We construct a coastal monitoring buoy network based on the Shandong specific coastal geographic environment. It covers such area as distant sea, offshore and coast and extends from coast to 60 miles away from coast. We also perform its optimization. It can detect ocean pollution, red tide, sea water quality, and effectively monitor storm tide and typhoon.
This paper presents a wavelet transform based signal noise reduction algorithm for the signal denoising problem of the determination of seawater total organic carbon. This Visual C++ implemented algorithm decomposes the collected signal, removes the high frequency signal components and reconstructs back to the noise reduction signal. Experiments show that the algorithm is simple and effective and can achieve good noise reduction effect.
We developed a chemiluminescence based total organic carbon (TOC) online seawater analyzer for the requirement of ocean ecological investigation to TOC. This instrument is based on SOC technology, and includes an ARM instruction set based microprocessor S3C2440 and an embedded Windows CE operating system. A vast number of online tests show that this analyzer can guarantee not only measurement precision but also higher measurement speed, so it has better application potency.
This paper surveys the characteristics, classification and the parameters matching for the technology of keyhole plasma arc welding. Keyhole plasma arc welding can cause a special keyhole, with which welding speed, workpiece thickness and welding efficiency will be all increased significantly. It can be generalized to constant, pulsed, variable polarity and special plasma arc welding, so it can satisfy special requirements of many different industries. This paper is quite significant to guide welding practice and increase productivity and the quality of welding joints.
We obtained a strain of oilrich [WTBX]Nitzschia closterium[WTBZ] (BC6) through UVinduction. We further investigated the effects of different culture conditions such as temperature, irradiance, pH value, salinity and nitrogen concentration on its growth. The OD680 and growth rate were determined every two days. Experimental results show that the optimum culture conditions are temperature of 20 ℃, pH value of 7.5, irradiance of 54 μmol·m-2·s-1, NaNO3 concentration of 105 mg·L-1and NaCl concentration of 27 g·L-1. Its highest cell density can reach 1.69×106/mL, 2.2 times higher than that of nonoptimization, under these optimal conditions.
We investigated bryophyte from ten different sampling sites and made a comparison among their species. We altogether collected 365 specimens, which belonged to 62 species, 33 genera and 15 families.Gymnostomum calcareum, Weisia planifolia and Physcomitrium eurystomum were the prevalent species. They can serve as the primary plants for the ecological restoration of an industrial area.
This paper presented a new method for isolation and culture of lichenized fungi and lichen endophyte fungi. We directly selected medulla mycelium for cultivation with PDA nutrition medium. The growth rate of the community of lichenized fungi was 80.43%, while the contamination rate was only 7.14% under the conditions of nutrition medium of 25℃ and 14 days later. The superiority of this method was therefore simplicity, highefficiency and low contamination rate.
We investigated the influences of drought stress on the seed germination and seedling physiology of Malus robusta, which was simulated with different concentrations of PEG solution. Results show that the relative germination rate, germination potential, germination index and vigor index of the seeds processed with PEG decrease with the increase of stress intensity. SOD activity of the seedlings increases with the increase of PEG concentration, while POD activity demonstrates the opposite tendency. MDA and proline content increase with the increase of stress intensity. This indicates that higher PEG concentration cause worse damage to the seedlings of Malus robusta.
We obtained 23 strains of cellulosedegrading bacteria with rapid growth, big transparent ring and stable performance, which were isolated and screened from natural decay residues.We then acquired a stable composite microbial system of cellulosedegrading bacteria under constant temperature constituted by 14 effective and stable cellulosedegrading bacteria through determination of cellulosedegrading rate and backscreening. This system has 40. 7% stable wheatstraw degrading rate in 96 hours under constant temperature.
We theoretically investigated the cubic dynamics characteristics of the reaction He+H2+ with quasiclassical trajectory (QCT) method and a new potential energy surface (PES). Results show that integral section fits well with the experimental results. Product HeH+ demonstrates different rotational polarization characteristics for different collision energies. Its rotational angular momentum vectors j′ are not only aligned, but also oriental. Product HeH+ tends to be scattered forward with the increase of collision energy.
