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Search Results: 1 - 10 of 35081 matches for " 梁梦芽? "
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三种除草剂对五爪金龙的防除作用及2,4-d丁酯对环境的影响
张泰劼?,罗剑宁?,李伟华?,,田兴山?,彭长连?
热带亚热带植物学报 , 2012, DOI: 10.3969/j.issn.1005-3395.2012.04.001
Abstract: 用3种除草剂(2,4-d丁酯、麦草畏和塔隆)对五爪金龙(ipomoeacairical.sweet)进行化学防除试验。结果表明:1.00mll-1的2,4-d丁酯可以彻底杀灭五爪金龙。喷施1.00mll-12,4-d丁酯20d后,五爪金龙茎叶枯死率接近100%;60d后五爪金龙的总生物量显著低于其它处理及对照;90d后未出现生长恢复,最终盖度防效为99.8%。而喷施1.00mll-1的麦草畏40d后,五爪金龙的茎叶枯死率为99.0%,但仍有少量存活的根,90d后再次萌生率为10.0%;喷施1.00mll-1塔隆40d后,五爪金龙的茎叶枯死率为100%,90d后再次萌生率为100%。土壤残留分析表明:在有机质含量较高[(10.14±1.01)gkg-1]的土壤中2,4-d丁酯降解速率较快,半衰期为14d,施药后80d的土壤中已检测不到2,4-d丁酯。此外,在野外喷洒1.0mll-1的2,4-d丁酯对其它植物是安全的,施药1年后,样地内的植物均能恢复生长。因此,实践中可用1.00mll-1的2,4-d丁酯来防除五爪金龙。
Lagrangian乘子区域分解法的一类预条件子
胡齐,国平
计算数学 , 1998,
Abstract:
Chemical Control of Ipomoea cairica with Three Herbicides and Effect of 2,4-D Butylate on the Environment
三种除草剂对五爪金龙的防除作用及2,4-D丁酯对环境的影响

ZHANG Tai-jie,LUO Jian-ning,LI Wei-hu,LIANG Meng-y,TIAN Xing-shan,PENG Chang-lian,
张泰劼
,罗剑宁,李伟华,,田兴山,彭长连

热带亚热带植物学报 , 2012,
Abstract: Ipomoea cairica is a notorious weed which has serious harm to the environment in South China. The effects of three chemical herbicides, such as 2,4-D butylate, dicamba and fluroxypyr, on control of I. cairica in the field were studied. The results showed that 2,4-D butylate (1.00 mL L-1) could eradicate this weed. The death rate of I. cairica stems and leaves was close to 100% after spraying 2,4-D butylate (1.00 mL L-1) in 20 days. The total biomass also decreased significantly in 60 days (P<0.05), and the growth did not recovery after 90 days. The final control effect of 2,4-D butylate (1.00 mL L-1) on Ipomoea cairica was 99.8%. After spraying dicamba (1.00 mL L-1) and fluroxypyr (1.00 mL L-1) in 40 days, the death rate of I. cairica stems and leaves were 99.0% and 100%, respectively, and the regeneration rate of I. cairica was 10% and 100% after 90 days. A few roots were survival sprayed dicamba (1.00 mL L-1) after 40 days. The herbicide residue analysis showed that 2,4-D butylate could degrade quickly with half-life for 14 days, and it could not be detected in the soil after 80 days. Furthermore, 2,4-D butylate (1.00 mL L-1) was relatively safe to other plants, which could regenerate after spraying 2,4-D butylate in 1 year. Therefore, it suggested that the Ipomoea cairica growth could be good control treated with 1.00 mL L-1 2,4-D butylate.
SOLVING PARABOLIC PROBLEMS BY DOMAIN DECOMPOSITION METHODS WITH LAGRANGIAN MULTIPLIERS
抛物问题的拉格朗日乘子区域分解法

