浅论中国画的形神关系

绘画作品中，形与神何为重?这是历代画论十分关注的问题。从创作角度看，我国古代很早就出现了形神兼备的绘画作品。形神兼备、形神统一是中国绘画的审关理想追求。形与神之间的相互统一，形成了具有民族特色的审美特征。     

个人住房抵押组合贷款模型分析

由于个人住房抵押组合贷款对购买住房的同一借款申请人、使用同一抵押物、采用同一贷款期限、执行不同贷款利率，所以与单纯的政策性个人住房抵押委托贷款或商业性个人住房抵押贷款不同。为此，试图建立一个考虑居民收入增长的个人住房抵押组合贷款理论模型，通过该理论模型可以确定合理的贷款期限以及各年的还本付息额。结合本模型提出了改进现行的抵押贷款还款所采取的等额偿还法，采取随着居民收入的提高逐渐增加每期还款额，从而减少总的还款期限的建议。最后提出引入合同储蓄贷款的组合贷款理论模型，运用该理论模型可以测算引入合同储蓄贷款的组合贷款期限以及各年的还本付息额。     

二硅化钼机械球磨过程的研究

通过X射线衍射仪、电子显微镜和ZJM10T型搅拌机研究了MoSi2粉末球磨过程.结果表明:机械球磨过程中,MoSi2粉末的衍射峰强度随球磨时间的增加不断减弱且逐渐宽化;其机械化学变化随球磨时间的延长表现为:晶粒尺寸减小,显微应变增加,有效温度系数增加.机械化学效应因子之间的变化关系如下:晶粒尺寸与有效温度系数和显微应变呈逆变关系;显微应变随有效温度系数增加而增大.     

火车车钩舌面仿形自动堆焊机仿形系统设计

火车车钩舌面经常需要进行焊补，传统的手工堆焊工效低且质量差，为配合仿形自动堆焊机的研制，本文设计了自动堆焊机的控制系统，该系统采用眦控制技术，两个伺服电机、一个步进电机驱动和三维精密工作台机械传动，实现三坐标、多道自动堆焊，保证S面精确成型。经过调试及模拟运行后表明，该控制系统能使焊枪运动轨迹为要求的S形，并使Z向工作台在规定的时间内上下运动，保证了自动堆焊机的仿形精度和工作效率，达到其技术要求。     

Efficient expression of human factor Ⅸ cDNA in liver mediated by hydrodynamics-based plasmid administration

The transfection of plasmid DNA into mammalian cells is an indispensable tool in the study of gene transfer and gene function. Since the original report in 1990 on the successful expression of a reporter gene in muscle[1], plasmid DNA injection has been widely used to mediate gene transfer study. As a gene transfer vector, naked DNA has many obvious advantages. It is easy and cheap to be prepared and more safe after transfection. But the plasmid mediated gene expression is low because of t…     

Shift visual cryptography scheme of two secret images

A new visual cryptography scheme of two secret images, which is named the shift visual cryptography of two secret images, is given. The compound function family of a general construction model is also introduced. The uniqueness and validity of this model are proved, and the minimum rows and columns for realizing the scheme are obtained. Compared with visual cryptography of one secret image, the shift visual cryptography scheme can share two secret images with the same size of pixels expansion without losing the contrast. It has randomness and various forms, and furthermore, we can also visually recover two secret images even if the two shares are different in form and color.     

Rapid cold hardening process of insects and its ecologically adaptive significance

In contrast to overwintering cold hardening, a rapid cold hardening process has recently been described in insects. This process can rapidly enhance cold tolerance of insects in several hours or even minutes. The characteristics of rapid cold hardening include inducing conditions, cold hardening effects, and fitness costs. Physiological and biochemical mechanisms of rapid cold hardening include rapid changes in the phospholipid composition and the increase in hemolymph osmolalities, polyols production, proline and cold-induced proteins. Moreover, there are different views about the ecologically adaptive significance of rapid cold hardening in insects. This paper reviews research results about rapid cold hardening of insects since 1987, focusing on forms of cold injury, strategies of cold tolerance, and definitions, characteristics, physiological and biochemical mechanisms and adaptive significance of rapid cold hardening.     

井下掺液抽稠油泵研究

通过对常规泵进行串联、改造 ,研制出了井下掺液抽稠油泵。对泵结构的可行性进行了论证 ,阐述了泵的工作原理 ,并对泵的工作参数进行了分析。该泵是通过从油管掺入液、从油套环空产出液 ,在上冲程时吸入产出液 ,在下冲程时举升混合液 ,从而实现了在柱塞下方掺液 ,避免了出现砂磨柱塞的现象 ,减少了稠油对柱塞运动的阻力 ,克服了泵上掺液不能降低进泵原油粘度的缺点 ,解决了在井筒降粘和稠油抽汲中存在的问题。该泵使用了连动式凡尔与弹簧 ,保证了底阀与顶阀打开与关闭的同步性 ,能够达到吸入产出液、加入掺入液以及举升混合液同时进行的目的。该泵的设计原理可行 ,工艺容易实现 ,是一种理想的新型抽稠油泵。     

Abnormal piezoresponse behavior of Pb（Mg1／3Nb2／3）O3-30% PbTiO3 single crystal studied by high vacuum scanning force microscopy

The piezoresponse behavior dependence of the Pb(Mg1/3Nb2/3)O3-30%PbTi03 single crystal on the vacuum degree has been investigated by scanning force microscopy in the piezoresponse mode under high vacuum. Unusual piezoresponse behavior related to the screening charges compensation mechanism is observed on the (111) crystal face. The significant piezoresponse degradation behavior with low piezoresponse signal under high vacuum is attributed to the instability of the polarization state due to the insufficient compensation of the intrinsic screening charges for the polarization charges in PMN-30%PT single crystal. In contrast, the remarkable domain contrast of the sample at ambient pressure is owing to the dominant surface screening charges deriving from surface adsorption, which plays an important role in determining the stability of the domain behavior and in achieving the optimal properties.     

Building of hFⅨ transgenic mice by spermatogenic cells

Human FⅨ expression vector pCMVⅨ was packaged by effectene^TM reagent and injected into mice seminiferous tubules with glass pipettes.The expressional frame of pCMVⅨ was examined by PCR and Southern blotting among 41 progenies.There were 2(4%) mice being integrated with hFⅨ gene into chromosomes.4.6ng/mL of hFⅨ protein was expressed in plasma of one mouse,which was tested by ELISA.We demonstrated that building of transgenic animals by spermatogonial stem cells is an efficient method.Meanwhile,it has also been proved to be an alternative choice for mammary gland bioreactor.