NCV7381 FlexRay收发器：30ns钳位，满足电气规范的高速通信解决方案

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ELECTRICAL CHARACTERISTICS

BAT

= 5.5 V to 50 V, V

= 4.75 V to 5.25 V, V

= 2.3 V to 5.25 V, C

VBAT

= 100 nF, C

VCC

= 100 nF, C

VIO

= 100 nF, for typical values T

= 25°C, for min/max values T

= −40°C to 150°C; unless otherwise noted. All voltages are referenced to GND (pin 13). Positive currents

flow into the respective pin. (Note 6)

Symbol UnitMaxTypMinConditionsParameter

TRANSMISSION PARAMETERS

dBDTx10

Transmitter delay, negative edge

Test setup as per Figure 17

with

BUS

= 40 W; C

BUS

= 100 pF

Sum of TxD signal rise and fall

time (20% to 80% V

)

of up to 9 ns

Parameters defined in Figure 3

− − 75 ns

dBDTx01 Transmitter delay, positive edge − − 75 ns

dBDTxAsym Transmitter delay mismatch,

|dBDTx10 − dBDTx01| (Note 8)

− − 4.0 ns

dBusTx10 Fall time of the differential bus

voltage from 80% to 20%

6.0 − 18.75 ns

dBusTx01 Rise time of the differential bus

voltage from 20% to 80%

6.0 − 18.75 ns

dBusTxDif Differential bus voltage fall and rise

time mismatch

|dBusTx10 − dBusTx01|

− − 3.0 ns

dBDTxia Transmitter delay idle −> active

Test setup as per Figure 17

with

BUS

= 40 W; C

BUS

= 100 pF

Parameters defined in

Figure 4

− − 75 ns

dBDTxai Transmitter delay active −> idle − − 75 ns

dBDTxDM Idle−active transmitter delay

mismatch

|dBDTxia − dBDTxai|

− − 50 ns

dBusTxia Transition time idle −>active − − 30 ns

dBusTxai Transition time active −> idle − − 30 ns

dTxEN

LOW

Time span of bus activity 550 − 650 ns

dBDTxActiveMax Maximum length of transmitter

activation

650 − 2600

iBP

BMShortMax

iBM

BPShortMax

Absolute maximum output current

when BP shorted to BM – no time

limit

ShortCircuit

≤ 1 W

− − 60 mA

iBP

GNDShortMax

iBM

GNDShortMax

Absolute maximum output current

when shorted to GND – no time limit

ShortCircuit

≤ 1 W

− − 60 mA

iBP

−5VShortMax

iBM

−5VShortMax

Absolute maximum output current

when shorted to V

BAT

= −5 V – no

time limit

ShortCircuit

≤ 1 W

− − 60 mA

iBP

BAT27ShortMax

iBM

BAT27ShortMax

Absolute maximum output current

when shorted to V

BAT

= 27 V

– no time limit

ShortCircuit

≤ 1 W

− − 60 mA

iBP

BAT48ShortMax

iBM

BAT48ShortMax

Absolute maximum output current

when shorted to V

BAT

= 48 V

– no time limit

ShortCircuit

≤ 1 W

− − 72 mA

BDTransmitter

Bus interface equivalent output

impedance (Bus driver simulation

model parameter)

31 105 500

剩余26页未读，继续阅读

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物理：已知1mol的某种实际气体,在一定温度下,其压强随体积变化的函数关系为p=c/(v-b)-a/(v)^2式中a,b,c均为常量.求该气体系统经一准静态过程,体积由V1膨胀到V2时,气体对外界所做的功.

根据热力学第一定律，气体对...∆W=nCv(T2-T1)=nCv^((pV2)/(nR)-pV1)/(nR))(T2-T1) 其中，n为1mol，Cv可以看成是常量，T1和T2为气体的初始温度和末温度，p和V1、V2为已知数据，可以代入计算得到气体对外界所做的功。

