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Low molecular weight mannuronic acid, guluronic acid and κ-carrageenan were prepared from algin and carrageenan by the acid hydrolysis method, and their weight average molecular weights and the distribution widths of molecular weight were determined by high performance gel permeation chromatography respectively.

本文以褐藻胶和κ-卡拉胶为原料通过酸水解分别获得了低聚的甘露糖醛酸，古罗糖醛酸和低聚κ-卡拉胶，并采用HPGPC法测定了这3种低聚糖的重均分子量。

the effect of inertia weight on particle swarm optimization is studied,on basis of which adopts four kinds of strategies of inertia weight to regulate the speed of a new quantum delta potential well based particle swarm optimization.a faster and more stabile algorithm,found by comparing the performances of four equations regulated the inertia weight,solves 0/1 knapsack problem.the result of experiment shows that the modified algorithm improves the precision of optimal solution and has a faster speed and a higher efficiency in convergence.in a word,choosing a parameter of inertia weight suitably can improve the performance of new qdpso.

摘 要：在研究惯性权重对基本pso算法影响的基础上，根据惯性权重对粒子群算法影响的特点，采用4种惯性权重策略对一种新的具有量子行为的粒子群算法的速度进行调节，比较每种算法的性能，从中找到一种新的性能更好的改进算法，将其用于求解0-1背包问题。实验结果表明较好地选择惯性权重参数对算法的性能有很大提高，该改进算法在求解0-1背包问题中具有高效性，提高了最优解的精度，同时具有较快的收敛速度。

The physiology characters of the leaf of ear in different periods have been studied It is showed that the water content and protein content,leaf_area and protein weight per square of leaf of ear from silking to 42d after silking all reduce gradually , but dry-weight and leaf -area did not do The correlate analysis showed that the protein content of leaf of ear in different periods and protein- weight per square did not correlate significantly with protein content of seed Dry weight of leaf of ear was ...

研究不同时期穗位叶的部分生理性状表明：从吐丝期至其后 4 2d ，穗位叶的含水量、单位叶面积、蛋白质含量和单位叶面积蛋白质重量均呈现一个逐渐下降的趋势；穗位叶叶片干重和叶面积基本保持不变。相关分析表明，不同时期穗位叶的蛋白质含量、单位叶面积蛋白质重量与子粒蛋白质含量无关，而吐丝期穗位叶干重和子粒蛋白质含量呈显著正相关

If the set weight need to be changed, you can control the lift weight according to the screw pillar's position in the 750-1000kg When adjust, loosen the locknut, every a ring going up, the set lifting weight can add 200kg, every a ring going down, the set lifting weight can reduce 200kg

4.2.3如需改变设定重量，可以在750-1000㎏范围以内，根据调整螺柱的位置不控制起升重量(调整时，先松开锁紧帽，调整每上行转一圈，原设定起重载重量增加200㎏，每下行转一圈原设定载重量减少200㎏，调整好后，用锁紧帽锁紧)。

The closest period of time everyday the snapshot circumstance of the website, website already a few months Baidu from collect experienced 10 days now half month updates snapshot to arrive 24 hours to update again to a week, update a few pages to update several much pages to from, arrive 24 hours from 24 hours of a few pages the snapshot of 200 much pages, this paragraph of time understands eventually, to Baidu snapshot should update ability 24 hours to be have weight, baidu did not use PR value to measure the weight of a website like Gu Ge, what does that use, I feel to return is the time that snapshot updates, the jump overing that a website updates in 24 hours has weight more more, because do not think what giving just is Baidu weight really, cannot use PR to see, of course this is pure belong to an individual close a point.

最近一段时间每天网站的快照情况，网站已经几个月了百度从收录到现在经历了十天半个月更新一次快照到一个星期再到24小时更新，从一次更新几页到一次更新数多页，从24小时几页到24小时200多页的快照，这段时间终于明白，对百度来说快照要24小时更新才算是有权重，百度没有像谷歌一样用PR值来衡量一个网站的权重，那用什么呢，我觉得还是快照更新的时间，一个网站在24小时更新的越多就越有权重，因为实在想不出什么才是百度权重，不能用PR一下看出来，当然这纯属个人的关点。

Description of exhibited parts: Machine tool Bed, Weight 8275kg; Construction Machinery casting, Weight, 130kgh; Printing machine frame, Weight 1050kg; Air compressor housing, Weight 450kg.

