概念学习是指从特殊的训练样例中归纳出覆盖正例排斥反例的一般规律。
Concept leaning is to induce the general rules from specific training examples and the rules are expected to both cover the positive examples and exclude the negative examples.
然后，借助已标记的部分正例样本，从未标记样本中抽取更多的正例样本；
Thirdly, with the help of positive documents, more positive documents are extracted from the unlabeled documents.
通过与标记部分正例样本的PU学习算法对比，实验证明该方法能够建立性能较好的分类器。
The experiment results show that the proposed approach performs very better than the PU learner based on labeled partially positive documents.
本文基于多值逻辑函数极小化提出一种正例学习问题，并对这一正例学习问题给出一个启发式学习算法。
This paper presents a learning problem from positive examples based on multiple valued minimization paradigm. A new heuristic algorithm for the problem is given.
实验结果表明：现有算法以16%的有效扩展规则覆盖了93%的标注正例，并使预期精度从51%提高到81%，显示了这套规则学习和评价方法的有效性。
Test results indicate that the algorithm can acquire about 16% of the useful expanded rules to cover 93% of the annotated positive examples and can improve the expected accuracy from 51% to 81%.
该组织目前正以大约每周一例的速度接收新的病例，其中许多疾病发生在如此年轻的人身上是极为罕见的。
The group is receiving new cases at a rate of about one a week, many of which are extremely rare at such young ages.
因怀疑与32例肝损害病例有关，英国一种非处方减肥药正遭到美国食品药物管理局的调查。
A slimming drug available over the counter in the UK is being investigated for links to 32 cases of liver damage by the US Food and drug Administration.
我们正集中于四个大的用例，我想它们覆盖到了多数用例。
There are four really big use cases we're focusing on and I think these cover the majority of other cases.
以放牧生态系统为例，本文分析了系统组分种密度相关的种群调节中的正、负反馈和机制。
Taking the grazing ecological systems as an example, the positive and negative feedback of the density dependence population regulations was analysed.
第二部分以美国为例研究了股市财富正效应，并指出了美国股市财富效应的双重性；
The second part studies the positive fortune effect and shows the dualism of America fortune effect of stock market.
方法对82例椎弓完整性腰椎滑脱症的正侧位、双斜位X线平片及CT图像(24例加作CT扫描)进行分析。
Methods To analyse X-ray images of lumbar vertebrae positive side and left-right oblique position plain films and CT images (only 24 cases) of 82 patients.
方法对45例胸腰椎爆裂性骨折的X线正侧位片和CT轴扫的影像学进行回顾性分析。
Methods The features of the frontal and lateral X-ray films and CT in 45 cases of burst fracture of thoracolumbar spine were reviewed.
通过实际算例同其他公式相比较分析，给出了一种实用方便的正截面极限承载力验算公式。
The analysis and comparison with other formula by calculation examples offer a more convenient and practical formula for normal section flexural load-bearing capacity.
文中导出了正方排列和正三角梭锥（正四面体）排列两种型式的三维（立体）声系统作为这组公式应用之例。
At last, the cases of three dimensional surrounding sound systems with cube array and triangular pyramid array models by using these formulas are illustrated for example in this paper.
方法对下颈椎不稳症21例均采用正侧双斜位及摄X线动态颈椎侧位过曲过伸片。
Methods X-ray posteroanterior, lateral, double-oblique and dynamic lateral overflexional and overextensive views were performed on 21 patients.
比如，以氯为例，我们可以说氯的电子亲和能，应该等于正的，349，千焦每摩尔。
So, for example, for the chlorine case, we would say that the electron affinity for chlorine is actually positive 349 kilojoules per mole.
方法收集7例经手术、病理证实的脊柱骨单发嗜酸性肉芽肿，术前均摄脊椎正、侧位X线片。
Methods Collecting 7 patients who were verified by operation and pathology of single eosinophilic granuloma of vertebrae, there were X ray films before operation every patient.
通过算例比较表明，实用计算式可简便并偏于安全地计算正放四角锥网架结构的临界温度。
The calculated example shows that the practical equation can calculate the critical temperature for regular pyramidic space trusses.
以车削正四棱柱为例，进行了误差分析，得到了刀具长度与工件尺寸和容许误差间的关系。
Then by taking the regular square prism as an example, the machining error is analyzed, and the relationship among the length of the lathe tool, the work dimension and the tolerance is obtained.
结果：36例术后眼位正，眼球运动良好。
Result: 36 cases got right position of eyes and good eyes' movement.
上皮显示不全角化或过度不全角化者17例，正角化或过度正角化者4例，无角化者3例。
Epithelium showed a para-orhyperparakeratosis in 17 cases, an ortho-or hyperorthokeratosis in 4 cases, unkeratinizationin 3 cases.
文章以狗板皮正鞋面革为例，对狗板皮制革工艺。成革理化指标及革的外观性能作了较为详细的介绍。
Thispaper also gives the details about the upper leather technology of dog skin with poor hair, the chemical and physical testing standard and outline property.
结果表明，DNA倍体水平分布范围为2.47 ~ 1.79，无正常二倍体(2c)，41例皆为非正倍体的异多倍体。
The distribution of DNA ploidy was 2.47 ~ 11.79c, with no normal diploid (2c). All the 41 cases were aneuploidy and polyploid.
以正六边形阵列为例，分析了在不同湍流强度或者传输距离时，抖动对远场造成的的影响。
The influence of jitter on far-field also been given with different turbulent intensity or transmission distance based on a hexagonal-shaped laser array.
本文研究的是《说文》中的重文形声字，主要是指重文为形声字、它所对应的正篆也为形声字的一组字例。
This study is of Shuo wen's Chongwen Phonogram Characters which is mainly refers to a group of words which both the Chongwen and its corresponding Standard Seal are Phonogram Characters.
本文研究的是《说文》中的重文形声字，主要是指重文为形声字、它所对应的正篆也为形声字的一组字例。
This study is of Shuo wen's Chongwen Phonogram Characters which is mainly refers to a group of words which both the Chongwen and its corresponding Standard Seal are Phonogram Characters.
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