OALib Journal期刊

ISSN: 2333-9721




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匹配条件: “JIANG Hai-hua” ,找到相关结果约53092条。
Research on Application-driven Parallel Program Performance Tuning

DI Rui-hua,JIANG Hai-hua,LV Hai,
,蒋海华,吕 海

计算机科学 , 2013,
Abstract: Multi-core processor provides multiple threads parallel execution capability, and makes applications to have huge potential for performance improvement, but makes it enormously challenge to efficiently develop high-performance program Meanwhile, through the old process of performance optimization, the scalability is difficult to be guarantee.From application point of view,attributing core calculation to patterns and motifs,and optimizing these motifs can produce reusable library that can support efficient develop new application,and also can guarantee the scalability of the application performance. A layered parallel computing model was used for guidance in this article. From the perspective of application-driven parallel program performance optimization, this article designed a new parallel multi-core processor computing modcl,which can be used in the architecture of multi core processor chip. Based on this model,g-scan algorithm was designed which has good extendibility together with high performance after analyzing and optimizing some fundamental parallel algorithms. At the last, newly designed parallel algorithm was applied to OpenSeesSP which is a finite element software widely used in structure engineering.
A Review-Based Reputation Evaluation Approach for Web Services
Hai-Hua Li,Xiao-Yong Du,Xuan Tian,

计算机科学技术学报 , 2009,
Abstract: Web services are commonly perceived as an environment of both offering opportunities and threats. In this environment, one way to minimize threats is to use reputation evaluation, which can be computed, for example, through transaction feedback. However, the current feedback-based approach is inaccurate and ineffective because of its inner limitations (e.g., feedback quality problem). As the main source of feedback, the qualities of existing on-line reviews are often varied greatly from low to high, the main reasons include: (1) they have no standard expression formats, (2) dishonest comments may exist among these reviews due to malicious attacking. Up to present, the quality problem of review has not been well solved, which greatly degrades their importance on service reputation evaluation. Therefore, we firstly present a novel evaluation approach for review quality in terms of multiple metrics. Then, we make a further improvement in service reputation evaluation based on those filtered reviews. Experimental results show the effectiveness and efficiency of our proposed approach compared with the naive feedback-based approaches.
Composition,structure and species diversity of plant communities along an altitudinal gradient on the northern slope of Mt.Changbai,Northeast China

ZHAO Shu-Qing,FANG Jing-Yun,ZONG Zhan-Jiang,ZHU Biao,SHEN Hai-Hua,

生物多样性 , 2004,
Abstract: 通过沿海拔梯度的系统调查,运用TWINSPAN分类方法,划分出长白山北坡的主要植物群落类型,对这些群落的组成和结构进行了分析。利用物种丰富度、α多样性和β多样性等指标,研究了群落多样性随海拔梯度的变化趋势。结果表明,乔木层植物可分为4个群落类型:从低海拔到高海拔依次为红松(Pinus koraiensis)针阔混交林、红松针阔叶树种与云冷杉组成的过渡群落、云冷杉暗针叶林以及岳桦林(Betula ermanii)。乔木层优势种重要值的分析清楚地反映出长白山北坡植被垂直带谱的优势成分。径级频度分布的分析表明该区域主要群落的自我更新状况良好。植物物种多样性随海拔梯度的变化趋势为:随海拔升高,乔木层和灌木层的物种丰富度呈下降趋势,但草本层的变化趋势不明显;乔木层和灌木层的α多样性(Shannon-Wiener指数)呈下降趋势,草本层则变化不明显;无论是木本层还是草本层的Pielou均匀度指数均没有明显的变化;乔木层、灌木层和草本层植物的β多样性(Cody指数)均随着海拔的升高而下降。
Study on a new point mutation of nt7444 G→A in the mitochondrial DNA in a type 2 diabetes mellitus family
一个2型糖尿病家系中新发现的线粒体DNA G7444A 突变分析

CHENG Zu-Jian,YANG Bin,LIU Qi-Cai,JIANG Ling,XIE Hai-Hua,OU Qi-Shui,

遗传 , 2007,
Abstract: Polymerase chain reaction restriction fragment length polymorphism (PCR-RFLP) and direct sequencing were applied to detect a new point mutation of nt7444G-->A in the mitochondrial DNA in a type 2 diabetes mellitus family. The related clinical data were also collected and analyzed. mtDNA G7444A mutation in the cytochrome c oxidase I (COI) gene was found in 11 of 27 cases, all of whom were from the maternal side. Among them, 5 were confirmed to have type 2 diabetes mellitus, and one had impaired glucose tolerance. We conclude that the novel point mutation of mtDNA G7444A may be an independent factor associated with type 2 diabetes mellitus.
Lower bound of law of the iterated logarithm for the local time of multi-parameter stable processes

SHI Hai-Hua,

中国科学院研究生院学报 , 2010,
Abstract: This paper mainly studies law of the iterated logarithm for the local time of multi-parameter stable processes. A lower bound of law of the iterated logarithm is established.
Far-field superlens for nanolithography

