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A Test Pattern Identification Algorithm and Its Application to CINRAD/SA(B) Data
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作者 JIANG Yuan LIU Liping 《Advances in Atmospheric Sciences》 SCIE CAS CSCD 2014年第2期331-343,共13页
A variety of faulty radar echoes may cause serious problems with radar data applications,especially radar data assimilation and quantitative precipitation estimates.In this study,"test pattern" caused by test signal... A variety of faulty radar echoes may cause serious problems with radar data applications,especially radar data assimilation and quantitative precipitation estimates.In this study,"test pattern" caused by test signal or radar hardware failures in CINRAD (China New Generation Weather Radar) SA and SB radar operational observations are investigated.In order to distinguish the test pattern from other types of radar echoes,such as precipitation,clear air and other non-meteorological echoes,five feature parameters including the effective reflectivity data percentage (Rz),velocity RF (range folding) data percentage (RRF),missing velocity data percentage (RM),averaged along-azimuth reflectivity fluctuation (RNr,z) and averaged along-beam reflectivity fluctuation (RNa,z) are proposed.Based on the fuzzy logic method,a test pattern identification algorithm is developed,and the statistical results from all the different kinds of radar echoes indicate the performance of the algorithm.Analysis of two typical cases with heavy precipitation echoes located inside the test pattern are performed.The statistical results show that the test pattern identification algorithm performs well,since the test pattern is recognized in most cases.Besides,the algorithm can effectively remove the test pattern signal and retain strong precipitation echoes in heavy rainfall events. 展开更多
关键词 quality control test pattern fuzzy logic radar data
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Study on Test Compaction in High-Level Automatic Test Pattern Generation (ATPG) Platform 被引量:1
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作者 Ayub Chin Abdullah Chia Yee Ooi 《Circuits and Systems》 2013年第4期342-349,共8页
Advancements in semiconductor technology are making gate-level test generation more challenging. This is because a large amount of detailed structural information must be processed in the search process of automatic t... Advancements in semiconductor technology are making gate-level test generation more challenging. This is because a large amount of detailed structural information must be processed in the search process of automatic test pattern generation (ATPG). In addition, ATPG needs to deal with new defects caused by process variation when IC is shrinking. To reduce the computation effort of ATPG, test generation could be started earlier at higher abstraction level, which is in line with top-down design methodology that has become more popular nowadays. In this research, we employ Chen’s high-level fault model in the high-level ATPG. Besides shorter ATPG time as shown in many previous works, our study showed that high-level ATPG also contributes to test compaction. This is because most of the high-level faults correlate with the gate-level collapsed faults especially at input/output of the modules in a circuit. The high-level ATPG prototype used in our work is mainly composed by constraint-driven test generation engine and fault simulation engine. Experimental result showed that more reduced/compact test set can be generated from the high-level ATPG. 展开更多
关键词 Automatic test pattern Generation (ATPG) Constraint Logic Programming (CLP) Verilator Circuit-Under-test (CUT) test COMPACTION
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Enhancing SAT-Based Test Pattern Generation
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作者 刘歆 熊有伦 《Journal of Electronic Science and Technology of China》 2005年第2期134-139,共6页
