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Because the output signals of photon detectors are scattered under weak light, the single photon counting method uses pulse discrimination technique and digital counting technique to identify and count weak signals. Compared with analog recording technique, the single photon counting technique has the advantages of high signal-to-noise ratio and good anti drift performance. Discrimination voltage is an important part of single photon counting, which will greatly affect the signal to noise ratio (SNR). The selected process of discrimination voltage is very complicated, especially the number of photomultiplier tube spectral analysis system [1], discrimination voltage selection process more time-consuming. This paper presents a software for automatically searching voltage discrimination. The software can automatically measure the discrimination voltage of a plurality of photomultiplier tubes, greatly improve the efficiency and accuracy of screening voltage selection, and verify the effectiveness of the screening voltage software by calculating the signal-to-noise ratio.

Burgers’ equation on an unbounded domain is an important mathematical model to treat with some external problems of fluid materials. In this paper, we study a FDM of Burgers’ equation using high-order artificial boundary conditions on the unbounded domain. First, the original problem is converted into the heat equation on an unbounded domain by Hopf-Cole transformation. Thus the difficulty of nonlinearity of Burgers’ equation is overcome. Second, high-order artificial boundary conditions are given by using Padé approximation and Laplace transformation. And the conditions confine the heat equation onto a bounded computational domain. Third, we prove the solutions of the resulting heat equation and Burgers’ equation are both stable. Fourth, we establish the FDM for Burgers’ equation on the bounded computational domain. Finally, a numerical example demonstrates the stability, the effectiveness and the second-order convergence of the proposed method.

Climate change and energy crisis has crucial impact on the economic activity and industry, and sustainable development is a solution to our future generation to meet their own need under the impact of climate change and energy crisis. Sustainable development has varies meanings, therefore leads to different responses to this definition. This paper aims to evaluate the industry tendency of sustainable development in Weifang. The evaluation first considers sustainable development situation of Weifang today, and assess the sustainable development industry in that city, and then predicts tendency of future sustainable development, and in the end predicts the customer demand of sustainable development industry. To analysis this, the researchers interview leading expert in the sustainable development industry and review the literature of related field. The paper helps to clarify the sustainable development in the industry of Weifang and help city policy maker to guide the sustainable development.

Spark plasma sintering (SPS) technique was employed to fabricate nanocrystalline aluminum (Al) with the organic-coated Al nanopowders as raw material. A low initial pressure of 1 MPa and a high holding pressure of 300 MPa were used in the investigation. The effect of sintering temperature on the microstructure and the physical properties of the nanocrystalline Al was investigated. The results demonstrated that both the grain size and the thermal diffusivity of the nanocrystalline Al increase with an increase in sintering temperature. However, the resistivity of the nanocrystalline Al deceases with increasing sintering temperature.

Ti-6Al-4V compact bulk was fabricated by Spark plasma sintering (SPS) with initial pressure of 1.7 MPa, holding pressure of 50 MPa, heating rate of 100 °C/min, and holding time of 5 min at different sintering temperature. The fracture morphology of the specimen sintered at different temperatures was observed to investigate the sintering mechanism. It can be concluded that there are four stages in the SPS process: activation and rearrangement of particles, connection of particles, growth of sintering neck and bulk deformation. The high-quality bulk compact can be obtained when the above mentioned four sintering stages proceed in turn and are all fully completed. The compact bulk has the best mechanical properties when the sintering temperature was 1050°C. The relative density of the bulk Ti-6Al-4V exceeds 99.5%. The tensile strength and the elongation of Ti-6Al-4V obtained by SPS process are 901 MPa and 13.9%, respectively.

To study ball bearing motor working principle, an ingenious experiment was self-designed, which results indicated that the nature for driving torque of the ball bearing motor was thermal expansion rather than electromagnetic force as generally considered. Furthermore, the threshold current and cutoff temperature for the ball bearing motor were found in our experiment.

