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The existing process of 2A12 aluminium alloy piston is cutting completed by hot- drawing pole , as a material utilization rate less than 40%. In order to improve material utilization, cold-extrusion process is the reasonable choice, but only if solve the annealing before cold-extrusion, surface lubricated, the Parameter optimization of cold-extrusion and quenching process after extrusion. This research uses the DEFORM finite element analysis and a good effect in practical application is obtained to enhance the rate of more than 80% material utilization, scrap rate is less than 0.5%.

The PCE has a great relationship with the work function of conductors in organic and printed electronics devices. And organic photovoltaics require an electrode with a work function (WF) that is low enough to either facilitate the transport of electrons in and out of various optoelectronic devices or collect electrons from the lowest unoccupied molecular orbital (LUMO) of a given organic semiconductor. In inverted organic photovoltaics, the ITO is normally used as cathode to collect electrons .By using PDDA deposition, the surface work function of ITO can be decreased by 0.3 eV, which is able to improve the electrons transport and the PCE in OPV, as it has been proved that the surface electronic potential of ITO is very sensitive to the presence of self-assembled molecular layers.

A laboratory model test of tunnel anchor was conducted to investigate its pullout mechanism and bearing capacity. Surface and rock deformation, strain and stress were measured during the entire model test process. The results show that: under pull out load, tensile failure first occurs in top surface rock near the anchor, then shear failure occurs in anchor-rock interface and rock around the anchor. The failure surface is inverted cone from the anchor bottom. Under 50 times design cable force tunnel rock is in elastic stage, suggesting that current tunnel anchor design is quite conservative and can be further optimized.

According to such problems as the electricity metering seal’s pry-prevention and falsification-prevention performance is relatively weak, whose management technology is also relatively out of date, this paper has designed a much more security electricity metering seal application system based on the cryptographic technology and RFID technology. This system not only can realize the real-time monitor and manage to the electricity metering device and seal but also can ensure electricity metering seal’s falsification-prevention performance, key data’s integrity and confidentiality by leading-in advanced data cryptographic technology and adding security encryption device. It has great practical value.

Aimed at the characteristic that highcontent of hematite of valuable minerals in overflow of concentrate Before the strong magnetism from Sijiaying Concentrator, by that flocculation test of pure minerals of hematite, quartz, chlorite and investigate that flocculation effect of lime, PAC, PAFC of inorganic flocculants and PAM of organic flocculants to three kinds of pure minerals in this article. The test results show that the bigger sedimentation velocity difference hematite between quartz, chlorite when do not add any flocculants. When adding inorganic flocculants include lime, PAC, PAFC, flocculation effect is better to hematite and quartz, but flocculation effect is bad chlorite; Flocculation effect is better to three pure minerals when adding PAM of organic flocculants.

The evolutionary structural optimization (ESO) is used to optimize constrained damping layer structure. Considering the vibration and energy dissipation mode of the plate with constrained layer damping treatment, the elements of constrained damping layers and modal loss factor are considered as design variable and objective function, while damping material consumption is considered as a constraint. The sensitivity of modal loss factor to design variable is further derived using modal strain energy analysis method. Numerical example is used to demonstrate the effectiveness of the proposed topology optimization approach. The results show that vibration energy dissipation of the plates can be enhanced by the optimal constrained layer damping layout.

Shear-thickening polishing (STP) technology was used on ultraprecision machining of Si3N4 ceramics. The STP slurry with diamond abrasives was prepared for STP process and its rheological property was studied. The polishing performance of Si3N4 ceramics with STP was analyzed. Results show that STP slurry with diamond abrasives exhibits non-Newtonian power-law fluid characteristics with shear-thickening effect. As using STP slurry with abrasive particle size of 0.2 μm, the material removal rate changed from 4.22 to 4.05 μm/h after 60 mins ́ polishing; and decreased from 3.88 to 3.75 μm/h after 120 mins ́ polishing. The average surface roughness reduced from Ra 107.2 to Ra 6.5 nm after 120 mins ́ polishing.

