The CCD instrument background of the SMILE SXI

The ESA and CAS SMILE mission orbit is highly elliptical and will pass through multiple radiation environments.The Soft X-ray Imager(SXI)instrument aboard has a radiation shutter door designed to close when the surrounding radiation flux is high.The shutter door will close when passing below an altitude threshold to protect against trapped particles in the Earth’s Van Allen Belts.Therefore,two radiation environments can be approximated based on the shutter door position:open and closed.The instrument background for the CCDs(Charge-Coupled Devices)that form the focal plane array of the SXI were evaluated for the two environments.Due to the correlation of the space environment with the solar cycle,the solar minima and maxima,the background was also evaluated at these two extremes.The results demonstrated that the highest instrument background will occur during solar minima due to the main contributing source being Galactic Cosmic Rays(GCRs).It was also found that the open background was highest for solar minima and that the closed background was highest during solar maxima.This is due to the radiation shutter door acting as a scattering centre and the changes in the energy flux distribution of the GCRs between the two solar extremes.

Research on the On-orbit Background of the Hard X-Ray Imager Onboard ASO-S

The space environment background of various particle fluxes of the Hard X-ray Imager(HXI), one of the payloads of the Advanced Space-based Solar Observatory(ASO-S) spacecraft, is investigated and presented. Different approaches are used to obtain the input information on various space environment particles(protons, alpha particles, electrons, positrons, neutrons, and photons). Some special regions(SAA and radiation belt) are also taken into account. The findings indicate that electrons are the primary background source in the radiation belt. Due to the large background flux generated by electrons, HXI cannot effectively observe solar flares in the radiation belt.Outside the radiation belt, primary protons and albedo photons are the main sources of background at low and high magnetic latitudes respectively. The statistical analysis of the flare and background spectra shows that the errors of the flare energy spectrum observation are mainly concentrated in the high energy band, and the detector still has a certain spectrum observation capability for flares of C-class and below in the low energy band of the non-radiation belt. The imaging observation of flares of C-class and below is significantly affected by the accuracy of background subtraction. The energy band with the best signal-to-noise ratio is from 10 to 50 ke V, which can be used to monitor the formation and class of flares.

Shared(epi)genomic background connecting neurodegenerative diseases and type 2 diabetes

The progressive aging of populations has resulted in an increased prevalence of chronic pathologies,especially of metabolic,neurodegenerative and movement disorders.In particular,type 2 diabetes(T2D),Alzheimer’s disease(AD)and Parkinson’s disease(PD)are among the most prevalent age-related,multifactorial pathologies that deserve particular attention,given their dramatic impact on patient quality of life,their economic and social burden as well the etiopathogenetic mechanisms,which may overlap in some cases.Indeed,the existence of common triggering factors reflects the contribution of mutual genetic,epigenetic and environmental features in the etiopathogenetic mechanisms underlying T2D and AD/PD.On this subject,this review will summarize the shared(epi)genomic features that characterize these complex pathologies.In particular,genetic variants and gene expression profiles associated with T2D and AD/PD will be discussed as possible contributors to determine the susceptibility and progression to these disorders.Moreover,potential shared epigenetic modifications and factors among T2D,AD and PD will also be illustrated.Overall,this review shows that findings from genomic studies still deserves further research to evaluate and identify genetic factors that directly contribute to the shared etiopathogenesis.Moreover,a common epigenetic background still needs to be investigated and characterized.The evidences discussed in this review underline the importance of integrating largescale(epi)genomic data with additional molecular information and clinical and social background in order to finely dissect the complex etiopathogenic networks that build up the“disease interactome”characterizing T2D,AD and PD.

Electromechanical instrument collaborative sharing system based on A/S mode

In this paper, we put forward a collaborative mode based on A/S mode to solve existing problems in the process of developing electromechanical instrument collaborative sharing system (EICSS). The mode architecture, working pattern and development flow of this system were described. The prototype system developed was applied to Lambda 900 Spectrometer in Chongqing University to realize electromechanical instrument networked sharing, and demonstrated desirable expansibility and felxibility to satisfy diverse demands of customers.

