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In two inequalities concerning the circumradius and inradius of an n dimensional simplex in the n dimensional Euclidean space E n were obtained, Thus, the n dimensional Euler inequality and the inequality in , were improved.

给出了n维欧氏空间En中的两个关于单形外接球半径和内径的几何不等式，同时进一步改进了文［1］和［2］中的n维欧拉不等式。

The Composition, structure and properties of Fe-N, Ti-N and B-N films prepared by ion beam assisted deposition were investigated.

采用离子束辅助沉积的方法系统研究了Fe-N，Ti-N和B-N薄膜的成分，结构和性能。

The Composition, structure and properties of Fe-N, Ti-N and B-N films prepared by ion beam assisted deposition we...

采用离子束辅助沉积的方法系统研究了Fe-N，Ti-N和B-N薄膜的成分，结构和性能。

The recipients were divided into 3 groups randomly: Isograft group (n=6), Lewis to Lewis. TA group (n=7), Brown-Norway to Lewis intervention group (n=7). In the group of BN to Lewis, administered aspirin at a dose of 80 mg/ for 8 weeks after operation.

受体随机分3组，同系组(n=6)： Lewis至Lewis颈总动脉移植；TA组(n=7)： Brown-Norway至Lewis颈总动脉移植；干预组(n=7)： BN至Lewis颈总动脉移植，术后给予阿司匹林80mg/治疗8周。

Applying 6% organic materials + 500mg kg〓 N fertilizer, we got the result that the N content is the highest in leaf, stem and absorbing root and promoted 46%, 28%, 44% respectively compared with controls; N% increased most significantly in ligneous root and growing root of 200 and 500mg kg〓 N fertilizer, by 32% and 29% respectively.

叶、茎、吸收根N％以6％有机物料+500mg kg〓氮肥处理最大，与CK相比，分别上升了46％、28％和44％，单纯施用200和500mg kg〓氮肥的处理中木质根、生长根的N％增加最明显，分别提高了32％和29％。

This shows that the Riemann mapping theorem of n-dimensioanl quasiconformal mappings holds in the class of bounded and convex domains in ■~n.

证明n维空间中的有界凸域D能被拟共形映射到n维单位球B~n(0，1)，即D是拟球，从而说明拟共形映射中的黎曼定理在n维空间中的有界凸域类中是成立的。

Let x: M→S(superscript n+1)(n≥3) be a hypersurface in the (n+1)-dimensional unit sphere without umbilic points. Denote the Mbius metric, the Mbius form, the Blaschke form and the Mbius second fundamental form of x by G,Ф, A and B, repcectively, which are Mbius invariants in Mbius differential geometry.

设x： M→S(上标 n+1)(n≥3)是n+1-维单位球中的无脐点超曲面，Mbius不变量G，Ф，A和B分别表示x的Mbius度量，Mbius形式，Blaschke形式和Mbius第二基本形式。

As a whole,the notable characteristic of primary productivity in size-fractioned structure was that nanoplankton occupied comparatively significant advantage in Beibu Gulf.Nanoplankton has the largest contribution to gross primary productivity,and picoplankton was the secondary contributor,while microplankton the least.The contribution of microplankton for primary productivity in the north Gulf was more than that in the other waters.Nanoplankton and picoplankton contribute more to the gross primary productivity in offshore deep waters than in inshore shallow waters3.The Beibu Gulf can be divided into three ecoregions:Region-Ⅰis the ecoregion in inshore shallow waters of the north Gulf.In average,the water depth is 18m,DIN is 1.88μmol/L,DIP is 0.20μmol/L,N:P is 9.4:1,dissolved silicate is 5.17μmol/L,the Chl a conentration in surface layer is 2.27mg·m~(-3),the assimilation index in surface layer is 3.80mg/,the primary productivity is 198.78mgC/(m~2·d), and potential fishery production is estimated to be 0.24gC/(m~2·a) according to the primary productivity.The ecoregion is mainly affected by the northern coastal water systems,and may be fit for aquaculture;Region-Ⅱis the ecoregion in offshore deep waters of the north Gulf and the coastal shallow waters to the west Hainan Island.In average,the water depth is 35m,DIN is 2.01μmol/L,DIP is 0.18μmol/L,N:P is 11.2:1,disovled silicate is 4.23μmol/L,the chlorophyll a of surface layer concentration is 1.45mg·m~(-3),the assimilation index of surface layer is 4.12 mg/,the primary productivity is 276.60mgC/(m~2·d),and the estimated potential fishery production is 0.34gC/(m~2·a) according to the primary productivity. The ecoregion was mainly influenced by ocean current from the South China Sea, rivers in the west coast of Hainan Island and the water from Qiongzhou Strait.It may be fit for aquaculture and fishery;Region-Ⅲis the ecoregion in offshore deep waters of the mid and south Gulf.In average,the water depth is 75m,DIN is 0.77μmol/L, DIP is 0.15μmol/L,N:P is 5.1:1,disovled silicate is 3.05μmol/L,the chlorophyll a of surface layer concentration is 0.70mg·m~(-3),the assimilation index of surface layer averaged is 3.69mg/,the primary productivity is 350.89mgC/(m~2·d),and the estimated potential fishery production is 0.43gC/(m~2·a) according to the primary productivity.The ecoregion was mainly affected by the circulation inside Beibu Gulf, and may be fit for fishery.

