摘要：T he accuracy of economic evaluation on equipment demonstration projects directly affects the selection of development schemes and the amount of the investment .By analyzing the influencing fac-tors of equipment economy ,this paper established the evaluation index system and comprehensive e-valuation model of equipment economy using the BP neural network .Experimental results are presen-ted to show the efficiency ,accuracy and impersonality of the method .%武器装备论证方案经济性评价的准确性直接影响到研制方案的选择和经费投入的多寡。通过分析装备经济性的主要影响因素，建立了装备经济性综合评价指标体系，利用BP神经网络的非线性处理能力，构建了基于BP神经网络的装备经济性综合评价模型。计算实例表明，运用BP神经网络进行装备经济性评价具有高效、准确和客观等特点。
摘要：某弹性安装的柴油发电机组运转时受到了冲击作用，测试了其加速度响应。实测信号是自身运转振动和冲击响应的综合。采用小波分解重构和小波阈值降噪方法分离冲击响应，结果表明冲击信号主要由2部分构成：（1）低频衰减正弦信号，是由底座冲击经过隔振器后传递到柴油机的响应；（2）频率成分复杂的信号，是限位器造成的冲击。计算了限位器冲击信号的冲击响应谱。%A diesel power generating set with vibration isolator and retainer is subjected to shock load-ing under operational condition .Acceleration of diesel engine bracket is measured .Measured signal is complex ,which is composed of operation vibration ,base shock response .Shock response is separated from it using wavelet reconstruction method and wavelet soft threshold de-noising method .Shock re-sponse is composed of low frequency vibration of isolator ,middle frequency vibration caused by retain-er impacting .Shock response spectrum of shock response caused by retainer impacting is calculated , supplying reference for retainer shock investigation .
摘要：The damage of crane metal structure generally appears in the weld .Crack is one of the most harmful and common damage .Adopt the impedance method and use ANSYS to do harmonic response analysis to steel plate with weld and use the RMSD index method to make study of the weld crack damage recognition and location recognition .The result of simulation indicates that the piezoelectric admittance spectrum is sensitive to the depth of crack and the distance between crack and PZT .The result presents certain regularity .The impedance method can be used to analyze the damage level and the location recognition of crack .%起重机金属结构的损伤一般出现在焊缝处，裂纹是损伤中危害最大和最普遍的一种。应用压电阻抗法并借助ANSYS仿真软件对带焊缝钢板进行谐响应分析，采用RMSD指数法研究了基于PZ T传感器的焊缝裂纹损伤程度和定位方法识别。仿真结果表明，压电导纳频谱曲线对裂纹深度和裂纹与PZ T的偏移距离很敏感，呈现出一定的规律性。压电阻抗法可以用于对焊缝裂纹损伤程度和裂纹位置识别的分析。
摘要：In order to comprehensively analyze the cost and benefit of bus-only lane on the w hole life-cycle ,in view of the characteristics of bus-only lane ,the four phases of bus-only lane from the beginning of whole life-cycle to its end are analyzed according to the w hole life-cycle theory ,the components of the cost and benefit of bus-only lane on the whole life-cycle are discussed .In consideration of the external cost and time value ,the calculation methods for external cost as well as benefit are improved ,and the mathematical models of whole life-cycle cost and benefit for bus-only lane are built .A bus-only lane is put forward as an example to calculate its cost and benefit on the whole life-cycle .Analysis result shows that the proposed calculation method for the cost and benefit of bus-only lane is applicable .%针对公交专用道的特点，从全寿命周期理论的角度，分析了公交专用道从寿命开始到结束的4个阶段，探讨了公交专用道全寿命周期成本、效益的构成。基于对外部成本和时间价值的考虑，重点对公交专用道外部成本和运营阶段效益的量化方法进行了完善，建立了公交专用道全寿命周期成本分析模型与效益分析模型。以某条公交专用道为例，测算了其在整个寿命周期内的成本、效益。结果表明，该成本效益分析方法是适用的。