Shear thickening polishing (STP) method was newly developed to achieve high efficient and high quality finishing of complex curved surface. The shear thickening fluid based slurry is one of the key factors in STP process. Viscosity of different shear thickening polishing slurry (STPS) was tested by rheometer in this study. The influences of dispersed particle size and concentration, abrasive material, abrasive particle size and concentration on the rheological property of STPS were analyzed. The results show that smaller dispersed particle (5.5 or 13μm in this study) and relative higher concentration (50-55 wt.%) are better for shear thickening effect of the base fluid. The viscosity of base fluid increases from 0.15-0.3 Pa·s to 0.8-1.1 Pa·s under high shear rate. The participation of Al2O3 and diamond abrasive changes the rheological property little, and the viscosity of STPS reaches the highest value 1.8 Pa·s at shear rate 300 s-1. But SiC abrasive obviously destroys the shear thickening effect. SPTS with different Al2O3 abrasive concentration in this study presents almost same viscosity curve. It is inferred that the number of the abrasive particle but not the weight ratio plays the role to effect the rheological property of STPS.

From the perspective of improving single well production and wellbore stability, stress field and natural fractures are the factors which have to be taken into account in the development of horizontal wells of the complex carbonate oil and gas fields in Kuqa piedmont and platform-basin transitional area. On the one hand, as the present stress field is the key factor to control fracture permeability, the trajectory of horizontal wells should pass through fracture system with good permeability as much as possible, being conducive to the effective stimulation of the reservoir. On the other hand, at the state of specific stress, the stability of well trajectory varies with directions. Therefore, before drilling horizontal wells, it is necessary to fully analyze the quantitative relationship between the present stress state and natural fracture occurrence and mechanical characteristics, etc., to optimize and determine a well trajectory conducive to high yield and wellbore stability. In this study, firstly, the fundamental principles for evaluating the present stress state and analyzing the relationship between the stress and fractures were described. Then based on the relationship between them, the occurrence and longitudinal positions of permeability fractures were analyzed. Apart from that, the stability index and fracture opening pressure distribution of wells in different directions at given stress state and fracture system were also analyzed. Finally, the optimization scheme for trajectory of horizontal wells under complex conditions was discussed with three aspects taken into account, i.e. best drilling in permeability fractures, wellbore stability and drilled reservoir stimulation.

A high performance liquid chromatography-tandem mass spectrometric method had been established for simultaneous determination of 25 sex hormones. The hormones were extracted by ethyl acetate and ethyl acetate-tert-butyl methyl ether (1/1, v/v) after enzymatic hydrolysis, followed by an LC-C18 cartridge for cleanup, then were quantified by HPLC-ESI MS/MS with internal standards. Limits of quantification were 1-2 μg.kg-1, average recoveries were 92-113 %, and the R.S.D. was 6-10 %.

Overall risk management information system is the information system management platform for enterprise to carry out overall risk management work. It provides a strong support for enterprise to timely find out, control, avoid and address risks. This paper designed the overall risk management system of the Steel Group in accordance with the requirements of the specifications of overall risk management and by combining with software engineering and the business characteristics of Steel Group. This paper could provide reference and guidance for enterprise to develop and construct overall risk management information system.

As most of sedimentary rocks are anisotropic, it is significant to research the impact of the anisotropy of strength on wellbore stability in drilling engineering. Particularly, in the Kuqa piedmont exploration area, the anisotropy of strength caused by various jointed surfaces, fracture surfaces and fault planes in formation cause the formation of several groups of weak low-intensity planes traversing borehole . These weak planes will become failure earlier than the rock body in the context of strong stress and high pore pressure, causing chipping, breakouts and sticking. If fractures have good permeability and drilling fluid column pressure is greater than pore pressure, loss may occur. The loss pressure would not be controlled by fracturing pressure and horizontal minimum principal stress, but it depends on the relationship between fracture occurrence and triaxial stress state. In the event of loss, the drilling fluid will flow into these weak structural planes, causing the decrease of friction between rocks and increase of wellbore instability. As a result, for strongly anisotropic formation, the collapse pressure and leakage pressure of weak planes are key factors for evaluating well drilling stability. In this study, according to the stability evaluation on the transversely isotropic rock mechanics in Keshen zone of Kuqa piedmont, the impacts of fracture development on wellbore instability is analyzed; relevant suggestions on engineering geology for the special pressure window in strong anisotropic formation are also put forward.

