This paper has quantitatively predicted the groundwater level variation in Baoding City based on BP neural network model, regression analysis model, time series model, and Markov model. It can be concluded that the prediction accuracy of BP neural network model and time series model is the highest, and...

For the structural limit state function with the multiple most probable failure points(MPP) and the multiple most probable failure domains, the reliability computation error generated by the First Order Reliability Method (FORM) or the Second Order Reliability Method (SORM) is unacceptable in some important...

as one kind of airport, highway runway must be tested and assessed on scene before enable. Aimed at the situation of our country is short of performance index test regulations and methods, this research discussed the test characteristics and demands through several side like vehicle drive, traffic security,...

In order to investigate the the mathematical model considering the skewness-parameter, which covers the shortage of long-span bridge in sensitive parameter analyzing. Random variable along with its statistic probability model is taken. The application of influence coefficient helps to build up a determining...

In order to study the effect of pounding at expansion joints of beam bridge on the seismic responses of bridge structure during earthquake, the research is based on multi-particle of single degree of freedom system, and the pounding effects of adjacent girders on seismic responses with 3 different of...

When the construction wastes were used as raw materials of Recycled concrete, the type and replacement ratio of recycled aggregates should be considered in addition to mix proportion. It is very difficult to describe the complicated nonlinear relationship between different indexes. Through analyzing...

The purpose of this study is to calculate the reliability of the mechanical sand washing system. The basic principle and process flow of the sand washing system are introduced. According to the structural characteristic of the sand washing system, the simplified reliability model of the system is established....

The performance factors of a R290 variable frequency heat pump water heater are experimentally studied. The performance factors including COP, heating time, consumption power , compression ratio, degree of super heat and degree of sub cooling with the frequencies changing from 40Hz to 90Hz are discussed....

Integration of regional culture and urban park is an important approach of landscape transformation. Landscape reconstruction of modern urban park must fully excavate and coalesce the regional culture element, in order to create new landscape with more vitality. Based on regional culture and landscape...

Through summing up, statistical parameters of steel material property based on new standards and statistical parameters of geometry property of steel-concrete composite beams are obtained. Testing datum of steel-concrete composite beam in bending state and its connecting piece in shearing state is roundly...

In view of the complex factors affecting the reliability of the main shaft of a nuclear power CNC wheel milling machine, a finite element analysis model is established by using the ANSYS parametric modeling technique and the finite element analysis model of the machine tool spindle, which will affect...

The weak axis of I-section column welded the vertical stiffener to simulate the form of strong axis connection. The seismic behavior of joint region and the affections on the ultimate bearing capacity of beam by changing the thickness of skin panel have been analyzed. The hysteretic behavior of joint...

In this paper, a three-dimensional model of the melt conveying section of a PVC Wood-Plastic single-screw extruder has been constructed and the corresponding mesh file has been established through Mesh Superposition Techniques (MST). Then the rheological experimental results and material viscosity model...

The rock structure is extremely complex, it is difficult to reflect the mechanical properties and the relevant failure mechanisms truly under loads whatever by the theoretical analysis or the laboratory test. In order to analyze the damage characteristics of the crossover jointed rock mass from the microscopic...

Using city region as the study unit, this paper utilizes spatial statistical analysis methods to analyze the spatial distribution characteristics, spatial correlations, as well as the difference degrees of sector value-added growth rates for all cities of Henan province in 2011-2014. The results show...

The high ground temperature is a prominent problem in the construction of deep buried long tunnels. Based on the analysis of high ground temperature in existing tunnels, the influence of high ground temperature on tunnel construction was divided into three situations, namely the harm to human body, effects...

Monitoring is an important work to measure the rationality of tunnel design and construction, especially for highway tunnel with small spacing. The design of construction monitoring scheme was analyzed based on a practice of small spacing tunnel engineering. The method to determine the monitoring items,...

