This paper addresses the existence of positive periodic solutions for a n-species competition system with feedback control by applying the theory of fixed point on cone. It improves and generalizes the results of some relative papers.

Abstract∶This paper employs the theory of fixed point index to investigate the existence of two positive solutions for a class of fourth-order three-point singular boundary value problems with a p-Laplacian operator. The paper also presents some sufficient conditions that at least two positive solutions exist. Our work improves some recently known results.

We define an eventually strongly  L-abundant semigroup. We also prove that a semigroup is an eventually strongly  L-abundant semigroup if and only if it is an inflation of a strongly  L-abundant semigroup.

We employed high performance liquid chromatography (HPLC) to determine the contents of 6-, 8-, and 10-gingerol in seed and tender ginger. The determination conditions were an Inertsil ODS-SP column (250 mm×4.6 mm, 5 μm), a binary eluent under gradient condition and ultraviolet detection at 280 nm wavelength. Experimental results show that the contents of 6-, 8- and 10-gingerol in seed ginger are separatively two times, one and a half times and two times of those in tender ginger.

Microfluidic chip technology is a recently rapidly developing area, which receives attention for its miniaturization, integration and automation. Electrochromatography is an important branch in the area. It has such advantages as high efficiency of conventional capillary electrophoresis and high selectivity of high-performance liquid chromatography. This paper surveys the status quo of manufacturing technology of electrochromatography coloumn and the research advance of polymer-based monoliths column on a microfluidic chip.

We employ plate counting to investigate the impacts of different varieties and farming methods on the rhizosphere soil microorganisms of sweet potato in order to reveal the improvement effect of sweet potato planting on saline and alkaline land. Results show that film, suitable density (4 167 plants/666.67 square meter) and organic fertilizer can improve the quantity of soil microbe to different extent. Results of potassium topdressing demonstrate that foliage spraying phosphoric fertilizer more significantly improve the quantity of rhizosphere soil microorganism than fertilizing potassium. However, potassium fertilized by K₂HPO₄ or KNO₃ does not have significant impacts.

We identify more than 3000 specimens of bryophytes from Shandong province. We discover 1 new family, 10 new genera and 70 new species of bryophytes. The newly reported family is Trachypodaceae. The newly reported genera are Asterella, Kiaeria, Chenia, Epipterygium, Plagiobryum, etc. The newly reported species are Riccardia latifrons, Scapania massalongoi, Calypogeia tosana, Campylopus japonicus, C. schimperi, etc.

This paper surveys research advance of the ingredients of Vitex negundo Linn. The paper also presents its different ingredients and its applications in medicine, insecticidal and antifungal activities.

Lunathyrium shandongense J. X. Li et F. Z. Li, a new species, was originally published in the Bulletin of Botanical Research in 1984 and then was recorded in the Flora of Shandong volumeⅠ. Compared with Lunathyrium pycnosorum(Chirist)Koidz,it has some important characteristics such as erect rhizome, excessively long first pinnulae at the top pinna of basical leaves and twice longer than normal one, little or not grown pinnatipartite, innodular pubescence between freesectionpinnulae, inconsecutive ruga among spore perispore.  We should restore its specieslevel position in plant taxonomy.

We employ phosphorus molybdenumtungsten acid casein method to determine tannin content of two different products from the leaves of Pyrus betulaefolia Bge.. Tannins were extracted to be soaking at room temperature by staying overnight When the color reaction between phosphomolybdium Tungslic acid and phenolic acids was carrying through 90~120 min,absorbency of tolal phenolic acids and unabsorbable phenolic acids was delermined respectively at The wavelength of 760 nm. Tannins content is derived by spectrophotometry difference and standard curve method. Better linear relationship (r=0.997 9) exists in the range of 1~10 μg/mL. We obtain average recovery rate of 98.581% (n=6) and RSD of 0.51%. Tannins average content of unfermented leaves is 0.60%, and tannins is not detected in the leaves of fermentation under this condition.