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class SVDRecommender: def init(self, k=50, ncv=None, tol=0, which='LM', v0=None, maxiter=None, return_singular_vectors=True, solver='arpack'): self.k = k self.ncv = ncv self.tol = tol self.which = which self.v0 = v0 self.maxiter = maxiter self.return_singular_vectors = return_singular_vectors self.solver = solver def svds(self, A): if self.which == 'LM': largest = True elif self.which == 'SM': largest = False else: raise ValueError("which must be either 'LM' or 'SM'.") if not (isinstance(A, LinearOperator) or isspmatrix(A) or is_pydata_spmatrix(A)): A = np.asarray(A) n, m = A.shape if self.k <= 0 or self.k >= min(n, m): raise ValueError("k must be between 1 and min(A.shape), k=%d" % self.k) if isinstance(A, LinearOperator): if n > m: X_dot = A.matvec X_matmat = A.matmat XH_dot = A.rmatvec XH_mat = A.rmatmat else: X_dot = A.rmatvec X_matmat = A.rmatmat XH_dot = A.matvec XH_mat = A.matmat dtype = getattr(A, 'dtype', None) if dtype is None: dtype = A.dot(np.zeros([m, 1])).dtype else: if n > m: X_dot = X_matmat = A.dot XH_dot = XH_mat = _herm(A).dot else: XH_dot = XH_mat = A.dot X_dot = X_matmat = _herm(A).dot def matvec_XH_X(x): return XH_dot(X_dot(x)) def matmat_XH_X(x): return XH_mat(X_matmat(x)) XH_X = LinearOperator(matvec=matvec_XH_X, dtype=A.dtype, matmat=matmat_XH_X, shape=(min(A.shape), min(A.shape))) #获得隐式定义的格拉米矩阵的低秩近似。 eigvals, eigvec = eigsh(XH_X, k=self.k, tol=self.tol ** 2, maxiter=self.maxiter, ncv=self.ncv, which=self.which, v0=self.v0) #格拉米矩阵有实非负特征值。 eigvals = np.maximum(eigvals.real, 0) #使用来自pinvh的小特征值的复数检测。 t = eigvec.dtype.char.lower() factor = {'f': 1E3, 'd': 1E6} cond = factor[t] * np.finfo(t).eps cutoff = cond * np.max(eigvals) #获得一个指示哪些本征对不是简并微小的掩码， #并为阈值奇异值创建一个重新排序数组。 above_cutoff = (eigvals > cutoff) nlarge = above_cutoff.sum() nsmall = self.k - nlarge slarge = np.sqrt(eigvals[above_cutoff]) s = np.zeros_like(eigvals) s[:nlarge] = slarge if not self.return_singular_vectors: return np.sort(s) if n > m: vlarge = eigvec[:, above_cutoff] ularge = X_matmat(vlarge) / slarge if self.return_singular_vectors != 'vh' else None vhlarge = _herm(vlarge) else: ularge = eigvec[:, above_cutoff] vhlarge = _herm(X_matmat(ularge) / slarge) if self.return_singular_vectors != 'u' else None u = _augmented_orthonormal_cols(ularge, nsmall) if ularge is not None else None vh = _augmented_orthonormal_rows(vhlarge, nsmall) if vhlarge is not None else None indexes_sorted = np.argsort(s) s = s[indexes_sorted] if u is not None: u = u[:, indexes_sorted] if vh is not None: vh = vh[indexes_sorted] return u, s, vh def _augmented_orthonormal_cols(U, n): if U.shape[0] <= n: return U Q, R = np.linalg.qr(U) return Q[:, :n] def _augmented_orthonormal_rows(V, n): if V.shape[1] <= n: return V Q, R = np.linalg.qr(V.T) return Q[:, :n].T def _herm(x): return np.conjugate(x.T) 将上述代码修改为使用LM，迭代器使用arpack

