Abstract:针对自然气候作用下的草地式屋顶绿化形式,提出采用屋顶绿化隔热效果实测与屋顶热传导计算分析相结合的方法确定绿化层等效热阻,并在重庆选择通风屋顶有绿化层和无绿化层的实例进行了连续5个月的夏季隔热效果现场实测,结果表明:气温越高、太阳辐射越强,屋顶绿化层的隔热效果越好.实测数据的理论分析得到屋顶绿化层的等效热阻为0.56 m2·K/ W.

Abstract:The performance of heat transfer of fin-tube with circular hole is better than fin-tube without hole if there is no frost,but what is the situation if under the frost condition.Tthe comparison study on performance of heat transfer and refrigeration is carriedout under the frost condition for the heat exchanger with three kinds of fins: circular and half circular hole,circular hole,plane form.The experiment process is finished through the refrigeration system of icebox.In the course of experiment,the influence of frost process to the diameter of circular hole;is analyzed The real refrigeration amount,heat transfer coefficient and real refrigeration coefficient of the three kinds of fins are compared;compare the effect of energy saving of enforced fins is given.The fin efficiency is calculated method and make out the real convection coefficient to disclose the situation of heat transfer of fins is lnade out.Results: compared with plane form fin,the following results are for fin-tube with circular hole: average heat transfer coefficient rise 11.53%,convection coefficient rises 18.84%,real refrigeration coefficient rises 6.83%,virtual refrigeration amount rises 6.02%,electricity saving is 6.39%.Fin-tube with circular hole is the best form for the three kinds of fins.

Abstract:In order to analyze the reason why the Spiral Up-flow Reactor system has excellent removal effect of COD, N and P, the authors use PHOENICS, a computational fluid dynamics program, to investigate the hydraulic characteristics and flow model of the anaerobic part of Spiral uP-flow reactor. The result shows that the fluid in the reactor unit flowed upward by the spiral way, and that flow pattern was combined by plug flow and complete-mix flow, and that the percentage of plug flow was about sixty-five percent. Spiral Up-flow Reactor units the Characteristics of PFR and CSTR, which makes it work well.

Abstract:In order to use FEM for engineer to anlysis structures by inputing only the designing parameters, the parametrical finite element software of a framed structure is developed, which has the functions of automatically modeling, adding constraints and loads, showing the results by inputing the changeable parameters. The validity of the software is proved by actual example.

Abstract:Present main method of organic wastewater treatment are physico- chemical method, biochemical method and combination method, but there are many problems need to be resolved, such as organic matter can not be treated thoroughly, fee is high, and operation is complicated. Cavitation jets is a efficient and simple new technology on organic wastewater treatment. It use local high temperature and high pressure produced bubbles collapse to degrade organic matter, and it is better in capacity usage ratio than ultrasonic cavitation. Principle of eavitating jets is giuen, then discussed mechanism of organic wastewater treatment by cavitating jets from free radical reaction, direct thermal decomposition and supereritieal water oxidation, and influence of nozzle stricture is analyzed, jet cavitation number, pumping pressure, confining pressure and physieoehemieal property of organic wastewater on cavitation effect.

Abstract:在完全混合工艺条件下对农贸市场的固体废弃物进行厌氧消化,分析消化过程中pH值、VFA(挥发性脂肪酸)、COD(化学需氧量)和产气量等随时间的变化情况,研究不同投加量的痕量金属Fe、Co、Ni对农贸市场固体废弃物厌氧消化的促进作用.结果表明,在投加痕量金属离子以后,农贸市场固体废弃物厌氧消化的气体产量提高了11.2%～25.4%,甲烷含量从52%提高到57.5%,COD的去除率从33.8%提高到44.1%.其中, Fe、Co、Ni的最佳投加量为1 mg·L-1·d-1、0.1 mg·L-1·d-1、0.2 mg·L-1·d-1.这对运用到城市有机垃圾处理的实践上有着重要的意义.

