更为严重的是，如果把年龄和学科联系起来，很多组合都表明孩子们得到的帮助越多，功课就越差。
Damningly, in many combinations of age and subject, the more help children got, the less well they did.
但若组合里只有股票和债券，我的标准差会高得多。
But if I would confine myself just to stocks and bonds, then I would get a much higher standard deviation.
连接差速压力开关线至组合阀。
Connect differential pressure switch wire to the combination valve.
利用这一特性，把两个万向节机构和圆柱齿轮机构组合形成了叶片差速泵的驱动系统。
By using the characteristics, the combination of two Hooke's joints with cylindrical gear mechanisms forms the driving system of a differential velocity vane pump.
采用组合式数字阀作为主要流量控制元件，构建差压铸造液面加压控制系统。
The fluid surface forcing control system applied on counter pressure casting is built based on the combined digital valve as the main flow control component.
文章最后对流量、流量与压差的关系及不同螺杆组合对流量的影响进行了实验验证。
At last, flow rate, the influence of pressure difference and screw combination on flow rate were confirmed by experiments.
由于过程特性的特殊性，常规pid控制算法和人工智能方法不能对组合积分系统进行有效的控制，控制精度差，有时甚至难于进行闭环控制。
Due to the speciality of the process, it is not effective to control combined integrating systems and leads to bad control accuracy with PID control algorithm or artificial intelligence method.
社会是有各种各样需求的人的组合，人们千差万别，通过各种渠道寻求满足。
Society is a combination of persons with varieties of demands to be fulfilled by kinds of channels.
基于组合函数的差分特性，提出了一种新型的再同步攻击方法。
We propose a new resynchronization attack based on the difference performances of combinational functions.
研究了配副硬度差与磨损率的关系，根据这种关系确定了最佳配副组合。
By investigating the relations of hardness difference to wear rate, the best friction pair mate was ascertained.
与对照(清水)相比，该组合可以较好地抑制鲜切荸荠的褐变，但略差于0.1%亚硫酸氢钠的处理。
Compared with treatment with 0.1% NaHSO3 and the control with water, it was a good inhibition combination.
本文提出依据随机参数的均值和标准差取值，将各随机参数取值组合后再用模拟法计算失效概率。
This paper proposed that according to random variables mean value & standard deviation, its values are determined and are combined, then the failure probability is calculated by simulation.
从双差模糊度的定义出发，分析了双差模糊度组合的几种常用方式；
Several typical combinations of double-difference ambiguities are analyzed from the definition of the double-difference ambiguity.
该系统通过综合技术将惯性导航系统与差分GPS有效组合，不仅定位精度高、工作可靠，而且输出信息实时、连续；
The system, by effectively integrating INS/DGPS, is not only with high positioning accuracy and working reliability, but also outputs real time and continuous information.
提出了基于改进的BP神经网络学习算法和自适应残差补偿算法的炼铜转炉吹炼终点组合预报模型。
It is the first time that a converting furnace endpoint prediction model based on an improved BP neural network and error compensation of linear regression.
利用基线约束剔除不合理的整周模糊度组合，通过残差列表获取最优模糊度，并引入历史检测。
Unreasonable ambiguities are rejected according to base-line and the best ambiguity is achieved by error list and the historical test is introduced.
给出了同阶差分格式线性组合的性质，从而可设计出更多收敛的多参数曲线细分格式。
Furthermore, the property of the linear combination of the difference schemes of the same order is analyzed, which can help to devise more convergent curve subdivision schemes with several parameters.
针对炼油废碱液污染浓度高、可生化性差的特点，采用水解与接触氧化组合工艺进行处理。
Aiming at serious pollution and no good biochemical quality in refinery alkalinity waste liquid, using hydrolysis-contact oxidation process to treat it.
针对全组合系统进行了研究，建立了相应的误差模型和系统观测模型，特别是组合系统下的GPS载波相位双差观测模型。
Such a system is discussed in this paper, and the corresponding error model and measurement model, especially double-differenced GPS carrier phase model are set up.
重建宽频带信号的唯一办法就是按照正确的时间差把它的所有窄频带组成部分组合起来。
The only way to reconstruct a broad-band signal is to add its narrow-band components together by taking into account the correct time-lag between them.
在接收方式下，选择面板组合器的和通道或差通道作为工作通道。
In a receive mode, either the sum channel or a difference channel of the panel combiner is chosen as the active channel.
生产组合花纹板的关键在于使不同形状花纹高度差尽可能地小。
The crux in producing the strip is to reduce the difference in heights between various patterns as small as possible.
反向组合算法是最有效的图像对齐算法之一，但该算法抗干扰能力差。
Inverse Compositional algorithm is one of the most efficient image alignment algorithms, but the ability of anti-jamming of the algorithm needs to be improved.
本发明的组合物在将粉末成分和水溶液混合后凝固形 成结晶差的磷灰石磷酸钙。
The composition of the invention sets to poorly crystalline apatitic calcium phosphate after mixing a powder component and an aqueous solution.
在利用股指期货对股票组合进行套期保值时，可能面临各种风险，其中，基差风险是套期保值者面临的最主要风险。
Many kinds of risks may be faced with when investors use stock index futures to hedge the stock portfolio.
为了降低套期保值交易的基点差风险，本文提出了利用多种股票指数期货对股票组合进行复合套期保值的策略，并给出了套期保值成本相同和限制套期保值成本两种情况下的套期保值率公式。
To reduce the basis risk, this thesis offers a compound hedge policy on stock index futures and deduces the expressions of the hedge ratio in two instances when the cost is same or restricted.
本文利用布尔差分的性质，给出了一种不同于传统的求组合逻辑线路故障测试码的新方法，对故障测试有一定的简化作用。
The properties of Boolean difference are made use of to derive a new method for fault testing in combinational logic circuits. This method is simpler and different from the traditional one.
本文利用布尔差分的性质，给出了一种不同于传统的求组合逻辑线路故障测试码的新方法，对故障测试有一定的简化作用。
The properties of Boolean difference are made use of to derive a new method for fault testing in combinational logic circuits. This method is simpler and different from the traditional one.
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