The construction of underground engineering will bring risks and potential hazards to the adjacent tunnel engineering. A series of numerical analysis models have been built to analyze the influence of underground engineering construction having on adjacent tunnel structure under different horizontal...

The paper utilizes the linear transformation in the analysis of covariance matrix of observed values about natural phenomenon, while computing eigenvalues, the corresponding determinant value is calculated , at last the relationship between the eigenvalues and determinant value is given.

A novel piezoelectric smart concrete beam composed of a concrete beam, a piezoelectric actuator and a counterforce device is developed and investigated. Based on the governing equation of ‘actuating force-voltage’ of piezoelectric actuator proposed by the authors, a nonlinear analysis program, in which...

In this paper, the rigid slab hypothesis, which is widely used in high-rise buildings, would be discussed. The modal analysis results for two building structures would be presented and compared based on the ISSS [1-4], with and without rigid slab hypothesis respectively. It could be observed from the...

According to disease investigation and analysis of cement concrete overlay of G322 secondary road, analysis model is built by ABAQUS finite element software, vehicle load stress, temperature stress and uneven settlement of widening subgrade and other external factors of cement overlay are considered,...

In this paper, we created a remote mobile controlled and monitored vehicle system, which is used in the self-driving and self-parking cars for the last kilometer. The system consists of three main parts: the car-mounted terminal, which is installed in the car for receiving remote orders from the mobile...

The tensile fatigue property of steel fiber reinforced concrete (SFRC) was studied. In an axial tensile fatigue experiment, 52 prismatic specimens were tested under various stress conditions. A significant increase is found in the fatigue life of SFRC comparing to that of ordinary concrete. The results...

At present, in the steel tube tower, all the diagonal members’ axial leads intersect on the main members’ axial leads which would always cause the large size of node plate. The existing theoretical analysis shows that negative eccentricity of node connection can decrease the size of node plate, reduce...

In the process of finite element analysis about space truss structure, the problem of plane node must be dealt with. Generally, there are four methods about plane node, void- rod element method, removal freedom method, adding virtual spring method, method of beam element. In this paper a new treatment...

This Ab initio density functional theory calculations have been used to study the properties of point defects for hexagonal close-packed (hcp) Dysprosium (Dy), e.g., the formation energies of self-interstitial atoms (SIAs), mon-vacancy, interstitial H atoms and interstitial He atoms. The results indicate...

Dynamic in-situ monitoring is one of the important measures to ensure the stability of high slope engineering. Combined with a practical project, and based on the analysis of data that have been collected about the deformation of slope surface and interior and the stress state of support structures,...

A new Lagrangian quadratic finite volume element method based on optimal stress points was presented for solving one-dimensional parabolic problem with trial and test spaces as the Lagrangian quadratic finite volume element space and the piecewise constant function space respectively. It is proved that...

The emergence of harmful gas will bring serious difficulties to the tunnel construction, improper handling can easily lead to accidents. In order to evaluate the possibility of harmful gas in the tunnel, the basic characteristics of harmful gas in tunnel are analyzed from three aspects, that is spatial...

In this paper, through the compressive test of three graded dam concrete, using the method of strain electric testing, recording the value of stress and strain synchronously. A new strain sensor which was designed and processed is proved that is cheap, convenient, and can be used widely.

Through test on flexural behavior of 2 CBF bar reinforced concrete simple-supported beams on three-point static loading until failure, the experiment researches and analyzes the differences of the crack distribution, the ultimate bearing capacity, the load-deflection relationship and the impact of crack...

The dynamic disturbance to the remaining surrounding rock mass of underground caverns produced by blasting excavation can not be ignored. Considering the rock mass damage induced by compression-shear stress in the zone near the blasthole, the KUS dynamic damage constitutive model was improved, and adding...

Fissures in the high stress mass of deep buried had a great influence on mechanical properties and wave velocity of rock mass. Based on similarity theory, Rock like materials simulated deep buried marble of Jinping-II Hydropower Station. Under different fracture and different confining pressure, the...

