查询词典 W

If one square inch of copper is used as a heat dissipator for the TO-252, the J-A drops to approximately 50C/W. The SOT-223 package has a J-A of approximately 125C/W when soldered down to a minimum sized pattern (less than 0.1 square inch) and approximately 70C/W when soldered to a copper area of one square inch.

如果一平方英寸的铜是作为的TO - 252热消使用时，司法机构政务长下降到大约50 / W的的SOT - 223封装具有的司法机构政务长大约125C / W的焊接时下跌不到0.1平方英寸的最小尺寸为1型和大约70 / W型焊接时，一铜一平方英寸面积。

The main achievements of this dissertation are as follows: Let W be a nonsingular matrix. 1. Problem I and Problem II are considered under the matrix set S is as the following: 1 the set of real W-symmetrizable matrices; 2 the set of real W-symmetrizable nonnegative definite matrices; 3 the set of real W-symmetrizable matrices on the linear manifold.

对于问题I和问题II，本文就S是W可对称化矩阵集合、W可对称非负定化矩阵集合以及线性流形上W可对称化矩阵集合等三种情况进行了研究，分别给出了这三种情况下问题I的解存在的充分必要条件，以及解集合的通式表达式，给出了这三种情况下的最佳逼近解，并提供了相应的数值算法和数值实例。

Candida colonisation did not enhance oalbumin permeation in mast cell deficient W/W mice but did in congenic littermate control +/+ mice. Reconstitution of mast cells in W/W mice by transplantation of bone marrow deried mast cells restored the ability to increase oalbumin permeation in response to Candida colonisation.

念珠菌定植不加强肥大细胞缺陷W/W小鼠的蛋白通透性，而其同系同窝对照+/+小鼠则有加强，W/W小鼠通过骨髓肥大细胞移植重建肥大细胞功能可恢复念珠菌定植后对卵白蛋白通透性的增强作用。

Both of the thermophiles were motile by means of lophotrichous flagella and had high growth rate on medium containing cellulose. Optimal growth occured at 60℃ for the two thermophiles and at PH 7. 5 for Y, PH 7. 37. 5 for W strain. Y strain produced yellow pigment in cellulose medium and had yellow-colored, round or watery colonies in cellulose agar. The colonies of W strain were white -colored and similar in form to that of Y strain. The mesophile, Clostridium sp. B, was motile with peritrichous flagella. The colonies grown on cellulose agar were white and round with slightly undulate margins. The optimal growth temperature and PH of B strain were 40℃ and 7. 0-7. 2, respectively. All of the three Clostridia fermented varieties of carbohydrates and in cellulose media produced the similar end-products: CO〓H〓, ethanol and acetic acid. The DNA compositions were 34 mol% for Y and B, 35 mol% for W strain.

嗜热菌y与w在含纤维素的培养基中生长迅速，其最适生长温度均为60℃；最适PHy为7.5，w为7.3-7.5.y菌在纤维素培养基中产生黄色，在纤维素琼脂中菌落为黄色并呈圆形或流动粥样。w菌落为白色，但形状与y菌类似，嗜温菌B在纤维素琼脂上菌落为白色，圆形，边缘呈微小波状，最适PH与温度分别为7.0-7.2和40℃，三支菌都可发酵多种碳水化合物，且在纤维素培养基中产生同样的产物：CO〓H〓，乙醇和乙酸，三者DNA组成分别是y为34mol%，w 35mol%，B 34mol%。

The responses of mature and immature adults of Bactrocera correcta to methyl eugenol solutions at different concentrations (1%, 3%, 5%, 7%, 9%, w/w), to the mixture of ME and a sweet bait VA (12.5% vinegar, 25% alcohol and 62.5% H2O), and to the combination of the volatiles of ME solutions at different concentrations and a sweet bait SVA (2.5% sugar, 12.5% vinegar, 25% alcohol and 60% H2O) odor, were tested in Y-tube olfactometer in laboratory.

