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The interplay between PD and QLED units is revealed by regulating the thickness of the PbS layer and illumination intensity.

Chlorinated polyfluorinated ether sulfonates (Cl-PFESAs) are one kind of replacement chemistry for perfluorooctanesulfonate (PFOS). Recent studies have shown that Cl-PFESAs could interfere with thyroid function in animal models. However, epidemiological evidence on the link between Cl-PFESAs and thyroid function remains scarce. In this study, we focused on two representative legacy perfluoroalkyl substances (PFAS), including PFOS and perfluorooctanoic acid (PFOA), and two PFOS alternatives (6:2 and 8:2 Cl-PFESAs) in the general adult population from a cross-sectional study, the "Isomers of C8 Health Project in China". Three serum thyroid hormones (THs), thyroid stimulating hormone (TSH), free triiodothyronine (FT3), and free thyroxine (FT4), were measured. We fitted generalized linear regression, restricted cubic spline regression, and Bayesian kernel machine regression models to assess associations of individual Cl-PFESAs, legacy PFAS, and PFAS mixtures with THs, respectively. We found individual PFAS and their mixtures were nonlinearly associated with THs. The estimated changes of the TSH level (μIU/mL) at the 95th percentile of 6:2 Cl-PFESA and PFOS against the 5th percentile were -0.74 (95% CI: -0.94, -0.54) and -1.18 (95% CI: -1.37, -0.98), respectively. The present study provided epidemiological evidence for the association of 6:2 Cl-PFESA with thyroid hormone levels in the general adult population.

The distribution of cadmium (Cd) occurrence modes in a Naomaohu coal (NMH) and an Inner Mongolia high sulfur coal (GL) was investigated using the sequential chemical extraction method. The influence of the occurrence modes, final pyrolysis temperature, heating rate and residence time on the release behavior of Cd during the pyrolysis of two raw coals at 400–800°C in a horizontal/vertical tubular furnace was examined, respectively. The simulation of the migration and transformation of Cd under ideal conditions by FactSage software was carried out. The results show that Cd in NMH and GL is present in an organic matter state by 46% and 37%, a carbonate state by 32% and 24%, a disulfide state by 12% and 1%, and an aluminosilicate state by 10% and 38%, respectively. The distribution of occurrence modes seriously affects the volatilization behavior of Cd, in which the Cd in the organic matter state is easy to volatilize at low temperature, while those in the carbonate, aluminosilicate and sulfide state can volatilize at medium and high temperature; and reducing pyrolysis rate and extending residence time are conducive to the release of Cd. The FactSage simulation shows that Cd, CdO, Cd(OH)x and CdS are the major gaseous products of Cd during the pyrolysis of NMH and GL coal, and the difference of volatilization behavior of Cd in two kinds of coal is mainly determined by pyrolysis temperature, distribution of occurrence modes and coal rank, which are in good agreement with the experimental results.

BACKGROUND The global pandemic of coronavirus disease 2019 pneumonia poses a particular challenge to the emergency surgical treatment of elderly patients with high-risk acute abdominal diseases. Elderly patients are a high-risk group for surgical treatment. If the incarceration of gallstones cannot be relieved, emergency surgery is unavoidable. CASE SUMMARY We report an 89-year-old male patient with acute gangrenous cholecystitis and septic shock induced by incarcerated cholecystolithiasis. He had several coexisting, high-risk underlying diseases, had a history of radical gastrectomy for gastric cancer, and was taking aspirin before the operation. Nevertheless, he underwent emergency laparoscopic cholecystectomy, with maintenance of postoperative heart and lung function, successfully recovered, and was discharged on day 8 after the operation. CONCLUSION Emergency surgery for elderly patients with acute abdominal disease is safe and feasible during the coronavirus disease 2019 pandemic, the key is to abide strictly by the hospital’s epidemic prevention regulations, fully implement the epidemic prevention procedure for emergency surgery, fully prepare before the operation, accurately perform the operation, and carefully manage the patient postoperatively.