We investigate the transport properties of a open circular quantum billiard in weak magnetic field with a semiclassical theory. We also obtain the elements of transmission matrix with semiclassical approximation Green′s function and eigenfunctions. We further calculate classical trajectories of an electron, and compare the quantum spectral peak positions of transmission matrix elements with the length of electronic classical orbit.Results show that the peak positions are well consistent with the orbit length. This demonstrates that the heterojunction is a good theoretical model to describe the microstructure of electron conduction.
We made uniform single phase β-FeSi2 films on Si (100) substrate with a Nd:YAG pulsed laser of 1064 nm (output wavelength), pulsed laser deposition (PLD) and thermal annealing process. We further investigated the structure and surface morphology with atomic force microscope (AFM),scanning electron microscope (SEM) and X-ray diffraction (XRD) method. Experimental results show the crystallization degree, size and shape of the grains and surface roughness are all regularly changed with the increase of sputtering time. We discovered that 40 minutes is the optimal sputtering time under the present experimental conditions after comparing the different sputtering time.
Let G be a finite, simple and undirected graph and U be its edge subset If G - U is disconnected and each component of G - U contains at least four vertices, then such an edge set is 4-restricted edgecut of G. The 4-restricted edgecut U whose cardinality is the smallest is called a λ4- cut, and its cardinality is called the 4-restricted edgeconnectivity, denoted by λ4=λ4(G) . G is λ4- optimal if λ4=ξ4(G) and super -λ4 if every λ4-cut isolates a connected subgraph of order 4. This paper presents some sufficient conditions for a λ4- optimal and super -λ4 graph with the neighborhood intersection condition.
A graph G is a[s,t]- graph if there are at least t edges in its every included subgraph of s vertices.This paper proves that any cycle C satisfying 5≤|C|≤|G| is extendable in a almost locally connected [4,2]- graph.
A graph G is a [s,t]- graph if there are at least t edges in every included subgraph of s vertices. This paper proves that the sufficient and necessary condition of a 2-connected [4,1]- graph to be a Hamilton cycle is that it is not isomorphic to three kinds of specific graphs.
How to impersonally and effectively assess the pharmacological effects of traditional Chinese medicine (TCM) is one of the difficulties confronting the modern research of TCM. This paper establishes a neural network model for the assessment of pharmacological effects of traditional Chinese medicine Huang Qin. We train this model with massive data and adjust its model parameters. We therefore construct a union effect assessment system for the traditional Chinese medicine Huang Qin. Test results show the advances and reliability of this method.
We perform curve fitting with the principle of least squares, which is based on the analysis of the wavelength detection of spectrum interrogation center. We construct an optimal generic polynomial spectrum fitting model with experimental data. This model is further applied to the curve fitting and simulation of individual central wavelength of acetylene absorption spectrum. Experimental results show that this model can reduce the drift of central wavelength and increase the accuracy of detection.
We present a semifragile nonsubsampled contourlet transform (NSCT) based watermarking algorithm for image authentification. We embed watermark in the singular values (SVs) of the blocks within lowfrequency subbands of NSCT by an adaptive quantization method. Watermark extraction is available only with a key constructed by chaotic signal initial value and quantization parameters. Subbands of individual scale and individual direction all have the same size as those of the original image. This algorithm can improve the tampering localization capability without causing remarkable manmade trace. Experimental results show that this algorithm is robust to JPEG compression but extremely sensitive to malicious operations.
We structurally analyze the color profiles of a device and employ ICM2.0 in Windows to show the real image on a screen. We therefore implement the real consistency of the color of an image between typesetting software and image editing software.
We develop a B/S structure based clinical database management system for Orthopedics of traditional Chinese medicine in view of the status quo of not enough utilization of vast amount of orthopaedics and traumatology literature and clinical data. This system can collect Orthopedics of traditional Chinese medicine related clinical data and some important literature and can effectively analyze, summarize and manage them.
