Search

Post evaluation is necessary for assess the success degree of a new system. A vessel traffic system project post evaluation method based on cloud model is presented. Firstly, we created the post evaluation index system and weight; Secondly, the expert scored the indexes and then cloud models were achieved; Thirdly, the comprehensive cloud algorithm calculated the result; Finally, the forward cloud generator restore the droplets distribution. The experimental result shows that the method is effective and intuitive.

This paper has presented a bandgap reference circuit with high-order temperature compensation. The compensation technique is achieved by using MOS transistor operating in sub-threshold region for reducing high-order TC of Vbe. The circuit is designed in 0.18¦Ìm CMOS process. Simulation results show that the proposed circuit achieves 4.2 ppm/¡æ with temperature from-55 to 125 ¡æ, which is only a third than that of first-order compensated bandgap reference.

This paper uses the vibration method to diagnose the mechanical state of transformer winding,directed against the fact that the accuracy of the mechanical fault diagnosis in transformer winding is not high. It collects the load test vibration signal of transformer winding in normal and abnormal state, analyzes the vibration signals in different states, and use the vibration frequency and load current matching to judge the winding condition. By setting the different faults to the actual transformer winding of S11-M-500/35 type, it uses the vibration method to do the diagnosis analysis. And the research content is of great significance for the promotion and application of vibration analysis method.

This paper discussed a input buffer structure with replica load, analysed its theory of improving input signal linearity and decreasing distortion, gived some circuit embodiments, one of which was used for a 12-bit 500MSPS SHA-less ADC based on BiCMOS technolgy, Spurious Free Dynamic Range (SFDR) reached above 90dB with a 250MHz input signal.

An analysis of the output impedance of the reference buffer for pipelined ADC is presented is this paper. To achieve high performance of the reference buffer, damping network has added in. The output impedance of buffer amplifier is made equal to the resistance of the damping network. As a result, the effective impedance is made independent of frequency. Spectre simulation with 14-bit 250MSPS pipelined ADC loads, the results show the settling time can be achieved 1.2 ns with 0.0023% precision, and the noise floor per bin is-114dB with the power consumption is 42.3mW. The reference buffer can meet the requirement of 14-bit up to 800MSPS pipelined ADC.

This paper gives a detailed discussion about the gain ripple effect. Using gain equalization to compensate for the gain ripple and improve the working band of the Linearizer-TWTA system is proposed. A Ku-band equalized RF predistortion linearizer for linearizing the distortion effects of travelling wave tube amplifiers (TWTAs) is proposed. Per-tone and two-tone test experimental results show that the equalizer has improved the working band of the predistortion linearizer. A minimum of 4 dB of AM-AM improvement is made within the whole bandwidth of the TWTA, with a 20° phase shift improvement. And the maximum C/IM improvement after equalization is 3.5dB.

Green space system planning is the most direct method to improve urban ecological environment from the perspective of planning. However, traditional way of green space system planning exposes its limitation of paying attention to only urban area, accompanied by the prominent appeal for the enhancement of urban ecological environment and living environment quality. Therefore, the study gives a preliminary discussion on the method of green spaces system planning based on GI theory by introducing the concept and characteristic of GI, and proposes urban-rural integrated green space environment formed by the organic combination of Hubs, Links, and Sites and an urban green space system able to keep the integrality and consecutiveness of natural ecological process, which offers reference for green space system planning of the new era.

The safety evaluation of fishing vessels is a system and uncertain problem. A fishing vessel safety evaluation algorithm based on cloud model was proposed in this paper. Firstly, we established index system and weights by the AHP; Secondly, the cloud generator completed the conversion between qualitative and quantitative indicators; Thirdly, the evaluation cloud model was achieved by the comprehensive cloud algorithm; Finally, the forward cloud generator restored the droplet distribution. Compared with the fuzzy comprehensive evaluation method, the experimental results show that our work is effective and accurate.

The reasonable speed limit would reduce the detrimental impact on the driving safety and traffic jam in Highway expansion project high slope work zone. The study based on the investigation of Liu Nan highway’s traffic capacity, speed, traffic flow and other related index, which researched the vehicles queuing length of the different lane width in expansion project construction zone. The result is that 1/2 lane occupied need limit speed step by step in the warning area, 1/3 lane occupied limit 60km/h and 1/4 lane occupied limit 80km/h.