This paper explores effect of rotation speed and media loading on grinding performance of the horizontal stirred mill using the combined method of experiment and simulation on prototype. It selects rotation speed and filling rate to constitute simulation experimental group and conduct the simulation in the EDEM. By studying the effect of rotation speed and medium filling rate respectively on the movement of the medium, the power and the energy utilization,it draw the conclusion of the effect of the rotation speed and medium filling rate on the grinding performance.

For many recycled plastics, materials with different rheological properties and melting points are usually mixed together, and can not be separated. For this situation, the block of die-plate holes can be regarded as an important factor that must be taken into consideration in pelleting process. This paper discusses pelleting process in die-plate and reasons of die hole’s blocking. Finite element simulation is calculated to analyze the relationship between operation factors of pelleting process and blocking situation of die holes. Furthermore, block self-healing is realized by changing the velocity of polymer-melt in die-hole.

Through the Merlot wavelet periodic analysis and Mann-Kendall mutation analysis about the maximum wind speed of 14 weather station in Hexi corridor over the past 41 years,the evolution characteristic of the maximum wind speed can be gotten:the Hexi corridor has about 28-29 years main period and 8-12 years secondary period,presenting sinusoidal curve,and the transformation energy cycled from small to big to small to big;After 1980,there were abrupt changes and decline in Anxi,Jiuquan,Zhangye and Wuwei.The Hexi corridor is in the wind speed environment of same climate conditions,and the inter-annual change feature becomes balanced; but in internal local areas,due to the influence of environment, terrain and urban heat island effect,the secondary period is different,presenting abrupt changes and decreasing tendency in 1980s.

Singular value decomposition (SVD) is an important part of the numerical calculateion.It is widely used in biology, meteorology, quantum mechanics and other fields. It is discovered that the speed of calculation and accuracy has become the two basic questions of singular value decomposition during the construction process. With the era of big data,there are more and more cases of largescale data analysis using SVD. Singular value decomposition was originally an algorithm for computing resources are consumed, if still using the traditional stand-alone mode, will consume a lot of time cost. In order to improve the computing speed and accuracy, the system implement the parallel SVD algorithm which is based on unilateral jacobi method.It is used to analyze large-scale matrix about medicine for finding similarity of medicine efficacy.

Clinical data are inevitably incomplete, and most knowledge discovery algorithms lack the capability to contend with missing data. Flow-graph confers some distinct advantages in data mining and knowledge discovery. However, flow-graph methodology is not able to comprehensively solve the incomplete data problem. This paper proposes a flow-graph network approach for extracting knowledge from incomplete medical data. The concept of incomplete-medical-diagnosis-flow-graph (IMDFG) was defined. To evaluate the diagnosis rules within theIMDFG, the computing method for the certainty factor and coverage factor are presented. Moreover, the application of flow-graph network can be useful for extracting comprehensibility knowledge from the incomplete medical data. In an illustrative medical example, the clinical diagnosis rules are induced and interpreted in accordance to the generated flow graphs.

A new variable structure chamber was designed to plasma reaction with two-stage showerhead, and its flow filed dynamic control equation was analyzed and meshed by ICEM. The simulation research for the meshed models was analyzed by a commercial software-Fluent, by changing various parameters such as mass flow inlet, height, diameter and section of outlet. The result shows that the height and diameter variation for chamber has a little influence on the pressure upon susceptor. However, when the mass flow increases in inlet, the pressure improves, and it also changes as the section variation of outlet.

The tensile strength, elognation and microstructure of alloy are respectively tested and observed after annealing treatment. The results show that the working rate the larger, the initial recrystallization temperature the lesser. The proper middle annealing process of Cu-Ag alloy with 80% deformation is 405°C×5h.