Abstract:The damage rate of asphalt pavement for the fatigue performance cracking is studied with axial loading by the relationshi Pof surface cueved index with Falling Weight Deflection basin, bottom pulling strain of asphalt surface and aumbers of axial loading. The predicting result of standard axial loading and more-classified loading is very different, so as its increasing rate with the time going. It fits real circumstance to predict the fatigue character of asphalt pavement according to more-classified loading and could be an effective measurement for predicting fatigue life of asphalt pavement ruder axial loading.

Abstract:The dynamic finite element method is used to analyzes the influence on dynamic characteristic of the slope by soft soil layer. The parameters which influencing the earthquake response of the slope, including the depth, the thickness, the obliquity of soft soil layer are analyzed. The influence of soft soil layer is obvious, which must be thought over in the analysis of slope stability. The thicker the soft soil layer is, the more obvious the filter and the amplitude effect is. The deeper the soft soil layer is, the more obvious the filter effect is. The filter effect of the obliquity of the soft soil layer to dynamic time history is not obvious.

Abstract:The design idea and the spot experimental scheme of the particle improved roadbed are analysed in detail and deformed law with time of the particle improved roadbed in the cycle of freezing and thawing. The results indicate that the deformation of the particle improved roadbed presents the corresponding frost - heave deformation with the cycle of freezing and thawing. As compared with the ventilated embankment, the particle improved roadbed can, to some extent, shorten the freezing period and ease the frost-heave deformation.

Abstract:This text solves the basic and important frequency estimate problem in communication by synergetic neural network. Basing frequency estimate in satellite communication, concretely studies the frequency estimate about BPSK signal. When the large Doppler frequency is partitioned several smaller area, each order parameter stands for each area. Once get the winner of the order parameters, the smaller frequency is confirmed. The approximation of the adjoint vectors simplify the complexity of arithmetic, but the system error is caused. This method has rapid capture speed, and smaller cost by analyzing and simulation.

Abstract:The Rake receiver based on digital matched filter(DMF) is studied extensively in order to investigate the performance of the PN code acquisition.By using the state transition diagram,the authors derive the analytic expressions of the mean acquisition time of the Rake receiver based on DMF over frequency-selective channel.Numerical analysis is also given.It is shown that the proposed Rake receiver based on DMF can accelerate the process of PN code acquisition.Because there are many resolved multipath components over frequency-selective channel,the detection probability of Rake receiver is larger than the conventional receiver.If more fingers of Rake receiver are available,then the mean acquisition time is longer and the threshold of detector can be set more widely.

Abstract:Existing mobile satellite communication ground stations mostly achieve satellite tracking with laser gyro.But such stations are not only expensive but also ponderous for installation in moving vehicles,and they can only track geostationary satellite.In order to solve these problems,a tracking scheme using grads tracking method is proposed.With this scheme,not only the expensive laser gyro can be eliminated from the system,but also non-geostationary satellite can be tracked.A tracking scheme based on GRAD-DBF(grads-digital beam forming)are presented.The tracking system can eliminate both the laser gyro and the mech-electronic rotating pedestal and servo system,at the same time it has the ability of tracking multiple non-geostationary satellites.Simulation programs and results of the tracking scheme are given by the software Mathcad.

Abstract:高速突发通信系统要求同步时间尽可能短,通过对一种数据辅助式快速相位捕获算法的分析,提出一种π/4-DQPSK调制信号的载波同步方案.仿真表明,当信噪比不小于8 dB时,该相位捕获算法仅需10个左右码元符号就能快速捕获载波相位.通过-π/4相位旋转运算,将π/4-DQPSK变换成DQPSK信号解调判决,能带来4 dB左右的解调增益,并可以将常用的QPSK载波跟踪环应用于π/4-DQPSK通信系统,硬件实现简单,便于系统的数字化.

Abstract:This thesis mainly introduces a certain kind of real kernel based on TMS320 DSP- DSP/BIOS. There is an expatiation of the DSP/BIOS startup sequence and the design of a video - tracking system based on the characteristic of DSP/BIOS structure. The system is designed and analyzed by the UML technique. By means of scheduling and communicating between one task and another, managing and sending message and managing the muhithread by time-slicer in the process of video-tracking, the video-tracking system can be achieved reasonably. It is proved that the system work stably , the design and the resource are assigned aright and reasonably when the system satisfy the condition of real-time in practice.