BACKGROUND: Hydrophobic interaction chromatography (HIC), as a typical separation technology, often suffers from low selectivity because it has a single interaction mode. Herein, a novel HIC resin (Octyl@BSA) with imprinted layer was synthesized and used for protein adsorption. Bovine serum albumin (BSA) and bovine serum γ‐globulin (bIgG) were used as model competitive proteins in this study. The effects of pH, salt type, concentration, and mass ratio were then investigated. RESULTS: The data from the static and dynamic adsorption experiments indicated that the introduction of spatial recognition effectively reduced the adsorption of competitive proteins, leading to significant improvements in selectivity. In comparison with raw HIC resin, Octyl@BSA retained a high binding capacity for BSA but rejected other proteins through spatial recognition. The maximum selectivity factors (α) of this resin may be close to 5. The adsorption kinetics and frontal adsorption experiments further confirmed the improvement in selectivity in batch and column mode. In addition, the recyclability of Octyl@BSA was tested using ten continuous BSA adsorption–desorption cycles. CONCLUSION: This study demonstrated that the introduction of spatial recognition was an effective strategy for enhancing the advantage of target proteins during competitive adsorption, leading to an improvement in selectivity for HIC. © 2020 Society of Chemical Industry

With the continuous development of the digital era, it is not only a technical means of processing information, but also a demonstration of scientific and technological progress. The advent of the digital era provides a new creative idea for us to reproduce the irreparable buildings. However, as a national granary, Fengtu Charity Warehouse is mainly displayed in a single scenic spot, lacking diversified display forms, which reduces the popularity of Fengtu Charity Warehouse.

Sarcodon aspratus is a popular edible fungus that has commonly been used as a functional food in China and other Asian countries. This study is conducted to examine the potential health benefits of Sarcodon aspratus polysaccharides (SATPs), on obesity and related metabolism disorders. C57BL/6J mice were fed with a high-fat diet (HFD) and supplemented with SATPs (100-400 mg kg-1) for 14 weeks. The results indicated that SATP treatment markedly reduced HFD-induced body weight gain and fat accumulation in a dose-dependent manner. SATPs could improve lipid homeostasis and glucose tolerance in HFD-fed mice. Furthermore, SATP intervention significantly attenuated hepatic steatosis, liver oxidative stress and inflammation. Additionally, we detected the macrophage and mRNA levels of lipogenesis markers in epididymal adipose tissues, and the results revealed that SATPs exerted inhibitory effects on the activation of immune cells and adipocyte differentiation in adipose tissues. High-throughput pyrosequencing of 16S rRNA suggested that SATP intervention was able to down-regulate the Firmicutes-to-Bacteroidetes ratio, and also increase the relative abundance of Lactobacillus, Bacteroides and Akkermansia in mice with HFD challenge. Taken together, SATPs showed ameliorative effects on hepatic steatosis, inflammation and adipocyte differentiation in HFD-fed mice. Notably, SATPs could modulate HFD-induced dysbiosis of gut microbiota. Thus, they might be a potential health supplement or prebiotic in the prevention of obesity and related metabolic disorders.

Alloyed Fe3Si intermetallic compound coatings were prepared through non-electrolysis high-temperature infiltration in molten salt on the surface of AISI420 and AISI304 stainless steel containing Cr and Cr, Ni elements, compared with Fe3Si coating on A3 carbon steel surface. The microstructure of infiltration coatings was examined by means of X-ray diffraction (XRD), scanning electron microscopy (SEM), and glow discharge optical emission spectroscopy. The electrochemical corrosion properties and behavior of Fe3Si coatings in H2SO4 solution were evaluated via electrochemical techniques and static immersion tests. The results revealed that the permeation coatings prepared on the stainless steel surface are composed of a Cr- and Cr-, Ni-alloyed Fe3Si intermetallic-compound layer and a diffusion layer. Owing to the presence of alloying elements Cr and Ni from the substrate, the permeation coatings were relatively thick, dense, and contained only a few defects. The Cr-, Ni-alloyed Fe3Si coating prepared on AISI304 surface was the most compact, contained fewer defects, and was thicker than the coating prepared on AISI420. The Fe3Si infiltration coatings exhibited significant passivation characteristics in 10 vol% H2SO4 aqueous solution. Alloyed Fe3Si coatings of AISI420 and AISI304 exhibit better corrosion resistance in 10 vol% and 20 vol% H2SO4 than the Fe3Si coating of carbon steel. Therefore, these coatings can protect both types of stainless steel from surface corrosion. The best corrosion resistance was realized for the alloyed Fe3Si coating on AISI304 surface. The corrosion resistance and protection performance of Fe3Si intermetallic-compound coatings in H2SO4 solution are directly correlated with the thickness, compactness, defect characteristics, and passivation properties of the infiltration coatings. However, alloying elements from the alloy steel substrates had a significant effect on these four factors, during the infiltration process in the molten salt.

