scholarly journals Formation of wells for underground engineering communications by a screw working body

2021 ◽  
pp. 63-65
Author(s):  
Vladimir Suponev ◽  
Vitaly Rugulin
Keyword(s):  
New Method ◽  
Practical Implementation ◽  
Underground Engineering ◽  
Underground Utilities

A new method of creating soil cavities for trenchless laying of underground utilities with the help of a screw working body is proposed. The calculated dependences are obtained and the estimation for practical implementation is given.

scholarly journals Новый метод измерения показателя преломления текущей жидкости

2021 ◽  
Vol 129 (7) ◽  
pp. 954
Author(s):  
В.В. Давыдов ◽  
А.В. Мороз ◽  
Д.И. Николаев
Keyword(s):  
Refractive Index ◽  
Laser Radiation ◽  
Vertical Section ◽  
Experimental Studies ◽  
New Method ◽  
Practical Implementation ◽  
Multiple Reflections ◽  
Optical Elements ◽  
Flowing Liquid ◽  
Flow Through

The necessity of developing a new method for measuring the refractive index of a liquid in a turbulent mode of its flow in a pipeline is substantiated. A new method for measuring the refractive index of a medium n is presented. For its practical implementation, a new design of a flow-through refractometer has been developed, which makes it possible to measure n in both laminar and turbulent fluid flow. A new design of the optical part of the refractometer is considered. A new way of placing it on the vertical section of the pipeline for measuring n is proposed. All this makes it possible to make insignificant the influence on the measurement result of n flowing liquid of errors associated with multiple reflections of laser radiation from optical elements, with the formation of voids or vortex flows in the pipeline and with temperature fluctuations. In the design of a refractometer with a new method for measuring n, there are no restrictions on determining the value of n of a flowing liquid, in contrast to the used industrial flow-through refractometers, the principle of which is based on the phenomenon of total internal reflection of laser radiation at the interface of two media. The results of experimental studies of various media are presented.

A New Subway Station Construction Method: Top-Down Boring with Cast-In-Situ Arch

2014 ◽  
Vol 501-504 ◽  
pp. 1706-1710
Author(s):  
Mei Qun Huang ◽  
De Yun Ding ◽  
Xiu Ren Yang ◽  
Chen Wang
Keyword(s):  
Construction Method ◽  
New Method ◽  
Subway Station ◽  
Engineering Practice ◽  
Top Down ◽  
Underground Engineering ◽  
Urban Mass Transit ◽  
New Construction ◽  
Design Calculations

With the speedy development of urban mass transit in China, more and more building environment problems are coming forth in many cities. How to choose available construction method to fast, safely and economically build subway engineering is worthy to be urgently studied. A new-type subway station construction method called top-down boring with cast-in-situ arch is presented through a large number of design calculations, research and analysis, on the basis of conscientiously analyzing traditional tunneling methods and engineering practice. Some advantages of this new method are briefly introduced, compared with the shallow mining methods for underground engineering construction, as well as its application in subway engineering. According to further study, this new construction method will be widely used in underground engineering projects. At the same time, the relative theory of this new method will be validated and promoted.

Practical implementation of the barometric method for measurement of tidal volume

1980 ◽  
Vol 49 (6) ◽  
pp. 1107-1115 ◽  
Author(s):  
R. A. Epstein ◽  
M. A. Epstein ◽  
G. G. Haddad ◽  
R. B. Mellins
Keyword(s):  
Tidal Volume ◽  
New Method ◽  
Practical Implementation ◽  
Base Line ◽  
Gas Composition ◽  
Complex Problems

The barometric method is unique in permitting measurement of tidal volume in a totally noninvasive manner. Its application and accuracy have been limited by several complex problems. These include control of inspired gas composition, base-line stability, and asymmetry of processes occurring during inspiration and expiration. A new method is described that addresses these problems and facilitates long-term measurements. New calculations, which avoid previous errors that caused the method to systematically underestimate tidal volume, are illustrated.

scholarly journals Radar Beam Tracing Methods Based on Atmospheric Refractive Index

2014 ◽  
Vol 31 (12) ◽  
pp. 2650-2670 ◽  
Author(s):  
Yuefei Zeng ◽  
Ulrich Blahak ◽  
Malte Neuper ◽  
Dorit Jerger
Keyword(s):  
Refractive Index ◽  
Ad Hoc ◽  
Beam Propagation ◽  
New Method ◽  
Actual State ◽  
Practical Implementation ◽  
Atmospheric Conditions ◽  
Radar Beam ◽  
Snell’S Law ◽  
Snell's Law

Abstract Simulation of radar beam propagation is an important component of numerous radar applications in meteorology, including height assignment, quality control, and especially the so-called radar forward operator. Although beam propagation in the atmosphere depends on the refractive index and its vertical variation, which themselves depend on the actual state of the atmosphere, the most common method is to apply the 4/3 earth radius model, based on climatological standard conditions. Serious deviations from the climatological value can occur under so-called ducting conditions, where radar beams at low elevations can be trapped or propagate in a waveguide-like fashion, such that this model is unsuitable in this case. To account for the actual atmospheric conditions, sophisticated methods have been developed in literature. However, concerning the practical implementation of these methods, it was determined that the description in the literature is not always complete with respect to possible pitfalls for practical implementations. In this paper, a revised version of an existing method (one example for the above-mentioned “pitfall” statement) is introduced that exploits Snell’s law for spherically stratified media. From Snell’s law, the correct sign of the local elevation is a priori ambiguous, and the revised method explicitly applies (i) a total reflection criterion and (ii) another ad hoc criterion to solve the problem. Additionally, a new method, based on an ordinary differential equation with respect to range, is proposed in this paper that has no ambiguity. Sensitivity experiments are conducted to investigate the properties of these three methods. The results show that both the revised and new methods are robust under nonstandard conditions. But considering the need to catch an elevation sign ambiguity in the revised method (which cannot be excluded to fail in rare instances), the new method is regarded as more robust and unproblematic, for example, for applications in radar forward operators.