This paper presents modeling tools based on Boolean satisfiability (SAT) to solve problems of test generation for combinational circuits. It exploits an added layer to maintain circuit-related information and value ju... This paper presents modeling tools based on Boolean satisfiability (SAT) to solve problems of test generation for combinational circuits. It exploits an added layer to maintain circuit-related information and value justification relations to a generic SAT algorithm. It dovetails binary decision graphs (BDD) and SAT techniques to improve the efficiency of automatic test pattern generation (ATPG). More specifically, it first exploits inexpensive reconvergent fanout analysis of circuit to gather information on the local signal correlation by using BDD learning, then uses the above learned information to restrict and focus the overall search space of SAT-based ATPG. Its learning technique is effective and lightweight. The experimental results demonstrate the effectiveness of the approach. 展开更多
关键词 test pattern generation fault detection Boolean satisfiability binary decision graphs
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Ultrasonic Testing Combined with Pattern Recognition for the Detection of Kissing Bonds
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作者 Jens Schuster David Müller +1 位作者 Ming-Hong Chen Quentin Govignon 《Open Journal of Composite Materials》 2019年第3期260-270,共11页
Kissing bonds are defects in the adhesive bonds with intimate contact of touching surface but considerably lowered shear strength. Their detection specifically in the aerospace area is so not satisfactory. Usually, ki... Kissing bonds are defects in the adhesive bonds with intimate contact of touching surface but considerably lowered shear strength. Their detection specifically in the aerospace area is so not satisfactory. Usually, kissing bonds are inconspicuous in ultrasonic C-scans. However, the determination of attributes in the time domain and the frequency domain of an ultrasound signal provides the opportunity to derive a pattern for bonded area. Deviations from the pattern found in inconspicuous bonding areas indicate kissing bonds. The survey described here deals with the manufacturing of adhesively joint samples that purposefully include kissing bonds, as well as potential solutions for detecting them through ultrasonic testing combined with pattern recognition. The properties of the epoxy-based adhesive were varied by changing the mixing ratios between resin and hardener. Samples with a mixing ratio far apart from the manufacturer’s recommendation with an inconspicuous appearance in a C-scan, but low shear strength values were taken for further evaluation. After a definition and learning phase, a 100 percent hit rate to separate good bondings from kissing bonds could be derived in a blind test. The discriminating feature found is due to the frequency shift between good and kissing bonds as well as the relative amplitude of the second peak. 展开更多
关键词 ULTRASONIC testing Time DOMAIN Frequency DOMAIN pattern RECOGNITION BOND Quality KISSING BOND
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测试图形程序的进一步研究:PATTERN抽象及再实现 被引量:1
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作者 孙育宁 时万春 《计算机研究与发展》 EI CSCD 北大核心 1996年第11期842-848,共7页
异构自动测试仪(ATE)之间的测试图形程序移植是一项难度很高的工作。通常采用的方法是对测试图形向量进行逐条直移。这样,如果在异构ATE测试图形语言之间找不到对应的语言成分,将导致实际有可能成功的移植失败。并且,即使这... 异构自动测试仪(ATE)之间的测试图形程序移植是一项难度很高的工作。通常采用的方法是对测试图形向量进行逐条直移。这样,如果在异构ATE测试图形语言之间找不到对应的语言成分,将导致实际有可能成功的移植失败。并且,即使这样移植成功,移植的测试图形程序可保证词法和语法的正确性,但在大多数情况下,这些程序仍不能在目标ATE上正确运行。本文在详细分析了传统移植方法后,提出一种基于异构ATE功能对等的移植方法,使测试图形程序在移植前后保持其意义的一致性。利用这种方法,可以大大提高测试图程序的可移植性。 展开更多
关键词 软件工程 测试图形程序 程序移植
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Dependence of single event upsets sensitivity of low energy proton on test factors in 65 nm SRAM 被引量:1
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作者 Yin-Yong Luo Feng-Qi Zhang +2 位作者 Xiao-Yu Pan Hong-Xia Guo Yuan-Ming Wang 《Chinese Physics B》 SCIE EI CAS CSCD 2018年第7期566-571,共6页
In order to accurately predict the single event upsets (SEU) rate of on-orbit proton, the influence of the proton energy distribution, incident angle, supply voltage, and test pattern on the height, width, and posit... In order to accurately predict the single event upsets (SEU) rate of on-orbit proton, the influence of the proton energy distribution, incident angle, supply voltage, and test pattern on the height, width, and position of SEU peak of low energy protons (LEP) in 65 nm static random access memory (SRAM) are quantitatively evaluated and analyzed based on LEP testing data and Monte Carlo simulation. The results show that different initial proton energies used to degrade the beam energy will bring about the difference in the energy distribution of average proton energy at the surface