Chen Jian,WangQing-Kang,Li Hai-Hua,

中国物理 B , 2010,
Abstract: A far-field optical lithography is developed in this paper. By designing the structure of a far-field optical superlens, lithographical resolution can be improved by using a conventional UV light source. The finite different time domain numerical studies indicate that the lithographic resolution at 50~nm line width is achievable with the structure shown in this paper by using 365~nm wavelength light, and the light can be transferred to a far distance in the photoresist.
Near-Infrared Light Scattering by Ice-Water Mixed Clouds
Xianming Sun;Yiping Han;Hai-Hua Wang
PIER , 2006, DOI: 10.2528/PIER06011401
Abstract: Based on the Mie theory, the light scattering properties of clouds consisting of pure water, pure ice spheres and concentric water- ice spheres are studied in the near-infrared regions, respectively. We computed the single scattering albedo, phase function, and asymmetry parameters of water clouds, ice clouds, and ice-water mixed clouds. The near infrared reflectivity of the ice-water mixed clouds is computed by using the adding-doubling method and compared to the other two types of clouds. It is shown that it is possible to use the near infrared reflectivity to derive the microphysical characteristics of the clouds.
Sources of calcium in agonist-induced contraction of rat distal colon smooth muscle in vitro
Hua Zhou, De-Hu Kong, Qun-Wan Pan, Hai-Hua Wang
World Journal of Gastroenterology , 2008,
Abstract: AIM: To study the origin of calcium necessary for agonist-induced contraction of the distal colon in rats.METHODS: The change in intracellular calcium concentration ([Ca2+]i) evoked by elevating external Ca2+ was detected by fura 2/AM fluorescence. Contractile activity was measured with a force displacement transducer. Tension was continuously monitored and recorded using a Powerlab 4/25T data acquisition system with an ML110 bridge bioelectric physiographic amplifier.RESULTS: Store depletion induced Ca2+ influx had an effect on [Ca2+]i. In nominally Ca2+-free medium, the sarco-endoplasmic reticulum Ca2+-ATPase inhibitor thapsigargin (1 μmol/L) increased [Ca2+]i from 68 to 241 nmol/L, and to 458 (P < 0.01) and 1006 nmol/L (P < 0.01), respectively, when 1.5 mmol/L and 3.0 mmol/L extracellular Ca2+ was reintroduced. Furthermore, the change in [Ca2+]i was observed with verapamil (5 μmol/L), La3+ (1 mmol/L) or KCl (40 mmol/L) in the bathing solution. These channels were sensitive to La3+ (P < 0.01), insensitive to verapamil, and voltage independent. In isolated distal colons we found that in normal Krebs solution, contraction induced by acetylcholine (ACh) was partially inhibited by verapamil, and the inhibitory rate was 41% (P < 0.05). On the other hand, in Ca2+-free Krebs solution, ACh induced transient contraction due to Ca2+ release from the intracellular stores. The transient contraction lasted until the Ca2+ store was depleted. Restoration of extracellular Ca2+ in the presence of atropine produced contraction, mainly due to Ca2+ influx. Such contraction was not inhibited by verapamil, but was decreased by La3+ (50 μmol/L) from 0.96 to 0.72 g (P < 0.01).CONCLUSION: The predominant source of activator Ca2+ for the contractile response to agonist is extracellular Ca2+, and intracellular Ca2+ has little role to play in mediating excitation-contraction coupling by agonists in rat distal colon smooth muscle in vitro. The influx of extracellular Ca2+ is mainly mediated through voltage-, receptor- and store-operated Ca2+ channels, which can be used as an alternative to develop new drugs targeted on the dysfunction of digestive tract motility.
Ddiscussion about Addition Microbiological Contents to Biological Outdoor Practice of Normal College Students

Kang Jian,Wang Hai-Hua,

微生物学通报 , 2000,
Abstract: 在我国师范类高等院校的教学计划中,传统的野外实习课程设计只涉及到动物学、植物学的有关内容,而以生物数量最多的一类——微生物为研究对象的微生物学内容没有涉及到,这不能不说是一个遗憾。对此,我们曾对野外实习中增加微生物学方面的考察进行了讨论和可行性分析,认为不仅是必要的,而且是可行的。一方面可以增强学生的动手能力,加深学生对微生物的感性认识;另一方面在开发新的微生物物种方面,特别是有意识地寻找有某一特殊生理生化功能的微生物,有很大的发展前景。野外实习,由于学生多,去的地区广,具有在实验室中无法相比的…
Economic Development and the Industrial Allocation of Foreign Capital

JIAO Ji-wen,WU Hai-hua,

系统工程理论与实践 , 2000,
Abstract: Firstly, it is provided in this dissertation that the input\|ouput relationships of the host country is relatively stable in "\$t\$" period in its economic development; the standard linear programming model on the industrial structure of foreign capital in \$"t 1"\$ period is given; On the basis of this, each technical parameter of the model will be randomized, so that the restricted conditions in period \$t 1\$ are destroyd, the compensation problem in period \$t 2\$ is further studied. Then the more practical quadratic programming model in stochastic linear programming is set up. Finally, the concluding remarks of the model are given.Development an

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