摘要：本文综合深海原位探测的需求,提出基于新型闪烁晶体碘化锶(SrI_(2)(Eu))及新型半导体探测器碲锌镉(CZT)作为探测单元的复合式谱仪总体设计方案,采用模块化设计方法,对两种不同的探测单元设计了不同的信号放大与处理方式并对其进行电子学实现,同时针对谱仪由于温度改变引起的能谱峰位漂移进行了温度补偿。并对谱仪进行了实验,结果表明探测谱仪可以同时满足深海原位伽马探测高效率与高分辨率的需求,SrI_(2)(Eu)闪烁晶体探头探测效率可达32%@662 keV,同时能量分辨可达4.3%@662 keV。CZT探测单元能量分辨率1.7%@662 keV。温度修正的引入可有效抑制温度变化引起的能谱峰位漂移。

摘要：CSNS Back-n实验环境中复杂的γ本底会影响中子俘获截面测量结果的准确性。本文将康普顿散射成像的原理引入总能量型探测器,开展用于中子俘获反应截面测量的康普顿相机读出电子学的研究,通过计算γ射线的入射方向抑制本底,从而提高效应本底比。其中探测器选用低本底高分辨的CeBr_3晶体耦合硅光电倍增管(SiPM)进行设计,并基于ASIC和FPGA对320路SiPM输出信号进行读出,通过高性能TDC与QDC实现对γ射线的时间与能量的测量。经过测试,康普顿相机的能量分辨率好于5.7%@662 keV,符合时间分辨σ_t为0.66 ns,eV能区和keV能区的效应本底比分别是现有C_6D_6探测器的1.61倍和3.30倍。测试结果说明了该方案的可行性,可为在Back-n上开展中子俘获反应截面测量提供技术支撑。

摘要：For modern particle physics experiments,trigger-less data acquisition(DAQ) system has been put into practice because of the need of reaction multiplicity and trigger *** such new DAQ systems,global synchronized clock plays an important role because it affects the granularity of time slice and precision of reference *** this paper,a novel synchronized clock distribution method is *** the help of modulation technique,master clock module distributes system clock to each slave *** synchronize slave clocks,the propagation delay is adjusted and the clock phase is aligned by an FPGA chip ***,an ADCbased method is proposed to evaluate the performance of multi-module clock synchronization *** experiments of a prototype system show that slave clocks can be synchronized less than 100 ps over 150 m *** proposed method is simple and flexible,and it can be used in trigger-less DAQ system and other applications of clock distribution preciously.

摘要：为改变传统不合理施肥方式,探索土壤环境改良措施,为区域科学施肥筛选提供数据支撑和理论依据,本试验于贵州省惠水县山河村,选取当地主推品种威芋3号为供试材料,采用“3414+1”设计,通过调查马铃薯的生育期变化、性状及产量构成因子等指标,探究惠水县马铃薯主产区最适宜的氮、磷、钾配比及施用量,推进该区域马铃薯种植实现科学施肥。结果表明:“3414+1”设计田间施肥方案对马铃薯生育进程无明显影响;以处理6马铃薯产量最高,为2296.70 kg/667m^(2),较对照处理增产1329.66 kg/666.7m^(2),增产明显;该处理下马铃薯农艺性状及经济性状均表现较好。综合考虑,该区域马铃薯配比肥合理配合式为10-6-16,即最佳施肥量为尿素22 kg/666.7m^(2)、过磷酸钙50 kg/666.7m^(2)、硫酸钾32 kg/666.7m^(2)。建议当地农业技术管理部门以此肥料配比作为施肥建议,助推区域农业科学施肥增效方案落地,促进农业绿色高质量发展。

摘要：In this paper,a general method of data transmission system design on PXI platform is *** can be used in readout system design for physical *** aims at providing reusable and general interfaces for customized design of PXI while maintaining the transmission *** has three main features:(1)universal logic hardware interface,(2)ethernet based socket software interface,and(3)specific and simple data transmission *** transmission on PXI bus can be realized with the said two universal interfaces coordinated by this specific *** shows that this method is feasible and *** method can be easily reused in readout system designs for different experiments.