Single-chip microcomputer and PC for data transmission,Using a serial port communication protocol,This paper will through the custom serial port communicatio protocol,Through the analysis of the serial port communication protocol packet format,Resolve the Host computer or slavecomputer(AVR MCU) serial port to send and receive over the packet,Shown in serial debugging assistant,And gives the specific implementation method.

Microstructure of ore particle has significant influence on the efficiency of bio-heap leaching, because it affects such processes as microscale fluid flow, mass diffusivity, bacteria growth, chemical reaction, etc. The micropores and microcracks in ore particles evolve continuously during bioleaching. To obtain crucial quantitative information on structural evolutions, non-destructive techniques become necessary. In this study, a cylindrical ore sample of 3mm diameter was scanned with X-ray micro-CT before and after bioleaching test. The ore sample is a kind of mixed ore that composed of oxide copper and sulfide copper. The CT scanner used is μCT225kvFCB. By using an in-house developed image analysis program based on MATLAB, 3D information about the total porosity, the pore size distribution, the pore connectivity, and the pore fractal dimension of the ore sample before and after bioleaching were calculated and analyzed. The results obtained in this study are promising for a better understanding of microstructure evolution mechanisms on ore particles during bioleaching. Results also show that 3-D image analysis is a powerful technique to characterize the morphological, structural and topological differences due to bioleaching.

A new mixed laser crystal, Yb0.006Y0.923Lu0.071VO4, has been successfully grown using the Czochralski method. X-ray powder diffraction analysis shows that the crystal has ZrSiO4 structure. Density, thermal expansion coefficients, specific heat and thermal diffusion coefficients were measured, and the thermal conductivity coefficients were determined.

The aim of the study was to investigate bamboo shoots protein extraction. A Box-Behnken design (BBD) was applied through the Response Surface Methodology (RSM) to determine the effects of pH, temperature and solid-liquid ratio during Phyllostachys pubescens bamboo shoots protein extraction. Regression analysis was applied on the data obtained. The more relevant variables were pH, liquid-solid ratio. The coefficient determination (R2 = 0.9258) was good for the second-order model. Maximum yield was 10.77±2.28% obtained when pH, liquid-solid ratio, temperature and extraction time were 12, 32.24, 46.12°C and 20 min, respectively. The result was help to design the process of optimal protein extraction from Phyllostachys pubescens bamboo shoots.

The mechanical strength of polymeric membranes is one of the limitations for their applications. Carbon materials are effective in reinforcing polymeric materials, but it is unknown whether they would degrade the membranes’ gas separation performance. In this paper, using brominated poly (2,6-dimethyl-1,4-phenylene oxide) (BPPO) as matrix, nanocomposite membranes of BPPO/graphene, BPPO/carbon back and BPPO/fullerene were prepared. The CO2 permeability and CO2/N2 selectivity of the nanocomposite membranes were studied. Different from the BPPO/carbon black and BPPO/fullerene membranes, the BPPO/graphene membrane was found having improved gas separation performance after incorporation 2 wt. % graphene.

The neutral silicone glass sealant was prepared and the mechanical performance of this silicone glass sealant was researched in this paper. The recipe of neutral silicone glass sealant was studied. Besides, the influence of different cross-linking agents was researched; meanwhile, the effect of plasticizer and reinforcing agent on the mechanical properties of the material was studied. To obtain the best properties of neutral silicone glass sealant, the recipe should be taken further efforts to optimize.

To study the process conditions for preparing aspirin β-cyclodextrin inclusion.Method: Choose the usage ration of aspirin with β-cyclodextrin and the time of reaction as the main factors, and use the inclusion yield as evaluated indicators and the process condition to conduct orthogonal experiment Optimization Pack aspirin.Outcome: The optimum inclusion process condition: molar ratio of the aspirin with β-cyclodextrin is 1:3, inclusion time is 60 minutes.Conclusion: The process condition of using β-cyclodextrin inclusion to inconcluse aspirin is feasible, effective, and of applicative value.

A isoporous brominated poly (phenylene oxide) (BPPO) microfiltration membrane system, fabricated by figure breath method, was demonstrated for the effective removal of impurity from contaminated water. The water permeation flux of BPPO membrane is higher. Such ordered isoporous membranes can also be applied in other size-based separation systems, enabling new opportunities in bioseparation and biosensors.

