|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | 城市基础地理数据库更新机制研究显示文摘从GIS和CAD两种数据模型出发,提出基于CheckOut/In的数据更新机制,为了充分利用CAD制图功能,在CAD中将新测数据插入到更新区域,然后写入子数据库,同时父数据库自动检测并做出响应。实际应用证明该研究成果能提高基础地理数据库的更新速度。 | 刘德儿 闾国年 兰小机 王永君 | 2010 | 大地测量与地球动力学2010，30，1： | 18 |
| 2 | Reverse reconciliation for continuous variable quantum key distribution显示文摘An efficient and practical post-processing technique based on reverse reconciliation for continuous variable quantum key distribution is proposed and simulated with low-density parity check (LDPC) codes. MultiLevel Coding/ MultiStage Decoding, which fully utilizes optimization technique such as vector quantization and iterative decoding and the optimal channel coding most close to the Shannon limit, was used to realize efficient reverse reconciliation algorithm. Simulation results showed that the proposed method can improve the secure key distribution rate to 2.2 kb/s and the coding efficiency to 0.89 over 20 km in single-mode optical fiber. Moreover, there still is room for much improvement. | LU ZhiXin 1,2 , YU Li 1,2 , LI Kang 1,2 , LIU BingCan 1,2,3 , LIN JianGui 1,2 , JIAO RongZhen 1,2 & YANG BoJun 1,21 School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, China 2 Key Laboratory of Information Photonics and Optical Communication, Ministry of Education, Beijing University of Posts and Telecommunications, Beijing 100876, China 3 Department of Fundamental Courses, Academy of Armored Force Engineering, Beijing 100072, China | 2010 | Science China(Physics,Mechanics & Astronomy)2010，53，1： | 12 |
| 3 | 非晶硅电子射野影像系统与ArcCHECK在直肠癌容积旋转调强剂量验证中的应用显示文摘目的:比较非晶硅电子射野影像系统(a-Si EPID)与旋转照射剂量验证仪器(Arc CHECK)在直肠癌容积旋转调强(VMAT)剂量验证中的应用。方法:随机选取20例直肠癌VMAT病例,分别设计a-Si EPID与Arc CHECK的验证计划,并在UNIQUE加速器上进行验证。采用γ分析方法(3 mm,3%)比较两种不同验证工具的相对剂量与绝对剂量通过率、X和Y方向的profile。结果:Arc CHECK的绝对剂量通过率为(97.73±1.98)%,相对剂量通过率为(96.96±2.34)%;aSi EPID的绝对剂量通过率为(97.58±1.88)%,相对剂量通过率为(98.13±1.47)%。X、Y方向的profile理论值与实测值很相近,理论剂量分布图与实测计算剂量分布图在高低剂量点分布上重合度较高。结论:Arc CHECK和a-Si EPID的验证结果在剂量学上没有明显差异,两者在直肠癌VMAT剂量验证中都是可行的,但a-Si EPID操作简单、使用方便、显示剂量即时,可以更便捷地进行VMAT剂量验证。 | 黎旦 宾石珍 程品晶 单冬勇 成树林 张俊俊 | 2016 | 中国医学物理学杂志2016，33，7： | 9 |
| 4 | Arc CHECK在乳腺癌螺旋断层放疗计划剂量验证中的应用显示文摘目的:探讨Arc CHECK旋转调强剂量验证系统在乳腺癌螺旋断层放疗(Helical Tomotherapy,HT)计划剂量验证中的应用可行性。方法:将20例乳腺癌HT计划移植到Arc CHECK系统进行调强放射治疗(Intensity Modulated Radiotherapy,IMRT)计划剂量验证,得到的验证结果与HT计划在其模体中计算获得的平面剂量分布进行比较。剂量验证结果分析采用Gamma分析法,并采用多种标准进行评估。结果:20例乳腺癌病例在阈值水平(Threshold,TH)为10%,3%/3 mm、3%/4 mm、3%/5 mm的γ通过率超过90%的病例数分别占总例数的40%、55%、80%;TH水平为15%,3%/3 mm、3%/4 mm、3%/5 mm的γ通过率超过90%的比例分别为40%、55%、85%,TH水平为20%,3%/3 mm、3%/4mm、3%/5 mm的γ通过率超过90%的比例分别为40%、60%、85%。当评估标准为5%/5 mm时,γ通过率超过90%的比例为100%。靶区剂量均匀性指数(HI),瘤床的同步追量,靶区边界内缩至皮缘下及淋巴结情况对γ通过率无影响(P>0.05)。模体中心偏离x负方向大于4 cm的11例病例中,仅有2例验证结果达到3%/3 mm(TH=10),比例为18%;模体中心偏离x正方向大于4 cm的9例病例中,有6例验证结果达到3%/3 mm(TH=10),比例为66.7%。结论:Arc CHECK旋转调强验证系统可用于乳腺癌HT计划剂量验证,有效地简化了HT剂量验证的流程,但验证模体中心与机器等中心偏移关系对验证通过率的影响仍需配合第三方验证系统作进一步研究。 | 张晋建 黎静 文婷 叶柳清 李志强 侯友贤 贾峻嵩 陈静 王彦 钟毓 | 2015 | 中国医学物理学杂志2015，32，2： | 9 |
| 5 | CRC循环冗余校验码并行算法的FPGA实现显示文摘CRC循环冗余校验是数字数据通信中最常用的差错控制编码方法之一。在多种通信协议的帧结构中有一个16位或32位的FCS(FrameCheckSequence),就是利用CRC编码保证数据帧的无误传输。本文阐述了CRC循环冗余校验码基本原理,根据实际系统需要,建立了并行处理算法的数学模型,并且在FPGA芯片中实现了该并行算法。 | 石林艳 罗汉文 | 2005 | 有线电视技术2005，12，8： | 8 |