Abstract:Pulse Position Modulation is quite suitable for UWB. Existing methods for MPPM decoding are based on harddecision. As the information of the received signal has been deeply used by the soft decode technology, demodulation can be realized more perfectly. The soft decode technology of pulse position modulation was proposed. Formulas for soft-decision computaion have educed. Theoretic analysis and simulation results show that the proposed method achieves excellent performance than the hard decoding method, and that it is fit for UWB.

Abstract:The paper construct the specimen of multi-dimensional space based on the definition of clustering, calculate the generator control sensitive to load and the Eulerian distance, partition the power system by the shortest distance method of clustering analysis. After the range of area num-ber is determined, the optimal area number and its validity is decided by Shannon function of entropy and Sugeno-Yasukaw rule. A case of IEEE 39-bus system is presented to verify the method.

Abstract:Many factors affect the propagation of ultra high frequency(UHF) signals caused by partial discharge(PD) on the waveforms and energy of signals in transformer.To investigate the relationshi Pof factors and UHF signals,simulation model of transformer for PD study are established.UHF signals in simulation model of transformer caused by PD are calculated using finite difference time domain method.By means of amplitude and cumulative energy plot of simulation signals,and combing the measured result,the following factors:distance between PD source and detection position,different metallic conductor position around detection position and iron core and winding are researched,which contribute to comprehend the propagation characteristic of UHF signals and detect UHF signals accurately.

Abstract:This paper puts forward an improved fast-LADT arithmetic in application of electrocardiogram(ECG) compression.The arithmetic has much less mathematical operation and much easier to be implemented in hardware.With the artificial and experimental verification,it turns to be that the arithmetic keeps rather high compress ratio,has the advantages of small distortion and has the nicer results in real tine.The hardware system of ECG data compression is designed,implements the improved fast-LADT arithmetic,the experiment of ECG data compression also has been carried out,and the experiment results prove the validity of the arithmetic.

Abstract:Basing on Fuzzy reasoning technology, this paper introduces the work flow of Gas water heater, and the trait of papilionaceous valve. It also describes the designing process of Fuzzy controller, its theory and the method of making parameter. The experiment results show that this temperature control system has better characteristics such as high- precision, good dynamic performance, excellent control effect, and so on. The design shows its validity and practicability.

Abstract:Bomsster is a key load-bearing part of railway lorry bogie.Because of its inherent defects casting-steel bomsster could not meet the demands of the heavy load,acceleration and security for lorry.So forging process is proposed to form it.The forming performance of forging-steel bomsster is analyzed.A forging technology is presented which realizes two forging-steel bomsster parts formed in one die.With the plastic forming simulation software DEFORM-3D,the simulation and optimization of the forming process of forging bomsster has been taken based on 3D rigid visco-plastic FEM theory.Optimized scheme has been used to direct the pilot product.The results of product's testing and application suggest that the new forging technology is feasible and the performance of the product is credibility and stabilization.The factory has realized large scale production of a series of forging-steel bomsster.Remarkable benefits of both economy and society have been achieved.

Abstract:The authors reveal the certain secretive attribute that quality meta data has,quality meta data secretive to the customer and enterprise's different function and the different expectation,introduce the Dublin core resources set concept,define quality meta data by 6 essential factor constitution method,and distinguish application example that constitute of the standard 6 essential factors.They propose application method and the data flow in view of quality meta data secretive attribute,divide the quality meta data into 3 big types,namely defects meta data,manufacture meta data and function meta data with the premise of the secretive attribute being respected,plan the quality meta data sharing principle and the data transmission flow.

Abstract:The aerodynamic characteristic of wind turbine is calculated by applying the Blade Element Momentum(BEM) theory.Also finite element mode analysis is done for the tower and the rotor.Then the multi-dynamic model of the wind turbine is built in Adams.Also the drive chain is calculated by applying state space method and programmed in Matlab/ Simulink.With that the combined simulation of vibration characteristics is carried out on the base of MATLAB/Simulink and ADAMS,in which the transmission effects and aero-elasticity coupling is fully considered.The results show that the method is able to simulate the vibration characteristic almost the same as software Bladed,which is well-known for analyzing performance and loads for the design and certification of wind turbines.

