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More than 330 islands speckle Fijian waters, which hold nearly 4,000 square miles (10,350 square kilometers) of reef, a vital trove of marine biodiversity.

超过330岛屿似斑点样组成斐济水域,那里掌握接近4000平方英里(10350平方公里)的暗礁群,那是一个重大的收藏海上生物多样性的地方。

If you like writing, determine whether you can write short stories, poetry, or a full-fledged novel.

如果你喜欢写作,那么你就决定你是不是可以写写短的故事、诗歌、或者似模似样的小说。

The following conclusions have been made in this paper.(1) Based on CO_2 flux data of eddy covariance, variation characteristics of gross primary productivity in four flux observation stations were studied, which are an alpine meadow, an alpine shrub meadow, a swamp alpine meadow and a steppe alpine meadow at Dongxiong. The results show that photosynthetic capacity of the alpine meadow is the highest, and the annual total GPP is 652.2g C/m~2. Daily-differencing approach is used to analyze the random error of CO_2 fluxes measurements. The results show that the distribution of random error follows more closely follows a double-exponential, rather than a normal distribution, capturing the high peak and thick tail, and the random error varies with environment variables, which violates the assumptions for the ordinary least squares fitting with normality and homoscedasticity, consequently, we introduce maximum likelihood method for parameter optimization.

本文主要在以下几个方面开展工作并获得了一些认知和结论:(1)通过分析样带区域内高寒草甸、高寒灌丛、沼泽化湿地和草原化高寒草甸四个通量观测站点草地生态系统总初级生产力变化特征,研究结果表明HBBT矮嵩草草甸生态系统植被光合作用能力较强,年GPP总量为652.2 gC/m~2,明显高于其他三种生态系统;通过利用"单塔日变化法"获得四站点通量观测数据随机误差,结果表明通量观测随机误差概率分布呈现尖峰厚尾的特征,与正态分布相比,更服从双边指数分布,进一步分析表明通量观测随机误差随环境变量(风速、温度和光合有效辐射)的变化而变化,这违背了普通最小二乘法进行生态过程模型参数优化正态分布且误差同质的假设,因此本研究中引入最大似然法进行生态过程模型参数优化。

Topics covered include: density estimation incorporating such topics as kernel density estimates, nearest neighbor estimates, variable kernel methods, orthogonal series estimates, maximum penalized likelihood estimates

包括:密度估计(如:核密度估计,最近邻估计,可变核方法,正交序列估计,最大补偿似然估计法,带宽选择),非参数回归(如:核方法,样条方法,补偿似然估计,带宽选择,广义可加模型,)和bootstrapping方法。

Topics covered include: density estimation (incorporating such topics as kernel density estimates, nearest neighbor estimates, variable kernel methods, orthogonal series estimates, maximum penalized likelihood estimates, bandwidth choice), nonparametric regression (incorporating kernel methods, spline methods, penalized likelihood, bandwidth choice, generalized additive models), and bootstrapping.

非参数建模专题:非参数建模专题:基于计算机的非参数统计方法论。包括:密度估计(如:核密度估计,最近邻估计,可变核方法,正交序列估计,最大补偿似然估计法,带宽选择)非参数回归(如:,核方法,样条方法,补偿似然估计,带宽选择,广义可加模型,)和 bootstrapping 方法。

Results 12 cases as abdominal hernia (of which indirect hernia 9 cases, direct hernia 2 cases, femorocele 1 case), ultrasonography shows middle-high echo or linkage heterogeniety echo clumps; 8 cases as hydrocele, Ultrasonogram shows anechoic; 2 cases as cryptorchidism, ultrasonography shows normal testicular middle-echo; 4 cases as lymph node mass (of which lymphoma 2 cases, lymph node metastasis 1 case, lymph node inflammatory change 1 case), acoustic image shows low weak echo; 4 cases as substance mass (of which fibroma 1 case, spermatic cord tumor 1 case, Desmoid tumor 1 case, spermatic cord inflammation 1 case), Ultrasonography shows non-uniformity middle-highor low echo.