Reduced-iron used rotary spray cooler atomizes cooling water and sprays them directly to the outer wall of the cooler, which is called indirect cooling method for which the motion law of the materials in the cooler will have a great influence on the design and the cooling efficiency of the equipment. Based on the DEM simulation, the motion of materials in the cross section is investigated in two dimensions, and the influences of rotation speed, lifters, particles diameter and drum fill are discussed. The research results will guide the operation in real practice and help to optimize the design and control of the equipment to some extent.

Microalgae have rich oil production under full photosynthesis, which reaches over 50 mass%. In addition, microalgae oil contains the prolific cis-4,7,10,13,16,19-docosahexaenoic acid (DHA) that is usually refined for making health food or food additives. This study investigated Aurantiochytrium sp., which is a kind of microalgae, the oil of which is also refined for use in health food or food additives. The solid byproducts of Aurantiochytrium sp. oil are more than 20 mass%, discarded as rubbish. Fortunately, the solid byproducts have been found to contain a large amount of palmitic acid that exceeds more than 67 mass%, but it is difficult to transesterify from the solid byproducts of Aurantiochytrium sp. oil, such as the waste cooking oil or waste engine oil, which contain many impurities. Therefore, the sequences of saponification, reduction reaction, and acid-catalyzed reactions were conducted for the full process of transesterification in this study. Overall, we have successfully obtained more than 92 mass% transesterification rate from the solid byproducts of Aurantiochytrium sp. oil. The solid byproducts are waste turned into gold.

PC film has some shortcomings such as low surface energy and strong rigidity. In order to improve the impact strength and adhesive properties of PC film, UV curing coating which was used on the surface of the PC film achieved good results. However, the combination between the UV curing paint-PC composite membrane had not been explained clearly. In this paper, we analyzed the structure of UV curing varnish oligomers. Fourier Transform Infrared Spectroscopy (FTIR) 、X-ray Photoelectron Spectroscopy (XPS) and Liquid Chromatograph Mass Spectrometer (LC-MS) were used to characterize. Through the experiment, we had achieved 4, 4’ -Isopropyliden-edicyclohexanol(HBPA) and Phthalic acid . The existence of the two substances explained the reason why the lacquer had good adhesion, and the result also laid the foundation for the the characterization of the molecular structure about the film later.

In this paper, experiments have been carried out to determine the effect of carbonation on the resistance of sulfate attack of concrete materials. The accelerated carbonate testing was used to prepare the carbonated specimens, and wetting-drying cycles were used to evaluate the resistance of sulfate attack. Results show that longer carbonate time leads to greater depth of carbonation, and fly ash may accelerate the carbonation of concrete materials. The loss of flexural strength was greater than that of compressive strength under the condition of sulfate attack. Carbonation is detrimental to the resistance of sulfate attack.

SnO2 nanowires have been fabricated using thermal evaporation of the mixed powders of SnO2 and active carbon with Au catalysts. The morphology and structure of the prepared nanowires are determined on the basis of field-emission scanning electron microscopy (FESEM), energy-dispersive X-ray spectrometer (EDS), x-ray diffraction (XRD) and transmission electron microscopy (TEM). The comb-shape interdigitating electrode made by MEMS technology is used to auxiliary investigating the gas sensing performance of the synthesized SnO2 nanowires. The SnO2 nanowires have sensing response to acetylene concentration of 1000 ppm under operated temperature of 300°C. The gas sensing mechanism is attributed to the gas adsorption and desorption processes occurring on the surface of the gas sensing material.

Organic light-emitting materials in Organic Light-emitting Diodes(OLED) reserch in a very important posotion, the quality of materials directly affect the level of luminous efficiency of the device. We chose benzene 2,6-alkynyl, respectively, and tetrakis (4-bromophenyl) silane, tetrakis (3-bromophenyl) silane synthesis of new cross-linked polymer, the structure was characterized by solid NMR, by fluorescence chromatography UV crosslinking compound characterization of chromatographic performance in photophysical aspects may choose to add a new organic light-emitting material.