In this paper ,a color printing defect automatic online detection method based on digital image processing technique is proposed. The main idea of this method is comparison of defect product and template and it makes up of following key models. Firstly, multi-scale segmentation is applied to composed image which is overlaid by detecting product and template image. Secondly, an automatic region similarity analysis calculation is taken to segmentation obtained in multi-scale segmentation. The color difference between detecting product and template can be calculated accurately. Thirdly, defect detection results can be obtained according to threshold segmentation. Finally, the characteristics and advantages are approved by experimental analysis and discussion. Algorithm parameters are adjusted and modified to improve the stability and effectiveness. Experimental results approve that color printing defect automatic detection method in this paper has the characteristics of effectiveness and applicability. And experimental results indicate that this method has the advantage of judging the defect types automatically.

This study starts with analysis of interaction mechanism of tire and pavement to analyze the factors influencing anti-skid performance in pavement surface characteristics and confirm pavement characteristics related to anti-slide performance. Besides, this paper further analyzes the effect of surface coating on pavement anti-skid performance. The specific experimental study mainly concentrates on raw material selection and evaluation and the study on the performance of different particle anti-skid pavements. This paper also measures friction coefficient of anti-skid section of the extension line of Beiyuan Avenue within the use for one and a half years. The degradation model is set up to evaluate pavement performance degradation. Further, this paper estimates Jinan the service life of the experimental section of coating-type color anti-skid pavement and carries out benefit analysis and development prospect.

Sea clutter is interference background in radar target processing. It is difficult to detect long-range weak target in sea clutter. Sea clutter signal changes complex, with high intensity. For close signal, radar receiver will overload and reach saturation point. We are interested in the most dynamic range for displaying target echo and fast changing component of clutter. By analyzing spatial and temporal correlation of sea clutter, slow changing component can be minus from sea clutter. The innovation of this paper is to propose a linear prediction error method for sea clutter to increase dynamic range of radar receiver. It prevents overloading and reaching saturation point at close range.

Aiming at uncertainty and disturbance of the excitation system, we designed a kind of precise sliding mode controller with nonlinear disturbance observer that realized disturbance estimation and compensation. In order to obtain better convergence rates, based on the basis of fast terminal sliding mode surface, terminal piecewise sliding mode is adopted. Using the single machine infinite system, we have carried on the static and transient simulation. Simulation results show that control strategy adopted can guarantee system robustness to disturbance and has high control precision

The human skeleton is a mechanical device that people can wear. It put the human intelligence and the robot physical together, relying on human intelligence to control the robot. It is a man-machine system to finish by people's own ability which is unable to complete tasks by robot alone. This paper studies the inherent law and movement mechanics of human body load walking principle. The purpose is to realize the human skeletons wearing comfort and walking stability, and improve the accuracy of the body weight. Analysis of the effect of load on gait parameters provided the necessary theoretical basis for the design of human bones.

In the era of knowledge economy, under the network environment project collaborative knowledge construction has been paid more and more attention. Project team knowledge transfer between form a knowledge network, in line with the basic core in complex network theory goal-directed (edge network structure), has its uniqueness. In this paper, this paper discusses the knowledge network formation, network evolution stage, according to the knowledge sharing, knowledge transfer, knowledge learning and knowledge creation of four phases of the micro mechanism of knowledge collaboration, and points out that the body of knowledge of the cooperative intention, attitude and sense of trust, the body of knowledge of the network structure, location and neighborhood structure, the overall network effect and the types of knowledge, is an important factor affecting the knowledge synergy. Discusses the co-evolution of knowledge network project in cooperation, use the interpretative structural model to construct collaborative knowledge construction process of analogy model.

In this years, the human society has entered information period . many aspects of human life has changed , the traditional teaching system and teaching model are facing the challenge of the transform , so the M-learning has become a new learning style . Nowadays, the Mobile Learning has based on the mobile Intern technology and mobile communication technology . So this stylize is very popular .

Knowledge resources are the key elements of the enterprise core competencies, and knowledge loss is easy to overlook the problems of enterprises, many enterprises have to pay this end expensive price, knowledge loss problem has become an important issue of the impact the survival and development of enterprises (especially in knowledge-intensive enterprises). Knowledge Grid research focus on intelligent information processing, its goal is to eliminate isolated island of information and knowledge, to realize the intelligent sharing of information resources and knowledge resources, avoid knowledge loss. From the research direction of knowledge loss and knowledge grid, this paper analysis knowledge loss based on BP neural network, discusses the open grid services architecture, knowledge grid services architecture, system architecture, in order to provide a reference for related research.