and sensitive region of the device under test (DUT), which further leads to significant differences including the height of SEU peak and the threshold energy of SEU. Using the lowest initial proton energy is extremely important for SEU testing with low energy protons. The proton energy corresponding to the SEU peak shifts to higher average proton energies with the increase of the tilt angle, and the SEU peaks also increase significantly. The reduction of supply voltage lowers the critical charge of SEU, leading to the increase of LEP SEU cross section. For standard 6-transitor SRAM with bit-interleaving technology, SEU peak does not show clear dependence on three test patterns of logical checkerboard 55H, all" 1", and all "0". It should be noted that all the SEUs in 65 nm SRAM are single cell upset in LEP testing due to proton's low linear energy transfer (LET) value. 展开更多
关键词 low energy proton energy distribution tilt angle supply voltage test pattern
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Classification of carbonate gas condensate reservoirs using well test and production data analyses 被引量:3
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作者 Li Yong Li Baozhu +5 位作者 Hu Yongle Xia Jing Liu Zhaowei Deng Xingliang She Zhicheng Fan Kun 《Petroleum Science》 SCIE CAS CSCD 2011年第1期70-78,共9页
Carbonate reservoir patterns play an important role in the production performance of oil and gas wells,and it is usually classified through static data analysis which cannot reflect the actual well performance.This pa... Carbonate reservoir patterns play an important role in the production performance of oil and gas wells,and it is usually classified through static data analysis which cannot reflect the actual well performance.This paper takes the Tazhong No.1 gas field in the Tarim Basin,China as an example to investigate the classification of carbonate reservoirs.The classification method mainly combines well test analysis with production analysis—especially the Blasingame type curve method.Based on the characteristics of type curves for well test analysis and the Blasingame method,the relationship between the type curves and reservoir pattern was established.More than 20 wells were analyzed and the reservoirs were classified into 3 major patterns with 7 sub-classes.Furthermore,the classification results were validated by dynamic performance analysis of wells in the Tazhong No.1 gas field.On the basis of the classification results,well stimulation(i.e.water flooding in a single well) was carried out in three volatile-oil wells,and the oil recovery increased by up to 20%. 展开更多
关键词 CARBONATE reservoir pattern well test analysis production analysis type curve
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Behaviour of layered sandstone under Brazilian test conditions:Layer orientation and shape effects 被引量:9
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作者 Abbass Tavallali André Vervoort 《Journal of Rock Mechanics and Geotechnical Engineering》 SCIE CSCD 2013年第5期366-377,共12页
The experimental study in this paper focuses on the effects of the layer orientation and sample shape on failure strength and fracture pattern of samples tested under Brazilian test conditions(i.e.diametrical loading ... The experimental study in this paper focuses on the effects of the layer orientation and sample shape on failure strength and fracture pattern of samples tested under Brazilian test conditions(i.e.diametrical loading of cylindrical discs)for one particular layered sandstone which is from Modave in the south of Belgium.The variations of the strength in combination with the failure patterns are examined as a function of the inclination angle between the layer plane and the loading direction.The experimental,results clearly show that the induced fracture patterns are a combination of tensile and/or shear fractures.In shape effect experiments the layer thickness and the number of layer boundaries are investigated.Different blocks of Modave sandstone are used to prepare samples.The layer thickness is different among the various blocks,but the layer thickness in each studied rock block can be considered to be constant;hence,the number of layer boundaries changes according to the sample diameter for samples of the same block.The experimental study shows that the layer thickness plays a more important role than the number of layer boundaries per sample. 展开更多