Numerous epidemiological studies have investigated the lipid interference effects of legacy PFASs, however, no studies on PFAS alternatives and blood lipids have been published. In this study, we explored the association between Cl-PFESAs, a typical PFASs alternative in China, and blood lipid profiles in 1336 Guangzhou community residents using linear and non-linear regression models. The results showed a deleterious effect of Cl-PFESAs and blood lipids: adjusted estimates (β) for TC, TG, LDL-C and HDL-C per natural log unit increase of 6:2 Cl-PFESA were 0.029 (95% CI: 0.020, 0.038), 0.075 (95% CI: 0.049, 0.101), 0.035 (95% CI: 0.021, 0.049) and -0.071 (95% CI: -0.084, -0.058), respectively. The association between Cl-PFESAs and dyslipidemia was also positively significant (P 0.05). Furthermore, a non-linear relationship was observed in Cl-PFESAs and serum lipid levels using a restricted cubic splines (RCS) model. In summary, our research suggested a negative impact of Cl-PFESAs on blood lipid patterns and a possible non-linear association.

Background To investigate the effect of syphilis infection on the microstructure of white matter (WM) in HIV-infected male patients through comparing the differences of WM between HIV-infected male patients with and without syphilitic infection using diffusion tensor imaging (DTI).Methods 27 HIV-infected male patients with current syphilis or a history of syphilis (HIV+/syphilis+) and 29 HIV-infected male patients without syphilis co-infection history (HIV+/syphilis-) were enrolled. All patients received DTI and comprehensive neuropsychological assessment. Clinical data were compared between the two groups with T-test, Mann-Whitney U Test and Chi-square Test. Tract-based spatial statistics (TBSS) was adopted to analyze the DTI metrics. Multiple linear regression analysis was conducted to investigate the relationships between DTI metrics and clinical variables and cognitive performance. Results In the HIV+/syphilis+ group, decreased AD was found in the right superior corona radiata (SCR-R) and body of corpus callosum (BCC); increased RD was found in the bilateral posterior corona radiata (PCR), the right posterior thalamic radiation (PTR-R), the left SCR (SCR-L), splenium of corpus callosum (SCC) and BCC; decreased FA was found in multiple regions. AD in BCC was negatively correlated with CD4/CD8 ratios. AD in SCR-R was positively correlated with CD4/CD8 ratios. Patients in HIV+/syphilis+ group had a lower score in complex motor skills (CMS). RD in SCC and SCR-L was negatively correlated with CMS; RD in PTR-R was positively correlated with CMS. AD in SCR-R was positively correlated with CMS. Conclusions Compared with patients simply infected with HIV, the integrity of WM is more seriously impaired in HIV-infected patients with syphilis co-infection, and it may accelerate the impairment of cognitive function.