Photosynthetic characteristics of seedlings of Carallia brachiata, Ficus microcarpa and Phoebe zhennan were studied at 6°C low temperature stress using Artificial Climate Box. After continuous treatments of 0 d, 2 d, 4 d, 6 d and a recovery of 2 d in nature, the photosynthetic indexes of the seedlings...

Polyurethane prodrugs with different drug contents were synthesized using polycaprolactone, hexamethylene diisocyanate and ciprofloxacin. The thermal analysis of the materials was carried out by DSC and TG. Results showed that the crystallinity of the materials reduced as the drug contents increased...

The purpose of the present study was to evaluate the anti-fatigue and anti-hypoxic effects of Lycium barbarum polysaccharides (LBP) in mice. The mice were randomly divided into four groups, a control group and three treatment groups. The treated groups received different doses of LBP (125, 250 and 500...

The study deals with the visible-light-driven photodegradation of dye pollutants, especially for methylene blue(MO) over silver phosphate photocatalyst. The Ag3PO4 photocatalyst was synthesized by a simple ultrasonic-assisted ion-exchange method in weak acidity solution including silver nitrate, sodium...

A microbial fuel cell (MFC)-based biosensor can be used to detect the water toxicity. In this study, the solitary and joint biotoxicities of heavy metal ions (Cu2+, Ni2+, Cd2+) and acephate were investigated using single-chamber MFC. The results showed that all the contaminants could individually inhibit...

To evaluate the environmental safety of the joint action of nano-TiO2 and nano-carbon, Microcystis aeruginosa was used as the model organism to explore the effect of different concentration of nano- TiO2 and nano-carbon on the growth of algae. This experiment suggested that the growth of algae will be...

Chitin has good biological activity, but the nature of the shell element is difficult to dissolve in water severely restrict its application in many fields. Through chemical modification, as the hydroxyl group to change its characteristics of different preparation of chitin, and were characterized by...

The ternary complex of Eu(Gly)2(Ala)3Cl3•2H2O(Gly = Glycine and Ala = Alanine) was synthesized and characterized by comparison of elementary analysis, chemical analysis, thermogravimetric analysis, and data with corresponding. The dissolution enthalpies of the EuCl3 •6H2O(s), 2Gly(s) + 3Ala(s) and Eu(Gly)2(Ala)3Cl3•2H2O(s)...

This design uses High Performance Capillary Electrophoresis (HPCE) to determine the Paeonol’s content in huangliansu tablets. Electrophoresis separation controlled conditions for uncoated fused silica capillary column (75 m×52 /60cm) injection height 7.5cm, and using a concentration of 40 mmol/L borax...

This design uses High Performance Capillary Electrophoresis (HPCE) to determine the Paeonol’s content in Cynanchum paniculatum. Electrophoresis separation controlled conditions for uncoated fused silica capillary column (75 m×52 /60cm) injection height 7.5cm, and using a concentration of 40mmol/L borax...

T-5 strains of Mortierella were screened from soil sample, which had a high lipid contents. Through the orthogonal experiment, the optimization conditions of lipid were that temperature was 28°C, pH was 6.0, glucose concentration was 100g/L and inorganic nitrogen source concentration was 1g/L. The results...

The fluidization condition in the SO2 photocatalytic reactor was optimizated by simulating the aspects of raw materials’ physical properties (particle size, density) and operating conditions(packing height, inlet gas velocity). The results indicated that particle size and inlet gas velocity had a remarkable...

SH3 (Src homology 3) domain is a small modules units (~60 amino acids) that are important for the generation of protein-protein interactions in cellular signal transduction pathways. SH3 domains commonly bind to proline-rich sequences. Here, we explore the SH3 domain proteins in Monascus purpureus. A...

In all eukaryotes, the peripheral endoplasmic reticulum (ER) branches out of the nuclear envelope as a membrane network of interconnected tubules and membrane sheets with a single lumen. In yeast, Rtn1p and Yop1p are major, redundant components required to maintain the tubular ER under normal circumstances....