关键词 Layered sandstone Brazilian test Fracture pattern Layer activation Shape effect
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The structure-based multi-fault test generation algorithm for combinational circuit
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作者 商庆华 吴丽华 项傅佳 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2006年第4期452-454,共3页
In this paper the structure-based test generation algorithm has been studied for the problem that test patterns are obtained by determined finite faults set in the past. This Algorithm can find out all test patterns o... In this paper the structure-based test generation algorithm has been studied for the problem that test patterns are obtained by determined finite faults set in the past. This Algorithm can find out all test patterns one tithe, so faults detection is very convenient. By simulation, the smallest test patterns set can be obtained and faults coverage rate is 100%. 展开更多
关键词 combinational circuit test generation the smallest test patterns set
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Comparative Study on Physical Fitness Test Models of Chinese, Japanese and American Students
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作者 Xingxing Hou 《教育研究前沿(中英文版)》 2019年第4期309-312,共4页
The physical health of adolescents is related to the future of the nation and the competitiveness of the country.Through a comparative analysis of the backgrounds,organizations,testing programs and evolution processes... The physical health of adolescents is related to the future of the nation and the competitiveness of the country.Through a comparative analysis of the backgrounds,organizations,testing programs and evolution processes of physical health tests in China,Japan and the United States,the three countries are explored.The development trends and problems of student physical fitness tests,find the differences,learn about the research results and experiences of physical fitness tests in Japan and the United States,draw on Japanese and American management models and successful cases,and propose some methods to optimize and improve China's physical fitness test models.It is recommended to make full use of the existing resources to promote the improvement of students'physical fitness. 展开更多
关键词 CHINESE JAPANESE AMERICAN STUDENTS PHYSIQUE test pattern Contrastive Study
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Drug Susceptibility Patterns of Mycobacterium tuberculosis Isolates from Tuberculosis Patients in Coastal Kenya
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作者 Shadrack A. Yonge Michael F. Otieno +1 位作者 Rekha R. Sharma Sarah S. Nteka 《Journal of Tuberculosis Research》 2017年第4期201-219,共19页
Background: Tuberculosis (TB) is an infectious disease caused by the bacillus Mycobacterium tuberculosis. Anti-tuberculosis drug resistance is an emerging health problem in Kenya and especially in Coastal region. This... Background: Tuberculosis (TB) is an infectious disease caused by the bacillus Mycobacterium tuberculosis. Anti-tuberculosis drug resistance is an emerging health problem in Kenya and especially in Coastal region. This is a major challenge in tuberculosis control. Diagnosis is based on Ziel-Neelsen staining alone and patients are treated without information on sensitivity patterns. Aim: This study aimed to determine drug susceptibility patterns of Mycobacterium tuberculosis in Coastal Kenya. Study Design: Hospital and laboratory based cross-sectional study was carried between April 2015 and July 2016 at Coast General Referral hospital;Tudor, Port-Reitz, Likoni Sub-County hospitals;Mlaleo, Kongowea and Mikindani health centers. Methodology: Sputum samples from patients with bacteriological confirmed TB on microscopy were cultured on Lowenstein Jensen (LJ) media. Strains of MTB complex from Lowenstein Jensen (LJ) slopes were subjected to drug susceptibility testing (DST) to first-line drugs including isoniazid (H), rifampicin (R), streptomycin (S) and Ethambutol (E) using proportional method on the Mycobacterium Growth Indicator Tube (MGIT) conventional method. Participants were offered diagnostic testing and counselling for HIV testing. Results: Drug sensitivity test was performed for a total of 210 Mycobacterium tuberculosis isolates for the first line anti-TB drugs. About seventy eight percent and twenty nine