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Search Results: 1 - 10 of 297594 matches for " 张建 "
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基于等角紧框架的稀疏信号重构算法
Sparse Signal Reconstruction Algorithm Based on ETF
 [PDF]

, 洪峰
Computer Science and Application (CSA) , 2015, DOI: 10.12677/CSA.2015.55021
Abstract:
由于信号稀疏表示的优良特性,已被用于信号处理很多领域,但计算复杂成为其实际应用中一大障碍。框架理论是一个新的研究方向,框架可以更为灵活的表示信号。本文结合稀疏信号和框架的特点,提出一种基于等角紧框架(Equiangular Tight Frames, ETF)的稀疏信号重构算法,并通过相应仿真验证。
As sparse representation of signals has excellent characteristics, it has been applied in several fields of signal processing. However, the computational complexity has become a major obstacle in practical application. Frame theory is a new research direction and can be more flexible repre-sentation signal. In this paper, with the characteristics of sparse signal and frameworks, we propose a sparse signal reconstruction algorithm based on ETF, and then simulate and verify it.
学术影响力评价指标之间的相关性分析——基于医学领域某一细分学科的视角
 [PDF]

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Evaluation and Management (EM) , 2016, DOI: 10.12677/em.2016.94008
Abstract:
随着科学计量学和科研评价实践的发展,以h指数为代表的学术影响力评价指标不断发展完善,诸多学者对其与以影响因子为代表的传统计量学指标的相关性进行了研究。然而很多或未严格考虑研究对象的一致性(如期刊在相同时间区域的载文),或未考虑跨学科比较的差异性等。本研究选择JCR 2009年版收录的心脏与心血管系统学科下的期刊为对象,统计各期刊的载文量、总被引次数、影响因子、特征因子、h指数和相对h指数6个指标数据,并对其进行相关性分析,从而了解医学领域某一细分学科学术影响力指标之间的相互关系,以期为实际应用时提供理论基础与事实依据。
With the development of scientometrics and scientific evaluation practice, the academic influence evaluation indicators represented by h-index continued to evolve, and were compared with the traditional bibliometrics evaluation indicators such as impact factor by many scholars. However, many of those studies didn’t strictly consider the consistency of research objects (such as journal papers in the same time zone), or not consider the differences between the cross disciplinary and so on. This paper selected all journals of Cardiac & Cardiovascular Systems included by JCR 2009, and gathered statistics of journal papers, total citation counts, impact factor, eigenfactor, h-index, and relative h-index as well as the relationship among them, so as to understand the relationship between indicators in specific discipline and to provide theoretical foundation and basis for the practical application.
阿勒泰地区2008年春夏连旱对农牧业的影响分析
The Impact of 2008 Spring and Summer Drought in Altay Region on Agriculture
 [PDF]

李健丽,
Climate Change Research Letters (CCRL) , 2014, DOI: 10.12677/CCRL.2014.33018
Abstract:
干旱是制约阿勒泰地区农牧业发展的主要气象灾害之一。2008年阿勒泰地区遭遇春夏连旱,对当地农牧业生产造成了严重影响,当地政府及气象、农业等部门加强旱情监测,部门联动促进农牧业生产,适时开展人工增雨(雪)作业,加强农牧业管理,力争将灾害损失降到最低。
Drought, one of main weather disasters in Altay region, affects the development of agriculture. Altay region suffered continuous drought in the spring and summer of 2008, which has a serious impact on local agriculture and animal husbandry production. Local governments, meteorological sector, agricultural sector as well as other related sectors strengthen drought monitoring, promote agricultural production, timely carry out artificial precipitation snow, strengthen agricultural management, and strive to minimize disaster losses.
评价投资基金长期业绩的新模型——基于对传统模型的批判
A New Model to Evaluate the Long-Term Investment Performance of Investment Fund ——Based on Criticism to Traditional Model
 [PDF]

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Finance (FIN) , 2014, DOI: 10.12677/FIN.2014.42007
Abstract:
本文研究国内开放式基金长期投资业绩的评价问题。我们指出了传统评价模型与指标在评价投资基金的长期业绩时存在着谬误与局限。为真实地反映基金机构的投资水平,我们设计了基于计量经济学虚拟变量回归模型的“胜负链统计法”。新方法去除了传统模型的局限性,能比较真实客观地评测基金相对于市场基准的长期运营业绩。文章最后利用新方法,对国内开放式基金的运营状况做了实际中肯的评价。
This paper studies the evaluations of long-term investment performance of domestic open-end funds. We point out that the traditional evaluation model and index have some fallacies and limi- tations when evaluating the long-term investment performance of investment funds. To truly re- flect the investment level of a fund agency, we design a new method called “statistics of outcome chain”, based on the Dummy variable regression model. The new method eliminates the limita- tions of traditional model, and it can objectively evaluate the long-term investment performance of funds. Finally, using the new method, we give some fair evaluations to some domestic open-end funds.
中西医药物治疗巩膜炎的研究进展
Review on Treatments of Scleritis with Chinese Medicine and Western Medicine
 [PDF]

