Field Measurements on Micro-Climate and Cooling Effect of River Wind on Blocks near the River in Wuhan

2011 ◽  
Vol 361-363 ◽  
pp. 1197-1203
Author(s):  
Yan Yan Huang ◽  
Hong Chen ◽  
Ying Cai ◽  
Li Yuan
Keyword(s):  
Urban Planning ◽  
Field Measurement ◽  
Yangtze River ◽  
Field Measurements ◽  
Cooling Effect ◽  
Architecture Design ◽  
Climate Effects ◽  
Adjustment Mechanism

The special climate effects of waterbody have greater influence on the micro-climate of waterfront. Therefore, taking a typical block alongside Yangtze River as example, the researchers make the field measurement of micro-climate at fixed locations and analyze cooling effect of river wind. It aims to find out the micro-climate adjustment mechanism of Yangtze River, thus providing a guidance for urban planning and architecture design.

Study of Comparison between Effects on Micro-Climate of Two Sides of Yangtze River with River Wind in Wuhan in Winter

2011 ◽  
Vol 361-363 ◽  
pp. 1177-1181 ◽  
Author(s):  
Ying Cai ◽  
Hong Chen ◽  
Li Yuan ◽  
Gan Bo Han ◽  
Yan Yan Huang
Keyword(s):  
Urban Planning ◽  
Field Measurement ◽  
Yangtze River ◽  
Thermal Environment ◽  
Typical Representative ◽  
Climatic Adaptation ◽  
Actual Effect ◽  
Big Cities ◽  
Two Sides

Wuhan is a typical representative of the big cities belted along with Yangtze River, We can collect relevant date, analyze the situation of wind and thermal environment in this area, by field measurement on the two typical blocks beside the river, to get to grasp the actual effect of river wind on the waterfront.With the study on the adjustment rule of the large-scare water to the micro-climate, the guidance for the urban planning based on the climatic adaptation could be putted forward.

Atomic 2D electric field imaging of a Yagi–Uda antenna near-field using a portable Rydberg-atom probe and measurement instrument

2020 ◽  
Vol 9 (5) ◽  
pp. 305-312
Author(s):  
Ryan Cardman ◽  
Luís F. Gonçalves ◽  
Rachel E. Sapiro ◽  
Georg Raithel ◽  
David A. Anderson
Keyword(s):  
Electric Field ◽  
Electric Fields ◽  
Field Measurement ◽  
Near Field ◽  
Measurement Instrument ◽  
Rydberg Atom ◽  
Field Measurements ◽  
Atom Probe ◽  
Electric Field Measurement ◽  
Measurement Uncertainties

AbstractWe present electric field measurements and imaging of a Yagi–Uda antenna near-field using a Rydberg atom–based radio frequency electric field measurement instrument. The instrument uses electromagnetically induced transparency with Rydberg states of cesium atoms in a room-temperature vapor and off-resonant RF-field–induced Rydberg-level shifts for optical SI-traceable measurements of RF electric fields over a wide amplitude and frequency range. The electric field along the antenna boresight is measured using the atomic probe at a spatial resolution of ${\lambda }_{RF}/2$ with electric field measurement uncertainties below 5.5%, an improvement to RF measurement uncertainties provided by existing antenna standards.

scholarly journals Attitude Estimation of Underwater Vehicles Using Field Measurements and Bias Compensation

Sensors ◽  
2019 ◽  
Vol 19 (2) ◽  
pp. 330 ◽  
Author(s):  
Nak Ko ◽  
Seokki Jeong ◽  
Suk-seung Hwang ◽  
Jae-Young Pyun
Keyword(s):  
Magnetic Field ◽  
Field Measurement ◽  
Field Measurements ◽  
Underwater Vehicle ◽  
Field Vector ◽  
Attitude Estimation ◽  
Magnetic Field Measurement ◽  
Euler Angles ◽  
Measured Field ◽  
The Magnetic Field

This paper proposes a method of estimating the attitude of an underwater vehicle. The proposed method uses two field measurements, namely, a gravitational field and a magnetic field represented in terms of vectors in three-dimensional space. In many existing methods that convert the measured field vectors into Euler angles, the yaw accuracy is affected by the uncertainty of the gravitational measurement and by the uncertainty of the magnetic field measurement. Additionally, previous methods have used the magnetic field measurement under the assumption that the magnetic field has only a horizontal component. The proposed method utilizes all field measurement components as they are, without converting them into Euler angles. The bias in the measured magnetic field vector is estimated and compensated to take full advantage of all measured field vector components. Because the proposed method deals with the measured field independently, uncertainties in the measured vectors affect the attitude estimation separately without adding up. The proposed method was tested by conducting navigation experiments with an unmanned underwater vehicle inside test tanks. The results were compared with those obtained by other methods, wherein the Euler angles converted from the measured field vectors were used as measurements.