percent of the strains from new patients and previously treated patients were fully sensitive to all the drugs tested respectively. Prevalence of any resistance to one drug was 102 (48.6%, 95% CI: 20.45 - 28.23). Any single drug resistance was most frequent in isoniazid 30 (16.0%), Ethambutol 20 (10.0%), Streptomycin 18 (18.3%) and Rifampicin 4 (2.1%) in newly diagnosed patients. Among previously treated patients any resistance to streptomycin, ethambutol, isoniaziad and rifampicin was 10 (58.8%), 9 (52.9%), 7 (41.2%) and 4 (23.5%) respectively. Prevalence of MDR-TB defined as resistant to at least both isoniazid and rifampicin was 10 (4.8%) among new and previously treated patients respectively. Conclusion: The current study reveals that the overall resistance to first line anti-TB drugs was high. Although the rate of MDR-TB was relatively low, this signifies that conditions favouring the spread of MDR-TB are on high rise. Therefore, it is essential to address the problems of development of drug re-sistant strains of TB by establishing good TB programmes (DOTS). Patients’ adherence to anti-TB drugs and introducing drug sensitivity testing (DST) services at County level hospitals will minimize occurrence of drug resistant. 展开更多
关键词 TUBERCULOSIS RESISTANCE patternS Susceptibility tests MULTIDRUG RESISTANCE
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Drug Resistance Trends and Patterns of Mycobacterium Tuberculosis Isolates from Pulmonary Tuberculosis Patients at a Tertiary Care Hospital in Turkey
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作者 Esra Yazar Pinar Yildiz +4 位作者 Gulsah Gunluoglu Sedat Altin Veysel Yilmaz Derya Gencer Hatice Yazisiz 《Journal of Tuberculosis Research》 2014年第4期155-159,共5页
Background: We aim to determine the proportions and patterns of resistance to first-line drugs: isoniazid (H), rifampicin (R), ethambutol (E) and streptomycin (S) among pulmonary tuberculosis patients. Methods: Strain... Background: We aim to determine the proportions and patterns of resistance to first-line drugs: isoniazid (H), rifampicin (R), ethambutol (E) and streptomycin (S) among pulmonary tuberculosis patients. Methods: Strains were obtained from 1584 culture positive pulmonary tuberculosis patients. All specimens were inoculated into L?wenstein-Jensen media (LJ) and TK selective;drug susceptibility tests (DST) were performed for first-line drugs. Results: Multidrug resistant (MDR) were detected in 146 (9.2%) isolates. Three hundred (18.9%) isolates were resistant to H;220 (13.9%) to R;168 (10.6%) to S;137 (8.6%) to E. Any drug resistance was detected in 442 (27.9%) isolates. MDR rate was higher in male patients than females (P = 0.006). MDR rates were different according to the age groups (P = 0.02). The highest rate was in 35 - 44 years and the lowest rate was in 15 - 24 years. Conclusions: We found an association between middle age and male gender and MDR tuberculosis. 展开更多
关键词 TUBERCULOSIS DRUG Resistance patternS DRUG Susceptibility test
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SIMULTANEOUS RECORDING OF FRINGE PATTERNS WITH ONE CAMERA
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作者 苏飞 戴福隆 +1 位作者 CHIAN Kerm Sin YI Sung 《Acta Mechanica Sinica》 SCIE EI CAS CSCD 2004年第6期642-648,共7页
A novel method to separate and simultaneously record the Moiréinterferometry fringe patterns of three deformation fields with only one CCD camera is developed;details of its operation principle,key points and err... A novel method to separate and simultaneously record the Moiréinterferometry fringe patterns of three deformation fields with only one CCD camera is developed;details of its operation principle,key points and error analysis are presented.With this technique,the deformation in U,V and W fields can be measured simultaneously,so dynamic test with comprehensive information can be performed.The advantage of this technique over other similar techniques lies in its simplicity,easy implementation and low cost.An application of this technique is given to show its feasibility.Technical problems that may be caused with this technique are also analyzed. 展开更多
关键词 moiré interferometry dynamic test fringe pattern POLARIZATION optical prism
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CORE-UNIFIED SOC TEST DATA COMPRESSION AND APPLICATION