摘要：提出一种运用优化理论，利用柴油机主要性能参数，如最高爆发压力、平均指示压力、压缩终点压力等，计算其示功图以及放热率的方法。该方法以最高爆发压力、平均指示压力、压缩终点压力与实测值最接近为目标函数，建立多目标优化计算模型，借助Isight优化平台，采用改进的非支配解排序的多目标进化算法（NSGA II），优选双韦伯函数中的6个经验参数，利用优选出的结果进行柴油机工作过程计算，从而得出示功图。计算实例表明，采用上述方法计算出的示功图与实测的示功图基本吻合，减少了选取经验参数的盲目性。%The present work proposed a method of determining indicator diagrams of diesel engines by performance parameters ,such as engine power and cylinder peak pressure .NSGA II provided by Isight software is employed to derive the optimal solution of empirical parameters of dual-Vibe func-tion in a multi-objective optimization model ,in w hich the peak pressure ,indicated mean pressure and compression pressure are closest to the measured ones serve as the objective functions w hile the empir-ical parameters of dual-Vibe combustion law as variables .Case study indicates that the result based on the proposed method is in accordance with the experimental ones ,reducing the blindness of selected empirical parameters in dual-Vibe function .
摘要：The paper introduced the theories of modal analysis ,built the geometry model of motorcycle frame ,then set with loads and boundary conditions according to the actual situation .Using FEA soft-ware to make the modal analysis in free state and calculate the stiffness of the model in the correspond-ing loads conditions ,and considering the frame’s mode shape and natural frequencies and stiffness , optimization solution was carried out in the same way . The experimental model analysis results showed that the improved structure is effective compared with the original finite element model .%介绍了模态分析的理论基础，建立了某三轮摩托车车架的几何模型，并根据实际情况设定相应的载荷与约束条件，运用有限元分析软件对处于自由状态下的结构进行模态分析、载荷作用下的结构进行刚度分析，综合考虑振型、频率及刚度等分析结果，对车架结构提出优化改进方案，并通过模态试验法验证了结构改进的有效性。
摘要：Owing to structure changeability of the traffic network in the period just after earthquake happening ,evacuation routes generated by the traditional shortest path algorithm can hardly satisfy the requirements of safety ,passability ,capacity constrained and contingency .Based on the Capacity Constrained Route Planner (CCRP) ,a new algorithm for earthquake evacuation route planning aiming at solving the above problem was proposed .The characteristics of which included the following as-pects :(1 ) penalty function was introduced to improve traffic safety and passability of evacuation routes;(2) sudden traffic congestion point ,as virtual evacuation origin ,was brought into dynamic route planning process to quickly solve the unexpected traffic congestion .Experiments show that the proposed algorithm can assign traffic flow into the lower-risk and better-passability routes under the condition of satisfying the capacity constrained ,improve the contingency ability for sudden traffic con-gestion ,and can meet the needs of evacuation route planning for earthquake .%重大地震条件下，交通网络具有明显的结构变动性，传统最短路算法生成的疏散路径难以满足其在疏散安全性、可通行性、通行能力约束和应变性的要求。为了解决这一问题，在具有通行能力约束的路径规划（CCRP）算法基础上，考虑了上述有关要求，提出了一种地震疏散路径规划算法。该算法的特色在于：（1）引入惩罚函数以满足应急疏散路径对安全性和可通行性方面的要求；（2）将突发交通拥堵点作为虚拟疏散原点纳入到动态路径规划过程，以增加对突发交通拥堵的快速疏散能力。实证表明，所提出的算法可将疏散交通流分配到危险性较低、可通行性较好的路径上，并满足路径的通行能力约束，而且对突发交通拥堵具有必要的应变能力，能较好地满足地震疏散路径规划的需要。