Different regions in Foggy images have different contrast attenuations. This paper presented a defogging algorithm based on Statistical Region Merging. Firstly, we segmented the image by Mean Shift; Secondly, we merged these divided regions through Statistical Region Merging; Finally, we enhanced the contrast of different regions by Dynamic Segmentation Histogram Equalization contrast enhancement. The experimental results show that our defogging method is more effective than other methods.

Port surveillance videos are degraded seriously in foggy conditions. This paper presented a clearness algorithm based on wavelet packet decomposition. Firstly, we extracted the background image from degraded videos and established the updated model; Secondly, we detected the moving objects as foreground images; Thirdly, we defogged these images based on wavelet packet decomposition; Finally, we fused the background and foreground images together. The experimental results show that our method is more effective.

By used the assumed mode method to simulate the iced transmission line galloping,with three generalized coordinates to represent the iced transmission line galloping. In order to avoid the complicated calculation of vector,used the Lagrange equation to build the nonlinear equations of iced transmission line from the perspective of energy,used the Runge-Kutta numerical calculation to solve the equations of motion and get the iced transmission line’s across-wind,along-wind and the torsional response. Based on Lyapunov stability theory to deduce the critical wind speed of the iced transmission line galloping. And had used a test iced transmission line to verify the feasibility of the numerical solution and the critical wind speed.

Complex structural pattern and behavior of Large-span steel structure result in famous research of health monitoring technology of this kind structure all over the world. Health monitoring to key parts of large-span steel structures during the construction and service process grasp the stress situation, which can ensure the safety of structures. In this paper, health monitoring project of Jinan Olympic Sports Center is introduced and the basis of test points’ layout is elaborated in detail. The result shows that the system designed is running stable, which means it has certain application value to other health monitoring to major engineering.

Composite concrete filled steel tubular (CFST) column is a new type of column having high ductility and high load-bearing capacity. In this paper, the finite element analysis software ABAQUS is used to study the seismic performance of 3D joint of composite CFST column and steel beam. The hysteretic curve and skeleton curve are obtained by changing the strength grade of the steel beam; calculate the energy dissipation ratio of the joint. The results show that the higher the beam’s steel strength the higher ultimate capacity of the joint in the constant axial load. But the full degree of hysteresis curve, energy dissipation and displacement ductility of the space joint decrease.

In this paper, in order to understand fully the development of failure mechanism, bearing capacity and seismic performance of the steel H-beams and composite concrete filled steel tubular (CFST) column joints strengthened by outside strengthening ring, in the space zone the effects of changing the axial compression ratio is investigated. A 3D joint finite element model is built up by finite element software ABAQUS, the elastic-plastic finite element analysis is carried through numerical modeling process. The analysis results showed that low axial compression ratio has a little influence on the bearing capacity; with the increase of axial pressure the bearing capacity will decrease in a high axial compression ratio, moreover the failure pattern of joint changes from beam end to column end. The ductility of the specimens is decreased by raising axial compression ratio.

In this paper, the finite element analysis software ABAQUS is used to study the seismic performance of the joints of rectangular steel tubular columns filled with steel-reinforced concrete and H-shaped steel beam in different beam strengths, which are under the same axial compression ratio of 0.2. By the finite element simulation, we can get the load-displacement curves and skeleton curves from the end of H-shaped steel beam. According to the curves and dates, the seismic performance of the joints is analyzed. The shape of each restoring force curves presents for full square spindle, reflecting that the beam-column structure can effectively absorb the seismic energy; with the enhancement of H-shaped steel beam’s strength, the ultimate bearing capacity of the structure is gradually increasing, however, the stiffness and overall stability of the components become worse by degrees; the change of ductility property about the joints is not obvious, showing good seismic performance.

Complex structural patterns and behaviors promote hot researches of health monitoring technology to large-span steel structures all over the world. Health monitoring to key parts of large-span steel structures during construction and service processes grasp the stress situation, which can ensure the safety of the structure. In this paper, self-developed health monitoring system which use vibrating wire sensor, had been developed to monitor Jinan Grand Theatre Concert Hall. The monitoring results show that there is no significant damage occurred in monitoring positions, which proves a reasonable design and a safe and stable state of the structure. Meanwhile, the self-developed health monitoring system has a high accuracy and good stability and can be widely applied.

This article researches seismic performance of the joint of cellular steel column and steel beam through simulation of the finite element software. With the change of axial force, we can attain the load-displacement hysteretic curves, skeleton curves under the different axial compression ratio, and then analyze their bearing capacity, ductility, energy dissipation and other mechanical properties. Results show that, the decrease of axial compression ratio is helpful to improve the bearing capacity of specimens. The joints of cellular steel column and steel beam have full hysteretic curve, good ductility and seismic performance.