This paper presents a monitoring method of tower sway amplitude for the security monitoring requirement of a large-scale short wave aerial antenna curtain tower. It employs a fiber grating strain sensor to determine the strain variation on the three stay cables of a tower and then calculates the sway amplitude at the top of the tower. An alarm will be generated when the sway amplitude is greater than the preset safe value. Field tests show that the method can accurately determine the sway amplitude of a tower with an approximate inclination error of 1/24 000. It is therefore sufficient for the requirement of tower safety pre-alarm, so it can replace the regular manual test methods.

Resistive-open defects in a digital circuit will cause a time-delay fault and functional failure of a circuit. We address a fault diagnosis method of resistive-open defects with wavelet analysis and neural network based on the analysis of transient power supply current(IDDT) and principal component analysis. Results show that the method is feasible.

We employ GPRS, ZigBee, GIS and WSN to devise a remote management system for a city manhole for solving its antitheft and positioning issue. The system can perform real-time monitoring for the state of a manhole and its inside environment and can realize its active early warning and alarm. The system can therefore avoid the damage to a manhole cover, its stealing by a person or being damaged by a vehicle.

We devise a water quality detection device with sonoluminescence principle. It includes a reaction chamber, an ultrasound driving power, a transducer and a photoelectric device. Water sample is deposited in a sample container that is connected with a water pump by a pipe. The water sample is pumped into the reaction chamber. The ultrasound power then drives the transducer. Ultrasonic luminescence phenomenon further occurs for the water sample. The light is received by a photomultiplier tube through a detection window and then converted into an electronic signal fed into a computer. We can therefore analyze the quality of the water sample by sonoluminescence principle.

We employ the PCA modules of MCU C8051F120 and software simulation to extend a halfduplex serial port in the design of a fermentation controller. We extend multiple 485 bus in one serial port with the chip MAX485, so solve the problem of serial port deficiency. The extended serial port using PCA modules send or receive data in interruption mode of PCA, so it occupies very little CPU time. It can be used as hardware serial ports besides more interruption times. Multiple extended 485 bus from one serial port can connect multiple lower computers with different protocols and different baud rate to complete the sequence communication. Application flexibility is significantly improved, as compared with single 485 bus.

Metro network is a complex network including stations and lines. We investigate the characteristics of metro network and its evolution with complex network theory. We analyze evolution characteristics of Beijing, Shanghai and Guangzhou metro network by introducing six network characteristic parameters and taking the metro network of the three cities as subjects. We also analyze the congestion phenomenon from the topology perspective based on the statistical results. Our research conclusion will provide a theoretical basis for the future development of urban rail transit.

The paper constructs a customer satisfaction based evaluation index system for urban rail transit service quality. The paper also calculates the weight of evaluation index with the combination of AHP and entropy and introduces the evaluation method of combination of AHP-entropy and multi-level extension into the evaluation for urban rail transit service. We demonstrate the effectiveness of the evaluation index and evaluation method, taking Beijing urban rail transit service as an example. Results show that the approach of AHP-entropy and multi-level extension is applicable to the evaluation of urban rail transit service quality.

We present quantitative parameters for urban ecosystem carrying capacity of Jinan with the theory of city ecosystem carrying capacity and Jinan as a subject from the perspective of maintaining the health of a city ecosystem, its stability and sustainable development. We also construct an urban ecological supporting force model, an urban ecological pressure model and an urban ecological carrying capacity model. We then apply the evaluation index system and model to the evaluation for Jinan city ecosystem carrying capacity from 2004 to 2008, and analyze its changing law. These can provide a scientific basis and theoretical support for sustainable area development and environmental protection.

Pharmaceuticals and personal care products (PPCPs) are important sources of environmental hormones. Even lower concentrations PPCPs may cause worse impact on ecological environment. The paper presents the characteristics of PPCPs in the sludge of sewage treatment plant. The paper surveys the biodegradation effect of PPCPs under aerobic and anaerobic conditions. The paper also analyzes the impact of humic substances on degradation and transformation of PPCPs and proposes the negative profiles to be improved.

