油藏数值模拟中井筒压力梯度的校正方法

有限元法用于油藏数值模拟具有独特的优越性.由于井筒附近流动的特殊性,直接采用数值模拟得到的压力梯度计算油井产量会导致较大的误差.本文分析了数值模拟中井筒压力梯度产生误差的原因,在此基础上提出了计算井筒压力梯度的校正公式.计算结果表明,压力梯度校正公式可显著提高油井产量的计算精度,并能有效地减少井筒附近的网格剖分数量,从而提高了计算效率

WELLBORE PRESSURE GRADIENT CORRECTION METHOD IN NUMERICAL RESERVOIR SIMULATION

有限元法用于油藏数值模拟具有独特的优越性.由于井筒附近流动的特殊性,直接采用数值模拟得到的压力梯度计算油井产量会导致较大的误差.本文分析了数值模拟中井筒压力梯度产生误差的原因,在此基础上提出了计算井筒压力梯度的校正公式.计算结果表明,压力梯度校正公式可显著提高油井产量的计算精度,并能有效地减少井筒附近的网格剖分数量,从而提高了计算效率

西北干旱区生态用地概念及其功能分类研究

阐明了西北干旱区生态用地概念与定义 ,并依据功能将其划分为人工型与自然型两大类。其中人工型生态用地包括农业绿洲型和城镇绿洲型 ,自然型生态用地包括自然保护区型、山区水源涵养林型、天然绿洲型、湿地型、荒漠植被型和夹荒地型 ,分析了每种类型生态用地服务于主体生态系统的功能。并指出该区近期生态用地的研究重点应集中于生态用地资源评价 ,掌握其数量、质量及其空间分布规律 ;确定生态用地在西北干旱区以及区内不同流域中所占合理比例 ;定量化研究生态用地与生态用水间的关系

Description on two species of Benedenian from Epinephelus awoara in Xiamen, Fujian, China(Monogenea: Capsalidae)

报道厦门海域网箱养殖的石斑鱼广泛流行感染的 2种贝尼登单殖吸虫病原 ,它们是 :康吉新贝尼登虫 N eobenedeniella congeri(Yamaguti,195 8) Yamaguti,1963和片卷涡异贝尼登虫Allobenedenia convoluta(Yamaguti,1937) Yamaguti,1963,均寄生于青石斑鱼 (Ep inephelusawoara) .这两种贝尼登虫均隶属于单殖吸虫目分室科 (Capsalidae)的贝尼登亚科 (Benedeniinae) .对这 2种贝尼登虫病原进行了形态记述和感染报道 ,并对这两种贝尼登虫病原在厦门海水养殖石斑鱼中的流行感染情况进行了简单介绍Two species of benedenian are reported to infect on the body surface of maricult ured fish in Xiamen (24°29′N, 118°03′E.), Fujian, China. Both of them belong to 2 different genus of Benedeniinae, Capsalidae respectively. Their host is Epinephelus awoara (Serranidae). Neobenedeniella congeri is 2.13 mm long, 0.83 mm width; and Allobenedenia convoluta is 2.66 mm long, 0.79 m m width, anterior suckers 0.08～0.2×0.04～0.15 mm, marginal hooklets 14 in numb er, 0.009 mm long, egg 0.155×0.128 mm.国家 (863- 819- 0 2 - 0 12 )和福建省自然科学基金 (B9910 0 0 5 )联合资助项

DEVELOPMENT OF MONOGENEAN TREMATODE (NEOBENEDENIA GIRELLAE, MONOGENEA: CAPSALIDAE)

