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Polyhedral oligemeric silsesquioxanes epoxy (POSS-EP) was prepared from 3-glycidyloxy-propyl-trimethoxysilane (KH-560) and tetramethylammonium hydroxide (TMAH) by hydrolytic condensation. POSS-EP was characterized using fourier-transformed infrared spectroscopy (FTIR), thermal gravity analysis (TGA) and gel permeation chromatography (GPC). When the mass ratio of KH-560 and 25wt% TMAH was 20:1 and the temperature of hydrolytic condensation was 80°C, T8 was the majority and certain a mount of T10. The temperature of POSS-EP in weight loss 5wt% and the maximum degradation rate was approximately 200°C. The residual weight for POSS-EP at 800°C was 33.5wt%. After the cotton fabric was treated with 5wt% POSS-EP by using toluene as solvent, its carbon residue was improved 60 times than untreated .

Now micro-blog media is growing fast and micro-blog short text has also become a new type of information carrier. User’s sentiment orientation and emotion of the topic or event in a large number of user’s micro-blog, can not only provide decision-making basis in business but also provide support for government's public opinion monitoring. During micro-blog emotion classification, characteristic information is extracted directly influences the classification effect. This paper uses emotional sentences, emotional symbol, emotional word polarity and other emotional information as classification feature, and use NLP&CC Chinese micro-blog sentiment analysis evaluation standard segmentation of emotion in the polarity based emotion. This paper proposed the Chinese micro-blog sentiment classification based on the feature of amorous feeling. Parallel tests suggested that this method has better classification results, and has verified when micro-blog text’s emotional level is higher, the effect of the method is better.

A facile biomimetic method was developed to enhance the interfacial interaction in organic-inorganic hybrid materials. By mimicking mussel adhesive proteins, a monolayer of polydopamine (PD) was constructed on surface of Al (OH)3 particles through a controllable coating pathway. The modified Al (OH)3 (PD-Al (OH)3) was incorporated into an epoxy resin. It is found that the strong interfacial interactions brought by the polydopamine benefits the effective interfacial stress transfer, leading to greatly improved flexural properties of the organic-inorganic hybrid resin.

A nanoSiO2/polyacrylamide (PAM) organic–inorganic nanocomposite system was prepared using acrylamide as the monomer, nanoSiO2 as the modifier, and ammonium persulfate as the initiator. The system was then used to investigate the impact of various factors, including amount of modifier and concentration of monomer, thereby determining the conditions for optimal reaction. Infrared spectroscopy was then used for structural characterization. Measurements using the viscosity method indicated that the viscosity average molecular weight of the product exceeded 1 million. Electron microscopy images showed that a good organic coating layer formed on the surface of the microspheres.

An effective improvement method was put forward caused by the traditional Gaussian mixture model has poor adaptability to illumination mutation. When illumination mutation is detected, improved Frame difference could detect the foreground region and background region, and then adopts a new replacing update methods to the Gaussian distribution with the least weights of Gaussian mixture background models in different regions. The experimental results show that improved method makes Gaussian mixture model can quickly adaptive to the light mutation, and exactly detect the moving object.

Dynamic test method is a more accurate method of indirect nondestructive testing. The dynamic characteristics of the buildings is obtained by dynamic response of high sensitivity under external excitation vibration pickup structure. The test of a reinforced concrete frame shear wall structure of a complex building was carried on as an example, and the evaluation of the overall performance of the structure was made through the test results.

A kind of peptide based Ni (II) complexes (general formula [ZN=C(An)-C(An)=NZ](NiBr2)2, Z=(4-NHR-3,5-C6H2(CH3)2)2CH(4-C6H5), R=dipeptide, An=acenaphthenequinone) has been synthesized. Ethylene oligomerizations were carried out by using those complexes in combination with ethyl aluminium sesquichloride (EAS) and produced olefin . The effects of important parameters such as temperature and EAS concentration. on the catalytic activity and the distribution of resulting oligomer were investigated. under the conditions of employing toluene as solvent, a reaction temperature of 50°C and an ethylene pressure of 1.0 MPa..

