半球谐振子振动特性批量化测试技术

半球谐振子是半球谐振陀螺的核心部件,其振动性能测试贯穿生产加工、调平和装配整个过程,是半球谐振陀螺制造必不可少的环节,特别是对于高精度半球谐振陀螺,其谐振子具备高Q值低频率裂解的特性,需要高效率、批量化的测试手段,以满足半球谐振陀螺批量生产的需求。为解决谐振子批量化测试问题,首先,介绍了半球谐振子的工作原理,仿真分析了谐振子振动特性和表征方法;其次,针对半球谐振陀螺谐振子振动特性测试问题,提出了基于波动特性原理的振动特性测试方法;最后,根据所提出的振动特性的测试方法,设计了单腔室多工位谐振子振动特性批量化测试平台和工艺,采用激光测振仪进行振动信号的采集,完成了谐振子振动特性的检测,极大地提高了测试效率,满足半球谐振陀螺批量生产的要求。

基于Winform的红外探测器定量化测试系统设计

为提高红外探测器件在长周期测试中的定量化、自动化程度,提出了一套红外探测器长周期定量化测试软件。在.NET Framework环境下,基于Winform技术进行可视化的系统开发实现了对OpenVPX机箱数据传输与遥测,及对外围硬件设备的自动化调度工作,并提出一种新的方法自动化表征红外探测器稳定性,能将红外探测器响应率、非均匀性等复杂性能参数自动绘图展示。

高中生数学思辨量化测试卷的开发研究

数学思辨就是对数学问题进行分析、推理、评价、判断等数学活动。根据它所包含的三大层面共12个核心要素——分析层面(包括背景情境、前设条件、应用方式与认识分歧)、推理层面(包括严谨周密、归纳演绎、归纳演绎与类比拓展)、表达层面(包括目标意识、结构意识、模型意识和化归意识)编制了"高中生数学思辨量化测试卷"。

批量化微加速度计综合测试平台设计

为了实现微加速度传感器的批量标定,能够更加方便地进行多个传感器的性能测试。基于SolidWorks软件平台设计了一种可一次进行多只传感器综合测试装置。该装置可分别进行翻转测试和振动测试,并且能够实现传感器测试夹具与测试平台的自动结合与分离。通过对该装置测得的加速度计参数和原厂标定的加速度计参数对比,表明所设计测试平台的测试结果可靠。

论口译测试模式和口译测试量化评估

从口译现场性、即席性、限时性和交互性的特点出发,对近几年国内译界在口译测试方面的研究成果进行了简要的梳理和总结。以Gile、梅德明和林郁如等人对口译员知识结构的论述为基础,本文将口译员知识结构公式拓展为K I=KL+EK+S(P+PA)+P。通过对陈菁教授《交际法原则指导下的口译测试的具体操作》一文的借鉴,并结合笔者自身参加口译资格认证考试经历,本文探讨了口译测试应该采取的模式;并且以口译员知识结构拓展公式KI=KL+EK+S(P+PA)+P为基础,设定了口译测试量化评估表,以期对口译测试理论和口译测试具体操作获得客观而科学的深入认识。

多媒体环境下推拿手法技能测试量化分析与探析

在《推拿学基础》手法技能考核方面,通过目测、机测和体测相结合来判定最后的实训测试成绩。通过对两组12个班《推拿学基础》成绩的对比分析,应用组各项测试成绩、总成绩60分以上均优于传统组,应用组85分以上成绩、70分以上成绩与传统组区别不明显。运用多媒体技术进行实训教学,能明显提高低成绩学生实训技能的学习成绩,对高成绩学生和中等以上成绩学生的提高效果不明显。

适应于组网卫星的数字化及自动化测试技术研究

随着各类卫星星座计划的提出和部署,航天卫星数量的逐步增加,传统的卫星研制模式已逐渐不能满足卫星快速发射需求,为缩短卫星研制周期,卫星批量化、自动化测试手段逐渐成为新形势下卫星研制的关键一环;面向当前微小卫星高密度快速组网应用的需求,结合批产化卫星技术特点,研究了一种适用于组网卫星的数字化和自动化测试技术;对卫星综合测试系统架构进行优化,可满足多星批量化及并行测试;在卫星综合测试系统中增加自动化测试功能,可通过在线配置自动化序列实现卫星自动化测试;研发了一种数字卫星仿真测试平台,可用于卫星单机产品齐套前整星功能开发、测试等;克服了传统卫星研制周期长、测试过程数据判读和数据处理难度大以及重复性工作较多的缺陷。

氮气辐射强度的激波管测量与验证

超高速飞行器的热防护设计必须考虑激波层内高温气体发射与吸收的辐射能量,需要有效的辐射加热评估手段。相应飞行条件下的光谱辐射强度地面实验测量是验证数值模型和方法、理解高焓流动的重要手段。基于燃烧驱动激波管,发展辐射强度标定技术,针对富氮气环境,开展高温气体光谱辐射强度的高分辨定量化测试,掌握辐射特征,为数值验证提供基础数据。实验获得了激波速度5.70和6.20km/s条件下的气体光谱辐射强度精细结构,数据表明激波波后的非平衡过程对辐射强度存在很大影响。通过求解耦合化学反应动力学模型的Navier-Stokes方程和辐射特性模型,得到对应实验条件下的流场参数和辐射强度,计算结果和实验数据符合很好,验证了数值模拟方法。