We employed different concentrations of dichromate to determine low concentration water from different areas of Shandong Province for the bad precision of the determination of CODCr with low concentration water by GB 11914. This is to analyze the impact of concentration gradient on CODCr. Results indicate that CODCr increases with the increase of dichromate concentration. Determination result is significantly affected by quality of blank water, determination of endpoints, etc. We should completely collect the relative information about water samples when analyzing low concentration water. We should also fully consider system errors, oxidizability and detection range and choose suitable dichromate concentration in order to improve the accuracy of data detection.

We invent a method changing chrome residue into ceramic bone stuff. We initially manufacure bone bisque, and then ceramic bone stuff is formed at 1 200±30 ℃ high temperature and reduction condition by the rotary kiln sintering. The method has such characteristics as simplicity, economics, reliablity, good rigidity and stable structure, so it can be available to concrete recycling. Experiments show that the content of the chromium residue ceramic bone stuff is lower than 0.05 mg·L-1, and that the content of Cr6+ remains unchanged after 5 years.

We performed 100 nanosecond molecular dynamics simulation for the allosteric inhibitor system and active site inhibitor system of HIV-1 protease on NVIDIA CUDA GPU with new developed force field ff12SB. We also calculated the bind free energy of inhibitor TL-3 and HIV-1 protease with MM-PB/GBSA. Exo site binded fragment 2-methylcyclohexanol is favorable for the binding of inhibitor near the site. The bind free energy of inhibitor TL-3 and protease is -85.78 kcal/mol in allosteric inhibitor system and -79.45 kcal/mol in active site inhibitor system. These results are benefit for the deep learning of the dynamics process of HIV-1 PR, which provides important guidelines for the design of new strong inhibitors.

Particle escape curves have the property of chaotics in a RIKEN mesoscopic device, so these curves are the ideal models to investigate fractals and selfsimilar structures. We found selfsimilar structures of the escape curves and defined them by similar ratio through the research on the chaotic escape curves and the scaleless band. We also discovered that the similar ratio is constant in the same scaleless band by the comparisons among different selfsimilar structures. We further acquired the linear relationship between the similar ratios and fractal dimensions of the escape curves. Similar ratio is therefore a means to quantitatively describe the scaleless band and chaotic behaviors. This provides a new method to characterize the chaotic property of a mesoscopic system.

We address the composite vortex superposed by two annulus vortexes with numerical simulation, whose background beam is Gaussian beam. We further present a graphical method to get the position of collinear superposition vortex, by which we can obtain the accurate distribution characteristics of the vortex position. Results show that the singularities and intensity distribution of the composite optical vortices will change with topological charge value and beam waist radius.

Sensitized luminescence of lanthanide ions has been a research focus in the field of organic lanthanide luminescence. Visible-light excitation has such positives as efficient interference reduction of background fluorescence and  damage reduction to biological tissue in the fields of live bioimaging and fluorescent immunoassay, as compared with ultraviolet excitation. Visible-light excitated organic europium complex luminescence has been received attention in the research on the preparation of lanthanide probe. Trivalent europium complex can obtain higher luminescence quantum yield and its characterized emission light is red in the above complexes, so such complexes excite much more research interest in the applications of imaging and immunoassay. This paper reviews the luminescent mechanism, the species of sensitized ligands and luminescence properties of visible-light excitated organic europium complex in recent years.  The paper also analyzes the impacts of different sensitized ligands on the properties of lanthanide ion complexes luminescence, and points out how to synthesize organic europium complexes with excellent luminescence property from the preparation of sensitized ligands

This paper addresses impulsive timedelay synchronization of a system with channel timedelay, where the parameters are uncertain. The system is a chaotic system after certain parameters are given. The paper employs impulsive control to prove its practical stability. Lyapunov function is more general in the process of proof. Simulation results demonstrate the effectiveness of the method.

We address a weakly intraregular ordered Γ-semigroup by fuzzy ideals, fuzzy interior ideals and fuzzy quasiideals in an ordered Γ-semigroup. We also present some of its characterizations, and prove that fuzzy ideals are equivalent to fuzzy interior ideals in a weakly intraregular ordered Γ-semigroup

We generalize the fuzzy congruence on semigroups to Γ-semigroups. We also define fuzzy congruence on  Γ-semigroups, and present the largest fuzzy congruence contained in the fuzzy equivalent relation on Γ-semigroups.