The efficient and rational development of tight gas reservoirs, most of which are deposit of multiple layers, is becoming a new global focus. The major tight gas reservoirs in China have multiple production layers. Gas wells are completed with multiple fracture treatments, and are commingled production. It is very difficult to effectively evaluate the single-layer production contribution and the use of each layer’s reserves. This paper presents an approach to solve the problem, which is basically based on the application of Pearson correlation analysis, catastrophe theory, and linear interpolation to calculate the single-layer production allocation rates. The method can quickly evaluate the stratified production of a large number of gas wells at different times through a computer program. The error of method validation, comparing the method prediction value with the production test data, is less than 10%. In field application, after the gas flows the discharge boundary, the production of the main layer will decrease due to the decrease in gas production of the multi-layer gas well, and other non-main layers may rise or have little change. In another case, the non-main layer can produce more natural gas for the gas well increases production. The method will also provide guidance for optimizing the perforation section of a gas well. Additionally, based on the production of a single gas well, the cumulative gas production of each layer can be calculated to evaluate the dynamic reserves of each layer and analyze the reserves utilization of each single layer. This work will finally provide guidance for gas well encryption to improve the multi-layer tight gas reservoir recovery.

Shenmu Gas Field is a multilayer tight sandstone gas reservoir with low vertical well production. The task of gas field productivity construction is heavy. It is an effective way to increase the production of a single well by excavating local superior areas and implementing horizontal well development. Therefore, it is necessary to evaluate the adaptability and establish the reservoir limits of horizontal well in Shenmu Gas Field. Systematically study the superposition mode and development scale of reservoir sand bodies, and use the reserve concentration to divide the multi-layer gas reservoirs into three types, and they are single-layer, double-layer and multi-layer, respectively. The numerical simulation method is used to compare the development effects of horizontal wells and vertical wells, to determine the reserves concentration limits and reserves physical property limits of horizontal well development. The selection criteria for geological targets suitable for horizontal well is established. The research shows that ① A large-scale composite effective reservoir is formed in the local area of the Taiyuan Formation and Shan2 Formation in Shenmu Gas Field, with a length of 1600–3200 m and a width of 800–2000 m, and it has the geological conditions for horizontal well development; ② the reserve concentration in the main development zone of the horizontal well should be over 75%, and it should have a continuous effective thickness of 5.0 m, The permeability ratio between the primary and the secondary layer should be between 0.8 and 3.9; ③ the Shenmu Gas Field is generally not suitable for large-scale horizontal well overall development, but is suitable for centralized development in local single-layer advantageous areas. The research result can provide technical support for the horizontal wells of similar gas reservoirs at home and abroad, and are of great significance for the efficient development of gas fields.

A novel block copolymer is fabricated by orthogonally coupling two end-functionalized polymers, glucose-capped methoxypoly(ethylene glycol) (mPEG2k-diol) and phenylboronic acid-capped poly(e-caprolactone) (PBA-PCL), with dual boronate ester and B N/B O dynamic covalent interactions. Due to their synergetic effect, this block copolymer can self-assemble into micelles in aqueous solution with high stability. More importantly, micellar disassembly can be only triggered in the presence of both signal inputs, acid and salt, displaying an “AND” logic-gate responsive behavior.

Neurodegenerative diseases, including Alzheimer’s disease (AD) and Parkinson’s disease (PD), are generally featured by neuroinflammation and procedural loss of selectively vulnerable...

Pressurized exploitation is one of the important measures to ensure the continuous and efficient exploitation of gas field by reducing wellhead pressure and increasing external transportation pressure in the later period of gas field exploitation. As a typical low permeability gas field, the south area of yulin gas field has entered a decline period. The surface gathering and transportation system has been unable to adapt to the development of middle and low pressure gas reservoirs. How to carry out pressurized mining economically and effectively has become an urgent problem to be solved. In view of difficulties in gas field development, key parameters such as the timing, mode, scale and minimum wellhead pressure of pressurized gas field exploitation were studied by taking production, gathering and transportation system and economic factors into consideration. The key technology of the pressurization of low permeability gas reservoir in southern yulin gas field is formed.

