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Automatic threshold choice is difficult and important to color images edge detection, First of all, on the base of human visual properties, threshold versus intensity function of human visual system are researched and analyzed, by using method of mathematic modeling and the result of saturation research, function of least color difference that can be perceptible by visual systems in detecting edge is given.

摘要自动阀值选取是彩色图像边缘检测的难点和关键问题，首先从人类的视觉特性出发，分析了人类视觉系统的亮度感知门限函数，利用数学建模方法和色度学方面的研究成果，给出人类视觉系统对彩色图像边缘所能识别的最小彩色差函数。

The same is true for graph s of total rainfall versus total storm runoff.

总雨量与总暴雨经流量之间的曲线关系也同样如此。

A nonlinear cost function is a cost function in which the graph of total costs versus the level of a single activity is not a straight line within the relevant range.

在经济规模考量下，其成本在作业水准的各个范围内维持不变，当作业水准变到另一个水准时，成本数额增加的速度较为缓慢。

Plot the logarithms of the cumulative trimethylamine concentrations (0.50, 1.50, 2.50, and 5.00μg per mL) versus potential, in mV, and determine the slope of the Standard response line for the electrode.

划出累积的三甲胺浓度(0.50，1.50，2.50，and 5.00μg per mL)对数表与其相对的电势mV。得出电极标准响应线的斜率。

Chat with the Devs: As of recent, the Dev Team has added a new ability to the Protoss Carrier that will give it a little more Umph! versus Zerg Corruptor attacks or Viking raids.

开发团队如是说：现在神族航母加入了一些新元素，想要用虫族腐蚀者或者人族维京轻松搞定他们的人要有麻烦了。

StevenPage : Well, I've read about the perceived differences between the bleached versus the unbleached filters, which I haven't yet compared.

好吧，我已经读到过漂白过的滤纸和没有漂白过的滤纸的不同感知，但是我还没有对比过。

Exhibit open body language with: 1 open arms versus closed across the chest or hands clasped together, 2 hands kept in sight (not behind you or in your pockets) and open, and 3 legs uncrossed with feet flat on the floor, while seated.

表达开放的肢体语言：(1)双臂在身体两侧，而不是胸前收拢、或双手紧握(2)手放在看的见的地方（不是放在身后或口袋中还有(3)座时双腿平放在地面而不是交叉。

In this thesis, rat-tails were used as experiment objects, there are 40 slices including transverse and longitudinal, HE-dyed and undyed. Excited by femtosecond laser, the changes of backward SHG and TPEF versus sample preparation, excitation wavelength, excitation power, penetration depth and so on were observed by two-photon laser scanning confocal microscope, effect factors of backward SHG and TPEF and differences of both were discussed and compared, and related comments were also presented.

以鼠尾组织作为实验对象，共40个切片，分为横向和纵向、HE染色和未染色四组，采用飞秒激光器作为激发光，用双光于激光扫描共焦显微镜(two-photon laser scanning confocal microscope， TPLSCM)观察和分析了样品在不同的制备方式、激发波长、激发功率、扫描深度等条件下的背向SHG和TPEF的变化曲线，讨论和比较了生物组织的背向SHG和TPEF的影响因素以及二者之间的异同，并尝试对实验现象做出了一定的解释。

Kang Youwei's Changing Thoughts on a Bicameral versus a Unicameral Assembly after Fifth and Sixth MemorialsIn Reform Movement of 1895-1898, Kang Youwei's political thoughts revolved around his perspective and concern regarding the parliamentary system.

在戊戌政变时期，康有为的政治思想主要围绕着议会体系有关问题而提出并阐述维新派的政治主张和要求。

He describes the main thrust of the game as "informed minority versus uniformed majority."

他描述这个游戏的本质就是"知道真相的一小撮人对抗一无所知的大多数人"。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。