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Isomap is a nonlinear dimensionality reduction method proposed and based on the theory of manifold. It not only can reveal the meaningful low-dimensional structure hidden in the high-dimensional observation data, but can recover the underlying parameter of data lying on a low-dimensional submanifold.

Isomap是提出的一种有效的基于流形理论的非线性降维方法，它不仅能够揭示高维观察数据的内在结构，还能够发现潜在的低维参教空间。

This method assumes a global embedding function in low dimensional space, then incorporates the relative compactness information of the data distributions on the global geometry to reconstruct sample data. Finally, the global low dimensional submanifold is obtained by minimizing the cost function.

该方法首先假定目标空间的整体映射函数，然后结合数据的全局几何结构分布信息进行数据重构，最后通过最小化准则函数来得到嵌入高维空间的低维子流形。

T not only can reveal the meaningful low-dimensional structure hidden in the high-dimensional observation data, but can recover the underlying parameter of data lying on a low-dimensional submanifold.

somap的理论基础是假设在高维数据空间和低维参数空间存在等距映射，但并没有进行证明。

Iron aluminides based on Fe3Al and FeAl are of interest for structural applications at elevated temperatures in hostile environments. This is because they generally possess excellent oxidation and sulfuration resistance, relatively low density, and low material cost.

FeAl金属间化合物是一种新型的高温材料，在最近的研究中受到极大的重视，由于其具有长程有序的特殊结构，从而带来一系列优异的特性，如优异的高温抗氧化和抗硫化性、相对较低的密度和低廉的价格等。

Sulfite production process at present is already very mature but production costs remain high, the low rate of sulfur oxidation, dust removal effect of poor, low yield of sulfur dioxide, sulfurous acid in the solid suspended matter and other issues and more.

目前亚硫酸生产工艺已经非常成熟，但是仍然存在生产成本高，硫氧化率低，除尘效果差，二氧化硫收率低，亚硫酸中固体悬浮物多等问题。

The effective treatment of low-grade sulfurous ore and the recovery of valuable minerals are of great significance for the sustainable development of mine and for the pollution reduction of low-grade pyrite.

寻找处理低品位硫矿石的有效方法，回收宝贵的有价矿产资源，对矿山的可持续性发展，减少低品位硫铁矿对环境造成的严重污染具有重要的意义。

Comparatively sundried flowers are more suitable to be extracted as an industrial material although the concrete yield of fresh flowers is a little more. At the same time the experiment process fully proves the selectivity of SFE-CO2. Low temperature and low pressure are suitable to extract concrete from natural flavor and fragrance;(2) The materials prepared to extract rutin are the flowers that are gotten rid of concrete by SFE-CO2. The extraction methods include the SFE-CO2 modified by alcohol, the method of hot alkali-precipitate with acid, and alkaly dissolving and acid subsiding combined with microwave or ultrasonic.

66%；产品运用GC-MS做了鉴定；虽然鲜花浸膏产率较高，但干槐花的物料状态更适合工业生产；同时实验过程充分体现了SFE-CO2的选择性，低温低压条件适合香料的SFE-CO2；(2)以超临界CO2(Supercritical CO2，简称SC-CO2)萃取过浸膏的干槐花为原料，运用夹带剂修饰的SFE-CO2、超声或微波或直接加热的碱溶酸沉法提取中药--芸香甙，相比之下，夹带剂修饰的SFE-CO2和超声辅助的碱溶酸沉法提取效果较好，芸香甙提取率分别为2。

Likewise, as construction enterprises are facing ever more intense market competition, and market competition in the construction enterprises can invincible, and the key lies in whether or not to provide superior quality, time limit for a project short, low-cost products, and enterprises can obtain certain results, the key lies in the availability of low cost.

同样，作为建筑施工企业也面临着更加激烈的市场竞争，建筑企业能否在市场竞争中立于不败之地，关键在于能否为社会提供质量优、工期短、成本低的产品，而企业能否获得一定的经济效益，关键在于有无低廉的成本。

The sucrose content of the low R/S line "NAU-LR-04" was higher than those of three highR/S lines at all stages, while the fructose content was lower in "NAU-LR-04". Changes ofactivities of sucrose synthase were similar to sink activities in all the lines, and theactivity of SuSy in low R/S line is higher than those of high R/S lines.

结果表明，不同根冠比肉质根的库活性变化基本一致，"破肚"后一周内达到最大；可溶性总糖、果糖、蔗糖含量初期下降，"破肚"期降至最低值，其中低根冠比品系'NAU-LR-04'蔗糖含量一直高于其它高根冠比品系，而其果糖含量则相对较低。

Measure character: Frequency limits: CH1:dResolution of C ～ 225MHz frequency: 10 / second time-interval resolution : N/A measures speed: Can amount to 200 times measure / the second mixes in limits of the voltage on GPIB sensitivity : DC ～ 100MHz: 200MHz of ～ of 5Vac+dc 100MHz of 20mVrms ～±: 225MHz of ～ of 5Vac+dc 200MHz of 30mVrms ～±: Input of 5Vac+dc of 40mVrms ～± adjusts:(CH1 chooses) impedance, coupling: 1M Ω or 50 Ω, ac or Dc are low connect filter: 100kHz, but switch attenuation:× 1 or reference of × 10 exterior time base inputs: 1, 5, 10MHz sparks: CH1, to rising / drop the edge sparks, the percentage that uses signal n or absolutely voltage install n, setting sensitivity mixes to low, medium or tall gate start: Automatic, the hand is moved (setting gate time or resolution digit); Exterior, defer interface: Standard GP-IB(IEEE 488.1 and 488.2), take; of SCPI compatible language to say RS-232 power source only: 10 ％ of 100-120VAC ±, 50, 60 or 10 ％ of 400Hz ± 10 ％ of 220-240VAC ±, 50 or 10 ％ of 60Hz ± are suttle: 3kg dimension: 348.3mm of × of 212.6 × 88.5H

测量特征：频率规模：CH1：dc～225MHz 频率分辨率：10位/秒时候距离分辨率：N/A 测量速度：可达200次测量/秒在GPIB上电压规模和灵敏度： DC～100MHz： 20mVrms～±5Vac+dc 100MHz～200MHz：30mVrms～±5Vac+dc 200MHz～225MHz：40mVrms～±5Vac+dc 输入调节：(CH1选择)阻抗，耦合： 1MΩ或50Ω，ac或dc 低通滤波器： 100kHz，可切换衰减：×1或×10 外部时基参考输入： 1，5，10MHz 触发： CH1，对回升/回升沿触发，用信号电平的百分数或相对电压设置电平，设置灵敏度至低、中或高闸门和启动：主动，手动(设置闸门时候或分辨率位数)；外部，延迟接口：尺度GP-IB(IEEE 488.1和488.2)，带SCPI兼容说话；只讲RS-232 电源：100-120VAC±10％，50，60或400Hz±10％ 220-240VAC±10％，50或60Hz±10％净重：3kg 尺寸：212.6×88.5×348.3mm

I can not make it blossom and suits me

我不能让树为我开花

When temperatures are above approximately 80 °C discolouration of the raceways or rolling elements is a frequent feature.

当温度高于 80 °C 左右时，滚道或滚动元件褪色是很常见的特征。