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  如果
     A subgroup H of a group G is said to be weakly quasinormal subgroups in G if there exists an element x ∈G such that HKx=KxH.
     子群H称为在G中弱拟正规的,如果对任意K G,至少存在一个K的共轭子群Kx,x∈G,使得HKx=KxH.
短句来源
     If energy is a central concept of physics, information is that of informatics.
     如果说物质能是物理学的一个中心概念的话,那么信息能应当是信息科学的中心概念。
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     If we supposed the productivity of migrant worker is lower than that of city worker, then the share is 0.46% and 1.28% respectively, and the share is increasing.
     如果假设农民工劳动生产率低于城市产业工人,则农民工对中国第二三产业产值贡献占到这些产业产值的0.46%~1.28%,而且贡献份额有逐年增长的趋势。
短句来源
     The following conclusions are proved:(1) Let X= Πσ ∈ΣXσbe │Σ│-paracompact,then it is weakly subortho-compact if Πσ∈FXσis weakly subortho-compact for every F∈[Σ]< ω.
     文章证明了如下结果:(1)如果X=Πσ∈ΣXσ是│Σ│-仿紧空间,则X是弱subortho-紧空间当且仅当F∈[Σ]<ω,X=Πσ∈F Xσ是弱subortho-紧空间。
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     If design the new product with ADAMS/Car,it will shorten the time of design,reduce the cost and enhance the work efficiency.
     如果应用ADAMS/Car进行汽车产品的开发,将会极大地缩短产品开发周期,降低成本,提高工作效率。
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     What If A Person Was Isolated from Society?
     人与社会隔绝会怎样?
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     Conclusion It's necessary to convert to laparotomy to ensure patients' safety and improve the quality of the operation if it's difficult to complete the laparoscopic cholecystectomy.
     结论:腹腔镜胆囊切除术治疗中出血困难而转开腹手术,并不是腹腔镜胆囊切除术的失败,而是保证患者安全和提高手术质量所必须的。
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     The safe alternative antiplatelet agent for long administration should be used if aspirin resistance appears, prediction of AR and individualization of antiplatelet therapy would be an emerging direction of antiplatelet therapy.
     ASA用于抗血小板治疗及预防动脉硬化事件的脑血管病患者,有AR存在,应及时换用其它安全有效的抗血小板制剂,因阿司匹林需要长期应用,今后预测AR及抗血小板治疗个体化,将是未来抗血小板治疗的研究方向。
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     It is proved that 1) If 3 m n r,let s=16(n-m)2+(r-n)2+(r-m)2+12,if m+n+r>23s+3s2,graphs K(m,n,r)-A(|A|=2) are chromatically unique;
     证明了1)当3mnr时,令s=16(n-m)2+(r-n)2+(r-m)2+12,m+n+r>23s+3s2,则K(m,n,r)-A(A=2)是色唯一图;
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     A finite group G is a ST-group, if, for subgroups H≤K≤L with H s-seminormal in K and K s-seminormal in L, it is amways the case that H is s-seminormal in L. It is shown that for finite groups containing abnormal subgroups of prime power order, the class of solvable ST-groups coincides with the class of solvable PT-groups and also coincides with the class of solvable T-groups.
     有限群G被称为是一个ST-群,对于子群H≤K≤L使得H在KS-中半正规,K在L中s-半正规,则有H在L中s-半正规. 证明了对于含有素数幂阶的abnormal子群的有限群而言,可解ST-群类同可解T-群类和可解PT-群类是同一群类.
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  中频
     W6Mo5Cr4V2Al HIGH SPEED STEEL PRODUCTION BY IF INDUCTION-ESR PROCESS
     中频感应—电渣重熔法冶炼W6Mo5Cr4V2Al高速工具钢
短句来源
     For the 2.4GHz receiver the RF is tunable from 2.4 to 2.483GHz and the IF is 480MHz.
     对于2.4GHz接收机,射频频率为2.4~2.483GHz可调,中频频率为480MHz。
短句来源
     The down-conversion module receives RF signals between 3.4 GHz and 4.2 GHz and converts them down to IF frequency between 0.95 GHz and 1.75 GHz.
     下变频模块的功能是将接收到的3.4~4.2GHz射频信号下变频到0.95~1.75GHz的中频信号。
短句来源
     Design of Digital IF Receive System Based on AD6620 & AD6640
     基于AD6620和AD6640的数字中频接收系统实现
短句来源
     Digital IF Software Radio Receiving System Based on AD6620 & ADSP2191
     基于AD6620和ADSP2191的数字中频软件无线电接收系统
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  是否
     THE DISCUSSION ABOUT IF k_+/k_-=K_c SATISFIES ANY RENERSIBLE REACTION
     对k_+/k_-=K_c是否满足任何可逆反应的商榷
短句来源
     It is an important method of integral calculation in the area of applied mathematics to find the integral factor of Pdx+Qdy+Rdz,which is also an important method to judge if a three dimensional vector field is conservative.
     寻找Pdx+Qdy+Rdz的积分因子是应用数学领域中极为重要的积分计算方法,同时也是判断一个三维向量场是否为保守场的重要方法。
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     Objective: To detect if MDM2 can regulate the transcriptional activity of estrogen receptor α and β(ERα and ERβ).
     目的:检测MDM2基因对雌激素受体α和β(ERα和ERβ)是否具有转录活性调节作用。
短句来源
     Objective To determine if in vivo detection of choline by1H-magnetic resonance spectroscopy(1H-MRS) could differentiate between benign and malignant bone and soft tissue tumors.
     目的探讨磁共振氢质子波谱(1H-MRS)是否有助于四肢骨与软组织良恶性肿瘤的诊断及鉴别。
短句来源
     Objective: To explore if single-nucleotide polymorphisms(SNPs)at position -137、-607 in the promoter of interleukine-18(IL-18)gene can influence its gene expression.
     目的:探讨IL-18基因启动子-607C/A、-137G/C位点多态性是否影响其表达量。
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Such an action is called linearizable if it is equivalent to the restriction of a linear orthogonal action in the ambient affine space of the quadric.
      