Human Comfort Instrument Design Based on Embedded

The traditional human comfort meter has the following defects: the interface is not uniform;the operation is cumbersome and complicated;the interface is unfriendly, and the stability and adaptability are poor. This paper presents a design scheme for human comfort instrument based on embedded system, using S3C2440 embedded development board and the sensors to collect the real-time temperature, relative humidity and wind speed data and to process the collecting data;then obtaining the human body comfort value according to the basic algorithm of human body comfort instrument;giving the human comfort conclusion according to the diastolic index range of human comfort, and showing the temperature and humidity, wind speed, comfort value and conclusion through writing the Qt graphical user interface program. At the same time, the human comfort instrument has the data storage function. The human comfort instrument is high in integration, strong in real time, high in sensitivity, stable and reliable, and it meets the development goals of the intelligent meteorological service, and meets the demand of the meteorological service that is closer to life, and it has broad development prospect.

Research on the Post-90s Patriotism Education under the General Background of Globalization

In this paper, we conduct research on the post-90s patriotism education under the general background of globalization. Patriotism refl ected the people’s deep feelings about their motherland, refl ects the personal to the dependence of the motherland, it is people for their homeland, racial and the cultural sense of belonging, identity, dignity and honor. It is a moral requirement of regulating the relationship between individuals and the motherland, the principle of political and legal norms, also is the core of the national spirit. Love the motherland’s great rivers as love oneself of the same fl esh and blood, love, brilliant culture of the basic motherland that love his own country constitutes the basic requirements of patriotism. Under this background, we propose our novel perspectives on post-90s patriotism education under the general background of globalization which is meaningful.

China's Medical Equipment and Instruments Industry

Great changes have taken place in China’s medical equipment and instruments industry since the launch of the reform. The industry has evolved a new structure consisting of various economic sectors.

National Instruments公司MXI-Express套件

National Instruments推出MXI-Express套件，用于对PXI和CompactPCI系统的PCIExpress控制。凭借每个通道每个方向250MB／s的专用带宽，PCIExpress可同时为高速和高通道数量应用提供高吞吐率。MXI-Express提供了到PXI系统110MB／s的真实持续带宽。MXI-Express改进的吞吐率使其适合于信号情报和混合信号测试之类的应用，包括通信、消费电子和军事／航空等行业。

基于中红外TDLAS的SF_(6)、H_(2)S背景下SO_(2)浓度检测

选择1300~1400cm-1波段作为SO_(2)检测波段,搭建了基于TDLAS技术的实验平台,采用纯SF6与5、25、50μL/L H_(2)S作为背景源,检测获取不同浓度SO_(2)的二次谐波峰值平均值。实验结果表明,在纯SF_(6)背景下,SO_(2)浓度与二次谐波峰值平均值的拟合优度为0.997,不同浓度SO_(2)实验气体验证拟合曲线最大误差为0.653μL/L。在5、25、50μL/L H_(2)S背景下,不同浓度SO_(2)实验气体验证拟合曲线最大误差分别为0.724μL/L、0.821μL/L、1.225μL/L,同时SO_(2)浓度与二次谐波峰值平均值的拟合优度分别达到0.997、0.996、0.995。

基于背景噪声层析成像反演上海及邻区S波速度结构

文中收集了上海及邻区58个宽频带流动地震台阵1a的连续背景噪声垂向数据,基于背景噪声互相关技术结合快速行进FMM成像方法,获得了上海及邻区5~30s周期范围内地壳及上地幔顶部的面波相速度结构。最后利用最小二乘线性迭代方法,反演得到了研究区下方5~30km深度的三维S波速度结构。结果显示:上海及邻区的S波速度结构呈现出一定的横向和纵向非均匀性特点。在5~10km深度的浅层及上地壳,速度异常值的分布与域内地形地貌及大型断裂的展布存在一定相关性,低速异常分布受湖-苏断裂的影响较大。在15~20km深度的中下地壳,速度异常以枫泾-川沙断裂为界,由苏北至杭州湾速度逐渐升高,上海地区沿枫泾-川沙断裂表现出明显的构造抬升形态。在25~30km深度范围内,速度异常分布反映下地壳及上地幔顶部呈现西深东浅的埋深状态。综合AA′、BB′、CC′3条纵剖面的结果,可得到以下结论:1)上海及邻区地下结构变化平缓,地壳整体西厚东薄,起伏呈西低东高、中间隆起的形态;2)速度异常及地震活动性与断裂带关系密切,低速异常与大型断裂伴生出现。地震分布具有依附低速体及在断裂带附近、沿速度分界线排列的特点。结合相关结果分析认为,域内以浅源地震为主可能是被断裂切割较破碎的中上地壳与稳定的下地壳之间的应力不均衡所致;3)常熟地区5~25km深度内的低速异常一直存在,推测常熟一带存在热物质上涌现象。