This paper applied variable neighborhood search (VNS) algorithm to the solution ofk-card problem. This paper also defined a new neighborhood structure for the solution space, and improved the algorithm. This increased the search speed of feasible solutions in the neighborhood, and improved the quality of the approximate solutions. This algorithm was compared with the present neighborhood structure based VNS algorithm. Experimental results show its effectiveness for thek-card problem.
We design a fouraxis balance hoist based palletizing robot to satisfy the requirement of logistics automation to robot palletizer. We analyze the kinematic characteristics for the arms of the robot and further obtain an optimal equation of its linkage mechanism. Experimental results show that such a robot can satisfy the requirement of logistics automation.
We implement serial communications between PC and DVP Series PLC in the control system of a completely automatic tester with the internal SerialPort class of C# and .NET based C#. This can increase the flexibility of serial communications program design and the reliability of data transmission through serial ports. Application results show that the transmitted data is accurate and reliable and the program runs stably.
We reduce the blind ends of steel tubes in eddy current fault detection by the automatic control over the gain of a preamplifier and performance improvement of a bandpass filter for the characteristic of strong signal generated at the end of a steel tube. We can detect the steel pit at the 103 mm away from one end of a steel tube of diameter 168 mm and thickness 6 mm.
Let k be a positive integer, and G be a connected trianglefree graph of order n≥2k. We prove that G is a super -λk graph or Kk+1,n-k-1 if each pair of nonadjacent vertices u,v satisfy |N(u)∩N(v)|≥k+1.This result can be applied to the analysis of network reliability.
This paper presents an intrinsic relation between a linear recursive sequences and a polynomial ring,and give out a correspondence between linear recursive sequences and an idea of polynomial ring with one variable.
We performed 12 ns molecular dynamics simulation for estrogen receptor ERα and ERβ and inhibitor 244. We also calculated their binding free energy with the method of MMPBSA. Such energy of inhibitor 244 and receptor ERα is -30.11 kJ/mol, and the energy of inhibitor 244 and receptor ERβ is -33.32 kJ/mol. Electrostatic repulsion between Met421 side chain in of ERα and the inhibitor changes the conformation of Met421 Leu346 and Phe425. This causes bigger binding cavity and further decreases the binding of ERα and the inhibitor. Free energy decomposition calculation indicates the contribution of individual residue to the free energy.
We acquired 33 melanized fungi isolated from 21 specimens of 13 Umbilicariales from China and U.S. ITS nrDNA sequences based analysis indicates that all these fungi belong to 12 Capronia species. Analysis results also show that these fungi may be constant endophytic fungi and some selections exist between them and their host fungi. Different members of the same species of endophytic fungus may colonize in identical lichen for many times. Most of these endophytic fungi are close relatives of freeliving saxicolous fungi, not the extenders of endophytic fungi in lichen.
We investigate pollen morphology of 3 species and 1 variety of Lilium L.with scanning electron microscope (SEM). Results show that these pollen grains are ellipse and monocolpate and that significant distinction exists in size and exine sculpture among different species.
We determined and analyzed protein,total sugar,total acid,pectin, vitamin,amino acids,inorganic salt and mineral elements of 14 species of Chaenomeles speciosa Nakal. The content of their total sugar is in the range of 1.3~3.5 g/100 g; the content of their amino acid is rich and can reach 0.26 g/100 g~0.50 g/100 g; the content of their vitamin C is in the range of 68.8~159.3 mg/100 g, significantly higher than other common fruits. The content of their mineral elements is richhigher kalium and lower sodium. The content of these nutrient components in Jinbao is significantly superior to the other species. Experimental results show the content of nutrient components of Chaenomeles speciosa Nakal is rich and these fruits are worth being explored and utilized, especially for Jinbao.
We obtained a strain dj1-11 from carbendazimcontaminated soil, which had better carbendazim degradation function. It was identified as Rhodococcus erythropolis through physiological and biochemical identification and contrast analysis of 16S rDNA sequences. Experimental results show that trace nitrogen source adding can improve carbendazim degradation. Carbendazim can serve as its unique carbon source and degradation rate can reach 99.15% under the condition of incubation in mineral salt medium of 1000 μg/mL carbendazim , temperature 28℃ and 48h shake bed.It can effectively degrade carbendazim at the pH value of 4~9 and temperature 20~30℃ (optimal degradation temperature).
