First experimental results and new theoretical calculations on photoionization processes in multiply-charged Xe[sup 3+] to Xe[sup 7+] ions

2000 ◽  
Author(s):  
J.-M. Bizau ◽  
C. Blancard ◽  
R. Marmoret ◽  
D. Hitz ◽  
J.-M. Esteva ◽  
...  
Keyword(s):  
Theoretical Calculations ◽  
Experimental Results ◽  
Multiply Charged

Research of stamping of unequal channel bars. Part 5. Methods for calculating the extrusion of channels. 2. Extrusion of non-strengthening material

2021 ◽  
pp. 46-52
Author(s):  
A.L. Vorontsov
Keyword(s):  
Plane Strain ◽  
Theoretical Calculations ◽  
Experimental Studies ◽  
High Accuracy ◽  
Experimental Results ◽  
Die Forging

The results of experimental studies on the extrusion of channels from non-strengthening material are presented. Comparison of theoretical calculations with experimental results showed the high accuracy of the derived formulas. Keywords: die forging, extrusion, punch, matrix, misalignment, plane strain. [email protected]

Young’s Experiment on Slits with an Angle Between Them

2014 ◽  
Vol 9 (2) ◽  
pp. 173-179
Author(s):  
Anton Bogomyagkov ◽  
Viktor Dorokhov ◽  
Oleg Meshkov ◽  
Aleksandr Polygalov ◽  
Alexey Shcheglov
Keyword(s):  
Experimental Data ◽  
Interference Pattern ◽  
Intensity Distribution ◽  
Mathematical Analysis ◽  
Theoretical Calculations ◽  
Experimental Results ◽  
Digital Data ◽  
Hyperbolic Function ◽  
Standard Laboratory ◽  
Arbitrary Angle

Here are proposed a modified version of Young’s experiment on slits with an arbitrary angle between them. Also here performed mathematical analysis of the proposed scheme, showing that the intensity distribution can be approximated by a hyperbolic function. Experimental data confirm theoretical calculations. Analysis of the experimental results has conducted using two different methods of processing the digital data of the interference pattern. Theoretical calculations and experimental results established a nontrivial fact, that the interference patterns for slits with different, but symmetrical respect to 90° angles have the same intensity distribution. This experiment may be used as a standard laboratory work in University on optics workshop

scholarly journals Wavelength dependent nonlinear optical response of tetraphenylethene aggregation-induced emission luminogens

2018 ◽  
Vol 2 (12) ◽  
pp. 2263-2271 ◽  
Author(s):  
Jianbo Xiong ◽  
Xinyue Li ◽  
Chunqing Yuan ◽  
Sergey Semin ◽  
Zhaoquan Yao ◽  
...  
Keyword(s):  
Optical Properties ◽  
Nonlinear Optical ◽  
Theoretical Calculations ◽  
Experimental Results ◽  
Nlo Properties ◽  
Aggregation Induced Emission ◽  
Non Linear ◽  
Potential Applications ◽  
Linear Optical Properties ◽  
Linear Optical

Studies of the non-linear optical properties of classical AIEgens are rare, despite their important potential applications in organic composite photonic circuits. Here, we present experimental results, supported by theoretical calculations, of the non-linear optical (NLO) properties of TPE and its halogenated derivates.

Ring opening copolymerization of ε-caprolactone and diselenic macrolide carbonate for well-defined poly(ester-co-carbonate): kinetic evaluation and ROS/GSH responsiveness

2020 ◽  
Vol 11 (9) ◽  
pp. 1597-1605 ◽  
Author(s):  
Jiahao Wang ◽  
Chuanhao Sun ◽  
Jieni Hu ◽  
Yanling Huang ◽  
Yunxiang Lu ◽  
...  
Keyword(s):  
Ring Opening ◽  
Theoretical Calculations ◽  
Experimental Results ◽  
Kinetic Evaluation ◽  
Composition And Structure ◽  
Competitive Mechanism

Theoretical calculations agreed well with the experimental results. The competitive mechanism was proposed to clarify the composition and structure of the copolymers.

scholarly journals Subsurface imaging of flexible circuits via contact resonance atomic force microscopy

2019 ◽  
Vol 10 ◽  
pp. 1636-1647 ◽  
Author(s):  
Wenting Wang ◽  
Chengfu Ma ◽  
Yuhang Chen ◽  
Lei Zheng ◽  
Huarong Liu ◽  
...  
Keyword(s):  
Atomic Force Microscopy ◽  
Theoretical Calculations ◽  
Contact Stiffness ◽  
Metal Layer ◽  
Experimental Results ◽  
Subsurface Imaging ◽  
Force Microscopy ◽  
Atomic Force ◽  
Cover Thickness ◽  
Contact Resonance

Subsurface imaging of Au circuit structures embedded in poly(methyl methacrylate) (PMMA) thin films with a cover thickness ranging from 52 to 653 nm was carried out by using contact resonance atomic force microscopy (CR-AFM). The mechanical difference of the embedded metal layer leads to an obvious CR-AFM frequency shift and therefore its unambiguous differentiation from the polymer matrix. The contact stiffness contrast, determined from the tracked frequency images, was employed for quantitative evaluation. The influence of various parameter settings and sample properties was systematically investigated by combining experimental results with theoretical analysis from finite element simulations. The results show that imaging with a softer cantilever and a lower eigenmode will improve the subsurface contrast. The experimental results and theoretical calculations provide a guide to optimizing parameter settings for the nondestructive diagnosis of flexible circuits. Defect detection of the embedded circuit pattern was also carried out, which indicates the capability of imaging tiny subsurface structures smaller than 100 nm by using CR-AFM.