摘要：This article adopts the method of simulated accelerated test and studies the regularity of cor-rosion of reinforcement in concrete in chlorine salt environment .It detects the corrosion current densi-ty and electrode potential quantitative indicators of the concrete reinforcing steel bar in chlorine salt environment and builds the quantitative model of the corrosion time and the amount of reinforcement corrosion with the advanced of electrochemical test methods .This article detects the weightlessness rate of the corrosion of reinforcement with the physical way and reveals the mechanism and the charac-teristics of the corrosion of steel bar with the microstructure and the component characteristics of rein-forcement corrosion layer using electron microscopy detected .T he research results prove that rein-forcement corrosion rate has increased by an average of 4 -5 times under chloride environment and weight loss ratio has increased by 15% compared with that under no -chloride environment .The re-sults also show that ,due to chlorine’s effect ,partial and uneven corrosion rust layer appears on sur-face of the reinforcement ,which will be the direct cause of inducing accelerating corrosion of rein-forcement at the later stage .%采用模拟加速试验的方法，研究了氯盐环境下混凝土内部钢筋的锈蚀规律。运用先进的电化学测试手段，检测了混凝土内部钢筋在氯盐环境下的自锈蚀电流密度及电极电位量化指标，建立了锈蚀时间与钢筋锈蚀量的定量模型。用物理方式检测了氯盐环境下锈蚀钢筋的失重率，结合扫描电镜检测到的钢筋锈蚀层的微观结构及成分特点，揭示了钢筋的锈蚀机理及锈蚀特征。研究结果表明：钢筋在氯离子环境下腐蚀速率平均增加4～5倍，失重率比没有氯离子环境下提高了15％。由于氯离子的作用导致钢筋表面出现了局部不均匀的锈蚀层，是钢筋后期锈蚀急剧加速的直接诱因。
摘要：Fatigue curve crack growth behaviors of Cr-Mo steel in hydrogen eroding environment have been studied comparatively accurately in this article .Fatigue curve crack grow th characteristics with different stress ratios have been worked over .Coefficients transformation rule of fatigue curve crack grow th formula have been summed up .Essential theoretical models and calculating datas have been provided for life span evaluation and security assessing of shipping & ocean engineering and petroleum& chemical plant equipment and pressure vessel dependability design ,accordingly .%文中较精确地研究了在氢腐蚀环境中铬钼钢疲劳弯曲裂纹扩展行为。重点考察了在不同应力比情况下的氢腐蚀疲劳弯曲裂纹扩展特性，并总结出相应疲劳弯曲裂纹扩展公式中系数的变化规律。从而为船舶与海洋工程和石油化工设备的寿命评估、安全评定以及压力容器的可靠性设计提供必要的理论模型和计算数据。
摘要：介绍了粘滞阻尼器的力学性能和减振原理，并以一座自锚式悬索桥的抗振设计为实例，阐述了阻尼器参数及布置位置的选择，从理论计算上对比了该桥安装粘滞阻尼器前和安装粘滞阻尼器后的地震响应，从结果分析比较中说明了该自锚式悬索桥在多个地震波时程下，粘滞阻尼器都能有效的消耗地震能量，大幅减小了桥梁结构地震下的内力和位移，起到了很好的减振效果。%T his paper mainly introduces the mechanical properties and damping absorption principle of viscous damper .Taking the seismic design of a self-anchored suspension bridge as an example ,the pa-per discusses damper parameters and selection of layout position .The theoretical calculation shows the contrast of seismic response of the bridge before and after the installation of viscous damper .The analyses of the results show that viscous damper can effectively consume seismic energy and greatly reduce internal force and displacement of bridge structures ,w hen the self-anchored suspension bridge is in multiple seismic time history .Therefore ,it plays a very good damping effect .This research re-sults will be beneficial to engineering project applications .