This thesis focuses on some key technologies in WMN, including the QoS routing based on the mufti-rate, the cross-layer channel allocation based on the mufti-rate, the cross-layer channel allocation based on the cognitive technique and the Mesh access point selection based on the study. Along the achievements in main line of joint design cooperation, in which carries out in-depth ideas, there form a number of innovative the related technologies.

In order to forecast the malfunctional state of main power plant on ships through predicting the trend of unsteadily changed thermal performance parameters in main power plant system, this paper established AR model for thermal performance parameters using time series analysis method, by which to predict the change trend analysis of thermal performance parameters, and comparing the predicted values and the measured values. The actual application case of predicting a main engine’s exhaust temperature has been validated by using of the AR model, and results showed that: AR model can accurately predict the change trend of smoke temperature, and the prediction precision is higher, the average relative error was 0.25%.

As the Key Components of a Horizontal Axis Tidal Current Energy(HATCE) Turbine, the Blades will be Affected by the Force of the Fluid when the Turbine is Working, which also Results in a Possible Effect on the Safety and Stability of the Tidal Current Energy Turbine. Thus, both the Structural Performance and Energy-Catching Efficiency of HATCE Turbine should be Paid Equal Attention. in this Study, Basing on the Workbench, the Energy-Catching Efficiency and Structure Performance of the Designed HATCE Turbine with Stainless Steel and Structural Steel at the Different Current Speeds are Comparatively Studied Using Unidirectional FSI Analysis Method. it can be Concluded that the Output Power of the Turbine is Lower at a Low Current Speed but its Energy-Catching Efficiency is Higher and Vise Versa. as a Result of Structure Performance Analysis, the Designed Turbine has Adequate Safetyunder all Loaded Conditions. Thus, the Designed Turbine Models are Available.

A novel operation mode is proposed to enhance the photovoltaic performance of dye-sensitized solar cell (DSSC) by applying an external bias on the back electrode. The measured data shows that the photovoltaic conversion efficiency and open circuit voltage of DSSC are significantly improved by more than 38.8% and 5.8% under the stimulated AM 1.5 sunlight by using the biased operation mode compared to the conventional operation mode without an external bias applied. The improved photovoltaic performance could be attributed to the suppressed back reaction from the recombination between the photoelectrons produced from dyes and the I3- ions in electrolyte under the novel operation mode.

HfAlOx based RRAM devices were fabricated using atomic layer deposition by modulating deposition cycles for HfO2 and Al2O3. The effect of rapid thermal annealing (RTA) on the resistive switching uniformity of HfAlOx based RRAM devices was investigated. Compared to the as-deposited devices, the resistive switching uniformity of HfAlOx based RRAM devices after RTA treatment are remarkably improved. The uniformity improvement of HfAlOx based RRAM after RTA treatment is related to microstructure change in the resistive switching film.

The aim of the work was to analysis effects of biogas residue continuous application on soil fertility improvment. The results showed that biogas residue addtion to peach orchard improved soil quality. Biogas residue application reduced soil bulk density quickly in a short term, improved soil TP, effctive N and available P contents significantly, as well as promoted soil TOC and humus acid accumulations to imoprove soil fertility. The results provide technical support for biogas utilization.

Adopting the integrated TOPSIS intelligent energy optimization control strategy, and compared to conventional single control strategy on energy consumption of greenhouse equipment under closed condition, this paper arrives at the best energy saving optimization control strategy with comprehensive benefits. The result shows that, integrated intelligent optimizing control was obviously more energy saving compared to those did not take optimization control. Specific results as follows: TOPSIS integration strategy with energy saving of 725.39kwh, energy-saving rate of 44.19%.This shows that the proposed integrated intelligent energy optimization control strategy and energy saving effect is remarkable.