scholarly journals Experimental Study on the Local Drag of Completion String with Packers in Horizontal Wells

Coatings ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 657 ◽  
Author(s):  
Qimin Liang ◽  
Bairu Xia ◽  
Baolin Liu ◽  
Zhen Nie ◽  
Baokui Gao
Keyword(s):  
Experimental Study ◽  
Oil And Gas ◽  
Theoretical Calculations ◽  
Horizontal Wells ◽  
Experimental Results ◽  
Economic Losses ◽  
Horizontal Section ◽  
Friction Coefficients ◽  
Oil And Gas Fields ◽  
Gas Fields

The multistage stimulation technology of horizontal wells has brought huge benefits to the development of oil and gas fields. However, the completion string with packers often encounters stuck due to the large drag in the horizontal section, causing huge economic losses. The local drag of the completion string with packers in the horizontal section is very complicated, and it has not been fully understood by theoretical calculations. A local drag experiment is designed to simulate the influence of microsteps and cuttings on the local drag of the completion string with packers in the inclined and horizontal sections. An obvious increase of the local drag of the packer is found at microsteps of the horizontal section, and the local drag is greatly affected by the amount of sand. In addition, the string with packers will vibrate during the tripping process in the deviated section, and the local drag is different when different amounts of sand are in the hole, but the change law is similar. The experimental results show that the friction coefficients of the packers with different materials in the horizontal section vary greatly, resulting in different local drags. It indicates that the local drag of the completion string not only depends on the microsteps and sand quantity in the wellbore, but also on the material difference of the packers. Only if microsteps and cuttings are removed can the completion string be tripped into horizontal wells smoothly.

Theoretical Computation and Experimental Analysis of Natural Frequencies of Hot Rolling-Mill Housing

2013 ◽  
Vol 278-280 ◽  
pp. 169-173
Author(s):  
Wei Jin Ma ◽  
Yun Bo Wei ◽  
Feng Lan Li ◽  
Jun Yuan Wang ◽  
Xiao Yan Xiong
Keyword(s):  
Mode Shape ◽  
Hot Rolling ◽  
Rolling Mill ◽  
Natural Frequencies ◽  
Vibration Mode ◽  
Theoretical Calculations ◽  
Mode Frequency ◽  
Experimental Results ◽  
Main Mode ◽  
Hot Rolling Mill

Three-dimensional digital model of hot rolling-mill housing was built. The natural frequency and vibration mode shape of the first 10 order modes of hot rolling mill housing were calculated using ANSYS software. The vibration mode shape was studied in detail. The striking vibration signal and subsequently the natural frequencies were measured by placing two 3-Dimensional accelerators in the key points of the rolling mill horsing. Theoretical calculations and experimental results verified each other，high agreement was shown between the experimental results and the theoretical results. The first 10 mode frequency all appeared in the experiment signal with low error. The main mode frequency (117.3Hz) of the experimental signal has the lowest error down to 0.07%.

Silicon Subiodide Clusters

2007 ◽  
Vol 7 (11) ◽  
pp. 3788-3791 ◽  
Author(s):  
Andriy Dmytruk ◽  
Yeon-Su Park ◽  
Atsuo Kasuya ◽  
Hideki Kikuchi ◽  
Masae Takahashi ◽  
...  
Keyword(s):  
Laser Ablation ◽  
Ab Initio ◽  
Mass Spectroscopy ◽  
Theoretical Calculations ◽  
Time Of Flight ◽  
Experimental Results ◽  
Silicon Cluster ◽  
Chain Ring ◽  
Bulk Powder

Silicon subiodide clusters (SinIm, n = 1–20) produced by laser ablation of bulk powder silicone tetraiodide have been investigated by time-of-flight mass spectroscopy and ab initio calculations. Both experimental results and theoretical calculations revealed a tendency to form different structures of the clusters depending on n: chain, ring, and cage structures for n ≤ 6, 6 < n < 16, and n ≥ 16, respectively. The results showed that iodine, like hydrogen, can be used for stable silicon cluster termination.

Effect of Rotation Relationship Between γ Grains on Compatibility of Deformation of Ti-A1 Alloys

1994 ◽  
Vol 364 ◽  
Author(s):  
M. A. Morris ◽  
J Luster
Keyword(s):  
Orientation Relationship ◽  
Theoretical Calculations ◽  
Specific Rotation ◽  
Experimental Results ◽  
Slip Systems ◽  
Active Deformation ◽  
Slip Transfer ◽  
Compatibility Factor ◽  
Geometric Compatibility ◽  
Active Slip

AbstractThe specific rotation relationships between adjacent γ grains have been measured in an alloy of composition Ti-47.5Al-2.5Cr consisting of lamellar and equiaxed distributions of γ grains in which the α2 phase was distributed as long lamellae or smaller globules respectively. Detailed analyses of active slip systems have been carried out by TEM observations of deformed samples and from these, the effect that specific rotations between γ grains have on the compatibility of deformation across adjacent grains has been discussed. Theoretical calculations of the geometric compatibility factor characterising the best slip transfer across adjacent grains have been used and compared to the experimental results. It has been possible to deduce the role played by the type of orientation relationship between grains in producing active deformation systems that allow the maximum compatibility of deformation.

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