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class SVDRecommender: def init(self, k=50, ncv=None, tol=0, which='LM', v0=None, maxiter=None, return_singular_vectors=True, solver='arpack'): self.k = k self.ncv = ncv self.tol = tol self.which = which self.v0 = v0 self.maxiter = maxiter self.return_singular_vectors = return_singular_vectors self.solver = solver def svds(self, A): if which == 'LM': largest = True elif which == 'SM': largest = False else: raise ValueError("which must be either 'LM' or 'SM'.") if not (isinstance(A, LinearOperator) or isspmatrix(A) or is_pydata_spmatrix(A)): A = np.asarray(A) n, m = A.shape if k <= 0 or k >= min(n, m): raise ValueError("k must be between 1 and min(A.shape), k=%d" % k) if isinstance(A, LinearOperator): if n > m: X_dot = A.matvec X_matmat = A.matmat XH_dot = A.rmatvec XH_mat = A.rmatmat else: X_dot = A.rmatvec X_matmat = A.rmatmat XH_dot = A.matvec XH_mat = A.matmat dtype = getattr(A, 'dtype', None) if dtype is None: dtype = A.dot(np.zeros([m, 1])).dtype else: if n > m: X_dot = X_matmat = A.dot XH_dot = XH_mat = _herm(A).dot else: XH_dot = XH_mat = A.dot X_dot = X_matmat = _herm(A).dot def matvec_XH_X(x): return XH_dot(X_dot(x)) def matmat_XH_X(x): return XH_mat(X_matmat(x)) XH_X = LinearOperator(matvec=matvec_XH_X, dtype=A.dtype, matmat=matmat_XH_X, shape=(min(A.shape), min(A.shape))) # Get a low rank approximation of the implicitly defined gramian matrix. eigvals, eigvec = eigsh(XH_X, k=k, tol=tol ** 2, maxiter=maxiter, ncv=ncv, which=which, v0=v0) # Gramian matrix has real non-negative eigenvalues. eigvals = np.maximum(eigvals.real, 0) # Use complex detection of small eigenvalues from pinvh. t = eigvec.dtype.char.lower() factor = {'f': 1E3, 'd': 1E6} cond = factor[t] * np.finfo(t).eps cutoff = cond * np.max(eigvals) # Get a mask indicating which eigenpairs are not degenerate tiny, # and create a reordering array for thresholded singular values. above_cutoff = (eigvals > cutoff) nlarge = above_cutoff.sum() nsmall = k - nlarge slarge = np.sqrt(eigvals[above_cutoff]) s = np.zeros_like(eigvals) s[:nlarge] = slarge if not return_singular_vectors: return np.sort(s) if n > m: vlarge = eigvec[:, above_cutoff] ularge = X_matmat(vlarge) / slarge if return_singular_vectors != 'vh' else None vhlarge = _herm(vlarge) else: ularge = eigvec[:, above_cutoff] vhlarge = _herm(X_matmat(ularge) / slarge) if return_singular_vectors != 'u' else None u = _augmented_orthonormal_cols(ularge, nsmall) if ularge is not None else None vh = _augmented_orthonormal_rows(vhlarge, nsmall) if vhlarge is not None else None indexes_sorted = np.argsort(s) s = s[indexes_sorted] if u is not None: u = u[:, indexes_sorted] if vh is not None: vh = vh[indexes_sorted] return u, s, vh将这段代码放入一个.py文件中，用Spyder查看，有报错，可能是缩进有问题，无法被调用，根据这个问题，给出解决办法，给出改正后的完整代码

eigvals, eigvec = eigsh(XH_X, k=self.k, tol=self.tol ** 2, maxiter=self.maxiter, ncv=self.ncv, which=self.which, v0=self.v0) # Gramian matrix has real non-negative eigenvalues. eigvals = np....

read(911,) Para_Inlst07 IF (TRIM(Para_Inlst07)=='POOL_STRUCTURE') THEN read(911,) NCV_Structure(N3Dpool) ENDIF allocate(OBCV_X(NCV_Structure(N3Dpool))) allocate(OBCV_Y(NCV_Structure(N3Dpool))) allocate(OBCV_Z(NCV_Structure(N3Dpool))) allocate(GAMA_OBCV(NCV_Structure(N3Dpool))) allocate(GAMA_OBX(NCV_Structure(N3Dpool))) allocate(GAMA_OBY(NCV_Structure(N3Dpool))) allocate(GAMA_OBZ(NCV_Structure(N3Dpool)))

