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All 1232 individuals collected could be classified into 3 phyla, 10 classes, and 16 orders. The dominant genera are Acari, Collembola and Hymenoptera, and the common genera is Heteroptera. Their frequencies are 41.07%, 17.21%, 35.23% and 2.11%, respectively. The rare genera included Corrodentia, Enchytraeidae, Isopoda, Diptera, Pauropoda, Symphyla, Araneae, Diplopoda, Lumbricidae, Nematoda, Coleoptera, Chilopda and Lepidoptera.
富阳环山乡重金属污染的农田生态系统中土壤动物以弹尾目和蜱螨目为优势类群,分别占总捕量的66.37%、16.72%,常见类群有双翅目的虱啮科、蠓科、摇蚊科,鞘翅目的隐翅甲科,线虫,线蚓等,它们分别占总捕量的5.81%、1.3%、1.3%、2.6%、2.3%和1.2%;其中,弹尾目中的优势属为符属和陷等属,分别占虫总捕量的33.03%和21.2%;常见属为棘属、陷等属、德属和原等属,分别占总捕量的4.3%、1.3%和3.21%。
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About 230 unique feature downfaulted basin in Mesozoic and kainozoc era distribute in the east continent and alongshore in China, which is the best concentric distribution area of continental facies oil-gas contain basin in the world.
陆相断陷盆地是世界上重要的含油气盆地类型之一,我国东部大陆及沿海分布着约230个各具特色的中、新生代陆相断陷盆地,是世界上最大的陆相含油气盆地集中分布区。
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Provable Security is a formal method for proving the security of cryptographic schemes, in which the difficulty of breaking a particular scheme is formally related to that of solving a widely believed computational hard problem. Provable security has already become an important theme of theoretical researches in modern cryptography. This dissertation investigates the provable security of public-key encryptions and hybrid encryptions of asymmetric and symmetric encryptions. This includes the various formal security notions and the constructions can be proved to achieve them. Among the constructions, hybrid encryptions are themselves an important way to obtain public-key encryption schemes with chosen ciphertext security. The main results are as follows:(1) The one-wayness of the trapdoor one-way function in NTRU depends on the randomness of the session key, which is different from previous ones. Based on this observation, a new kind of trapdoor one-way function, trapdoor one-way functions with an auxiliary random variable is proposed.
可证明安全性是一种证明密码学方案安全性的形式化方法,它将密码学方案的安全性归约为公认的计算难题,已成为现代密码学领域中理论工作的主线,本文主要研究公钥加密与单双钥混合加密的可证明安全性,这包括它们的各种形式化安全性定义以及达到这些安全性定义的方案构造,而单双钥混合加密本身也是一种构造选择密文安全公钥加密的重要方法,本文得到的主要结果如下:(1)在研究NTRU公钥加密的特殊性基础上,对于公钥加密的陷门单向函数加密模型进行了扩展,提出了具有辅助陷门单向函数的概念,并将其扩展到多元的情况,讨论了可能的密码学用途。
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The results indicated that the formation of fault basin constrained by magnetic crystalline basement. The more complex of the crustal tectonic, the greater the difference mechanical strength between crust media, the smaller thermal water release less, the easier bred major earthquake.6. Mapped the new quaternary tectonic map of four fault basin based on the data of shallow seismic profiles, drilling, and the redrawn fault system divided by the potential data processing, etc.
研究结果表明断陷盆地的形成受磁性结晶基底的制约;地壳结构越复杂,地壳介质之间的力学强度差异越大,热水点年释放量越小,就越容易孕育和发生大的地震。6、利用浅层地震剖面、钻井等资料,并参考重磁划分的断裂系,新编制了山西四个断陷盆地的第四系构造图。
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Thank God, I can sit and I can stand without the aid of a furniture warehouse. What man but a philosopher would not be ashamed to see his furniture packed in a cart and going up country exposed to the light of heaven and the eyes of men, a beggarly account of empty boxes?
