单中心的

The parameters for blanching and green- protecting of Opuntia Milpa Alta juice were studiedusing single factor and orthogonal experiment. The results showed that 1.5 times boiling blanching for 1.5min, and the centretemperature reached 93 ℃,not only inactivated the peroxidase, but also increased thecontents of total polyphenolics and soluble solid in the Opuntia Milpa Alta juice, and a well green- pro-tecting effect could be obtained by adding 100 μg/g Zn2+, 40 μg/g Cu2+,0.075 %Vc,0.025 % citricacidin blanc...

通过单因素实验和正交实验，对米邦塔仙人掌制备绿色蔬菜汁饮料的热烫护绿工艺条件进行了研究，结果表明：采用1.5倍体积沸水热烫1.5min，中心温度达93℃，可使过氧化物酶的活力基本丧失，也可提高仙人掌汁中总酚和可溶性固形物的含量，同时在热烫护绿液中加100μg/g的Zn2+、40μg/g的Cu2+、0.075%Vc、0.025%柠檬酸，护色20min，护绿效果好。

Audio engineers refer to a panoramic-potentiometer circuit as a circuit that generates left and right signals of correct amplitudes from a monaural signal and places the signal's image anywhere in a stereo-sound field.

通过区分两个立体声声道之间的单声道信号和在0和M之间改变每个声道的增益，例如在R7的中心位置，每个声道的增益为0.707M。

By using center manifold theorem and normal form of maps, we also present formal proofs of the supercritical flip bifurcation at the bifurcation point. Above this threshold, there is a characteristic sequence of bifurcations, leading to chaotic dynamics, which implies that the dynamical behavior of the single species model with birth pulses are very complex.

利用单参数族映射的中心流形定理、正规型和指数积分函数的性质，得到了具非线性出生率或具密度依赖成熟率的混杂矩阵模型正平衡态的存在性和稳定性、超临界分支以及各种复杂现象甚至混沌。

It is found that the wing crack extend along a curved path and gradually approximate to the line which passes the middle point of the main crack and is parallel to the direction of maximum principal stress.

采用数值和试验的方法对翼型裂纹的扩展路径进行分析，发现单轴下张开型裂纹的翼型裂纹的扩展路径逼近于过原主裂纹中心点、平行于最大主应力的一条直线。

On the basis of the previous results and according to the central composite experimental design principles,the method of response surface method with 3 factors and 3 levels was adopted.then the factors influencing the technological parameters were determined by means of regression analysis.response surface and contour were finally graphed with the extraction rate as the response value.resultsthe optimum conditions of lycium barbarum polysaccharides extraction were as follows:the ratio of material to solvent of 1∶32,extraction temperature of 84℃ and extraction time of 2.3 h,one time extraction.conclusionthe yield of lycium barbarum polysaccharides is 11.10% under the optimum conditions.

方法在单因素实验基础上选取实验因素与水平，根据中心组合（box-benhnken）实验设计原理采用3因素水平的响应面分析法，依据回归分析确定各工艺条件的影响因子，以多糖提取率为响应值作响应面和等高线。结果在分析各个因素的显著性和交互作用后，得出枸杞多糖水浸提的最佳工艺条件为：料液比1∶32；浸提温度84℃；浸提时间2.3h；浸提1次。结论在最佳工艺条件下，枸杞多糖的实际提取率可达11.10%。

The relative permittivity of the Langmuir monolayer on a substrate surface is calculated by the orientation order S with consideration of the length of the permanent dipoles within domain and the distance between the dipole and the substrate.

计算结果表明：对于成份一定的稳定构型单分子层膜，其相对电容率大小除了依赖于分子密度和基底物质的相对电容率外，对分子负电荷中心离基底的距离，以及考虑电偶极子长度的分子区域大小也有不同程度的依赖

The main results are listed as following: 1. Phylogeographic study on Croomia The relationships and distribution of cpDNA haplotypes suggested that Croomia had been widely distributed in ancient eastern Asian and northern American; the origin and distribution center of Croomia were concentrated on the mountains comprised Mt.

Croomia亲缘地理学根据叶绿体DNA(trnL-F、atpB-rbcL)单倍型的关系和分布推测，Croomia在古欧亚大陆和古北美大陆有着较广泛的分布；我国的黄山和天目山一带是Croomia的分布、起源中心，其散布路线是从中国大陆到日本，再到美洲古大陆；北美种群与东亚种群分离较早；东亚种的分化时间比较晚。

For the extraction of Morchella esculenta polysaccharide, the factors affected extraction at different stages were declared by response surface methodology with three factors and three levels according to Box-Benhnken theory for center united experiments.

针对羊肚菌多糖的提取，通过单因素实验，根据Box-Benhnken的中心组合实验设计原理，采用3因素3水平的响应面分析法，确定各工艺条件的影响因子，以羊肚菌多糖提取率为响应值作响应面和等高线图。

Interior doors imported from Germany HOMAG production line, wood door wood door Xi development projects, has purchased the German CNC machining center, vertical axis milling wood, high Precision Panel Saw, Automatic desktop multi-chip saw, intelligent automatic Door Edge machine, automatic doors cold press, professional woodworking surface coating machines, vacuum hot press, high-precision double-side trimming mortising machine, horizontal milling slot machine, professional paint room doors, etc. a large number of advanced professional equipment for doors, a fundamental guarantee for the companys processing capacity and product precision; German master design, the latest German-made gate technology, a fundamental safeguard the Xi pure German descent forest gate.

公司引进德国HOMAG室内门生产线，开发熙林木门木门生产项目，先后购进德国电脑数控加工中心、立式单轴木工铣、高精密裁板锯、全自动台式多片锯、智能全自动木门封边机、全自动木门冷压机、专业木工曲面包覆机、真空热压机、高精密双端齐边开榫机、卧式高速铣槽机、专业木门烤漆房等一大批先进的专业制门设备，从根本上保证了公司的加工能力和产品的加工精度；德国大师级设计，德国最新造门工艺，从根本上保障了熙林木门的纯正德国血统。

The stretching influence on the near trusses should be considered when using the stretching-twice method, and the construction is hard to be controlled. The Harbin exhibition sports center with a 128m support span, attached to a deep design calculation of the super-large span prestress truss string structure, stretching once in tension bed method is brought forward for the bottom cable of the single truss string structure. From calculation research on the friction force between the tension bed and the truss string structure, the friction influence is considered for the displacement method of the middle of span, with the action of the fixed cable stress. This method, with vertical displacement of the middle of span as its main control target for prestress stretching, is successfully applied in the prestress stretching construction of the project.

二次张拉需考虑张拉对相邻桁架的影响，施工控制难度大，本文结合哈尔滨会展体育中心支座跨度128m的超大跨度预应力张弦桁架结构的深化设计计算，提出了单榀张弦桁架下弦拉索胎架一次张拉法施工方法，通过对张拉阶段胎架与张弦桁架间摩擦力的计算研究，定量索力下跨中位移法考虑摩擦力影响，以跨中竖向位移作为预应力张拉的主要控制指标，成功地完成了该工程预应力张拉施工。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。