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class svd_recommender_py(): #svd矩阵推荐 def svds(A, ncv=None, tol=0, which='LM', v0=None, maxiter=None, return_singular_vectors=True, solver='arpack'): if which == 'LM': largest = True elif which == 'SM': largest = False else: raise ValueError("which must be either 'LM' or 'SM'.") if not (isinstance(A, LinearOperator) or isspmatrix(A) or is_pydata_spmatrix(A)): A = np.asarray(A) n, m = A.shape if k <= 0 or k >= min(n, m): raise ValueError("k must be between 1 and min(A.shape), k=%d" % k) if isinstance(A, LinearOperator): if n > m: X_dot = A.matvec X_matmat = A.matmat XH_dot = A.rmatvec XH_mat = A.rmatmat else: X_dot = A.rmatvec X_matmat = A.rmatmat XH_dot = A.matvec XH_mat = A.matmat dtype = getattr(A, 'dtype', None) if dtype is None: dtype = A.dot(np.zeros([m, 1])).dtype else: if n > m: X_dot = X_matmat = A.dot XH_dot = XH_mat = _herm(A).dot else: XH_dot = XH_mat = A.dot X_dot = X_matmat = _herm(A).dot def matvec_XH_X(x): return XH_dot(X_dot(x)) def matmat_XH_X(x): return XH_mat(X_matmat(x)) XH_X = LinearOperator(matvec=matvec_XH_X, dtype=A.dtype, matmat=matmat_XH_X, shape=(min(A.shape), min(A.shape))) # Get a low rank approximation of the implicitly defined gramian matrix. #获得隐式定义的格拉米矩阵的低秩近似。 #这不是解决问题的稳定方法。 solver == 'arpack' eigvals, eigvec = eigsh(XH_X, k=k, tol=tol ** 2, maxiter=maxiter, ncv=ncv, which=which, v0=v0) #格拉米矩阵具有实非负特征值。 eigvals = np.maximum(eigvals.real, 0) #使用来自pinvh的小特征值的复杂检测。 t = eigvec.dtype.char.lower() factor = {'f': 1E3, 'd': 1E6} cond = factor[t] * np.finfo(t).eps cutoff = cond * np.max(eigvals) #得到一个指示哪些本征对不是退化微小的掩码， #并创建阈值奇异值的重新排序数组。 above_cutoff = (eigvals > cutoff) nlarge = above_cutoff.sum() nsmall = k - nlarge slarge = np.sqrt(eigvals[above_cutoff]) s = np.zeros_like(eigvals) s[:nlarge] = slarge if not return_singular_vectors: return np.sort(s) if n > m: vlarge = eigvec[:, above_cutoff] ularge = X_matmat(vlarge) / slarge if return_singular_vectors != 'vh' else None vhlarge = _herm(vlarge) else: ularge = eigvec[:, above_cutoff] vhlarge = _herm(X_matmat(ularge) / slarge) if return_singular_vectors != 'u' else None u = _augmented_orthonormal_cols(ularge, nsmall) if ularge is not None else None vh = _augmented_orthonormal_rows(vhlarge, nsmall) if vhlarge is not None else None indexes_sorted = np.argsort(s) s = s[indexes_sorted] if u is not None: u = u[:, indexes_sorted] if vh is not None: vh = vh[indexes_sorted] return u, s, vh这段代码主要是为了将scipy包中的SVD计算方法封装成一个自定义类，是否封装合适？如果不合适，给出修改后的完整代码