5-Fluorouracil (5-Fu) is an effective anticarcinogenic agent, however, continuous use of 5-Fu may cause severe side effects. The goal of this study was to investigate the effectiveness of Sarcodon aspratus polysaccharides (SATP) in alleviating 5-Fu-induced toxicity in Lewis tumor-bearing mice. Lewis tumor-bearing mice were treated with saline, SATP, 5-Fu or 5-Fu + SATP. The results indicated that compared to the 5-Fu group, the 5-Fu + SATP group showed effective amelioration of the liver, kidney and small intestine injury caused by 5-Fu and decreases in the levels of related biochemical indicators, such as aspartate aminotransferase (AST), alanine aminotransferase (ALT) and urea nitrogen (BUN). Additionally, the combination therapy enhanced the quality of life and immune organ indexes of mice. Further mechanistic studies indicated that the 5-Fu + SATP group showed a decrease in hepatotoxicity caused by 5-Fu via a reduction in the levels of interleukin-1β (IL-1β), an increase in the expression of Bcl-2 and decreases in the expression of p-p38, p-JNK and Bax. Collectively, the results indicated that SATP could significantly alleviate the toxicity of 5-Fu in Lewis tumor-bearing mice and showed the hepatoprotective capability of SATP via its effect on the expression levels of inflammatory factors and components of the MAPK/P38/JNK pathway, which shows that it may be a potential adjuvant for the chemotherapeutic drug 5-Fu in cancer treatment.

The Nb-30Ti-18Al alloys doped with the amounts of 0 at%, 1 at% and 5 at% carbon were prepared by arc melting and annealing. The effects of carbon addition on the microstructure and mechanical properties of Nb ss /Nb 3 Al in situ composites as well as the strengthening mechanisms were investigated. The results showed that during annealing at 1200 °C, supersaturated Nb ss decomposed and Nb 3 Al phase precipitated in C-free alloy, while carbide decomposed with the precipitation of Nb 3 Al in C-doped alloys. Furthermore, the orientation relationship of Nb 3 Al phase and the surrounding (Nb, Ti)C was observed in Nb-30Ti-18Al-5C (NA5) alloy. Additionally, with increasing the carbon content, the compressive strength of alloys at high temperature were improved significantly ascribed to the occurrence of solid solution and volume fraction increase of strengthen phase, while the fracture toughness decreased due to the volume fraction decrease of Nb ss .

The microstructure evolution and properties of an Al–Zn–Mg–Cu alloy were investigated under different non-linear cooling processes from the solution temperature, combined with in-situ electrical resistivity measurements, selected area diffraction patterns (SADPs), transmission electron microscopy (TEM), and tensile tests. The relative resistivity was calculated to characterize the phase transformation of the experimental alloy during different cooling processes. The results show that at high temperatures, the microstructure evolutions change from the directional diffusion of Zn and Mg atoms to the precipitation of S phase, depending on the cooling rate. At medium temperatures, η phase nucleates on Al 3 Zr dispersoids and grain boundaries under fast cooling conditions, while S phase precipitates under the slow cooling conditions. The strength and ductility of the aged alloy suffer a significant deterioration due to the heterogeneous precipitation in medium temperature range. At low temperatures, homogeneously nucleated GP zone, η ' and η phases precipitate.

To investigate the effect of Dahuang-Taoren with different proportion of extraction amount changes of ten kinds of chemical constituents in Rhizoma Rhei.Uniform method to set different ratio( 1∶ 5,2∶ 5,2∶ 3,1∶ 1,3∶ 2,5∶ 2,5∶ 1),and set the control group ( Dahuang-Taoren( 1 ∶ 0). HPLC was used to determine the content of ten constituents as gallic acid,( +)-catechin,sennoside B,anthraquinones( aloe-emodin,rhein,emodin,chrysophanol,physcion,chrysophanol-1-O-glucoside,emodin major grape glycoside) in different ratio of drug. Different proportions of Dahuang-Taoren on the extraction amount of ten chemical components in Rhizoma Rhei changes were analyzed. .Compared to the control group, Dahuang-Taoren with different ratio( 5∶ 1,5∶ 2,3∶ 2) in a sample with increasing proportion of Taoren,the extraction amount of ten kinds of constituents of Rhizoma Rhei gradually decreased;Dahuang-Taoren with ratio of 1∶ 1,ten kinds of constituents in extraction of total amount arrived minimum value. Dahuang-Taoren with different ratio( 2∶ 3,2∶ 5,1∶ 5) in a sample with increasing proportion of Taoren,the extraction amount of gallic acid,( +) catechin,chrysophanol of Rhizoma Rhei increased significantly.There is obvious change in chemical constituents of the extraction amount of Rhizoma Rhei with the change of the ratio in Dahuang-Taoren, and Dahuang-Taoren with the ratio( 2∶ 3,2∶ 5,1∶ 5),the extraction amount of gallic acid,( +)-catechin,sennoside B,aloe-emodin,emodin,chrysophanol,physcion,chrysophanol-1-O-glucoside are significantly higher than control group.