This paper puts forward a more efficient fully homomorphic encryption scheme with a view to improving the oversized public key based on the Dijk’s scheme.Encrypted with a cubic form in the public key elements instead of quadratic form by adopting Gentry’s fully homomorphic techonology.The results show that the public key size reduce from to compared to the Coron’s scheme.The security of the proposed scheme is based on both the approximate GCD problem and the sparse-subset sum problem.

A kind of N-((3-chloro-1H-indol-2-yl) methylene)-2,6-diisopropylbenzenamin Ni (II) complex has been synthesized. Ethylene oligomerizations were carried out by using those complexes in combination with methyl aluminoxane (MAO) and produced olefin. The effects of important parameters such as temperature and MAO concentration. on the catalytic activity and the distribution of resulting oligomer were investigated.

Haydite as filler, selecting canna as wetland plant denitrification effect of vertical flow constructed wetland research. In terms of the mechanism of denitrification, in view of the ceramsite adsorption, microbiological nitrification and denitrification reaction, plants absorb test in three aspects and to study the effect of various factors. Adsorption experiment, ceramsite to NH4+_N adsorption reached the maximum at 4 h, adsorption intensity is 0.0045 mg/g, device of NH4+_N in the running 92 days maximum theory is 1296 g. Microbial average intensity of nitration was 0.750 mg.h-1.kg-1. The denitrifying intensity of 1.090 mg.h-1.kg-1. Canna root, stem and leaf nitrogen content were increased by 7.73%, 7.73% and 9.92% per plant cannas average of 1.189 g, nitrogen absorption during the running period of 10 plants absorb about 11.89 g. Vertical flow constructed wetland, the choice of spherical light ceramsite substrate adsorption strength, suitable for packing of wetland. Canna better effect on the absorption of nitrogen, of the three microbes plays a main role for denitrification.

At first, this paper introduce some current tests of secondary circuit in intelligent substation, then, design a performance analysis system of secondary circuit in intelligent substation based on NI platform. This kind of system analyzes analog and digital quantity messages for getting the performance of secondary system by algorithms, so that working personnel can grasp the performance comprehensively. Meanwhile, a prototype is developed to be applied in an unused intelligent substation, and the result is satisfied.

Proxy re-encryption is an efficient solution to ciphertext delegation and distribution, which also enables the sender to carry out fine-grained control on his ciphertext. This paper summarizes the progress on the proxy re-encryption schemes and their practical applications. Universal models for proxy re-encryption and its security are also induced for detailed investigation on different types of PRE schemes.

Periodic mesoporous organosilica film was prepared via sol-gel and spin-coating methods using a 1, 2-bis (triethoxysilyl) ethane (BTEE) and a poly (ethylene oxide)-poly (propylene oxide)-poly (ethylene oxide) triblock copolymer template (P123). Thermal treatment at 350°C for 1h resulted in the formation of ultralow dielectric constant (k) film with a k value of 1.82, a leakage current density of 1.58×10-9 A/cm2 at 0.5MV/cm, Youngs modulus of 6.45 GPa, and hardness of 0.58 GPa. Further, thermal treatment at higher temperature up to 500°C still achieves an ultralow k value smaller than 2.0, similar leakage current characteristics, and enhanced mechanical properties. These indicate that synthesized PMO film has robust thermal stability, and very good potential for the application of next-generation inter-level dielectrics.

he softening and static recrystallization behavior of typical Fe-Mn-Si-Al series TWIP steel between high temperature deformation passes was investigated by two-pass hot compress deformation experiments on Gleeble-3500 thermal simulated test machine. The dynamic model of static recrystallization was built according to the experimental results. The investigation of the effects of deformation temperature, deformation rate and pre-deformation shows that deformation rate is the most effective parameter, and the increase of deformation and pre-deformation can also promote the static recrystallization. The calculated static recrystallization activation energy of TWIP steel is about 147kJ/mol through the dynamic equation built. The results of model predict conform to the experimental results.

With the rapid increase of social requirements on energy, as well as the increasing deterioration of the global environment, energy production becomes one of the most important future challenges for human society. In this context, biomass has become a renewable resource with high potential for energy production [1]. In recent years, the demand for and use of renewable energy has increased globally [. Bio-energy is regarded as one of the key options to mitigate greenhouse gas emissions and substitute fossil fuels, especially obvious in Europe. Over the past 10-15 years, heat and electricity production from biomass increased with some 2% and 9% per year, respectively, biofuel production increased about eight-fold in the same period between 1990 and 2000. Biomass contributed some two-thirds of the total renewable energy production in the European Union (EU) (2000 PJ) or 4% of the total energy supply in 1999 [.

