拉丁方

Sampling points were obtained by using optimal Latin hypercube design of experimental method,meantime,in order to improve computing efficiency,application of stepwise regression response surface approximate method in the MDO system of the vehicle crashworthiness and free mode of Body-In-White,the approximate model was optimized by using sequential quadratic programming method.

采用最优拉丁方试验设计方法进行样本数据设计，同时，为了提高计算效率，采用了一种新型的响应面构建方法——逐步回归响应面方法构建了整车耐撞性与白车身自由模态多学科系统的近似模型，利用序列二次规划优化方法对此近似模型进行优化，避免了整车碰撞传统优化设计方法计算量大，在碰撞非线性系统优化中常常易导致收敛缓慢甚至不收敛的缺点，在满足了CMVDR294安全法规的同时，使得白车身的扭转模态值得到提高，汽车重量得到较大程度的减轻。

Four 20kg six-month old goats with permanent remen cannula were used to study the effect of three kinds of urease inhibitors acetohydroxamic acid, hydroquinone, yucca extract on nitrogen metabolism, nutrient degradability in rumen and nutrient digestibility.

本研究由4个试验组成，选用安装永久瘘管的6月龄山羊4只，采用4×4拉丁方试验设计，分别饲喂对照组饲粮、乙酰氧肟酸25mg／kg饲粮、丝兰皂甙36mg／kg饲粮、对苯二酚40mg／kg饲粮。

Experiment 2: To choose the appropriate dosage of tannins for the diets in sheep, three High Mountain Fine-wool wethers fitted with permanent rumen fistula were used and the 3 ×3 Latin square design were adopted to study the effects of tannins in Sainfoin on protein protection of the diets, measured items included the rumen metabolic parameters, the appatent digestion of all nutrients and the appatent retention of N in sheep.

试验二：选用3 只安装有永久性瘤胃瘘管的高山细毛羊羯羊，采用3×3 无重复拉丁方试验设计，研究红豆草中单宁对饲粮蛋白质保护的效果，测定项目有绵羊瘤胃代谢参数和饲粮各种养分的消化率与氮存留率，以期初步筛选出绵羊饲粮中适宜的单宁用量，为提高蛋白质饲料的有效利用提供依据。

The results showed that supplying lysine coated with the polyoxylateⅣand hydrogenated vegetable tallow in the rumen could significantly improve the concentration of plasma free lysine in the jugular vein (11.18ug/ml)(P＜0.05), which is about 66.61% of that with duodenal infusions of lysine(16.97ug/ml). The concentrations of free lysine were 7.31ug/ml and 8.00ug/ml with the basal diets and supplementing of Lys in the rumen respectively.

选用4头瘘管肉牛，采用4×4拉丁方设计，结果表明，瘤胃补充用丙烯酸树脂Ⅳ号和氢化植物油保护的赖氨酸26g(15g赖氨酸)，可显著提高肉牛血浆游离赖氨酸浓度(11.18ug／ml)，为十二指肠灌注15g赖氨酸(16.97ug／ml)的66.61％，基础日粮和瘤胃补充15g赖氨酸血浆游离赖氨酸浓度分别为7.31ug／ml，8.00ug／ml。

The reasons for the different feeding effect of dietary starch sources were elucidated from both digestive tract and portal-drained viscera absorpt...

试验1不同淀粉来源对生长猪生产性能、养分消化率及血液生化指标的影响选择45头体重20±0.642kg杜×长×大三元杂交猪，以玉米、早籼稻糙米、糯米和抗性淀粉(Hi-maize-1043)作为淀粉来源，配合4个等氮、等能、等淀粉试验日粮和1个无氮日粮，进行为期30天的饲养试验和5×5拉丁方代谢试验。

Four steers weighted 420,aged 2.5 ~ 3,fitted with permanent cannulate in the rumen,were used in 4×4 Latin square design experiment to determine the effect of different selenium sources(natrium selenite and rumen by-pass selenium) and concentration (0、 0.3 、 0.6、 0.9mg/kg) on nutrients metabolism in rumen.

选用4头体重420kg±20kg，装有永久性瘤胃瘘管的2.5～3岁阉牛，按4×4拉丁方设计，在1.3倍维持需要下，喂以3kg混合精料和6kg玉米秸秆，研究日粮中添加不同硒源不同水平(0mg/kg、0.3mg/kg、0.6mg/kg、0.9mg/kg)对瘤胃营养物质代谢的影响。

Three rumen fistulated Holstein cows were used in a 3×3 Latin square experimental design to determine the rumen degradabihty of NDF and ADF of corn silage at premilk stage, milk stage and dough stage and the effect of diets on rumen environment of cows.

用3头装有永久性瘘管的中国荷斯坦牛，采用3×3拉丁方设计对蜡熟期、乳熟期和乳熟前期的玉米青贮的NDF和ADF进行了瘤胃降解率及其日粮对瘤胃发酵内环境的影响进行了研究。

Three diets with DCAB values of +367,+514 and+663mmol/kg DM, respectively, were designed to study the effects of DCAB on lactational performance, blood acid-base balance and serum mineral contents.

试验选用荷斯坦泌乳早期奶牛15头，采用3X3复拉丁方试验设计，研究日粮DCAB水平分别为+367、+514、+663mmol/kgDM对奶牛生产性能、血液酸碱平衡和血清矿物质含量的影响。

The aim of this study was to examine whether multiple regression analysis technique could be used to measure fecal endogenous outputs and true digestibility of phosphorus in rapeseed meal and soybean meal for growing pigs. 5 Yorkshire × Landrace harrows, with average initial body weight of (21.6±1.43)kg, were allocated to the five experimental diets according to a 5×5 Latin square design. The 5 experimental diets were formulated to contain 5 P level (1.8, 2.7, 3.6, 4.5 and 4.7g/kg), with the rape- seed meal and soybean meal as the mere P source.

为了确定多重线性回归法是否能应用于测定生长猪内源磷排泄量及菜粕和豆粕磷的真消化率，试验选用5头平均质量为(21.6±1.43)kg的健康大白×长白阉公猪为试验动物，采用5×5拉丁方设计，设5个磷水平（1.8， 2.7， 3.6， 4.5和4.79/kg）；日粮以豆粕、葡萄糖、玉米淀粉等为基础，以菜粕为待测植物性饲料，配制半纯合试验日粮，菜粕和豆粕为磷惟一来源。

Methods According to the 4×4 Latin Square design,lytic efficacy was assessed in UK dose[(10 000 U/ml,20 000 U/ml,30 000 U/ml or 40 000 U/ml)]and the timing of Uk infusion(2,4,8,16 h after blood sample taken)and UK lytic time(2,4,8,16 h after UK infusion)in vitro.15 rabbits were subjected to the intracerebral hematoma model for analysing the effect of 2 differents UK dose(10 000 U vs 30 000 U)on brain tissue around hematoma cavity.

目的 探讨尿激酶溶解血凝块的最佳用药剂量、用药时机及药物最佳作用时间，为临床一次性清除血肿提供实验依据。方法采用2个(4×4)拉丁方设计，分析UK剂量[(1万U/ml、2万U/ml、3万U/ml、4万U/ml)]、用药时机(抽血后2、4、8、16 h)和药物作用时间(加UK后2、4、8、16 h)对溶凝效果的影响。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失