产品/Product：本次展品：机床床身（重8275kg）、工程机械箱体（重130kg）、印刷机械本体（重1050kg）、制冷空压机机体（重450kg）。杭机铸造是一家年产50000吨铸件的专业铸造集团企业，技术先进、实力雄厚，产品多次获得各类嘉奖。

Treatments were as follows: fertilization during leaf-expansion period, fertilization during green-leaf period, and no fertilizer. Results showed that individual leaf area, thousand-leaf weight, and leaf distribution were relatively stable with little influence from fertilization. Fertilization during leaf-expansion compared to the green leaf period significantly increased leaf number, leaf weight per plant, and leaf area index. Fertilization during led-expansion also significantly increased the total weight of leaves corresponding to each branch. The 14th to the 17th branches had the largest number of leaves in the canopy with fertilization increasing the weight of each branch but not changing the center of the canopy.

结果表明：毛竹单叶面积、千叶质量和叶片分布受施肥的影响较小，是较为稳定的指标；展叶期施肥处理（处理1）能显著增加单株立竹的叶片数量，到7月底，其单株立竹叶片总质量和叶面积指数分别比绿叶期施肥（处理2）提高14.8%和13.7%，比不施肥提高27.6%和24.5%；冠层14~17档是单枝叶片数量最多的区域，施肥能增加各枝盘叶片的质量，但对林冠重心的分布无影响；单叶叶面积稳定后（6月），处理1的叶绿素测定值和光合速率显著高于处理2和对照，而处理2与对照间无显著差异。

The utility model in the pen with the tail weight block, the weight block so-tail body weight than the weight of the head. When T tumble to the ground, tail-first with pen to avoid a first portion to effectively prevent damage to the tip of a pencil. reduce waste.

本实用新型由于在笔杆尾部设有配重块，该配重块使笔身尾部重量大于头部重量，当笔滚落到地上时，笔杆尾部先着地，避免笔尖先着地，有效防止笔尖损坏，减少浪费。

The results showed that the antlions fed on M. domestica larvae obtained significantly higher body weight, pupal weight, relative growth rate and pupation percentage, and significantly shortened larval duration when compared with the antlions fed on S. litura and S. exigu larvae. When feeding on C. cephalonica larvae, antlions had similar body weight, pupal weight and pupation percentage, but significantly decreased relative growth rate and prolonged larval duration, than those fed on M. domestica larvae.

结果显示，用家蝇幼虫饲养的蚁狮，其体重增长、相对生长率、化蛹率、蛹重均显著高于用斜纹夜蛾和甜菜夜蛾幼虫饲养的蚁狮，而幼虫历期则比斜纹夜蛾和甜菜夜蛾幼虫饲养的短；用米蛾幼虫饲养，虽然蚁狮体重增长、化蛹率和蛹重与用家蝇幼虫饲养的差异不显著，但其相对生长率却显著低于用家蝇幼虫饲养的蚁狮，幼虫历期也比用家蝇幼虫饲养的明显延长。

In the 94~108 kg body weight stage, except that between carcass weight, average fatback thickness, bond percentage, marbling score, IMF, crude protein and the body weight there were extremely remarkable or remarkable return relations, there was no remarkable linear correlation between other indexes and the body weight.

在94~108 kg阶段，除胴体重、平均背膘厚、骨骼率、大理石纹、肌内脂肪、蛋白质与体重之间呈极显著或显著的回归关系外，其它各项指标与体重间的线性相关不明显。

The dynamic variation in content of cndogenous abscisic acid,indoleacetic acid,gibberellinsand isopentenyladenodines of normal juvenilefruit and dropped fruit was measured with enzyme linked immunosorbent assayin the course of physiological fruit drop of 'Shuizhang Longan.

应用酶联免疫法测定了水涨龙眼生理落果期间正常幼果和脱落幼果中内源激素ABA、IAA、GAs及iPAs含量的变化。

Zillions of code examples on the web.

网上数量巨大的代码例程。