利用 Y-嗅觉仪测试不同生理状态番石榴实蝇 Bactrocera correcta两性成虫对系列质量分数(1%， 3%， 5%， 7%， 9% w/w)甲基丁香酚溶液、系列质量分数ME溶液与醋酒溶液醋∶酒∶水＝12.5%∶25%∶62.5%(w/w， VA混合液、系列质量分数 ME挥发物与糖醋酒溶液糖∶醋∶酒∶水＝2.5%∶12.5%∶25%：60%(w/w， SVA气味混合物的反应。

The luminous efficiency of cool white LEDs was improved from 38 lm/W to 66 lm/W through the optimum ratio of silicate phosphor. The luminous efficiency of white LEDs with YAG phosphor was 80 lm/W.

经研究最佳化后，以混矽酸盐萤光粉进行封装则光效可从38 lm/W提升至66 lm/W；以混YAG萤光粉进行封装光效可提升到80 lm/W。

Based on the theory of inverted STM image of Chen, we predict that if one uses a tungsten tip made of W (111), W (110) or W (001) surface, an inverted STM image may be observed under small bias voltages.

基于Chen的图像反转理论，预言在STM实验中如用W（111），W（110）和W（001）单原子钨探针，在小偏压条件下，可能会观测到STM负像，这三类钨针尖中利用W（110）针尖最容易观察到这类现象。

It is found that the structure of the ternary electroless Ni-W-P coating is greatly influenced by W content in the deposit. It is also found that the requisite content of phosphorus for amorphous Ni-W-P structure is less than that of Ni-P binary alloy coating, and the more tungsten exists, the less phosphorus is required. The hardness of the deposits will be enhanced as the deposit structures are changed from amorphous to mix-or nanocrystalline structures. The corrosion resistance of Ni-W-P ternary alloy is improved as W content increased, and the passivation of amorphous deposits is formed more easily than that of mix-structure and nanocrystalline deposits.

研究发现，化学镀Ni-W-P三元合金镀层的结构受镀层中钨含量的影响较大，非晶态Ni-W-P三元合金镀层所需磷含量较非晶态Ni-P二元镀层所需磷含量要低，并且钨含量越高，所需磷含量越少；镀层硬度随镀层结构从非晶态→混晶态→纳米晶态转变而增加；镀层的耐蚀性随镀层中钨含量增加而变好，且非晶态镀层较混晶态和纳米晶态镀层更易形成钝化区。

Geochemical characteristics indicate S-type granites and volcanic rocks depleted in sodium and enriched in potassium, with 62.42%～78.02% w(SiO2), 7.66%～9.13% w(K2O+Na2O), 1.18～2.62 w(K2O)/w(Na2O), and Rittmann index δ of 1.67～3.78. They are enriched in LREE with an average LREE/HREE ratio of 10.94×10-6, and generally depleted Eu with an minimum δEu less than 0.31 especially in the ignimbrite and biotite granite, which have experienced a significant process of separation and crystallization of plagioclases.ΣREE at the main stage of the magmatic activity decreases with time.

地球化学特征显示矿区火山——侵入岩属于贫钠富钾的S型花岗岩，其w(SiO2)值为62.42%～78.02%、w(K2O +Na2O)值为7.66%～9.13%、w(K2O)/w(Na2O)比值为1.18～2.62、里特曼指数δ为1.67～3.78；矿区岩石LREE/HREE比值平均为10.94×10-6，属于轻稀土富集型；Eu普遍亏损，特别是熔结凝灰岩、黑云母花岗岩δEu＜0.31，表明经历了显著的斜长石的分离结晶作用；自早至晚主阶段岩浆活动稀土总量逐渐降低。

From the upper part of the ore body to the rear part, [w(Na2O×w]/[w(K2O)×w] decreases regularly. The element association in the hanging wall is obviously different from that in the lying wall: the hanging wall is enriched with siderophile elements, while the lying wall has abundant thiophile elements.

多元素累乘比值[w(Na2O)×w]/[w(K2O)×w]从矿上向尾部具有规律的下降，矿体上、下盘的元素组合明显不同，矿体上盘富集亲铁元素，矿体下盘富集亲硫元素。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失