等倍数

"Zhang Jian Qiu count as" Communication is the question 92, the achievements of the more prominent and there is the common denominator least common multiple of the calculation, the arithmetic progression of the problem to solve, some uncertainties, such as problem solving equation.

张丘建算经》现传本有92问，比较突出的成就有最大公约数与最小公倍数的计算，各种等差数列问题的解决、某些不定方程问题求解等。

The technique and process for producing differential dyeable and bi-shringkage PET textured yarn are introduced with disscussion on the differential dyeing and shringking mechanism and influence of speed in spinning,spinning temperature,lateral blowing, temperature and humidity of the quench air,spin-finish and its take-up, cold-draw ratio and ratio.

介绍了异染异缩型涤纶变形丝的生产技术及工艺流程，讨论分析了异染、异缩原理和纺丝速度、纺丝温度、侧吹风风速、风温、风湿；纺丝油剂及上油率；冷拉伸倍数、拉伸倍数、拉伸温度、定型温度等工艺参数对其品质和异染、异缩效果的影响。

According to"Coal mine Safety regulation"the request,this article mainly analyzes the relation between the hoist's brake torque and brake deceleration in the equipollent tail rope promotion system,produced the relational curve of deceleration and the gravity characteristic coefficient and the braking moment multiple.

根据《煤矿安全规程》的要求，通过对在等重尾绳提升系统中制动力矩与制动减速度关系的分析，给出了减速度与重力特性系数和制动力矩倍数的关系曲线。

For example, if the haploid number is 7, the euploid number would be 7,14,21,28, etc, and there would be equal numbers of each different chromosome.

例如，一种生物单倍体染色体数目是7，整倍数将是7、14、21、28等数目，并且每条不同的染色体有相等的数目。

Greater confidence about future prospects is reflected in PER multiples of between 10 and 14 times prospective earnings.

更大的信心，对未来的前景是体现在每倍数介乎10至14倍的准收入等。

It turned out reproduction rete of chrysanthemum was raised,the regular,non-plant diseases and insect pests could be offered to the market. Shoot tip were used as explants to study the effects of different sterilization methods, illumination intensity and concentrations of 6-BA and NAA on shoot propagation. Rooting with perlite, vermiculite and river sand instead of agar was studied. In the process of preliminary multiplication, the effect of using 0.1% HgCl_2 in sterilization of explants was better than using saturated bleaching solution. The highest multiplication rate was found under whole illumination. MS media with 6-BA from 0.2 mg·L~(-1) to 5 mg·L~(-1) and NAA from 0.05 mg·L~(-1) to 2 mg·L~(-1) were tested and as a result, the highest differentiation rate and the multiplication rate was reached with 0.2 mg·L~(-1) 6-BA, 0.05 mg·L~(-1) NAA.

本实验以菊花的茎尖为外植体，研究了不同灭菌方法，光照强度，全光照、半光照和弱光处理以及不同6-BA和NAA浓度及配比对于试管苗增殖的影响，并研究了珍珠岩、蛭石和河砂等琼脂替代物对于菊花生根的影响，结果表明：在初代培养物建立的过程中采用0.1％升汞进行表面灭菌的效果好于饱和漂白粉的灭菌效果；在全光照条件下外植体的增殖倍数最高；在试管苗增殖培养的过程中，以MS为基本培养基，并在培养基中添加0.2～5mg·L~(-1)6-BA和0.05～2mg·L~(-1)NAA，其中0.2mg·L~(-1)6-BA和0.05mg·L~(-1)NAA最适于外植体的分化和增殖，其分化率为100％，增殖倍数为12。

The results showed the crystallinity of the modified PET decreased with the increase of the content of NPG, but the heat shrinkability was improved obviously. Amorphous polyester material that woul...

结果表明，通过NPG共聚改性的PET的结晶能力随NPG用量的增加而降低，热收缩能力有了明显的提高；无定型区增大，获得了在通常情况下不能结晶的PET无定型材料，从而使改性PET薄膜在拉伸时保持较高的取向度，并在高于其Tg时发生解取向热收缩；拉伸温度、拉伸倍数等拉伸工艺对于聚酯薄膜的热收缩率有着显著的影响。

The results showed the crystallinity of the modified PET decreased with the increase of the content of NPG, but the heat shrinkability was improved obviously. Amorphous polyester material that would not crystallize under usual circumstances was obtained, which made the modified PET film to be able to achieve a high degree of orientation during stretching, and it was heat shrinkable when the ambient temperature was higher than its T the effects of different drawing temperature and DR on heat shrinkage of copolyester film was discussed.

结果表明，通过NPG共聚改性的PET的结晶能力随NPG用量的增加而降低，热收缩能力有了明显的提高；无定型区增大，获得了在通常情况下不能结晶的PET无定型材料，从而使改性PET薄膜在拉伸时保持较高的取向度，并在高于其T时发生解取向热收缩；拉伸温度、拉伸倍数等拉伸工艺对于聚酯薄膜的热收缩率有着显著的影响。

The relation between quiescent point and voltage gain,input resistance,output resistance, maximum nondistortion output voltage ,dynamics parameter in amplifier is discussed by commom-emitter fixed-bias amplifier,the effective methods to improve voltage gain are deduced,and how to set reasonale quiescent point′s position based on amplifier′ different is also presented finally.

以共射固定偏置放大电路为例讨论放大电路中静态工作点与电压放大倍数、输入电阻、输出电阻、最大不失真输出电压等动态参数的关系，得出提高电压放大倍数的有效方法。

This product is at the micro-organisms are dormant, to preserve the stability of easily put into the water body, the dormant viable recovery and will soon collapse and the multiplier into a dominant population reproduction, the rapid decomposition of organic pollutants in water, the elimination of amino nitrogen in the water , nitroso nitrogen, hydrogen sulfide and other harmful substances, and single-cell algae into the source of nutrition, the promotion of diatoms, green algae, such as good growth, inhibit the propagation of harmful algae, play a role in the rapid fertilizer, at the same time can increase the dissolved oxygen water, purification at the end of quality, improve water quality.

本品微生物均处于休眠状态，稳定而易保存，投放到水体后，休眠活菌能很快复苏和崩解，并以倍数繁殖成优势种群，迅速分解水体中的有机污染物，消除水中氨基氮、亚硝基氮、硫化氢等有害物质，并将其转化为单细胞藻类的营养源，促进硅藻、绿藻等优良藻类的生长，抑制有害藻类的繁殖，起到迅速肥水的作用，同时能增加水体溶氧，净化底质，改善水质。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