We screen two groups of composite microbial systems, MC-A1 and MC-N1, with stronger cellulose degrading capabilities from homemade compost heap and several natural fermentation materials by regular regeneration during incubation. MC-A1 is a composite thermophilic aerobic cellulolytic microbial community which is acquired by a subculture technique of shakeflaskfermentation broth, while MC-N1 is another composite microbial community with thermophilic anaerobic cellulolytic capability which is obtained by static cultivation and regular regeneration. It is discovered that the degradation rates of communities MC-A1 and MC-N1 for wheatstraw powder can reach 42% and 38% within 96 h. Their quickest degradation rates occur between 48 h and 96 h, but these rates steeply decline after 96 h.This degradation rate can reach 47% by incubation of MC-A1 through 96 h shakeflaskfermentation and then incubation of MC-N1 through 96 h static cultivation. This demonstrates that these two cellulolytic microbial communities show cooperative function in the course of the degradation of nonnatural cellulose.
We originally propose and design a universal interface for fiber internet of things in view of the issue of difficult fiber sensors fusion in a fiber sensor system in coal mine safety detection. We also construct a cloud connection platform for fiber internet of things with photoelectronic detection, embedded electronics and communications technology. Many optic fiber sensors can be communicated and fused by this platform, so we can construct a coal mine internet of things to improve the level of coal mine safety detection.
Temperature and pressure are two significant reasons directly affecting oil production rate. This paper presents a new Fiber Bragg Grating (FBG) based pressure sensor for oil well application.This sensor breaks through domestic laboratory limitations for the oil well application of a pressure sensor and is quite significant for the increase of oil production rate. Its performance parameters are measurement range of greater than 50 MPa, working temperature of -20~170℃, measurement accuracy of 0.5%FS, and pressure coefficient of up to 41.92 pm/MPa after encapsulation. This sensor has such positives as online, realtime and longterm detection for the temperature and pressure in an oil well, simple structure, high measurement accuracy, intrinsic safety and easy networking.It has been applied to the Tianjin experimental well of China National Offshore Oil Corporation (CNOOC).
Object edge, an important image characteristic, is quite significant in the processing and recognition of an image. Noise and multiple interferences overlaid in the acquisition of an image blur the edge of the image and impair the extraction effect. We therefore present an adaptive median filtering and wavelet decomposition and reconstruction based ant colony algorithm for edge extraction of an image in practice. Vast experiments show that the algorithm can well suppress noise and has better edge extraction effect.
This paper presents an ontology based information retrieval model and further increases the comprehension capability of a system to a natural language document by constructing a domain ontology. This paper also introduces design and use of its three abstract layers. This paper eventually employs a polymerization function to consolidate and assess an inquiry result in order to acquire a wellmatched document with the result.
This paper surveys some biodiesel production techniques. We emphasize the green production technique of biodiesel. It includes heterogeneous catalyzed transesterification, supercritical fluid process, hydrodeoxygenation and its refining process oriented vacuum distillation, molecular distillation, supercritical fluid extractionfractionation, microfiliration membrane separation and ionexchange absorption. We also give some predictions on the development tendencies of biodiesel.
This paper employs the method of dual topology to convert a road segment into a node and an intersection into an edge of a network (topology structure conversion of a real road network) for the importance analysis of the roads in urban road networks.We further employ such parameters as node degrees of complex networks, edge betweenness and network reliability to assess the structure characteristics of an urban road system. We eventually put this evaluation method into practice for the connection reliability analysis of Jinan urban road system under these conditions of deliberate attack and random failure.
This paper presents a high performance controller DSP based inverter, which is a dualloopcontrolled (current and voltage loop controlled) system.Experimental results show that it has such advantages as small volume, high static accuracy and quick dynamic response.
A palletizing robot is a most commonly used robot in an automation workshop.Reasonable deployment scheme and logic control can effectively improve the performance of such a robot,and further improve the production efficiency.This paper addresses the performance optimization approach of 4DOF palletizing robot from optimal path based deployment scheme and average velocity based control.