结果 12例为腹外疝(其中斜疝9例、直疝2例、股疝1例),声像图表现为中高回声或混杂性回声团块;8例为鞘膜积液,声像图表现为无回声;2例为隐睾,声像图表现为似正常睾丸样中等回声;4例为淋巴结包块(其中淋巴瘤2例、淋巴结转移1例、淋巴结炎性改变1例),声像图表现为低弱回声;4例为实质性包块(其中纤维瘤1例、精索肿瘤1例、韧带样瘤1例、精索炎症1例),声像图表现为非均匀性中高回声或低回声。

As a differential detection is used between the intercarrier, the proposed algorithm overcome the high sensitivity to timing error of conventional algorithm and is robust to multi-path. The effect of sample frequency offset can't be ignored in a continuous OFDM system of a large number of subcarriers. The estimation precision of the conventional algorithm is low and the realization is complex. A joint estimation of sample frequency offset and fine frequency offset based on difference operation is proposed. As averaging use a large number of samples in a maximum likelihood algorithm, the estimation precision is very high. The use of difference operation cancel the effect of carrier frequency offset, and the proposed sampling frequency estimation algorithm is robust to carrier frequency offset.

最后,本文对连续系统中的采样频率和载波频率精同步技术进行较为深入的研究,由于子载波数目大的连续OFDM传输系统中,采样频率偏差不可忽视,以往的采样频率估计方法精度低、实现复杂,因此本文提出了一种基于差分处理的采样频率偏差和精载波频率偏差联合估计算法,利用了最大似然算法进行采样频率偏差的估计,由于采用了差分处理方法,消除了载波频率偏差对采样频率偏差估计的影响,采用的最大似然算法对大量样点进行平均化处理,所以,相对以往算法,提出的联合算法估计精度高,而且采样频率偏差估计对载波频率偏差具有鲁棒性。

The sensitivity, specificity, accuracy, positive prevalue, negative prevalue, positive likelihood ratio and negative likelihood ratio of hc2 for high-risk HPV were 100%, 87. 1%, 87. 3%, 8.8%, 100%, 7.7 and 0. 000 , respectively ; and those of gene chips were 78.6%, 91.1%, 90. 9%, 9.9%, 99.7%, 8.8 and 0. 235 respectively.

HC2法检测高危HPV对高度宫颈上皮内瘤样病变HSIL的灵敏度、特异度、准确性、阳性预测值、阴性预测值、阳性似然比和阴性似然比分别为100ˇ、87ˇ1ˇ、87ˇ3ˇ、8ˇ8ˇ、100ˇ、7ˇ7和0ˇ000ˇHPV分型基因芯片法以上各指标分别为78ˇ6ˇ、91ˇ1ˇ、90ˇ9ˇ、9ˇ9ˇ、99ˇ7ˇ、8ˇ8和0ˇ235。

According to Ronal Samani, Regus Kenya Managing Director, Kenya's position as a growing economic hub in Africa presented the impetus for the company's decision to move here.

据ronal样似,雷格斯肯尼亚董事总经理,肯尼亚的立场,作为一个不断增长的经济枢纽,在非洲介绍了动力,为公司的决定迁往这里。

But these two crazy Chinese kids captured the hearts of many all over the world with their passionate lip-syncing to Backstreet Boys' "I want it that way".

但这两个疯狂的中国男孩郤夺了全世界网民的目光,他们激情投入的扮唱(即播音乐带配合唇形模仿唱歌)著名乐队后巷男孩的&I want it that way&歌曲,确是似模似样。

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The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应,而且减少跟风的可能性。

The new PS20 solar power tower collected sunlight through mirrors known as "heliostats" to produce steam that is converted into electricity by a turbine in Sanlucar la Mayor, Spain, Wednesday.

聚光:照片上是建在西班牙桑路卡拉马尤城的一座新型PS20塔式太阳能电站。被称为&日光反射装置&的镜子将太阳光反射到主塔,然后用聚集的热量产生蒸汽进而通过涡轮机转化为电力