever, general muscular weakness, especially in hind quarters, pale mucous membranes and collection of fluid, especially in the abdominal region. Packed cell volumes of blood plasma are usually 18-20% in infected animals compared to an average of 30% (range 24-42%) in healthy ones.

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  • Giả định: (1) không rõ ràng, bề mặt khuếch tán màu xám hành vi, (2) Như và Quảng cáo có thể được xấp xỉ như các khu vực khác biệt. Phân tích bức xạ bị chặn bởi máy dò là do khí thải và sự phản xạ từ bề mặt, và từ định nghĩa của cường độ, nó có thể được diễn tả như

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  • This second edition presents new chapters on (a) the utilization of mutants as highresolution nanosensors of short-living protein structures and protein nanophysics (Chap. 11) and (b) the recently developed method of evolutionary computer programming (Chap. 12), respectively. In the latter method, computer programs evolve themselves towards a higher performance. In contrast to simple selflearning programs, the code of the evolved program differs significantly from that of the original "wild-type" program.

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  • In themanagement of privacy, organizations focus on two types of threats: Deliberatemisuse of information or theft of information can range from incidents where employees deliberately remove proprietary information, including trade secrets, customer lists, or financial data, and provide that information to unauthorized parties. The second type of internal threat stems from ignorance or carelessness in how proprietary data and information is used.

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  • Engineering is the application of scientific, economic, social, and practical knowledge in order to design, build, and maintain structures, machines, devices, systems, materials and processes. It may encompass using insights to conceive, model and scale an appropriate solution to a problem or objective. The discipline of engineering is extremely broad, and encompasses a range of more specialized fields of engineering, each with a more specific emphasis on particular areas of technology and types of application....

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  • Possibly the first work of note on HSM was that of Salomon who ran a series of applied experiments from the period 1924 to 1931, when a German Patent was granted for this work. The Patent was founded upon a series of cutting speed curves plotted against machining temperatures for a range of materials (Fig. 214). In these tests Salomon achieved peripheral cutter speeds of 16,500 m min–1, utilising either fly-cutters – for chip morphology data, or helical milling cutters – notably when cutting aluminium. Salomon contended that the cutting temperature ‘peaked’ at a specific cutting...

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  • Robotics is the application of mechatronics to create robots, which are often used in industry to perform tasks that are dangerous, unpleasant, or repetitive. These robots may be of any shape and size, but all are preprogrammed and interact physically with the world. To create a robot, an engineer typically employs kinematics (to determine the robot's range of motion) and mechanics (to determine the stresses within the robot).

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  • There are many different types of upholstered chairs and sofas, and they vary widely in quality. Most of the quality characteristics are similar for all upholstered items. There are, however, a few home furnishing items such as recliners and sleeper sofas that have additional quality characteristics. A high price tag does not necessarily indicate quality. High-quality and low-quality upholstered furniture can be found in all price ranges. High-quality upholstery is difficult to evaluate because you cannot see inside the furniture. There are, however, methods of determining quality.

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