Research on the Test of Markov Switching Model According to the τ Statistics

本文根据Markov机制转换模型状态变量预测概率分布特性的分析,提出了基于τ统计量对模型状态数目的检验方法,还运用蒙特卡罗模拟方法模拟了检验所需要的τ统计量的经验分布。检验方法在计算上简单,不存在模型估计过程中多余参量问题的困扰,是一种简便可行的检验方法。最后,运用该检验方法对Hamilton的美国GDP模型进行检验研究,结论支持Hamilton的模型,认为美国GDP确实存在两个不同的增长状态。For the first time,the paper analyzes the character of the state variable's forecasting probability of the Markov Switching Model and proposes a new method of testing the model according to the statistics.The paper also simulates the empirical distribution which is necessary to the τ test by Mont Carlo method.The method of test has the advantage of simple computation and without nuisance parameter problem.At last,we test the Hamilton's America GDP model using our testing method.The paper gets the result that Hamilton's model is reasonable and the American GDP growth rate really has two different states

智能制造刀具管理系统及刀具剩余寿命监测功能开发

伴随智能制造技术的深入推进,刀具管理系统的功能根据用户业务需求在不断拓展。针对工艺设计后的刀具选购、使用直至报废等环节,基于\"刀具流\"开发了一款智能制造刀具管理系统,更精确地实现了刀具使用过程的数字化、网络化、智能化和可视化全生命周期管理。鉴于目前刀具状态监测技术的复杂和可靠性低等问题,在工程应用上提出了一种基于被加工工件表面粗糙度间接预测刀具剩余寿命的方法。整个系统在现场得到了良好应用。2016年工信部智能制造综合标准化与新模式应用项目(工信部联装[2016]213号);;国家自然科学基金项目(51605403);;福建省产业技术联合创新专项(闽发改投资[2016]482号

Population genetic structure of three stocks of Acanthopagrus schlegelii based on mtDNA control region sequences

本研究通过控制区序列片段,分析来源于浙江东极(dJ)、广东澳头(AT)及海南万宁(Wn)海域3个黑棘鲷ACAnTHOPAgruS SCHlEgElII野生群体间的遗传多样性、遗传结构及群体历史动态。d-lOOP基因序列测定结果表明,3个群体88个个体长序列长度范围为715~716bP,共定义了59个单倍型,单倍型多样性0.949~0.985,核苷酸多样性0.0068~0.00901,表明选取的3个野生群体都具有较高的遗传多样性水平;由AMOVA分析结果可以看出,东极与澳头2个群体的遗传分化较为明显,其余群体间则无明显的遗传分化;构建的单倍型邻接关系树显示出3个群体未有明显的谱系结构,从而支持了可将黑棘鲷南方群体归为同一个管理单元的观点;中性检验及核苷酸不配对分布表明黑棘鲷经历过更新世晚期的群体扩张事件。地理历史事件、海流及人工增殖放流的影响可能是黑棘鲷各群体现有的遗传多样性和遗传结构的主要原因。In order to elucidate background information on the genetic diversity and population history of Acanthopagrus schlegelii, the genetic diversity, population genetic structure and demographic history of Dongji stock, Aotou stock and Wanning stock of the black porgy were analyzed based on the control region fragment of mitochondrial DNA in this study.The results showed that the sequences of 88 individuals of the three stocks were 715~716 bp in length and that there were 59 haplotypes.The value of haplotype diversity ranged from 0.949 to 0.985 and the nucleotide diversity, from 0.0068 to 0.00901.These results indicated that the three wild stocks presented a high level of genetic diversity.Significant population differentiation was detected for the two populations of Dongji stock and Aotou stock, while there was no significant genetic differentiation between Dongji stock and Wanning stock as well as between Aotou stock and Wanning stock.In addition, no obvious lineages and geographic clusters were found in the neighbor-joining tree, which supported the notion that unique management unit(MU) was recognized on the basis of the southern populations.Both neutrality tests and mismatch distribution analysis suggested a late Pleistocene population expansion for the three stocks.The genetic diversity and population genetic structure revealed were attributed to the absence of geographic barrier, influence of sea currents and human activities.海洋公益性行业科研专项项目(201005013、201105012

Sulfate removal effect of molasses alcohol wastewater pretreated by physical and chemical methods and its biogas production performance

Molasses alcohol wastewater normarlly contains high quantity of SO4 which can restrain the production of the biogas. In this paper, we used the activated carbon, Ba Cl2·2H2O, Ca（OH）2 and iron carbon micro cell to pretreat the molasses alcohol wastew

Realization of Kelp Monitoring System Based on LabVIEW

系统作为一个海洋赤潮检测的一个子项目,需要实现对采样海水水藻浓度的稀释以及检测。系统由PC机构成上位机,单片机作为下位机。利用LabVIEW图形界面设计的强大功能实现上位机的界面设计以及程序设计。使用LabVIEW的串行模块实现与下位机的通信。下位机部分采用成本低廉的单片机AT 89C52,以RTX51嵌入式实时多任务操作系统为核心构建数据采集控制系统。既充分利用了LabVIEW的强大功能,又充分利用RTX51操作系统提高了系统的稳定性。This paper designs a system to obtain and dilute the algae concentration of sampling sea water as a sub project of a red tide monitor system.This system realizes the interface design and program in PC as Mater system by using LabVIEW′s powerful and popular graphical language.It realizes the communication between PC and microcontroller by using the function of serial communication in LabVIEW.It realizes the data sample and control by using the RTX51 RTOS.This design is based on the powerful functions by LabVIEW and the stabilization by RTX51.国家863项目(2003AA635160);; 卫生部科学研究基金-福建卫生教育联合攻关计划资助项目(WKJ20052001