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作者 Yi Maoxiang Guo Xueying +2 位作者 Liang Huaguo Wang Wei Zhang Lei 《Journal of Electronics(China)》 2010年第1期79-87,共9页
The pattern run-length coding test data compression approach is extended by introducing don't care bit(x) propagation strategy into it.More than one core test sets for testing core-based System-on-Chip(SoC) are un... The pattern run-length coding test data compression approach is extended by introducing don't care bit(x) propagation strategy into it.More than one core test sets for testing core-based System-on-Chip(SoC) are unified into a single one,which is compressed by the extended coding technique.A reconfigurable scan test application mechanism is presented,in which test data for multiple cores are scanned and captured jointly to make SoC test application more efficient with low hardware overhead added.The proposed union test technique is applied to an academic SoC embedded by six large ISCAS'89 benchmarks,and to an ITC' 02 benchmark circuit.Experiment results show that compared with the existing schemes in which a core test set is compressed and applied independently of other cores,the proposed scheme can not only improve test data compression/decompression,but also reduce the redundant shift and capture cycles during scan testing,decreasing SoC test application time effectively. 展开更多
关键词 System-on-Chip(SoC) test application time pattern run-length X-propagation Union test RECONFIGURATION
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Reporting Children’s Development below the Test Floor: Looking Back and Forth to Describe Individual Strengths and Needs
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作者 Elizabeth M. Green Louise A. Stroud 《Health》 CAS 2023年第2期122-133,共12页
The test floor effects seen in standardised tests lead to a standardised score of 1 or less with a flat profile that hides a child’s individual strengths and needs. The Griffiths III community of practitioners reques... The test floor effects seen in standardised tests lead to a standardised score of 1 or less with a flat profile that hides a child’s individual strengths and needs. The Griffiths III community of practitioners requested advice on the reporting of children’s development below the floor of the test, so that individual strengths and needs can be described. This paper reports the third phase of research following an earlier Scoping Review and a wider literature review. To confirm quality control, Phase 3 was conducted in a retrospective manner using the same methodology as the earlier phases but in a reverse direction. Peer reviewer comments and key elements from the Scoping Review and keywords from the publications were tabulated. Data analysis included a change of perspective to that of the child and their individual rights with respect to the literature themes already described in Phase 2. These confirmed that there is little specific guidance in the literature, but that computational advances for homogeneous populations and especially disaggregated data offer some solutions. A greater balance between broad biopsychosocial models and standardised models of assessment should be sought by practitioners together with the use of disaggregated data to highlight issues that pertain to individual subsets of results. This will ensure that the child’s right for their individual strengths and needs to be described together with a plan for management, may be met. 展开更多
关键词 Developmental Assessment Children with Severe Disability Disaggregated Data pattern and Needs Identification Below test Floor
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基于虚拟仪器的集成运放自动测试教学辅助平台设计
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作者 吴丹阳 《昆明冶金高等专科学校学报》 CAS 2024年第4期53-58,共6页
为降低设备故障对模拟电子技术实验教学效率的影响,基于虚拟仪器技术设计了一种集成运放自动测试教学辅助平台。利用集成化虚拟仪器实验平台NI ELVIS II进行数据传输,设计了测试电路板卡;利用Lab-VIEW软件设计了仪器面板和平台软件部分... 为降低设备故障对模拟电子技术实验教学效率的影响,基于虚拟仪器技术设计了一种集成运放自动测试教学辅助平台。利用集成化虚拟仪器实验平台NI ELVIS II进行数据传输,设计了测试电路板卡;利用Lab-VIEW软件设计了仪器面板和平台软件部分。使用集成运放μA714芯片对平台进行了测试,并在模拟电子技术的实际教学中进行了效果验证。测试和实际使用结果表明,该平台可以准确检测出故障芯片,正确率>95%;相比于未使用本平台时,师生使用本平台进行实验的准确率提升超过20%,耗时降低超过20%。 展开更多
关键词 虚拟仪器 自动测试 设计模式
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Amphibian and reptilian distribution patterns in the transitional zone between the Euro-Siberian and Central Asia Subrealms 被引量:1
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作者 ZHOU Lu SHI Lei 《Journal of Arid Land》 SCIE CSCD 2015年第4期555-565,共11页