We obtained fulllength nucleic acid sequence of an recombinant immunotoxin of GnRH and PE39KDEL by gene synthesis based on the E. coli codon bias. Factor Xa restriction site was inserted at the C termanol of GnRHPE39KDEL to obtion pET24bGnRHPE39KDEL recombinated plasmid which was then converted into E. coli BL21 (DE3) and BL21 (DE3) plyS. Results show that recombinant immunotoxin exhibits highlevel soluble expression after 0.2 mmol/L IPTG induction at 30 ℃ for 2 h in LB media with 0.2 % glucose till OD600 is acquired at 37 ℃ for about 0.6 h. The purity of fusion protein is above 95% and the protein yield is about 2.6 mg/g after sonication, highspeed centrifugation, HisTrap column purification and desalt. IC-50 detection indicates that the recombinant protein can significantly inhibit the growth of tumor cell strains.

We directly selected medulla mycelium of the lichen to culture the endolichenic fungi from Zhejiang Mt. Qingliang. The ITS nrDNA and 28S nrDNA sequences based growth analysis indicates that 55 fungi belong to Ascomycota. We determined the bacteriostatic activity of secondary metabolite of these 55 endolichenic fungi by the method of paper disc. Results show that 14.55% of the total strains (8 strains) have highly antifungal activity. Maximum diameter of filter parer piece is 3 cm. Our research demonstrates that endolichenic fungi can produce abundant secondary metabolites with antimicrobial activity. They can be served as good resources to screen active substances for many pathogens. They form a potential and rich resource library of antimicrobial compounds.

The paper originally analyzes the number of chromosomes and karyotype of Suaeda salsa (L.) Pall. Results show that its chromosome number is 2n=18, and that its karyotype formula is K(2n)=2x=18=16m+2sm. The karyotype is 1A based on the classification standard of Stebbins.

We addressed the impacts of different drying methods (microwavedrying, hotair drying and shadedrying) on the antioxidant activity and chemical ingredient of honeysuckle. We also assessed the impacts of the three drying methods on the antioxidant activity of honeysuckle and determined the content of total phenolic and total flavonoid with Luminol chemiluminescence, and superoxide anion, hydrogen peroxide and hydroxyl radical scavenging as indices. Experimental results show that honeysuckle has remarkable antioxidant activity. The three different drying methods all exhibit significant impacts on the antioxidant activity and the content of active components. Antioxidant activity of total phenolic and total flavonoid is the strongest, and their content is the highest, 30.40±2.75 mg/g and 61.24±7.62 mg/g under the conditions of microwave drying at 70 ℃ for 10 min. IC-50 of the three indices is 9.44%, 0.029% and 0.12%. Antioxidant activity of total phenolic and total flavonoid is the weakest and their contents are the lowest, 10.22±0.81mg/g and 17.50±2.28 mg/g under the condition of shadedrying for 4 days. IC-50 of the three indices is 11.97%, 0.53% and 0.37% of the original extract concentration.

We constructed the method of isolating 6gingerol, 8gingerol and 6shogaol from dry rhizome of Zingiber officinale Rosc. by silica gel column chromatography and highspeed countercurrent chromatagraphy based on experiments. We extracted the samples of Zingiber officinale Rosc. by ethyl acetate ultrasonic extraction and then coarsely treated them by silica gel column chromatography. We further selected fraction A3 and A4 to be separated by highspeed countercurrent chromatography(HSCCC). The purity of the obtained single ingredient was detected by highperformance liquid chromatography(HPLC) and the structure of the obtained compound was identified by electrospray ionization(ESIMS) and 1HNMR. Results show that the method has such positives as simplicity, rapidity, highpurity products, large amount of preparation and highefficiency separation.