The article researches seismic performance of joints of cellular steel column and steel beam by finite element simulation. Finite element model is established by using the finite element software reasonably. Considering about the hole position and the distance of center of hole as invariant moments, under low cyclic loading we can attain hysteretic curves and skeleton curves etc. which are compared and analyzed in different opening rate by simulated software. The results show that for a certain axial compression ratio (n=0.45) of joints of cellular steel column and beam, the reasonable opening rate can improve the seismic behavior of the joints.

In this paper, the finite element analysis software ABAQUS is used to study the seismic performance of the joint of crisscross concrete-filled steel tube core column-steel beam tested by the pseudo static simulation under low cyclic loading. Then we can get the load-displacement curves of the joint when the axial compressive ratios are 0.2~0.9. By the data analysis can be drawn: the joint of crisscross concrete-filled steel tube core column and steel beam has good ductility and strong plastic deformation capacity, and it can absorb the seismic energy largely; within range of smaller axial compression ratios, the ultimate bearing capacity of the joint has increased with the increasing of axial compression force, however, in range of larger axial compression ratios, the ultimate bearing capacity of the joint has reduced with increasing of the axial compression force; and ductility of the beam-column joint has no obvious decline when the axial force increases.

Active phased array antenna (APAA) can realize multi-object tracking and the beamforming is the key technology. Multi-area array and the implement method of its beamforming are introduced in this paper. Coordinated transformation formula is offered based on engineering practice and beams are synthesized by beamforming algorithm of low sidelobe. Following simulation shows results about beam coverage, those provide theoretical basis for the further research.

This work presents a new method using Kalman filter (KF) and Least Squares Support Vector Machine (LS-SVM) for the inertial navigation systems (INS)/wireless sensors network (WSN) integrated navigation. In this mode, when the ultrasonic-based WSN is working well, LS-SVM is trained for the mapping between the position measured by INS and the corresponding error. Once the ultrasonic-based WSN is outage, the LS-SVM is used to predict the error of position, which is the unavailable measurement vector of the integrated filter when the ultrasonic-based WSN is outage. Thus, the filter in this mode is able to work where there is no data from the ultrasonic devices. The results show that the proposed method is able to provide continuous navigation information when the data of indoor positioning system is outage, and it is effective to reduce the probability of the estimating outliers.

In order to estimate the attitude fast and accurately for the underwater glider using the lower cost and lower power underwater navigation system, this paper designs a new underwater navigation system which is made up of the inertial sensors aided the magnetometer and proposes an improved unscented Kalman filter based on decimation in frequency domain fast Fourier transform (UKF-DF). UKF-DF makes better use of the estimate advantage of UKF in the nonlinear system, and in this basis DIF-FFT is integrated into UKF to increase the speed of calculation. Therefore, the attitude of a glider can be estimated fast and accurately. The real vehicle experiment is done to assess the performance of the proposed UKF-DF algorithm, the experimental results show that the attitude convergence of UKF-DF is better than EKF (extended Kalman filter) and the attitude estimated by UKF-DF is more precise than EKF.

This paper proposed a new algorithm for optical flow-based monocular vision (MV)/ inertial navigation system (INS) integrated navigation. In this mode, a downward-looking camera is used to get the image sequences, which is used to estimate the velocity of the mobile robot by using optical flow algorithm. INS is employed for the yaw variation. In order to evaluate the performance of the proposed method, a real indoor test has done. The result shows that the proposed method has good performance for velocity estimation. It can be applied to the autonomous navigation of mobile robots when the Global Positioning System (GPS) and code wheel is unavailable.

In order to improve the transmission and durability of infrared optical materials, the antireflection characteristics of two dimensional sub-wavelength structures on infrared optical materials were investigated. The results of numerical modeling showed two dimensional sub-wavelength structures can improve the transmission of infrared optical materials over a broad band, especially pyramid structures. Then two dimensional sub-wavelength structures on Zinc sulfide were fabricated with contacting ultraviolet lithography and reactive ion etching, A substantial antireflection effect was obtained over the wavelength band 8~12 μm. To improve the environmental durability of the antireflective sub-wavelength structures, Germanium carbide film was deposited on the two dimensional sub-wavelength structures by reactive RF magnetron sputtering.