李超然,
Traditional Chinese Medicine (TCM) , 2015, DOI: 10.12677/TCM.2015.43011
Abstract: 巩膜炎(scleritis),中医称之为“火疳”,为巩膜组织的炎性反应疾病。因巩膜组织由胶原纤维和少量弹性纤维交错致密排列而成,细胞成分和血管较少,导致该疾病并不常见。然而,由于巩膜代谢缓慢,一旦患病,病程往往迁延难愈。在药物治疗上主要有非甾体抗炎药、甾体抗炎药、皮质类固醇药、免疫抑制剂、生物制剂、中药提取物及中药汤剂。本文归纳了上述药物治疗巩膜炎的给药方式及各自临床疗效,分析其中利弊,为临床医疗工作人员提供医疗证据。
Scleritis, also called “episcleritis” in Traditional Chinese Medicine, is an inflammation of sclera tissues. As sclera tissues are compactly composed of collagen fibers and a few of elastic fibers with few cellular constituents and vessels, this disease is uncommon. However, once happened, it has a lingering course due to the slow metabolism of sclera. Drugs mainly include non-steroidal anti-in- flammatory drugs, steroidal anti-inflammatory drugs, corticosteroids, immunosuppressive agent, biological agent, herbal extracts and herbal decoction of Traditional Chinese Medicine. This paper reviewed the administration methods and their clinical effects in treating scleritis with drugs mentioned above, analyzed their advantages and disadvantages, and provided medical evidences for clinical medical staff.
论我国内地与港澳特区区际刑事司法协助的基本原则

法学家 , 1999,
Abstract:
山东沂沭裂谷系七宝山金铜矿床地质特征

地质与勘探 , 1987,
Abstract: 沂沭裂谷系断陷盆地中的中生代中心式火山机构控制着七宝山金铜矿床。从该火山机构富轻稀土和所含微量元素推断,系含金背景值高的胶东群重熔的产物。由于岩浆在深部的分异,先后喷溢出从中基性向中偏酸性转化的环状杂岩体和放射状岩墙、岩枝。分析各岩浆岩的微量金,以晚期石英闪长玢岩和花岗闪长斑岩中含量最高,与金矿化关系最密切。在隐爆角砾岩简形成之后,金属矿化形成于其裂隙中。矿化岩石具面型蚀变,以硅化、绢云母化、黄铁矿化为主。现存矿体上部150米内以金为主,向下以铜为主。矿石构造有分带现象,上部为角砾间的网脉加细脉浸染体。下部只有细脉浸染体。气包裹体研究证明已被剥蚀到矿体中部。金属矿物较简单,主要为镜铁矿含自然金和银金矿,次为黄铁矿、黄铜矿、菱铁矿和微量硫盐。认为该矿为斑岩型金铜矿床。
吉林省岩浆熔离硫化铜镍矿床的找矿与勘探

地质与勘探 , 1960,
Abstract: 内生金属矿床一般都与地质构造有直接联系,吉林省岩浆熔离硫化铜镍矿床则受着大地构造的控制,在本省东半部对这种矿床的生成是非常有利的.为便于指导找矿与勘探,特将几年来工作的点滴体会介绍如下。
日本农业结构改革中的农协问题分析

华东师范大学学报(哲学社会科学版) , 2015, DOI: 10.16382/ j.cnki.10005579.2015.02.011
Abstract: 日本农协改革日本国内意见出现“以保护为前提的改革”与“以解体为前提的改革”的主流意见对立。本文意在从日本农业面临的最重要问题———结构改革中农协所处的位置及两者之间的相互关系分析中确认今后日本农协改革的中长期可取方向。论述中选取了日本二战后与结构改革相关的重大农业政策进行考察与分析。今后日本农协改革需要进行组织、业务和经营管理改革,分离金融业务,中期内实现专营涉农业务目标,长期看需将农协改造为具有市场竞争力的现代化农业经营组织。
浙江省遂昌―龙泉地区金矿成矿模式及找矿方向

地质与勘探 , 1984,
Abstract: 遂昌-龙泉地区的金矿实际上是金银矿,为环太平洋成矿带的组成部分,是我国东南沿海火山岩带金矿发育的典型地区.建立其成矿模式,对开展这类地区的找矿工作是有帮助的.成矿模式一、与金银矿成矿关系最密切的因素是区域地质中建瓯群变质岩系夹有混合岩的片麻岩类建瓯群也称陈蔡群,于中、晚侏罗世发生强烈地壳运动时,继承了早已存在的断裂构造,后期产生了明显的断块隆起,分布于遂昌-龙泉等地区.其中大柘、高亭、龙泉三条变质岩断块呈带状,以北北东的方向组成左行斜列式.由丽水幅(1∶200000)可以看出,变质岩在不同的地
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