Excavated foundation has widely used in the field of transmission line engineering because of its large capacity to resist uplift and moment force. Elastic-plastic numerical model were established by using the finite element software ABAQUS focusing on the difference of bearing characteristics of inclined and vertical excavated foundation. There is very slight difference of axial uplift resistances between the both foundations because almost the same soil mass are mobilized at the same displacement loading. However, failure modes and horizontal resistances of negative, positive and vertical foundations are very different. The larger soil mass along the shaft of negative foundation is mobilized than positive and vertical foundations. The uplift resistances of vertical and negative foundations are about 5% and 25% higher than positive foundation at horizontal displacement of 50mm respectively.

Jilin Provincial Academy of Agricultural Machinery initiated studies in 2000 to develop the methodology for successful application of subsurface drip irrigation (SDI) for corn production on the deep silt loam soils of the northeast plains, China. Irrigation water use for corn can be reduced by 37–52% when using SDI compared with more traditional forms of irrigation in the region. Irrigation frequency has not been a critical issue when SDI is used for corn production on the deep silt loam soils of the region. A dripline spacing of 1.5 m has been found to be most economical for corn grown in 0.76 m spaced rows. Nitrogen fertigation was a very effective management tool with SDI, helping to maximize corn grain yield, while obtaining high efficiencies of nitrogen and water use. The research SDI systems have been utilized since 2000 without replacement or major degradation. SDI systems lasting 10–20 years are cost competitive for corn production with the more traditional forms of irrigation in the northeast plains for certain field sizes.

In order to prolong the lifetime of WSNs, low-duty-cycled scheduling is a widely used strategy. However, there exists high latency with traditional routing algorithms. In this paper, we model the data collection scheme of WSNs to be a delay optimization problem and propose a distributed algorithm based on Network Utility Maximization. The proposed algorithm can distributed find an optimal routing to achieve minimal average end-to-end delay. The simulation results show that our algorithm performs better than the traditional shortest path algorithm on end-to-end delay with less control message.

Differences of physical properties between matrix and fractured region, size of fractured region and production allocation all affect production characteristics and development effect of fractured gas wells. Building a numerical simulation model of fracture network dual porosity, we studied impacts of these factors in contrast of programs of different parameters. Larger stimulated reservoir volume and higher permeability of fracture network result in good well performances but no meaningful increase in gas production when reaching a certain degree. Therefore, optimization suggestions of size and physical properties of stimulated reservoir volume as well as production allocation are proposed.

The throughput of traditional TCP degrades drastically in high speed satellite links, where the characteristics of long round trip time (RTT) and high bit error rate (BER) happen together. Two typical improved algorithms, Hybla and Westwood, are designed to solve the problems of long RTT and high BER respectively. TCP-HW which combines the advantages of Hybla and Westwood is proposed in this paper, on the basis of consideration of both long RTT and high BER. At slow start and congestion avoidance phase, TCP-HW adopts a radical congestion window (cwnd) growth policy to eliminate the low data transmission rate bring by long RTT as Hybla does. At fast retransmit and fast recover phase, TCP-HW updates the cwnd according to the estimated available bandwidth in Westwood to avoid the frequently unnecessary reduction of cwnd due to high BER. There, the cwnd can be kept large enough to achieve high throughput. Simulation results in NS2 indicate that the change of RTT and packet error rate (PER) has little impact on TCP-HW and the bandwidth utilization of TCP-HW can reach more than fifty percent in the 1Gbps GEO satellite link with 500ms RTT and 0.001 PER. In addition, TCP-HW still have good fairness.

Underwater Sensor Network (UWSN) is a powerful technique for aquatic applications. Although the international researches on this topic are quite prosperous, it is still in its early stage of development. UWSN is vulnerable to various kinds of attacks because it is usually deployed in hostile environments. This paper systematically summarizes and analyzes the existing security attacks and defensive mechanisms of the UWSN. We expect it can offer a theoretical reference for the establishment of the UWSN security system.