According to different specifications of sand barrier and different parts of dunes, soil hardness of topsoil and different depths of soil were measured, then analyzed the influences of sandbag sand barrier on soil hardness, the results show: The soil hardness of dunes which lay 1m × 1m, 2m × 2m and diamond 3 kinds of specifications sand barrier are significantly higher than the soil hardness of bare dunes (P middle > upper, and the soil hardness of the 3 parts have significantly different (p

Tourism destination is a special area typical of the man-land relationship interaction. Eco-efficiency evaluation of tourism destination is a basis for developing inclusive and sustainable development policies and measures for tourism destination. This paper discusses the progress on tourism eco-efficiency from three angles-concept definition, measure methods and empirical study. Three aspects of deficiency were shown in the present study. One is the research perspective. Most researches on tourism eco-efficiency are from the level that human material production behaviors influence environment, however researches from the level that human consumption behaviors influence environment are inadequate. The other is the research content. The researches mainly focus on the value and impact two aspects, while the measure concerning value and impact is incomplete. The last part is research method. Though, currently some scholars have already applied ecological footprint analysis method, material flow analysis, ecosystem health assessment to the evaluation of regional eco-efficiency research. The methods about the measure of eco-efficiency which include priority structure method, multi-objective programming method, ecological topological method, data envelopment analysis, ecological cost value index are suffering highly controversial, owing to having inherent defects on characterizing natural resource consumption, environmental pollution, ecological service value, non-polluting ecological impacts, human development and so on. Consequently, from the view of input, output and process of logistics, energy flow, currency flow of tourism destinations natural-economic-social-tourism complex system, making eco-efficiency as an entry point, aiming at achieving sustainable development of tourism destination, studying on tourism eco-efficiency, it will be the frontier research area of Tourism Geography.

In this paper, an communication and battery performance evaluation is discussed for a demand response and battery storage coordination algorithm, which provides a new way of microgrid tie-line smoothing service. A battery storage system and a total number of 1000 heat pumps are modeled to demonstrate the algorithm. A temperature priority list (TPL) model is used to describe the behavior of the heat pumps. Besides, a control strategy via a two-way communication networks is implemented to smooth the tie-line fluctuations. Then considering in a no ideal communication environment, the impacts of the unexpected changes of the on/off status of the heat pumps on the simulation results are studied. Meanwhile, the impacts of different numbers of batteries and batteries with different charging rates are also referred. The results show that coordinating the heat pumps and batteries can significantly smooth the fluctuations brought by the integration of the renewable resources such as the wind and solar power. The switching status changes of the heat pumps, the numbers and charging rate of the batteries also have great influence on the proposed smoothing performance.

The nonlinear Hammerstein model was designed. The model was used to compensate the dynamic behavior of an electronic throttle body at different operating conditions. It consisted of a static nonlinear function and a dynamic linear function. The static nonlinear function was used to representing the coulomb friction and limp-home return springs and the dynamic linear function was used to representing dynamic piecewise-linear characteristic. An observer model, known as kalman was used for the on-line throttle position and angular velocity estimation. The control strategy was designed which combined the feed-forward control based on Hammerstein model and feedback control based on proportional-integral-derivative (PID) controller. The control structure has the quick response characteristic of the feed-forward control and disturb compensation characteristic of the feedback control. The experimental results revealed that the dynamic position control delay less than 100ms, the static position error less than 0.5o and the controller satisfied requirement of GDI for precise in-charge control.

For the scene where there is a toxic gas leak, in order to detect the gas quickly and safely and make the effective solutions, the project of monitoring toxic gases in a remote wireless way and the process of the development is proposed in this paper. The device developed in this paper includes several wireless sensor network (WSN) nodes and one hand-held terminal, and the sensor module of WSN node is composed of several chemical gas sensors. The nodes will be sent to the scene by ground robots or unmanned aerial vehicles and make up the WSN monitoring system automatically, to achieve an aim of monitoring the toxic gas in real time. The experiment results show that the device can deal with the emergencies about the leak of toxic gas efficiently. And it has the advantages of low power consumption, high cost performance, self-forming network, anti-interference. Its suitable to monitor the toxic gas in various environments of industrial production and chemical scene of accident and unexpected occasions where there is a leak of toxic gas.