这正如一个人把所有陷饼的机关都缚在他的皮带上,他搬家经过我们放着绳子的荒野时,不能不拖动那些绳子,——拖到他自己的陷饼里去了。
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They are not only distributed in the west part of Manjiaer depression and west part of Tabei uplift, but also in Tazhong uplift, Buchu uplift and Taxinan depression, covering an area of 20×104 km^2, and there are also 7 thickness centers for residual distribution.
大火成岩省的岩石单元分布在满加尔坳陷西段和塔北隆起西段,塔中隆起、巴楚隆起以及塔西南坳陷,几乎涵盖半个塔里木盆地,面积约20×10^4平方公里,并有7个残余分布的厚度中心。
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The pupose of the research is to develops public key encryption and digital signature shemes based on matrix canonical decomposition problem, or matrix diagonalization problem over Z/n, the ring of integers with modulo-n addition and multiplication in particular, where n is an RSA modulus.
本课题研究基于矩阵经典分解问题,特别是Z/n上矩阵对角化问题的公钥密码与数字签名算法,其中n是一个RSA模数。新算法采用由一个矩阵多项式构成的多维单向陷门函数,其单向性由矩阵对角分解问题(即通过相似变换将矩阵化为对角型的问题)的复杂性来保障,对该函数求逆的陷门由矩阵的特征值或特征向量提供。
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During later Paleogene and early Neogene, Jiyang Depression undergone from rifting activity to depression activity. During early Guantao Formation, fault active, highland eroded, slope overlapped and sags filled, and then when later Guantao Formation begin sedimented, paleotopography became plainness, new stratum overlaid all old stratum, intensity of fault activity gradually got in weaken, and developed the sedimentary system of alluvial-fluvial-freshwater shallow lake.
济阳坳陷在古近纪晚期,新近纪早期由断陷活动转为坳陷活动,经过馆陶早期的断剥超覆和填凹补平作用,到馆陶晚期古地形渐趋平缓,新地层覆盖在所有老地层之上,断层活动强度逐渐减弱,发育冲积扇-河流-淡水极浅湖沉积体系,具有良好的生储盖配置关系。
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In addition, the communication device provides a second mode of operation characterized by generating a second amount of nulling with respect to the at least one interfering source, wherein the second amount of nulling is relatively greater than the first amount of nulling.
此外,该通信设备提供了第二运行模式,第二运行模式的特征在于产生了与至少一个干扰源相关的第二零陷量,其中第二零陷量比第一零陷量大。
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The new ideas from this paper: using mechanics principle study of soil, create a practical test to prove that it could change the physical mechanics character of base soil completely, reducing distortion, improving strength, and eliminating wet or sinking of base soil by seal extrusion during hole formation process at certain replacement rate; it could strengthen the loessial soil base to high bearing capacity to standard value of 300 to 400kPa through seal extrusion to hole formation technology together with rammed cement soil pile. Some value of the parameters adopted by bearing capacity calculation of the composite base of rammed cement soil pile with seal extrusion to hole formation exceeded the criteria of 'Technical Regulation on Building Ground Treatment'.(JGJ79-2002) This technology meet the design requirements and save investment.
本课题的创新点:1 利用土力学原理进行研究及理论推导,并经实践:证明了在置换率为某一定值的情况下,在成孔过程中通过挤密作用可以从根本上改变地基土的物理力学性质,使地基土的变形减小,强度提高,湿陷性消除;2 挤密成孔工艺与夯实水泥土桩的组合,可使低强度的湿陷性黄土地基变成高强度的复合地基,其承载力特征值可达 300~400kPa;3 挤密成孔法夯实水泥土桩复合地基承载力计算所采用的有关参数取值范围超出了《建筑地基处理技术规范》JGJ79-2002 中的有关规定;4 在节省投资的前提下,解决了地基高承载力、低变形及黄土湿陷性问题,达到了设计要求。
- 推荐网络例句
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On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.
另一方面,更重要的是由于城市住房是一种异质性产品。
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Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.
气候直方图是将所收集的降水量测定值,分为几个相等的区间作为横轴,并将各区间内所测定值依所出现的次数累积而成的面积,用柱子排起来的图形,也叫做柱状图。
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You rap, you know we are not so good at rapping, huh?
你唱吧,你也知道我们并不那么擅长说唱,对吧?