有利于

Researched influence of frequency on characteristic of electromagnetic wave transmission in tunnels, and analyzed characteristic of electromagnetic wave transmission in circular, arches and curved tunnels by method of metal wave guide, and gives approximate formulas of attenuation rate. Main conclusions we obtain are as follows: in circular,rches tunnels, if frequency is higher, attenuation rate is smaller, it is beneficial for EM waves to transmit, in curved tunnel, higher frequency, more attenuation rate ...

研究了频率对井下电磁波传输特性的影响，采用金属波导法分析了圆形、拱形及弯曲隧道中电磁波的传输特性并给出衰减率近似公式，得出主要结论：在圆形和拱形隧道中，频率越高，衰减率越小，越有利于电磁波的传播；在弯曲隧道中，频率越高，衰减率越大，不利于电磁波的传播；通过特性曲线与井下实验数据相比较得出在900MHz左右为井下无线通信系统传输信号最佳频段。

1Niche construction can lead to stable coexistence of diverse genotypes in spatially structured population, which supports a stable polymorphism even without heterozygote superiority.(2)With habitat deterioration, niche construction accelerates the formation of steady polymorphism and hence impedes the harmful influences of environment on the population, which might embody a life-history strategy of organism under the unfavorable environment.(3)Niche construction results in the coexistence with alternative polymorphism through genotype-environment feedback and limited gene flow.(4)The niche-constructing organism is an active force to alter its environment and hence the direction of natural selection in order to better survival.(5)Spatial dynamics and distribution pattern of metapopulation are profoundly influenced by time-lagged niche construction.(6)Metapopulation size can reach a fixed level in the recency effect and equal weighting of time lag but is statistical stability in primacy effect, which implies the primacy effect is most remarkable.(7)The increment in the relative weightingof each generation\' niche construction and the length of time lag are significant factors for system destabilization.(8)Moderate capacity of positive niche construction benefits the metapopulation persistence.(9)The narrowing of niche breadth can decrease the metapopulation size and thereby increase the extinction risk.(10)The coupled function of time lag and niche construction make the system oscillation and generate the spiral wave, spiral-broken and circular wave in heterogeneous habitat.The spatial distributions of metapopulation and resource content are complementary due to a phase lag of their both frequencies.(12)Metapopulation persistence with niche construction depends not only on the balance between colonization and extinction, but also on the balance between the ability of niche construction and natural dissipation of habitat.(13)Metapopula-tion can survive under certain condition when the percent of suitable patches in habitat is lower than the ration of extinction to colonization.(14)Two thresholds exist in the process of transition of habitat quality dynamics from unsuitable to suitable, which include the intensity of niche construction and the initial condition of system.(15)Metapopulation size is positive correlated with the ability of positive niche construction, which means that organism or population who has strongly positive influences on their environment plays an important role to maintain the available habitat.

通过上述几个方面的研究，主要得出以下15条结论：(1)生态位构建可使空间结构种群，甚至是在没有杂合子优势的条件下，形成多种可能的稳定基因型分布模式；(2)随着环境的破坏与恶化，种群的生态位构建作用加速其较早形成稳定多态以阻碍环境对种群的不利影响，解释了有机体在不利环境下的一种生活史对策；(3)生态位构建作用通过基因型—环境反馈机制及有限的基因交流导致基因型多态的稳定共存；(4)有机体的生态位构建作用是一种积极的动力改变环境进而改变其自然选择的方向；(5)生态位构建的时滞作用对集合种群动态和空间分布产生深刻影响；(6)集合种群大小在时滞的崭新效应和等权重效应下达到一固定值，而在首位效应下达到统计稳定，表明首位效应的影响最显著；(7)首位效应下生态位构建相对权重的增量和时滞的长度是影响系统不稳定性动态的关键因素；(8)适中的生态位构建强度有利于集合种群的续存；(9)生态位宽度变窄会减少集合种群的数量从而增加其灭绝风险；(10)时滞和生态位构建的双重作用使系统产生周期振荡，并在异质性环境中产生稳定的螺旋波，破碎的螺旋波和环形波三种分布模式；(11)集合种群与资源含量的空间分布因为相滞而互补；(12)具有生态位构建的集合种群续存不仅取决于侵占率与灭绝率之间的平衡，而且依赖于生态位构建能力同其生境的自然消耗速率之间的妥协；(13)当生境中适合侵占的斑块比例小于其侵占率与灭绝率之比时，生态位构建作用促使集合种群在一定条件下续存：(14)生境斑块的状态从不适合到适合转变过程中存在生态位构建强度和系统初始条件这两个阈值；(15)集合种群的大小同正生态位构建能力正相关，意味着对环境具有较强正作用的有机体对维持有效生境起积极作用。

