摘要：介绍了双闭环比值控制系统的设计思路以及在氯乙烯合成装置中乙炔和氯化氢比值控制系统的设计和应用 ,以及在设计比值控制系统时所应注意的有关事项。

摘要：To improve the accuracy and usability of the superconducting electron cyclotron resonance ion source with advanced design in Lanzhou(SECRAL), an upgraded version of the control system was designed and tested. This paper details the architecture of the optimized control system and presents the results of its use in the long-term operation of the accelerator. The control system software, based on Visual C++, was developed following the model-view-controller architecture design pattern. The data acquisition system was based on a field-programmable gate array integrated circuit. In addition, control strategies were optimized for higher operational stability. The upgraded control system was tested with a U^(33+) ion beam at SECRAL, where it provided a data acquisition time of less than 1 ms. The fast reaction time and highprecision data processing during beam tuning verified the stability and maintainability of the control system.

摘要：铝基覆铜板(即铝基板)是电子产品的基板材料,其低导热率是设备器件可靠性、稳定度和使用寿命的保证,因此关于其导热系数测试方法的研究有着重要的意义。针对传统测试方法的不足,提出一种基于标准样本参比法和温度场函数法的新的导热系数测试方法——综合法。参比法让待测试件以样本试件为参照,利用两者已知的导热系数比值,求出待测试件导热系数;函数法根据传感器反馈的温度值建立此时的测试环境内温度分布函数模型,进而求出待测试件导热系数。两者的均方根值即为综合法所求值。基于该方法,设计了一套铝基板导热系数测试仪。实验表明该方法测试精度较高,能满足生产实践的需求。

摘要：为提高监测便利性,在状态监测系统中添加移动终端,设计一个面向移动终端的电力系统设备状态在线监测系统。建立包括数据采集、传输、分析与表现的系统整体框架;分别对多通道数据采集传感器开关电路、边界网关、端口间数据传输模块进行设计;检测电力系统设备故障存在性与严重性,对电力系统设备状态的不同故障程度进行分类;利用移动终端设计设备状态在线安全监测方法判断数据是否安全传输到移动终端。实验结果显示,该系统可以通过传感器完整地收集电力系统设备的数据,并对其进行有效分析,该系统在设备状态的监测方面具备可行性。

摘要：Objective To develop RT-nPCR assays for amplifying partial and complete VP1 genes of human enteroviruses(HEVs)from clinical samples and to contribute to etiological surveillance of HEV-related *** A panel of RT-nPCR assays,consisting of published combined primer pairs for VP1 genes of HEV A–C and in-house designed primers for HEV-D,was established in this *** sensitivity of each RT-nPCR assay was evaluated with serially diluted virus stocks of five serotypes expressed as CCID50 perμL and copies perμL,and the newly established methods were tested in clinical specimens collected in recent *** The sensitivity of RT-nPCR assays for amplifying partial VP1 gene of HEVs was 0.1 CCID50 perμL and 10 virus copies perμL,and for the complete VP1 gene was 1 CCID50 perμL and 100 virus copies perμL,using serially-diluted virus stocks of five *** a proof-of-concept,25 serotypes were identified and complete VP1 sequences of 23 serotypes were obtained by this system among 858 clinical specimens positive for HEVs during the past eight surveillance *** This RT-nPCR system is capable of amplifying the partial and complete VP1 gene of HEV A–D,providing rapid,sensitive,and reliable options for molecular typing and molecular epidemiology of HEVs in clinical specimens.

摘要：开展了4个翼缘削弱的钢管混凝土柱穿入式组合节点抗震性能与三维实体有限元精细化模型分析。在混凝土三轴塑性损伤和钢材混合强化模型基础上,进一步引入钢材的韧性损伤模型,探讨了钢梁削弱程度对节点抗震性能与破坏形式的影响规律,结果显示引入钢材韧性损伤的有限元模型分析结果与试验结果更加吻合,且钢梁削弱程度降低了该节点的刚度、承载力和耗能。随后对不同钢梁尺寸和柱端拉筋强构造下的组合节点进行了承载力、刚度和塑性耗能分配与失效机制的影响规律分析,分析结果表明:穿入式节点分别在梁-柱抗弯承载力比介于1.66~2.11、梁-柱线刚度比介于1.90~1.96、梁-柱截面刚度比介于1.16~1.21时,将由梁耗能向柱耗能转变;柱端拉筋强构造技术后,由于拉筋直接约束混凝土,大幅度提升了柱端抗弯承载力和耗能能力,组合节点在高轴压比时仍维持梁端失效破坏模式;根据《建筑抗震设计规范》,梁-柱抗弯承载力比取值小于1时为强柱弱梁,这对穿入式组合节点强柱弱梁的定义较为保守。

摘要：A 3D synchronism deployable antenna was designed, analyzed, and manufactured by our research group. This an-tenna consists of tetrahedral elements from central element. Because there are springs at the ends of some of the rods, spider joints are applied. For analysis purpose, the structure is simplified and modelled by using 2D beam elements that have no bending stiffness. Displacement vectors are defined to include two translational displacements and one torsional displacement. The stiff-ness matrix derived by this method is relatively simple and well defined. The analysis results generated by using software de-veloped by our research group agreed very well with available test data.

摘要：基于AMESim仿真平台,结合工程实例(软管恒张力控制系统),以A4VG闭式泵和专用设计的比例恒压控制阀组为基础建立数学模型,对泵的变量控制机构及远程恒压控制调节原理进行仿真分析。在对系统进行仿真和实验的基础上,分析了远程比例溢流阀调定压力和实际工作压力之间的关系和配置不同的阻尼孔对系统调定压力的影响。该系统比泵出口直接加溢流阀调压的方案具有更小的发热量及更好的节能效果,对于该系统在特定工况下的使用起到了一定的启发作用。

摘要：提出一种可用于说话人识别的自适应 RBFN 阵列。RBF 网设计的核心在于确定网络中心的数目及位置,该自适应算法有效地融合了 IOC 与 ROLS 算法的优点,不仅能动态调节RBF 网的隐节点数,还能使网络的数据中心自适应变化,很好地优化了网络的结构。用与文本无关的闭集说话人识别系统对该算法进行了验证,实验结果表明,该方法与传统的 RBF 算法相比,自适应 RBF 网具有较好的鲁棒性以及精简的网络结构等优点。

摘要：This paper proposes a design of passive cooling system for CPR1000 spent fuel pool(SFP). Our design can effectively manage the SFP temperature not to exceed80 C. Then the transient analysis of the CPR1000 SFP with designed passive cooling system is carried out in station blackout(SBO) accident by the best-estimate thermal-hydraulic system code RELAP5. The simulation results show that to maintain the temperature of CPR1000 SFP under 80 C, the numbers of the SFP and air cooling heat exchangers tubes are 6627 and 19 086, *** height difference between the bottom of the air cooling heat exchanger and the top of the SFP heat exchanger is3.8 m. The number of SFP heat exchanger tubes decreases as the height difference increases, while the number of the air cooling heat exchanger tubes increases. The transient analysis results show that after the SBO accident, a stable natural cooling circulation is established. The surface temperature of CPR1000 SFP increases continually until 80 C, which indicates that the design of the passive air cooling system for CPR1000 SFP is capable of removing the decay heat to maintain the temperature of the SFP around 80 C after losing the heat sink.