摘要：针对左转机动车流量大、行人斜向过街需求高的 T 形交叉口，结合交叉口车流、行人流的交通特性，提出了一种左转机动车和斜向行人协同过街的思路，在交叉口内设置斜行斑马线和Z字形人行横道，以降低交叉口整体延误及人-机冲突；并建立了基于人-机冲突的交叉口平均延误模型，该模型能实现交叉口交通冲突、交通延误的合理计算；最后，选取武汉市一个典型的 T形交叉口对该方法进行了验证，利用所建模型和VISSIM仿真两种方法进行验证，结果表明，改善后的平均延误降低了34．6％．%When the T-shaped intersection having many left-turning vehicles and large demand of diago-nal pedestrians ,combined with the traffic characteristics of the vehicles and pedestrians ,a left-turning vehicles is presented and the design method of diagonal pedestrians crossing the street together ,and set diagonal lines of a zebra crossing and "Z"type pavement in the intersection .Comprehensive consid-ering the traffic conflicts and traffic delays ,the average delay model of pedestrian-vehicle conflict ,is established it puts pedestrian and vehicle as a whole to consider ,which can directly reflect the degree of con-flict ;Finally ,selecting a typical T intersection in Wuhan city for example ,through the model and VISSIM simulation verification ,the results show that the improved average delay w as reduced by 34 .6% .
摘要：Correction parameter set is determined to be the premise of microscopic traffic simulation model calibration parameters ,on the basis for building simulation model of expressway on-ramp and off-ramp .In order to research the impact of model parameters on main-to-side road travel time by BP neural network ,using the Latin Hypercube Sampling extracted 200 data sets as training samples and test samples .It can determine the training error minimizing network structure is 12-11-1 and weight between the layers after training and optimization ,the modified Garson formula can calculate the rela-tive sensitivity coefficient of the input variables on the evaluation index .According to the sorting of relative sensitivity coefficient can identify the key parameters w hich have a high sensitivity to main-to-side road travel time ,calibrating of these key parameters can reduce the complexity of parameter cali-bration .The results of model parameter sensitivity analysis based on BP neural network are similar with the practical experience .%待校正参数集的确定是微观交通仿真模型参数标定的前提与关键，在VISSIM 平台上构建快速路出入口匝道仿真模型基础上，为了利用BP神经网络技术研究模型中各参数对主-辅路行程时间这一评价指标的影响，使用拉丁超立方抽样抽取出200组数据作为训练样本及测试样本。经过训练、优化确定出训练误差最小的网络结构为12-11-1并获得各层间权重，改造后的Garson公式可以计算出各输入变量对评价指标的相对敏感度系数。根据相对敏感度系数排序可以确定出对主-辅路行程时间有较高敏感性的关键参数集，只对敏感度系数较高参数进行标定，减轻参数标定工作复杂度。基于BP神经网络对模型参数进行灵敏度分析的结果与实际使用经验较相似。
摘要：为安全操纵新建大型海船编队拖航通过长江安徽段狭水道河段，分析其通航的风险性，应用船舶操纵理论与数学方法，综合考虑船队受风、流影响致漂移情况下的船队通航所需航道宽度，和船队通航受风、流压力情况下船队所需要的操纵控制力，判断其适应性，确定拖航限制的风、流指标和拖航拖船功率的配备，以保障新建海船编队拖航的安全。%The navigation risk has been analyzed ,in order to keep the safety control of new large seago-ing vessel formation towing through Anhui section of the Yangtze River in narrow channel .The re-quired navigation channel width and fleet control force under the influence of wind and flow was com-prehensive consideration ,and its adaptability was decided by the ship's maneuvering theory and math-ematical method .This paper confirmed the wind ,flow index and the allocate equipment of towing tug power under the limit navigation to keep the safety of new-built seagoing vessel .