In allusion to the grid structure and operation characteristics of the microgrid, in this paper a static voltage stability index for microgrid was deduced based on the existence of the power flow. The index has taken the node voltage into account and is free from the influence of the grids R/X; besides, it has a smaller error for it has no network loss equivalent during its deduction. Then one 13-node microgrid system was established to validate the deduced index, finally the index was used to analyze the influence of distributed sources including the PV, PI, P-Q(V) node types as well as heir locations and capacities on the static voltage stability of microgrid.

For the operating safety of the integrated doubly-fed induction generator (DFIG), this paper proposes an instantaneous power balance control method for the converter. It bases on the optimal rotor current control. A simulation model is built in PSCAD/ EMTDC for analyzing the integration stability of the integrated doubly-fed induction generator system when the power grid voltage drop fault is occurring, and the simulation data verified the correctness and effectiveness of the converter control strategy.

The problem of intermittent generation peaking is highly concerned by the grid operator. To build control model for solving unbalance of peaking is great necessary. In this paper, we propose reserve classification control model which contain constant reserve control model with real-time reserve control model to guide the peaking balance of the grid with intermittent generation. The proposed model associate time-period constant reserve control model with real-time reserve control model to calculate, and use the peaking margin as intermediate variable. Therefore, the model solutions which are the capacity of reserve classification are obtained. The grid operators use the solution to achieve the peaking balance control. The proposed model was examined by real grid operation case, and the results of the case demonstrate the validity of the proposed model.

As an eco-material, the application of recycled aggregate concrete and rapid repair concrete has been deeply researched in recent years. But the application of recycled aggregate concrete with recycled fine aggregate and recycled powder in pavement rapid repair project is seldom. Combing with the related literatures and our own engineering practice, the state-of-the-art report of recycled aggregate concrete and rapid repair concrete is presented, and hope to supply a new way to solve the long-standing issue of waste cement concrete recycling and rapid opening traffic simultaneously.

In this paper, the magnetic force actuator (MFA), a new type of actuator, is applied for long stroke driving with simple structure and high reliability. Ansys and Matlab are adopted to study its static and dynamic characteristics and conduct parameter design. The static simulation concludes static magnetic field, end shield material, structure size of permanent magnet and processing deviation of the actuator, which will impact the characteristics of the actuator in varying degrees. Then the state equations describing the dynamic characteristics of MFA are solved by four-order Runge-kutta method and finite-element method. Interactive interface of the APDL-file and M-file and Macrosoft Visual Basic (VB) is designed to combine Ansys and Matlab to realize optimization design of structure parameters, which simplifies the operation methods and enhances the efficiency. The dynamic simulation results show its good work performance compared with the experiment characteristics of practical 40.5kV SF6 circuit breaker with the spring mechanism.

Based on collecting the regional survey data and prospecting the study region of geothermal geology and geothermal fluid characteristics, evaluate the geothermal energy reserves and the recoverable reserves of geothermal water uses geothermal reserve method and analytical method in Julang Pasture, and evaluates the geothermal fluid quality comprehensively. The above evaluation provides a preliminary basis for sustainable development, utilization and protection of geothermal resources in that region.

Combing the advantages of frequency response method with the advantages of short-circuit impedance method, put forward the sweep frequency short-circuit impedance method. Analyse the windings deformation basing on the mutual difference of short-circuit impedance at different frequencies. The validity of this method is preliminary verified at last.

Zinc base solder wettability was poor, the appropriate flux could significantly improve its wettability. To join different content of the active material in the flux could also improve its corrosion resistance of substrate and wetting effects. This paper studies the effects of BTA corrosion inhibitor on Zn20Sn solder flux physical properties and the spreading performance, the results show that :when the inhibitor BTA content is less than 0.3%, the flux is not sticky.corrosive, no volatile matter content, stability all meet the national standard and spreading performance is good.

In Different surfactants in combination with some inorganic salts were used to improve wetting behaviors of coal dust in this paper. It shows that wetting capability of the coal dust could be improved by addition of surfactant. The improvement due to surfactant use is like: JFC>OP>SDBS. In the mean time, the improvement of the inorganic salts is like: Na2SiO3>Na2SO4>CaCl2>NaCl. The further investigation demonstrates that the more Na2SO4is used, the better wetting of coal dust is bility is.

