Heterogeneous Formation of HONO Catalyzed by CO2

2021 ◽  
Author(s):  
Deming Xia ◽  
Xinran Zhang ◽  
Jingwen Chen ◽  
Shengrui Tong ◽  
Hong-bin Xie ◽  
...  
Keyword(s):  
Heterogeneous Formation

Evidence for heterogeneous formation of nitrous acid on cloud droplets

2000 ◽  
Vol 31 ◽  
pp. 352-353 ◽  
Author(s):  
K. Acker ◽  
W. Wieprecht ◽  
R. Auel ◽  
D. Kalass ◽  
D. Möller
Keyword(s):  
Nitrous Acid ◽  
Cloud Droplets ◽  
Heterogeneous Formation

scholarly journals PM1.0-Nitrite Heterogeneous Formation Demonstrated via a Modified Versatile Aerosol Concentration Enrichment System Coupled with Ion Chromatography

2021 ◽  
Author(s):  
Xiaona Shang ◽  
Huihui Kang ◽  
Yunqian Chen ◽  
Munira Abdumutallip ◽  
Ling Li ◽  
...  
Keyword(s):  
Ion Chromatography ◽  
Aerosol Concentration ◽  
Heterogeneous Formation

Achieving over 15% Efficiency in Solution-Processed Cu(In,Ga)(S,Se)2 Thin-Film Solar Cells via a Heterogeneous-Formation-Induced Benign p–n Junction Interface

2021 ◽  
Vol 13 (11) ◽  
pp. 13289-13300
Author(s):  
Da-Seul Kim ◽  
Gi Soon Park ◽  
Byungwoo Kim ◽  
Soohyun Bae ◽  
Sang Yeun Park ◽  
...  
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
Thin Film Solar Cells ◽  
Solution Processed ◽  
Heterogeneous Formation

The Austin Chalk: Simulation of Horizontal Wells in a Heterogeneous Formation

1990 ◽  
Author(s):  
G.C. Schnerk ◽  
C.N. Madeen
Keyword(s):  
Horizontal Wells ◽  
Austin Chalk ◽  
Heterogeneous Formation

scholarly journals Characterization of Degenerate Configurations in Attitude Determination of Three-Vehicle Heterogeneous Formations

Sensors ◽  
2021 ◽  
Vol 21 (14) ◽  
pp. 4631
Author(s):  
Pedro Cruz ◽  
Pedro Batista
Keyword(s):  
Unique Solution ◽  
Multiple Solutions ◽  
Attitude Determination ◽  
Line Of Sight ◽  
Number Of Solutions ◽  
Relative Line ◽  
Heterogeneous Formations ◽  
Heterogeneous Formation

The existence of multiple solutions to an attitude determination problem impacts the design of estimation schemes, potentially increasing the errors by a significant value. It is therefore essential to identify such cases in any attitude problem. In this paper, the cases where multiple attitudes satisfy all constraints of a three-vehicle heterogeneous formation are identified. In the formation considered herein, the vehicles measure inertial references and relative line-of-sight vectors. Nonetheless, the line of sight between two elements of the formation is restricted, and these elements are denoted as deputies. The attitude determination problem is characterized relative to the number of solutions associated with each configuration of the formation. There are degenerate and ambiguous configurations that result in infinite or exactly two solutions, respectively. Otherwise, the problem has a unique solution. The degenerate configurations require some collinearity between independent measurements, whereas the ambiguous configurations result from symmetries in the formation measurements. The conditions which define all such configurations are determined in this work. Furthermore, the ambiguous subset of configurations is geometrically interpreted resorting to the planes defined by specific measurements. This subset is also shown to be a zero-measure subset of all possible configurations. Finally, a maneuver is simulated to illustrate and validate the conclusions. As a result of this analysis, it is concluded that, in general, the problem has one attitude solution. Nonetheless, there are configurations with two or infinite solutions, which are identified in this work.

Prediction by the method of moments of transport in a heterogeneous formation

1988 ◽  
Vol 102 (1-4) ◽  
pp. 453-473 ◽  
Author(s):  
Peter K. Kitanidis
Keyword(s):  
Method Of Moments ◽  
Heterogeneous Formation

Dispersive-convective characteristics in the biorestoration of contaminated soil with a heterogeneous formation

1994 ◽  
Vol 38 (1) ◽  
pp. 163-185 ◽  
Author(s):  
Xiaoqing Yang ◽  
L.E. Erickson ◽  
L.T. Fan
Keyword(s):  
Contaminated Soil ◽  
Heterogeneous Formation

Saltwater transport in a heterogeneous formation: A case study

1988 ◽  
Vol 3 (3) ◽  
Author(s):  
A. Das Gupta ◽  
S. Sabanathan
Keyword(s):  
Heterogeneous Formation

scholarly journals Investigation of solute transport in nonstationary unsaturated flow fields

2012 ◽  
Vol 9 (7) ◽  
pp. 8885-8903
Author(s):  
C.-M. Chang ◽  
H.-D. Yeh
Keyword(s):  
Large Time ◽  
Unsaturated Flow ◽  
Theoretical Work ◽  
Velocity Fields ◽  
Solute Flux ◽  
Field Scale ◽  
Partially Saturated ◽  
Correlation Scale ◽  
Flow Domain ◽  
Heterogeneous Formation

Abstract. Most theoretical work on analyzing the plume's spreading at the field scale in a partially saturated heterogeneous formation assumes weak stationarity of velocity field. While this assumption is not applicable to the case of a bounded flow domain, the nonstationarity in fluctuations of unsaturated velocity fields is induced through the presence of the boundary conditions in the flow domain. In this work, we attempt to quantify the large-time macrodispersion in nonstaionary unsaturated velocity fields caused by the presence of a fixed head boundary condition. Application of the perturbation-based nonstationary spectral approach leads to an analytical expression for the macrodispersion describing the field-scale dispersive solute flux in terms of the statistical moments of two formation parameters, i.e. the Gardener's parameter (α) and the saturated hydraulic conductivity (Ks). The results predicted from the expression indicate that the enhanced unsaturated plume's spreading can arise from a larger correlation scale of ln Ks or ln α fields. In addition, the α-parameter takes the role in reducing the field-scale plume spreading.

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