We prove that if a reductive group action on an affine quadric with a 1-dimensional quotient has a linear model, then the action is linearizable.
      
As a consequence, the action is linearizable if certain topological conditions are satisfied.
      
An algebraicG-varietyX is called "wonderful", if the following conditions are satisfied:X is (connected) smooth and complete;X containsr irreducible smoothG-invariant divisors having a non void transversal intersection;G has 2r orbits inX.
      
This implies that a system is algebraically integrable (i.e., its eigenvalue problem is explicitly solvable in quadratures) if and only if the differential Galois group is commutative for generic eigenvalues.
      
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By surrounding a photo-neutron source of Ra+Ee with a thin spherical sbell of paraffin, a continuous spectrum of scattered neutrons, extending from zero energy to the energies of the primary neutrons is obtained. When a silver detector is exposed to such a spectrum, a part of the neutrons having just the energies at resonance with the silver nuclei is strongly absorbed by the detector and thereby produces the induced β-activity. By measuring the activity of silver and the apparent absorption coefficient of the...

By surrounding a photo-neutron source of Ra+Ee with a thin spherical sbell of paraffin, a continuous spectrum of scattered neutrons, extending from zero energy to the energies of the primary neutrons is obtained. When a silver detector is exposed to such a spectrum, a part of the neutrons having just the energies at resonance with the silver nuclei is strongly absorbed by the detector and thereby produces the induced β-activity. By measuring the activity of silver and the apparent absorption coefficient of the resonance neutrons in a thin silver absorber, the total width of the resonance levels effective to neutron capture and located in the above spectrum is estimated. Let τ He the average value of one half of the half-value width of the resonance levels, expressed in volts, and n be the number of resonance levels here concerned. We find nτ=260 volts for the silver nuclei of half period 22" if the energies of the primary neutrons are taken to be 2x 105 volts. Knowing nτ, we can evaluate the average spacing between adjacent resonance levels effective to neutron capture by giving a plausible value to τ. We find a spacing of the order 80-800 volts if τ be given the value 0.1-1.0 volt. This result is in good accord with the recent theoretical calculation of Bethe and also with observations of resonance groups in the low energy region.