胡齐,国平,孙澎涛
计算数学 , 2000,
Abstract: In this paper we consider domain decomposition methods with Lagrangian multipliers, which are applied to solving parabolic problems. We shall estimate condition numbers of the resulting interface matrices, and construct two kinds of simple preconditioners for the corresponding interface equations. It will be shown that the condition numbers of the resulting preconditioned interface matrices are almost optimal.
抛物问题的拉格朗日乘子区域分解法
胡齐,国平,孙澎涛
计算数学 , 2000,
Abstract:
鸡新城疫口服dna疫苗的安全性、稳定性与免疫效力
方维焕* 江玲丽
生物工程学报 , 2003,
Abstract: 将含新城疫病毒(ndv)f48e9株融合蛋白(f)基因的真核表达质粒pcdna3-f的减毒鼠伤寒沙门氏菌zj111株(zj111/pcdan3-f)口服接种小鼠和雏鸡。结果表明:利用该减毒株作为载体传递dna疫苗具有相对安全性。用酶切和pcr鉴定法证实在体内外无抗生素存在的条件下重组质粒在受体菌zj111菌株内比较稳定。zj111/pcdan3-f以每羽108cfu免疫雏鸡,2周后二免,二免后4周攻击致死剂量的强毒株f48e9,观察其免疫效力。结果表明:重组zj111/pcdna3-f菌株不仅能诱导雏鸡产生抗ndv抗体,而且能诱导法氏囊b淋巴细胞和胸腺t淋巴细胞的增殖反应,对强毒株攻击的保护率为66.7%,高于pcdna3-f裸质粒dna疫苗注射免疫组(50%)。上述结果初步提示减毒沙门氏菌为载体传递dna疫苗具有良好的安全性、稳定性和免疫原性,为研制低成本、实用化的口服禽类dna疫苗奠定了基础。
武汉服务业发展状况、结构特征及其对经济增长的影响分析
Wuhan Service Industry Development Status, Structure, Characteristics and Impact Analysis on Economic Growth
 [PDF]

, 胡蓓蕾,
Modern Management (MM) , 2016, DOI: 10.12677/MM.2016.62009
Abstract:
2014年,武汉市人均GDP达到98,000元(15,954美元),已迈入工业化的中后期阶段,实体经济的壮大为服务业的快速发展提供了巨大的上升空间。武汉服务业的发展问题,已经成为武汉市经济发展的重大问题,2013年5月2日,武汉市宣布启动服务业升级的计划,这对武汉服务业的发展提出了更高的要求。本文首先研究了当前武汉市服务业的发展状况及结构特征,其次利用描述性统计分析,通过图表和数据简单明了的论证了武汉市服务业与经济增长之间的相互关系,实证研究表明:武汉市服务业对经济的增长具有强大的促进作用,同时武汉经济的增长也有力地推动了武汉市服务业的发展,两者具有明显的关联和互动作用。
In 2014, Wuhan’s per capita GDP reached 98,000 RMB ($15,954), which has entered the middle and later stages of industrialization. The rapid development of the real economy provides a huge space for the rapid development of the service industry. The development of service industry in Wuhan has become a major problem in the economic development of Wuhan. On May 2, 2013, Wuhan announced the launch of the service industry upgrade plan, which made a higher demand for the development of the service industry in Wuhan. Firstly, this paper studies the development status and structure characteristics of the service industry in Wuhan. Secondly, the paper analyzes the relationship between the service industry and economic growth in Wuhan by using the descriptive statistical analysis. Empirical research shows that the service industry in Wuhan has a strong role in promoting economic growth, while Wuhan’s economic growth has also greatly promoted the development of the service industry in Wuhan.
A KIND OF PRECONDITIONER FOR DOMAIN DECOMPOSITION METHODS WITH LAGRANGIAN MULTIPLIERS
Lagrangian乘子区域分解法的一类预条件子

Hu Qi-ya,Liang Guo-ping,
胡齐
,国平

计算数学 , 1998,
Abstract: In this paper we construct a kind of simple preconditioner for non-overlapping domain decomposition methods with Lagrangian multipliers. It will be shown that condition numbed of the preconditioned interface matrix is almost optimal.
THE EXPLICIT SCHEME OF LAGRANGIAN MULTIPLIE DOMAIN DOCOMPOSITION METHOD DEPENDENT ON TIME
依赖时间的Lagrange乘子区域分解法的显式格式

Liu Jinzhao,
刘金朝
,国平,胡齐

计算数学 , 2001,
Abstract: In the paper we introduce and study the explicit scheme of lagrangian multi- plier domain decomposition method dependent on time. The Uzawa algorithm is introduced to solve the interior displacement variables and the boundary multiplier variables. It will be shown that the condition number of the stiffness matrix of the lagrangian multiplier has a constant bound, i.e. O(1). The numerical experiments indicate that the method is very efficient.
A GENERAL FRAMEWORK TO CONSTRUCT INTERFACE PRECONDITIONER FOR DOMAIN DECOMPOSITION METHODS
区域分解界面预条件子构造的一般框架

Hu Qiya,Liang Guoping,
胡齐
,国平

计算数学 , 1999,
Abstract: In this paper we propose a unified framework to construct interface preconditioner for non-overlapping domain decomposition methods, and prove a generalresu1t to estimate condition number of preconditioned interface matrices. Basingon this, we analyse the essence of the known interface preconditioners, and construct a kind of interface preconditioner for hybrid element domain decompositionmethods.
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