There exist some controversies over the larger zoogeographic divisions of the arid areas of Central Asia, whose characteristics include complex ecological environments, complex fauna origins and unique patterns of ani... There exist some controversies over the larger zoogeographic divisions of the arid areas of Central Asia, whose characteristics include complex ecological environments, complex fauna origins and unique patterns of animal distribution. The aim of this study was to determine, using quantitative analysis, the distribution patterns of amphibians and reptiles in the arid areas of Central Asia, whose various physiographical regions were divided into 17 Operative Geographical Units (OGUs). Based on the presence or absence of 52 amphibian and reptile genera in the 17 OGUs, and by making use of the Czekanowski Similarity Index, the Baroni-Urbani and Buser's Similarity Index, and the strong and weak boundary test, we studied the biotic boundaries within these contested regions. In accordance with our results, the classification dendrogram was divided into two main branches. One branch is composed of the northern OGUs of the Altai Mountains which are a part of the Euro-Siberian Subrealm. The other branch includes all of the OGUs south of the Altai Mountains, which belong to the Central Asia Subrealm. There is a significantly weak biotic boundary (DW〉0, GW〉GS, P〈0.01) between the Euro-Siberian Subrealm and the Central Asia Subrealm that corre- sponded to the transitional zones. The boundary between the two subrealms runs along the Altai Mountains, the Sayan Mountains, the Hangai Mountains and the Mongolian Dagurr Mountains. The boundaries between the main branches in the Central Asia Subrealm are weak, reflecting the widespread existence of transitional zones in the arid areas of Central Asia. The Tianshan Mountains should be elevated to form its own separate region, "the Middle Asian Mountain Region", which, due to its special fauna and environment, would be classified at the same level as the Mongolia-Xinjiang Region. With the approach of creating a cluster analysis dendogram based upon the genera of amphibians and reptiles, the relationship of these higher level zoogeographical divisions was successfully resolved and the error of long-branch attraction was also avoided. With our clustering dendrogram as the foundation, the in- dependence test was applied to strong and weak boundaries, and this resolved the problem of where to attribute the transition areas and revealed as well the barrier effect that physical, geographic boundaries have upon amphibians and reptiles. The approach of combining genera clustering analysis with a statistical boundary test should be applicable not only to the distribution patterns of other animal groups, but also to delineating large-scale zoogeographical divisions. 展开更多
关键词 amphibian and reptile distribution pattern higher level zoogeographic division similarity analysis boundary test arid area Central Asia
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Novel Test Approach for Interconnect Resources in Field Programmable Gate Arrays
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作者 Yong-Bo Liao Wen-Chang Li Ping Li Ai-Wu Ruan 《Journal of Electronic Science and Technology》 CAS 2011年第1期85-89,共5页
A novel test approach for interconnect resources (IRs) in field programmable gate arrays (FPGA) has been proposed.In the test approach,SBs (switch boxes) of IRs in FPGA has been utilized to test IRs.Furthermore,... A novel test approach for interconnect resources (IRs) in field programmable gate arrays (FPGA) has been proposed.In the test approach,SBs (switch boxes) of IRs in FPGA has been utilized to test IRs.Furthermore,configurable logic blocks (CLBs) in FPGA have also been employed to enhance driving capability and the position of fault IR can be determined by monitoring the IRs associated SBs.As a result,IRs can be scanned maximally with minimum configuration patterns.In the experiment,an in-house developed FPGA test system based on system-on-chip (SoC) hardware/software verification technology has been applied to test XC4000E family of Xilinx.The experiment results revealed that the IRs in FPGA can be tested by 6 test patterns. 展开更多
关键词 Configurable logic blocks configuretion pattern field programmable gate arrays interconnect resources test switch box.