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r语言adf.test参数type

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from scipy.sparse.linalg import eigsh, LinearOperator from scipy.sparse import isspmatrix, is_pydata_spmatrix class SVDRecommender: def init(self, k=50, ncv=None, tol=0, which='LM', v0=None, maxiter=None, return_singular_vectors=True, solver='arpack'): self.k = k self.ncv = ncv self.tol = tol self.which = which self.v0 = v0 self.maxiter = maxiter self.return_singular_vectors = return_singular_vectors self.solver = solver def svds(self, A): largest = self.which == 'LM' if not largest and self.which != 'SM': raise ValueError("which must be either 'LM' or 'SM'.") if not (isinstance(A, LinearOperator) or isspmatrix(A) or is_pydata_spmatrix(A)): A = np.asarray(A) n, m = A.shape if self.k <= 0 or self.k >= min(n, m): raise ValueError("k must be between 1 and min(A.shape), k=%d" % self.k) if isinstance(A, LinearOperator): if n > m: X_dot = A.matvec X_matmat = A.matmat XH_dot = A.rmatvec XH_mat = A.rmatmat else: X_dot = A.rmatvec X_matmat = A.rmatmat XH_dot = A.matvec XH_mat = A.matmat dtype = getattr(A, 'dtype', None) if dtype is None: dtype = A.dot(np.zeros([m, 1])).dtype else: if n > m: X_dot = X_matmat = A.dot XH_dot = XH_mat = _herm(A).dot else: XH_dot = XH_mat = A.dot X_dot = X_matmat = _herm(A).dot def matvec_XH_X(x): return XH_dot(X_dot(x)) def matmat_XH_X(x): return XH_mat(X_matmat(x)) XH_X = LinearOperator(matvec=matvec_XH_X, dtype=A.dtype, matmat=matmat_XH_X, shape=(min(A.shape), min(A.shape))) eigvals, eigvec = eigsh(XH_X, k=self.k, tol=self.tol ** 2, maxiter=self.maxiter, ncv=self.ncv, which=self.which, v0=self.v0) eigvals = np.maximum(eigvals.real, 0) t = eigvec.dtype.char.lower() factor = {'f': 1E3, 'd': 1E6} cond = factor[t] * np.finfo(t).eps cutoff = cond * np.max(eigvals) above_cutoff = (eigvals > cutoff) nlarge = above_cutoff.sum() nsmall = self.k - nlarge slarge = np.sqrt(eigvals[above_cutoff]) s = np.zeros_like(eigvals) s[:nlarge] = slarge if not self.return_singular_vectors: return np.sort(s) if n > m: vlarge = eigvec[:, above_cutoff] ularge = X_matmat(vlarge) / slarge if self.return_singular_vectors != 'vh' else None vhlarge = _herm(vlarge) else: ularge = eigvec[:, above_cutoff] vhlarge = _herm(X_matmat(ularge) / slarge) if self.return_singular_vectors != 'u' else None u = _augmented_orthonormal_cols(ularge, nsmall) if ularge is not None else None vh = _augmented_orthonormal_rows(vhlarge, nsmall) if vhlarge is not None else None indexes_sorted = np.argsort(s) s = s[indexes_sorted] if u is not None: u = u[:, indexes_sorted] if vh is not None: vh = vh[indexes_sorted] return u, s, vh def _augmented_orthonormal_cols(U, n): if U.shape[0] <= n: return U Q, R = np.linalg.qr(U) return Q[:, :n] def _augmented_orthonormal_rows(V, n): if V.shape[1] <= n: return V Q, R = np.linalg.qr(V.T) return Q[:, :n].T def _herm(x): return np.conjugate(x.T)这段代码中使用的scipy包太旧了，导致会出现报错信息为：cannot import name 'is_pydata_spmatrix' from 'scipy.sparse' (D:\Anaconda\lib\site-packages\scipy\sparse_init.py)，将这段代码修改为使用最新版的scipy包

do ii=1,CircuitN_v do while(Logi(ii)==.false.) CondiPump0_v=CondiPump_v Dfr_max=0.0 Dp_max=0.0 CALL CalBCV(ii) CALL CalALS(ii) CALL CalIMP(ii) CALL CalArrayCD(ii) Dpressure_v(ii,1:NCV_v(ii))=Gauss(ArrayC_v(ii,1:NCV_v(ii),1:NCV_v(ii)),ArrayD_v(ii,1:NCV_v(ii)),NCV_v(ii)) CALL CalDflowRate(ii) do i=1,NCV_v(ii) if(Dp_max<abs(Dpressure_v(ii,i))) then Dp_max=abs(Dpressure_v(ii,i)) end if end do do i=1,NLS_v(ii) if(Dfr_max<abs(DflowRate_v(ii,i))) then Dfr_max=abs(DflowRate_v(ii,i)) end if end do if(Dfr_max>1000.0) then !CFR600!20180404wangjin修改 DT_v=DT_v0.75 !20200322 open(unit=36,file='输出卡_错误.dat') !20200322 write(36,) TimeNow_v,"Dfr_max=",Dfr_max,"DT_v=",DT_v !if(DT_v<1e-5) then ! DT_v=1e-5 !end if cycle else Logi(ii)=.true. end if do i=1,NCV_v(ii) CV_v(ii,i)%pressure=CV_v(ii,i)%pressure+Dpressure_v(ii,i) end do do i=1,NLS_v(ii) LS_v(ii,i)%flowRate=LS_v(ii,i)%flowRate+DflowRate_v(ii,i) !20190318 调试 !if(LS_v(ii,i)%flowRate<0.0) LS_v(ii,i)%flowRate=0.1 end do CondiPump_v=CondiPump0_v end do end do

这段代码是一个嵌套的循环结构，其中包含了多个子过程的调用。每个子过程的功能在代码中没有给出，你需要根据实际需求自行添加或者修改。在这段代码中，有两个主要的循环： 1. 外层循环 `do ii=1,CircuitN_v`，...

matlab程序模拟单个正电荷电位下的电子轨迹.rar

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范德瓦耳斯气体进行绝热自由膨胀.已知膨胀前后摩尔体积分别为V1与V1,摩尔定容热容为Cv.试求膨胀前后的温度变化用字母表示