| 6 | Design of Irregular QC-LDPC Code Based Multi-Level Coded Modulation Scheme for High Speed Optical Communication Systems显示文摘In this paper, we focus on the design of irregular QC-LDPC code based multi-level coded modulation(MLCM) scheme by jointly optimizing the component code rate and the degree distribution of the irregular QC-LDPC component code. Firstly, the sub-channel capacities of MLCM systems is analyzed and discussed, based on which the optimal component code rate can be obtained. Secondly, an extrinsic information transfer chart based two-stage searching algorithm is proposed to find the good irregular QC-LDPC code ensembles with optimal component code rates for their corresponding sub-channels. Finally, by constructing the irregular QC-LDPC component codes from the designed ensembles with the aim of possibly enlarging the girth and reducing the number of the shortest cycles, the designed irregular QC-LDPC code based 16QAM and 64QAM MLCM systems can achieve 0.4 dB and 1.2 dB net coding gain, respectively, compared with the recently proposed regular QC-LDPC code based 16QAM and 64QAM MLCM systems. | Liqian Wang Dongdong Wang Yongjing Ni Xue Chen Midou Cui Fu Yang | 2019 | China Communications2019，16，5： | 7 |
| 7 | Check list表单在ICU连续性血液净化患者上机管理中的应用显示文摘目的:探讨Check list表单在ICU连续性血液净化患者上机管理中的应用效果。方法:选择2015年1~6月行床旁连续性血液净化50例患者作为对照组,采用传统流程;将7~12月行床旁连续性血液净化治疗66例患者为观察组,使用check list表单进行用物准备、管路安装及上机过程的管理。比较两组行血液净化时用物准备和管路安装时间、正确率,上机过程规范流程执行率,医生对护理工作的满意度的差异。结果:观察组较对照组用物准备和管路安装时间明显缩短、正确率明显上升,提高了规范操作的依从性(P<0.01),医生对护理工作的满意度观察组明显高于对照组(P<0.01)。结论:床旁连续性血液净化过程中使用check list表单,缩短了护士用物准备和管路安装的时间,提高了工作效率,减少了安全隐患,保证了患者的安全,提高了规范上机操作流程的依从性,提高医生对护理工作的满意度。 | 胡海平 | 2017 | 齐鲁护理杂志2017，23，7： | 7 |
| 8 | 关于大学生生活事件的调查报告显示文摘本研究运用青少年生活事件量表(Adolescent Self-Rating Life Events Check List,ASLEC)为测查工具,采用问卷调查的形式,对福建省部分高校的278名在校大学生进行现状调查。调查被试一年中,生活事件发生频率居于前三位的分别是考试失败或不理想、学习负担重及被人误会或错怪。本研究得出的结论为:应激事件尤其是负性生活事件对大学生的心理健康有着重要影响,提高大学生的心理承受能力,应对负性生活事件的不良影响有重要意义。 | 黄静 | 2008 | 法制与社会2008，，6： | 7 |
| 9 | Soil erosion and sediment interception by check dams in a watershed for an extreme rainstorm on the Loess Plateau,China显示文摘The magnitude of soil erosion and sediment load reduction efficiency of check dams under extreme rainstorms is a long-standing concern.The current paper aims to use check dams to deduce the amount of soil erosion under extreme rainstorms in a watershed and to identify the difference in sediment interception efficiency of different types of check dams.Based on the sediment deposition at 12 check dams with 100% sediment interception efficiency and sub-catchment clustering by taking 12 damcontrolled catchments as clustering criteria,the amount of soil erosion resulting from an extreme rainstorm event on July 26,2017(named '7·26' extreme rainstorm) was estimated in the Chabagou watershed in the hill and gully region of the Loess Plateau.The differences in the sediment interception efficiency among the check dams in the watershed were analyzed according to field observations at 17 check dams.The results show that the average erosion intensity under the '7-26' extreme rainstorm was