The mechanism of CH4-CO2 free radical reforming was investigated by DFT and B3LYP methods. The gained results have indicated that the main dehydrogenation of CHx were lost hydroxide atom step by step.The form process of carboxyl was very easy. The decomposition of the carboxyl or the compound included carboxyl were direct decomposition into carbon monoxide at low temperature. The intermediate as ·COOH and CH3COO·were also easy to take place the decomposited into carbon monoxide or CH3O.The hydroxide radical also could combine CH3·,CH2·,CH· into sterols. The decomposition of CHxO(x≠3) is easy and through direct dehydrogenation. The decomposition of methanol were three channels and it can creat H2, C2H6, H2O.

There exists a contradiction between catching time and catching valve for carrier wave catching to micro-dynamic signal in USB/UCB. So a new arithmetic of long point Base 4 FFT has been designed and emulated.

The time resolved partial discharge (TRPD) signals collected by Ultra High Frequency (UHF) sensors of transformer contain important informations of the properties of faults. Wealth of information can be utilized for fault identification by different signal analyzing techniques, such as time domain analysis, frequency domain analysis and the wavelet analysis. An integrated characteristic information fusion system based on the Platt posterior probability model and support vector machine (SVM) one-against-one method is proposed. From the recognition result of the four typical insulation defects, the recognition system shows strong advantages in accuracy and reliability.

Human and computer need interchange knowledge when they tackle a common task collaboratively. But knowledge they use should represented in different forms, so they can work efficiently. Based on Ontology and (Object-Oriented) O-O technology, a knowledge modeling method for human-machine collaboration was proposed to build GIS-based Intelligent Environment for Railway Location (GIERL). Human-machine collaborative knowledge is comprised of Knowledge for Professional and for Computer, both of which are modeled as ontologies and connected to each other by Concept-Relation Dictionary. Knowledge for Computer are represented by O-O, rules of which described by hierarchical model and bi-formal model, and Problem Solving Knowledge as Control Knowledge of Inference Engine. The conceptual model of Knowledge for Professional are represented as simplified Semantic Web, and realized as knowledge forest with Meta-Knowledge by O-O and Microsoft Flow-Document technology when represents it. The proposed method has been successfully used to establish GIERL.

The paper presents the developing trend of telemetry system, summarizes the principle of multi-symbol detection (MSD) and Turbo Product Code (TPC), discuss the combination performance-enhancing technology for PCM-FM telemetry system based on MSD and TPC by analyzing the key parameters in the simulation test. As test result indicated, the performance-enhancing combination technology can improve the performance and signal-to-noise ratio gain of the PCM-FM telemetry system significantly both in theoretical analysis and practical application.

In this paper, L steel reinforced concrete special-shaped columns are established by the finite element analysis software ABAOUS and we simulate and analyze models in blast loads. The main purpose is to study the antiknock property of L steel reinforced concrete special-shaped column in the different thicknesses of steel bone. We change the thickness of steel bone to get the time-displacement curve of L steel reinforced concrete special-shaped columns in blast loads. On the basis of the study we draw the conclusion: the antiknock property of L steel reinforced concrete special-shaped column is better than L reinforced concrete column and with the increasing of the thickness of steel bone the antiknock property of L steel reinforced concrete special-shaped column has enhanced.

Demonstrate the feasibility of the discrete element method application in the stone arch bridge analysis. Put forward simulation and analysis methods of stone arch bridge with fracture and damage. Using UDEC two-dimensional discrete element analysis software to establish arch bridge model, establish a load test state and simulate the overload test, make a force and damage identification via analyzing the main bearing structure arch ring. Discrete element model calculation result has good consistency with the actually measured value. Using the discrete element method can be effectively considered discrete problems of masonry materials, and accurate simulate the discrete characteristics of arch bridge structure materials.

The dynamic optimization of a main drive system in a W-type compressor with friction of joints are studied by ADAMS , a special software for dynamical simulation. First the dynamical simulating model for the system is built considering joint friction in ADAMS . The dynamic response of the crankshaft journal center and dynamic reacting forces of the two rolling bearings are obtained on rated operating condition. Also the average value of the mechanical efficiency of reciprocating compressor was revealed .Then the mathematical model for dynamic optimization is presented, its objective function is mechanical efficiency of reciprocating compressor,and the design variable are the angle of cylinder lines and the rotation speed of crankshaft.The parametric simulating model is constructed in ADAMS to search the optimum solution.The relation between the design variable and objective value is disclosed through 'DOE' ,which is a function module in the design evaluation tools of ADAMS. Numerical results are available for the dynamic design of reciprocating compressor.