2024年新疆乌什M_(S)7.1地震数据产品及其分析

2024年1月23日,地处印度洋板块和欧亚板块碰撞前沿地带的新疆乌什地区发生M_(S)7.1地震。地震发生后,中国地震台网中心立即启动应急响应,国家测震台网中心快速产出地震数据产品,为地震发震构造研究、震源区地震危险性评估提供基础数据。基于中国地震台网资料,采用双差定位方法,对新疆乌什地震及主震后38天内3487次余震进行重新定位。定位结果显示,主震震中位置为(41.28°N,78.62°E),震源深度为31 km,余震序列呈NE-SW向线性展布,扩展范围约80 km,震源深度优势分布在30 km以浅范围内,发震断层倾向NW。同时,基于所得地震定位和前人震源机制解结果,采用PSGRN/PSCMP软件包,计算本次地震不同深度上的库仑应力分布,根据结果分析表明,主震发生使得主震周边区域进入应力卸载状态,并分析了主震对余震发生的触发作用。最后,使用国家地震烈度速报与预警工程站网数据计算本次地震仪器烈度,显示最大烈度值为Ⅸ度,烈度区域小,且集中在主震NEE方向。基于上述结果,结合周边地质构造,认为此次新疆乌什M_(S)7.1地震事件为一次兼具走滑性质的逆冲型地震。

Background Relations between China's in surance companies and banks

DForalongtime,China'sinsurancecompanieshavefollowedtheexampleofthebanks.Whenthecentralbankreducedinterestrates,insurancecompanies,lifeinsurancecompaniesinparticular,sawanincreasingriskintheirbusiness.AccordingtotheinsuranceLawofChina,thecapitalofCh...

基于B/S架构的计量公共服务平台设计与应用

该平台基于B/S架构,采用ASP.NET技术、C#语言和Oracle数据库,实现了计量器具全生命周期的信息化管理。平台包括计量器具管理、送检业务管理、计量器具统计、计量数据分析、计量信息推送等功能,具有实现计量数据互联互通、提高计量行政管理部门监管效率、提升企业产品质量等应用价值。

基于S变换的吸收衰减技术在含气储层预测中的应用研究

地层品质因子Q值反映了介质的吸收衰减特性,是检测气藏的重要参数。当研究区地质情况较复杂,存在如火成岩等高阻抗体时,难以区分强振幅是由含气还是高阻抗体引起。首先利用相似背景分离技术对地震资料进行预处理,去除与地层特征无关的信息;然后对叠前地震资料进行S变换,得到S域时频谱,再利用S域谱比法逐道求取频谱比斜率值;最后通过线性回归得到零偏移距地层Q值。该方法充分利用了叠前地震资料含有丰富的地层信息和S变换具有较高的时频分辨率等优点。将该方法应用于实际地震资料提取地层Q值,计算结果表明,在含气区Q值比较低,异常现象明显,在非含气区例如高阻抗体处Q值比较高,无异常现象,从而更真实地反应出地层的吸收特征,提高了含气储层的预测精度。

基于S变换的平方检测法测量电压闪变

为实现电压闪变的准确测量,提出了基于S变换的平方检测法电压闪变测量算法。介绍了S变换的基本原理,简化了平方检测法电压闪变的计算过程,给出了基于S变换的平方检测法闪变测量流程。应用S变换对电压闪变信号进行时频分析,由S变换的频域特性曲线求频谱计算闪变值,由S变换的高频频谱幅值和曲线得到电压闪变的起始、结束时刻,仿真结果证明算法的可行性与准确性。在此基础上研制基于虚拟仪器技术的电压闪变测量仪,给出了仪器的构成与主前面板。运行结果表明,仪器操作方便,测量可靠。