THE COMPARISON OF SLAB DEFLECTION BASED ON FIELD MEASUREMENT, MANUAL CALCULATION (LEVY METHOD) AND FINITE ELEMENT METHOD (PROGRAM SAP 2000)

2016 ◽  
Vol 78 (5) ◽  
Author(s):  
Irpan Hidayat ◽  
Made Suangga ◽  
Fransiscus Leonardo ◽  
Godeliva Juliastuti
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Field Measurement ◽  
Concrete Slab ◽  
Field Measurements ◽  
Large Numbers ◽  
Support Element ◽  
Simple Support ◽  
Manual Calculation ◽  
Element Method

Concrete slab is a structural system that uses beams as a support element slab. The placement of beams at the whole edges of slab, so that the load received by the slab can be transfer into beams. The slab will be deformed/deflection when the loads are given. The value of slab deflection is dependent on the placement of beam support at the edges. This research was conducted on the two boundary condition that is simple support at the two edges and rigid support at whole edges. Calculating the value of deflection based on the results of field measurements and then compared with Marcus Levy method and Finite element method (FEM). Based on the study, the numbers of mesh affected to the value of deflection. The results of deflection with Program SAP 2000 will be approached deflection by Method M. Levy for the mesh division with large numbers. The deflection of slab on the field measurement approached manual calculations and Program SAP2000 with a simple support at the surrounding the edges.  The comparison of deflection was obtained for the simple support based on manual calculations and field measurement has a difference of 0.3% - 1%. Where the value of deflection on the field measurement is smaller than the manual calculation.

scholarly journals Long-Term Performance of Trestle Bridges: Case Study of an Indonesian Marine Port Structure

2020 ◽  
Vol 8 (5) ◽  
pp. 358 ◽  
Author(s):  
Yusak Oktavianus ◽  
Massoud Sofi ◽  
Elisa Lumantarna ◽  
Gideon Kusuma ◽  
Colin Duffield
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Service Life ◽  
Field Measurement ◽  
Field Measurements ◽  
Element Analysis ◽  
Moment Capacity ◽  
Non Destructive

A precast reinforced concrete (RC) T-beam located in seaport Terminal Peti Kemas (TPS) Surabaya built in 1984 is used as a case study to test the accuracy of non-destructive test techniques against more traditional bridge evaluation tools. This bridge is mainly used to connect the berth in Lamong gulf and the port in Java Island for the logistic purposes. The bridge was retrofitted 26 years into its life by adding two strips of carbon fiber reinforced polymer (CFRP) due to excessive cracks observed in the beams. Non-destructive field measurements were compared against a detailed finite element analysis of the structure to predict the performance of the girder in terms of deflection and moment capacity before and after the retrofitting work. The analysis was also used to predict the long-term deflections of the structure due to creep, crack distribution, and the ultimate moment capacity of the individual girder. Moreover, the finite element analysis was used to predict the deflection behavior of the overall bridge due to vehicle loading. Good agreement was obtained between the field measurement and the analytical study. A new service life of the structure considering the corrosion and new vehicle demand is carried out based on field measurement using non-destructive testing. Not only are the specific results beneficial for the Indonesian port authority as the stakeholder to manage this structure, but the approach detailed also paves the way for more efficient evaluation of bridges more generally over their service life.

scholarly journals FIELD MEASUREMENTS ON THE COOLING EFFECT OF THE IMPERIAL PALACE AND ITS THERMAL INFLUENCE ON THE SURROUNDING BUILT UP AREA

