Within the framework of the effective-field theory with correlations, the phase transition behaviors of the spontaneous polarization in a ferroelectric thin film with symmetrical structure have been studied in detail by the transverse field Ising model. A general expression for the phase diagram of the...

This paper introduces the technology of activating CuCr50 alloy powder by MA(Mechanical Alloying) and sintering CuCr50 powder by SPS(Spark Plasma Sintering). It analyzes the effect on electrical conductivity and hardness of CuCr50 alloy when Cu powder in different morphology. The results indicate that...

Complicated minerals, high total organic carbon (TOC) content, and thin interbeded layers aggravated the complexity of logging responses and made it very difficult to find the target zone of the tight oil reservoir in the Jimusaer depression in northwestern China. Horizontal well drilling is extremely...

Gathering and transferring pipeline network of oil-gas system exerts remarkable impact on construction cost for whole oilfield engineering. Based on analysis of previous optimization methods for oil-gas pipeline network layout, this paper introduces some frequently used optimization design methods and...

Based on the Bohai oilfield, which geological condition is unconsolidated heavy oil reservoir, which is targeted to design a new 7 "high shot density big debris shaped charge. used several kinds of technology in this research ,such as numerical simulation analysis on the formation of shaped charge case...

In order to guarantee the safety and reliability on the operation of oil and gas well, tested the thermal stability, mechanical sensitivity, flame sensitivity, electrostatic spark sensitivity and the 5s delay explosion temperature of LLM-105 explosive. And conducted the tests with 4 1/2 perforating charge...

In the using of materials, kinds of injury which is sometimes difficult to repair or too costly to repair may appear in the surface and interior, which will shorten the life of the materials. Self-healing technology can be used to improve material reliability and extend the service life, so composite...

We report the photoelectronic properties of MoS2/CdS heterojunction films fabricated via rapid chemical vapor deposition (CVD) and chemical bath deposition (CBD). Silver-doped MoS2 thin films were deposited on prepared indium tin oxide substrates via CVD, and then CdS films were prepared on the surfaces...

In the process of oil and nature gas drilling, the drilling fluid density is a very important parameter, which is one of the key factors of drilling safety. In the drilling process it is important to adjust the drilling fluid density rapidly according to the formation pressure. However, the efficiency...

Experimental investigations on lap welding of magnesium alloy to steel using resistance spot welding with Cu-Zn alloy interlayer are carried out. The effect of welding time, welding current and interlayer thickness on the bonding mode of interface and joint strength has been investigated using mechanical...

To overcome the the drawbacks of poor wear resisitance of titanium and its alloys, so far many efforts have been made to improve wear resistance and some techniques have been developed. Theses techniques can be classified into two categories: surface coating and surface cladding. Surface coatings generally...

In a dual-drum shearer, the drum's height is mainly adjusted by a height-adjustment hydraulic system. However, the hydraulic system is prone to failures, since oil is likely to leak induced by the abrasions of key parts. In the present work, based on the analysis of system failures and the requirements...

Silica gel has a potential ability to adsorb water vapor and contaminant together, so it has been focused recently in indoor air environment. In this paper, the performance of silica gel adsorbing trace gas pollutions in isothermal column is studied through theoretical methods. The model of the adsorption...

In order to make the intelligent materials have a new development in the field of Mechanical Engineering, composition of intelligence materials is briefly introduced in this article; Design thought of intelligent materials are detailed analyzed; Main functions of the intelligent materials was described;...

Surface modification of nanoparticles is a new technology, it refers to the use of physical, chemical and other methods to deal with surface of the nanoparticles. Research objective of this paper is surface modification methods and applications. All analysis is based on the need of use, change the structure...

Reinforced concrete frames are one of most popular structures used in the world, but the research on their fire is at primary stage. In this thesis, the non-liner analysis of reinforced concrete frames at elevated temperature was analyzed by ANSYS, which included calculations and analysis of temperature...

By using the usual mean-field approximation, the phase transition properties of a ferroelectric nanoparticle described by the transverse field Ising model have been studied. The exchange interactions and transverse fields at the surface are assumed to be different from those of the interactions parameters...

This paper’s objective is to solve the problem of China’s Oversea Mineral Resources Exploration and Development. Based on the similarities and fundamental differences between Japan and China, we analyzed the experience of Japan’s useful ideas, and we also compared and analyzed the strategic configuration...

The transverse offset center of gravity of goods is one of basic railway technical standards. The current in our country states: The transverse offset center of gravity of goods should be less than 100mm.This rule quoting The Soviet Union's 1950s rules is lack of basis. It just meets the derailment coefficient...

The measuring technique for characteristics of localized surface plasmon resonance (LSPR) effect of metallic nanostructures is studied in this paper. A simple apparatus for measuring the LSPR properties is designed and developed with the help of an integrating sphere using a single light beam; the sphere...

The guided wave with the bidirectional propagation leads to complex signal which would be difficult to identify the end echo and the flaw echo. To simplify the guided wave signals based on the magnetostrictive effect, one-direction receiving method is investigated. The receiving guided wave method in...

With the deepening of the unconventional reservoir exploration, formation lithology evaluation is becoming more and more difficult, because in addition to the common minerals such as quartz, calcite, illite, some special minerals like pyrite, gypsum, dolomite, ankerite can also been seen. However, conventional...

Tridimensional injection-production well pattern has significant advantages on development of very thick buried hill reservoirs. But optimization is needed because the space configuration relation of buried hill reservoirs is very complicated. Reservoir numerical simulation techniques are applied in...

Separator membrane in microbial fuel cell (MFC) is one of the main structures and could significantly affect the performance and the cost of MFCs. Proton exchange membranes (PEMs) are typically used in two-chamber microbial fuel cells (MFCs) to separate the anode and cathode chambers while to allow protons...

This is a review on the structure and performance characteristics of carbon fiber and carbon fiber composite material (CFCM) and their application research progress. Carbon content varies with the type of carbon fiber, and the carbon content is usual more than 90%. Carbon fiber possesses excellent mechanical...

Firstly, from the point of view of the frequency domain Helmholtz equation, a detailed description of the frequency domain modeling process and frequency domain blended seismic acquisition forward process were given. By solving the Helmholtz equation, reverse-time migration method in frequency domain...

Objetive The aim of the present study was to investigate the pharmacokinetics of coumarins from cortex daphnes (CCD) in a microemulsion (ME) gel transdermal delivery system with a newly developed HPLC method. Methods The pharmacokinetics of the microemulsion containing CCD was studied in rabbits with...