Implement of Timing Synchronization for ofDM Underwater Communication System on FPGA

结合水声信道和线性调频(lfM)信号的特点,采用lfM信号作为OfdM水声通信系统的定时同步信号。介绍lfM信号的产生和检测原理,并在fPgA上实现了lfM定时同步信号的产生和同步信号的检测。通过实验室水池实验,验证了该方案的可行性。Based on characteristics of underwater acoustic channel and Linear Frequency Modulation(LFM) signal,LFM signal is adopted for timing synchronization signal of ofDM underwater communication system.The generation and detection principle of LFM signal are summed up.Then the scheme based on the theory above is implemented on Field Programmable Gate Array(FPGA).Finally,the result of pool test shows the feasibility of the scheme.国家自然科学基金资助项目(60772141

支持向量机的激光检测系统误差补偿及系统开发应用

分析了激光三角法测距的位移以及包括入射倾角在内的被测表面特性等误差影响因素;用高精度激光干涉仪和正弦规对激光位移传感器进行校对试验,并用支持向量机学习方法建立了误差补偿模型;基于激光位移传感器方法和机器学习误差预测模型,使用PyQt设计并实现了激光检测误差补偿系统。应用表明,激光检测误差补偿系统可以有效地减少激光位移传感器的测量误差。2016年工信部智能制造综合标准化与新模式应用项目(工信部联装[2016]213号

The Artificial Synthesis of TAT PTD and Tachyplesin Fusion Gene by Overlap Extension PCR

为探讨HIV-TAT蛋白转导域(PrOTEIn TrAnSduCTIOn dOMAIn,PTd)对中国鲎抗菌肽TACHyPlESIn的协同作用,试验以经毕赤酵母密码子优化后的TACHyPlESIn成熟肽(54 AA)加TAT PTd(11 AA)的CdnA序列为参考模板,设计了6条单链寡核苷酸片段,首尾引物的5'端分别引入ECOr I和XbA I酶切位点,通过重叠延伸PCr方法成功合成了TAT PTd+TACHyPlESIn序列,序列全长219 bP,为其后续功能与协同作用研究奠定了基础。In order to study the coefficient of the TAT PTD(the protein transduction domain in HIV-1 transactivator of transcription protein) to the antibacterial peptide tachyplesin from Tachpleus tridentatus,6 sequence of oligonucleotides with EcoR Iand Xba I in the ends of 5′-end of the first and last primers respectively were designed,based on the TAT PTD and tachyplesin mature peptide cDNA template,which was optimized according to the Pichia pastoris preferred codon.A optimized TAT PTD and tachyplesin fusion gene with 219 base pairs was artificially synthesized by overlap extension PCR,which laid a preliminary foundation for the following functional and coefficient studies.广东省自然科学基金(06025389); 福建省博士后项

阶梯电价机制下居民用电中期负载预测研究

实行阶梯电价已成为缓解我国能源供应紧缺、资源交叉补贴不合理等矛盾的重要举措。准确地刻画阶梯电价下的动态用户需求,有利于提高负载预测准确度。拟从现行递增阶梯电价动态需求的特征出发,提出一个新的分类负载预测模型。首先通过模糊聚类分析对某地区居民用电行为进行聚类;然后针对不同用户类别进行数据分类,再分别建立基于自组织模糊神经网络的负载预测模型;最后对各个模型进行加总。通过某地区实际居民数据检验,验证了分类负载预测模型的有效性。相比于传统的单一模型,新分类模型的预测准确度得到了提高,进一步保证了电网公司为居民提供高质稳定的供电服务,同时帮助降低了电网公司的运营成本,提高了经济效益。国家自然科学基金(71301133);; 教育部人文社会科学研究项目(13YJC630033

虾池沉积环境中若干功能菌及弧菌的时空变化

2003年10月～2004年5月在泉州东海一新建虾池与一池龄15年的老旧虾池,采用平板计数方法研究底泥环境中可培养异养菌(HB) 、淀粉降解菌(AB) 、有机磷降解菌OPB) 、无机磷溶解菌( INP) 、几丁质降解菌(CB) 、油脂降解菌(LB) 、纤维素降解菌(CLB) 、硫氧化细菌( SOB)等各种功能菌以及弧菌(VB)数量的变化情况,并对它们与可培养异养菌之间的相关关系进行了探讨. 结果表明,在整个养殖期中,新池泥样中可培养异养菌总数范围在1. 95 ×104 ～7. 7 ×105CFU /g之间, 旧池泥样中可培养异养菌总数范围在2 ×104 ～1. 88 ×105 CFU /g之间,两池的数量变化波动均较大,其它功能菌与异养菌相似,在整个养殖周期也是呈现较大的波动幅度, 但统计分析表明淀粉降解菌、有机磷降解菌、油脂降解菌、弧菌等与可培养异养细菌之间呈现着明显的正相关,而几丁质降解菌、无机磷溶解菌、纤维素降解菌以及硫氧化细菌与异养菌之间则无明显的相关关系.国家863项目(2002AA603013) ,国家自然科学基金项目 (30370276) ,福建省科技重点项目(2004 I023)资