The effects of the solid solution conditions on the microstructure and tensile properties of Al–Zn–Mg–Cu aluminum alloy were investigated by in-situ resistivity measurement, optical microscopy (OM), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and tensile test. A radial basis function artificial neural network (RBF-ANN) model was developed for the analysis and prediction of the electrical resistivity of the tested alloy during the solid solution process. The results show that the model is capable of predicting the electrical resistivity with remarkable success. The correlation coefficient between the predicted results and experimental data is 0.9958 and the relative error is 0.33%. The predicted data were adopted to construct a novel physical picture which was defined as “solution resistivity map”. As revealed by the map, the optimum domain for the solid solution of the tested alloy is in the temperature range of 465–475 °C and solution time range of 50–60 min. In this domain, the solution of second particles and the recrystallization phenomenon will reach equilibrium.

Pure thin film, Sn/Ti, Sn/C composite thin film cathodes were prepared by magnetron sputtering technology. Electrochemical performance of these thin film cathodes for lithium ion battery has been investigated by scanning electron microscope (SEM), X-ray diffraction (XRD), galvanostatic charge and discharge, and cyclic voltammetry. For the pure tin thin film, the relationship between the 1st cycle capacity lost and SEI capacity was studied. And the reason of SEI capacity evolution versus deposition time was explained, where the 1st cycle capacity lost and cycle performance both decrease as the deposition time grown. For the composite thin film, the addition of Ti made the flat potential plateaus of lithium ion battery into a slop curve, but effectively improves the cycle performance. Although it caused some tin inactive to lithium ion.

Two reinforced concrete poles in one substation fractured suddenly, damaging a transformer and related equipment. So the causes of the fracture of the reinforced concrete poles are analyzed with macroscopic inspection, dimension measurement of inner wires, and other analysis methods of chemical composition and mechanical properties. The analysis results show that serious quality problems, including substandard tensile strength, substandard yield strength, unacceptable weight and unacceptable composition, as well as inadequate burial depth of the two poles during construction are the main causes of fracture.

In the paper, the neutral salt spray with various NaCl concentration was carried out, and effect of NaCl concentration on P92 steel corrosion behaviour was studied by weight loss, macro-appearances and scanning electron microscope/energy dispersive spectrometer (SEM/EDS). The results showed the formation rate and amount of corrosion product would rise according with elevated chloride ion concentration which were composed of ferric oxide and chromic oxide.The corrosion process of P92 steel during neutral salt spray was mainly non-uniform corrosion, the compact corrosion product formed in early stage could hinder the diffusion of corrosive ion.