Abstract:Sodium dodecyl sulfate(SDS) is often used to reinforce the fluorescence of some materials,which need to know the fluorescence from SDS.A steady fluorescence spectrometer was used to analyze the SDS solution with different concentrations.The fluorescence spectra covers longer wavelength scope in ultraviolet light region.The position of the first fluorescence peak ranges from 290 nm to 300 nm with red shift with increase of concentration and fixes at 300 nm as reaching critical micelle concentration.Hereafter,bimodality appears at 300 nm and 330 nm.The first fluorescence peak should derive from the excited oxygen atom between carbon and sulfur.The excited oxygen atom,bonding with sulfur,should generate the peak at 330 nm is traversed.At the same time,fluorescence lifetime of various concentrations SDS.Fitting routine is applied to decay curve and calculates average fluorescence lifetime.The average fluorescence lifetime of SDS becomes long while concentration increasing,and the lifetime at 330 nm is longer than that at 300 nm.

Abstract:Synthesis of W powder by oxide reduction method and fabrication of WC powder by carbonization of W powder are investigated, using violet and blue tungsten oxides as the raw materials, respectively, for the preparation of excellent high grade WC powder. Microstructure and properties of the two raw materials and the obtained W powders and WC powders are studied. The results show that violet tungsten is a suitable raw material for synthesizing uhrafine W powder using the conventional method. The W and WC powders produced from the violet tungsten oxide have better physical properties than those produced from blue tungsten oxide.

Abstract:Based on characters of Artificial Neural Network(ANN) such as non-liner mapping,self-learning,the ANN model was set up to predict the relationship between effective factors and performance of metal-packed evaporative air conditioning system.In order to reflect the performance of the predictive model,experimental data were used to test and verify the model.The outcome of the ANN model is in good agreement with experimental data and relative difference is within 6 percent.So it is feasible to predict the performance of metal-packed evaporative air conditioning system.

Abstract:To discuss the effect about yield of synthetic D,L-lactide with potassium dihyrogen phosphate(PDP) diluents.The optimization process of synthetic D,L-lactide was selected by contrast experiments,optimization experiments and selective experiments of PD Pdiluents quantity,then D,L-lactide produced was analyzed by qualitative analysis and quantitative analysis.The yield of D,L-lactide was improved from 25.65% to about 40.00% when PD Pdiluents that was the most effective factor to affect yield was used from 4%to 6%,however,the rudimental PD Pcontent was only 0.012% and the content of D,L-lactide was above 99.40%.The yield of D,L-lactide was improved effectively with PD Pdiluents,and the D,L-lactide,which structure wasnot changed,could be polymerized into PLA and other polymers for enough content.

Abstract:Studies were given to the induction and growth of callus of Aloe vera L.var.chinensis(Haw.) Berg when the young stem was applied as explant.MS was taken as basic medium,added with various concentrations of auxins(IAA,IBA,NAA and 2,4-D),cytokinins(6-BA,KT and Zeatin) and the different combinations of these plant growth regulators.Results showed that the callus is barely induced by cytokinin alone,and the callus induction rates have significant difference when different concentrations of auxin and different combinations of auxin with cytokinin are used on the MS medium.In order to inhibit callus browning during culturing,various concentrations of vitamin C or active carbon are added into four combinations of auxin and cytokinin respectively,which can induce callus most effectively.The result showsd that vitamin C can alleviate callus browning more effectively than the active carbon.The most efficient medium for induction and growth of callus of Aloe vera L.var.chinensis(Haw.) Berg was MS+2.0 mg/L 6-BA+0.5 mg/L 2,4-D+10 mg/ L vitamin C,with which the callus induction rate can reach to 91.4% and callus grow vigorously.