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鄂尔多斯盆地东缘深部煤层气开发先导试验效果与启示 被引量:7
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作者 聂志宏 徐凤银 +10 位作者 时小松 熊先钺 宋伟 张雷 刘莹 孙伟 冯延青 刘世瑞 闫霞 孙潇逸 吴满生 《煤田地质与勘探》 EI CAS CSCD 北大核心 2024年第2期1-12,共12页
鄂尔多斯盆地东缘大宁-吉县区块深部煤层气勘探开发取得突破对煤层气产业带来重大影响,引起业内广泛关注和跟进。前期一些学者对深部煤层气勘探开发理论技术难点与对策开展了研究,但缺乏对典型气田开发先导试验系统总结。通过深入剖析... 鄂尔多斯盆地东缘大宁-吉县区块深部煤层气勘探开发取得突破对煤层气产业带来重大影响,引起业内广泛关注和跟进。前期一些学者对深部煤层气勘探开发理论技术难点与对策开展了研究,但缺乏对典型气田开发先导试验系统总结。通过深入剖析深部煤层气地质特征与效益开发难点,总结大宁-吉县区块开发先导试验项目取得的进展和成效,明确开发规律并提出效益开发对策。结果表明:(1)深部煤层具有广覆式发育、含气性好、游离气含量高、保存条件好、煤体结构好、脆性指数高、顶底板封盖性强等地质特征,但微构造发育、渗透性极差、矿化度高等因素制约了深部煤层气效益开发;(2)不同地质条件下气井生产特征差异较大,通过先导试验落实气井产能和适应性开发技术对策,采用滚动开发模式可有效降低煤层强非均质性带来的开发风险;(3)开展地质-工程一体化井网优化设计,构建井网与缝网高度弥合的人造气藏,可实现资源动用和采收率最大化;(4)“长水平段+多段多簇+大砂量”的大规模、大排量极限体积压裂技术可增大有效改造体积和井控储量,大幅提高单井产量;(5)深部煤层气井具有“见气时间短、上产速度快、初期产量高、递减快”的生产特征,可实现短期快速规模上产,但气田长期稳产需持续新井投入;(6)前期开发成本偏高,实现效益开发需不断提高工程作业效率、降低开发成本。综合认为,深部煤层气资源品质好,可动用性强,具备快速推广复制条件,大宁-吉县区块深部煤层气开发实践可为国内其他区块深部煤层气规模动用提供技术借鉴,对加快深部煤层气规模勘探开发具有重要意义。 展开更多
关键词 鄂尔多斯盆地东缘 大宁-吉县区块 深部煤层气 先导试验 开发规律 极限体积压裂技术
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基于ATE的千级数量管脚FPGA多芯片同测技术
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作者 秦立君 余永涛 +2 位作者 罗军 李军求 庞水全 《电子技术应用》 2024年第7期51-54,共4页
随着超大规模FPGA芯片技术发展,芯片管脚数量提升到1000以上,如何实现超大规模多引脚FPGA芯片高效测试成为ATE在线测试难点。针对一款千级数量管脚超大规模的FPGA芯片,基于FPGA的可编程特性,采用多芯片有效pin功能并行测试和单芯片全pi... 随着超大规模FPGA芯片技术发展,芯片管脚数量提升到1000以上,如何实现超大规模多引脚FPGA芯片高效测试成为ATE在线测试难点。针对一款千级数量管脚超大规模的FPGA芯片,基于FPGA的可编程特性,采用多芯片有效pin功能并行测试和单芯片全pin电性能参数测试相结合的方法进行ATE测试,实现了千级数量管脚FPGA芯片的4芯片同测,测试效率提升3倍多。 展开更多
关键词 现场可编程门阵列 自动化测试系统 多芯片同测 功能测试
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