approximately 2.03×10~4 t/km^2,which was 5 times that in the second largest erosive rainfall in 2017(4.15×10~3 t/km^2) and 11-384 times that for storms in 2018(0.53×10~2 t/km^2-1.81×10~3 t/km^2).Under the '7-26' extreme rainstorm,the amount of soil erosion in the Chabagou watershed above the Caoping hydrological station was 4.20 × 106 t.The sediment interception efficiency of the check dams with drainage canals(including the destroyed check dams) and with drainage culverts was 6.48 and 39.49%,respectively.The total actual sediment amount trapped by the check dams was 1.11 × 106 t,accounting for 26.36% of the total amount of soil erosion.In contrast,3.09×106 t of sediment were input to the downstream channel,and the sediment deposition in the channel was 2.23×10~6 t,accounting for 53.15%of the total amount of soil erosion.The amount of sediment transport at the hydrological station was8.60×10~5 t.The Sediment Delivery Ratio(SDR) under the '7·26' extreme rainstorm was 0.21.The results indicated that the amount of soil erosion was huge,and the sediment interception efficiency of the check dams was greatly reduced under extreme rainstorms.It is necessary to strengthen the management and construction technology standards of check dams to improve the sediment interception efficiency and flood safety in the watershed. | Leichao Bai Nan Wang Juying Jiao Yixian Chen Bingzhe Tang Haolin Wang Yulan Chen Xiqin Yan Zhijie Wang | 2020 | International Journal of Sediment Research2020，35，4： | 7 |
| 10 | 层次分析法在安全检查表中的运用显示文摘 | 贾宏禹 周思柱 李美求 | 2006 | 建筑安全2006，21，2： | 5 |
| 11 | Surrogate markers of insulin resistance:A review显示文摘Insulin resistance is a hallmark of obesity,diabetes,and cardiovascular diseases,and leads to many of the abnormalities associated with metabolic syndrome. Our understanding of insulin resistance has improved tremendously over the years,but certain aspects of its estimation still remain elusive to researchers and clinicians.The quantitative assessment of insulin sensitivity is not routinely used during biochemical investigations for diagnostic purposes,but the emerging importance of insulin resistance has led to its wider application research studies.Evaluation of a number of clinical states where insulin sensitivity is compromised calls for assessment of insulin resistance. Insulin resistance is increasingly being assessed in various disease conditions where it aids in examining their pathogenesis,etiology and consequences. The hyperinsulinemic euglycemic glucose clamp is the gold standard method for the determination of insulin sensitivity,but is impractical as it is labor-and time-intensive.A number of surrogate indices have therefore been employed to simplify and improve the determination of insulin resistance.The object of this review is to highlight various aspects and methodologies for current and upcoming measures ofinsulin sensitivity/resistance.In-depth knowledge of these markers will help in better understanding and exploitation of the condition. | Bhawna Singh Alpana Saxena | 2010 | World Journal of Diabetes2010，1，2： | 5 |
| 12 | 单元测试的自动化实践显示文摘介绍了单元测试的概念以及自动化的方法,并结合C语言测试框架Check的具体应用进行了分析。 | 吴高峡 王芙蓉 | 2007 | 计算机与数字工程2007，35，1： | 5 |