In this work, spherical LiFePO4/C composite had been synthesized by co-precipitation and spray drying method. The structure, morphology and electrochemical properties of the samples were characterized by X-ray diffraction (XRD), scanning electron micrograph (SEM), transmission electron microscope (TEM), constant current charge-discharge tests and electrochemical impedance spectroscopy (EIS) tests. The spherical LiFePO4/C particles consisted of a number of smaller grains. The results showed that the morphology of LiFePO4/C particles seriously affected the Li-ion diffusion coefficient and electrochemical properties of lithium ion batteries. Electrochemical tests revealed the spherical LiFePO4/C composite had excellent Li-ion diffusion coefficient which was calculated to be 1.065×10-11 cm2/s and discharge capacity of 149 (0.1 C), 139 (0.2 C), 133 (0.5 C), 129 (1 C) and 124 mAhg-1(2 C). After 50 cycles, the capacity retention rate was still 93.5%.

5-10nmPt-Ag nanoparticles were synthesized by Water thermal reduction, pluronic F127 and tetraethyl Orthosilicate (TEOS) have been used to synthesized mesoporous SiO2template. Pt-Ag nanoparticles have been absorbed onto the surface of mesoporous SiO2. Finally, PtAg/mesoporous SiO2nanocomposites have been modified on the surface of glass carbon electrode to prepared electrochemcial sensor which used to detect 2,4,6-dinitrophenol. In order to optimize experimental conditions, the synergistic reaction, buffer solution has been studied. The result show, when the potential at-0.404V, 2,4,6-dinitrophenol could be determined with a detection limit of 0.163μmol/L and linearity between 0.49-1667μmol/L . This sensor has high sensitivity, good reproducibility and stability.

In the hydrothermal system, In (OH)3nanobelts were obtained. After heat-treatment at 300 °C, In2O3single crystals nanobelts were produced, which can keep the morphologies and sizes of precursors. The room temperature PL spectra of as-prepared In2O3nanobelts are also detected. PL peaks of In2O3nanobelts mainly focused at 458 nm (blue).

In this paper, we present a new approachcalled hyperthermal hydrogen induced cross-linking (HHIC) technology,which can successfully enhance the surface wettability of Parylene C (PC) film via cross-linking hydrophilic polyacrylic acid（PAA）on its surface. Water Contact Angle Meter and Fourier Transform Infrared Spectroscopy (FTIR) were used to characterize wetting property, surface chemical structureof PC film before or after HHIC treatment,respectively. The results show that PAA with polar functional groups can be successfully grafted onto the PC film. As a result, the water contact angle of the modified PC membrane surface decreased from 84° to 23°,PC membrane surface wettability is improved effectively.

Metallization of Fiber-Reinforced Polymer (FRP) composites aggrandized their application to aircraft, automobile, and wind power industries. However, their application is impeded by insufficient coating adhesion strength. In order to enhance coating adhesion strength between metal coating and fiber-reinforced polymer composites substrate, a new electroless-electrolytic plating process is proposed. The plating process of composite includes the preparation composite specimens with interlayer, micro-roughening, decreasing, acid activation, electroless plating and electroplating. The coating adhesion strength was measured by pull-out test.

SiJiaYing's iron ore is fine grain hematite and gangue mineral is quartz,chlorite,black mica and parts of clay mineral.Grinding process is tend to argillation,which seriously impact the subsequent strong magnetic and flotation thick operation.This paper mainly conduct ball mill sphere diameter,ball ratio and the grinding effect factor test,which including medium filling ratio,grinding concentration and so on.By compared experiments optimize,grinding process and improve the grinding effect.

Polyimide membrane pervaporation was introduced to separate the costly diene mixtures of cyclopentadiene/methylcyclopentadiene (CPD/MCPD) from cracking C5 fractions. Four kinds of membrane solutions were prepared and two kinds of polyimide homogenous membranes were fabricated by thermal imidizations using the dianhydrides (BPADAand PMDA) and the diamines (ODA and DDS). The effect of the casting solutions viscosity on the membrane formation was revealed, and the formation of functional groups and the synthesis mechanisms of the thermal imidizations were indicated by FT-IR. The adsorption behaviors and the pervaporation performances were studies for BPADA-ODA and PMDA-ODA membranes. The results show that the permeation fluxes are 164g∙m-2∙h-1 and 4.2g∙m-2∙h-1 for BPADA-ODA and PMDA-ODA membranes respectively, while the separation factor are 1.93 and 8.9 for these two membranes respectively. 88.5 wt% concentration of MCPD was achieved in the circulated feed side ultimately.