To investigate biomass classification technology, such as rotary classifier, and to select appropriate biomass classifier. Through the change of different feeding rates and rotation speeds of the classifier, the classification efficiency and Newton classification efficiency, specific particle size and uniformity index, the recoveries of coarse and fine powder and energy consumption were measured. The results indicate that feeding rate and rotation speed have an important effect on the classification. When the rotation rate of classifier is 300rpm, the classification efficiency decrease basically, but in 78.96kg/h, it is the maximum. And Newton classification efficiency would decrease at first and then increase, in 88.96kg/h, it is the lowest. When the feed rate are 78.96kg/h and 88.96kg/h, as the rotation speed increases from 50r/min to 150r/min, there is a moderate increase in uniformity coefficient, that means the biomass size distribution becomes narrower. The energy consumption means the pulverizer capacity is larger, the less is the wasted energy. It is a common sense that the larger the mill, the higher the efficiency.

Kapok fiber has a unique large thin-walled hollow structure, lightweight and water repellent oil of excellent features, and is not yet fully exploited the small breed natural fibers. In the development process of the use of kapok fiber, there is a problem of dyeing, finishing, dyeing rate, dyeing and poor. Plasma processing technique is a modification to the fiber surface, non-polluting promising new technologies and has energy efficient. The research kapok fiber after plasma surface modification, found kapok modified staining rate has been significantly improved absorbent; Modified kapok fiber mechanical properties are not changed significantly; While exploring the plasma modified kapok fiber optimum.

Situated on the piedmont tectonic belt of Tarim Basin, well KS-37 encountered large-section evaporite bed at the depth from 5100m to 5400m. Complicated geological conditions and narrow pressure safe density window prevent the cementing plug project to some degree. 2.26g/cm3 forerunner slurry, 2.26g/cm3 saturated saltwater spacer fluid aggravated by micro-manganese and 2.30 g/cm3 intumescence cement slurry, combined with corresponding technical measures have been utilized in the evaporite bed. As a result, cement plug operation has been accomplished successfully so as to meet the engineering requirements of side tracking. It is indicated based on field application that great progress has been made in the adoption of cement slurry of high density as well as corresponding technical measures, which can meet the requirements of plugging cement in evaporite bed in the condition of narrow pressure safe window.

Boron concentrate obtained from paigeite mineral by magnetic separation was treated by using sodium-calcining method. Mass of NaOH, calcination temperature and time that influence the leaching rate of B2O3 was investigated. Phase compositions and B2O3 leaching rate of sodium roasting products were analyzed by X-ray diffraction and chemical analysis. The results showed that the suitable processing parameters were addition of NaOH 10 times by theoretical mass, calcination temperature 600°C, holding time 4h. Under the above conditions, the leaching rate of B2O3 reached 92.94% when the leaching temperature, leaching time and liquid-solid ratio is 99°C, 2h and 10:1, respectively.

Dynamics model of mechanical system and hydraulic system inclued electro-hydraulic proportional valve of Proportional-Valve Hydraulic Power Steering were established.and simulation model of assisted characteristic of PVHPS system was build .Response characteristic of proportional valve bypass flow was analyzed at different speed, and higher of the speed, greater of the flow in the bypass flow is . Steering wheel torque increases gradually as vehicle speed increases at the same wheel angle, and driver's better steering road feeling can be ensured. As wheel steering torque increases, assisted oil pressure increases and higher the speed is , slowly oil pressure increases, and assisted oil pressure increases quickly at low-speed steering condition, and increases slowly at high-speed condition,which meet the requirement of low-speed steering agility and high-speed road feeling.

