查询词典 over-population problem

Aiming at these problems, an expectation maximum based MAP algorithm is proposed and the performance is analyzed. The proposed algorithm avoids large matrix operations by using the EM algorithm to decompose the MIMO channel estimation problem into a series of single input single output problems. Besides, a joint estimation is carried out over multiple OFDM symbols in order to enhance the data transmission efficiency and the estimative performance of the proposed algorithm.

该算法利用EM算法把多输入输出信道估计问题化简为一系列独立的单输入输出问题，避免了大规模矩阵运算，降低了MAP算法的计算复杂度；为进一步改善MAP算法的数据传输效率及其估计性能，可通过对多个连续的OFDM符号进行联合信道估计。

Over the past few months, we have seen the exacerbation of the Subprime problem accelerate at a precipitous pace.

在过去的几个月里，我们看到了恶化的次级债问题，在以仓促的步伐加快。

Describes the key exchange algorithm based on the discrete logarithm problem of elliptic curve over Galois Field.

根据已有的理论结果，本文提出并实现了群上密钥交换安全公钥参数的三类生成算法。

The overall sales of cosmetics in2005 are over 68 billion RMB. The survey by CCA shows that 40% consumersconsider false propaganda as the key problem. 85.1% consumers show distrust in thecosmetics advertisements with an image of celebrity.

但中国消费者协会调查结果显示，四成以上的消费者认为当前化妆品市场存在的最主要问题是"虚假宣传"，85.1％的消费者对名人代言的美容化妆品广告表示了不信任。

The existence and development of the ferroalloy company has become the major problem that CEOs have to think over.

铁合金企业如何生存和发展已经成为企业经营者们不得不认真思考的问题。

When there are many coal beds and many kinds of coal and different property of coal in the same ore district, how to define the structure of coal dressing product,it's the problem which the specialized field of coal dressing technical personnel often think over .

当同一矿区具有多煤层、多煤种、不同特性的原煤时，如何确定选煤产品结构，使资源得到合理利用、使企业得到最大利润，是选煤专业的技术人员经常考虑的问题。

They do best when the fish are schooled over a particular structure.The problem that usually arise with fishing with a worm is the inability to sense strikes.

他们最好当鱼舞团超过某一结构的问题，往往出现了蠕虫与钓鱼是无力感罢工。

Nowadays environmental education is at large attached importance to all over the world. It is considered to radically solve the increasingly flinty environmental problem. And it is the only way to realize continual development in human society.

环境教育是当前世界各国普遍重视的教育领域，被视为从根本上解决日益严峻的环境问题，实现人类社会可持续发展的一条必由之路。

Vitrectomy is only carried out in rare cases, because there are risks associated with eye surgery, and floaters generally become less of a problem over time.

玻璃体切除术是只进行了在极少数情况下，因为还有相关的风险与眼科手术，飞蚊症普遍成为少的问题，随着时间的推移。

Over 80 percent of the enterprises have the problem lacking floating capital.

资金困难成为制约中小企业发展的关键因素。

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％。