This study was conducted to investigate the effect of natural flavonoid quercetin on exercise-induced oxidative damage. Twenty-eight rats were randomly divided into four groups, a control and three quercetin administered groups (20, 40 and 60 mg/kg). Quercetin was orally administered to rats once a day...

This design uses High Performance Capillary Electrophoresis (HPCE) to determine the Paeonol’s content in yanyan tablets. Electrophoresis separation controlled conditions for uncoated fused silica capillary column (75 m×52 /60cm) injection height 7.5cm, and using a concentration of 40mmol/L borax solution...

The High Performance Capillary Electrophoresis (HPCE) method was established for thr determination the paeonol content in Mingmu Dihuang pill. 40mmol/L borax solution buffer was used for the electrophoresis analysis. Measured paeonol content in Mingmu Dihuang pill was 1.698 mg/g (RSD=10.8%) (n = 4).

The influence of feed particle size on the pyrolysis products, pyrolysis time, pyrolysis energy consumption and the percentage of dust content in volatile product was investigated in the fixed bed reactor. The results showed that with feed particle size increase, pyrolysis time and the percentage of...

In this paper, four lab-scale sequencing batch reactors (SBRs) operated with anaerobic/anoxic configuration were long-term cultured, respectively with different ratios of propionic to acetic acid as carbon sources. Effects of propionic to acetic acid ratio on polyhydroxyalkanoates (PHA) formation, denitrifying...

By enzyme-linked immunosorbent ELISA experiments, Determination of human skin fibroblasts (HSF) and macrophages (white blood cells by monocytes in THP 1) induced by PDGF after 6-carboxyl chitin stimulation, TGF-beta, and the expression of bFGF. The results showed that 6-carboxyl chitin can promote the...

This paper mainly studies the effected of fuel injection time on combustion and emissions of the four kinds of different proportions of N-butanol alcohol and diesel fuel mixed without changing the injection duration and mass under the software of FIRE. It provides the theory basis for the further development...

Nano-ZnO was successfully synthesized by a sol-gel method with an average size of 26.1 nm. The nano-ZnO was applied to coat the knitted poly(lactic acid) (PLA) fabric with or without further coating using a polyacrylate binder, and the UV protection ability and antibacterial activity of the coated fabric...

Bioconversion of cellulose and xylose is critical for the economically utilization of lignocellulose resources. Cellulose and xylose utilized strain Bacillus cereus Yc-A1 with highly ethanol endurance ability was present. The strain Yc-A1 was identified according to the physiological and phylogenetic...

The Japanese banana flower and pollen were analyzed by gas chromatography-mass spectrometry (GC-MS) technique, coupled with head-space solid micro-extraction (HS-SPME). The relative percentage of compounds were measured by retention index and peak area normalization method. A total of 48 volatiles were...

Therelationship between the energy of a high-speed proton when impacting onthe N-4 nuclear emulsion plane perpendicularlyand its range in the emulsion was investigated using classical SRIMMonte Carlo programand curve fitting method. A definite analytic expression was derived from this simulation with...

Based on the topological theory and MATLAB program, molecular connectivity index (Xi), molecular shape index (Ki), electrotopological state index (Ei) and electro-negativity distance vector (Mi) were calculated for 117 nitrogen-containing polycyclic aromatic hydrocarbons. A eight-element regression model...

In this study, the flocculation and sedimentation performance of thermophilic activated sludge with single and multiple dosing of trivalent aluminum (Al3+) were studied. The thermophilic activated sludge samples were cultivated in sequencing batch reactors at 55 °C. The dosages of Al3+ were 0.125, 0.5,...

Polyaniline (PANI) nanofibers were prepared in dilute polymerization system in the presence of organic solvents including acetone and ethanol. The as-prepared PANI nanofibers were characterized by field emission scanning electron microscopy, ultraviolet-visible absorption spectroscopy, Fourier transform...

