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Search Results: 1 - 10 of 251355 matches for " 张宾 "
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LDPC码校验矩阵回路的求解算法
LDPC Code’s Girth Calculation Algorithm
 [PDF]

焕明,
Hans Journal of Wireless Communications (HJWC) , 2014, DOI: 10.12677/HJWC.2014.41003
Abstract: 1996LDPC(低密度奇偶校验,Low-Density Parity-Check)码是性能限与香农限仅差0.0045 dB的一种差错控制码[1],译码采用SPA(和积算法),但其性能受Tanner图中回路长度和回路数目的影响,回路的存在使译码信息重复迭代,性能下降[2]。本论文通过计算机仿真,采用Matlab元胞数组,将二元校验矩阵转换为树矩阵,实现了求解LDPC码回路的算法。
 Low-Density Parity-Check codes have advantageous performances discovered in 1996 with Shannon limit only 0.0045 dB. Decoding algorithm adopts SPA (Sum-Product Algorithm). However, girths in LDPC codes are detrimental to the code’s performance, and the existence of loops makes the decoding information iterative and the performance reduced. This paper, through computer simulation, using the Matlab cellular array, to convert the binary check matrix to tree matrix, realizes the algorithm of LDPC codes loop
蛋白水解肽-Fe2+配合物对紫贻贝体内Cd脱除的影响

- , 2015, DOI: 10.13982/j.mfst.1673-9078.2015.10.016
Abstract: 为探讨紫贻贝体内重金属Cd残留的脱除方法,采用海水中添加制备的蛋白水解肽-Fe2+配合物(TPH-Fe2+)进行暂养,检测贻贝不同组织器官中Cd含量变化情况。结果显示,贻贝不同器官中Cd富集量,依次为内脏团>鳃>后闭壳肌>外套膜>前闭壳肌,且在0~10 d自然净化过程中,无显著性下降趋势(P>0.05)。添加10 mg/L TPH-Fe2+净化处理,对贻贝内脏团及鳃中Cd含量无显著性影响;添加15~25 mg/L TPH-Fe2+净化处理贻贝4 d后,内脏团、鳃、前后闭壳肌及外套膜中Cd含量均有不同程度下降(P<0.05);20 mg/L TPH-Fe2+净化10 d后,贻贝不同器官中Cd脱除率表现为鳃>内脏团>外套膜>前后闭壳肌,最高脱除率分别为41.00%、37.43%、29.81%和29.01%,与25 mg/L TPH-Fe2+净化处理组无显著性差异(P>0.05)。研究表明,蛋白水解肽-Fe2+配合物有效脱除贻贝体内Cd残留,可作为一种双壳贝类养殖饲料添加剂加以应用。
In order to determine an efficient method for the removal of residual cadmium (Cd) from mussel (Mytilus edulis) tissues, mussels were temporarily raised in seawater containing Trichiurus haumela protein hydrolysate-Fe2+ complex (TPH-Fe2+), and the changes in the Cd content of different tissues and organs were measured. The results indicated that the amounts of accumulated Cd in different mussel organs were in the following order: visceral mass > gill > posterior adductor muscle > mantle > anterior adductor muscle; no obvious change of the Cd content in mussel (Mytilus edulis) tissues was observed (P > 0.05) during the 10-day natural depuration period. After the ten-day treatment with 10 mg/L of TPH-Fe2+, there were no significant changes in the Cd concentrations in the visceral mass and gill of mussel. After a four-day treatment with 15~25 mg/L of TPH-Fe2+, the Cd content in the visceral mass, gill, posterior adductor muscle, mantle, and anterior adductor muscle decreased to various degrees (P < 0.05). After a ten-day treatment with 20 mg/L of TPH-Fe2+, The highest removal rates were 41.00%, 37.43%, 29.81%, and 29.01% for gill, visceral mass, mantle, posterior/anterior adductor muscle, respectively. Similar results were observed after a ten-day treatment with 25 mg/L of TPH-Fe2+ (P > 0.05). The results indicated that TPH-Fe2+ can effectively remove residual Cd in mussels and can be used as an aquaculture feed additive for bivalve mollusks.
幸福智力的动态发展研究
A Study on the Dynamic Development of Well-Being Intelligence
 [PDF]