把‘镭—铍’所产生的‘光中子’,穿过一层半厘米厚的白蜡,我们便得到一‘连续的中子谱’。他们中间有些中子,能和银的原子核起‘共振作用’,因此可以被银片吸收,而产生‘人工放射银’先测量人工放射的强度和‘共振中子’在银片中的吸收率,再应用原子核内共振能层的宽度,我们便可以求出银的原子核内‘共振能层’的密度大约共振能在零和二十万伏特中间,平均每隔一二百伏特便有一可以吸收质子的共振能层,和理论很相符合。

1. The conformity of the pattern of Cicindela anchoralis to what has been considered typical of the genus becomes in- telligible if the middle band, which is undoubtedly the most variable of the markings of this species, is assumed to have shifted forward and to have developed extensions both cephaled and caudad along the lateral margin and on the disc of the eIytron.2. The variation of the pattern is of the continuous type and proceeds in one principal direction. As expected, some in- dividuals depart...

1. The conformity of the pattern of Cicindela anchoralis to what has been considered typical of the genus becomes in- telligible if the middle band, which is undoubtedly the most variable of the markings of this species, is assumed to have shifted forward and to have developed extensions both cephaled and caudad along the lateral margin and on the disc of the eIytron.2. The variation of the pattern is of the continuous type and proceeds in one principal direction. As expected, some in- dividuals depart from this main series, in one way or another and ten such sub-types have been recognized in this study. The range of variation is very considerable.3. The male sex is found to have a greater tendency to lose its pigmentation, and this fact is interpreted as indicating its having a more variable middle band.4. Mating between the different types is entirely at random, the frequency of any given combination is apparently a function of the abundance of the individuals in a given class.5. In describing the elytral pattern of this species, Chevrolat (1845) used these words: "vitta anchorali, cum lienola pone humerum (femina amplioribus); cupreis". He evidently had regarded as typical the pattern showing fullest pigmentation. The present study shows, on the other hand, that such a pat- tern, while most primitive, is not the most representative. The typical pattern is to be sought in Class Ⅳ, the model class. This last remark certainly has wider application and merits the consideration of taxonomists describing highly variable forms.

斑蝥科甲虫翅鞘色型之差異,在一部份種類中,極为顯著。本篇所論,根據中國种錨紋斑蝥,於廿二年夏採於厦門北岸,計雌雄共九百餘個,內有交配者六十二對,所得結論如下: (一)本種色型,甚为異特。若以美人薛福特氏所立之本屬理想模式色型推解,則其中間淡色横斑,較为移前,其左右則向上下分枝成H形。 (二)此種色型之變異為連續式仝趨一主要方向,但依其變異之分岐,可别为十種副式色型,詳情已於西文中加以討論。 (三)雄虫翅鞘之中間淡色横斑變異較大,其深色紋斑之傾向於縮小亦因之較雌性为甚。 (四)兩性交配,与色型之差異,全無關係。 (五)大部份個數皆呈現中間色型。其趨向於兩極端者(深色或淡色特别發達者)乃屬少数。因此分類學者於記述变異極大之種類時,應发中間色型者為代表。

The quantized energy values of an electron enclosed in a spherical box are calculated by solving Schrodinger's wave equation. The energy levels are very close together if the sphere is of ordinary dimensions. But as the radius of the sphere decreases toward atomic dimensions, the value of every energy level increases and the spread between the levels also increases.

本文以波力学讨论电子在球形范围内运动时之情况。由计算得知。如球形大时,则电子之能层甚为密接,如球形之半径缩小至原子大小之程度,则其每一能层之值增大而能层与能层间之间隔亦增大。

 
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