矿山救援体能训练方案研究

本文研究了矿山救援体能训练的基本原理,从体能指标体系、体能指标标准、运动处方库、体能指标量化方案等方面对其进行了系统分析。针对某救护大队队员身体机能、柔韧性素质、耐力素质等方面的要求,设计训练方案,进行实证分析。

嫦娥四号探测器推进系统设计特点与验证

嫦娥四号探测器推进系统在充分继承嫦娥三号探测器的技术方案基础上,在发动机精确控制和高精度变推力、轨道控制管路超压管理、月面高可靠推进剂钝化、气瓶在轨提高裕度和发动机量化极性测试方面进行了优化设计,并通过了地面试验和在轨飞行试验的充分验证.结果表明:嫦娥四号探测器推进系统完成了在轨飞行全部姿态控制和轨道控制任务,取得的发动机推力精确控制和高精度变推力等技术成果可应用于其他探测器.

温度、流速对中国蛤蜊吐沙净化的影响及效果评价方法研究

本研究在实验室条件下,以定量化口感测试和解剖法为评价方法,探讨不同温度和水流流速对中国蛤蜊吐沙净化的影响,并比较分析了两种评价方法可行性。实验设定了4个温度梯度分别为14、18、22、26℃和5个流速梯度分别为20、40、80、160、320 L/h,结果表明不同温度和流速对吐沙净化的影响不同,14℃和18℃时,流速对吐沙净化无显著性影响(P>0.05),22℃和26℃时,流速对吐沙净化有显著性影响(P<0.05);14℃时,各流速的净化效果均不理想,18、22和26℃时,流速40 L/h下吐沙4~8 h可达到较好净化效果。2种评价方法比较的结果表明,定量化口感测试评价方法能够较为准确地反映贝类泥沙净化效果,可以作为贝类泥沙净化效果的评价方法;通过解剖法获得贝类体内残余泥沙进行粒径分析,易受到非泥沙颗粒物的干扰,不能准确地反映贝类体内泥沙粒径与含量,采用该方法作为吐沙净化评价方法时应做进一步优化。

Effects of trace element and purification on properties of AZ80 magnesium allo

The effects of trace element Fe on the corrosion behavior of AZ80 magnesium alloy were investigated by salt spray test and electrochemical measurements.The results show that the corrosion rate decreases with decreasing the trace element Fe content in an approximately linear relation even though the amount of trace element Fe reduces to 0.000 2%(mass fraction).The electrochemical measurements show that the corrosion potential(φcorr)of the alloy with lower trace element Fe content shifts to less negative value.It is suggested that the control trace element by purification is an effective way to enhance the corrosion resistance of AZ80 magnesium alloy.

Evaluating the Performances of GAMIL1.0 and GAMIL2.0 during TWP-ICE with CAPT

CAPT and Atmospheric （Climate Change Prediction Radiation Measurement Program Program （CCPP-ARM） Parameterization Testbed） has been a valu- able tool to assess climate models in recent years, and the Tropical Warm Pool-International Cloud Experiment （TWP-ICE） has collected comprehensive measurements to verify its physical parameterizations. The present study evaluates the performances of the two GAMIL （grid-point atmospheric model of lAP LASG） versions during TWP-ICE using CAPT. The results indicate that GAMIL2.0 reproduced better shifts of clouds and rainfall during three distinct monsoon phases than GAMIL1.0, although both of them simulated the large-scale dynamical states well, which are mainly attributable to the different convective parameterizations.

Evaluation of surface textures and skid resistance of pervious concrete pavement

Surface textures had long been recognized as primary factors to provide the skid resistance on pavements; however, no measurement of skid resistance on pervious concrete pavement with various surface texture parameters had been made. Fractal geometry was introduced in the present work to accurately simulate transect contour curves of pervious concrete specimens through fractal interpolation. It is proved that its fractal dimension (D) can be adopted to measure the skid resistance on pervious concrete pavement, overcoming the shortcomings of both macrotexture depth (DT ) and British portable pendulum number (NBP). Combined with Fujikawa-Koike tire/road contact model, the optimization method of all surface textures was recommended for designing and constructing excellently skid-resistant and noise-absorptive pervious concrete pavement. In addition, evaluating of the abrasion process and attenuation of the surface textures on concrete pavement slabs was also the focus of this work based on accelerated abrasion test. Results show that the surface textures on pervious concrete pavement slabs is extremely durable, compared to those on conventional grooved or exposed aggregate concrete pavement slabs.