摘要：分析了提高高速公路收费站通行能力的有效方法，对高速公路车辆在进入收费站前采取强制的客货车分流，并研究减速设施的合理前置距离。通过在强制分流点前合理位置设置道路指示标志，采用安全的强制减速设施控制车速后，选用限高措施对小型车和货车进行强制分流以提高收费站通行能力。应用VISSIM软件对实行强制分流后收费站通行能力与采用分流设施前收费站通行能力进行比较，验证了分流设施的有效性。%The paper analyzes the effective methods to increase the capacity of highway toll gate .Man-datory van shunt measures are taken to the vehicles before entering the toll gate .The proposing direc-tion of deceleration facility is researched .Reasonable road directional signs are set in front of the forced diversion point and safe forced deceleration facilities are set to control the speed .Then the height limit installation is selected to diverse small cars and big trucks to increase the capacity of toll gate .Finally ,the capacity of toll gate before and after adopting compulsory diversion facility is com-pared with application of VISSIM software .The effectiveness of the diversion facilities is testified .
摘要：基于大型船舶操纵模拟器的基础上对目前世界上新建造的 Q-MAX型LNG船靠离洋口港LNG码头的风险进行评估。通过本船子系统和环境子系统和拖船子系统之间的有机组合，在模拟试验的基础上找出对靠离泊操作影响较大的风流浪的条件，并对其条件下进行更进一步的模拟及试验数据分析，建立相应的模型评价LNG船舶靠离泊风险。%This paper is based on the ship handling simulator to have risk assessment of LNG vessel berthing and departing the terminal .According to the simulation experimentations the conditions that have greater influence to the operation of berthing and departing can be selected through combination of the ownership sub-system and environment sub-system and tug sub-system ,then further experi-mentations and data analysis are carried out ,eventually the appropriate model is established to evalu-ate LNG vessel’s risk for berthing and departing .The conclusion can provide scientific reference for the configuration of tug and risk control w hen the port is open .
摘要：Methods used in environment impact assessment now include analytic hierarchy process method , fuzzy evaluation method and entropy method ,which can not solve the spatial problem .The noise of highspeed railw ay is alw ays engaged in large sclae ,w hich cause the using of space-based index .In this paper ,the pro-posed method is to use idea point method in every grid cell to assess the environment impact of noise produced by high-speed railway ,which can realize the spatial analysis of Environment Impact Assessment .Compared to tranditional methods ,this method is much more reasonable .%高速铁路噪声环境影响评价往往涉及到很大的范围，评价采用的指标因空间分布而不同，利用传统的方法进行统一整体的分析并不合理，为了解决这个问题，通过对GIS的栅格数据进行处理，分别对每一个栅格单元，利用理想点法进行决策分析，实现对高速铁路噪声环境影响的空间评价。利用该方法对高速铁路噪声环境影响进行评价，其结果与传统的方法相比更合理。
摘要：With the development of China's economy and the acceleration of global economic integra-tion ,more and more large-scale petrochemical ,power ,Heavy project began construction in the coun-try ,making the domestic international exceed the standard dimensions and weight of large equipment transport devices become increasingly frequent .In order to improve the safety and efficiency of large transport ,through a lot of investigation ,based on the supply and demand of large transport ,combi-ning of traffic engineering knowledge and the characteristics of the large transport ,considering of the feasible and economically viable ,timeliness ,extended four aspects of a comprehensive analysis are choosen to determine the principles of the large transport line selection .Objective optimization theory is applyed to preferably the east-west and the north-south highway transport route ,which provides a theoretical basis to build a large transport intermodal network in the country .%为了提高大件运输的安全性和效率，通过大量的实际调查，以大件运输的供需出发，结合交通工程学的知识和大件运输的特点，从可行、经济、时效、扩展四方面进行综合分析确定大件运输选线的原则，并应用目标最优化理论，优选出东西、南北方向的公路运输线路线。
摘要：为了有效地将机械设备滚动轴承的非线性、非平稳信号中的故障信号提取出来，将相关峭度引入轴承故障诊断领域，结合经验模式分解（empirical mode decomposition ，EMD）和相关峭度，提出了一种机械设备滚动轴承故障特征提取方法。该方法利用 EMD将振动信号分解成为多个确定的本征模态函数（intrinsic mode function ，IM F），然后根据相关峭度选取EMD分解后的分量，提取出机械设备滚动轴承的非线性、非平稳信号中的故障信号。通过仿真和实验研究验证了该方法的有效性。%In order to extract the fault signals from nonlinear and non-stationary vibration signal of roll-ing element bearing .,the correlated kurtosis is introduced into the field of bearing fault diagnosis . Combined with EMD and correlated kurtosis ,a feature extraction method is proposed .According to the method ,by EMD processing a group of IMFs are obtained ,then the component signals with lager correlated kurtosis are selected to be add together ,and the corresponding fault signal is clearly extrac-ted .The effectiveness of the method is demonstrated on both simulated signal and actual data .