| 13 | 上海市体检人群SCL-90评定结果分析显示文摘目的分析上海市体检人群症状自评量表(SCL-90)各因子得分情况,了解其心理健康状况,为心理健康指导提供依据。方法采用SCL-90对来我院健康体检的人群进行心理测量,比较不同性别、婚姻、年龄、学历之间的差异。结果本研究群体SCL-90各因子得分均低于常模(P<0.05);女性的躯体化、强迫症状、抑郁、焦虑、恐怖得分高于男性(P<0.05);除躯体化外,其他因子得分在不同婚姻状况、不同年龄组人群之间的差异均具有统计学意义(P<0.05);除偏执外,其他因子不同学历人群间得分的差异均具有统计学意义(P<0.05)。结论该体检人群的心理健康状况良好,但应注重女性、未婚、低年龄、低学历人群心理健康教育。 | 刘梅 姜涌斌 周锋 万晋迪 | 2014 | 中国疗养医学2014，23，6： | 5 |
| 14 | Check list表单在夜班护理组ICU连续性血液净化患者上机管理中的应用效果分析显示文摘目的分析Check list表单在夜班护理组ICU连续性血液净化患者上机管理中的应用效果。方法选取2018年3月~2018年11月期间我院ICU收治的88例连续性血液净化患者,采取随机分组方式将其分为对照组和观察组,每组各44例,对照组采取传统流程管理,观察组采取Check list表单进行管理,观察两组患者护理满意度及安装正确率。结果与对照组错误率(65.91%)相比,观察组错误率(11.36%)更低,差异具有统计学意义(P<0.05)。结论在ICU连续性血液净化患者中实施Check list表单管理能有效减少差错事件,减少护患矛盾。 | 阿布都哈德.艾白迪拉 阿孜古丽.阿不都哈的 米娜瓦尔.麦麦提 | 2018 | 实用临床护理学电子杂志2018，3，51： | 4 |
| 15 | 综合档案在等级医院评审中的作用显示文摘为促进医院自身建设和管理,提高医疗质量,保证医疗安全,改善医疗服务,国家卫生健康委员会在全国范围内开展等级医院评审,主要是对医院管理水平、医疗技术水平和医疗服务水平进行评审,评审方法之一是查阅评审条款是否遵循PDCA(P即plan,D即do,C即check,A即action)循环原理。仅有P,即仅有制度或规章或流程,未执行,不合格;有PD,即有机制且有效执行,合格;有PDC,即有监管,有结果,良好;有PDCA,即有持续改进,成效良好,优秀。 | 姚春燕 | 2019 | 中国档案2019，，7： | 4 |
| 16 | PDCA循环理论在内部审计中应用显示文摘近年来人民银行系统在内部审计转型和深化发展中探索实践,内部审计关注绩效、服务治理、增加价值取得初步成效.PDCA是英文单词Plan(计划)、Do(执行)、Check(检查)和Action(纠正)的第一个字母,因而被称为PDCA循环(亦称戴明循环).PDCA循环的提出对质量管理有着较强的理论指导意义.本文引入PDCA循环理论,从促进组织增加价值的绩效视角,探索进一步深化人民银行内部审计转型、促进组织价值持续提升的路径. | 陈西果 | 2015 | 新会计2015，，1： | 3 |
| 17 | Consistency check of degradation mechanism between natural storage and enhancement test for missile servo system显示文摘Reliability enhancement testing(RET) is an accelerated testing which hastens the performance degradation process to surface its inherent defects of design and manufacture. It is an important hypothesis that the degradation mechanism of the RET is the same as the one of the normal stress condition. In order to check the consistency of two mechanisms, we conduct two enhancement tests with a missile servo system as an object of the study, and preprocess two sets of test data to establish the accelerated degradation models regarding the temperature change rate that is assumed to be the main applied stress of the servo system during the natural storage. Based on the accelerated degradation models and natural storage profile of the servo system, we provide and demonstrate a procedure to check the consistency of two mechanisms by checking the correlation and difference of two sets of degradation data. The results indicate that the two degradation mechanisms are significantly consistent with each other. | Wang Xu Sun Quan | 2019 | Journal of Systems Engineering and Electronics2019，30，2： | 3 |
| 18 | 一种新型2,6-吡啶二甲酸镓(Ⅲ)配合物的合成、结构及抑菌活性研究(英文)显示文摘 | 张秀英 李书静 杨林 | 2005 | 无机化学学报2005，21，7： | 3 |
| 19 | 杀螨剂对蜜蜂的危害显示文摘一、放入蜂箱的杀螨剂比蜂螨危害更大北美洲的养蜂者非常依赖化学杀螨剂氟胺氰菊酯和蝇毒磷,商品名分别为Apistan和Check—mite。这使得蜂螨普遍产生抗药性,并且蜂巢中有化学药物残留。上述两种治螨药物都有亲脂性,它们易渗入巢脾并多年保持毒性, | 吴艳艳 周婷 王强 代平礼 | 2010 | 中国蜂业2010，61，7： | 3 |
| 20 | 挖掘文本价值,整合文本资源——Project的教学策略显示文摘一、Project的教学探索1.Project的教学现状译林出版社在修订义务教育小学英语教科书时,将原来教材中的Review and check(复习单元)变成了Project(综合语言实践项目)。面对新教材、新课型,一线教师是如何探索实践的呢?笔者选取了所在区域内30名不同教龄、不同经验的英语教师,就Project课型的认识和实施提出四个访谈问题,访谈结果如下: | 闵洁 | 2014 | 中小学英语教学与研究2014，，4： | 2 |
您所在的机构暂未开通此部分的功能，请联系管理员