初级生产力的粒级结构的一个显著特点是总体上微型浮游生物在全调查海区均占较明显优势，对总初级生产力的平均贡献最大；微微型浮游生物对初级生产力的平均贡献次之；小型浮游生物对总初级生产力的平均贡献最小；湾北部小型浮游生物对初级生产力的平均贡献高于湾中部和湾南部，而湾中部和湾南部微型和微微型浮游生物对初级生产力的平均贡献高于湾北部，远岸深水区高于近岸浅水区。3、北部湾可以分为三个生态区：湾北部近岸浅水区，该区的环境主要特点是平均水深19m，DIN浓度平均值为1.88μmol/L，DIP浓度平均值为0.20μmol/L，N：P为9.4：1，硅酸盐浓度平均值为5.17μmol/L，表层叶绿素a平均值高达2.27 mg·m~(-3)，表层同化指数平均为3.80 mg/，初级生产力平均值198.78mgC/(m~2·d)，根据初级生产力计算潜在渔业资源碳生产量平均为0.24 gC/(m~2·a)，该区主要受湾北部沿岸水系影响，适合作为水产养殖区；湾北部深水区和海南岛西部沿岸浅水区，该区的环境主要特点是平均水深35m，DIN浓度平均值为2.01μmol/L，DIP浓度平均值为0.18μmol/L，N：P为11.2：1，硅酸盐浓度平均值为4.23μmol/L，表层叶绿素a平均值1.45 mg·m~(-3)，表层同化指数平均为4.12mg/，初级生产力平均值276.60 mgC/(m~2·d)，根据初级生产力计算潜在渔业资源碳生产量平均为0.34 gC/(m~2·a)，该区主要受南部湾口区海流向湾内延伸，沿岸海南岛河流注入湾内和琼州海峡过道水的影响，适合作为渔业作业区和水产养殖区；湾中部和南部远岸深水区，该区的环境主要特点是平均水深75m，DIN浓度平均值为0.77μmol/L，DIP浓度平均值为0.15μmol/L，N：P为5.1：1，硅酸盐浓度平均值为3.05μmol/L，表层叶绿素a平均值0.70 mg·m~(-3)，表层同化指数平均为3.69 mg/，初级生产力平均值350.89 mgC/(m~2·d)，根据初级生产力计算潜在渔业资源碳生产量平均为0.43 gC/(m~2·a)，该区主要受北部湾环流影响，适合作为渔业作业区。

An interview guide entitled,"Maternal Perception of the Onset of Lactation" was also used to obtain milk secretion data. The analytical results revealed a mean onset of lactation of 75.7±16.8 hours (range=40 to 117). The prevalence of delayed lactation onset was 50.5%(n=58); 64.3%(n=42) were primiparous, and 41.9%(n=74) were multiparous. Parity, hours of withholding oral intake post-operation, and use of formula were significant predictors of perceived lactation onset. These factors explained 22.5% of perceived lactation onset in postpartum women who planned cesarean section.

研究结果发现：(1)泌乳起始时间的平均值为757±168小时（范围40至117小时）；(2)产妇自觉延迟泌乳的发生机率为500%(n=58)，其中延迟泌乳的初产妇有27位，占所有初产妇(n=42)的64.3%，延迟泌乳的经产妇有31位，占所有经产妇(n=74)的41.9%，经产妇发生延迟泌乳的机率较低；(3)产次、术后禁食时间以及配方乳使用，是泌乳起始时间的重要预测因子，共可解释计画剖腹产妇泌乳起始时间总变异数的22.5%。

In 1991 Faudree et al obtained the 2-connected graph of order n with NC≥n-δ,then it is Hamiltonian.

Faudree等在 1991年得到 N C≥ n -δ条件下熟知的哈密尔顿性结果，其后，一些论文研究 N C2 ≥ n -δ的哈密尔顿图性。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。