In anaerobic digestion system, the functional niche of hydrogen-producing acetogens (HPAs) is between acidogenic fermentation bacteria and methanogens. HPAs are quite difficult to be isolated by pure and ampliative cultures due to the obligate anaerobic metabolism property in syntrophic association with methanogenic. In order to enhance the HPAs activities in anaerobic disgestion, the physioecologic and metabolic properties of HPAs under different medium conditions, such as carbon and nitrogen type, influent temperature and pH was investigated in batch cultivation experiments. The result illustrated that under the cultivation temperature of 45°C and pH of 8.0, the butyrate, propionate and benzoate could be utilized by the syntrophic acetogenesis coculture, of which the uptake rate of butyrate was highest. The glucose and sucrose were repulsed however. The metabolic activity of HPAs could be enormously simulated as the mixture of tryptone and yeast was taken as the nitrogen source.

An method for making AlN(aluminum nitride) nanowires by double decomposition, and the effection of additives was described. Future more, the growth mechanism of AlN nanowire synthesis with addictive were analyzed. AlN nanowire were synthesis by he AlCl3 and NaN3 in stainless steel cauldron without solvent and using Mg and Zn as additive. X-ray diffraction (XRD) and scanning electron microscopy (SEM) were used to study characters of the AlN nanowire. It is shown that the process can produce AlN nanowire with mean diameters ranging from 50 to 100 nm at 450°C. The additive has effective facilitated on the synthesis of aluminum nitride nanowires, can improve the properties of aluminum nitride nanowire, minish the average diameter of aluminum nitride nanowires.

In this paper, we used the sol-gel method to get the green luminescent material precursors and prepared the Sr5(PO4)3Cl: Tb3+, Tm3+ green luminescent material by microwave-assisted sintering. Then we have studied the effects of different microwave time and power changes to samples structure and morphology, the effects of different halogen changes to samples structure and morphology, and the effects of different doping concentration and Halogen changing to luminescent properties. Using the X-ray diffractometer we study the samples crystal structure and survey the morphology and size by the scanning electron microscopy. Through the luminescent spectroscopy study the effects of Halogen changing. The results shows that: the optimum reaction conditions are microwave-assisted sinter at 800W for 60 min. Using F, Cl , Br three halogen prepared a halogen phosphate luminescent material, optimal luminous intensity are chlorine phosphate.

In this paper we have successfully prepared the red luminescent material of La0.01Y1.99Sn2O7: Eu3+, Dy3+ by the method of hydrothermal and sintering. The phase structure, surface morphology and fluorescence properties were investigated by the scanning electronic microscopy (SEM), X-ray diffraction (XRD), and photoluminescence (PL). The EDS showed that the luminescent material is La0.01Y1.99Sn2O7: Eu3+, Dy3+. The SEM micrographs showed uniform particles with good crystallinity of luminescent material after sintering. PL spectrum showed the increasing of Eu3+ has great benefit for the increase of the luminous intensity of luminous materials. The optimal doping amount of Eu3+ ion and Dy3+ is 1:3 (nEu: nDy).

This paper investigates the impact of additives and cooling way on the metallization rate of reduction product by the experiment of the coal-based direct reduction of vanadium titanomagnetite ; The promotion of direct reduction product metallization by additive species, additive content, reduction time and cooling way was studied and the optimal condition was found; when used 3% CaF2 as additive reduced for 0.5h and used water quenching to cool down the product, finally got the product which metallization got 93.80% and 42.93% higher than the null sample.

Strip shape defects, especially the crown problem, once appeared in the production of hot-rolled strip steel in SG Company. The macroscopic characteristic is the thickness difference occurred between the center and edge cross section of hot-rolled plate. Morphological characteristics and forming reasons can be got by analyzing roll wear. Research shows that the main reason for the formation of crown is excessive attrition of work roll in later period, which leading to smaller roll shape. Therefore, shape defects have been effectively controlled after introducing CVC roll contour technology to optimize roll shape. Quality qualified rate of strip shape of hot-rolled strip steel is more than 99.6% percent, and it has been successfully put into application of hot rolling mill.

To obtain fine-grained products of ultra-deep drawing hot rolled steel sheets,effect of deformation,deformation temperature,deformation rate on microstructure refinement were investigated through multi-pass hot-rolling finish-rolling process test.Experimental results show that gain size decreased with the increase of total deformation and the first-pass deformation in a certain finish rolling temperature range.Gain size decreased with the decrease of deformation temperature and the increase of deformation rate.Through the industrial test rolling,grain size of hot rolled steel sheets was up to 8.5.