2011 ◽  
Vol 76 (666) ◽  
pp. 705-713 ◽  
Author(s):  
Ken-ichi NARITA ◽  
Hirofumi SUGAWARA ◽  
Hitoshi YOKOYAMA ◽  
Ikusei MISAKA ◽  
Dai MATSUSHIMA
Keyword(s):  
Field Measurements ◽  
Cooling Effect ◽  
Imperial Palace ◽  
Thermal Influence

scholarly journals The influence of the tire inflation on pull properties of agriculture tractors

2013 ◽  
Vol 61 (6) ◽  
pp. 1733-1739
Author(s):  
Jakub Katrenčík ◽  
František Bauer ◽  
Petr Dostál
Keyword(s):  
Fuel Economy ◽  
Field Measurement ◽  
High Performance ◽  
Field Measurements ◽  
Reliable Operation ◽  
Multiple Methods ◽  
Tire Pressure ◽  
Wheel Slip ◽  
Agricultural Tractors ◽  
Engine Power

Agricultural tractors are robust and versatile machines, which must comply with the basic requirements of users under various conditions. The main requirements include economical and reliable operation and high performance. Fuel economy could be improved using multiple methods, for example a well trained operator, adequate farming conditions and optimal tire inflation. Tractor tires transmit engine power to the surface and as such they are crucial to tractor operation. In the first part of the field measurement, all tires were inflated to 180kPa, while in the second part of the field measurements the tire pressure was set to 75kPa in front tires and to 65 kPa in rear tires. The results of the field measurement of the John Deere 6920S tractor with different tire inflation shows that pull performance increased by 9.9% and wheel slip decreased by 9.7%.

scholarly journals MASTERING MODERN TECHNICAL TERMS THROUGH BILINGUALISM (In the field of architecture, design and urban planning)

2021 ◽  
pp. 38-42
Author(s):  
N. S. Abdyraeva
Keyword(s):  
Urban Planning ◽  
Architecture Design ◽  
The Creation ◽  
Technical Terms

The article discusses the issues of in-depth mastering of professional and special terms through bilingualism and the creation of a dictionary of professional terms in several languages, at the same time to improve the competence and competitiveness in the training of specialists in the field of architecture, design and urban planning.

scholarly journals Species correlation measurements in turbulent flare plumes: considerations for field measurements

2021 ◽  
Vol 14 (7) ◽  
pp. 5179-5197
Author(s):  
Scott P. Seymour ◽  
Matthew R. Johnson
Keyword(s):  
Measurement Uncertainty ◽  
Black Carbon ◽  
Field Measurement ◽  
Field Measurements ◽  
Tunable Diode Laser ◽  
Bootstrap Analysis ◽  
Positive Skewness ◽  
Spatial Coverage ◽  
Sampling Protocols ◽  
Added Uncertainty

Abstract. Field measurement of flare emissions in turbulent flare plumes is an important and complex challenge. Incomplete combustion from these processes results in emissions of black carbon, unburnt fuels (methane), CO2, and other pollutants. Many field measurement approaches necessarily assume that combustion species are spatially and/or temporally correlated in the plume, such that simple species ratios can be used to close a carbon balance to calculate species emission factors and flare conversion efficiency. This study examines the veracity of this assumption and the associated implications for measurement uncertainty. A novel tunable diode laser absorption spectroscopy (TDLAS) system is used to measure the correlation between H2O and black carbon (BC) volume fractions in the plumes of a vertical, turbulent, non-premixed, buoyancy-driven lab-scale gas flare. Experiments reveal that instantaneous, path-averaged concentrations of BC and H2O can vary independently and are not necessarily well correlated over short time intervals. The scatter in the BC/H2O ratio along a path through the plume was well beyond that which could be attributed to measurement uncertainty and was asymmetrically distributed about the mean. Consistent with previous field observations, this positive skewness toward higher BC/H2O ratios implies short, localized, and infrequent bursts of high BC production that are not well correlated with H2O. This demonstrates that the common assumption of fixed species ratios is not universally valid, and measurements based on limited samples, short sampling times, and/or limited spatial coverage of the plume could be subject to potentially large added uncertainty. For BC emission measurements, the positive skewness of the BC/H2O ratio also suggests that results from small numbers of samples are more likely to be biased low. However, a bootstrap analysis of the results shows how these issues can be avoided with sufficient sample size and provides initial guidance for creating sampling protocols for future field measurements using analogous path-averaged techniques.

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