循环

The m-sequence with Cyclic Prefix is inserted between OFDM symbols in time domain as training sequence. The cross-correlation is calculated between the received sequence with CP removed and the appointed circular shifted m-sequence, which takes reliability of the estimation of channel impulse response on account of the two-valued auto-correlation property of the m-sequence, thereby the channel frequency response can be advisably decided.

在时域OFDM符号之间插入附加循环前缀的m序列作为训练序列，在接收端将去掉循环前缀的接收序列与指定的循环移位m序列作相关运算，然后利用m序列的二值自相关特性获得信道的冲激响应估计，从而得到信道的频率响应估计。

The relation between soil acidification and nitrogen cycle disturbed by man made factors was studied from the viewpoint of biogeochemical cycle, and the mechanism of soil acidification induced by disturbed nitrogen cycle was probed.

从生物地球化学循环的观点出发，研究了 N 循环的人为干扰与土壤酸化的关系，并探讨了 N 循环扰动下导致土壤酸化的机理。

In order to reduce the erosion of water-wall,large furnace sectional area should be selected by boiler works,and the power plant should select the coal caloricity close to the designed for use.

对于循环流化床锅炉，炉膛截面积选择的大小影响炉内循环物料的速度，即水冷壁的磨损速度，燃料的发热量影响炉内循环物料的浓度。

Carry out the performance of circular economy to evaluate a company, the article discussed the enterprise of circular economy to evaluate the characteristic of index, principle and administrative levels, gave out the structure of the system of quota of company performance assessment of circular economy and its assessment technique.

为了评价企业实施循环经济的绩效，本文探讨了循环经济的企业评价指标的特点、原则和层次，给出了循环经济的企业绩效评价指标体系的结构及其评价方法。

When scaled factor circulant matrices are nonsingular, we can find the single solution of the scaled factor circulant matrix equation; When scaled factor circulant matrices are singular, we can find the special as well as the general solution of the scaled factor circulant matrix equation; There is only an error of approximation when the fast algorithm is implemented on computers, and only the elements in the first row of the scaled factor circulant matrix and the constants in the diagonal matrix are needed by the fast algorithm.

当鳞状因子循环矩阵非奇异时，该快速算法求出线性方程组的唯一解；当鳞状因子循环矩阵奇异时，该快速算法求出线性方程组的特解与通解。该快速算法仅用到鳞状因子循环矩阵的第一行元素及对角矩阵中的对角上的常数进行计算。在计算机上实现时只有舍入误差。

Since any n x n doubly stochastic circulant matrix has a unique representation as a polynomial of degree n - 1 in the shift operator wn, the classification problem of primes in the doubly stochastic circulant matrices can be reduced to the solution of an equation over a doubly stochastic circulant matrix.

由于任一n阶双随机循环矩阵都可以唯一地表示为移位的n-1次一元多项式，从而可把双随机循环矩阵中素元的分类问题简化为解双随机循环矩阵上的一个方程。

In order to enhance the efficiency of the seawater refrigerant and heat pump system, the cycle is modified to approach Carnot cycle because Carnot cycle is most effective.

本文首先对海水制冷热泵装置的循环与节能特性进行了分析，研究了制冷热泵循环指标随冷热源温度变化的规律，并以卡诺循环为目标，对海水制冷热泵装置的循环改进进行了分析。

In addition, you can use a number of combined cycle, such as mercury - a class 2 water steam cycle, steam - gas-fired combined cycle and so on to get closer to Carnot cycle in order to achieve higher thermal efficiency.

此外，还可以采用一些联合循环，如汞—水之类的两汽循环、蒸汽—燃气联合循环等来接近卡诺循环以达到更高的热效率。

Starting from the graphs of P-V and T-S and the second law of thermodynamics, and on different aspects and with different methods, this article studies the maximum value of the efficiency of heat engine in the process of arbitrary cycles, and presents the conclusion that the efficiency of the heat engine in Carnot cycle is the greatest among all arbitrary cycles.

卡诺定理给出了热机的循环效率极大值问题。由P-V图、T-S图、热力学第二定律出发，从不同的角度，采用不同的方法，对任意循环过程的热机效率极大值问题进行了研究，证明了任意循环过程热机效率以卡诺循环的热机效率为最大极限值的结论

Performance of heat pipe for waste heat lithium-bromide refrigerator driven by exhaust gas of diesel engine;2. When refrigerator s and heat pumps run along Carnot cycle, their energy efficiency is highest.

对利用适宜的循环工质实现蒸气压缩式制冷热泵近卡诺循环进行了分析，包括基本思路、可行性分析、典型工质及其特性，并在相同设备条件和工作温度下，对近卡诺循环制冷热泵和普通循环制冷热泵(R22为工质)的效率进行了计算比较，最后对进一步需做的工作进行了探讨。

What are your goals and strategies for growth?

你的成长目标和策略是什么？

And unto the angel of the church in Sardis write; These things saith he that hath the seven irits of God, and the seven star I know thy works, that thou hast a name that thou livest, and art dead.

3：1 你要写信给撒狄教会的使者，说，那有神的七灵和七星的，说，我知道你的行为，按名你是活的，其实是死的。