Vibration in turning processing is associated with free vibration, forced vibration and self-excited vibration, the composition and machine tool, tool and workpiece process system dynamic characteristic.A detailed analysis of the main types of vibration in turning and the causes, and put forward from the aspects of cutting tool, fixture, cutting process, reduce or eliminate vibration measures.

The aerogel-type wood is prepared under crafts of dissolution of wood materials by 1 - propenyl -3- methylimidazolium ionic liquid and followed supercritical drying process. And then, cellulose fibers as supporting frame with incomplete three-dimensional cross-linked network are reformed after dissolution of aerogel-based timber. The reformed cellulose fibers possess microstructure that similar with light wood, stable chemical and physical properties, dry density of 0.221 g/cm3 and porosity over 87%. Additionally, the novel wood-based material achieved by green chemical treatment can continue to fix and store carbon absorbed during the growth stage of trees, and will also play a certain significance in areas of low-carbon and environmental protection.

Oligomerization of 1-butylene catalyzed by Bis(tetramethylcyclopentadienyl) Zirconium dichloride/MAO was investigated in detail under different conditions including reaction temperature, Al/Zr molar ratios, co-catalysts, concentration of catalyst to determine the optimal reaction conditions. The work shown that oligomer of 1-butylene in this catalyst system featured a kind of base oil of lubricant with pour point of -22 °C, kinematic viscosity of 2999 mm2/s at 40 °C and 2530 mm2/s at 100 °C, viscosity index of 258 and a moderate average molecular weight. In addition, the oligomer obtained was characterized by 1H-NMR and IR.

Reforming of methane is an important route to produce sygas. In this paper, recent progresses of noble metals (Rh, Ru, Ir, Pt, Pd) catalysts for methane reforming in material application engineering is reviewed. The discussion mainly focuses on catalytic performance of noble metal catalysts or noble metal promoted Ni catalysts in methane reforming reaction. Effects of noble metals, supports and preparation methods on the catalytic activity, selectivity, coke deposition and stability of catalysts have been briefly summarized. In conclusion, Rh as active component, Pd as material for membrane reactor, Pt or Rh as promoters for Ni catalysts, all gave high CH4 conversion, improving catalytic performance.

Carbon dioxide reforming of methane (CDR) can convert two greenhouse gases, methane can carbon dioxide, into useful syngas. Nickel-based catalysts have been extensively investigated due to their high activity and low cost. However, coke formation over Ni catalyst is serious and leads to rapid deactivation of the catalyst. Coke resistant Ni catalyst for CDR reaction is desired. In this paper, recent progresses in the design and preparation of coke resistant Ni catalysts supported on solid solutions, zeolite, perovskites and perovskite type oxides, hexaaluminates or substituted hexaaluminates, pyrochlore, montmorillonites, and hydrotalcites for CDR were summarized. The progresses in the use of promoters, in the effect of supporting materials and in the preparation methods have been discussed. The future development of coke resistant Ni catalysts for these processes is briefly addressed.

Effects of continuous annealing process on microstructure and properties of Si based cold-rolled TRIP Steel were studied. The results show that the TRIP effect is more obvious on the condition of 800°C with 120s annealing process and 400°C with 520s aging treatment than others progress. The yield strength of the tested steel is 405MPa, tensile strength is 670MPa, elongation is 32% and strain hardening exponent is 0.230. The microstructures are ferrite, bainite and retained austenite and the volume fraction of retained austenite for the tested steel is 9.20%.

In the active field of vascular graft research, in situ vascular tissue engineering is a novel concept. This approach aims to use biodegradable synthetic materials. After implantation, the synthetic material progressively degrades and should be replaced by autologous cells. Poly (ε-caprolactone) (PCL) is often used for vascular graft because of its good mechanical strength and its biocompatibility. It is easily processed into micro and nano-fibers by electrospinning to form a porous, cell-friendly scaffold. However, the degradation time of polycaprolactone is too long to match the tissue regeneration time. In this study, poly (ε-caprolactone) /poly (trimethylene carbonate) (PTMC) blend scaffold materials have been prepared for biodegradable vascular graft using an electrospinning process. Because the degradation time of PTMC is shorter than PCL in vivo. The morphological characters of PCL/PTMC blend scaffold materials were investigated by scanning electron microscope (SEM). The molecular components and some physical characteristics of the blend scaffold materials were tested by FT-IR and DSC analysis.