Use of Geophysical Techniques for the Localization of the Restricting Zones of Permeability in the Bottom of Basin： Forecasting the Zones of Clogging

Measurements of dielectric parameters followed by permeability tests are performed on soil samples of infiltration basin. The dielectric parameters are obtained by TDR （time domain reflectrometry） measurements from which it is found that the measurement of the permittivity, the electrical conductivity and the relaxation time of compacted soil allows the mapping of the values of the coefficient of permeability at the surface of an infiltration basin. With the distribution of the coefficient of permeability, the areas of water stagnation can be detected before the basin filling. The study proves that the TDR measurements for the detection of these zones can be used for the management of infiltration basins for sustainable working and their remediation can be undertaken before the rainy seasons.

Commercial Applications of Paraxylene Adsorbents RAX-2000A and RAX-3000

The RAX series paraxylene （PX） adsorbents RAX-2000A and RAX-3000, are developed by the Sinopec Re- search Institute of Petroleum Processing （RIPP） and manufactured by the Sinopec Catalyst Company. Performance test of RAX-2000A showed that the average purity of the PX product reached 99.81%, with an average PX yield of 98.6% per pass. The new generation of PX adsorbents, RAX-3000 not only retains most advantages of the adsorbent RAX-2000A, but also has higher selective adsorption capacity by at least 8%. The actual unit production capability of the adsorbent RAX- 3000 was increased by about 18%. The RAX series PX adsorbents exhibited good adaptability to unfavorable feedstock containing high ethyl benzene （EB） fraction besides their better mechanical strength. Preliminary test results indicated that compared to the adsorbent RAX-2000A, the A/Fa and D/F relating to the adsorbent RAX-3000 were notably decreased due to the hi^her selective adsorotion canacitv of the adsorbent RAX-3000.

Multi-environmental Evaluation of Triticale, Wheat and Barley Genotypes by GGE Biplot Analysis

The research was carried out with 9 triticale, 3 bread wheat, 3 durum wheat and 3 barley varieties and advanced lines in Tekirdag, Edime and Silivri locations during three years. In the study, the data obtained from combined variance analysis were performed and the significance of the differences between the averages was determined by LSD multiple comparison test. GGE biplot analysis and graphics were made by using the statistical package program. The genotypes G2 and G3 for thousand kernel weight, genotype G1 for the heading time and test weight, genotypes G14 and G15 for the maturation time, number of spikelets per spike and grain weight per spike and G13 for the plant height, spike length and grain yield per hectare decare revealed the highest values. The genotypes G6, GS, G4, G14, G9, G8 and G7 gave lower values than the average in terms of grain yield, whereas the other genotypes gave higher values than the general average. According to biplot graphical results, while locations 1 and 8 were closely related, locations 9, 2 and 7 were positively related to these environments. Although the location 7 is slightly different from the other 4 locations, these 5 locations can be seen as a mega environment. Genotypes G12, G2, G3 and G10 for this mega-environment showed the best performances. According to the results of grain yields obtained from 9 different locations, the location 5 was the most discriminating area while the location 1 was the least discriminating. Location 2 was the best representative location, while locations 4 and 7 were with the lowest representation capability. The locations that are both descriptive and representative are good test locations for the selection of adapted genotypes. Test environments, such as location 8, with low ability to represent are useful for selecting genotypes that perform well in specific regions if the target environments can be subdivided into sub-environments.

Study on Test Methods for Flow Ability of Superfine Powder Extinguishing Agent

According to the physical and chemical characteristics of superfine powder extinguishing agent,three test methods are selected to measure the flow ability.By studying and comparing various test methods,apparatus and conditions,the optimum method and conditions to test flow property of superfine powder extinguishing agent are confirmed.

A new approach to test generation for combinational circuits

Aimed at the generation of high-quality test set in the shortest possible time, the test generation for combinational circuits （CC） based on the chaotic particle swarm optimization （CPSO） algorithm is presented according to the analysis of existent problems of CC test generation, and an appropriate CPSO algorithm model has been constructed. With the help of fault simulator, the test set of ISCAS＇ 85 benchmark CC is generated using the CPSO, and some techniques are introduced such as half-random generation, and simulation of undetected fauhs.with original test vector, and inverse test vector. Experimental results show that this algorithm can generate the same fault coverage and small-size test set in short time compared with other known similar methods, which proves that the proposed method is applicable and effective.

Effect of organic acid during the fermentation of vegetable

The technology of anaerobic digestion of sewage and solid wastes regains people＇s attention, mainly due to high price of fossil fuel nowadays in most recent years. The main topic for batch test is to study the inhibitory effect and boundary conditions of organic acid （propionic acid） to anaerobic digesters. High concentrations ofpropionic acid are achieved by direct dosage of the acid. As it is thought to be highly inhibitory to the digester, we are expecting that： （1） the production rate of methane declines and finally stops when the acid gradually accumulates; （2） the propionic acid will displace stronger inhibition under lower pH values. The results of the batch tests will assist engineers to better control anaerobic digesters and react to potential digester crises caused by propionic acid before it is too late.