定宽机主曲柄初始位置对模块有效行程的影响

系统地模拟了SP定宽机同步机构和侧压机构的运动规律，采用Powell优化理论，以模块最大有效行程为目标函数，以主曲柄初始角度和偏心距为变量进行优化分析，得到一组最优解。该结论为现场控制定宽机主曲柄的初始位置提供了理论依据。     

大型餐饮软件系统的信息管理与实现

由于现有大型餐饮管理软件系统没有很好地考虑对象本身自有的规律，成功的案例很少．根据一大型餐饮管理软件系统的设计与实现，从信息控制角度阐述了一些独特的系统设计思路．实践证明，这些方法的应用不仅大幅度地提高了该企业的工作效率，而且提高了员工的工作积极性和主动性．很好地实现了系统开发目的．     

服装风格的量化方法初探

为使企业能够自主控制服装风格，减少由设计师更换带来的品牌风格波动，使企业决策者能够把握服装的设计风格，尝试对服装风格进行量化，以找到品牌服装风格的内在规律，使服装的风格控制成为一种技术手段。通过多次实验，找到较可行的量化方法并进行初步量化，得到初步量化结论。     

Characterization of polyphenol oxidase from plants

Polyphenol oxidase (PPO) which can mediate browning reaction is a bifunctional copper-containing enzyme encoded by plant nucleolus gene. It usually leads to excessive browning reaction which reduces the coercial profits of fruits and vegetables. In this paper, PPO genes and enzymes in plants are characterized systematically, and the latest progress is reviewed. Some clonings of PPOs genes are reported; the specific temporal and spatial expression pattern of PPOs genes is described; the model of the structure of the precursor form of catechol oxidase is introduced; the possible functions of PPOs in defending against pathogen, wounding, surrounding stress and other inducing factors are demonstrated; the induction and activation of latent PPOs in some plants is elucidated; the scheme of browning inhibition by L-cysteine is clarified; the mechanism of suicide inhibition of latent PPO and kinetic synergism are established. Furthermore, the area for future study is also discussed.     

Relationship between the exposure dose of high intensity focused ultrasound and the heated necrosis element

Heated necrosis element of tissues is the basis for treating tumor by high intensity focused ultrasound (HIFU), so study on the relationship between the HIFU exposure dose and the heated necrosis element of tissues is of great significance for both HIFU clinical applications and basic research. Using Pennes and Rayleigh formulae the relationship between the exposure dose of an annular focused transducer and the heated necrosis element (I.e. Biological focused region) in a bovine liver in vitro at a depth of 2 cm is simulated in an exposure dose range with radiation sound intensity of 7000～25400 W/cm2 and exposure time of 0～20 s. The theoretical results appear to be in quite good agreement with the experimental ones. It is shown that on the basis of existing theories the heated necrosis element produced by HIFU exposure can be predicted. The deviation of the theory from the experiments under higher exposure dose has also been discussed.     

目标数量折扣下的供应链协调分析

目前国内一些行业的公司在销售渠道中常用目标数量折扣的契约模式。本文通过一个两阶段一对一的供应链模型分析了在这种契约下供应链的协调性，以及它对供应链利润分配的影响。最后针对某品牌型号的手机进行了实证分析。     

热轧钢管主生产计划模型与算法研究

建立了热轧无缝钢管主生产计划问题的混合整数线性规划模型．该模型可归结为多阶段多产品带有能力约束的批量问题，但与传统批量问题存在以下不同：①充分反映了钢管企业与其它行业的不同工艺特点；②目标函数追求最大化现金流而不是最小化成本；③允许订单积压；④考虑库存能力约束；⑤忽略设置时间及成本。但引入了最小生产批量约束．鉴于该问题的NP难性，使用两种基于优化的启发式算法进行求解，并提出两条策略加以改进．     

线性调频信号参数快速估计

针对采用线性调频(linearfrequencymodulation,LFM)信号体制的参数估计的应用场合,提出了一种消除最大似然估计时带来旁瓣的算法。该算法利用雷达回波信号的对称性上来获取统计样本,因而在无需对雷达系统作任何改进的情况下,可获得对LFM信号参数较好的估计。通过结合解线调估计运算量少的特点,有效地减少了估计的运算量,提高了估计精度。给出了应用该方法的具体步骤,通过仿真实验证明该算法的有效性。     

飞机旋转叶片回波频谱特征分析

飞机目标发动机叶片的周期性旋转运动导致目标散射回波中出现周期性运动部件调制频谱分量,在某些姿态下该频谱分量幅度呈sinc(x)包络状,并不对称分布于机体多普勒频谱分量一侧。为揭示这一现象,在对旋转叶片组建立电磁散射模型和对风扇目标进行试验测量基础上,分析了叶片长度、倾斜角和扭角等结构参数对周期性运动部件调制频谱分量分布规律的影响。结果表明叶片扭角是导致该现象出现的主要原因。     

自适应OFDM系统中调制识别算法研究

提出了一种适用于快衰落信道下自适应OFDM系统的调制识别算法。在信道估计和频域补偿的基础上,利用子载波组样本的6阶和8阶累积量识别5种调制信号。仿真结果表明,该算法具有良好的识别性能和稳健性,在SNR=16 dB,移动台速度小于40 km/h的条件下,调制方式的正确识别率可在到95%以上。