Applying Multiple-Input Multiple-Output (MIMO) technology in terrestrial wireless networks can obtain large capacity gain. Therefore, MIMO technology is widely applied in satellite communication system, in which orbital positions are increasingly crowded and frequency resources are of shortage. This paper attempts to research on channel capacity in 2×2 dual-polarized MIMO mobile satellite (DMMS) system and discovers that when XPD (Cross Polarization Discrimination) is above zero, the channel capacity increases approximately linearly with the XPD within certain range. Adding Ricean factor K in consideration of its special features,the system’s capacity increases with the Ricean factor K. Simulation results demonstrate that the application of MIMO technology in satellite mobile communication system can improve the channel capacity significantly, providing great support for the development of future satellite MIMO technology.

This paper focuses on the study of ALOHA software (Version 5.4.4), and expects to do some help for the rapid and accurate predetermination of involved areas and the efficient organization and direction of evacuation in different areas by the decision-maker who is in charge of the emergency rescue during accidents caused by hazardous chemicals. It may also have the practical application value by offering technical support for the on-spot commander for the purpose of taking effective measures for the emergency response.

Six degrees of freedom motion platform is an important part of the flight simulator. To study the dynamic characteristics of the simulator, the paper carried a six degree of freedom motion platform dynamics analysis, and proposed fuzzy PID control strategy, and through the ADAMS software to establish a simulation model of six degrees of freedom motion platform, simulation results show that the use of strategy has good control effect for the simulator is designed to provide some reference.

First of all, we investigate adaptive matrix projective synchronization of the chaotic system. Finally, this method is applied to secure communication through improved chaotic masking. The information signal is mixed with the chaotic signal before being transmitted, and is recovered without distortion through the synchronized receiver. Simulation results show that the scheme has a good performance.

An index system for evaluating the demand side management (DSM) on railway temporary power system is established in this thesis, and the part weight and the whole weight of the index system are calculated by the analytic hierarchy process (AHP). The basic theory of fuzzy evaluation is introduced, and the feasibility of applying it to DSM on railway temporary power system is analyzed. Through the establishment of index system, evaluation and comparison to DSM projects can be carried out horizontal and vertical. Then identify gaps and weaknesses, analyze the causes, guide the consciousness of energy conservation and environmental protection, supervised of electricity in an orderly manner, establish DSM long-term management mechanism.

In order to ensure work safety, large cranes generally use two motors together to upgrade the load, so often there is a synchronization error, control accuracy is affected. To address this issue, the paper crane hydraulic lifting system to study proposed control strategy based on fuzzy PID's. The results show that the method used to effectively reduce the synchronization error between the two motors to improve the control precision crane, a certain reference value.

With the computer technology boomingly developing and the internet applications gradually spreading all over the world, more and more requirements of endpoint user acquires all kinds of resources via different security level networks. TCG provides approaches to prevent endpoint device from being ruined. However, more NARs on a single physical platform handle connections to different networks which lead to security problems, due to tightly coupled of NARs. In this paper, a lightweight trusted connect framework based hardware-level virtualization is proposed. And we illustrate core implement with improved KVM.

This paper are based on the background of a low-carbon economy, with China's automobile using new energy as the research object, explores the development of new energy automotive industry under collaborative innovation system, as well as the problems it faced. According to it, this paper put forward rational proposals, which has provided great theoretical value and practical significance for the development of new energy automotive industry in China.

More than 40 prestressed composite space truss models of different dimensions are built with APDL design language, and the span, height, lattice number, prestressed value, section area of the chord, width and height of ribbed beam are chosen as design variables. With selecting total cost as objective function, constraint conditions such as strength, rigidity, stability, section size, prestressed limit and structural deflection are also considered, we conduct optimal design for structures by means of zero order optimization. From the results of regression analysis, the optimal span-to-height ratio, lattice number and empirical formula of optimal prestressed value can be found out for designers’ references.