摘要：When the big new intelligent clamshell dredger is working on the sea ,the accuracy require-ment of flat dredging will be inevitably affected by waves .By means of the expressions derivation of wave force and equations establishment of the ship movement ,and with the help of MATLAB to ana-lyze a specific clamshell dredger ,the effects come from diffrent waves with different frequency towards hull show that in normal operation conditions ,the influence can be ignored when comparing with the flat dredging accuracy requirement ± 25cm of the clamshell dredger .%新型智能化大型抓斗挖泥船在平挖作业过程中，由于海上波浪等外载荷作用，对其平挖作业的精度会带来一定影响。通过对波浪力表达式的推导以及船舶运动方程的建立，运用MATLAB编程求解的方法，以大型抓斗挖泥船为例进行了分析，得到了不同频率的波浪对船体位移的影响。结果表明，正常工作情况下波浪对于具有±25 cm平挖精度要求的抓斗挖泥船来说可以忽略其影响。
摘要：This paper proposed a concept of power quality signal template ,based on this proposed tem-plate-based power quality wavelet compression algorithm .The paper decomposed the power quality da-ta with 5-layer lifting wavelet transform ,coded the wavelet coefficient with this algorithm .Then the results with the traditional SPIHT algorithm is compared .Experimental results show that this algo-rithm was applied to power quality signal compression with excellent performance .%提出了电能质量信号模板性这一概念，在此基础上提出基于模板的电能质量小波压缩算法。在5层提升小波分解的基础上，利用该算法对小波域系数进行编码，通过实验与传统的多级树集合分裂（set partitioning in hierarchical tree ，SPIHT ）算法进行对比。实验结果证明了此算法应用于电能质量信号压缩具有优良的性能。
摘要：Numerical simulation of the external airflow around a car has been performed .The SIMPLE method and the RNG k-εturbulent model have been selected to solve the three-dimensional equations . The unstructured grids have been used to discrete the computational domain .Velocity and pressure boundary conditions have been specified to the inlet and the outlet .The distributions of the stream-line ,velocity ,pressure and aerodynamic noise on the car surface have been analyzed .The simulation results show that the pressure fluctuation around the car is the main cause that results in the aerody-namic noise .The simulation results are of important significance to the optimal design and noise con-trol of the car .%将SIMPLE算法与RNG k-ε湍流模型相结合，基于计算流体动力学完成了某车型外部流场的数值仿真。仿真计算的求解区域采用非结构化四面体网格进行离散，以速度进口、压力出口为边界条件，着重对该车型整车、中截面的流线、速度场、压力场及宽频气动噪声的声功率级分布进行了对比分析。仿真结果表明，外流场中沿车身外形的大幅度压力脉动是气动噪声的主要来源之一。
摘要：介绍了一种新型圆柱形浪潮流发电装置，该装置应用于立管式海洋平台，立管和浪潮流发电装置形成一个系统。探讨了雷诺数Re为200和10000的两种情况，进行FL U EN T计算，并和前人论文进行对比，以验证FLUENT数值模拟的准确性。从所受阻力的角度对立管和浪潮流发电装置形成的系统进行了位置优化，在位置的方向布置上得到了优选解，使立管所受冲击力最小，从而起到保护立管的作用，延长立管的使用时间。%A new cylindrical power generation device of wave is introduced .The device is used in the vertical tube type offshore platform .The vertical tube and the power generation device form a system .Two cases based on the Reynolds number of 200 and 10000 is calculated in FLUENT ,and compared with the precedent to verify the accuracy of the calcula-tion result of FLUENT .Location optimization of this system is done to minimize the pressure forces of the vertical tube from the aspect of the tubes'drag .The optimum solution is obtained ,which lessens the forces on the vertical tubes a lot and protects the vertical tube offshore platform .