Degradation of phenol was studied in the presence of Fenton Reagent. The initial concentrations of C2O42, H2O2 , Fe2 + and pH value on the reaction were investigated. The optimum conditions to degrade phenol from water were determined when initial phenol concentration was 500mg/L, the concentration of Na2C2O4, H2O2 and Fe2 + were 0mmol/L, 300mg/L and 60mg/ L respectively, and pH value was 3. Under the optimum conditions, phenol degradation and mineralization rates could reach 80% and 50%, respectively when the degrade time lasted 10 min.Reference to other literature of sodium oxalate to join can effectively improve the utilization of the ultraviolet and visible light,thus enhancing the effect of high concentrations of phenol wastewater removal, but this experiment reflects the high C2O42- will play an inhibitory effect .

The MoO3/H-ZSM5 catalysts for CH4 dehydroaromatization are prepared by physically mixing MoO3 and HZSM-5 and calcining the mixtures under different atmospheres at different temperatures. Transmission infrared spectra have been used to characterize the acidic properties of the MoO3/HZSM-5 catalysts. On the base of observations obtained the effects of the calicination temperature and environment were discussed on the migration of Mo and its dispersion over HZSM-5.

In this article, cholesterol 3-hemisuccinate (CHS) was synthesized through the functionalization of the end group of liquid crystal monomer cholesterol with succinic anhydride. Hydrophobic cholesterol modified low molecular weight chitosan (CS-CH) was synthesized by 1-Ethyl-3-(3-dimethylaminopropyl) carbodiimide (EDC)-mediated coupling reaction. Chemical structure, crystalline morphology, and thermal properties of the biological material were characterized by Fourier transform infrared spectroscopy (FTIR), differential scanning calorimetric (DSC), and polarized light microscopy (POM). The results of POM showed that CHS was a kind of crystalline material with liquid crystal property of cholesterol. DSC showed that the melting point and the crystalline temperature of CHS were 188 °C and 145 °C respectively. DSC also showed that CS-CH was a kind of thermoplastic biological material. The max melting temperature decreased from 120 °C to 110 °C with increasing the weight ratio of EDC/CHS to chitosan.

Using GIS and such models as dynamic degree, analyzed the land-use change in Qingdao according to the statistics of land-use data from 2000 to 2010 years and based on these, the author selects eight natural and socio-economic indexes, and takes districts as the study unit to calculate the driving force indexes with the fuzzy comprehensive evaluation method, and makes the spatial-division thematic maps of the driving forces which cause the land-use change in this region base on GIS. The results show that in Qingdao the land-use types which have the largest change rate is residential area and mining sites, followed by the unused land, water and cultivated land, and the garden plot is the smallest. There is a decreasing of cultivated land and unused land while other types have increased; because of a large base number, cultivated land reduces most among all land-use types. There exists a big spatial difference among these driving forces for land-use change. According the driving force indexes we divided them into four regions.

Different organics have different effects on the power generation of microbial fuel cell. A double-chamber Microbial Fuel Cell (MFC) was constructed to investigate organic matter degradation and power generation. Experiments were conducted using an initial phenol concentration of 500mg/L with different glucose concentrations (500 , 250 , and 100mg/L) as the MFC fuel . Results showed that maximum voltages decreased with the decrease of concentration of glucose and the maximum voltage was 434 mV. The cycle time were 170 , 146 ,141h respectively. Correspondingly , the maximal area power densities were 10.23 mw/m2,5.02mw/m2,3.15 mw/m2. phenol and COD removal rate reached 28%-33.3% and 31.1%-54.74% respectively after one cycle. However, maximum voltage was 201 mV when using 500 mg/L phenol as sole fuel. The results indicated that phenol could be used in the MFC for generating power while at the same time effectively accomplishing biodegradation. The MFC technology may provide a new method to offset operating costs, making advanced remediation measures for difficult to degrade organic materials more affordable for practical applications.