To study the effect of polysaccharides from Polygonatum sibiricum on mRNA and protein expressions of blood lipid metabolism in hyperlipidemic mice. The mice were randomly divided into 6 groups, namely the blank control group, the hyperlipidemia model group, the simvastatin group, and low, middle and high-dose PSP groups (200, 400, 800 mg·kg⁻¹·d⁻¹). Each group of the mice was administrated intragastrically for 14 days, respectively. Subsequently, every group of mice, except for the blank control group, was intraperitoneally injected with 75% fresh egg yolk emulsion for establishing the hyperlipidemic mice model. Upon completion of the administration, the contents of TC, TG, LDL-C and HDL-C in serum of each group were investigated in details. In particular, the mRNA expression levels of PPAR-α, PPAR

Streptococcus pneumoniae (S. pneumoniae) was one common pathogen that caused pneumonia, meningitis, otitis media, and sepsis. The traditional culture methods costed long time and omission often existed. A new method was developed based on Loop-mediated Isothermal Amplification (LAMP). A series of primers of autolysin (lytA) from S. pneumoniae were designed with specific primers soft, and set up LAMP system in detection of S. pneumoniae. Comparison of specificity and sensitivity results with culture and PCR method in 50 samples collected from patients with respiratory infections. The data demonstrated that the selected primers and reaction system in LAMP were respond to S. pneumoniae,not cross reacted to others bacteria. The detection of sensitivity to LAMP was 102CFU/mL. All of clinical specimens in the test, 9 cases (18.0%) were confirmed to be positive as S. pneumoniae,whereas, only 4(8.0%) were diagnosed by culture method. The LAMP technology has a specific, simple and accurate characteristic in differentiation S. Pneumoniae from clinical specimen.

The method of day-ahead dynamic economic dispatch is applied to the micro-grid composed of photovoltaic (PV) generation system and batteries to make its operational cost minimized. The battery life was converted cost and added to the objective function. Micro-grid’s mathematical model of economic dispatch was set up. Mathematical model of economic dispatch was solved by using the method of real population genetic algorithm. The charge and discharge plan of battery in micro-grid and buying or selling electricity plan between micro-grid and State Grid was established at the same time. Taking real data of Shanghai Electric Group’s micro-grid for case study, the dynamic economic dispatch is compared with traditional dispatch strategy. The results verify the effectiveness of the dynamic economic.

The motor temperature rise is an important indicator for the evaluation of motor performance and the development of motor testing system put forward higher requirements to data acquisition and processing. In view of this, the motor temperature rise test system based on the magnetic power dynamometer which acted as a load was studied. The overall structure and the software algorithm of the system were introduced. The existing synchronous sampling method was put into use in data acquisition system of the motor temperature rise test so that it can automatically test the motor temperature rise. Combining with the instance, proves the accuracy of this method. This method has the superiority of reducing errors and improving accuracy by combining with the instance.

The paper introduces the advantage of the application of new energy generation, and then describes the structure of a smart micro-grid system built on an island which includes wind, solar, tidal-wave energy system. The method of day-ahead optimal operation was applied to smart micro-grid system on the island to minimize the operation cost by using genetic algorithm. Taking actual datum of Shanghai Electric Group’s micro-grid for case study, the dynamic economic dispatch is compared with traditional dispatch strategy. The results verify the effectiveness of the dynamic economic.

The isothermal hot compression tests were carried out on Gleeble-3500 thermo mechanical simulator in the temperature range of 1323–1473 K and strain rates of 0.01 s−1, 0.1 s−1, 1 s−1 and 10 s−1. Based on the experimental results, a modified Johnson Cook model is proposed to describe the flow behavior of T24 steel. The modified model considers not only the yield and strain hardening portion of the original model but also the coupled effects of strain and temperature, and of strain rate and temperature on the flow behaviors. The high temperature deformation behavior of T24 steel was characterized based on the analysis of the stress-strain curves. The results showed that the flow stress predicted by the proposed model agrees well with the experimental stress, which validates the efficiency of the modified model in describing the deformation behavior of the steel. The true stress–true strain curves exhibit a peak stress at a very small strain, after which the flow stresses decrease until high strains, showing a typical dynamic recrystallization (DRX) behavior of the steel under the deformation conditions of lower strain rates.