Colossal permittivity (CP) in BaTiO3(BT)-based polycrystalline ceramics with normal grain sizes has been successfully obtained in yttrium (Y) doped BT ceramics (BYT) via a simple and effective method. Considering the necessary factors for CP formation mechanism, well designed doping condition and sintering procedure were carried out in the sample preparation. Characterizations show that BYT is with a pure tetragonal perovskite structure and the grain growth is depressed under the action of Y donor doping. The frequency independence of permittivity and Debye-like relaxation related to Maxwell-Wagner relaxation which occurred at the interfaces between semiconducting grains and insulating grain boundaries can be detected. These are induced by an internal barrier layer capacitance (IBLC)-type structure which formed under an overall and carefully designed synthesis procedure. But the temperature independence of permittivity does not arise because of the particular tetragonal structure and micron dimension grain sizes of BYT.

The shear deformation behavior of the course-grained Cu-8wt%Ag alloy processed by one pass of equal channel angular pressing (ECAP) was revealed through the metallurgical microscope and the scanning electron microscope. Through the macro-level and micro-level synthesis analysis, it is confirmed that there are two shear deformation during the ECAP processing: the one along the intersection plane (IP) and the other along the vertical plane to the IP. And it is estimated that theoretical ranges of two shear angles are-32°<θ1θ2

The sliding friction and wear behaviors of GCr15 steel against GCr15 steel under dry friction and grease lubrication were investigated on a reciprocating friction and wear tester consisting of a ball-on-disc friction pair. The morphologies of the worn surfaces of discs were analyzed by means of scanning electron microscopy (SEM). The result shows that GCr15 steel friction coefficient decreases with the increase of load, and the wear rate decreases with the time going by. There exist larger wear volumes on the friction surface under dry friction, while the wear volumes are relatively minor under grease lubrication. The SEM analysis agree with such results.

A new sacrificial Al-5Zn-0.03In-Er alloy was developed with improved microstructure consisting of Er rich phase and refined α-Al. This paper focused on the influence of Er as alloying element on the microstructure and hardness of Al-5Zn-0.03In alloy. With the increase of Er content, the α-Al was refined and the hardness was improved, at the same time a amount of Er rich phases and particles also appeared. The segregation of Er in the front of the solidification interface results in the refining of α-Al. The higher hardness of the Er containing alloy make it possilbe to apply the alloy under a complicated enviorment where the mechanical property is requred. It is concluded that 4 wt% Er is optimum to obtain the refined microstructure and proper hardness.

In this paper, the high voltage electric field drying characteristic of corn with different electrode forms and different pin electrode numbers are researched, and compared with rice drying under different pin electrode numbers. Results show that the drying effect of pin-disc is the best, then plate-disc, and the plate-mesh is the worst, it is better than the natural control group. The drying speed of the corn is faster than the rice in the pin-disc electric field drying, and the pin-electrode numbers has much influence on the drying effect, pin electrode number is not the more the better, and there is a best number of pin electrode, in this paper, the best number of electrode is three, however the best pin electrode number is different for different materials.

To solve the problems of high dimension, multicollinearity, easily over-fitting, this paper further studies characteristic wavelength selection method, and proposes the improved successive projections algorithm based on mean impact value algorithm (SPA-MIV). The results show that the proposed algorithm reduces data dimensions and improves data quality effectively. After being processed by improved successive projections algorithm, the determination coefficient of of testing set of moisture, ash and volatile PLS calibration models are increased to 0.9318, 0.9127, 0.9389, and the of testing set determination coefficient of moisture, ash and volatile BP neural network calibration models are 0.9645,0.9432,0.9536.

XLPE power cable is widely used in grid system for its series of merits, but the fault become more and more frequent with increase of the use of cable and longer run time. In this paper, the reasons of the fault are introduced and the on-line monitoring technique of XLPE power cables is presented.