Circularization may facilitate recycling of translation factors and/or the ribosome, since ribosomes leaving the 3'end of the mRNA would be in close proximity to the 5'end for reinitiation.

环化可能有利于翻译因子和/或核糖体的循环利用，当核糖体从3'端离开后就处于5'端附近。

Reductive conversion of geraniol to citronellol is adopted as a model reaction, and several factors in the reaction are discussed using gas chromatography method. The influence of n-hexane and butyl acetate, as organic solvents, on biocompatibility was studied; the influence of methanol, ethanol, glycol, n-butanol and 1-hexanol, as energy substance, on the transformation efficiency was compared, respectively; the catalysis capabilities of Baker's yeast, XST-KO yeast, LP yeast, alcohol yeast, dry yeast, Saccharomyces cerevisiae, Angel yeast and Meishan yeast were discussed. It has been proved that biocompatibility of n-hexane are much better than that of butyl acetate, and the hexane has been demonstrated the most effective in terms of the influence on biotransformation, Baker's yeast has shown the highest tranformation efficiency among the eight yeast strains.

以香叶醇转化为香茅醇作为模型反应，通过气相色谱法进行定性和定量分析研究了影响该有机相生物转化反应的几个基本因素，考察了两种有机溶剂正己烷和乙酸丁酯对生物相容性的影响，选用甲醇、乙醇、乙二醇、正丁醇和l-己醇分别作为能量物质进行实验，比较其对转化的影响并探讨了Baker's酵母、XST-KO酵母、LP酵母、酒精酵母、假丝酵母、干酵母、安琪酵母和梅山酵母八种不同酵母作为生物催化剂对模型反应的催化能力，结果表明，正己烷作为有机溶剂，其生物相容性明显好于乙酸丁酯，更加有利于该生物转化反应进行；乙二醇作为能量物质，该模型反应转化率最高；而 Baker's酵母作为生物催化剂，对该模型反应的催化能力最强，最适合作为该模型反应的催化剂。

Shanghai Star Co., Ltd., deputy party secretary Liu Tong Road, analysts believe that:"The new approach to the implementation of the reserve, will address the past, district and county town of indiscriminate grant of land and their own situation, land reserve land development approval centralized city center also facilitate the regulation of the management."

上海星有限公司党委副书记刘潼路，分析人士认为，："新的方法来执行的准备金，将解决过去，县城区和不分青红皂白地批地和他们的自己的情况下，土地储备土地开发批准集中的城市中心也有利于规范管理。"

You are a good and gifted people - the heirs of a great civilisation that contributes to all humanity.

你们是一个有很好的天赋的人民，伟大文明的继承人，有利于全人类。

With a long civilisation, China favours international exchange and loves world peace.

具有悠久的文明，有利于我国的国际交流与热爱世界和平。

Sensible regulations not only make it easier for new firms to get started, but also help established firms change direction and clapped-out firms declare bankruptcy.

合理的规章制度不仅有利于新公司的建立，同时还能帮助运转中的公司掉转方向，也使撑不下去的公司尽快宣布破产。

"Enlightened, advanced government is to not be afraid that common people exposes a problem, this is going up at all be helpful for promoting a government clean-fingered and efficient."

"一个开明的、先进的政府是不怕老百姓揭发问题的，这在根本上有利于促进政府廉洁高效。"

It is also beneficial for the normal immune monitor and cleanup.

它也有利于正常的免疫监测和清理。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。