Geothermal resource is a very clean source of energy, and its exploration and development has a history of almost one hundred years. In this paper, the mathematical model of multi-physical field on the platform of Comsol Multiphysics software was set up about the flow-solid-Thermal numerical model. During the analysis, rock porosity and permeability of stratum were taken into consideration to study change state of the temperature of export wells and injection wells. Besides, porosity-temperature curve fitting and permeability-temperature curve fitting were made respectively to study the relationship between the stratum temperature and permeability and porosity.

Study four factors - water consumption , water-cement ratio , recycled fine aggregate replacement ratio of recycled coarse aggregate replacement rate - affect the regularity of the load-bearing hollow block compressive strength of recycled concrete by orthogonal test method , the test showed that , water consumption factors affect the compressive strength of recycled concrete block design with than the emphasis on the control of water consumption . Under the test conditions , the optimum mixture ratio of recycled concrete load-bearing block : water consumption of 160 kg / m 3 , the water cement ratio 0.45 , recycled fine aggregate replacement ratio of 30% recycled coarse aggregate replacement ratio of 30% .

The purpose is to implement data sharing and exchange of each application system, establish integrated & technology-supported platform for regional grid dispatching, build data source based on EMS system and platform of visual panoramic model and interoperation centered on CIM, realize visual and unified management of regional grid data and basic resource sharing and exchange, promote construction and development of application integration system and intelligent grid management in Nanchang area.

It is a challenging issue to develop optimal real-time target tracking methods for automobile in the small areas such as urban and indoor environments. In order to get comprehensive navigation information, a target tracking system utilizing ultrasound and machine vision is proposed. In this system, the position, velocity and the yaw in the relative coordinate are used as the state variables, the ultrasound is used to measure the distance between the reference node and the blind node, and the yaw of the automobile is measured by the machine vision. Then, the extended Kalman filter is used to fuse the information measured from local estimators in the proposed method. Simulations show that the position error of the proposed approach is about 0.2m and the velocity error of the proposed approach is about 0.1 m/s.

The development of infrared optical materials is always closely related to the research and exploration of material science. The infrared optical domes bears shock and produces stress when the infrared optical domes mounted on the missile moving at a high speed is shocked by high temperature. According to aerodynamics theory and thermo shock theory, the surge current will be transferred to optical parts through holding up layer and warms the surface of optical parts when infrared optical parts are shocked by high temperature. A compress stress is formed on the hot external surface of optical parts forms and a tension stress is formed on the internal surface or optical parts under the circumstance of the edge of optical parts being fixed. The windows of optical parts become curvature radius of lens with the function of pressure difference which can cause aberration change. The brittle fracture of material will be caused if peak stress is beyond the strength which is permitted for infrared materials. Therefore, limits to design of windows thickness is proposed in this paper.

A mechanism of the dehydrogen-reforming of methane with carbon dioxide over Pt, Rh and Ru under a supercritical condition was investigated by B3LYP/Lanl2dz and MP2 methods. Results show that the reforming reaction divided into six steps under the supercritical state, the rate-determining steps of the reaction over the different transition metals were not the same. Dehydrogenation plays a significant role pin the process of reforming reaction. For Pt, Rh and Ru, the easiest step is the same-step 1. All of the other steps were exothermic reactions. The process of reaction over Pt, Rh and Ru were similar with the reaction over Ni. For Pt, the CO2 Specific activities of four kinds of the transition metals were in the order: Pt>Rh>Ru.

A mechanism of CO2-CH4 reforming over supported transition metal catalysts (platinum, rhodium, ruthenium) under a supercritical condition (304.13K, 72.90atm) was investigated using the B3LYP density functional method and MP2 method. Results obtained show that there are two channels in this reaction. The oxidized material is the most important catalyst in each reaction channel. For Pt, Rh and Ru, the rate-determining step of the reaction is the same - the step of CO2 activation. Because of the large activation energies, the oxide reforming on Rh and Ru catalysts can't proceed under the supercritical condition. For Pt, the CO2 activation reaction proceeds easier than the other two kinds of catalysts. According to the energy calculation results, specific activities of three kinds of the transition metals follow in the order: Pt ＞ Rh ＞ Ru.

Lingchuan National Geopark, a place where has many kinds of geoheritages, unique natural landscape, profound cultural history, graceful ecologic environment. This article differentiated and evaluatedmain tourism resources in the geopark by the detailed investigation and research.Considering the situations of tourism resource development and Special geoheritages resources (karst and Canyon resources)in the geopark, department in charge was suggested to take appropriate method to developtourism resources and protect geoheritage resources.