严标, 兴贵
Advances in Psychology (AP) , 2012, DOI: 10.12677/ap.2012.21005
Abstract: 目的:考察幸福智力在不同年龄阶段的变化情形。方法:采用《幸福智力量表》、《瑞文标准推理测验》对1172名大学生、132名成人、121名高中生分别进行施测。结果:1) 幸福智力总分、感知和体验幸福、表达幸福、评价幸福、调控幸福、瑞文推理智力在成人、大学生、高中生之间都表现出群体差异;2) 随着年龄的增长,瑞文智力水平没有表现出明显的变化趋势,但幸福智力则表现出逐渐上升的趋势;3) 在幸福智力的发展中,幸福智力总分发展缓慢,波动也较小,但其四因素则表现出更多的变化性。结论:随着年龄的增长,幸福智力水平呈现波动中有发展的缓慢上升趋势。
Objective: The paper was to explore the development of well-being intelligence at different ages. Methods: 1172 college students, 132 adults and 121 high school students were measured through the tools of well-being Intelligence Scale, Raven’s Standard Progressive Matrices. Results: 1) Differences on the total score of well-being intelligence, perception and experience of well-being, expression of well-being, assess- ment of well-being, regulation of well-being and Raven’s Progressive intelligence existed among adults, college students and high school students. 2) There was no obvious change in Raven’s Progressive Matrices level with the increase of age, yet Well-being Intelligence level tended to rise gradually. 3) During the de- velopment of Well-being Intelligence, the total marks went up slowly with a relatively small fluctuation while its fourth factor showed more changes. Conclusion: With the increase of age, Well-being Intelligence level tended to develop upward in a slow and fluctuating way.
由恐龙化石论晚白垩世事件沉积

沉积学报 , 1998,
Abstract: 本文根据晚白垩世恐龙化石的分布结合地层学特征,初步提出了这套含有恐龙化石的晚白垩世地层属于事件沉积的观点,并认为导致这次事件沉积的原因可能是由天体撞击地球产生的强海啸形成。
河南省植物区系地域分异研究

地理科学 , 2003,
Abstract: 在最新植物区系资料的基础上,对河南省境内的大别山、桐柏山、伏牛山南北两坡和太行山等地的种子植物区系的差异性和相似性进行了对比分析,结果为大别山与桐柏山的关系最为密切,伏牛山南北两坡的关系最为密切,而太行山与前四者的相似性系数均小,它们在中国的植物分区中应分属于三个不同的植物地区。大别山和桐柏山应属华东植物地区,太行山属华北植物地区,而伏牛山南北两坡关系密切不宜分为两个植物地区,但伏牛山中国特有种的地理成分更接近华中植物地区。
复杂开采条件下复变函数在地表沉陷预计的应用研究

煤炭工程 , 2010,
Abstract: 概率积分法预计地表移动变形,预计区域的确定是第一步重要的工作。在具体的工程应用中,根据研究的需要和采矿地质条件,预计区域可能是任意形状的多边形。在以往的预计程序设计中,预计区域大多采用矩形点阵式设计,这样增加了无效预计点,延长了待机时间。利用矢量格式向栅格格式转换的基本原理,构造一复变函数,并通过推导给出了确定有效预计点的判别方法,并把这一数学语言利用C++的运算符重载技术转化为计算机语言,消除了无效预计点,加快了预计计算速度,减少了等待时间。
关于平流层臭氧耗竭问题的科学争论

地理科学进展 , 1996, DOI: 10.11820/dlkxjz.1996.04.003
Abstract: 为了估计人类活动可能对平流层中臭氧层的潜在影响,人们常用计算机模型来估算全球平均臭氧量的常态变化(Solomon,1988)。这些模型有着固有的局限性(BrasseurandSolomon,1986;Trenberth,1992),而且许多早期的研究是用简单的一维模型完成的。
蔡查罗奇异积分渐近公式的推广

科学通报 , 1985,
Abstract:
云南澄江县旱作生态农业种植模式研究

中国生态农业学报 , 2007,
Abstract:
股权分置改革中的会计问题探析
(教授)
财会月刊 , 2005,
Abstract:   当前正在进行的股权分置改革顺应了市场规律的要求,有利于证券市场的稳定发展,有利于切实保护公众投资者的合法权益。根据试点上市公司公布的股权分置改革方案,非流通股股东支付对价的方式基本有四种:送现金、送股、缩股和送权证,在实际操作中上述方式往往组合运用。  一、支付对价的性质  股权分置改革方案中非流通股股东支付对价的理论依据是:流通股股东拥有流通权,流通股股价包括创业溢价和流通溢价;非流通股股东通过向流通股股东支付对价,获得流通权。因此,支付对价的实质是支付流通溢价,而不是给流通股股东的补偿,对于非流通股股东并未造成损失。一般而言,非流通股股东在股权分置改革中获得的未来经济利益流入明显大于支付对价发生的经济利益流出。例如,上市公司“三一重工”的非流通股股东以放弃9%的控制权和支付4800万元现金的代价,取得66%股份全流通的流通权。
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