摘要：In this paper ,we consider maintaining the original path of the airplane and crew scheduling and without increasing the total turnaround time ,building the objective function of maximizing the difference between before and after adjusting connection time of the propagation based on flight delays risk classification .According to the actual flight data of a major domestic airline ,we use the ILOG optimization software to solve the model .The results show that flight connection slack time optimiza-tion based on the flight delay risk classification reduce the total delay and the impact of delay propaga-tion ,and improve flight punctuality and passenger satisfaction .Simultaneously ,the flight connection slack time optimization based on the flight delay risk classification can be provided a theoretical basis for flight schedule .%考虑在保持原有飞机路线和机组任务不变，且不增加总的过站时间情况下，依据航班延误风险分级，建立以调整过站时间前后波及延误的时间差值最大化为目标，优化航班衔接过站松弛时间。结合国内某大型航空公司实际航班运行数据，运用ILOG优化软件求解。结果表明，基于航班延误风险分级的过站松弛时间优化有效地减少了航班延误的传播，使总的延误减少，提高了航班正点率和旅客满意度。同时，基于航班延误风险分级的过站松弛时间优化可以为航班计划的制定提供理论依据。
摘要：In order to predict the tandem propeller hydrodynamic performance ,the surface panel meth-od is used to establish the steady hydrodynamic interaction model .The interaction between the for-ward and aft screws is considered through the induced velocities .Due to the relative position between the forward and aft screws remains the same ,the induced velocities are instantaneous .The forward and aft screws’ hydrodynamic performance is obtained through steady calculation ,and the trailing vortex model used is linear ,an iterative calculation method is used until the hydrodynamic perform-ance converges .Comparing the results of calculation about three sets of tandem propellers with the experimental data show s that this method can effectively predict the tandem propellers ’ steady hydro-dynamic performance .%为了预估串列桨水动力性能，采用面元法建立了定常水动力干扰模型。前、后桨之间的干扰通过诱导速度进行考虑。由于前、后桨之间的相对位置保持不变，所以相互之间的诱导速度为瞬时诱导速度，前、后桨水动力性能通过定常求解获得，采用线性尾涡模型，彼此迭代直至水动力性能收敛。对三组串列桨进行计算并同实验值进行比较分析，结果表明：该方法可以有效地预报串列桨定常水动力性能。
摘要：针对非特定文本的说话人识别，研究了特征提取方法及SVM核函数和参数选取对识别结果的影响，分析了现有的语音特征提取算法及各自的优缺点，以及不同核函数、核参数及惩罚参数对识别性能的影响。采用改进的网格寻优方法，进一步提高语音信息的识别时间。%The paper chose a fold that a non-specific text speaker identification .The paper focused on feature extraction methods and SVM kernel function and parameter selection on the identification re-sults ,focusing on analysis of the existing voice feature extraction algorithms ,their advantages and disadvantages ,different kernel function ,kernel parameters and penalty parameters on the recognition performance .Grid search method is introduced in order to improve the recognition time .