Base on indoor model experiments of two constant section pipe piles and three variable section pipe piles performed in foundation pit,the load transfer mechanism of two kinds of close-ended pipe piles are studied by comparing load-settlement curves,shaft load distribution behaviors,skin resistance and resistance on pile end.Results show bearing capacity of variable section pipe piles is bigger than constant section pipe piles when settlements on pile top are equal.The bearing vertical capacity, unit volume bearing vertical capacity and availability of material of pipe pile will increase with improvement of average diameter and variable section ratio of variable section pipe piles.To variable section pipe pile, shaft load distribution suffered a sudden drop on position of variable section and shaft load distribution of small diameter pipe piles decrease quickly than constant section pipe piles.Resistance on pile end of variable section pipe piles are bigger than constant section pipe piles and resistance, ratio of resistance on pile end to bearing capacity of variable section pipe piles will increase with improvement of average diameter of variable section pipe pile. Action point of max skin resistance of variable section pipe piles are closer to pile top than constant section pipe piles .Max skin resistance will increase with decline with ratio of variable section pipe pile.If settlements on pile top are equal,force of skin resistance of variable section pipe piles are bigger than constant section pipe piles when the average diameters are same.

The key propose of this paper is to design a IoT(Internet of Thing) based farm environmental monitoring system and to realize the automate management of agriculture and the implementation of precision production. The system consists of three layers which are sensor layer, transmission layer and application layer, respectively. The modular structure is adopted to develop coordinator node and router node which have flexible structures and strong versatility, the node connects with sensors through standard analog interface, on the basis of which, high reliability, flexible Wireless Sensor Network (WSN) is built, the WSN can perceive environment information for greenhouse tomato growth in a real time way and transmit the data to the remote server management system reliably. Field experiments show that WSN is stable, reliable and provides basis for the scientific management of farm.

Low-carbon economy is the driving force for sustainable regional economic development. The logistics industry is the fastest growing industry in recent years. In this paper, for example Beijing, Tianjin and Hebei, analyzes the development of the metropolitan area's logistics industry. In the context of low-carbon economy, the use of wisdom logistics to build a new logistics industry, the integration of resources, to reduce waste, improve efficiency, and protect the environment.

Referring to a project in Tianjin, the paper has described the mechanism of the earth berm, and analyzed the influence on supporting structure from the earth berm using finite element. It was observed that the wider of the earth berm with constant height the smaller of the supporting structure deformation, and the deformation will tend to be stable when width reaches specific value. With constant width, the higher of the earth berm the smaller of the supporting structure deformation. The retaining of the earth berm should be reasonable and safe. Under the premise of the slope stability, the paper suggests that the height of the earth berm should be 2/3 of the excavation depth, and the width should be 1/2 of the excavation depth.

In this paper, temperature field analysis of concrete filled steel tube reinforced concrete columns in fire has been carried on. A finite element model for concrete filled steel tube reinforced concrete columns in fire is developed by ABAQUS. The cross-sectional temperature field distribution regularity of concrete filled steel tube reinforced concrete columns in fire has been obtained. Parameter analysis such as fire duration time and steel ratio on the column section temperature field is conducted, and this provide the reference for the further analysis of concrete filled steel tube reinforced concrete columns.

Through the analysis of superfine deep-hole drilling process, we used the combination of gun drill and BTA deep-hole drilling process for 17-4PH (0Cr17Ni4Cu4Nb) stainless steel deep-hole drilling test. We measured wall thickness point by point, and calculated the conversion of the eccentricity in a deviation axis line. Which fully embodies the advantage of this process for stainless steel 17-4PH, and provides a new method in super hardness material deep-hole drilling field.

Aiming at the situation where the double-threshold detection has been widely used without complete mathematical proof and condition of application, this paper proves its correctness under the circumstance of spectrum sensing, and circulates the condition where this method can work. The proof and simulation show that, comparing with traditional energy detection, this method can increase the probability of detection by 27% to 42% at most when the SNR is between-15dB and-2dB, while the probability of false alarm is increased by less than 2%.