摘要：以耐热型水性聚氨酯为成膜剂,代替环氧成膜剂应用于PPS/LGF复合材料。采用熔融共混工艺和熔融浸渍制备了PPS/LGF复合材料,并对复合材料的力学性能和微观复合界面进行研究。结果表明:在玻璃纤维质量分数为30%与40%时,复合材料的拉伸强度分别为128.3 MPa和171.7 MPa;弯曲强度分别为281.1 MPa和301.3 MPa;弯曲弹性模量分别为14.18 GPa和19.48 GPa;缺口冲击强度和无缺口冲击强度分别为13.19 kJ/m^(2),43.59 kJ/m^(2)和16.12 kJ/m^(2),43.97 kJ/m^(2)。聚氨酯成膜剂的PPS/LGF复合材料的拉伸强度、弯曲强度、弯曲弹性模量、缺口冲击强度和无缺口冲击强度相较于环氧乳液制备的PPS/LGF复合材料分别提高了21.7%,9.7%,17.1%,9.7%和6.4%。

摘要：The quality of contour blasting depends on many initial blasting *** parameters including blasthole diameter,rock Protodyakonov coefficient,tunnel area and distance between cracks on the tunnel face are more *** this study,an algorithm linking between Delphi programming language and AutoCAD was created to develop a tunnel blasting *** this model,tunnel contour blasting passport in AutoCAD can be obtained *** effects of rock Protodyakonov coefficient and cracks’distance on blastholes number and specific charge with the variation of blasthole diameter and the semi-circular tunnel face area were investigated to yield a set of equations with the highest *** results show that specific charge increases as rock Protodyakonov coefficient,cracks’distance and drillhole diameter increase,but decreases when tunnel face area *** addition,the number of drillholes increases linearly as tunnel face area increases but decreases when drillhole diameter increases.

摘要：基于资源保存理论和社会交换理论,探讨工作资源对新生代知识员工创意领地行为的影响机制。以317份“90后”新生代知识员工为样本,应用结构方程模型和模糊集定性比较分析法进行分析,结果表明:工作资源负向影响新生代知识员工的创意领地行为;组织支持感与预期互惠关系在工作资源对创意领地行为的负向影响中发挥部分中介作用及链式中介作用;根据模糊集定性比较分析结果,得出两类激发员工创意共享的前因构型,包括以高工作资源为核心的资源主导型和以高职位为核心的责任主导型。

摘要：针对员工创意领地行为对企业创新发展存在着一定不利影响的问题,基于社会交换理论和社会认同理论,通过352份来自高科技企业员工的研究样本,分析悖论式领导对员工创意领地行为的影响。研究结果表明:悖论式领导对员工创意领地行为有负向影响作用,该过程是通过以情感导向的团队互动的中介作用实现的,而以事实为导向的团队互动中介效应不显著;个体主义不仅能够增强情感导向的团队互动对创意领地行为的负向影响,还对情感导向的团队互动在悖论式领导与员工创意领地行为关系间的中介效应具有强化作用。为促进组织降低员工创意领地行为,提出领导者培养自身接受并协调矛盾的能力、注重员工个性化发展、重视营造良好的团队氛围和促进团队互动、注重明确员工个人创意在团队中的归属问题等措施和建议。

摘要：将服饰产品设计中的丝带绣设计与数字化技术相结合,通过丝带绣设计规律的分析、各种数字化实现方案的对比,对如何实现丝带绣的虚拟设计进行研究和分析.并以VC++6.0为平台,采用C++语言开发了丝带绣虚拟设计系统.研究表明,该系统能较真实地展示设计完成的丝带绣作品的效果,具有快速、方便、智能、真实等特点,将该系统运用于实际生产中能省略样绣的过程,从而缩短产品开发周期、降低生产成本,具有较大的市场实用价值.