scholarly journals Universal rapid method of assessment and management decision-making of situational problems in the enterprise

2019 ◽  
Vol 81 (2) ◽  
pp. 359-376
Author(s):  
D. A. Shageev ◽  
T. A. Chuhonceva
Keyword(s):  
Decision Making ◽  
Information Technologies ◽  
New Method ◽  
Management Decision ◽  
Practical Implementation ◽  
Benjamin Franklin ◽  
Management Decision Making ◽  
High Level ◽  
Method Of Evaluation ◽  
Method Of Assessment

Situational approach in management does not lose its relevance for a hundred years. During this time he constantly developed, being a part of various concepts, methodologies, methods, techniques and other forms of theoretical and practical implementation of scientific thought in different areas of human activity. The results of the analysis of scientific sources in the article over the past eight years confirmed the presence of the situational approach unlimited development potential. As one of the ways to develop the situational approach, the authors propose a new method of evaluation and management decision-making problems of a situational nature in the enterprise. In contrast to the existing methods, the proposed method is characterized by a high level of efficiency and versatility. The methodology provides decisions to the problems of situational nature of the three categories of complexity. For each category there are special forms in the form of different hierarchies. To reduce the number of possible errors and improve the efficiency of the methodology implementation, a special algorithm, as well as the necessary instructions for users, have been developed and presented. In addition, various information technologies are provided as tools for the implementation of the methodology. The method of analysis of T. Saati hierarchies was used as the core of the new method. The method of decision-making by Benjamin Franklin was adopted as a complement of the method. The final part of the article presents the results of testing the proposed method. In the majority of users of a technique really noted its universal and express properties. Thus, according to the results of testing at the enterprises, the technique is recognized as effective and viable.

An Overview of Digital Image Processing and Recognition (Invited Paper)

1982 ◽  
Vol 40 ◽  
pp. 700-702
Author(s):  
R. C. Gonzalez
Keyword(s):  
Image Processing ◽  
New York ◽  
Digital Image Processing ◽  
Digital Image ◽  
Practical Implementation ◽  
Submarine Cable ◽  
Vigorous Growth ◽  
Digitized Pictures ◽  
Processing Techniques ◽  
And Storage

Interest in digital image processing techniques dates back to the early 1920's, when digitized pictures of world news events were first transmitted by submarine cable between New York and London. Applications of digital image processing concepts, however, did not become widespread until the middle 1960's, when third-generation digital computers began to offer the speed and storage capabilities required for practical implementation of image processing algorithms. Since then, this area has experienced vigorous growth, having been a subject of interdisciplinary research in fields ranging from engineering and computer science to biology, chemistry, and medicine.

Selective Sampling and Orientation of Non-Homogeneous Tissues

1968 ◽  
Vol 26 ◽  
pp. 98-99
Author(s):  
C. C. Clawson ◽  
L. W. Anderson ◽  
R. A. Good
Keyword(s):  
Electron Microscopy ◽  
Electron Microscope ◽  
Light Microscopy ◽  
Random Sampling ◽  
New Method ◽  
Microscope Examination ◽  
Small Areas ◽  
Selective Sampling ◽  
Large Numbers ◽  
Specific Orientation

Investigations which require electron microscope examination of a few specific areas of non-homogeneous tissues make random sampling of small blocks an inefficient and unrewarding procedure. Therefore, several investigators have devised methods which allow obtaining sample blocks for electron microscopy from region of tissue previously identified by light microscopy of present here techniques which make possible: 1) sampling tissue for electron microscopy from selected areas previously identified by light microscopy of relatively large pieces of tissue; 2) dehydration and embedding large numbers of individually identified blocks while keeping each one separate; 3) a new method of maintaining specific orientation of blocks during embedding; 4) special light microscopic staining or fluorescent procedures and electron microscopy on immediately adjacent small areas of tissue.

P20 phosphor on polyimide as a large area high-resolution transmission screen for slow scan CCD systems

1995 ◽  
Vol 53 ◽  
pp. 20-21
Author(s):  
C. C. Ahn ◽  
S. Karnes ◽  
M. Lvovsky ◽  
C. M. Garland ◽  
H. A. Atwater ◽  
...  
Keyword(s):  
Mechanical Stability ◽  
High Energy ◽  
Practical Implementation ◽  
Line Pair ◽  
Modulation Transfer ◽  
Large Area ◽  
Ccd Imaging ◽  
Transmission Electron ◽  
The One ◽  
Beam Broadening

The bane of CCD imaging systems for transmission electron microscopy at intermediate and high voltages has been their relatively poor modulation transfer function (MTF), or line pair resolution. The problem originates primarily with the phosphor screen. On the one hand, screens should be thick so that as many incident electrons as possible are converted to photons, yielding a high detective quantum efficiency(DQE). The MTF diminishes as a function of scintillator thickness however, and to some extent as a function of fluorescence within the scintillator substrates. Fan has noted that the use of a thin layer of phosphor beneath a self supporting 2μ, thick Al substrate might provide the most appropriate compromise for high DQE and MTF in transmission electron microcscopes which operate at higher voltages. Monte Carlo simulations of high energy electron trajectories reveal that only little beam broadening occurs within this thickness of Al film. Consequently, the MTF is limited predominantly by broadening within the thin phosphor underlayer. There are difficulties however, in the practical implementation of this design, associated mostly with the mechanical stability of the Al support film.

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