We determined 20 elements in the peel of three strains of T. kirilowii from Changqing with ICPMS, ICPAES and AFS for investigating the distribution characteristics of inorganic elements. We also employed SPSS to analyze their correlations. Analytical results show that twenty inorganic elements including Cu, Zn, Ca, Mg, Mn and Fe all exist in the peel of these stains. However, the contents of these inorganic elements are different. The contents of N, Ca, P and S of strain I are all higher than those of strains II and III except Mg and K. The contents of Mn, Fe, Cu and Se of stain I are higher than those of strains II and III. The contents of B and Sr of stain II are all higher than those of strains I and III. The contents of Zn, Ni and Mo of strain III are all higher than those of strains I and II. 35 pairs of elements are significantly relative, P less than 0.05. 22 pairs of elements are perfectly significantly relative, P less than 0.01. The peel of the three strains all has inorganic elements against cardiovascular diseases. Different germplasms exhibit different impacts on their contents.

We develop a new and highly efficient flat solar bodythe black porcelain composite ceramic solar plate. The solar body is constructed through slip casting with ordinary china clay as raw material, whose surface is sprayed with industrial solid wastes mixed black porcelain mud. The body is formed through firing at 1 200℃ by continuous roller kiln after drying, whose sunlight absorption rate is 0.95. We further present the construction method of ceramic solar plate roof solar heating system. The system shares structure layer, thermal insulation layer, waterproof layer with a building, is integrated with a building and has the same lifetime as a building. Its heat insulation and preservation effect is better than that of ordinary roof. Daily acquired heat of the solar heating system is 8.6 MJ/m², much higher than the national standard 7.0 MJ/m², by the comparison of heat collection efficiency of the system and that of vacuum glass tube water heater. The cost of solar energy is lower than that of conventional energy.

Membrane electrode is a key component of proton exchange membrane fuel cell (PEMFC). This paper reviews recent advances in membrane material, electrode catalyst and gas diffusion layer based on its structure, including Nafion modified membrane, SPA / SPE (sulfonated poly aromatic hydrocarbons) class film, Pt modified catalyst, nonnoblemetal catalyst and GDL diffusion layer. The paper then points out that we should focus the simple improved method of Nafion membrane, development of aromatic hydrocarbon polymer blend membrane, research on Co and N contained electrode catalyst and the development of microporous layer, externally rough and strongly hydrophobic gas diffusion layer in future.

This paper presents a genetic algorithm based method for the creative design of product modeling by the analysis of doublelayer structure coding and binary coding. The method employs doublelayer structure coded genetic algorithm to design modeling, based on which we can produce components with various shapes. The method employs binary coded genetic algorithm to assemble components, based on which we can acquire many different combination schemes. This paper explains its application mode and procedure, taking the design of a kite as an example. The paper verifies its feasibility and practicability with the example.

We design an obstacle detection system with ultrasonic phased array detection and  the microcontroller Cortex-M4 as a processor. Experiments show that the actual sound field strength of the focal area is greater than that of conventional ultrasonic technology and sound energy is more convergent. Its detection distance is from 0.3 to 5.5 m, and measurement accuracy is ±1 cm. The system is therefore effective and satisfactory.

The essentials  that cause traffic congestion, environmental pollution and resource deficiency lie in too rapid vehicle increase which even exceeds traffic carrying capacity. We employ multivariate analysis to analyze the key factors impacting vehicle number. We also construct a time series prediction model for every key factor, and employ multiple regression analysis to predict vehicle number. We further establish a quantitative calculation model to determine urban traffic carrying capacity based on the analysis of key factors of traffic carrying capacity. The number of motor vehicle will exceed Beijing traffic carrying capacity after 2010 based on the calculation of the present data, and the vehicle growth rate will exceed that of traffic carrying capacity. Some relevant specifications therefore must be drawn to restrict the increase in vehicle number.

We performed improved design of urban road intersection, taking the intersection of Yuhua Road and Tangu Street in Shijiazhuang as an example. We initially collected such original data as location, terrain and traffic volume of the intersection and then assessed operating conditions of the intersection traffic volume with Synchro simulation software. We further conducted widening design for crosssection and the intersection with the principle of least disturbance and some relevant intersection design specifications. The total delay time is reduced from 6.1 h to 2.7 h after the design, so intersection traffic congestion is effectively relieved.