摘要：针对海上交通工程学中的密度-速度（流量）关系图“线性假设”的不严密性，利用基于 AIS的元胞自动机船舶交通流模型模拟再现船舶交通流，然后统计出船舶交通流密度-速度（流量）基本关系图，并给出其三相交通流理论的解释；模拟研究发现，船舶交通流包含自由流、同步流和拥挤流三种相态，相态之间的转换也包含自由流与同步流、同步流与堵塞流两种形式；船舶密度-速度之间并非简单的线性关系，船舶密度-流量之间也不是二次抛物线关系，而是不明确的多值关系。模拟方法和结论有助于解释一些复杂的水上交通现象。%Against the non-stringency of linear hypothsis in ship traffic density-velocity equations in marine traffic engineering ,and as per the ship cellular automata model on AIS-based ,simlation is car-ried ot to reproduce ship traffic flow of waterway in micro level .The simulation results are refined and new ship traffic density-velocity (flux ) non-linear equations are presented ;T he three-phase traffic the-ory explication is given .the simulation results show that ship traffic contains free flow ,synchronized flow and congestion flow ;and phase changes contain free 1 synchronized and synchronized 1 jam .The sim-ulation method and conclusions could help to explain some complex phenomena of marine traffic .
摘要：以南京市纬三路过江通道工程为例，针对其特殊环境和结构特点，结合理论分析和结构计算成果，明确了高水压、大直径和长距离水底盾构隧道健康监测的项目、内容和重点。将光纤传感元件为主的传感监测技术、数据采集与处理技术和结构安全评估技术相结合构建完整的结构健康监测系统，以保证纬三路盾构隧道结构的安全营运。%T his paper makes the content of the structure health monitoring clearly and underlies the key point for high pressure ,large diameter and long distance underwater tunnel through theoretical analy-sis and calculation results .In order to ensure the security operation ,TSHMS is made by sensing mo-nitoring technology ,data acquisition ,data analysis ,and the evaluation technology of structural safety . T he research results can provide references and experiences for the design and construction of struc-ture health monitoring system of similar tunnel .
摘要：通过总结抓斗挖泥船目前主要的疏浚方法、特点及适用范围，并结合工程实例，设计研究了钢桩式抓斗挖泥船的新型疏浚工艺，并以节能为目标，对抓斗排斗数与分条挖掘宽度的关系进行了分析，提供了挖掘工艺的优化设计方法。%By summarizing main dredging methods ,characteristics and application scope of dredging clamshell and referring to projects ,a new dredging process has been researched and designed .For the purpose of energy saving ,the relationship between the number of grab bucket and splitting row width has been analyzed .Eventually a optimized design method of dredging process is provided .
摘要：采用一种离散动态系统的扰动分析方法，通过对系统输入参数引入虚扰动，获得航空器到达时刻延误随扰动大小变化的估计。以上海终端区离场航空器为例，得到航空器的无冲突放行时刻，并验证调整后的放行时刻对于时间参数的摄动具有一定的鲁棒性。%Using perturbation analysis of discrete dynamic system ,the change of aircraft arrival time delay with perturbation size is estimated when virtual disturbance is introduced to a certain parameter . Taking Shanghai terminal area departing aircraft for example ,conflict-free aircraft release time is cal-culated ,and it is verified that adjusted release time has a certain degree of robustness on the perturba-tion of time parameter .
摘要：A supply chain consisting of a single supply and a single maker is considered .When supplier w hich faced financial constraints uses factoring financing mode ,the changing of the order quantity and the capital will affect the distribution of profits between the node enterprises in a supply chain .The model of revenue-sharing mechanism based on factoring financing is built w hich considered the demand with price sensitivity . Proved by theory ,it gets a conclusion that revenue-sharing contract can be made to coordinate under factoring financing and distribute the profit reasonably and improve the oper-ational performance of entire supply chain .Finally the results are analyzed with numerical examples .%在单一供应商和单一制造商构成的两级供应链中，供应商面临资金约束时采用保理融资模式，订货量和资金的变化会影响供应链节点企业的利润分配。在保理融资模式下，为了确定合理公平的收益分配机制，建立了需求具有价格敏感性的收益共享契约模型，通过理论证明得出在保理融资下收益共享契约能使供应链达到协调，实现收益的合理分配，并能够改进供应链整体绩效。最后通过数值计算证明了结论。