Abstract:超图H的全着色是指同时给图中的顶点和超边进行着色,使相关联或相邻的元素间着不同的颜色,满足这一条件的最少色数就称为全色数,记为χT(H).超图的全着色又可以分成弱全着色和强全着色两种情况.本篇文章主要讨论超图中星形图S(v)的弱全着色和强全着色,并给出相应的弱全色数和强全色数,χWT(S(v))=Δ 1,χST(S(v))=M 1,以及有关全色数计数的相关结论.

Abstract:For the inequality constrained nonlinear programming problem, the antnors propose a new lower order penalty function, which combines the classical l1 penalty function and the lower order exact penalty function introduced in thoy some papers, and then illustrate that it has the merits of the two penalty functions. In additional, we propose a solution method for solving the inequality constrained nonlinear programming problem and prove its global convergence.

Abstract:By means of symbol operation of Matlab and the convergent condition of the linear muhistp method formula, the authors attained the well posed convergent formulas directly for all linear 2-step methods. Some convergent formulas are gotten after screening and the fraction coefficients, errors coefficients, orders and intervals of absolute stability are calculated. Then figure of region of absolute stability of the absolute stability formula is drawn by means of root locus method. The performance of those formulas simply is analyzed. One new A - stable formula of linear 2-step methods of order 2 is derived and proved.

Abstract:Based on the principles of operational risk measurement provided by Basel II,the paper discusses the problem of operational risk correlations among different business lines / risk types.The correlation coefficients between the aggregate losses among different business lines / risk types are calculated.Copula arithmetic is put forward to compute correlation coefficients matrix of aggregate losses.Besides,the result is used to calculate the capital requirement of operational risk.

Abstract:The flowing sequence has important effect to the flow ste Pdistance and the period of non-rhythm flowing construction,algorithmic research of ordering and step distance calculation are always difficult point of non-rhythm flowing construction optimizes studying.An optimization model of non-rhythm flow process is founded,and a common method for confirming the length of flow step was put forward.In order to find the solution of the optimization model conveniently,the optimization problem is transformed to shortest path problem skillfully.A dynamic programming algorithm is given to make the construction project period as shorter as possible,to reduce cost and improve economic efficiency.

Abstract:Four main warning models including FR, STV, KLR, and DCSD are used to study and construct the warning system of financial crises, and these models having some particular require to data makes it difficult to apply and insufficiency of forecasting ability. Using proportional hazard model brought forward by Cox and Oakes, the paper constructs an early-warning model of financial crises, and demonstrates 13 variables one -year before financial crises. The verifying of this model deems it good to warn the financial crises.

Abstract:The problem on performance of foreign direct investment is the heart of matters, which are further expanding foreign direct investment in China and strengthen international competitive ability of Chinese enterprises. The empirical study on macro performance shows that foreign direct investment in China has made no difference to economic growth and export promotion, both long term and shot term; for a long term, it has no remarkable effect on foreign exchange reserve, but remarkable and negative effect in a short term. It has no any effect on domestic investment in long or short term. There is no balance relation in long term and no cause and effect relation either between foreign direct investment and FDI inflow, or between foreign direct investment and total factor productivity. Foreign direct investment in China has no remarkable effect on macro performance.

Abstract:There are a lot of influencing factors of land price. Method of t-test of regression analysis model can be used to conduct the analysis of significance of influencing factor of land price. In the case of small sample or indefinite error distribution, there is a problem of unlikelihood of statistical referrer. So that, introduce Bootstrap method in the model to increase precision of estimated variance of parameters and reliability of statistical referrer of significance of influencing factor. Take an empirical analysis based on the data of land deal of Chongqing. The result indicates that it is very efficient to solve such problem by Bootstrap method.

Abstract:The conception of virtual logistics and virtual logistics enterprise are introduced,and the importance of information technology in virtual logistics organization is indicated.Then the four layer structure of the support system of virtual logistics enterprise is propaed,which are information collection technical,information share technical,information disposal technical and the theory and methods of information management.The five-layer construction of information system of virtual logistics enterprises is built.This paper can be of instructive significance to the building of the virtual logistics enterprise's information platform.