Effect of quenching process on the microstructure and mechanical properties of a kind of seamless tubes of steel 28CrMnMoV was investigated. Then, an investigation on the influence of two different quenching processes on the ductile-brittle transition behavior of this steel was undertaken. The ductile-brittle transition temperatures of the steel by two different quenching processes were also determined. The results show that a good combination of mechanical properties can be obtained through austenitizing experimental steel at 800 °C or 890 °C followed by tempering at 630 °C. Ductile-to-brittle transition temperature of 28CrMnMoV steel austenitized at 800 °C followed by tempering at 640 °C is about −73 °C, which is much lower than the value −37 °C when the steel was austenitized at 890°C and then tempered at 650 °C. This indicates that subcritical quenching process could decrease largely the ductile-to-brittle transition temperature of 28CrMnMoV steel.

The quench sensitivity of 6063 alloy was investigated via constructing time−temperature−property (TTP) curves by interrupted quenching technique and transmission electron microscopy (TEM) analysis. The results show that the quench sensitivity of 6063 alloy is lower than that of 6061 or 6082 alloy, and the critical temperature ranges from 300 to 410 °C with the nose temperature of about 360 °C. From TEM analysis, heterogeneous precipitate β-Mg2Si is prior to nucleate on the (AlxFeySiz) dispersoids in the critical temperature range, and grows up most rapidly at the nose temperature of 360 °C. The heterogeneous precipitation leads to a low concentration of solute, which consequently reduces the amount of the strengthening phase β'' after aging. In the large-scale industrial production of 6063 alloy, the cooling rate during quenching should be enhanced as high as possible in the quenching sensitive temperature range (410−300 °C) to suppress the heterogeneous precipitation to get optimal mechanical properties, and it should be slowed down properly from the solution temperature to 410 °C and below 300 °C to reduce the residual stress.

Energy-saving is one of the inevitable problems of the routing design in WSN, while Data Fusion technology is widely utilized in energy constraint WSN to reduce the amount of messages exchanged between sensor nodes. This paper proposes a new algorithm based on Integrated Genetic and BP Neural Network(IGBP), IGBP uses the global search capability of GA to remedy the deficiency of BP artificial neural network. First, IGBP generates the best individuals in different networks by GA algorithm. Then it chooses the most optimize individual measure by Mean Squared Error to construct the BP network which was supplied to train of the WSN. Using the optimize individual nodes as initialization value training the BP network, it will enhance the learning rates of convergence and avoid falling into the local minimums .The simulation results show that the IGBP algorithm has made great progress in balancing the consumption of energy so as to prolong the network lifetime.

The true stress–strain data from isothermal hot compression tests, in a wide range of temperatures (1173–1473 K) and strain rates (0.01–10 s −1 ), were employed to study the deformation behavior and develop constitutive equation of V150 grade oil casing steel based on an Arrhenius-type equation. The flow stress increases with the decrease of deformation temperature and the increase of strain rate, which can be represented by Zener–Hollomon parameter in an exponential equation. The influence of strain was incorporated in the developed constitutive equation by considering the effect of strain on material constants. The flow stress predicted by the constitutive equation shows good agreement with the experimental value through the whole experimental temperature and strain rate range except a slight deviation for predicting the stress deformed at 1173 K under 0.01 s −1 , and the average relative error is 4.21%.

Mg-10Ho-0.6Zr alloys with different amount of Y additions are prepared by metal mould casting method. The effects of Y content on microstructure, age hardening behavior and mechanical properties are investigated. Results show that all the as-cast Mg-10Ho-xY-0.6Zr alloys are mainly comprised of α-Mg matrix and Mg24(Ho,Y)5phase. With increasing Y content, grain size of the as-cast alloys is reduced. Age hardening response, Vickers hardness and mechanical properties are improved with the addition of Y. The maximum ultimate tensile strength (UTS) and yield strength (YS) are obtained in Mg-10Ho-3Y-0.6Zr alloy at peak-aged state, and the values are 215 MPa, 158 MPa at room temperature, and 144 MPa, 126 MPa at 250 °C, respectively. The improvement of the UTS is mainly attributed to the fine distributed quadrate-like β stable phase. Key words: Mg-Ho-Y-Zr alloy; Microstructure; Age hardening behavior; Mechanical properties