The rheological stress behavior and microstructure change of high silicon nickel-copper alloy NCu30-4-2-1 during high-temperature compression were studied with a Gleeble-1500 thermal simulation tester. Based on the results, extrusion tests were carried out and a suitable extrusion temperature and extrusion rate range were determined. At these extrusion parameters, the success rate can be significantly improved; in addition, the extrusion bars have superior properties, such as superior strength, hardness, wearing resistance, high-temperature resistance, corrosion resistance, bonding resistance, dimensional stability and machinability.

A theoretical analysis for the effect mechanism of elliptic vibration assistance on the cutting of brittle materials is presented in this paper. The crack propagation in the chip formation zone in cutting of brittle materials is examined based on an analysis of the geometry and forces in the cutting region. The cutting model shows that the actual undeformed chip thickness is much decreased with elliptic vibration assistance, and the instantaneous rake angle of the cutting tool edge is also in a larger negative value than those in conventional cutting. These two conditions can ensure the compressive stress is much larger than the shear stress during the cutting process. Then the stress intensify factor is suppressed effectively and the shielding effect on the growth of pre-existing flaws is strengthened in the chip formation zone. The removal of brittle material tends to be in ductile mode without fracture. The characteristic examination of cutting force shows that the ratio of thrust force to cutting force with elliptic vibration is increased compared to that of conventional cutting. This can validate that the larger compressive stress can be generated in the chip formation zone with elliptic vibration assistance. The transition depth to brittle machining of silicon carbide with/without elliptic vibration assistance further supports the presented theory.

Retained austenite of Q&P (Quenching and Partitioning) processed 0.2C-1.51Si-1.84Mn steel heated in intercritical region and full austenite region are investigated. The results show that the maximum volume fraction of retained austenite heated in intercritical and full austenite region is 13.39% and 5.23% respectively. Carbon partitioning completed within 10 s for both heating modes. The microstructure after full austenitization consisted of martensite laths and thin, inter-lath retained austenite film. Austenite blocks is observed as well after partial austenitization.The distribution of retained austenite is related to the amount of grain boundaries by EBSD techniques.

2MK-1760 is a grinding machine used in large scale optical lens manufacturing. To meet the manufacturing requirements, the block thin film hydrostatic guide rail is applied. In this paper, the structure of block thin film hydrostatic guide rail is proposed. In order to get the thickness and the stiffness, design calculation is performed. Experiments are carried out to verify that the feasibility and the validity of this technique.

The B4C/BN nanocomposites were fabricated by hot-pressing process in this research. The B4C/BN nanocomposite powders were fabricated by chemical reaction and heat treatment process. The B4C/BN nanocomposites sintered bulks were fabricated by hot-pressing process at 1850oC for 1h under the pressure of 30MPa. In this research, the phase composition, microstructure, mechanical property and machinability of the B4C/BN nanocomposites fabricated by hot-pressing process were investigated. The XRD patterns results showed that there existed the B4C phase and h-BN phase in hot-pressed B4C/BN composites. The microstructure of the B4C/BN nanocomposites was investigated by SEM and TEM. The SEM micrographs showed that the B4C/BN nanocomposites bulks exhibited the homogenous and compact microstructure, and the h-BN particles were homogenously distributed in the B4C matrix. The TEM micrographs showed that there existed the weak interface between the B4C matrix grains and h-BN particles, as well as the microcracks within the laminate structured h-BN particles. The mechanical property of the B4C/BN nanocomposites decreased gradually with the increase of h-BN content. The B4C/BN nanocomposites exhibited the high mechanical property. The machinability of B4C/BN nanocomposites increased gradually with the increase of h-BN content, the drilling rates of the B4C/BN nanocomposites increased gradually with the increase of h-BN content.

In order to study the damage capabilities of multiple hulls structure under underwater explosion, the damage mechanism of contact blasting and noncontact blasting on target is analyzed, and the formula of shock wave in water goes through multiple hulls structure is put forward. Using armor plate and aluminum plate、copper plate、rubber plate as models respectively, numerical simulation is done by LS-DYNA, the stress distribution and displacement of multiple hulls structure under underwater contact blasting are got. Lastly, test research on damage capabilities of multiple hulls structure under underwater explosion is finished. The result shows that the anti-explosion capabilities of multiple hulls will improve greatly when underwater ship adopted this kind of structure.