Polyaniline (PANI) was prepared through in-situ chemical oxidative polymerization of aniline monomers in the presence of nanocelluloses. The as-prepared nanocomposite was characterized by scanning electron microscopy, Fourier transform infrared spectrometry, X-ray diffraction analysis and electrochemical...

The cellulose acetate (CA) nanofibrous mat was fabricated by electrospinning under optimized spinning conditions in this work. The morphology, chemical structure, thermal stability and hydrophilic property of as-prepared CA nanofibrous mat were characterized by scanning electron microscopy, Fourier transform...

A new type of macroporous weakly basic anion exchange resin (HFO D301R) was used to adsorption of naphthalene sulfonic acid in different environments. The effects of temperature, salt concentration and pH value of the solution on HFO- naphthalene sulfonic acid resin adsorption effect were studied The...

Rare earth element (REE) compositions in ceramics from the Tongguanyao site (TGY) of China were determined by the inductively coupled plasma-mass spectrometry (ICP-MS) to compare their sources. Total REE concentrations of 14 samples range from 120.9 to 453 g•g-1, with an average value of 228.5 g•g-1....

Phenol,as one of the main constituents of biomass tar, was used to gasify for hydrogen in this paper. It was studied that the influences of the reaction temperature, steam / biomass (S / B), load and the preparationof the catalyst on the hydrogen yield, gasification efficiency and hydrogen concentration....

Objective: Salvia miltiorrhiza is a traditional Chinese herb medicine and is widely used in clinic application. This study is intended to extract flavones from Salvia miltiorrhiza by ultrasonic method in order to evaluate its antioxidation activity. 2. Methods: (1) Spectrophotometry is used to determine...

A fast, eco-friendly and reliable method combining dispersive liquid-liquid microextracion (DLLME) with capillary gas chromatography (GC) was developed for the simultaneous determination of p-dichlorobenzene (p-DCB), o-dichlorobenzene (o-DCB), nitrobenze (NB), 1,2,4-trichlorobenzene (TCB), and 3-nitrotoluene...

The synthesis of (R)-3-((4-methoxybenzyl)oxy)butanal, which is an intermediate of (-)-Allosedridine, a 2-substituted piperidine alkaloid, was described, The route started from (R)-methyl 3-hydroxybutanoate via a PMB protection, a LiAlH4 reduction and a Swern oxidation.

Synthesis of (±)-2-(6-ethyl-2-(4-methoxyphenyl)-1, 3-dioxan-4-yl) acetaldehyde, an important intermediate of (±)-Cyanolide A (1), was described, which was commenced from commercially available methyl acetoacetate.

A synthetic design of (±)vertine and (±)-lythrine was described, and the intermediate, N-protected 2-methoxypiperidine, was synthesized, which contains a protection, reduction and etherification

A synthetic design of Entecavir was described, and the intermediate, (S)-N-methoxy -3-((4-methoxybenzyl)oxy)-N-methylpent-4-enamide, was synthesized using acrylaldehyde as the starting material, which was obtained via an Evans Aldol reaction, Weinreb amide formation, and a PMB protection.

An ultrasonic microdialysis coupled with online capillary electrophoresis electrochemiluminescence method has been established for the sensitive determination of plasma protein binding. The drug and blood plasma were mixed in different molar ratios and incubated at 37 °C in 10 mmol/L phosphate buffer...

To study the influence of doping on p-type solar cells, we use the p-type NiO/CdTeO3 structure to fabricate Mg-doped CdTeO3 quantum dot-sensitized solar cells (QDSSCs), by doping CdTeO3-sensitized NiO photocathode with dopant element Mg. When the doping ratio of Mg is 1:30 and the successive ionic layer...

Cytotoxic activity of Artesunate(ART) was determined by MTT assay at various concentrations ranging from 0 to 100 mol/L on Hela cells. The apoptosis effect of Hela cells treated with ART was observed by a phase contrast microscope. The Apoptosis and its mechanism induced by ART were also studied by real-time...