川西地区壳幔结构与汶川M_s8.0级地震的孕震背景

收集了四川数字地震台网记录的57个远震事件,并从宽频带数字化三分量地震记录中计算出了马尔康(MEK)、都江堰(YZP)、GP江(JJS)、江油(ZJG)、广元(YTS)、康定(GDS)、汉源(XJP)、雅安(MDS)、峨眉山(EMS)、沐川(WMP)、仁寿(YGD)、荣县(HMS)等12个台站下方的远震P波径向接收函数.另外,引入地震勘探中的动校正技术,将各台的接收函数校正到67°的参考震中距处,然后对接收函数进行叠加以增强信号,并把叠加接收函数作为台站下方的平均接收函数.最后,利用台站下的平均接收函数反演得到S波速度结构.反演结果表明:以锦屏山—龙门山断裂为界,其西侧地壳厚达70 km,而东侧仅为50 km左右Moho面在断裂下方形成了一个陡坎;川西地区的地壳速度结构与川中地区差异较大,主要表现在川西地区的中地壳存在厚度为8-22 km的低速层.在都江堰、雅安一带,低速层的厚度最大,其厚度在20-22 km之间,其上地壳为一个坚硬固体,在区域构造应力场作用下,形成了孕育大地震的构造环境.

云南壳幔S波速度结构与强震的构造背景

本文选取云南及周边65个台站记录到的47个地震事件,利用相匹配滤波技术分离出了基阶Rayleigh面波信号.选取与震中处于同一大圆弧上的两个台站,利用双台格林函数法获取了台间相速度频散,频散的周期范围在10～80 s之间.从2000个波形记录中提取了152个台站对之间的相速度频散,最后,利用台间的相速度频散反演得到云南地区0～200km深度范围内的S波速度结构.结果表明:云南地区地壳厚度整体上呈南北向变化趋势,从南部的30 km变化到北部的60 km.在局部地区Moho面呈现出隆起和凹陷,基本上呈"一隆两凹"的特征.另外,滇西地区大致以红河断裂为界,其两侧的岩石圈结构存在明显的差异.西侧从70 km深处开始,滇缅泰块体上的保山、畹町、沧源、思茅一带大范围内均为低速区,并且一直延伸到120 km深处.而红河断裂东侧的滇中块体,只有在康滇古隆起区存在上地幔低速区,其余大部分地区上地幔S波速度在4.4～4.6 km/s之间.

LabWindows/CVI的虚拟仪器远程网络控制系统设计

针对武器系统测试和工业企业生产等大型多类型参数测量具有实时性、复杂性和危险性等特点,提出一种以L abW indow s/CV I作为系统开发平台,利用C/S模式,采用TCP/IP协议,组建虚拟仪器远程网络测控系统的方案。此方案在大型多类型参数测量有广阔的应用前景。

EA-MS测试过程中添加助燃剂的影响效应研究

利用元素分析-质谱仪(EA-MS)联用系统,探讨对高C/N植物样品测试过程中添加助燃剂对样品氮同位素比值、氮含量和仪器本底的影响。在植物样品中添加CuO或者V2O5,测定的氮同位素组成结果表明:添加助燃剂导致样品测试的结果偏差更小,这与测试过程中植物样品能够完全燃烧有关;添加助燃剂使测试的氮含量高于不添加助燃剂的情况,同时仪器本底也能迅速降低,说明助燃剂的添加有助于样品在瞬间燃烧,因此使测试结果更为精确;不同助燃剂的添加对植物氮同位素比值结果的影响程度不同,与不添加助燃剂的情况相比,CuO的添加使得同位素比值偏正,而V2O5的添加结果不具有规律性;在样品中添加CuO助燃剂(和植物样品以4∶1的质量比混合),样品测试的同位素值偏差最小,测试结果也更加可信,样品本底可以达到连续做样而不影响测定下一样品的氮同位素组成。该方法简单、有效、投入较少,可以用于难以反应的样品分析中。