报道了寄生于海水养殖鱼类体表的新本尼登虫 (Neobenedeniagirellae)生活史各期的发育过程。虫卵在 2 5℃～ 2 8℃海水温度条件下 4～ 6d钩毛蚴发育成熟 ;用钩毛蚴人工感染一种鲻科鱼类———棱 (Lizacarinatus)获得成功。在 2 6℃～ 30℃实验室温度条件下 ,钩毛蚴感染棱 10～ 14d后虫体发育成熟 ,并在感染后的第 16天虫体开始产卵。本文对新本尼登虫的生活史发育各期幼虫的形态进行详细的观察、描述、测量和绘图The development of monogenean trematode (Neobenedenia girellae)(Monogenea:Capsalidae), from the maricultured fishes, was studied in Fujian province. All eggs used for this study were obtained from the parasites on the body surface of amberjack fry (Seriola dumerili) collected in floating sea cages, in Xiamen (24°29′N, 118°03′E), Fujian, China. In laboratory, the oncomiracidia hatched from eggs in four to six days at 25℃～28℃ in salt water. Then, the oncomiracidia were used to infect the fish (Liza carinatus) in laboratory. After attaching to the skin of the fish host, the oncomiracidia developed to adult in 10～14 days at the room temperature (26℃～30℃). On the sixteenth day, the adults began to release eggs. The fish host (Liza carinatus) is proved to be a new host record of N. girellae. The morphology of eggs, oncomiracidia, immature worms and adults of this monogenean was described in this paper.国家“8 6 3”计划项目 ( 86 3 819 0 2 0 12 );; 福建省自然科学基金资助项目 (B9910 0 0 5 )~

Study on aetiology of Neobenedenia melleni (Monogenea: Capsalidae) from Marine fishes In Fujian, China

本文对寄生于厦门内海域网箱养殖鱼类———大黄鱼 (Pseudosciaenacrocea)和高体鱼师(Serioladumerili)等名贵经济鱼类体表的单殖类吸虫———梅氏新贝尼登虫(Neobenedeniamelleni)的形态进行观察描述 ,并附简图 .就福建沿海当前流行感染情况及国内外研究概况亦进行了简要介绍 .In 1999, some monogenean ( Neobenedenia melleni ) on the skin of marine fishes ( Pseudosciaena crocea, Seriola dumerili and Epinephelus awoara ) were found in Xiamen, Fujian, China. They were described as follows (Measured in microns). Host: Pseudosciaena crocea , and Seriola dumerili . Locality: Xiamen, Fujian, China. 24°29′ N,118°03′E. Site: Skin and gill. Body elliptical, total length including haptor 2 635～4 689(3 817μm, n =20), maximum width 1 255～2 683(2 015)μm, at anterior end of testes. Haptor almost circular, smooth, shallow, 983～1 081μm×935～1 057(1 051×1 026)μm, aseptate, with 1 pair of accessory sclerites, 1 pair of anterior hamuli and 1 pair of posterior hamuli in linear series and 7 pairs of marginal hooklets. Accessory sclerites stout, scoop shaped, 219～236(228)μm long; anterior hamuli longest, 275～363(318)μm; posterior hamuli short, 125～163(146)μm. Marginal hooklets arranged radially,14 in number. Anterior attachment organs disc suckerlike, each 395～426μm×312～386(413×358)μm. Pharynx glandular, with 5 lobed, 205～359μm×267～446(333×406)μm. Esophagus short. Intestinal crura dendritic medially and laterally, not confluent posteriorly, Four eyes embedded in ganglionic mass. Two testes side by side, spherical, indented, 316～427μm×343～447(375×402)μm. Glands of Goto may be observed. Ovary oval, 355～426μm×338～406(398×370)μm, containing an expanded ventral chamber. Uterus short, leading to common genital pore. Vitelline folliclos, extend anterior to pharynx, posteriorly to posterior end of the body proper. Eggs polyhedral, 128～205μm×143～186(172×165)μm, with a long filament(261～385)μm at the end.福建省自然科学基金!资助项目 (B 9910 0 0 5 ) ;; 国家八六三计划资助!项目 (86 3 819 0 2 0 12

用核孔滤膜在等负压条件下研究红细胞变形能力的理论分析

在临床上检验红细胞的变形能力已广泛作为诊断的辅助手段。检验方法之一是让红细胞稀悬浮液在等负压下通过核孔滤膜过滤。本文针对这一试验提出了一个生物流体力学模型,用两个参数β和ε来描述红细胞的变形能力,其中β是红细胞通过单个孔时的相对阻力,ε是红细胞使孔堵塞的概率。本文揭示了这两个参数对于过滤流量随时间变化规律的不同影响。根据这一不同点,本文导出了简单的公式可由实验数据算出β和ε。理论计算曲线与实验数据对比表明,本文提出的双参数模型能比通常采用的单个总体参数“过滤指数”(IF)更全面细致地描述红细胞变形能力。中国科学引文数据库(CSCD)00286-9