ASCA observation of Unusually X-ray Hard Radio Quiet QSO Kaz 102

We have observed a radio-quiet QSO Kaz 102 (z=0.136) with ASCA as a part of our program of complete spectral characterization of hard X-ray selected AGNs. We found that Kaz 102 shows unusual spectral properties. A simple power-law with absorption in our galaxy gave a satisfactory description of the spectrum. However, it showed a very hard photon index of Gamma=1.0 with no sign of deep absorption or a prominent spectral feature. We further explored the Compton reflection with Fe K-alpha line and warm absorber models for hardening the spectrum. Both gave statistically satisfactory fits. However, the Compton reflection model requires a very low metal abundance (0.03-0.07 in solar units).The warm absorber model with no direct component is preferred and gave a very high ionization parameter xi=200. If this is the case, the values of xi, warm absorber column density, and variability over about 10 years may suggest that the warm absorber resides in the broad-line region and crosses the line of sight to the central X-ray source.Comment: 5 pages, 5 figures. Accepted to Publication of the Astronomical Society of Japan (Letters

Research on management and scheduling of resource component database based on XML technology

XMl是一种可扩展的文本标记语言,可以用来标记数据、定义数据类型,XMl技术独立于平台,特别适合于环境各异的分布式组件之间数据交互。因此采用XMl技术实现异质资源组件库的构建,为了实现对接入资源进行有效管理和操作,提出基于关系型的数据库管理与操作技术。XML is an extensible markup language that tags data and defines data type.XML is a platform-independent technology,particularly suitable for data communication between distributed diversity environment components.So XML interface technology is used to create a wireless resource component database.In order to efficiently utilize these accessed resources,a relational database management system and its scheduling technique are presented.国家863项目资助(2010ZX03005003

Channel Capacity Analysis of Distributed MIMO Systems in Cabin

采用自主搭建的信道测量平台测得了机舱环境下分布式MIMO系统的信道冲击响应矩阵。根据实测的信道矩阵分别计算了4种具有不同收发天线数目的分布式MIMO系统的信道容量。为了便于比较,SISO系统的信道容量也通过实测数据进行了计算。计算结果表明:在机舱环境下,采用分布式MIMO系统和采用SISO系统相比能够显著提高系统信道容量,说明分布式MIMO系统可以充分满足未来机舱内无线通信高速率数据传输的需求。With the self-built channel measurement platform,the channel matrix of in-cabin distributed MIMO system is measured.The channel capacity of 4 different distributed MIMO systems and also the channel capacity of one SISO system are calculated from the measured data.The calculation results show that as compared with one SISO system,the distributed MIMO system could significantly raise the capacity gain in the aircraft cabin environment,and thus could fully satisfy the requirements of high data-rate delivery for future in-cabin wireless communication.国家科技重大专项课题(No.2009ZX03002-002);国家重点基础研究发展规划项目资助(No.2007CB310608);国家863项目资助(No.2009AA011501);国家科技合作项目(No.2010DFB10410);清华-高通联合研究计划资助项目;长江学者和创新团队发展计划资助项目;中国博士后科学基

A case of uretero-aortic fistula

骨盤内容除去術及び右下腹部での二連尿管皮膚造瘻術が行われた直腸癌の69歳男で, 尿管瘻狭窄の為にdouble J stentの二尿管内持続留置を必要とした.術後2年にdouble Jカテーテル交換中に大出血が起こった.閉塞性尿管造影上, 左尿管と大動脈との交差点で尿管大動脈瘻が認められた.大動脈瘻を縫合閉鎖し, 瘻の近位側で左尿管を結紮し, 左経皮的腎瘻術を造設した.4年余の現在, 再発なく健在であるWe report a case of uretero-aortic fistula. A 69-year-old man with rectal cancer underwent a pelvic exenteration and a double--barreled cutaneous ureterostomy in the right lower abdomen. Stomal stenosis necessitated continuous indwelling of double J stents in the two ureters. Two years postoperatively, massive bleeding occurred during exchange of double J catheters. Occlusive ureterogram demonstrated a uretero-aortic fistula at the crosspoint between the left ureter and the aorta. The surgical repair consisted of closure of the aortic fistula, ligation of the left ureter proximal to the fistula and percutaneous left nephrostomy

单边螺栓T型钢连接梁柱节点地震损伤性能评估

随着装配式钢结构在建筑工程领域的应用日益广泛，单边螺栓连接作为一种高效、便捷的连接方式，逐渐受到业界的青睐。H型钢梁、方钢管柱通过T型钢连接件和单边螺栓连接技术形成新型装配式钢框架结构，梁柱节点作为整个框架体系的核心，其抗震性能对整体结构的影响至关重要。为评估单边螺栓T型钢连接梁柱节点在地震过程中的损伤情况，开展了4种不同刚度单边螺栓T型钢连接梁柱节点的拟静力试验。通过试验，获得了单边螺栓T型钢连接梁柱节点的破坏模式、滞回性能和初始转动刚度，分析了不同刚度的T型钢连接件对梁柱节点的破坏模式、抗弯承载能力和转动刚度退化的影响。采用考虑残余变形累积损伤修正的Park-Ang损伤指数模型研究了试验中节点的损伤演化规律，结果表明：所提出的地震损伤模型能够较好地反映单边螺栓T型钢连接梁柱节点的损伤演化过程与破坏程度，为该类梁柱连接节点的优化设计和安全评估提供了理论依据和实践经验

Measurement of integrated luminosity of data collected at 3.773 GeV by BESIII from 2021 to 2024

We present a measurement of the integrated luminosity e+e- of collision data collected by the BESIII detector at the BEPCII collider at a center-of-mass energy of Ecm = 3.773 GeV. The integrated luminosities of the datasets taken from December 2021 to June 2022, from November 2022 to June 2023, and from October 2023 to February 2024 were determined to be 4.995±0.019 fb-1, 8.157±0.031 fb-1, and 4.191±0.016 fb-1, respectively, by analyzing large angle Bhabha scattering events. The uncertainties are dominated by systematic effects, and the statistical uncertainties are negligible. Our results provide essential input for future analyses and precision measurements

Determination of the number of ψ(3686) events taken at BESIII

The number of ψ(3686) events collected by the BESIII detector during the 2021 run period is determined to be (2259.3±11.1)×106 by counting inclusive ψ(3686) hadronic events. The uncertainty is systematic and the statistical uncertainty is negligible. Meanwhile, the numbers of ψ(3686) events collected during the 2009 and 2012 run periods are updated to be (107.7±0.6)×106 and (345.4±2.6)×106, respectively. Both numbers are consistent with the previous measurements within one standard deviation. The total number of ψ(3686) events in the three data samples is (2712.4±14.3)×10^